Clamping device

Abstract

The utility model relates to the technical field of clamping devices, in particular to a clamping device. A clamping device comprises a base and a clamping jaw arranged on the base, and the clamping jaw comprises a first clamping arm, a second clamping arm, a first transmission arm, a second transmission arm and a jacking piece capable of doing reciprocating action. The top piece is provided with a first position and a second position; when the ejection piece is located at the first position, the first transmission arm and the second transmission arm drive the first clamping arm and the second clamping arm to be close to each other; when the ejection piece is located at the second position, the first transmission arm and the second transmission arm drive the first clamping arm and the second clamping arm to be away from each other; the clamping jaw further comprises an elastic piece, one end of the elastic piece acts on the base, and the other end of the elastic piece acts on the ejection piece. In the initial state, the elastic piece can drive the ejection piece to be located at the first position. The utility model provides a clamping device which is not provided with an electric part and is matched with a conveying belt.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clamping devices, in particular to a clamping device. BACKGROUND

[0002] In the processing of products, it is often necessary to use a conveyor belt to transport the products to different processing devices so that the products can be processed by the equipment at that location. Products or workpieces such as syringes are prone to rolling when the conveyor belt moves, so a clamping device needs to be provided on the conveyor belt to clamp the products. In the prior art, the clamping device usually uses an electrical component to drive the clamping jaw to move, but since the conveyor belt is in a continuous moving state, the electrical component is not convenient to wire, so the existing clamping device is difficult to adapt to the conveyor belt. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a clamping device that does not set an electrical component and is suitable for a conveyor belt.

[0004] A clamping device, comprising a base and a clamping jaw provided on the base, the clamping jaw comprising a first clamping arm, a second clamping arm, a first transmission arm, a second transmission arm and a reciprocating top piece; the first transmission arm is hingedly connected to the first clamping arm and the top piece, and the second transmission arm is hingedly connected to the second clamping arm and the top piece; the clamping jaw is provided in multiple, and the multiple clamping jaws are distributed along the length direction of the base.

[0005] The top piece has a first position and a second position; when the top piece is in the first position, the first transmission arm and the second transmission arm drive the first clamping arm and the second clamping arm to approach each other; when the top piece is in the second position, the first transmission arm and the second transmission arm drive the first clamping arm and the second clamping arm to move away from each other; the clamping jaw further comprises a resilient member, one end of the resilient member acting on the base and the other end acting on the top piece; in the initial state, the resilient member can drive the top piece to be in the first position.

[0006] In one embodiment, when the top piece is in the second position, the resilient member is in a compressed state; when the top piece is in the first position, the resilient member is in a reset state.

[0007] In one embodiment, when the top piece is in the first position, the distance between the top piece and the first clamping arm and the second clamping arm is L1; when the top piece is in the second position, the distance between the top piece and the first clamping arm and the second clamping arm is L2; L1 and L2 satisfy the relationship: L1>L2.

[0008] In one of the embodiments, the first clamping arm is provided with a first clamping part at one end away from the first transmission arm, and the second clamping arm is provided with a second clamping part at one end away from the second transmission arm; the first clamping part and / or the second clamping part are provided in plurality, and the first clamping part and the second clamping part are provided in staggered manner.

[0009] In one of the embodiments, the first transmission arm is swingably provided on the base through a first mounting shaft, one end of the first transmission arm is hinged to the first clamping arm, and the other end is hinged to the top piece through a chain piece; the second transmission arm is swingably provided on the base through a second mounting shaft, one end of the second transmission arm is hinged to the second clamping arm, and the other end is hinged to the top piece through a chain piece.

[0010] In one of the embodiments, the first mounting shaft is provided at a middle position of the first transmission arm, and the second mounting shaft is provided at a middle position of the second transmission arm.

[0011] In one of the embodiments, the top piece comprises a top block and a top rod, one end of the top rod is connected to the top block, and the other end is hinged to the first transmission arm and the second transmission arm; the elastic member is sleeved on the top rod, one end of the elastic member acts on the base, and the other end acts on the top block.

[0012] In one of the embodiments, the base is provided with an open slot, and the first transmission arm and the second transmission arm are at least partially located in the open slot; the top rod comprises an inner segment and an outer segment, the inner segment is movably provided on the base, and is partially inserted into the open slot to be connected to the first transmission arm and the second transmission arm; the outer segment extends outside the base and is connected to the top block, and the elastic member is sleeved on the outer segment.

[0013] In one of the embodiments, a bearing member is sleeved on the inner segment; a gasket is sleeved on one end of the outer segment close to the base, one end of the elastic member abuts against the gasket, and the other end abuts against the top block.

[0014] In one of the embodiments, the clamping jaw further comprises a first auxiliary arm and a second auxiliary arm, the first auxiliary arm is provided on the side of the first transmission arm, one end of the first auxiliary arm is hinged to the first clamping arm, and the other end is hinged to the base; the second auxiliary arm is provided on the side of the second transmission arm, one end of the second auxiliary arm is hinged to the second clamping arm, and the other end is hinged to the base.

[0015] Compared with the prior art, the clamping device can limit the top piece at the first position in the initial state by arranging the elastic member, so that the first clamping arm and the second clamping arm are always in the state of approaching each other to clamp the workpiece. When it is needed to release the clamping of the workpiece, only the external force is needed to push the top piece to overcome the elastic force of the elastic member, so that the top piece is in the second position and the workpiece is released. The clamping device does not need to drive the workpiece by the electrical member, avoiding the problem that the electrical member cannot be wired on the conveying belt. Secondly, under the action force of the elastic member, the first clamping arm and the second clamping arm can always clamp the workpiece, ensuring the stability of clamping the workpiece. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The clamping device structure schematic diagram provided by the present application.

[0018] Figure 2 The partial schematic diagram of Figure 1 .

[0019] Figure 3 The clamping device schematic diagram provided by the present application after removing the upper base shielding.

[0020] Figure 4 The partial schematic diagram of Figure 3 .

[0021] Fig. 1, base; 11, open slot; 2, clamping jaw; 21, first clamping arm; 211, first clamping part; 22, second clamping arm; 221, second clamping part; 210, slot; 23, first transmission arm; 24, second transmission arm; 25, top piece; 251, top block; 252, top rod; 253, inner section; 254, outer section; 3, elastic member; 41, first mounting shaft; 42, second mounting shaft; 43, chain piece; 51, bearing member; 52, gasket; 61, first auxiliary arm; 62, second auxiliary arm. DETAILED DESCRIPTION

[0022] In order to make the above objectives, characteristics and advantages of the present application more apparent, more comprehensible, the specific embodiments of the present application are described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] Please refer to Figures 1 to 4 The present application provides a clamping device, comprising a base 1 and a plurality of clamping jaws 2 arranged on the base 1, the plurality of clamping jaws 2 are spaced apart along the length direction of the base 1. Each clamping jaw 2 comprises a first clamping arm 21, a second clamping arm 22, a first transmission arm 23, a second transmission arm 24 and a reciprocating top piece 25. The first transmission arm 23 is hinged to the first clamping arm 21 and the top piece 25 respectively, and the second transmission arm 24 is hinged to the second clamping arm 22 and the top piece 25 respectively. The top piece 25 has a first position and a second position. When the top piece 25 is in the first position, the first transmission arm 23 and the second transmission arm 24 drive the first clamping arm 21 and the second clamping arm 22 to approach each other. When the top piece 25 is in the second position, the first transmission arm 23 and the second transmission arm 24 drive the first clamping arm 21 and the second clamping arm 22 to move away from each other. The clamping jaw 2 further comprises a resilient member 3, one end of the resilient member 3 acting on the base 1, and the other end acting on the top piece 25. In the initial state, the resilient member 3 can drive the top piece 25 to be in the first position.

[0024] It can be understood that during the movement of the clamping device following the conveying belt (i.e. in the initial state), the resilient member 3 can limit the top piece 25 at the first position, keeping the first clamping arm 21 and the second clamping arm 22 always approaching each other, thereby always clamping the workpiece. When it is necessary to release the clamping of the workpiece, only an external force is needed to push the top piece 25 to overcome the elastic force of the resilient member, so that the resilient member 3 deforms, and the top piece 25 moves to the second position, thereby the first clamping arm 21 and the second clamping arm 22 move away from each other, releasing the clamping of the workpiece. The workpiece can be moved to the processing equipment for processing.

[0025] Under this structure, the clamping device does not need to be driven by electrical components to clamp the workpiece, avoiding the problem that electrical components cannot be wired on the conveying belt. Moreover, the overall structure is simple, the equipment investment cost is low, and the failure rate is low. Secondly, under the force of the resilient member 3, the first clamping arm 21 and the second clamping arm 22 can also always clamp the workpiece, ensuring the stability of clamping the workpiece.

[0026] The plurality of clamping jaws 2 can synchronously clamp a plurality of workpieces for conveying, improving work efficiency. Exemplarily, the plurality of clamping jaws 2 are evenly distributed along the length direction of the base 1. The specific number of clamping jaws 2 can be selected according to actual needs, without specific limitation.

[0027] Furthermore, when the top member 25 is in the second position, the elastic member 3 is in a compressed state. When the top member 25 is in the first position, the elastic member 3 is in a reset state. In this case, when an external force is needed to move the top member 25, the elastic member 3 needs to be compressed, and the force that needs to be overcome is relatively large. Therefore, it is less likely that the workpiece will be released due to accidental contact with the top member 25 during the transmission process, thus reducing the failure rate.

[0028] For example, the elastic element 3 is made of spring, rubber, resin, etc., and in this embodiment, a spring is preferred.

[0029] Furthermore, when the top member 25 is in the first position, the distance between the top member 25 and the first clamping arm 21 and the second clamping arm 22 is L1. When the top member 25 is in the second position, the distance between the top member 25 and the first clamping arm 21 and the second clamping arm 22 is L2. L1 and L2 satisfy the relationship: L1 > L2.

[0030] Understandably, when the top member 25 is in the second position, the distance between it and the clamping arm is shorter. Therefore, an external force can be used to push the top member 25 to the second position, while the first position is reset by the elastic member 3. The externally mounted pusher does not need to be connected to the top member 25, making the operation simpler and easier to implement.

[0031] For example, the distance between the top member 25 and the first clamping arm 21 and the second clamping arm 22 refers to the distance between the end of the top member 25 closest to the clamping arm and the end of the clamping arm closest to the top member 25.

[0032] In one embodiment, a first clamping portion 211 is provided on the end of the first clamping arm 21 away from the first transmission arm 23, and a second clamping portion 221 is provided on the end of the second clamping arm 22 away from the second transmission arm 24. Multiple first clamping portions 211 and / or second clamping portions 221 are provided, and the first clamping portions 211 and the second clamping portions 221 are staggered.

[0033] Understandably, the staggered clamping parts can contact different positions on the workpiece, thereby increasing the number of clamping points and improving clamping stability.

[0034] For example, the misalignment of the first clamp 211 and the second clamp 221 is set to be misaligned along the height direction.

[0035] For example, there are two second clamping portions 221, which are arranged vertically. There is one first clamping portion 211, which is located between the two second clamping portions 221 in the height direction.

[0036] Of course, not limited to this, the number of the first clamping part 211 and the second clamping part 221 can be selected according to actual needs, such as the first clamping part 211 is provided as two, and the second clamping part 221 is provided as one. Or the first clamping part 211 and the second clamping part 221 are both provided as two, or even more. Specific will not be listed one by one.

[0037] Preferably, the first clamping part 211 and the second clamping part 221 are respectively provided with arc-shaped grooves 210, which are more suitable for the outer surface of the circular workpiece.

[0038] In an embodiment, the first transmission arm 23 is swingably provided on the base 1 through the first mounting shaft 41, one end of the first transmission arm 23 is hinged with the first clamping arm 21, and the other end is hinged with the top piece 25 through the chain piece 43. The second transmission arm 24 is swingably provided on the base 1 through the second mounting shaft 42, one end of the second transmission arm 24 is hinged with the second clamping arm 22, and the other end is hinged with the top piece 25 through the chain piece 43.

[0039] Understandably, the first transmission arm 23 is swingably provided on the base 1, which means that the first transmission arm 23 can perform lever action with the first mounting shaft 41 as the fulcrum. Under this structure, when the top piece 25 moves, it can more easily drive the end connected with the first clamping arm 21 of the first transmission arm 23 to move, and the operation is more labor-saving. The second transmission arm 24 is swingably provided on the base 1, which means that the second transmission arm 24 can perform lever action with the second mounting shaft 42 as the fulcrum. Under this structure, when the top piece 25 moves, it can more easily drive the end connected with the second clamping arm 22 of the second transmission arm 24 to move, and the operation is more labor-saving.

[0040] Exemplarily, the first mounting shaft 41 adopts rivets, bolts, etc., and is connected on the base 1 after penetrating through the first transmission arm 23. The second mounting shaft 42 adopts rivets, bolts, etc., and is connected on the base 1 after penetrating through the second transmission arm 24.

[0041] As preferred, the first mounting shaft 41 is arranged at the middle position of the first transmission arm 23. The second mounting shaft 42 is arranged at the middle position of the second transmission arm 24. Under this structure, the length of the branch arm connected with the clamping arm and the top piece 25 of the first transmission arm 23 is smaller, and the structure is more stable.

[0042] In an embodiment, the top piece 25 includes a top block 251 and a top rod 252. One end of the top rod 252 is connected with the top block 251, and the other end is hinged with the first transmission arm 23 and the second transmission arm 24. The elastic member 3 is sleeved on the top rod 252, one end acts on the base 1, and the other end acts on the top block 251.

[0043] Understandably, the top block 251 is used to limit the elastic member 3, so as to avoid the elastic member 3 from being separated from the top rod 252, and to improve the tightening effect.

[0044] Exemplarily, the top block 251 and the top rod 252 are an integral structure, convenient to process and not easy to damage.

[0045] In an embodiment, the base 1 is provided with an open slot 11, and the first transmission arm 23 and the second transmission arm 24 are at least partially located in the open slot 11. The top rod 252 comprises an inner section 253 and an outer section 254, the inner section 253 is movably arranged on the base 1 and partially penetrates into the open slot 11 to be connected with the first transmission arm 23 and the second transmission arm 24. The outer section 254 extends out of the base 1 and is connected with the top block 251. The elastic member 3 is sleeved on the outer section 254.

[0046] Understandably, under this structure, the base 1 can play a certain protection role on the connection between the first transmission arm 23, the second transmission arm 24 and the inner section 253, covering them inside to avoid impurities falling into the connection between them, avoid the situation that the top piece 25 cannot be pushed to the second position, and reduce the failure rate.

[0047] Exemplarily, the first transmission arm 23 and the second transmission arm 24 are only partially located in the open slot 11, and the remaining part extends out of the open slot 11 and is connected with the clamping arm. It is ensured that the clamping position will not be blocked by the base 1, and clamping is facilitated.

[0048] Exemplarily, the open slot 11 is a strip-shaped structure and is arranged along the length direction of the base 1. It is ensured that multiple clamping jaws 2 can be protected.

[0049] Further, the inner section 253 is sleeved with a bearing member 51. The outer section 254 is sleeved with a gasket 52 at one end close to the base 1, one end of the elastic member 3 abuts against the gasket 52, and the other end abuts against the top block 251.

[0050] Understandably, the bearing member 51 not only plays a guiding role on the inner section 253, but also can reduce the friction between the inner section 253 and the base 1 when the inner section 253 moves, thereby prolonging the service life. The gasket 52 is arranged, so that the pressure of the elastic member 3 directly acts on the gasket 52 and then on the base 1. The wear occurs on the gasket 52, so that only the gasket 52 needs to be replaced during long-term use, thereby reducing the maintenance cost.

[0051] In an embodiment, the clamping jaw 2 further comprises a first auxiliary arm 61 and a second auxiliary arm 62. The first auxiliary arm 61 is arranged on the side of the first transmission arm 23 and is hingedly connected with the first clamping arm 21 at one end and with the base 1 at the other end. The second auxiliary arm 62 is arranged on the side of the second transmission arm 24 and is hingedly connected with the second clamping arm 22 at one end and with the base 1 at the other end.

[0052] Understandably, the auxiliary arms limit the turning angle of the clamping arms to a certain extent, so as to avoid the clamping arms from being excessively opened and closed, the opening and closing angle is small, and the speed is fast, thereby improving the work efficiency.

[0053] Exemplarily, the first auxiliary arm 61 is arranged on the side of the first transmission arm 23 close to the second transmission arm 24, and the second auxiliary arm 62 is arranged on the side of the second transmission arm 24 close to the first transmission arm 23. The structure is more compact.

[0054] The above-mentioned hinge can be realized by rivets, bolts, pins and the like, and will not be described herein.

[0055] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described herein. However, as long as the combinations of the technical features do not contradict each other, they should be considered as the scope of the present disclosure.

[0056] The above-mentioned embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A clamping device comprising a base (1) and a clamping jaw (2) arranged on the base (1), the clamping jaw (2) comprising a first clamping arm (21), a second clamping arm (22), a first transmission arm (23), a second transmission arm (24) and a reciprocating top piece (25); the first transmission arm (23) is hingedly connected to the first clamping arm (21) and the top piece (25) respectively, and the second transmission arm (24) is hingedly connected to the second clamping arm (22) and the top piece (25) respectively; characterized in that, The clamping jaws (2) are arranged in multiple, and the multiple clamping jaws (2) are arranged at intervals along the length direction of the base (1); The top piece (25) has a first position and a second position; when the top piece (25) is in the first position, the first transmission arm (23) and the second transmission arm (24) drive the first clamping arm (21) and the second clamping arm (22) to move close to each other; when the top piece (25) is in the second position, the first transmission arm (23) and the second transmission arm (24) drive the first clamping arm (21) and the second clamping arm (22) to move away from each other; the clamping jaw (2) further comprises a resilient member (3), one end of the resilient member (3) acts on the base (1), and the other end acts on the top piece (25); in the initial state, the resilient member (3) can drive the top piece (25) to be in the first position.

2. The clamping device of claim 1, wherein When the top piece (25) is in the second position, the resilient member (3) is in a compressed state; when the top piece (25) is in the first position, the resilient member (3) is in a reset state.

3. The clamping device of claim 1, wherein When the top piece (25) is in the first position, the distance between the top piece (25) and the first clamping arm (21) and the second clamping arm (22) is L1; when the top piece (25) is in the second position, the distance between the top piece (25) and the first clamping arm (21) and the second clamping arm (22) is L2; L1 and L2 satisfy the relationship: L1>L2.

4. The clamping device of claim 1, wherein The first clamping arm (21) is provided with a first clamping portion (211) at one end away from the first transmission arm (23), and the second clamping arm (22) is provided with a second clamping portion (221) at one end away from the second transmission arm (24); the first clamping portion (211) and / or the second clamping portion (221) are arranged in multiple, and the first clamping portion (211) and the second clamping portion (221) are arranged in a staggered manner.

5. The clamping device of claim 1, wherein The first transmission arm (23) is swingably arranged on the base (1) through a first mounting shaft (41), one end of the first transmission arm (23) is hinged to the first clamping arm (21), and the other end is hinged to the top piece (25) through a chain piece (43); the second transmission arm (24) is swingably arranged on the base (1) through a second mounting shaft (42), one end of the second transmission arm (24) is hinged to the second clamping arm (22), and the other end is hinged to the top piece (25) through a chain piece (43).

6. The clamping device of claim 5, wherein The first mounting shaft (41) is arranged at a middle position of the first transmission arm (23), and the second mounting shaft (42) is arranged at a middle position of the second transmission arm (24).

7. The clamping device of claim 1, wherein The top piece (25) comprises a top block (251) and a top rod (252), one end of the top rod (252) is connected to the top block (251), and the other end is hinged to the first transmission arm (23) and the second transmission arm (24); the resilient member (3) is sleeved on the top rod (252), and one end acts on the base (1) and the other end acts on the top block (251).

8. The clamping device of claim 7, wherein The base (1) is provided with an open slot (11), the first transmission arm (23) and the second transmission arm (24) are at least partially located in the open slot (11); the top rod (252) comprises an inner section (253) and an outer section (254), the inner section (253) is movably arranged on the base (1) and partially penetrates into the open slot (11) and is connected with the first transmission arm (23) and the second transmission arm (24); the outer section (254) extends out of the base (1) and is connected with the top block (251), and the elastic member (3) is sleeved on the outer section (254).

9. The clamping device of claim 8, wherein A bearing member (51) is sleeved on the inner section (253); a gasket (52) is sleeved on one end of the outer section (254) close to the base (1), one end of the elastic member (3) abuts against the gasket (52), and the other end abuts against the top block (251).

10. The clamping device of claim 1, wherein The clamping jaw (2) further comprises a first auxiliary arm (61) and a second auxiliary arm (62), the first auxiliary arm (61) is arranged on the side of the first transmission arm (23), one end of the first auxiliary arm (61) is hingedly connected with the first clamping arm (21), and the other end is hingedly connected with the base (1); the second auxiliary arm (62) is arranged on the side of the second transmission arm (24), one end of the second auxiliary arm (62) is hingedly connected with the second clamping arm (22), and the other end is hingedly connected with the base (1).

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