A clamping device

Abstract

The utility model belongs to the automobile assembly manufacturing technical field discloses a clamping device. The clamping device is used for clamping the push rod of push rod nut device, and includes positioning block, down -pressing subassembly, push subassembly and frame, and positioning block is used for supporting push rod, down -pressing subassembly sets up at the top of push rod, and down -pressing subassembly can move to the direction close to push rod, push subassembly sets up below positioning block, and push subassembly can move to the direction close to push rod to push positioning block and push rod and abut, and push rod can be clamped between down -pressing subassembly and positioning block, and frame includes mounting panel, is provided with first sliding slot on the mounting panel, and first sliding slot includes the first side wall and the second side wall of interval setting, and push rod can be located the clearance between first side wall and second side wall, and positioning block is connected in first sliding slot along the second direction sliding, and then avoids the rotation or the shift of push rod when the nut is tightened to push rod, and then generates frictional collision with product or frame, and damages product.

Description

Technical Field

[0001] This utility model relates to the field of automobile assembly and manufacturing technology, and in particular to a clamping device. Background Technology

[0002] The pushrod nut assembly is the core transmission mechanism in an electric linear actuator. It converts the rotary motion of the motor into the linear reciprocating motion of the pushrod, hence it is also known as a "linear transmission nut" or "lead screw nut." This transmission device is widely used in automobile manufacturing, such as in brake system master cylinders, electric tailgate systems, and seat adjustment systems.

[0003] A typical push rod and nut assembly includes a push rod and a nut. During assembly, the push rod is positioned in the limiting groove between the two positioning plates of the fixture. Due to the gap between the push rod and the two positioning plates, the push rod may rotate or move when the nut is tightened onto it, which could cause friction and collision with the product or the machine frame, damaging the product. Utility Model Content

[0004] The purpose of this utility model is to provide a clamping device that can prevent the push rod from rotating or moving when the nut is tightened on it, thereby avoiding friction and collision with the product or frame and damage to the product.

[0005] To achieve this objective, the present invention adopts the following technical solution: A clamping device is provided for clamping a push rod of a push rod and nut assembly. The push rod and nut assembly includes a push rod and a nut, the nut being sleeved on the push rod. The push rod extends along a first direction and is movable along the first direction. The clamping device includes: The positioning block is used to support the push rod; The pressing component is located above the push rod. The pressing component can move towards the push rod and has a clamping state that abuts against the push rod and a releasing state that is separated from the push rod. The upward push assembly is located below the positioning block. It can move towards the push rod to push the positioning block into contact with the push rod. The push rod can then be clamped between the downward press assembly and the positioning block. The frame includes a mounting plate with a first slide groove. The first slide groove includes a first sidewall and a second sidewall spaced apart. A push rod can be located in the gap between the first sidewall and the second sidewall. A positioning block is slidably connected in the first slide groove along a second direction. The first direction and the second direction are perpendicular.

[0006] Preferably, the pressing assembly includes a first driving member, a pressing head, and a pressing plate. The first driving member is fixedly connected to the frame, the pressing head is fixedly connected to the output end of the first driving member, and the pressing plate is connected to the frame. The first driving member can drive the pressing head to move downward in a second direction so as to cause the pressing plate to press the push rod.

[0007] Preferably, both the pressure plate and the positioning block are provided with semi-circular arc-shaped contact surfaces, which can fit together with the push rod so that the pressure plate and the positioning block hold the push rod tightly.

[0008] Preferably, the first driving component is a gas-liquid booster cylinder.

[0009] Preferably, the pressure plate includes a guide hole extending in the second direction, the frame is provided with a blind hole coaxial with the guide hole, and the pressing assembly also includes a guide member, which is sequentially inserted into the guide hole and the blind hole, with one end of the guide member fixedly connected to the pressure plate and the other end slidably connected to the blind hole.

[0010] Preferably, the pressing assembly further includes an elastic element disposed in the blind hole, one end of which is fixedly connected to the bottom of the blind hole, and the other end of which abuts against or is fixedly connected to the guide element.

[0011] Preferably, the push assembly includes a second drive member and a transmission rod. The second drive member is fixedly connected to the frame, and the transmission rod is fixedly connected to the output end of the second drive member. The transmission rod is located in the first slide groove. The second drive member can drive the transmission rod to move upward along the second direction and abut against the positioning block, so as to drive the positioning block to abut against the push rod.

[0012] Preferably, the bottom of the positioning block is provided with a fixing hole, and the transmission rod can move upward in the second direction and be inserted into the fixing hole.

[0013] Preferably, the clamping device further includes a third driving member and a positioning pad. The frame is also provided with a second slide groove extending along a third direction, and the second slide groove is connected to the first slide groove. The positioning pad is located in the second slide groove, the third driving member is located at one end of the second slide groove, and the third driving member is fixedly connected to the frame. The output shaft of the third driving member is fixedly connected to the positioning pad. The third driving member can drive the positioning pad to slide in the second slide groove, so that the positioning pad has an initial state and a supported state. When the positioning pad is in the initial state, the positioning pad is located at one end of the second slide groove near the third driving member. When the positioning pad is in the supported state, the positioning pad is located at the connection between the first slide groove and the second slide groove, and the positioning pad abuts against the positioning block. The first direction, the second direction, and the third direction are perpendicular to each other.

[0014] Preferably, the second driving member is an upward-pushing cylinder; and / or, the third driving member is a side-pushing cylinder.

[0015] The beneficial effects of this utility model are as follows: A clamping device is provided. This device limits the push rod in a third-dimensional direction by means of a first sliding groove provided in the frame. Simultaneously, it includes a positioning block, a pressing component, and an pushing component. The pressing component is positioned above the push rod and can move towards the push rod to abut against it. The pushing component is positioned below the positioning block and can move towards the push rod to push the positioning block against it. This clamps the push rod between the pressing component and the positioning block. The positioning block, pressing component, pushing component, and frame work together to clamp the push rod, thus preventing the push rod from rotating or moving when the nut is tightened, which could cause friction and collision with the product or frame, damaging the product. Attached Figure Description

[0016] Figure 1 This is an isometric view of the clamping device provided by this utility model; Figure 2 This is a schematic diagram of the mounting plate of the clamping device frame provided by this utility model; Figure 3 This is a schematic diagram of the structure of the pressure plate of the clamping device provided by this utility model; Figure 4 This is a cross-sectional view of the positioning block of the clamping device provided by this utility model; Figure 5 This is a partial schematic diagram of the clamping device provided by this utility model.

[0017] In the picture: 1. Positioning block; 11. Contact surface; 12. Fixing hole; 2. Pressing assembly; 21. First driving component; 22. Pressing head; 23. Pressing plate; 24. Guide component; 3. Upward push assembly; 31. Second drive component; 32. Transmission rod; 4. Frame; 41. Mounting plate; 411. Blind hole; 5. First slide rail; 6. Second slide rail; 7. Third drive component; 8. Positioning pad; 9. Push rod. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0019] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0022] Please refer to Figures 1 to 5 This embodiment provides a clamping device for clamping the push rod 9 of a push rod nut assembly. The push rod nut assembly includes a push rod 9 and a nut, with the nut sleeved on the push rod 9. The push rod 9 extends along a first direction and is movable along the first direction. The clamping device includes a positioning block 1, a pressing component 2, an upper pushing component 3, and a frame 4. The positioning block 1 supports the push rod 9. The pressing component 2 is disposed above the push rod 9 and is movable toward the push rod 9. The pressing component 2 has a clamping state abutting against the push rod 9 and a state of separation from the push rod 9. Released state; the upward push component 3 is located below the positioning block 1. The upward push component 3 can move towards the push rod 9 to push the positioning block 1 to abut against the push rod 9. The push rod 9 can be clamped between the downward press component 2 and the positioning block 1. The frame 4 includes a mounting plate 41. The mounting plate 41 is provided with a first slide groove 5. The first slide groove 5 includes a first side wall and a second side wall that are spaced apart. The push rod 9 can be located in the gap between the first side wall and the second side wall. The positioning block 1 is slidably connected to the first slide groove 5 along the second direction. The first direction and the second direction are perpendicular.

[0023] The push rod 9 is limited in the third direction by the first slide groove 5 set on the frame 4. At the same time, the positioning block 1, the pressing component 2 and the pushing component 3 are set. The pressing component 2 is set above the push rod 9 and can move towards the push rod 9 so that the pressing component 2 abuts against the push rod 9. The pushing component 3 is set below the positioning block 1 and can move towards the push rod 9 to push the positioning block 1 to abut against the push rod 9. Thus, the push rod 9 can be clamped between the pressing component 2 and the positioning block 1. The positioning block 1, the pressing component 2, the pushing component 3 and the frame 4 work together to clamp the push rod 9, thereby preventing the push rod 9 from rotating or moving when the nut is tightened on the push rod 9, so as to avoid friction and collision with the product or the frame 4 and damage to the product.

[0024] In this embodiment, one end of the push rod 9 is used to assemble the nut, and the other end of the push rod 9 is provided with a base for mounting the sensor. The clamping device provided in this embodiment can prevent the push rod 9 from rotating or moving when the nut is tightened on the push rod 9, thereby causing friction and collision with the product or frame 4 and damaging the base.

[0025] Alternatively, please refer to Figures 1 to 3 The pressing assembly 2 includes a first driving component 21, a pressing head 22, and a pressing plate 23. The first driving component 21 is fixedly connected to the frame 4, the pressing head 22 is fixedly connected to the output end of the first driving component 21, and the pressing plate 23 is connected to the frame 4. The first driving component 21 can drive the pressing head 22 to move downward in a second direction, thereby causing the pressing plate 23 to press the push rod 9. In this embodiment, the first driving component 21 is a gas-hydraulic booster cylinder. The gas-hydraulic booster cylinder has the characteristics of compact structure and large thrust, and can quickly provide downward pressure to the pressing plate 23, so that the push plate presses the push rod 9 onto the positioning block 1, saving space and improving clamping efficiency.

[0026] Further, please refer to Figure 3 and Figure 4 Both the pressure plate 23 and the positioning block 1 are provided with semi-circular arc-shaped contact surfaces 11. The semi-circular arc-shaped contact surfaces 11 on the pressure plate 23 and the positioning block 1 can jointly fit against the push rod 9, so that the pressure plate 23 and the positioning block 1 tightly hold the push rod 9. With this arrangement, the two semi-circles are joined together to form a complete cylindrical envelope surface, which is completely in contact with the outer peripheral surface of the push rod 9. This provides positioning accuracy and clamping rigidity, while the surface contact allows the clamping force to be distributed over a larger area, avoiding local indentations or plating peeling on the push rod 9, and protecting the outer peripheral surface of the push rod 9.

[0027] Alternatively, please refer to Figure 1 and Figure 3The pressure plate 23 includes a guide hole extending along a second direction. The frame 4 is provided with a blind hole 411 coaxial with the guide hole. The pressing assembly 2 also includes a guide member 24, which passes through the guide hole and the blind hole 411 in sequence. One end of the guide member 24 is fixedly connected to the pressure plate 23, and the other end is slidably connected to the blind hole 411. This configuration allows the guide member 24 and the guide hole to cooperate, providing precise guidance for the pressure plate 23, enabling the pressure plate 23 to move along the second direction and clamp or release the push rod 9. This improves the accuracy of the pressing assembly 2 while avoiding uneven clamping and cylinder rod bending caused by off-center loading, ensuring the stability, accuracy, and reliability of the clamping device. Specifically, the guide member 24 is a guide pin. In other embodiments, the guide member 24 can also be a guide rod.

[0028] Furthermore, the pressing assembly 2 also includes an elastic element (not shown in the figure). The elastic element is disposed in the blind hole 411, with one end fixedly connected to the bottom of the blind hole 411 and the other end abutting against or fixedly connected to the guide member 24. Specifically, the elastic element is a spring. When it is necessary to release the push rod 9, the gas-liquid booster cylinder is closed, the pressure head 22 does not apply force to the pressure plate 23, and under the elastic force of the spring, the pressure plate 23 springs upward to reset, and the contact surface 11 of the pressure plate 23 is no longer in contact with the push rod 9.

[0029] Alternatively, please refer to Figure 1 and Figure 5 The push assembly 3 includes a second drive member 31 and a transmission rod 32. The second drive member 31 is fixedly connected to the frame 4, and the transmission rod 32 is fixedly connected to the output end of the second drive member 31. The transmission rod 32 is located in the first slide groove 5. The second drive member 31 can drive the transmission rod 32 to move upward in the second direction and abut against the positioning block 1, so as to drive the positioning block 1 to abut against the push rod 9. Specifically, the second drive member 31 is an upward push cylinder. The transmission rod 32 directly makes a line contact sliding guide movement in the first slide groove 5 to ensure that the positioning block 1 is pushed up and fits against the push rod 9. Through the joint action of the first drive member 21 and the second drive member 31, the push rod is clamped between the positioning block 1 and the pressure plate 23. At this time, tightening the nut effectively avoids the push rod 9 from rotating or moving, which would cause friction and collision with the product or the frame 4 and damage the product.

[0030] Further, please refer to Figure 4 The bottom of the positioning block 1 is provided with a fixing hole 12, and the transmission rod 32 can move upward along the second direction and insert into the fixing hole 12. With this configuration, the transmission rod 32 is pushed upward and inserted into the fixing hole 12, which avoids slippage between the transmission rod 32 and the positioning block 1 during the upward push, and ensures the accuracy and reliability of the clamping device.

[0031] Alternatively, please refer to Figure 1 and Figure 4The clamping device also includes a third driving member 7 and a positioning pad 8. The frame 4 is also provided with a second slide groove 6 extending along a third direction, and the second slide groove 6 communicates with the first slide groove 5. The positioning pad 8 is located in the second slide groove 6. The third driving member 7 is located at one end of the second slide groove 6 and is fixedly connected to the frame 4. The output shaft of the third driving member 7 is fixedly connected to the positioning pad 8. The third driving member 7 can drive the positioning pad 8 to slide in the second slide groove 6, so that the positioning pad 8 has an initial state and a supported state. When the positioning pad 8 is in the initial state, the positioning pad 8 is located at one end of the second slide groove 6 near the third driving member 7. When the positioning pad 8 is in the supported state, the positioning pad 8 is located at the connection between the first slide groove 5 and the second slide groove 6, and the positioning pad 8 abuts against the positioning block 1. The first direction, the second direction, and the third direction are perpendicular to each other. Specifically, the third driving member 7 is a side-push cylinder.

[0032] Specifically, please refer to Figure 4 The housing of the second driving component 31 abuts against the bottom of the mounting plate 41. When it is necessary to clamp the push rod 9, the second driving component 31 is first controlled to drive the transmission rod 32 to lift the positioning block 1, so that the contact surface 11 of the positioning block 1 fits against the push rod 9, thereby providing support for the push rod 9; then, the third driving component 7 is controlled to push the positioning pad 8 to the connection between the first slide groove 5 and the second slide groove 6, while the second driving component 31 is controlled to retract the transmission rod 32, and the positioning pad 8 replaces the push rod 9 to provide support for the positioning block 1; finally, the first driving component 21 is controlled to press down the pressure plate 23, so that the push rod 9 is clamped between the pressure plate 23 and the positioning block 1, realizing the clamping function. Since the downward pressure of the first driving component 21 is much greater than the upward thrust of the second driving component 31, by setting the positioning pad 8, the transmission rod 32 can be prevented from bending or being damaged under the action of the downward pressure of the first driving component 21, further ensuring the reliability of the clamping device.

[0033] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A clamping device for clamping a push rod (9) of a push rod nut assembly, the push rod nut assembly comprising a push rod (9) and a nut, the nut being sleeved on the push rod (9), the push rod (9) extending along a first direction and movable along the first direction, characterized in that, The clamping device includes: Positioning block (1), the positioning block (1) is used to support the push rod (9); The pressing component (2) is disposed above the push rod (9). The pressing component (2) is movable toward the push rod (9). The pressing component (2) has a clamping state that abuts against the push rod (9) and a loosening state that is separated from the push rod (9). An upward push assembly (3) is disposed below the positioning block (1). The upward push assembly (3) can move towards the push rod (9) to push the positioning block (1) to abut against the push rod (9). The push rod (9) can be clamped between the downward press assembly (2) and the positioning block (1). The frame (4) includes a mounting plate (41) and a first slide groove (5) is provided on the mounting plate (41). The first slide groove (5) includes a first side wall and a second side wall spaced apart. The push rod (9) can be located in the gap between the first side wall and the second side wall. The positioning block (1) is slidably connected in the first slide groove (5) along a second direction. The first direction and the second direction are perpendicular.

2. The clamping device according to claim 1, characterized in that, The pressing assembly (2) includes a first driving member (21), a pressing head (22) and a pressing plate (23). The first driving member (21) is fixedly connected to the frame (4). The pressing head (22) is fixedly connected to the output end of the first driving member (21). The pressing plate (23) is connected to the frame (4). The first driving member (21) can drive the pressing head (22) to move downward along the second direction, so as to drive the pressing plate (23) to press the push rod (9).

3. The clamping device according to claim 2, characterized in that, Both the pressure plate (23) and the positioning block (1) are provided with semi-circular arc-shaped contact surfaces (11). The semi-circular arc-shaped contact surfaces (11) on the pressure plate (23) and the positioning block (1) can fit together with the push rod (9) so that the pressure plate (23) and the positioning block (1) hold the push rod (9).

4. The clamping device according to claim 2, characterized in that, The first driving component (21) is a gas-liquid booster cylinder.

5. The clamping device according to claim 2, characterized in that, The pressure plate (23) includes a guide hole extending along the second direction. The mounting plate (41) is provided with a blind hole (411) coaxial with the guide hole. The pressing assembly (2) also includes a guide member (24). The guide member (24) is sequentially inserted into the guide hole and the blind hole (411). One end of the guide member (24) is fixedly connected to the pressure plate (23), and the other end is slidably connected to the blind hole (411).

6. The clamping device according to claim 5, characterized in that, The pressing component (2) also includes an elastic element, which is disposed in the blind hole (411). One end of the elastic element is fixedly connected to the bottom of the blind hole (411), and the other end of the elastic element abuts against or is fixedly connected to the guide (24).

7. The clamping device according to claim 1, characterized in that, The push assembly (3) includes a second drive member (31) and a transmission rod (32). The second drive member (31) is fixedly connected to the frame (4). The transmission rod (32) is fixedly connected to the output end of the second drive member (31). The transmission rod (32) is located in the first slide groove (5). The second drive member (31) can drive the transmission rod (32) to move upward along the second direction and abut against the positioning block (1) so as to drive the positioning block (1) to abut against the push rod (9).

8. The clamping device according to claim 7, characterized in that, The bottom of the positioning block (1) is provided with a fixing hole (12), and the transmission rod (32) can move upward along the second direction and be inserted into the fixing hole (12).

9. The clamping device according to claim 7, characterized in that, The clamping device further includes a third driving member (7) and a positioning pad (8). The frame (4) is also provided with a second slide groove (6) extending in a third direction, and the second slide groove (6) communicates with the first slide groove (5). The positioning pad (8) is located in the second slide groove (6). The third driving member (7) is located at one end of the second slide groove (6), and the third driving member (7) is fixedly connected to the frame (4). The output shaft of the third driving member (7) is fixedly connected to the positioning pad (8). The third driving member (7) can drive the positioning pad. The block (8) slides in the second groove (6) so that the positioning pad (8) has an initial state and a supported state. When the positioning pad (8) is in the initial state, the positioning pad (8) is located at one end of the second groove (6) near the third drive member (7). When the positioning pad (8) is in the supported state, the positioning pad (8) is located at the connection between the first groove (5) and the second groove (6), and the positioning pad (8) abuts against the positioning block (1). The first direction, the second direction and the third direction are perpendicular to each other.

10. The clamping device according to claim 9, characterized in that, The second drive member (31) is an upward thrust cylinder; and / or, the third drive member (7) is a side thrust cylinder.

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