Multi-piston type linear guide rail hydraulic clamping device
By using a multi-piston hydraulic clamp in the linear guide rail, using the piston and annular ring to apply pressure to the guide rail, the problems of low positioning accuracy and poor rigidity of the existing linear guide rail are solved, and high-precision and high-rigid rail movement are achieved.
Patent Information
- Application Number
- CN202421981159.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-15
AI Technical Summary
The existing linear guides have low positioning accuracy and poor overall rigidity under the requirements of high accuracy and high rigidity, which cannot meet the requirements of high accuracy and high rigidity.
A multi-piston linear guide hydraulic clamp is adopted, including a housing and a clamp assembly. The clamping groove is provided at the bottom of the housing along its length. The clamping assembly includes a piston, an elastic member and an annular ring. The piston and annular ring are applied to the guide rail through the pressure of hydraulic oil to achieve clamping and positioning.
It improves the positioning accuracy of the guide rail, prevents the guide rail from vibrating, and at the same time enhances the overall rigidity, meeting the requirements of high precision and high rigidity.
Smart Images
Figure CN222977292U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of linear guide rails, in particular to a multi-piston linear guide rail hydraulic clamp. Background Art
[0002] Linear guide rails are used in high-precision or high-speed linear reciprocating motion occasions, and can bear a certain torque, and can achieve high-precision linear motion under high load. The function of the linear guide rail movement is to support and guide the moving parts to make reciprocating linear motion in a given direction. According to the friction property, linear motion guide rails can be divided into sliding friction guide rails, rolling friction guide rails, elastic friction guide rails, fluid friction guide rails, etc.
[0003] Most of the existing linear guide rails are not equipped with guide rail clamps. The positioning of the guide rail depends on the servo motor and the ball screw nut. The existing method has low positioning accuracy and poor overall rigidity, and cannot meet the use requirements of high precision and high rigidity. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a multi-piston linear guide rail hydraulic clamp for clamping the guide rail with high positioning accuracy.
[0005] To achieve the above object, the utility model adopts the following technical solutions:
[0006] A multi-piston linear guide rail hydraulic clamp for clamping the guide rail, comprising:
[0007] A housing, a clamping groove is provided through the bottom of the housing along its length direction, and the guide rail is inserted into the clamping groove;
[0008] A clamping assembly, an oil cavity is provided on one side of the housing along its width direction. The clamping assembly includes a piston and an elastic member arranged in the oil cavity. The piston movably penetrates the oil cavity, and one end of the piston abuts against the guide rail. An annular ring is sleeved on the middle area of the piston, and the annular ring circumferentially abuts against the cavity wall of the oil cavity. The elastic member is sleeved on the piston and abuts against the annular ring and the cavity bottom of the oil cavity.
[0009] Preferably, the multi-piston linear guide rail hydraulic clamp further includes a clamping block, the clamping block is arranged in the clamping groove, one side of the clamping block fits against the groove wall of the clamping groove, and the opposite side fits against one side of the guide rail. One end of the piston is inserted into the clamping block.
[0010] Preferably, an annular groove is circumferentially provided on the outer wall of the annular ring, and a sealing ring is sleeved in the annular groove, and the sealing ring circumferentially abuts against the cavity wall of the oil cavity.
[0011] Preferably, the shell is provided with a plurality of oil chambers on one side opposite to the other along the width direction thereof, and the plurality of oil chambers are connected.
[0012] Preferably, an oil passage port is provided between two adjacent oil chambers, and the two adjacent oil chambers are connected through the oil passage port in the middle thereof.
[0013] Preferably, the shell is provided with an oil inlet hole on one side opposite to the shell in its width direction, and the oil inlet hole is connected to the oil chamber.
[0014] Preferably, the shell is provided with an oil inlet groove on one side opposite to the shell in its width direction, and the oil inlet groove is connected to the oil inlet hole and the oil chamber.
[0015] Preferably, the multi-piston linear guide hydraulic clamp further comprises an end cover, wherein the end cover is embedded in the oil inlet groove and circumferentially abuts against the groove wall of the oil inlet groove, and the oil inlet hole is arranged on the end cover.
[0016] Preferably, one end of the piston facing away from the guide rail is connected to a limiting column, and the limiting column can abut against the end cover.
[0017] Preferably, the clamping groove is provided with another clamping block, one side of the other clamping block is in contact with the groove wall of the clamping groove, and the opposite side is in contact with the other side of the guide rail, and the other side of the shell opposite to its width direction is provided with a plurality of oil chambers along its length direction, the plurality of oil chambers are connected, and the clamping assembly is arranged corresponding to the oil chamber.
[0018] Beneficial effects of the utility model:
[0019] The utility model provides a multi-piston linear guide hydraulic clamp, which is used for clamping the guide rail, and comprises a shell and a clamping assembly. A clamping groove is arranged through the bottom of the shell along its length direction, the guide rail is inserted into the clamping groove, an oil chamber is arranged on the opposite side of the shell along its width direction, the clamping assembly comprises a piston and an elastic member arranged in the oil chamber, the piston is movably inserted into the oil chamber, and one end of the piston abuts against the guide rail, an annular ring is sleeved on the middle area of the piston, the annular ring circumferentially abuts against the cavity wall of the oil chamber, the elastic member is sleeved on the piston, and abuts against the annular ring and the cavity bottom of the oil chamber; the guide rail can be clamped, the positioning accuracy is high, the vibration of the guide rail is prevented, and the rigidity is improved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of a multi-piston linear guide hydraulic clamp provided by an embodiment of the utility model;
[0021] Figure 2 It is a structural schematic diagram of a housing provided by an embodiment of the utility model;
[0022] Figure 3It is a sectional view of a multi-piston linear guide hydraulic clamp provided by an embodiment of the present utility model;
[0023] Figure 4 It is an exploded view of a multi-piston linear guide hydraulic clamp provided by an embodiment of the present utility model.
[0024] In the figure:
[0025] 100, guide rail; 1, housing; 11, clamping groove; 12, oil cavity; 13, oil passage port; 14, oil inlet groove; 21, piston; 22, elastic member; 23, annular ring; 24, sealing ring; 25, limit post; 3, clamping block; 31, inner hole; 4, end cover; 5, oil inlet hole. Specific embodiments
[0026] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of convenience of description, only parts related to the present utility model rather than all structures are shown in the drawings.
[0027] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0028] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is at a lower horizontal height than the second feature.
[0029] In the description of this embodiment, the terms "upper", "lower", "right", and other orientation or positional relationships are based on the orientation or positional relationships shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0030] This embodiment provides a multi-piston linear guide hydraulic clamp, which is used to clamp the guide rail, has high positioning accuracy, can prevent the guide rail from vibrating, and improve rigidity at the same time.
[0031] Please refer to Figures 1 - 4 , a multi-piston linear guide hydraulic clamp includes a housing 1 and a clamping assembly. The clamping assembly is installed on the housing 1 and is used to clamp the guide rail 100 passing through the housing 1.
[0032] Further, a clamping groove 11 is provided through the bottom of the housing 1 along its length direction. The guide rail 100 passes through the clamping groove 11. The clamping assembly is installed on the housing 1 and can abut against the guide rail 100.
[0033] Please refer to Figure 3 and Figure 4 , the clamping assembly includes a piston 21 and an elastic member 22. An oil chamber 12 is provided on one side of the housing 1 opposite to its width direction. The piston 21 and the elastic member 22 are both arranged in the oil chamber 12. Specifically, the piston 21 movably passes through the oil chamber 12, and one end of it abuts against the guide rail 100. A ring-shaped ring 23 is sleeved on the middle area of the piston 21. The ring-shaped ring 23 circumferentially abuts against the wall of the oil chamber 12. The elastic member 22 is sleeved on the piston 21 and abuts against the ring-shaped ring 23 and the bottom of the oil chamber 12. Inject hydraulic oil into the oil chamber 12 from one side of the housing 1. As the injection amount increases, it pushes the ring-shaped ring 23 and the piston 21 to move. At this time, the elastic member 22 is in a compressed state, and one end of the piston 21 exerts pressure on the guide rail 100, playing a role in clamping the guide rail 100; stop injecting hydraulic oil, and the elastic member 22 releases elastic potential energy, driving the ring-shaped ring 23 and the piston 21 to return to their original positions.
[0034] Preferably, an annular groove is provided circumferentially on the outer wall of the ring-shaped ring 23, and a sealing ring 24 is sleeved in the annular groove. And the sealing ring 24 circumferentially abuts against the wall of the oil chamber 12. On the one hand, it plays a role in sealing the oil chamber 12, and on the other hand, it does not affect the movement of the ring-shaped ring 23 in the oil chamber 12.
[0035] Further preferably, the elastic member 22 in this embodiment can be selected as a spring.
[0036] Further, a multi-piston linear guide hydraulic clamp also includes a clamping block 3. The clamping block 3 is arranged in the clamping groove 11, and one side of the clamping block 3 is attached to the groove wall of the clamping groove 11, and the opposite side of the clamping block 3 is attached to one side of the guide rail 100. One end of the piston 21 is inserted into the clamping block 3. For example, the clamping block 3 is provided with an inner hole 31, and one end of the piston 21 passes through the inner hole 31 and abuts against the bottom of the inner hole 31.
[0037] Preferably, the clamping block 3 is arranged along the length direction of the housing 1 to increase the force application range to the guide rail 100, thereby improving the positioning accuracy of the guide rail 100.
[0038] Inject hydraulic oil into the oil cavity 12 from one side of the housing 1. As the injection amount increases, the annular ring 23 and the piston 21 are pushed to move. At this time, the elastic member 22 is in a compressed state, and one end of the piston 21 extends into the inner hole 31 of the clamping block 3 and abuts against the bottom of the inner hole 31. The piston 21 pushes the clamping block 3, and then the clamping block 3 applies pressure to the guide rail 100, playing a clamping role on the guide rail 100; stop injecting hydraulic oil, the elastic member 22 releases elastic potential energy, driving the annular ring 23 and the piston 21 to return to their original positions, and the clamping block 3 releases the guide rail 100.
[0039] Preferably, on the opposite side of the housing 1 along its width direction, a plurality of oil cavities 12 are provided, and the plurality of oil cavities 12 communicate with each other. Appropriately, the clamping assemblies are arranged in one-to-one correspondence with the oil cavities 12. A piston 21, an elastic member 22 and an annular ring 23 are arranged in each oil cavity 12, and the clamping block 3 is correspondingly provided with a plurality of inner holes 31. Inject hydraulic oil into the oil cavity 12 from one side of the housing 1. The hydraulic oil enters each oil cavity 12. As the injection amount increases, the annular ring 23 and the piston 21 in each oil cavity 12 both move closer to the guide rail 100, compressing the elastic member 22. One ends of the plurality of pistons 21 respectively extend into the corresponding inner holes 31 of the clamping block 3 and abut against the bottoms of the inner holes 31. The plurality of pistons 21 all push the clamping block 3, thereby improving the uniformity of the pressure applied by the clamping block 3 to the guide rail 100, playing a clamping role on the guide rail 100; stop injecting hydraulic oil, the elastic member 22 releases elastic potential energy, driving the annular ring 23 and the piston 21 to return to their original positions, and the clamping block 3 releases the guide rail 100.
[0040] Preferably, the plurality of oil cavities 12 are arranged at intervals along the length direction of the housing 1.
[0041] For example, please refer to Figure 2 , an oil passage 13 is provided between adjacent two oil cavities 12, and the adjacent two oil cavities 12 are communicated through the oil passage 13 in the middle of them.
[0042] Further, an oil inlet hole 5 is provided on the opposite side of the housing 1 along its width direction. The oil inlet hole 5 communicates with the oil cavity 12, and hydraulic oil is injected into the oil cavity 12 through the oil inlet hole 5.
[0043] Furthermore, an oil inlet groove 14 is provided on one side of the housing 1 opposite to the other along the width direction thereof, and the oil inlet groove 14 is connected to the oil inlet hole 5 and the oil chamber 12 to provide an oil filling space.
[0044] A multi-piston linear guide hydraulic clamp provided in this embodiment also includes an end cover 4, which is embedded in the oil inlet groove 14 and circumferentially abuts against the groove wall of the oil inlet groove 14. The oil inlet hole 5 is arranged on the end cover 4. At the same time, the end of the piston 21 away from the guide rail 100 is connected to the limit column 25. The limit column 25 can abut against the end cover 4 to limit the piston 21 and reserve oil inlet space.
[0045] Preferably, when the limiting column 25 abuts against the end cover 4 , there is a gap of 0.3-0.4 mm between the clamping block 3 and the guide rail 100 .
[0046] Furthermore, the clamping groove 11 is also provided with another clamping block 3, one side of the other clamping block 3 is attached to the groove wall of the clamping groove 11, and the opposite side is attached to the other side of the guide rail 100. The other side of the shell 1 opposite to its width direction is also provided with multiple oil chambers 12 spaced apart along its length direction. The multiple oil chambers 12 are connected, and a clamping assembly is correspondingly provided in each oil chamber 12. Hydraulic oil is injected into the oil chamber 12 from the other side of the housing 1 opposite to the housing in its width direction. The hydraulic oil enters each oil chamber 12. As the injection amount increases, the annular ring 23 and the piston 21 in each oil chamber 12 move closer to the guide rail 100, compressing the elastic member 22. One ends of the multiple pistons 21 respectively extend into the inner holes 31 corresponding to the clamping block 3 and abut against the bottom of the inner hole 31. The multiple pistons 21 all push the clamping block 3, thereby improving the uniformity of the pressure applied by the clamping block 3 to the guide rail 100, thereby clamping the guide rail 100. Stop injecting hydraulic oil, the elastic member 22 releases its elastic potential energy, drives the annular ring 23 and the piston 21 to return to their original positions, and the clamping block 3 releases the guide rail 100.
[0047] By arranging two clamping blocks 3 on both sides of the clamping groove 11 , the securing effect of the guide rail 100 is ensured and the positioning accuracy of the guide rail 100 is improved.
[0048] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A multi-piston linear guide hydraulic clamp for clamping a guide rail (100), characterized in that: include: A housing (1), wherein a clamping groove (11) is provided through the bottom of the housing (1) along the length direction thereof, and the guide rail (100) is provided in the clamping groove (11); A clamping assembly, wherein an oil chamber (12) is arranged on one side of the housing (1) opposite to the other in the width direction thereof, and the clamping assembly comprises a piston (21) and an elastic member (22) arranged in the oil chamber (12); the piston (21) is movably arranged in the oil chamber (12), and one end of the piston (21) abuts against the guide rail (100); an annular ring (23) is sleeved in the middle area of the piston (21), and the annular ring (23) circumferentially abuts against the cavity wall of the oil chamber (12); the elastic member (22) is sleeved on the piston (21) and abuts against the annular ring (23) and the cavity bottom of the oil chamber (12).
2. A multi-piston linear guide hydraulic clamp according to claim 1, characterized in that: The multi-piston linear guide hydraulic clamp also includes a clamping block (3), wherein the clamping block (3) is arranged in the clamping groove (11), and one side of the clamping block is in contact with the groove wall of the clamping groove (11), and the opposite side is in contact with one side of the guide rail (100), and one end of the piston (21) is inserted into the clamping block (3).
3. A multi-piston linear guide hydraulic clamp according to claim 1, characterized in that: An annular groove is provided in the circumferential direction of the outer wall of the annular ring (23), a sealing ring (24) is sleeved in the annular groove, and the sealing ring (24) abuts against the cavity wall of the oil cavity (12) in the circumferential direction.
4. A multi-piston linear guide hydraulic clamp according to claim 1, characterized in that: The housing (1) is provided with a plurality of oil chambers (12) on opposite sides along the width direction thereof, and the plurality of oil chambers (12) are connected.
5. A multi-piston linear guide hydraulic clamp according to claim 4, characterized in that: An oil passage port (13) is provided between two adjacent oil chambers (12), and the two adjacent oil chambers (12) are connected via the oil passage port (13) between the two adjacent oil chambers (12).
6. The multi-piston linear guide hydraulic clamp according to claim 1, characterized in that: The housing (1) is provided with an oil inlet hole (5) on one side opposite to the other along the width direction thereof, and the oil inlet hole (5) is connected to the oil chamber (12).
7. A multi-piston linear guide hydraulic clamp according to claim 6, characterized in that: The housing (1) is provided with an oil inlet groove (14) on one side opposite to the other along the width direction thereof, and the oil inlet groove (14) is connected to the oil inlet hole (5) and the oil chamber (12).
8. The multi-piston linear guide hydraulic clamp according to claim 7, characterized in that: The multi-piston linear guide hydraulic clamp further comprises an end cover (4), wherein the end cover (4) is embedded in the oil inlet groove (14) and circumferentially abuts against the groove wall of the oil inlet groove (14), and the oil inlet hole (5) is arranged on the end cover (4).
9. The multi-piston linear guide hydraulic clamp according to claim 8, characterized in that: One end of the piston (21) facing away from the guide rail (100) is connected to a limiting column (25), and the limiting column (25) can abut against the end cover (4).
10. The multi-piston linear guide hydraulic clamp according to claim 2, characterized in that: The clamping groove (11) is provided with another clamping block (3), one side of the other clamping block (3) is in contact with the groove wall of the clamping groove (11), and the opposite side is in contact with the other side of the guide rail (100), and the housing (1) is provided with a plurality of oil chambers (12) along its length direction on the other side opposite to the housing (1) along its width direction, and the plurality of oil chambers (12) are connected, and the clamping assembly is arranged corresponding to the oil chamber (12).