COMPRESSOR FOR DISCHARGING A MEDIUM

Abstract

In a compressor for discharging a medium, in particular tire sealant that is to be discharged from a container into a tire, wherein a motor (1) of the compressor (P) drives a step-up transmission wheel (3, 3.1) for moving at least one piston (6-6.6) in a compression chamber (7), the step-up transmission wheel (3, 3.1) is intended to be provided only partially on its circumference with a toothing (20) and/or to consist of two toothed wheels (11, 12) lying on each other.

Claims

1. A compressor for discharging a medium, in particular tire sealant that is to be discharged from a container into a tire, wherein a motor (1) of the compressor (P) drives a step-up transmission wheel (3, 3.1) for moving at least one piston (6-6.6) in a compression chamber (7), characterized in that the step-up transmission wheel (3, 3.1) is provided only partially on its circumference with a toothing (20) and/or consists of two toothed wheels (11, 12) lying on each other.

2. The compressor as claimed in claim 1, characterized in that the step-up transmission wheel (3) is connected eccentrically to an output wheel (4) and, by way of the latter, to a piston rod (5), which moves a piston (6) in a compression chamber (7).

3. The compressor as claimed in claim 2, characterized in that the output wheel (4) consists of two wheel halves (4.1, 4.2), each with a toothing (14.1, 14.2), wherein the toothing (14.1) of one wheel half (4.1) extends about one arc distance and the toothing (14.2) of the other wheel half (4.2) extends about another arc distance.

4. The compressor as claimed in claim 3, characterized in that the arc distance is in each case 180°.

5. The compressor as claimed in claim 1, characterized in that the two toothed wheels (11, 12) lying on each other interact alternately with one or other wheel half (4.1, 4.2) of the output wheel (4).

6. The compressor as claimed in claim 5, characterized in that one toothed wheel (11) has a greater diameter than the other toothed wheel (12).

7. The compressor as claimed in claim 1, characterized in that the step-up transmission wheel (3.1) interacts with two mutually opposite toothings (19.1, 19.2) of a fork element (15).

8. The compressor as claimed in claim 7, characterized in that the fork element (15) forms an elongate opening (18) into which the step-up transmission wheel (3.1) engages and in which the toothings (19.1, 19.2) are also arranged.

9. The compressor as claimed in claim 7, characterized in that pistons (6.1-6.6) are arranged on both sides of the fork element (15).

10. The compressor as claimed in claim 8, characterized in that pistons (6.1-6.6) are arranged on both sides of the fork element (15).

Description

[0019] According to FIG. 1, a compressor P according to the invention has a motor 1, which is cooled by a fan 2. A step-up transmission wheel 3, which sits on a motor shaft (not shown), interacts with an output wheel 4.

[0020] The output wheel 4 is connected eccentrically to a piston rod 5, which moves a piston 6 (FIG. 3) in a compression chamber 7. A valve piece 8, which has a line 9 to a tire, for example, and has a connection 10 to a container for tire sealant, for example, is attached to this compression chamber 7.

[0021] This compressor functions as follows:

[0022] The step-up transmission wheel 3 is moved in rotation via the motor 1 and transmits its rotational movement to the output wheel 4. The latter in turn moves the piston rod 5 in the compression chamber 7. In this way, air is forced out of the compression chamber 7 into the valve piece 8 and into the line 9. A medium, in particular tire sealant, is then either sucked in from a container (not shown) via the connection 10 or is additionally forced into the line 9 and thus introduced, for example, into a tire that is to be sealed.

[0023] The present invention relates in part to an improvement of the force transmission of the force of the motor 1 to the piston rod 5 or the piston 6. It is known that more force is needed when compressing the air in the compression chamber 7 than when sucking new air into the compression chamber. To take account of this force relationship, both the step-up transmission wheel 3 and also the output wheel 4 are preferably formed in two parts. According to FIG. 4, the step-up transmission wheel 3 consists of two toothed wheels 11 and 12 which lie on each other and which have a congruent opening 13 for receiving a motor shaft. Moreover, the toothed wheel 11 also has a greater diameter than the toothed wheel 12.

[0024] The output wheel 4 consists of two halves 4.1 and 4.2. Each half is provided with a toothing 14.1 and 14.2, respectively. Each toothing 14.1 and 14.2 extends over only a half circumference of the respective output wheel half 4.1, 4.2, while the other half is free of toothing. Here too, provision is made that the output wheel half 4.2 with the toothing 14.2 has a greater diameter than the output wheel half 4.1 with the toothing 14.1. The toothed wheel 12 with the smaller diameter interacts with the output wheel half 4.2 with the greater diameter, while the toothed wheel 11 with the greater diameter interacts with the output wheel half 4.1 with the smaller diameter. As soon as the toothed wheel 12 with the smaller diameter comes into engagement with the toothing 14.2 of the output wheel half 4.2, a greater force can thus be applied by the step-up transmission ratio, such that this state of engagement is preferred when a greater force is intended to act on the piston 6 during the compression. When the piston 6 retreats in order for new air to be sucked into the compression chamber 7, the toothed wheel 11 with the greater diameter is then in engagement with the toothing 14.1 of the output wheel 4.1 with the smaller diameter.

[0025] FIGS. 5 to 8 show a further illustrative embodiment of a possible actuation of two pistons 6.1 and 6.2 in two compression chambers (not shown). The two pistons 6.1 and 6.2 are connected to each other via a fork element 15. For this purpose, the fork element 15 has two curved side flanks 16.1 and 16.2 which connect two connector stubs 17.1 and 17.2 on the pistons 6.1 and 6.2 to each other. The side flanks 16.1 and 16.2 enclose an elongate opening 18, and, within the interior of this elongate opening 18, parts of the side flanks 16.1 and 16.2 extending approximately parallel to each other are provided with a toothing 19.1 and 19.2, respectively.

[0026] A step-up transmission wheel 3.1, approximately half of which is provided with a further toothing 20, engages in this elongate opening 18.

[0027] This illustrative embodiment of a gear according to the invention, in particular for compressors, functions as follows:

[0028] The step-up transmission wheel 3.1, which sits on a shaft of a drive, rotates about its axis A. In doing so, the toothing 20 of the step-up transmission wheel 3.1 runs along the inner toothing 19.1 of the side flank 16.1, such that the fork element 15 moves downward according to the arrow 21 when the step-up transmission wheel 3.1 is fixed in position. During this, the piston 6.2 moves deeper into its compression chamber and forces the fluid or gas contained therein out of this compression chamber. At the same time, the piston 6.2 moves out from its associated compression chamber and sucks in fluid or gas.

[0029] FIG. 6 shows the step-up transmission wheel 3.1 running along the toothing 19.1, the step-up transmission wheel 3.1 here being located approximately at the middle of the elongate opening 18.

[0030] According to FIG. 7, an uppermost tooth 22 of the toothing 20 of the step-up transmission wheel 3.1 has now reached an uppermost tooth 23 of the toothing 19.1. At the same time, an opposite tooth 24 engages under an uppermost tooth 25 of the opposite toothing 19.2. Upon further rotation of the step-up transmission wheel 3.1, the toothing 20 engaging in the toothing 19.2 carries the fork element 15.1 in the opposite direction, as is shown by the arrow 26. FIG. 8 shows the corresponding central position of the step-up transmission wheel 3.1 in the elongate opening 18.

[0031] Finally, the tooth 24 of the toothing 20 of the step-up transmission wheel 3.1 reaches a lower tooth 27 of the toothing 19.1 and the position of use shown in FIG. 5, wherein the opposite tooth 22 again unlatches from the toothing 19.2. The tooth 24 now comes into engagement with the toothing 19.1, as is shown in FIG. 5.

[0032] FIG. 9 shows that the fork element 15 according to the invention can also interact with three pistons. For this purpose, instead of the piston 6.2, two piston rods 5.1 and 5.2 are connected to the fork element 15 via a joint 28. A piston 6.3, 6.4 is provided at the other end of the piston rods 5.1, 5.2, respectively.

[0033] In FIG. 10, the fork element 15 actuates two mutually opposite pairs of pistons 6.3, 6.4 and 6.5, 6.6, wherein the pair 6.5, 6.6 replaces the piston 6.1 and is connected to the fork element 15 via corresponding piston rods 5.3 and 5.4, respectively, and via a joint 28.1.

[0034] However, the process of movement of the arrangement according to FIG. 9 and FIG. 10 corresponds to the details concerning the function of the illustrative embodiment according to FIGS. 5 to 8.

TABLE-US-00001 List of reference signs 1 motor 2 fan 3 step-up transmission wheel 4 output wheel 5 piston rod 6 piston 7 compression chamber 8 valve piece 9 line 10 connection 11 toothed wheel 12 toothed wheel 13 opening 14 toothing 15 fork element 16 side flank 17 connector stub 18 elongate opening 19 toothing 20 toothing of 3.1 21 arrow 22 uppermost tooth of 20 23 uppermost tooth of 19.1 24 tooth of 20 25 uppermost tooth of 19.2 26 arrow 27 lower tooth of 19.1 28 joint 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 A axis of 3.1 P compressor