Hydraulic transmission clamp

Abstract

The utility model discloses a hydraulic transmission clamp which comprises a hydraulic driving cylinder and clamping plates, the clamping plates comprise the first clamping plate and the second clamping plate which are symmetrically distributed, and the hydraulic transmission clamp further comprises a base plate. Vertical arms are symmetrically distributed at the two ends of the base plate, the vertical arm at one end supports a first clamping plate, and the vertical arm at the other end is fixedly connected with a fixing plate through a connecting column. The hydraulic driving cylinder is installed on the fixing plate, and the output end of the hydraulic driving cylinder is hinged to the second clamping plate. A hinge guide assembly is further arranged between the second clamping plate and the fixing plate and comprises a first hinge arm, a second hinge arm and a conduction piece. When the clamp is used for fixing and clamping a workpiece, the clamping plate can be allowed to move reversely due to the arrangement of the related hinge mechanism, so that clamping force acting on the workpiece is partially released, and the situation that the workpiece is deformed due to clamping is effectively reduced.

Description

Technical Field

[0001] This utility model relates to hydraulic clamps, and more particularly to a hydraulic transmission clamp. Background Technology

[0002] For the machining of square workpieces such as box-shaped ones, fixtures are usually used to hold and fix the workpiece. Hydraulic fixtures are widely used for workpiece clamping and fixing because they can provide a large clamping force. Hydraulic fixtures are based on hydraulic cylinders to provide the clamping driving force. The hydraulic pump pumps oil into the cylinder to move the piston, which in turn drives the clamping jaws to clamp the workpiece. At the same time, they are equipped with directional valves, pressure control valves, flow control valves, etc., to control the flow direction, pressure and flow rate of hydraulic oil, so as to adjust the clamping force and movement speed of the jaws.

[0003] Currently, hydraulic clamps used for square workpieces such as box-shaped ones typically fix one clamping plate in the clamping jaws and drive the other clamping plate to perform the clamping action by a hydraulic cylinder. The hydraulic cylinder is directly fixed to the clamping plate. However, since the clamping force driven by the hydraulic cylinder is usually large, the fixed connection means that the clamping force is completely applied to the workpiece and cannot be released, which can easily lead to workpiece deformation during clamping and affect the product quality of the workpiece. Utility Model Content

[0004] To address the shortcomings of the aforementioned technologies, this utility model provides a hydraulic transmission clamp.

[0005] To solve the above technical problems, the technical solution adopted by this utility model is: a hydraulic transmission clamp, including a hydraulic drive cylinder and a clamping plate, the clamping plate including a clamping plate one and a clamping plate two symmetrically distributed, and the hydraulic transmission clamp also includes a base plate.

[0006] The base plate has symmetrically distributed vertical arms at both ends. The vertical arm at one end of the base plate is supported by a clamping plate, and the vertical arm at the other end of the base plate is fixedly connected to a fixing plate through a connecting column.

[0007] The hydraulic drive cylinder is mounted on the fixed plate, and the output end of the hydraulic drive cylinder is hinged to the second clamping plate, with the clamping jaws separated by the first clamping plate and the second clamping plate.

[0008] A hinged guide assembly is also provided between the clamping plate 2 and the fixed plate. The hinged guide assembly includes a hinged arm 1, a hinged arm 2 and a transmission component. The transmission component is hinged between the hinged arm 1 and the hinged arm 2. The hinged arm 1 is hinged to the clamping plate 2 at one end, and the hinged arm 2 is hinged to the fixed plate at the other end.

[0009] Preferably, each upright arm is symmetrically provided with side lugs on both sides, and guide rods are installed between the side lugs of the symmetrically distributed upright arms.

[0010] Clamping plate one and clamping plate two are fixed on the sliding sleeve, which is fitted onto the guide rod.

[0011] Preferably, clamping plate one and clamping plate two are both fixed to the end of the sliding sleeve so that the surface of the sliding sleeve has a clamping stop.

[0012] Preferably, a connecting head is formed at the top of the upright arm;

[0013] The upright arm located at one end of the base plate is assembled and connected to the hinge joint on one side of the clamp plate via a connecting head.

[0014] The upright arm located at the other end of the base plate is assembled and connected to the hinge joint on the back of the fixed plate via a connecting head.

[0015] Preferably, the conductive component is an I-shaped component, with a shaft hole opened in the middle of the vertical plate of the conductive component, and a pin is inserted and installed in the shaft hole;

[0016] The guide rod is also fitted with a support block, and the two ends of the pin are connected to the support block respectively.

[0017] Preferably, protective pads are provided on the surfaces of clamping plate one and clamping plate two respectively.

[0018] Preferably, two symmetrically distributed side inserts are fixed to the sides of the plates of clamping plate one and clamping plate two, and a protective pad is inserted between the two side inserts, and the thickness of the protective pad is greater than the width of the side inserts.

[0019] Preferably, a raised slat is formed on the side insert plate, and a slot adapted to the raised slat is formed on the side of the protective pad.

[0020] Preferably, the side plate and the protective pad are connected by screws at the location of the raised platform and the slot.

[0021] This utility model discloses a hydraulic transmission clamp, in which a hydraulic drive cylinder is hinged to a clamping plate, and a foldable and retractable hinged guide assembly is used to achieve a guide support connection. When the workpiece is fixedly clamped at the clamping jaws, the relevant hinge mechanism allows the clamping plate to move in the opposite direction, thereby partially releasing the clamping force acting on the workpiece, effectively reducing the occurrence of workpiece deformation during clamping.

[0022] Furthermore, the clamping plate surface is equipped with elastic protective pads, which can further improve the protection of the clamped workpiece; and the protective pads are consumable parts and are designed to be detachable and replaceable, which has the advantage of convenient replacement. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the hinged guide assembly.

[0025] Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0026] Figure 4 for Figure 3 A schematic diagram of the transmission component of the hinged guide assembly.

[0027] Figure 5 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0028] Figure 6 for Figure 5 A schematic diagram of the structure of either the middle clamping plate one or the middle clamping plate two.

[0029] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point A in the middle.

[0030] In the diagram: 1. Base plate; 2. Vertical arm; 3. Connector; 4. Clamping plate; 4a. Clamping plate one; 4b. Clamping plate two; 5. Sliding sleeve; 6. Guide rod; 7. Hinge guide assembly; 71. Hinge arm one; 72. Transmission component; 73. Hinge arm two; 8. Hydraulic cylinder; 9. Clamping stop; 10. Fixing plate; 11. Side ear seat; 12. Connecting column; 13. Support block; 14. Shaft hole; 15. Protective pad; 17. Raised platform strip; 18. Slot. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] This embodiment discloses a hydraulic transmission clamp, the overall structure of which is as follows: Figure 1 As shown, the main structure includes: a hydraulic drive cylinder 8, a clamping plate 4, a base plate 1, a guide rod 6, and a hinged guide assembly 7.

[0034] Among them, the clamping plate 4 includes a first clamping plate 4a and a second clamping plate 4b that are symmetrically distributed, with clamping openings separated by the first clamping plate 4a and the second clamping plate 4b.

[0035] The base plate 1 serves as the bottom structural support, and upright arms 2 are symmetrically fixed at both ends of the base plate 1.

[0036] The vertical arm 2 provides longitudinal support, and a clamping plate 4a is installed on the vertical arm 2 at one end of the base plate 1. A fixing plate 10 is fixedly connected to the vertical arm 2 at the other end of the base plate 1 via a connecting column 12.

[0037] Preferably, the top end of the upright arm 2 is formed with a connecting head 3, and the upright arm 2 located at one end of the base plate 1 is assembled and connected to the hinge joint on the back side of the clamping plate 4a through the connecting head 3; correspondingly, the upright arm 2 located at the other end of the base plate 1 is assembled and connected to the hinge joint on the back side of the fixing plate 10 through the connecting head 3.

[0038] Thus, the fixing plate 10 is assembled and connected to the connecting head 3 of the vertical arm 2 at one end, and connected to the vertical arm 2 through the connecting column 12 at the other end, so as to realize its fixed setting on the vertical arm 2. This allows the fixing plate 10 to meet the installation setting of the hydraulic drive cylinder 8 on the one hand, and to be used for the installation setting of the hinge guide assembly 7 on the other hand.

[0039] The hydraulic drive cylinder 8 is equipped with a hydraulic control system. The hydraulic drive cylinder 8 is connected to the hydraulic pump of the control system. The hydraulic pump pumps oil into the hydraulic drive cylinder 8, causing the piston to move, which in turn drives the clamping plate 4b to move. The clamping plate 4a then engages with the clamping plate 4b to clamp the workpiece. Simultaneously, the control system is equipped with directional valves, pressure control valves, and flow control valves in the hydraulic oil flow path. The directional valves change the flow direction of the hydraulic oil, thereby enabling the clamping, releasing, and switching of the movement direction of the clamping jaws. The pressure control valves regulate the pressure of the hydraulic oil to adjust the clamping force of the jaws. The flow control valves control the flow rate of the hydraulic oil, thereby adjusting the piston's movement speed. Through the cooperation of the hydraulic drive cylinder 8 and the hydraulic control system, the workpiece clamping operation of the hydraulic transmission fixture is achieved. Since this is existing technology, it will not be described in detail here.

[0040] For clamping plate 4b, it is connected to the output end of hydraulic drive cylinder 8 by a hinge connection. When hydraulic drive cylinder 8 drives clamping plate 4b to cooperate with clamping plate 4a to clamp and fix the workpiece, for plastic or elastic metal workpieces, the clamping force will cause elastic deformation of the workpiece. In order to recover the deformation, the workpiece will exert a reaction force on clamping plate 4b. Due to the hinge structure, this reaction force is released, thereby reducing the deformation of the workpiece in the hydraulic transmission fixture of this embodiment.

[0041] Furthermore, considering that the clamping plate has a certain height, in order to improve the stability of the movable clamping plate 4b, a hinged guide assembly 7 is also provided between the clamping plate 4b and the fixed plate 10.

[0042] like Figure 2As shown, the articulated guide assembly 7 includes a first articulated arm 71, a second articulated arm 73, and a conductor 72. The conductor 72 is hinged between the first articulated arm 71 and the second articulated arm 73. The first articulated arm 71 is hinged to the second clamping plate 4b at one end, and the second articulated arm 73 is hinged to the fixed plate 10 at the other end. The conductor 72 can rotate relative to the first articulated arm 71 and the second articulated arm 73, enabling the entire articulated guide assembly 7 to extend and retract to accommodate the displacement requirements of the second clamping plate 4b.

[0043] Similarly, the connecting head 3 of the clamping plate 4a and the vertical arm 2 is also assembled in a hinged structure, and the clamping pressure is released by the clamping plate 4a on the opposite side of the clamping plate 4b to reduce the deformation of the workpiece.

[0044] In addition, side ear seats 11 are symmetrically fixed on both sides of each vertical arm 2, and guide rods 6 are installed between the symmetrically distributed side ear seats 11 of the vertical arms 2; for clamping plate 1 4a and clamping plate 2 4b, they are both fixedly set on the sliding sleeve 5, and the sliding sleeve 5 is fitted onto the guide rod 6.

[0045] Furthermore, clamping plates 4a and 4b are both fixed to the ends of the sliding sleeve 5 so that the surface of the sliding sleeve 5 has a clamping stop 9 so that clamping plates 4a and 4b can clamp the workpiece.

[0046] Therefore, for the hydraulic transmission fixture disclosed in this embodiment, clamping plate one is the clamping moving end, the hydraulic drive cylinder 8 provides driving force for the displacement and clamping of clamping plate one, the guide rod 6 provides guidance for the displacement movement of clamping plate one, and the hinged guide assembly 7 provides a strengthening and stabilizing effect for the movable clamping plate one; clamping plate two is the fixed end, which works together with clamping plate one driven by hydraulic drive cylinder 8 to clamp and fix the workpiece.

[0047] When clamping plates one and two together hold and fix the workpiece, the clamping stop 9 formed by the sliding sleeve 5 and the clamping plates provides support at the bottom, while clamping plates one and two clamp on the side. For plastic or elastic metal workpieces, elastic deformation will occur when clamping plate one is pressed tightly. In traditional hydraulic clamps, the output end of the hydraulic cylinder is fixedly connected to clamping plate one, causing clamping plate one to remain stable. Prolonged pressure on the workpiece may cause irreversible deformation. However, in the hydraulic transmission clamp of this application, clamping plates one and two are both set with a hinged joint structure. When the workpiece applies a reaction force to clamping plates one and two to recover its deformation, clamping plates one and two are allowed to move slightly in the opposite direction, thereby releasing the compressive force without affecting the stable clamping of the workpiece, thus reducing the probability of workpiece deformation. At the same time, clamping plate one, as the moving end, is provided with a retractable hinged guide assembly 7 to make its movement more stable, further optimizing the performance of this hydraulic transmission clamp.

[0048] Example 2

[0049] This embodiment discloses a hydraulic transmission clamp, which is based on the structure disclosed in Embodiment 1, such as... Figure 3 As shown, a support block 13 is also fitted onto the guide rod 6, such as... Figure 4 As shown, the transmission component 72 of the hinged guide assembly 7 is an I-shaped component. A shaft hole 14 is provided in the middle of the vertical plate of the transmission component. A pin is inserted into the shaft hole 14, and the two ends of the pin are respectively connected to the support block 13.

[0050] As a result, the transmission component 72 rotates around the pin, and the setting of the pin and the support block 13 makes the extension and retraction of the hinge guide assembly 7 more reliable and stable.

[0051] Example 3

[0052] This embodiment discloses a hydraulic transmission clamp, which is based on the structure disclosed in Embodiment 1, such as... Figure 5 As shown, protective pads 15 are respectively provided on the surfaces of clamping plate 1 4a and clamping plate 2 4b. The protective pads 15 are elastic rubber pads. Furthermore, protective protrusions to increase anti-slip properties can be provided on the surface of the protective pads 15.

[0053] like Figure 6 As shown, the protective pad 15 is set using the side insert plate 16. Considering that the protective pad 15 is a vulnerable part, it is set in a detachable manner.

[0054] First, two symmetrically distributed side inserts 16 are fixed on the sides of the plates of the first clamping plate 4a and the second clamping plate 4b, respectively. The two side inserts 16 are used for the insertion of the protective pad 15.

[0055] Secondly, such as Figure 7 As shown, both side plates 16 have raised ridges 17, and correspondingly, the side of the protective pad 15 has a slot 18 that fits the raised ridge 17. When the protective pad 15 is inserted between the two side plates 16, the cooperation between the raised ridge 17 and the slot 18 can play a role in fixing and limiting the position.

[0056] Preferably, the side insert plate 16 and the protective pad 15 are further connected by screws at the locations of the protruding platform 17 and the slot 18, so that the protective pad 15 is stably fixed on the clamping plate 4a or the clamping plate 4b.

[0057] For locking the screw, a hole slightly smaller than the screw diameter is usually pre-drilled in the rubber pad. A strip-shaped hole is made on the protruding slat 17 of the side insert plate 16 corresponding to the hole position. When the protective pad 15 is inserted between the two side insert plates, the hole and the strip-shaped hole are aligned. The washer is put on the screw, and then the screw is locked in by aiming at the hole.

[0058] In addition, the thickness of the protective pad 15 is usually greater than the width of the side insert plate 16, so that the protective pad contacts the workpiece when clamping it.

[0059] Therefore, in the hydraulic transmission fixture disclosed in this embodiment, protective pads with a protective function are installed on the surfaces of clamping plate one and clamping plate two. When clamping the workpiece, the elastic protective pads can reduce frictional damage to the workpiece by the clamping plates, thereby achieving better protection for the workpiece. Furthermore, as a vulnerable part, the protective pads are designed to be detachable and replaceable, which also has the advantage of convenient replacement.

[0060] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A hydraulic transmission clamp comprising a hydraulic drive cylinder (8), a clamp plate (4), the clamp plate (4) comprising a clamp plate one (4a) and a clamp plate two (4b) symmetrically distributed, characterized in that: The hydraulic transmission clamp also includes a base plate (1). The base plate (1) has symmetrically distributed vertical arms (2) at both ends. The vertical arm (2) at one end of the base plate (1) supports a clamping plate (4a), and the vertical arm (2) at the other end of the base plate (1) is fixedly connected to a fixing plate (10) through a connecting column (12). The hydraulic drive cylinder (8) is mounted on the fixed plate (10), and the output end of the hydraulic drive cylinder (8) is hinged to the clamping plate two (4b), and the clamping jaws are separated by the clamping plate one (4a) and the clamping plate two (4b); A hinge guide assembly (7) is also provided between the clamping plate 2 (4b) and the fixing plate (10). The hinge guide assembly (7) includes a hinge arm 1 (71), a hinge arm 2 (73) and a conductor (72). The conductor (72) is hinged between the hinge arm 1 (71) and the hinge arm 2 (73). The hinge arm 1 (71) is hinged to the clamping plate 2 (4b) at one end, and the hinge arm 2 (73) is hinged to the fixing plate (10) at the other end.

2. The hydraulic power clamp of claim 1, wherein: Each of the vertical arms (2) is symmetrically provided with side ear seats (11) on both sides, and guide rods (6) are installed between the side ear seats (11) of the symmetrically distributed vertical arms (2). The first clamp (4a) and the second clamp (4b) are respectively fixed on the sliding sleeve (5), and the sliding sleeve (5) is sleeved on the guide rod (6).

3. The hydraulic power clamp of claim 2, wherein: The clamping plate one (4a) and clamping plate two (4b) are both fixed to the end of the sliding sleeve (5) so that the surface of the sliding sleeve (5) leaves a clamping stop (9).

4. The hydraulic power clamp of claim 3, wherein: The top end of the vertical arm (2) is formed with a connecting head (3); The upright arm (2) located at one end of the base plate (1) is assembled and connected to the hinge joint on the back side of the clamping plate (4a) via the connecting head (3); The upright arm (2) located at the other end of the base plate (1) is assembled and connected to the hinge joint on the back side of the fixing plate (10) via the connecting head (3).

5. The hydraulic power clamp of claim 2 or 4, wherein: The conductive component (72) is an I-shaped component, and a shaft hole (14) is provided in the middle of the vertical plate of the conductive component. A pin is inserted and installed in the shaft hole (14). The guide rod (6) is also fitted with a support block (13), and the two ends of the pin are respectively connected to the support block (13).

6. The hydraulic power clamp of claim 2 or 4, wherein: The surfaces of the first clamp (4a) and the second clamp (4b) are respectively provided with protective pads (15).

7. The hydraulic power clamp of claim 6, wherein: The sides of the clamping plate one (4a) and clamping plate two (4b) are respectively fixed with two symmetrically distributed side inserts (16), and the protective pad (15) is inserted between the two side inserts (16), and the thickness of the protective pad (15) is greater than the width of the side inserts (16).

8. The hydraulic power clamp of claim 7, wherein: The side plate (16) has a raised platform (17) formed thereon, and the side of the protective pad (15) has a slot (18) adapted to the raised platform (17).

9. The hydraulic power clamp of claim 8, wherein: The side plate (16) and the protective pad (15) are locked together by screws at the locations of the raised platform (17) and the slot (18).

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