Workpiece clamping device

Abstract

The utility model relates to the technical field of workpiece transfer devices, and provides a workpiece clamping device which comprises a supporting plate. At least one first clamping piece is movably arranged on each clamping jaw assembly; and the extension frame is detachably connected to the supporting plate, a second clamping piece is arranged on the extension frame, and the first clamping piece and the second clamping piece are used for fixing the workpiece to the supporting plate. Compared with the prior art, the clamping device has the advantages that the clamping jaw assemblies with the first clamping pieces are movably arranged on the supporting plate, the first clamping pieces are allowed to be adjusted according to the gravity center position of a workpiece, flexible configuration is achieved, and in addition, the extension frame with the second clamping pieces is additionally arranged when needed, so that the clamping device is convenient to use. And the working range of the clamping device is effectively expanded, so that the device can adapt to workpieces of more types and sizes. By means of the design, the complexity and time consumption of assembly and disassembly of production line equipment are reduced, and the workpiece production efficiency and flexibility are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to workpiece transfer device technical field, concretely is a workpiece clamping device. BACKGROUND

[0002] In the automatic production process of workpieces, in order to realize the efficient transfer between different processes, a special conveying device is usually used to carry workpieces. These conveying devices can be mainly divided into two categories according to their working principles: pneumatic clamping type (for example, using cylinder-driven clamping jaws) and adsorption fixing type (such as suction cups). However, the clamping or adsorption end position of most conveying devices on the market is fixed, which means that when the shape of the workpiece remains unchanged but the size changes, it is often necessary to replace the conveying device that is suitable for different sizes of workpieces to ensure stable and reliable carrying effect.

[0003] This mode of operation results in the need for specially designed conveying devices even for workpieces of the same type but different sizes, significantly increasing production costs. Specifically, this not only increases the additional manufacturing costs to accommodate workpieces of various sizes, but also increases the warehousing costs due to the need to store multiple specifications of conveying devices. In addition, frequent replacement of different types of conveying devices also increases the complexity and time consumption of production line equipment disassembly, thereby affecting the overall production efficiency and flexibility. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a workpiece clamping device in view of the current status of the prior art.

[0005] The technical scheme adopted by the utility model to solve the above technical problem is: a workpiece clamping device is proposed, comprising: a support plate;

[0006] A plurality of clamping jaw assemblies are movably arranged on the support plate, and at least one first clamping member is movably arranged on each of the plurality of clamping jaw assemblies, so as to move at least one first clamping member to any position on the end face of the support plate.

[0007] An extension frame is detachably connected to the support plate, and a second clamping member is arranged on the extension frame. The first clamping member and the second clamping member are used to fix the workpiece on the support plate, and the extension frame is used to extend the clamping range of the clamping device.

[0008] In the above-mentioned workpiece clamping device, one end of the support plate is parallelly provided with two first sliding rails, and a first sliding block is movably arranged on each of the two first sliding rails. The clamping jaw assembly is fixed on the first sliding block, so as to movably connect the clamping jaw assembly with the support plate.

[0009] In the workpiece clamping device, each of the clamping jaw assemblies comprises a first connecting plate connected to the first sliding block, a second sliding rail provided on the first connecting plate, a second sliding block movably provided on the second sliding rail, and a first clamping member fixed to the second sliding block and movably provided on the clamping jaw assembly.

[0010] In the workpiece clamping device, a first limiting member is arranged between the first connecting plate and the first sliding rail and is used to control the fixing and loosening of the clamping jaw assembly on the first sliding rail, and a second limiting member is arranged between the first clamping member and the second sliding rail and is used to control the fixing and loosening of the first clamping member on the second sliding rail.

[0011] In the workpiece clamping device, a second connecting plate is further provided, a bolt through hole is provided on the second connecting plate, threaded holes are provided on the support plate and the extension frame, and a bolt is connected to the threaded holes through the bolt through hole, so as to connect the support plate and the extension frame.

[0012] In the workpiece clamping device, the first clamping member and the second clamping member each comprise:

[0013] a base;

[0014] a main body connected to one end of the base, and a gas passage provided in the main body;

[0015] a first gas pipe joint connected to one side of the main body, and an inner space of the first gas pipe joint being in communication with the gas passage;

[0016] a suction cup connected to the main body and used to adsorb the workpiece.

[0017] In the workpiece clamping device, a mounting frame is further provided, and the support plate is elastically connected to the mounting frame, so as to provide buffering when the suction cup contacts the workpiece.

[0018] In the workpiece clamping device, a guide column is provided on the support plate, a guide sleeve is provided on the mounting frame, the guide column is movably inserted into the guide sleeve and is in limiting connection with the guide sleeve, an elastic member is sleeved on the outer side of the guide column, one end of the elastic member abuts against the guide sleeve, and the other end of the elastic member abuts against the support plate.

[0019] In the workpiece clamping device, a second gas pipe joint is provided on the mounting frame, one end of the second gas pipe joint is in communication with a gas source, the first gas pipe joint on the main body is in communication with the other end of the second gas pipe joint, and power is provided for the suction cup to adsorb the workpiece.

[0020] In the workpiece clamping device, the mounting frame is provided with a one-way valve and a pressure detector, the one-way valve is communicated with the first air pipe joint, so that the air pressure in the gas passage is kept unchanged within a predetermined time, and the pressure detector is communicated with the second air pipe joint, so that the pressure in the gas passage is measured.

[0021] Compared with the prior art, the workpiece clamping device has the advantages that the first clamping pieces are movably arranged on the support plate, and the first clamping pieces can be adjusted according to the gravity center positions of workpieces, so that flexible configuration is realized; in addition, the extension frame with the second clamping pieces is additionally arranged when needed, so that the working range of the clamping device is effectively expanded, and the device can adapt to more kinds and sizes of workpieces. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective view of the workpiece clamping device in working of the utility model;

[0023] Figure 2 is Figure 1 a perspective view in another direction;

[0024] Figure 3 is Figure 2 a perspective view of the workpiece clamping device in working of the utility model;

[0025] Figure 4 is a perspective view of the clamping jaw assembly;

[0026] Figure 5 is a perspective view of the first clamping piece;

[0027] Figure 6 is a perspective view of the first limiting piece.

[0028] In the drawings, 1 is a support plate; 2 is a clamping jaw assembly; 3 is a first clamping piece; 4 is an extension frame; 5 is a second clamping piece; 6 is a first sliding rail; 7 is a first sliding block; 8 is a first connecting plate; 9 is a second sliding rail; 10 is a second sliding block; 11 is a first limiting piece; 12 is a second limiting piece; 13 is a second connecting plate; 14 is a bolt through hole; 15 is a threaded hole; 16 is a base; 17 is a main body; 18 is a first air pipe joint; 19 is a suction cup; 20 is a mounting frame; 21 is a guide column; 22 is a guide sleeve; 23 is an elastic piece; 24 is a second air pipe joint; 25 is a pressure detector; 26 is a fixing seat; 27 is a double-headed screw rod; 28 is a handle; 29 is an abutting block. DETAILED DESCRIPTION

[0029] The utility model discloses a specific embodiment as follows and further describes the technical scheme of the utility model in connection with the drawings, but the utility model is not limited to these embodiments.

[0030] A workpiece clamping device comprises a support plate 1, a plurality of clamping jaw assemblies 2 and an extension frame 4.

[0031] Specifically, the plurality of clamping jaw assemblies 2 are movably arranged on the support plate 1, and at least one first clamping piece 3 is movably arranged on each clamping jaw assembly 2, so that the at least one first clamping piece 3 can be moved to any position on the end face of the support plate 1.

[0032] The extension frame 4 is detachably connected to the support plate 1, and a second clamping piece 5 is arranged on the extension frame 4. The first clamping piece 3 and the second clamping piece 5 are used to fix the workpiece on the support plate 1, and the extension frame 4 is used to extend the clamping range of the clamping device.

[0033] Based on the above embodiment, an exemplary structure of the present scheme is shown in Figures 1 to 6 As shown in the figure, two clamping jaw assemblies 2 are movably arranged on the support plate 1, and two first clamping pieces 3 are movably arranged on each clamping jaw assembly 2. For clamping operation of small workpieces, the number of clamping jaw assemblies 2 and first clamping pieces 3 can be reduced to one. For large workpieces, the number of clamping jaw assemblies 2 can be increased to three or more, and the number of first clamping pieces 3 on each clamping jaw assembly 2 can also be increased to three or more accordingly. By movably connecting the clamping jaw assemblies 2 to the support plate 1 and adjustably installing the first clamping pieces 3 on the clamping jaw assemblies 2, the position of the first clamping pieces 3 on the support plate 1 can be flexibly adjusted according to the position of the center of gravity of the workpiece.

[0034] The extension frame 4 is detachably connected to the support plate 1. When the volume of the workpiece is large and the first clamping piece 3 alone cannot stably fix the workpiece, the extension frame 4 is added and the second clamping piece 5 is connected thereto to increase the fixing points of the clamping device on the workpiece, thereby ensuring that the workpiece is more stably fixed on the clamping device. If the first clamping piece 3 can meet the clamping requirements of the workpiece, the extension frame 4 can be removed to simplify the structure.

[0035] The present scheme flexibly configures by movably arranging a plurality of clamping jaw assemblies 2 with first clamping pieces 3 on the support plate 1 and allowing the first clamping pieces 3 to be adjusted according to the position of the center of gravity of the workpiece. In addition, by adding the extension frame 4 with the second clamping piece 5 when needed, the working range of the clamping device is effectively expanded, so that the device can adapt to more types and sizes of workpieces. This design reduces the complexity and time consumption of disassembly and assembly of the production line equipment, and improves the workpiece production efficiency and flexibility.

[0036] Preferably, one end of the support plate 1 is provided with two first sliding rails 6 parallel to each other, and the first sliding rails 6 are movably provided with first sliding blocks 7, and the jaw assembly 2 is fixed on the first sliding blocks 7, so as to movably connect the jaw assembly 2 with the support plate 1, and the sliding rails and the sliding blocks have a guiding function, which can ensure the accuracy of the moving position of the jaw assembly 2.

[0037] Preferably, each jaw assembly 2 comprises a first connecting plate 8 connected to the first sliding block 7, and the first connecting plate 8 is provided with a second sliding rail 9, and the second sliding rail 9 is movably provided with a second sliding block 10, and the first clamping piece 3 is fixed on the second sliding block 10, so as to movably arrange the first clamping piece 3 on the jaw assembly 2.

[0038] Referring to Figure 1 , Figure 3 , Figure 4 and Figure 6 , the first connecting plate 8 and the first sliding rail 6 are provided with a first limiting piece 11, the first limiting piece 11 is used for controlling the fixing and loosening of the jaw assembly 2 on the first sliding rail 6, and the first clamping piece 3 and the second sliding rail 9 are provided with a second limiting piece 12, the second limiting piece 12 is used for controlling the fixing and loosening of the first clamping piece 3 on the second sliding rail 9.

[0039] Specifically, the first limiting piece 11 and the second limiting piece 12 are the same in structure, and each comprises a fixed seat 26, a double-headed screw 27, a handle 28 and two abutting blocks 29. The fixed seat 26 is provided with a sliding groove for the relative movement of the two abutting blocks 29, the two abutting blocks 29 are threadedly connected to the two sides of the double-headed screw 27 along the axial direction, the double-headed screw 27 is rotatably arranged in the fixed seat 26, and the handle 28 is connected to one end of the double-headed screw 27. The two abutting blocks 29 form a limiting space for fixing the first sliding rail 6 or the second sliding rail 9.

[0040] When it is necessary to adjust the position of the jaw assembly 2 on the first sliding rail 6, or to adjust the position of the first clamping piece 3 on the second sliding rail 9, the operation steps are as follows: first, rotate the handle 28 to drive the double-headed screw 27 to rotate in the fixed seat 26, when the double-headed screw 27 rotates, drive the two abutting blocks 29 to move away from each other, so as to loosen the clamping of the first sliding rail 6 or the second sliding rail 9 by the limiting space, according to the specific shape of the workpiece, adjust the position of the jaw assembly 2 or the first clamping piece 3, so as to reach the required position, after the adjustment is completed, reverse rotate the handle 28, so as to reversely rotate the double-headed screw 27, and then drive the two abutting blocks 29 to move close to each other, so as to reduce the limiting space, thereby firmly fixing the jaw assembly 2 on the first sliding rail 6, or firmly fixing the first clamping piece 3 on the second sliding rail 9.

[0041] Preferably, the scheme further comprises a second connecting plate 13, the second connecting plate 13 is provided with a bolt through hole 14, the support plate 1 and the extension frame 4 are both provided with threaded holes 15, the bolt passes through the bolt through hole 14 and is connected on the threaded hole 15, so as to connect the support plate 1 and the extension frame 4, thereby realizing the detachable connection between the extension frame 4 and the support plate 1.

[0042] The first clamping piece 3 and the second clamping piece 5 both comprise a base 16, a main body 17 connected at one end of the base 16, the main body 17 is provided with a gas channel, a first gas pipe joint 18 connected at one side of the main body 17, the inner space of the first gas pipe joint 18 is communicated with the gas channel, and a suction cup 19 connected on the main body 17 for adsorbing the workpiece.

[0043] When the suction cup 19 approaches and contacts the workpiece, the first gas pipe joint 18 guides the compressed gas into the gas channel, thereby forming a negative pressure area between the suction cup 19 and the surface of the workpiece, so that the suction cup 19 can firmly adsorb the workpiece. At this time, the first clamping piece 3 and the second clamping piece 5 cooperate to ensure that the workpiece is stably fixed on the support plate 1.

[0044] Conversely, when the supply of compressed gas into the gas channel is stopped, the negative pressure between the suction cup 19 and the surface of the workpiece gradually disappears, and the workpiece naturally separates from the suction cup 19 under the action of its own gravity, thereby realizing the separation of the workpiece and the support plate 1.

[0045] The scheme further comprises a mounting frame 20, the support plate 1 is elastically connected to the mounting frame 20, so as to provide a buffer when the suction cup 19 contacts the workpiece.

[0046] The mounting frame 20 is used for mounting and fixing the entire clamping device, and is responsible for connecting with the remaining power components (such as air cylinders, oil cylinders, etc.), so as to realize the movement of the clamping device. The support plate 1 and the mounting frame 20 are elastically connected, so as to buffer the damage of the suction cup 19 or the workpiece caused by excessive impact force in the moment when the suction cup 19 contacts the workpiece.

[0047] The support plate 1 is provided with a guide column 21, the mounting frame 20 is provided with a guide sleeve 22, the guide column 21 is movably inserted into the guide sleeve 22 and is limitingly connected with the guide sleeve 22, an elastic element 23 is sleeved outside the guide column 21, one end of the elastic element 23 abuts against the guide sleeve 22, and the other end abuts against the support plate 1.

[0048] The elastic element 23 is preferably a spring. The limiting connection between the guide column 21 and the guide sleeve 22 can be realized by providing a limiting portion at the end of the guide column 21, and the limiting portion and the guide sleeve 22 limit the movement range by movable abutting. Specifically, when the suction cup 19 contacts the workpiece, it will drive the support plate 1 to move towards the mounting frame 20, at this time the movement of the support plate 1 will compress the elastic element 23, thereby providing a buffer effect between the support plate 1 and the mounting frame 20.

[0049] When the chuck 19 adsorbs the workpiece and starts to move against the gravity of the workpiece, the mounting frame 20 moves, and the support plate 1 remains stationary first due to the relative static state with the workpiece. When the limiting part on the guide column 21 is in full abutment with the guide sleeve 22, the mounting frame 20 continues to move to drive the support plate 1 to move. This design can ensure that the support plate 1 does not immediately move with the mounting frame 20 at the initial stage of the chuck 19 adsorbing the workpiece, avoiding damage caused by sudden impact force, and ensuring a subsequent stable and reliable movement process.

[0050] The mounting frame 20 is provided with a second air pipe joint 24, one end of the second air pipe joint 24 is in communication with the gas source, and the other end of the second air pipe joint 24 is in communication with the first air pipe joint 18 on the main body 17, so as to provide power for the chuck 19 to adsorb the workpiece.

[0051] One end of the second air pipe joint 24 is used to connect the first air pipe joint 18 on the first clamping piece 3 and the second clamping piece 5, and the other end is connected to the gas source. Its function is to guide the compressed gas into the gas passage of the first clamping piece 3 and the second clamping piece 5, and provide power for the chuck 19 to adsorb the workpiece.

[0052] The mounting frame 20 is provided with a one-way valve and a pressure detection meter 25, the one-way valve is in communication with the first air pipe joint 18, so as to keep the gas pressure in the gas passage unchanged within a predetermined time, and the pressure detection meter 25 is in communication with the second air pipe joint 24, so as to measure the pressure in the gas passage.

[0053] The pressure detection meter 25 is used to monitor the gas pressure in the gas passage in real time. When the pressure of the compressed gas provided by the gas source is abnormal, the pressure detection meter 25 will issue an alarm to remind the operator. The function of the one-way valve is to keep the gas pressure in the gas passage stable for a period of time when the supply of compressed gas is abnormal, so as to provide valuable time for the operator to handle the abnormal situation when the pressure detection meter 25 issues an alarm. For example, this enables the operator to handle the workpiece on the chuck 19 in time to prevent the workpiece from suddenly falling off the chuck 19 and to avoid possible safety accidents.

[0054] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications will also change accordingly.

[0055] In addition, the descriptions such as "first", "second", "one", etc. in the present application are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0056] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be broadly understood, for example, "fixing" can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0057] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of the present application.

[0058] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the scope defined by the spirit of the present application.

Claims

1. A workpiece gripping device, characterized by, The utility model provides a clamping device for workpiece, including: Supporting plate; Several jaw assemblies, several the jaw assemblies are movably arranged on the supporting plate, and at least one first clamping piece is movably arranged on several the jaw assemblies, so that at least one first clamping piece moves to any position on the end face of the supporting plate; Extension frame is detachably connected on the supporting plate, and the second clamping piece is arranged on the extension frame, and the first clamping piece and the second clamping piece are used to fix the workpiece on the supporting plate, and the extension frame is used to extend the clamping range of the clamping device.

2. A workpiece gripping device as claimed in claim 1, wherein One end of the supporting plate is provided with two first sliding rails in parallel, and a first sliding block is movably arranged on the two first sliding rails, and the jaw assembly is fixed on the first sliding block to movably connect the jaw assembly with the supporting plate.

3. A workpiece gripping device as claimed in claim 2, wherein Each jaw assembly includes a first connecting plate connected to the first sliding block, a second sliding rail provided on the first connecting plate, a second sliding block movably provided on the second sliding rail, and a first clamping piece fixed to the second sliding block to movably arrange the first clamping piece on the jaw assembly.

4. A workpiece gripping device as claimed in claim 3, wherein A first limiting piece is provided between the first connecting plate and the first sliding rail to control the fixation and release of the jaw assembly on the first sliding rail, and a second limiting piece is provided between the first clamping piece and the second sliding rail to control the fixation and release of the first clamping piece on the second sliding rail.

5. A workpiece gripping device as claimed in claim 1, wherein It also includes a second connecting plate provided with a bolt through hole, and the supporting plate and the extension frame are provided with threaded holes, and the bolt passes through the bolt through hole and is connected to the threaded hole to connect the supporting plate and the extension frame.

6. A workpiece gripping device as claimed in claim 1, wherein The first clamping piece and the second clamping piece each include: A base; A main body connected to one end of the base, a gas passage provided in the main body; A first gas pipe joint connected to one side of the main body, the internal space of the first gas pipe joint in communication with the gas passage; A suction cup connected to the main body to adsorb the workpiece.

7. A workpiece gripping device as claimed in claim 6, wherein It also includes a mounting bracket, and the supporting plate is elastically connected to the mounting bracket to provide cushioning when the suction cup contacts the workpiece.

8. A workpiece gripping device as claimed in claim 7, wherein The supporting plate is provided with a guide column, the mounting bracket is provided with a guide sleeve, the guide column is movably inserted into the guide sleeve and is limitingly connected with the guide sleeve, the outer side of the guide column is provided with an elastic member, one end of the elastic member abuts against the guide sleeve, and the other end abuts against the supporting plate.

9. A workpiece gripping device as claimed in claim 7, wherein The mounting bracket is provided with a second gas pipe joint, one end of the second gas pipe joint is in communication with a gas source, the first gas pipe joint on the main body is in communication with the other end of the second gas pipe joint to provide power for the suction cup to adsorb the workpiece.

10. A workpiece gripping device as claimed in claim 9, wherein The mounting bracket is provided with a one-way valve and a pressure detector, the one-way valve is in communication with the first gas pipe joint to keep the gas pressure in the gas passage unchanged within a predetermined time, and the pressure detector is in communication with the second gas pipe joint to measure the pressure in the gas passage.

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