Synchronous clamping fixture

Abstract

The utility model relates to a synchronous clamping fixture which comprises a base which is provided with a bearing face used for bearing and positioning a workpiece. The two sets of clamping jaws are rotationally arranged on the two opposite sides of the base and used for clamping a workpiece, the jacking column is arranged on the side, away from the bearing face, of the base and used for jacking the workpiece, and the driving assembly is arranged on the side, away from the bearing face, of the base and used for driving the clamping jaws to rotate synchronously and driving the jacking column to ascend and descend. The driving assembly comprises a push rod arranged on the base in a sliding mode and a driving unit driving the push rod to move, the push rod is in transmission connection with the clamping jaw, and the push rod abuts against the jacking column. According to the synchronous clamping fixture designed by the utility model, the workpiece can be loosened and jacked in a linkage manner, and the synchronous clamping fixture is simple in structure and higher in efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a synchronous clamping clamp. Background Art

[0002] A clamp is a commonly used auxiliary tool in the field of mechanical processing and manufacturing. It is mainly used to clamp the workpiece to keep it fixed, and then use processing equipment to process the workpiece to improve the processing accuracy. For flat workpieces, they are usually positioned and placed on the bearing surface of the clamp, and then the clamping claws are used to fasten the workpiece to the bearing surface from all sides. After processing is completed, it is removed by manual or mechanical devices. Since the workpiece is in contact with the bearing surface and is not convenient for direct removal, it is necessary to lift the workpiece before picking it up. In the existing technology, the lifting of the workpiece and the rotation of the clamping claw are controlled by different mechanisms respectively. The structure is complex and the two actions cannot be linked, which results in low efficiency. Utility Model Content

[0003] In view of the above problems, the purpose of the present invention is to design a synchronous clamping fixture that can realize the linkage of loosening and lifting of the workpiece, has a simple structure and high efficiency.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A synchronous clamping fixture is designed, including a base, the base is provided with a bearing surface for bearing and positioning a workpiece, and also includes two groups of clamping jaws rotatably arranged on opposite sides of the base for clamping the workpiece, a lifting column arranged on the side of the base away from the bearing surface for lifting the workpiece, and a driving assembly arranged on the side of the base away from the bearing surface for driving the clamping jaws to rotate synchronously and the lifting column to rise and fall; the driving assembly includes a push rod slidably arranged on the base, and a driving unit that drives the push rod to move, the push rod is transmission-connected to the clamping jaws, and the push rod abuts against the lifting column.

[0006] The synchronous clamping fixture designed in this scheme realizes the functions of fastening and releasing the workpiece, and at the same time, it can automatically lift the workpiece and separate it from the bearing surface of the base after the workpiece is released, so as to facilitate the workpiece to be picked up. Specifically, two sets of jaws are respectively provided on opposite sides of the base, and the jaws are hinged to the side of the base through a pin; at the same time, the jaws are connected to the push rod, and the driving unit drives the push rod to move and drive the jaws to rotate around the pin, thereby realizing the clamping and releasing of the workpiece by the jaws. In addition, a through hole is provided on the base, and a lifting column is provided at the position of the through hole. The lifting column is in contact with the push rod. During the movement of the push rod, the push rod can gradually squeeze the lifting column to make it rise and pass through the through hole of the base to contact the back of the workpiece, thereby gradually lifting the workpiece. The specific operation process of the clamp is as follows: the drive unit drives the push rod to move, causing the clamping jaw to rotate a certain angle to disengage from the workpiece. At this time, the lifting column is lifted but does not exceed the through-hole of the base. The push rod continues to move, the clamping jaw continues to rotate, the lifting column contacts the workpiece and lifts it up, and the workpiece is removed manually or mechanically. When installing the workpiece to be processed, the drive unit drives the push rod to move in the opposite direction, the lifting column drops into the through-hole, and the clamping jaw rotates in the opposite direction a certain angle but not to the clamping position. A manual or mechanical device places and positions the workpiece to be processed on the bearing surface. The drive unit then continues to drive the push rod in the opposite direction, and the clamping jaw rotates in the opposite direction until the workpiece is clamped. The above design realizes the linkage between the clamping jaw releasing the workpiece and the lifting column lifting the workpiece, without the need for two sets of drive devices for control. The structure is simple and the efficiency is high.

[0007] Furthermore, two push rods are provided, and two lifting columns are provided. The two push rods are respectively connected to the two groups of clamps in a transmission manner, and the two push rods are respectively in contact with the two lifting columns.

[0008] Two push rods and two lifting columns are respectively provided, which are used in conjunction with two sets of clamping jaws to form a linkage mechanism located on opposite sides of the base, ensuring the stability and reliability of the clamping jaws rotating and the lifting of the workpiece.

[0009] Furthermore, the driving unit includes a driving rod rotatably arranged on the base, and the outer periphery of the two ends of the driving rod is provided with two sections of threads with opposite rotation directions. The two push rods are respectively threadedly connected to the two ends of the driving rod. The rotation of the driving rod can drive the two push rods to move away or closer synchronously.

[0010] The driving rod is rotatably mounted on the base using a bearing seat. Two ends of the driving rod are provided with two sections of threads with opposite rotation directions. The push rod is provided with a threaded hole that engages with the threads. After the push rod is sleeved on the driving rod, smooth movement is achieved through the threaded transmission structure.

[0011] Furthermore, the driving unit further comprises a driving member, an output shaft of the driving member is connected to a worm, and the driving rod is sleeved with a gear meshing with the worm.

[0012] The driving part can be a driving motor, a worm is installed on the rotating shaft of the driving motor, and a gear meshing with the worm is set between the two sections of the driving rod thread. The driving motor drives the worm to rotate and then drives the gear to rotate, thereby realizing the forward and reverse rotation of the driving rod.

[0013] Furthermore, the lifting column includes a lifting portion that can contact the workpiece, connecting portions located on both sides of the lifting portion and elastically connected to the base, and an abutting portion that contacts the push rod.

[0014] The connecting parts on either side of the lifting part are elastically connected to the base via elastic members. When the lifting column is raised, the elastic members are compressed, generating an elastic force between the connecting parts and the base. This prevents the lifting column from becoming stuck and unable to fall back due to the weight of the lifting column when it is lowered. The abutment part that contacts the push rod can be a roller component. When it moves in contact with the push rod, it converts sliding friction into rolling friction, thereby reducing wear on the push rod and the abutment part.

[0015] Furthermore, the connecting portion is provided with a guide hole, the base is provided with a guide column passing through the guide hole, a spring is sleeved on the outer periphery of the guide column, and two ends of the spring are respectively in contact with the base and the connecting portion.

[0016] A guide column is designed on the base, and the jacking column is guided by the guide column and the guide hole when it is raised or lowered, so that the guide column can move smoothly. At the same time, the elastic member between the connecting part and the base can be a spring. The spring is sleeved on the guide column, and the two ends of the spring are respectively in contact with the base and the connecting part, thereby realizing an elastic connection between the base and the connecting part of the jacking column.

[0017] Furthermore, the push rod includes a horizontally arranged first abutment surface and an inclinedly arranged second abutment surface. When the lifting column is not lifted, the abutment portion contacts the first abutment surface. When the lifting column is lifted, the abutment portion contacts the second abutment surface.

[0018] The first abutment surface of the push rod plays the role of bearing and supporting the jacking column. During the movement of the push rod, the abutment part rolls on the first abutment surface, and the jacking column remains stationary. When the push rod moves, the second abutment surface contacts the abutment part, and the second abutment surface squeezes the abutment part, causing the jacking column to move upward.

[0019] Furthermore, each group of the clamping jaws includes two claw heads, a transmission rod connected to the claw heads and facing the push rod, and the transmission rod is in transmission connection with the push rod.

[0020] The clamping jaws include two claw heads, which are connected by a connecting rod. The claw heads are set on the side of the base through a pin shaft. Each claw head is connected to a push rod through a transmission rod. The push rod drives the transmission rod to rotate during the movement, thereby realizing the synchronous rotation of the two claw heads around the pin shaft.

[0021] Furthermore, the push rod further includes a first guide groove, and the transmission rod is provided with a rotating block embedded in the first guide groove. The movement of the push rod drives the rotating block to slide in the first guide groove, thereby driving the claw head to rotate.

[0022] According to the rotation direction of the clamping jaw, a first guide groove is opened on the push rod. During the movement of the push rod, the rotating block on the transmission rod can slide in the first guide groove, thereby realizing the rotation of the clamping jaw.

[0023] Furthermore, the base is provided with two groups of guide plates, which are symmetrically arranged on both sides of the driving rod. The guide plates are provided with second guide grooves, and the push rod is provided with a guide block embedded in the second guide groove.

[0024] The guide plate is arranged on the base, which not only plays a guiding role, but also enables the push rod to move smoothly under the drive of the drive unit; at the same time, the guide plate supports the push rod, sharing the force of the push rod on the drive rod and avoiding deformation of the drive rod.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] The synchronous clamping fixture designed in this scheme realizes the functions of fastening and releasing the workpiece, and at the same time, it can automatically lift the workpiece and separate it from the bearing surface of the base after the workpiece is released, so as to facilitate the workpiece to be picked up. Specifically, two sets of jaws are respectively provided on opposite sides of the base, and the jaws are hinged to the side of the base through a pin; at the same time, the jaws are connected to the push rod, and the driving unit drives the push rod to move and drive the jaws to rotate around the pin, thereby realizing the clamping and releasing of the workpiece by the jaws. In addition, a through hole is provided on the base, and a lifting column is provided at the position of the through hole. The lifting column is in contact with the push rod. During the movement of the push rod, the push rod can gradually squeeze the lifting column to make it rise and pass through the through hole of the base to contact the back of the workpiece, thereby gradually lifting the workpiece. The specific operation process of the clamp is as follows: the drive unit drives the push rod to move, causing the clamping jaw to rotate a certain angle to disengage from the workpiece. At this time, the lifting column is lifted but does not exceed the through-hole of the base. The push rod continues to move, the clamping jaw continues to rotate, the lifting column contacts the workpiece and lifts it up, and the workpiece is removed manually or mechanically. When installing the workpiece to be processed, the drive unit drives the push rod to move in the opposite direction, the lifting column drops into the through-hole, and the clamping jaw rotates in the opposite direction a certain angle but not to the clamping position. A manual or mechanical device places and positions the workpiece to be processed on the bearing surface. The drive unit then continues to drive the push rod in the opposite direction, and the clamping jaw rotates in the opposite direction until the workpiece is clamped. The above design realizes the linkage between the clamping jaw releasing the workpiece and the lifting column lifting the workpiece, without the need for two sets of drive devices for control. The structure is simple and the efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1This is a structural diagram of a synchronous clamping fixture according to an embodiment of the present invention.

[0028] Figure 2 This is a structural diagram of the synchronous clamping fixture from the bottom perspective according to an embodiment of the present invention.

[0029] Figure 3 for Figure 2 A partial enlarged view of middle A.

[0030] Figure 4 This is a structural diagram of a clamping jaw according to an embodiment of the present invention.

[0031] Figure 5 This is a structural diagram of a jacking column according to an embodiment of the present invention.

[0032] Figure 6 This is a structural diagram of a push rod according to an embodiment of the present invention.

[0033] Illustrations: 1. Base; 11. Bearing surface; 12. Guide column; 13. Spring; 14. Guide plate; 15. Second guide groove; 2. Clamp; 21. Claw; 22. Transmission rod; 23. Turn block; 3. Lifting column; 31. Lifting portion; 32. Connecting portion; 33. Abutment portion; 34. Guide hole; 4. Drive assembly; 41. Push rod; 42. Drive unit; 411. First abutment surface; 412. Second abutment surface; 413. First guide groove; 414. Guide block; 421. Drive rod; 422. Drive member; 423. Worm; 424. Gear. DETAILED DESCRIPTION

[0034] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0035] like Figures 1 to 6As shown, this embodiment provides a synchronous clamping fixture, comprising a base 1 having a bearing surface 11 for supporting and positioning a workpiece, two sets of jaws 2 rotatably disposed on opposite sides of the base 1 for clamping the workpiece, a lifting column 3 disposed on the side of the base facing away from the bearing surface for lifting the workpiece, and a drive assembly 4 disposed on the side of the base 1 facing away from the bearing surface for driving the synchronous rotation of the jaws 2 and the elevation of the lifting column 3. The drive assembly 4 includes a push rod 41 slidably disposed on the base 1, the push rod 41 being transmission-connected to the jaws 2 and abutting against the lifting column 3. The movement of the push rod 41 drives the synchronous rotation of the jaws 2 and the coordinated elevation of the lifting column 3. In this embodiment, two push rods 41 and two lifting columns 3 are provided, respectively, and are used in conjunction with the two sets of jaws 2 to form a linkage mechanism located on opposite sides of the base 1, ensuring smooth and reliable rotation of the jaws 2 and lifting of the workpiece. In other possible embodiments, the number of push rods 41 and the number of lifting columns 3 may be one, which can also achieve the same function. The movement of the push rod 41 is achieved by the driving unit 42. The driving unit 42 includes a driving rod 421 and a driving member 422 rotatably arranged on the base 1. The driving rod 421 is rotatably mounted on the base 1 using a bearing seat. Two ends of the driving rod 421 are provided with two sections of threads with opposite rotation directions. The driving member 422 can adopt a driving motor. A worm 423 is installed on the rotating shaft of the driving motor. A gear 424 engaged with the worm 423 is sleeved between the two sections of threads of the driving rod 421. The driving motor drives the worm 423 to rotate and then drives the gear 424 to rotate, thereby realizing the forward and reverse rotation of the driving rod 421. The two push rods 41 are respectively provided with threaded holes meshing with the threads at both ends of the driving rod 421. The two push rods 41 are sleeved on the driving rod 421 and achieve smooth movement through a threaded transmission structure.

[0036] The synchronous clamping fixture provided in this embodiment realizes the functions of fastening and releasing the workpiece, and at the same time, after the workpiece is released, it can automatically lift the workpiece and separate it from the bearing surface 11 of the base 1, so as to facilitate the workpiece to be picked up. Specifically, two sets of jaws 2 are respectively provided on opposite sides of the base 1, and the jaws 2 are hinged to the side of the base 1 through a pin; at the same time, the jaws 2 are connected to the push rod 41 in a transmission manner, and the driving unit 42 drives the push rod 41 to move and drive the jaws 2 to rotate around the pin, thereby realizing the clamping and releasing of the workpiece by the jaws 2. In addition, a through hole is provided on the base 1, and a lifting column 3 is provided at the position of the through hole. The lifting column 3 is in contact with the push rod 41. During the movement of the push rod 41, the push rod 41 can gradually squeeze the lifting column 3 to make it rise and pass through the through hole of the base 1 to contact the back of the workpiece, thereby gradually lifting the workpiece. The specific operation process of the clamp is as follows: the drive unit 42 drives the push rod 41 to move, driving the clamping jaws 2 to rotate a certain angle to detach from the workpiece. At this time, the lifting column 3 is lifted but does not exceed the through hole of the base 1. The push rod 41 continues to move, the clamping jaws 2 continue to rotate, the lifting column 3 contacts the workpiece and lifts the workpiece, and the workpiece is taken away by a manual or mechanical device; when installing the workpiece to be processed, the drive unit 42 drives the push rod 41 to move in the opposite direction, the lifting column 3 drops into the through hole, the clamping jaws 2 rotate in the opposite direction a certain angle but not to the clamping position, and the workpiece to be processed is placed and positioned on the bearing surface 11 by a manual or mechanical device. Then the drive unit 42 continues to drive the push rod 41 to move in the opposite direction, and the clamping jaws 2 rotate in the opposite direction until the workpiece is clamped. The above design realizes the linkage of the clamping jaws 2 releasing the workpiece and the lifting column 3 lifting the workpiece, without the need for two sets of drive devices for control. The structure is simple and the efficiency is high.

[0037] like Figure 2 and Figure 5 As shown, the jacking column 3 includes a jacking portion 31 that can contact the workpiece, a connecting portion 32 located on both sides of the jacking portion 31 and elastically connected to the base 1, and an abutting portion 33 that contacts the push rod 41. The connecting portion 32 is provided with a guide hole 34, and the base 1 is provided with a guide column 12 passing through the guide hole 34. The outer periphery of the guide column 12 is provided with a spring 13, and the two ends of the spring 13 are respectively in abutment with the base 1 and the connecting portion 32. The guide column 12 is designed on the base 1, and the jacking column 3 is guided by the guide column 12 and the guide hole 34 when it is raised or lowered, so that the jacking column 3 can move smoothly. After the jacking column 3 is lifted, the spring 13 mounted on the guide column 12 is compressed, so that an elastic force is generated between the connecting portion 32 and the base 1, so as to avoid the situation where the jacking column 3 cannot fall back due to gravity alone when it is stuck. The abutting portion 33 in contact with the push rod 41 may be a roller component, which converts sliding friction into rolling friction when abutting and moving with the push rod 41 , thereby reducing wear on the push rod 41 and the abutting portion 33 .

[0038] like Figures 2 to 6As shown, the push rod 41 includes a horizontally arranged first abutting surface 411 and an inclined second abutting surface 412. When the jacking column 3 is not jacked up, the abutting portion 33 contacts the first abutting surface 411. When the jacking column 3 is jacked up, the abutting portion 33 contacts the second abutting surface 412. The first abutting surface 411 of the push rod 41 plays the role of bearing and supporting the jacking column 3. During the movement of the push rod 41, the abutting portion 33 rolls on the first abutting surface 411, and the jacking column 3 remains stationary. When the push rod 41 continues to move, the inclined second abutting surface 412 contacts the abutting portion 33, and the second abutting surface 412 squeezes the abutting portion 33, causing the jacking column 3 to move upward.

[0039] like Figure 1 、 Figure 2 and Figure 4 As shown, each set of jaws 2 includes two claw heads 21 and a transmission rod 22 connected to the claw heads 21 and facing the push rod 41. The two claw heads 21 are connected by a connecting rod and are rotatably mounted on the side of the base 1 via a pin. A rotating block 23 is mounted on the transmission rod 22. A first guide groove 413 is defined on the push rod 41 according to the direction of rotation of the jaws 2. The rotating block 23 is embedded in the first guide groove 413. During the movement of the push rod 41, the rotating block 23 on the transmission rod 22 slides within the first guide groove 413, thereby driving the transmission rod 22 to rotate, thereby achieving synchronous rotation of the two jaws 21 about the pin.

[0040] like Figure 2 and Figure 3 As shown, the base 1 is provided with two sets of guide plates 14, symmetrically arranged on either side of the drive rod 421. The guide plates 14 define second guide grooves 15, and the push rod 41 is provided with guide blocks 414 that fit into the second guide grooves 15. The guide plates 14 provided on the base 1 not only provide guidance but also enable the push rod 41 to move smoothly under the drive of the drive unit 42. Furthermore, the guide plates 14 support the push rod 41, sharing the force exerted on the drive rod 421 and preventing deformation of the drive rod 421.

[0041] In the description of the present invention, it should be understood that terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Therefore, the term "first," "second," and the like may explicitly or implicitly include one or more of the features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A synchronous clamping fixture, comprising a base, wherein the base is provided with a bearing surface for bearing and positioning a workpiece, characterized in that: It also includes two groups of clamping jaws rotatably arranged on opposite sides of the base for clamping the workpiece, a lifting column arranged on the side of the base away from the bearing surface for lifting the workpiece, and a driving assembly arranged on the side of the base away from the bearing surface for driving the clamping jaws to rotate synchronously and the lifting column to rise and fall; the driving assembly includes a push rod slidably arranged on the base, and a driving unit that drives the push rod to move, the push rod is transmission-connected to the clamping jaws, and the push rod abuts against the lifting column.

2. The synchronous clamping fixture according to claim 1, characterized in that: Two push rods are provided, and two lifting columns are provided. The two push rods are respectively connected to the two groups of clamping claws in a transmission manner, and the two push rods are respectively in contact with the two lifting columns.

3. The synchronous clamping fixture according to claim 2, characterized in that: The driving unit includes a driving rod rotatably arranged on the base, and the outer periphery of the two ends of the driving rod is provided with two sections of threads with opposite rotation directions. The two push rods are respectively connected to the two ends of the driving rod through threads. The rotation of the driving rod can drive the two push rods to move away or closer synchronously.

4. The synchronous clamping fixture according to claim 3, characterized in that: The driving unit further comprises a driving member, an output shaft of the driving member is connected to a worm, and the driving rod is sleeved with a gear meshing with the worm.

5. The synchronous clamping fixture according to claim 2, characterized in that: The lifting column includes a lifting portion that can contact the workpiece, connecting portions located on both sides of the lifting portion and elastically connected to the base, and an abutting portion that contacts the push rod.

6. The synchronous clamping fixture according to claim 5, characterized in that: The connecting portion is provided with a guide hole, the base is provided with a guide column passing through the guide hole, a spring is sleeved on the outer periphery of the guide column, and two ends of the spring are respectively in contact with the base and the connecting portion.

7. The synchronous clamping fixture according to claim 5, characterized in that: The push rod includes a first abutment surface arranged horizontally and a second abutment surface arranged obliquely. When the lifting column is not lifted, the abutment portion contacts the first abutment surface. When the lifting column is lifted, the abutment portion contacts the second abutment surface.

8. The synchronous clamping fixture according to claim 2, characterized in that: Each group of the clamping jaws includes two claw heads and a transmission rod connected to the claw heads and facing the push rod, and the transmission rod is in transmission connection with the push rod.

9. The synchronous clamping fixture according to claim 8, characterized in that: The push rod further includes a first guide groove, and the transmission rod is provided with a rotating block embedded in the first guide groove. The movement of the push rod drives the rotating block to slide in the first guide groove, thereby driving the claw head to rotate.

10. The synchronous clamping fixture according to claim 3, characterized in that: The base is provided with two groups of guide plates, which are symmetrically arranged on both sides of the driving rod. The guide plates are provided with second guide grooves, and the push rod is provided with guide blocks embedded in the second guide grooves.

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