The present invention provides an improved release mechanism for clamping tools where problems of thread slipping due to worn out thread can be reduced by the structure of a plunger with a small diameter section and the engagement of the thread shaft is made more secure by the cam action on account of the shape of the plunger. A protrusion extends from a push button on a top portion of the half-threaded nut. Threads are formed on an upper portion of the hole for engaging the threaded shaft. The middle portion of the plunger is made to have a section of small diameter allowing the protrusion to be pushed downward in a normal position and allowing the protrusion to rely on the resilient power of the helical spring to push it upward into the small diameter section.

A portable utility vise device is provided utilizing a clamping assembly having a front elongate frame member, a rear elongate frame member, a left elongate frame member and a right elongate frame member. The left and right elongate frame members may each utilize a clamp bar coupled to an outer side surface thereof. Each clamp bar may have a rear clamp jaw disposed at a distal terminal end thereof. The front elongate frame member may utilize a clamp screw assembly. The portable utility vise device may further utilize a vise assembly coupled to the clamping assembly and having a left vise carriage and a right vise carriage. The left and right vise carriages may each have an elongate channel and a translation screw disposed therein. The left and right vise carriages may each have at least one coupling receptacle structure partially disposed within their respective elongate channels.

A portable utility vise device is provided utilizing a clamping assembly having a front elongate frame member, a rear elongate frame member, a left elongate frame member and a right elongate frame member. The left and right elongate frame members may each utilize a clamp bar coupled to an outer side surface thereof. Each clamp bar may have a rear clamp jaw disposed at a distal terminal end thereof. The front elongate frame member may utilize a clamp screw assembly. The portable utility vise device may further utilize a vise assembly coupled to the clamping assembly and having a left vise carriage and a right vise carriage. The left and right vise carriages may each have an elongate channel and a translation screw disposed therein. The left and right vise carriages may each have at least one coupling receptacle structure partially disposed within their respective elongate channels.

The present disclosure provides a flexible clamping device, which is composed of a housing, a shaft I, a sleeve I, a cylinder, a connector, a shaft II, a clamping spring, a protective pad, a pressure block, a shaft III, a sleeve II and a bottom plate. The bottom plate is provided with two steps on which wheels having different sizes are fixed respectively. When the large-sized wheel is put on the bottom step, the cylinder drives the connector to move right in a plane, the protective pad on the pressure block presses the hub of the wheel, and the function of compacting the large-sized wheel is thus realized; when the small-sized wheel is put on the bottom step, the cylinder drives the connector to continuously move right in the plane, the protective pad on the pressure block presses the hub of the wheel, and the function of compacting the small-sized wheel is thus realized. The flexible clamping device in use can meet the requirement of mixed-line high precision clamping in the wheel burr brushing process, has the characteristics of ideal effect, high efficiency, safety and reliability in work and high degree of automation, and is particularly suitable for batch production on production lines.

A holding apparatus for holding a workpiece, which has a round and/or tubular cross section and is to be machined, in such a way that, in the held state, the workpiece can be rotated in relation to the holding apparatus, having at least two clamping arms, which are mounted in a pivotable manner on a base part and by means of which a clamping force can be exerted onto the workpiece, and having an adjustment mechanism for the clamping arms. Provision is made for the adjustment mechanism to have at least two drivers which are guided in a straight line, it being possible for the clamping arms to be pivoted or the clamping arms being pivoted toward one another by virtue of the movement of the drivers, wherein the drivers are arranged in a manner situated one behind the other as seen transversely in relation to the direction of movement of the drivers. In addition or as an alternative, provision is made for the adjustment mechanism to have a threaded spindle which can be manually operated and/or can be operated by an auxiliary force and which is in detachable threaded engagement with a threaded part, wherein the threaded part is, in the axial direction of the threaded spindle, held fixed in position in relation to the base part on a component of the holding apparatus, in particular on the base part. The invention further comprises an apparatus for machining a workpiece which has a round and/or tubular cross section, the apparatus containing a holding apparatus for the workpiece.

A holding apparatus for holding a workpiece, which has a round and/or tubular cross section and is to be machined, in such a way that, in the held state, the workpiece can be rotated in relation to the holding apparatus, having at least two clamping arms, which are mounted in a pivotable manner on a base part and by means of which a clamping force can be exerted onto the workpiece, and having an adjustment mechanism for the clamping arms. Provision is made for the adjustment mechanism to have at least two drivers which are guided in a straight line, it being possible for the clamping arms to be pivoted or the clamping arms being pivoted toward one another by virtue of the movement of the drivers, wherein the drivers are arranged in a manner situated one behind the other as seen transversely in relation to the direction of movement of the drivers. In addition or as an alternative, provision is made for the adjustment mechanism to have a threaded spindle which can be manually operated and/or can be operated by an auxiliary force and which is in detachable threaded engagement with a threaded part, wherein the threaded part is, in the axial direction of the threaded spindle, held fixed in position in relation to the base part on a component of the holding apparatus, in particular on the base part. The invention further comprises an apparatus for machining a workpiece which has a round and/or tubular cross section, the apparatus containing a holding apparatus for the workpiece.

A stop device having a L shaped mounting bracket secured to a machine vise by a mounting bracket screw, a stop arm having an elongated slot extended within the stop arm and running in a parallel direction to a length of the stop arm, a pivot clamp and pivot clamp screw connected to the elongated slot and attaching the stop arm to the mounting bracket along a length side of a machine vise, the stop arm moveable in both an Y and Z direction and lockable by the pivot clamp, a fixed jaw located at the second end of the stop arm and a stop clamp attached to the second end of the stop arm by stop clamp screw, the stop clamp including an adjustable jaw facing the fixed jaw of the stop arm with the stop clamp screw enabling changes to a distance between the jaws to allow the jaws to hold and support a portion of a stop rod having varying shapes and sizes in a fixed, deform-free condition therebetween.

An embodiment of a vise may include a clamping structure having a first clamping jaw, a second clamping jaw positioned relative to the first clamping jaw, and a quick adjust jaw guide to maintain the first clamping jaw relative to the second clamping jaw. The quick adjust jaw guide may include a driving element to apply a force to move the first clamping jaw relative to the second clamping jaw, wherein the driving element comprises a release structure to release the applied force to facilitate rapid adjustment of the first clamping jaw relative to the second clamping jaw.

An embodiment of a vise may include a clamping structure having a first clamping jaw, a second clamping jaw positioned relative to the first clamping jaw, and a quick adjust jaw guide to maintain the first clamping jaw relative to the second clamping jaw. The quick adjust jaw guide may include a driving element to apply a force to move the first clamping jaw relative to the second clamping jaw, wherein the driving element comprises a release structure to release the applied force to facilitate rapid adjustment of the first clamping jaw relative to the second clamping jaw.

A clamp release mechanism is provided. The clamp includes a body, a shaft slideably coupled to the body, a fixed jaw, and a moveable jaw coupled to the shaft. A locking component actuates between a locked position and an unlocked position. When in the locked position, the locking component biases the shaft to remain stationary with respect to the body. The clamp includes a securing component pivotally coupled to the locking component, and a biasing element that biases the securing components towards the shaft.