Floating clamping device

Abstract

The utility model belongs to the technical field of mechanical clamps, and provides a floating clamping device. The device comprises at least two hydraulic pumps, the hydraulic pumps are located on the two opposite sides of a workpiece respectively, and the at least two hydraulic pumps are connected through an oil pipe; and the clamping jaws are arranged at the driving ends of the hydraulic pumps, and the hydraulic pumps drive the clamping jaws to move so as to clamp the workpiece. The clamping force applied to the workpiece by the clamping jaws on the two opposite sides of the workpiece is consistent, the positioning center of the clamping jaws on the two opposite sides of the workpiece is floating, the workpiece is prevented from being clamped and deformed, auxiliary clamping of the workpiece is achieved, over-positioning does not occur, and the machining quality of the workpiece is improved.

Description

Technical Field

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

[0002] During machining, the workpiece needs to be positioned and clamped in order to process it. When clamping workpieces with special-shaped structures, such as workpieces with thin-walled flanges, brackets with poor rigidity, ribs, etc., auxiliary clamping of the workpiece's special-shaped structures is required to prevent machining vibration from causing quality problems with the workpiece. However, auxiliary clamping will increase the positioning surface, leading to the problem of over-positioning of the workpiece, causing deformation of the workpiece when clamped. After the machining is completed, the clamping device releases the workpiece, and the workpiece rebounds and deforms, causing unstable and unqualified machining dimensions.

[0003] Therefore, a new solution is needed to solve the above problems. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a floating clamping device for solving the problem in the prior art that the special-shaped structure of the workpiece is difficult to auxiliary clamp and causes deformation of the workpiece.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a floating clamping device, which is specifically configured as follows: it includes at least two hydraulic pumps, which are respectively located on opposite sides of a workpiece, and at least two of the hydraulic pumps are connected by an oil pipe; a clamping jaw, which is arranged on the driving end of each of the hydraulic pumps, and the hydraulic pump drives the clamping jaw to move to clamp the workpiece.

[0006] Optionally, the floating clamping device further comprises a guide member, wherein the guide member is inserted into the two hydraulic pumps arranged opposite to each other and passes through the clamping jaws connected to the two hydraulic pumps, and the clamping jaws are capable of moving along the length direction of the guide member.

[0007] Optionally, the floating clamping device also includes a clamping jaw seat and a guide member, the clamping jaw is connected to the driving end of the hydraulic pump through the clamping jaw seat, the guide member is inserted into the two relatively arranged hydraulic pumps and passes through the clamping jaw seats connected to the two hydraulic pumps, and the clamping jaw seat can move along the length direction of the guide member to drive the clamping jaw to move.

[0008] Optionally, connecting parts are provided at both ends of the guide member to be connected to the hydraulic pump; and a limiting part is also provided on the guide member to limit the distance between the two hydraulic pumps arranged opposite to each other.

[0009] Optionally, the floating clamping device further comprises an elastic member sleeved on the guide member, and the elastic member is located between the two clamping jaws arranged opposite to each other.

[0010] Optionally, more than one guide member is provided, and the elastic member is provided corresponding to the guide member.

[0011] Optionally, the floating clamping device further comprises a one-way valve, and the one-way valve is arranged on the oil pipe.

[0012] Optionally, the floating clamping device further comprises a hydraulic station, wherein one of the hydraulic pumps is provided with a pressure oil inlet, and the hydraulic pump is connected to the hydraulic station via the pressure oil inlet.

[0013] Optionally, the floating clamping device further comprises a mounting member disposed on one of the hydraulic pumps, and is connected to an external processing device via the mounting member.

[0014] Optionally, the mounting member is a screw rod, and two ends of the screw rod are respectively connected to the hydraulic pump and the external processing equipment.

[0015] As described above, the floating clamping device of the utility model has the following beneficial effects:

[0016] By arranging a hydraulic pump and a clamping jaw connected to the hydraulic pump on opposite sides of the workpiece, and connecting the hydraulic pumps by oil pipes, the clamping jaws on opposite sides of the workpiece can apply the same clamping force to the workpiece. When the clamping jaws on opposite sides of the workpiece move to clamp the workpiece, the clamping jaw that first contacts one side of the workpiece will not apply a clamping force to the workpiece, and the clamping jaw that does not contact the other side of the workpiece continues to move toward the workpiece under the drive of the hydraulic pump, so that the positioning center of the clamping jaws on opposite sides of the workpiece is floating, thereby avoiding deformation of the workpiece due to clamping, realizing auxiliary clamping of the workpiece, and avoiding over-positioning, which is beneficial to improving the processing quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic structural diagram of a floating clamping device according to an embodiment of the utility model;

[0018] Figure 2 Shown is a side structural schematic diagram of a floating clamping device according to an embodiment of the utility model;

[0019] Figure 3 Shown is a schematic structural diagram of a guide member according to an embodiment of the utility model;

[0020] Figure 4 Shown is a structural schematic diagram of an application scenario of the floating clamping device of an embodiment of the utility model.

[0021] Description of Reference Numerals

[0022] 1-workpiece; 11-special-shaped structure;

[0023] 2- hydraulic pump; 21- driving end; 22- oil pipe; 23- one-way valve; 24- pressure oil inlet;

[0024] 3- Gripping jaws;

[0025] 4-guide member; 41-connecting portion; 42-limiting portion;

[0026] 5- Gripper seat;

[0027] 6- elastic member;

[0028] 7-Mounting parts;

[0029] 8-External processing equipment. DETAILED DESCRIPTION

[0030] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0031] It should be noted that the diagram provided in the present embodiment only illustrates the basic concept of the present invention in a schematic manner, so the diagram only shows the components related to the present invention rather than drawing according to the number, shape and size of the components during actual implementation. The form, quantity and proportion of each component during actual implementation can be changed at will, and the component layout form may also be more complicated. The structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can implement, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of narration, and are not used to limit the scope of the present invention. The change or adjustment of its relative relationship should also be regarded as the scope of the present invention without substantial change of the technical content.

[0032] like Figure 1 , Figure 2As shown, some embodiments of the present application provide a floating clamping device for auxiliary clamping of the special-shaped structure 11 of the workpiece 1, including at least two hydraulic pumps 2 and a clamping jaw 3 installed on the driving end 21 of each hydraulic pump 2. Among them, at least two hydraulic pumps 2 are respectively located on opposite sides of the special-shaped structure 11 of the workpiece 1, and the at least two hydraulic pumps 2 are connected by an oil pipe 22 so that the pressure between the hydraulic pumps 2 is the same, thereby achieving the same clamping force on both sides of the special-shaped structure 11. When the clamping jaws 3 on the opposite sides of the special-shaped structure 11 of the workpiece 1 move to clamp the special-shaped structure 11, the clamping jaw 3 that first contacts one side of the special-shaped structure 11 will not apply a clamping force to the special-shaped structure 11, and the clamping jaw 3 that does not contact the other side of the special-shaped structure 11 continues to move toward the special-shaped structure 11 under the drive of the hydraulic pump 2, so that the positioning center of the clamping jaws 3 on the opposite sides of the special-shaped structure 11 is floating, thereby preventing the special-shaped structure 11 of the workpiece 1 from being clamped and deformed. The hydraulic pump 2 drives the clamping jaw 3 to move to clamp the special-shaped structure 11 of the workpiece 1 , thereby achieving auxiliary clamping of the special-shaped structure 11 of the workpiece 1 , which is beneficial to improving the processing quality of the workpiece 1 .

[0033] Specifically, when the clamping jaw 3 on one side of the special-shaped structure 11 of the workpiece 1 contacts the special-shaped structure 11 of the workpiece 1, since the workpiece 1 has been fixed by other fixing devices at this time, the special-shaped structure 11 of the workpiece 1 applies a reaction force to the clamping jaw 3 in contact with it, and the clamping force of the clamping jaw 3 in contact with it is less than the reaction force, so that the clamping jaw 3 no longer continues to move toward the special-shaped structure 11 of the workpiece 1 to apply a clamping force thereon. When the clamping jaws 3 on both sides of the special-shaped structure 11 of the workpiece 1 are in contact with it, the hydraulic pump 2 continues to input pressure oil, so that the clamping force of the clamping jaw 3 increases, thereby clamping the special-shaped structure 11 of the workpiece 1. In this process, the position of the special-shaped structure 11 of the workpiece 1 does not change, avoiding over-positioning, and achieving floating clamping of the special-shaped structure 11 of the workpiece 1.

[0034] It should be noted that the number of the hydraulic pumps 2 can be 2, 3, 4, etc., and the number of the hydraulic pumps 2 is preferably set to a multiple of 2 so that the clamping forces on both sides of the workpiece 1 are the same.

[0035] Exemplarily, the driving end 21 of the hydraulic pump 2 is a piston of the hydraulic pump 2 .

[0036] In some embodiments, the guide member 4 is inserted into two hydraulic pumps 2 arranged opposite to each other, and the two hydraulic pumps 2 are connected through the guide member 4. The guide member 4 penetrates the clamping jaws 3 installed on the two hydraulic pumps 2, and the clamping jaws 3 move along the length direction of the guide member 4 under the drive of the hydraulic pumps 2, thereby guiding the movement of the clamping jaws 3.

[0037] In some other embodiments, the clamping jaw 3 is connected to the driving end 21 of the hydraulic pump 2 through the clamping jaw seat 5, the guide member 4 is inserted into two hydraulic pumps 2 arranged opposite to each other, and penetrates the clamping jaw seat 5 installed on the two hydraulic pumps 2, and the clamping jaw seat 5 moves along the length direction of the guide member 4 under the drive of the hydraulic pump 2 to drive the clamping jaw 3 to move along the length direction of the guide member 4. The processing difficulty of the clamping jaw 3 is reduced, thereby reducing the processing cost.

[0038] Figure 3 is a schematic structural diagram of a guide member according to some embodiments of the present application. Figure 3 It can be shown that, exemplarily, both ends of the guide member 4 are provided with a connecting portion 41, and the connecting portion 41 can be set as an external thread. The connecting portion 41 at one end of the guide rod is connected to the hydraulic pump 2 on one side by a thread, and the connecting portion 41 at the other end of the guide rod passes through the hydraulic pump 2 on the other side, and the guide rod and the hydraulic pump 2 on the other side are locked by a locking nut to facilitate maintenance and replacement. A limiting portion 42 is also provided on the guide member 4, and the limiting portion 42 can be set as a limiting step. The limiting step is clamped on the two hydraulic pumps 2 arranged opposite to each other to limit the distance between the two hydraulic pumps 2. When replacing workpieces 1 of different specifications, the distance between the two hydraulic pumps 2 arranged opposite to each other can be adjusted by replacing the guide member 4, thereby improving the versatility of the present application.

[0039] In some embodiments, an elastic member 6 is sleeved on the guide member 4, and the elastic member 6 is located between two clamping jaws 3 arranged opposite to each other. When the two clamping jaws 3 clamp the special-shaped structure 11 of the workpiece 1, the two clamping jaws 3 move relative to each other, and the elastic member 6 is compressed, which acts as a buffer for the clamping jaws 3 clamping the workpiece 1, thereby preventing the workpiece 1 from being deformed. When the workpiece 1 is processed, the hydraulic pump 2 arranged opposite to each other no longer applies the clamping force, and at this time, the restoring force of the elastic member 6 acts on the clamping jaws 3 or the clamping jaw seat 5 arranged opposite to each other, so that the clamping jaws 3 or the clamping jaw seat 5 arranged opposite to each other are moved away from each other, so as to pick up the workpiece 1.

[0040] Specifically, more than one guide member 4 is provided, and 1, 2, 3, 4, etc., can be provided. The elastic member 6 is provided corresponding to the guide member 4, that is, each guide member 4 is provided with an elastic member 6. In order to make the movement of the clamping jaw 3 more stable, the number of the guide members 4 is preferably set to 3.

[0041] Exemplarily, the guide member 4 may be configured as a guide pin or the like.

[0042] Exemplarily, the elastic member 6 may be configured as a spring or the like.

[0043] In some embodiments, in order to stabilize the clamping force of the clamping jaws 3, a one-way valve 23 is provided on the oil pipe 22 to prevent the pressure oil from flowing back.

[0044] In some embodiments, one of the hydraulic pumps 2 is provided with a pressure oil inlet 24, and the hydraulic pump 2 is connected to a hydraulic station (not shown) through the pressure oil inlet 24. The pressure of the hydraulic pump 2 is controlled by the hydraulic station (not shown), that is, the clamping force of the clamping jaws 3 is controlled to avoid deformation of the workpiece 1.

[0045] Figure 4 is a schematic structural diagram of an application scenario of a floating clamping device according to some embodiments of the present application. Figure 4 As shown, in some embodiments, a mounting member 7 is installed on one of the hydraulic pumps 2, and the floating clamping device of the present application is connected to an external processing device of the workpiece 1 through the mounting member 7, thereby improving the versatility of the present application.

[0046] Specifically, the mounting member 7 is a screw rod, and a hydraulic pump 2 and an external processing equipment are respectively installed at both ends of the screw rod, which are locked by a locking nut so that when the external processing equipment processes the workpiece 1, the floating clamping device of the present application can assist in clamping the special-shaped structure 11 of the workpiece 1, thereby improving the processing quality of the workpiece 1.

[0047] To sum up, the utility model provides a floating clamping device, which arranges a hydraulic pump and a clamping jaw connected to the hydraulic pump on opposite sides of the workpiece, and the hydraulic pumps are connected by an oil pipe, so that the clamping forces applied to the workpiece by the clamping jaws on the opposite sides of the workpiece are the same. When the clamping jaws on the opposite sides of the workpiece move to clamp the workpiece, the clamping jaws that first contact one side of the workpiece will not apply a clamping force to the workpiece, and the clamping jaws that are not in contact with the other side of the workpiece continue to move toward the workpiece under the drive of the hydraulic pump, so that the positioning centers of the clamping jaws on the opposite sides of the workpiece are floating, thereby avoiding deformation of the workpiece due to clamping, realizing auxiliary clamping of the workpiece, and no over-positioning occurs, which is beneficial to improving the processing quality of the workpiece.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A floating clamping device, characterized in that: include: At least two hydraulic pumps are provided and are respectively located on opposite sides of the workpiece, and at least two of the hydraulic pumps are connected by an oil pipe; A clamping jaw is arranged on the driving end of each of the hydraulic pumps, and the hydraulic pump drives the clamping jaw to move so as to clamp the workpiece.

2. The floating clamping device according to claim 1, characterized in that: The floating clamping device also includes a guide member, which is inserted into the two hydraulic pumps arranged opposite to each other and passes through the clamping jaws connected to the two hydraulic pumps. The clamping jaws can move along the length direction of the guide member.

3. The floating clamping device according to claim 1, characterized in that: The floating clamping device also includes a clamping jaw seat and a guide member, wherein the clamping jaw is connected to the driving end of the hydraulic pump via the clamping jaw seat, and the guide member is inserted into the two hydraulic pumps arranged opposite to each other and passes through the clamping jaw seats connected to the two hydraulic pumps, and the clamping jaw seat can move along the length direction of the guide member to drive the clamping jaw to move.

4. The floating clamping device according to claim 2 or 3, characterized in that: Both ends of the guide member are provided with connecting parts for connecting with the hydraulic pump; and the guide member is also provided with a limiting part for limiting the distance between the two hydraulic pumps arranged opposite to each other.

5. The floating clamping device according to claim 2 or 3, characterized in that: The floating clamping device also includes an elastic member sleeved on the guide member, and the elastic member is located between the two clamping jaws arranged opposite to each other.

6. The floating clamping device according to claim 5, characterized in that: More than one guide member is provided, and the elastic member is provided corresponding to the guide member.

7. The floating clamping device according to claim 1, characterized in that: The floating clamping device further comprises a one-way valve, and the one-way valve is arranged on the oil pipe.

8. The floating clamping device according to claim 1, characterized in that: The floating clamping device further comprises a hydraulic station, wherein one of the hydraulic pumps is provided with a pressure oil inlet, and the hydraulic pump is connected to the hydraulic station via the pressure oil inlet.

9. The floating clamping device according to claim 1, characterized in that: The floating clamping device further comprises a mounting member disposed on one of the hydraulic pumps and connected to an external processing device via the mounting member.

10. The floating clamping device according to claim 9, characterized in that: The mounting member is a screw rod, and two ends of the screw rod are respectively connected to the hydraulic pump and the external processing equipment.

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