A piston rod machining clamping fixture

Abstract

This utility model belongs to the field of piston rod processing clamping fixtures, specifically a piston rod processing clamping fixture, including a base; a positioning component is fixedly connected to the top surface of the base in an axisymmetric manner, a positioning block structure is provided on the side of the positioning component, and a monitoring component is fixedly connected to the surface of the base; the positioning block structure includes a positioning rod that inserts into a positioning hole, sleeve holes are opened on both sides of one end of the positioning rod, a spring is sleeved in the sleeve hole, a limit bead is fixedly connected to one end of the spring, and a positioning block with an arc-shaped groove on the side is fixedly connected to the other end of the positioning rod; through the detachable design of the positioning block structure, the positioning block can be quickly replaced according to the piston rod diameter requirements. Specifically, the positioning rod is inserted into the positioning hole on the side of the sliding block, and the spring drives the limit bead to pop up and lock the positioning rod, realizing the quick replacement of positioning blocks with different arc-shaped grooves, thereby adapting to the clamping requirements of piston rods of various diameters.

Description

Technical Field

[0001] This utility model relates to the field of piston rod processing clamping fixtures, specifically a piston rod processing clamping fixture. Background Technology

[0002] The piston rod is the connecting component that supports the piston in performing work. It is mostly used in hydraulic cylinders and pneumatic cylinders. It is a moving component with frequent movement and high technical requirements. The quality of its machining directly affects the lifespan and reliability of the entire product. The piston rod has high machining requirements and strict requirements for coaxiality and wear resistance. The basic characteristic of the hydraulic cylinder rod is that it is a slender shaft, which is difficult to machine and has always troubled machining personnel.

[0003] In the prior art, such as in CN222627010U, a clamping fixture for machining radial holes in a piston rod is disclosed. It includes a mounting plate, and a clamping assembly is provided on the top outer wall of the mounting plate for clamping and limiting the piston rod. The clamping assembly includes a clamping unit, which includes a connecting support rod mounted on the top outer wall of the mounting plate. A fixing plate is mounted on the top outer wall of the connecting support rod. A trapezoidal block is slidably connected to the bottom outer wall surface of the fixing plate, and grippers are installed on the opposite surfaces of the two trapezoidal blocks.

[0004] While the aforementioned patent avoids scratching the chrome-plated surface when clamping the piston rod by placing rubber pads on the opposing surfaces of the two jaws, and provides greater stability during piston rod clamping by using two sets of jaws, preventing piston rod wobbling during hole machining, it suffers from limitations. Different piston rods have different diameters, while the side curvature of the jaws is fixed, making it unsuitable for machining piston rods of varying sizes. Furthermore, the lack of a structure to monitor clamping force means that insufficient clamping force can lead to unstable clamping, causing piston rod displacement and machining damage. Therefore, this paper proposes a piston rod machining clamping fixture to address these issues. Utility Model Content

[0005] To overcome the shortcomings of existing technology, piston rods of different specifications have different diameters, while the side arc of the gripper is fixed, making it impossible to adapt to the processing requirements of piston rods of different specifications. In addition, there is no structure to monitor the clamping force. If the clamping force is insufficient and the clamping is unstable, the piston rod will be displaced during processing, causing processing damage. This utility model proposes a piston rod processing clamping fixture.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a piston rod processing clamping fixture of this utility model includes a base; a positioning component is fixedly connected to the top surface of the base in an axisymmetric manner, a positioning block structure is provided on the side of the positioning component, and a monitoring component is fixedly connected to the surface of the base. The positioning component includes a track symmetrically fixed to the top surface of the base. A drive motor with a brake structure is fixedly connected to the bottom side of the track. The output end of the drive motor passes through the track and is fixedly connected to a swing rod. Both ends of the swing rod are rotatably connected to a pull rod. One end of the pull rod is rotatably connected to a connecting rod. A sliding block with a positioning hole is fixedly connected to the top of the connecting rod. The sliding block is slidably connected to the surface of the track. The positioning block structure includes a positioning rod that inserts into a positioning hole, with sleeve holes on both sides of one end of the positioning rod, a spring sleeved inside the sleeve hole, a limiting bead fixedly connected to one end of the spring, and a positioning block with an arc-shaped groove on the side fixedly connected to the other end of the positioning rod. The monitoring component includes a device box fixed to the top surface of the base, a control board sleeved inside the device box, an alarm light fixedly connected to the top surface of the device box, a pressure sensor group electrically connected to the surface of the control board, and the pressure sensor group fixed to the side of the sliding block and in contact with the surface of the positioning block.

[0007] Preferably, the swing arm is connected to symmetrically arranged sliding blocks via tie rods at both ends, and the drive motor can synchronously drive the two sliding blocks to move towards or away from each other on the track surface.

[0008] Preferably, the positioning block is detachably connected to the sliding block via a positioning rod, and when the positioning rod is inserted into the positioning hole, the spring drives the limiting bead to rise radially and lock the positioning rod.

[0009] Preferably, the pressure sensor group is embedded in the contact surface between the side of the sliding block and the back of the positioning block, and the pressure sensor group is used to detect the clamping pressure on the positioning block in real time.

[0010] Preferably, when the drive motor drives the swing arm to rotate, the rotational motion is converted into linear motion of the sliding block through the pull rod and connecting rod, and the arc-shaped groove of the positioning block forms the piston rod clamping position.

[0011] Preferably, the control board is configured to trigger an alarm light to issue a warning of insufficient clamping force when the pressure sensor group detects a value lower than a preset threshold.

[0012] The advantages of this utility model are: 1. This utility model uses a detachable design for the positioning block structure, which allows the positioning block to be quickly replaced according to the piston rod diameter requirements. Specifically, the positioning rod is inserted into the positioning hole on the side of the sliding block, and the spring drives the limit bead to pop up and lock the positioning rod, so as to realize the quick replacement of positioning blocks with different arc-shaped grooves, thereby adapting to the clamping requirements of piston rods with various diameters. After replacement, the clamping stability can still be guaranteed by driving the sliding block to move synchronously through the drive motor. 2. This utility model uses a pressure sensor group embedded in the contact surface between the side of the sliding block and the back of the positioning block in the monitoring component to detect the actual clamping pressure on the positioning block in real time. When the control board determines that the pressure value is lower than the preset threshold, it immediately triggers the alarm light on the top of the equipment box to issue a warning, so as to avoid insufficient clamping force due to failure of the drive motor brake structure or mechanical frame, and prevent damage caused by piston rod displacement during processing from the root. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the positioning component structure of this utility model; Figure 3 This is a schematic diagram of the positioning block structure of this utility model; Figure 4 This is a schematic diagram of the monitoring component structure of this utility model.

[0015] In the diagram: 1. Base; 2. Positioning component; 21. Track; 22. Drive motor; 23. Swing rod; 24. Pull rod; 25. Connecting rod; 26. Sliding block; 3. Positioning block structure; 31. Positioning rod; 32. Spring; 33. Limit bead; 34. Positioning block; 4. Monitoring component; 41. Equipment box; 42. Control board; 43. Alarm light; 44. Pressure sensor group. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0017] Please see Figures 1-4 As shown, a piston rod processing clamping fixture includes a base 1; a positioning component 2 is fixedly connected to the top surface of the base 1 in an axisymmetric manner, a positioning block structure 3 is provided on the side of the positioning component 2, and a monitoring component 4 is fixedly connected to the surface of the base 1. The positioning component 2 includes a track 21 that is symmetrically fixed to the top surface of the base 1. A drive motor 22 with a brake structure is fixedly connected to the bottom side of the track 21. The output end of the drive motor 22 passes through the track 21 and is fixedly connected to a swing rod 23. Both ends of the swing rod 23 are rotatably connected to a pull rod 24. One end of the pull rod 24 is rotatably connected to a connecting rod 25. The top end of the connecting rod 25 is fixedly connected to a sliding block 26 with a positioning hole. The sliding block 26 is slidably connected to the surface of the track 21. The positioning block structure 3 includes a positioning rod 31 that inserts into the positioning hole. One end of the positioning rod 31 has sleeve holes on both sides. A spring 32 is sleeved in the sleeve holes. One end of the spring 32 is fixedly connected to a limiting bead 33. The other end of the positioning rod 31 is fixedly connected to a positioning block 34 with an arc-shaped groove on its side. During operation, when piston rods of different diameters need to be adapted, the operator inserts the positioning block 34 with matching arc-shaped grooves in the positioning block structure 3 into the positioning hole on the side of the sliding block 26 through the positioning rod 31. At this time, the spring 32 at the end of the positioning rod 31 is compressed and drives the limiting bead 33 to bounce radially and lock into the groove on the inner wall of the positioning hole to lock the positioning rod 31, completing the quick assembly and disassembly. Then, the drive motor 22 drives the swing rod 23 to rotate, and pulls the two sliding blocks 26 to move synchronously towards each other on the surface of the track 21 through the pull rod 24 and the connecting rod 25, so that the arc-shaped grooves of the two positioning blocks 34 accurately clamp piston rods of different specifications.

[0018] Furthermore, the monitoring component 4 includes a device box 41 fixed to the top surface of the base 1, a control board 42 sleeved inside the device box 41, an alarm light 43 fixedly connected to the top surface of the device box 41, and a pressure sensor group 44 electrically connected to the surface of the control board 42. The pressure sensor group 44 is fixed to the side of the sliding block 26 and fits against the surface of the positioning block 34. During operation, the pressure sensor group 44 embedded between the side of the sliding block 26 and the back of the positioning block 34 detects the actual clamping pressure on the positioning block 34 in real time. If the brake structure of the drive motor 22 fails or the mechanical transmission causes the pressure value to be lower than the preset threshold of the control board 42, the control board 42 immediately triggers the alarm light 43 on the top of the equipment box 41 to emit a red light warning and force the machine to stop to avoid processing damage caused by piston rod displacement.

[0019] Furthermore, when the drive motor 22 drives the swing rod 23 to rotate, the rotational motion is converted into the linear motion of the sliding block 26 through the pull rod 24 and the connecting rod 25, and the arc-shaped groove of the positioning block 34 forms the piston rod clamping position; During operation, when the drive motor 22 starts, its output end drives the swing rod 23 to rotate. The rotational motion is transmitted to the connecting rod 25 through the pull rod 24 connected at both ends, forcing the sliding block 26 at the top of the connecting rod 25 to make linear displacement on the surface of the track 21. At this time, the two symmetrically arranged sliding blocks 26 move synchronously towards each other under the mechanical linkage, so that the positioning block 34 fixed on its side accurately clamps the piston rod with the arc-shaped groove. This design converts the rotational motion into linear motion, making the clamping action stable and efficient. The clamping position formed by the arc-shaped groove can adapt to the cylindrical shape of the piston rod, avoiding the problem of insufficient adaptability caused by the fixed curvature of the gripper in the prior art.

[0020] Furthermore, the control board 42 is configured to trigger the alarm light 43 to issue a warning of insufficient clamping force when the pressure sensor group 44 detects a value lower than a preset threshold. During operation, the pressure sensor group 44 detects the pressure value of the contact surface between the back of the positioning block 34 and the sliding block 26 in real time during the clamping process, and transmits the data to the control board 42 in the equipment box 41. When the brake structure of the drive motor 22 fails or the mechanical frame causes the pressure value to be lower than the preset threshold of the control board 42, the control board 42 immediately triggers the alarm light 43 to issue an audible and visual warning, forcing the operator to stop the machine for adjustment. This pressure monitoring and alarm linkage structure fundamentally avoids the risk of piston rod displacement caused by insufficient clamping force, and directly solves the problem of processing damage caused by the lack of clamping force monitoring in the background technology.

[0021] Working principle: The operator inserts the matching positioning block 34 into the positioning hole on the side of the sliding block 26 through the positioning rod 31 according to the piston rod diameter. When the positioning rod 31 is inserted, the spring 32 is compressed and then released, causing the limit bead 33 to spring up radially and lock. After starting the drive motor 22 with the brake structure, its output end drives the swing rod 23 to rotate. The connecting rod 25 is pulled by the pull rod 24 connected at both ends, forcing the sliding block 26 at the top of the connecting rod 25 to slide towards each other on the surface of the track 21. The two sliding blocks 26 move synchronously, causing the positioning block 34 to clamp the piston rod with the arc-shaped groove. At this time, the pressure sensor group 44 embedded between the side of the sliding block 26 and the back of the positioning block 34 detects the clamping pressure in real time. If the pressure value is lower than the preset threshold of the control board 42 in the equipment box 41, the control board 42 immediately triggers the alarm light 43 to alarm. At the same time, the brake structure of the drive motor 22 locks the output shaft to maintain the clamping force until manual intervention is performed to resolve the abnormality.

[0022] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or similar improvements made within the theoretical and principle content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clamping fixture for machining piston rods, characterized in that: Includes a base (1); the top surface of the base (1) is fixedly connected to a positioning component (2) in an axisymmetric manner, the side of the positioning component (2) is provided with a positioning block structure (3), and the surface of the base (1) is fixedly connected to a monitoring component (4). The positioning component (2) includes a track (21) fixed symmetrically to the top surface of the base (1). A drive motor (22) with a brake structure is fixedly connected to the bottom side of the track (21). The output end of the drive motor (22) passes through the track (21) and is fixedly connected to a swing rod (23). Both ends of the swing rod (23) are rotatably connected to a pull rod (24). One end of the pull rod (24) is rotatably connected to a connecting rod (25). The top end of the connecting rod (25) is fixedly connected to a sliding block (26) with a positioning hole. The sliding block (26) is slidably connected to the surface of the track (21). The positioning block structure (3) includes a positioning rod (31) that is inserted into a positioning hole. A sleeve hole is opened on both sides of one end of the positioning rod (31). A spring (32) is sleeved in the sleeve hole. A limiting bead (33) is fixedly connected to one end of the spring (32). A positioning block (34) with an arc-shaped groove on the side is fixedly connected to the other end of the positioning rod (31). The monitoring component (4) includes a device box (41) fixed to the top surface of the base (1), a control board (42) is sleeved inside the device box (41), an alarm light (43) is fixedly connected to the top surface of the device box (41), a pressure sensor group (44) is electrically connected to the surface of the control board (42), and the pressure sensor group (44) is fixed to the side of the sliding block (26) and fits against the surface of the positioning block (34).

2. The piston rod machining clamping fixture according to claim 1, characterized in that: The swing rod (23) is connected to symmetrically arranged sliding blocks (26) through the pull rods (24) at both ends. The drive motor (22) can synchronously drive the two sliding blocks (26) to move towards or away from each other on the surface of the track (21).

3. The piston rod machining clamping fixture according to claim 1, characterized in that: The positioning block (34) is detachably connected to the sliding block (26) via the positioning rod (31). When the positioning rod (31) is inserted into the positioning hole, the spring (32) drives the limiting bead (33) to bounce radially and lock the positioning rod (31).

4. The piston rod machining clamping fixture according to claim 1, characterized in that: The pressure sensor group (44) is embedded in the contact surface between the side of the sliding block (26) and the back of the positioning block (34), and the pressure sensor group (44) is used to detect the clamping pressure on the positioning block (34) in real time.

5. The piston rod machining clamping fixture according to claim 1, characterized in that: When the drive motor (22) drives the swing rod (23) to rotate, the rotational motion is converted into the linear motion of the sliding block (26) through the pull rod (24) and the connecting rod (25). The arc-shaped groove of the positioning block (34) forms the piston rod clamping position.

6. The piston rod machining clamping fixture according to claim 1, characterized in that: The control board (42) is configured to trigger an alarm light (43) to issue a warning of insufficient clamping force when the pressure sensor group (44) detects a value lower than a preset threshold.

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