Positioning clamp
By adopting the design of a bidirectional spindle clamp seat and a movable positioning rod in the positioning fixture, the problem of difficulty in alignment of the connecting rod center is solved, efficient machining accuracy and efficiency are achieved, and the safety and stability of the clamping process are ensured through the use of pressure sensors and buffer pads.
Patent Information
- Application Number
- CN202421672913.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-16
AI Technical Summary
During the motorcycle link processing process, it is difficult to align the center of the link to fix it on the positioning fixture, which affects the processing accuracy and efficiency.
A positioning fixture is designed including a bidirectional spindle clamp seat and a movable upward and downward positioning rod, which is clamped to the central position by being close to or away from the moving link of the positioning rods and being clamped with the bidirectional spindle clamp seat.
Automatic center alignment of the connecting rod is achieved, machining accuracy and efficiency are improved, and the smoothness and safety of the clamping process is ensured through the use of pressure sensors and buffer pads.
Smart Images
Figure CN222903317U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of workpiece positioning, and in particular, to a positioning fixture. Background Art
[0002] The motorcycle connecting rod is a key connecting component between the handlebar and the wheel, and its machining accuracy directly affects the driving performance and safety of the motorcycle.
[0003] During the machining process of the connecting rod, it is necessary to perform hole opening machining on both ends of the connecting rod through a milling cutter. At present, in order to improve the machining efficiency, a double-end synchronous machining method is selected. Generally, a two-way spindle clamp is used for clamping, and milling cutters are arranged at both ends for machining; positioning holes penetrating left and right are provided on the clamp, and corresponding pneumatic clamping components are provided. The connecting rod is inserted into the positioning hole, and the corresponding cylinder can drive the clamping component to clamp the connecting rod, so as to machine by moving the milling cutters at both ends.
[0004] In view of the above related technologies, in actual operation, it is difficult to place the connecting rod at the center of the two-way spindle clamp so that the lengths of both ends of the connecting rod extending out of the two-way spindle clamp are the same, that is, it is difficult to align the center of the connecting rod, which directly affects the machining accuracy and efficiency. Summary of the Utility Model
[0005] In order to facilitate aligning and fixing the center of the connecting rod on the positioning fixture, this application provides a positioning fixture.
[0006] This application provides a positioning fixture, adopting the following technical solutions:
[0007] A positioning fixture includes a workbench, a two-way spindle clamp arranged on the workbench, and further includes a positioning rod movably arranged up and down on the workbench and a first driving member for driving the positioning rod to move up and down. The positioning rods are symmetrically arranged on both sides of the two-way spindle clamp, and further includes a second driving member for driving the two positioning rods to move in a direction close to or away from each other.
[0008] By adopting the above technical solutions, the two-way spindle clamp is used to clamp the connecting rod, and at the same time, two positioning rods that can approach or separate from each other are provided, so as to drive the connecting rod placed on the two-way spindle clamp to move to the central position, and then cooperate with the two-way spindle clamp to clamp, so that the center of the connecting rod can be conveniently aligned and fixed on the positioning fixture.
[0009] Optionally, a pressure sensor is arranged on the side wall of the positioning rod facing the two-way spindle clamp, and the pressure sensor is connected to the second driving member.
[0010] By adopting the above technical solution, a pressure sensor is arranged on the positioning rod and connected to the second driving member, so that the pressure change between the workpiece and the positioning rod can be monitored in real time. This design enables the fixture to automatically adjust the clamping force according to the pressure feedback. When the connecting rod has been adjusted to the central position, the movement of the positioning rod is automatically stopped according to the pressure feedback.
[0011] Optionally, a buffer pad is arranged on one side wall of the lower end of the positioning rod facing the two-way spindle chuck, and the pressure sensor is arranged between the buffer pad and the positioning rod.
[0012] By adopting the above technical solution, a buffer pad is arranged at the lower end of the positioning rod, and the pressure sensor is placed between the buffer pad and the positioning rod, effectively reducing the direct impact between the workpiece and the positioning rod. The introduction of the buffer pad not only protects the workpiece, but also improves the stability and safety of the clamping process.
[0013] Optionally, a positioning seat is arranged on the workbench to move up and down, and the two positioning rods are both slidably arranged on the positioning seat, and the first driving member can drive the positioning seat to move up and down.
[0014] By adopting the above technical solution, the workbench is arranged on the positioning seat to move up and down, which can facilitate the up and down movement of the two positioning rods.
[0015] Optionally, two guide blocks are slidably arranged in the positioning seat, guide grooves for the guide blocks to slide are formed in the positioning seat, the positioning rods are respectively arranged at the lower ends of the two guide blocks, and through grooves for the positioning rods to pass through and slide are formed in the positioning seat.
[0016] By adopting the above technical solution, guide blocks and guide grooves are arranged in the positioning seat, providing an accurate sliding track for the positioning rod. This design not only improves the sliding accuracy of the positioning rod, but also ensures the stability and consistency of the clamping process.
[0017] Optionally, the second driving member includes a bidirectional screw rotatably arranged on the positioning seat and a motor for driving the bidirectional screw to rotate. The bidirectional screw has a forward thread and a reverse thread with opposite threads. The bidirectional screw is threadedly passed through the two guide blocks, and the two guide blocks are respectively threadedly connected to the forward thread and the reverse thread.
[0018] By adopting the above technical solution, the bidirectional screw and the motor are used as the core components of the second driving member. The rotation of the motor drives the bidirectional screw to rotate, thereby realizing the mutual approach or separation of the two positioning rods. This design makes the clamping process more automated and precise, improving the efficiency and accuracy of the fixture.
[0019] Optionally, the second driving member further includes a worm gear and a worm. One end of the bidirectional screw penetrates through the side wall of the positioning seat. The worm gear is coaxially sleeved at the end of the bidirectional screw. The worm is engaged with the worm gear. The output end of the motor is connected to the worm.
[0020] By adopting the above technical solution, a worm gear and worm drive mechanism is introduced between the bidirectional screw and the motor, enabling the rotational motion of the motor to be smoothly converted into the rotational motion of the bidirectional screw. This design not only improves the transmission efficiency but also reduces the noise and vibration during the transmission process.
[0021] Optionally, the first driving member is a cylinder provided on the workbench. The end of the telescopic shaft of the cylinder is connected to the positioning seat.
[0022] By adopting the above technical solution, using a cylinder as the first driving member, the positioning seat is driven to move up and down through the telescopic motion of the cylinder. This design makes the lifting process of the fixture more stable and reliable.
[0023] Optionally, a guide rod is provided on the workbench. The guide rod slidably penetrates through the positioning seat. The length direction of the guide rod is parallel to the length direction of the telescopic shaft of the cylinder.
[0024] By adopting the above technical solution, a guide rod is provided on the workbench to ensure the stability of the positioning seat during the lifting process. The guide rod slidably penetrates through the positioning seat, forming a stable sliding connection with the positioning seat.
[0025] Optionally, an anti - detachment block for restricting the positioning seat from disengaging from the guide rod is provided at the lower end of the guide rod.
[0026] By adopting the above technical solution, an anti - detachment block is provided at the lower end of the guide rod, effectively preventing the positioning seat from disengaging from the guide rod during the lifting process, further improving the safety and reliability of the fixture.
[0027] In summary, the present application includes at least one of the following beneficial effects:
[0028] 1. The present invention adopts positioning rods that can move up and down and can move away from or close to each other along the center of the fixture, realizing the automatic center alignment function of the connecting rod, thereby improving the processing accuracy and efficiency;
[0029] 2. In the present invention, a pressure sensor and a buffer pad are preferably adopted. Since the pressure sensor can real - time monitor the pressure between the positioning rod and the connecting rod, realizing the automatic positioning function, and at the same time the buffer pad can prevent the positioning rod from damaging the connecting rod, improving the smoothness and safety of the clamping process. Description of the Drawings
[0030] Figure 1It is a schematic structural diagram of an embodiment of the present application;
[0031] Figure 2 It is a schematic cross-sectional structure diagram of the positioning seat;
[0032] Figure 3 It is a schematic structural diagram of the positioning rod.
[0033] Explanation of reference numerals: 101, connecting rod; 1, workbench, 11, guide rod; 12, anti-detachment block; 2, two-way main shaft clamp; 3, positioning rod; 4, first driving member; 41, cylinder; 5, second driving member; 51, two-way screw rod; 52, motor; 53, worm gear; 54, worm; 6, pressure sensor; 7, buffer pad; 8, positioning seat; 81, guide block. Detailed implementation manners
[0034] The following will further describe the present application in detail with reference to the attached Figures 1-3 drawings.
[0035] An embodiment of the present application discloses a positioning fixture. Referring to Figure 1 , the positioning fixture includes a workbench 1, a two-way main shaft clamp 2 arranged on the workbench 1, a positioning rod 3 movably arranged up and down on the workbench 1, and a first driving member 4 for driving the positioning rod 3 to move up and down. The positioning rods 3 are symmetrically arranged on both sides of the two-way main shaft clamp 2. The positioning fixture further includes a second driving member 5 for driving the two positioning rods 3 to move in a direction close to or away from each other.
[0036] Referring to Figure 1 and Figure 2 , in this embodiment, specifically, a positioning seat 8 is also movably arranged up and down on the workbench 1. The positioning seat 8 is arranged above the two-way main shaft clamp 2. The positioning rod 3 is slidably arranged below the positioning seat 8. The first driving member 4 can drive the positioning seat 8 to move up and down, in cooperation with the second driving member 5. When in use, first pass the connecting rod 101 through the two-way main shaft clamp 2, then drive the positioning seat 8 and the positioning rod 3 to move downward by the first driving member 4, and then drive the two positioning rods 3 to move closer to each other simultaneously by the second driving member 5. During this process, drive the connecting rod 101 to move and adjust left and right. When both positioning rods 3 abut against both ends of the connecting rod 101, the connecting rod 101 is moved and adjusted to a position centered with respect to the two-way main shaft clamp 2. At this time, the positioning rod 3 can be moved in one direction, and then move the positioning seat 8 upward, while the two-way main shaft clamp 2 clamps the connecting rod 101, thereby completing the positioning of the connecting rod 101.
[0037] Referring to Figure 1 and Figure 2, in this embodiment, further, the cross-section of the positioning seat 8 can be rectangular. Two guiding blocks 81 are slidably arranged in the positioning seat 8. The guiding blocks 81 are preferably rectangular blocks. A guiding groove for the guiding blocks 81 to slide is formed in the positioning seat 8, and the guiding groove extends along the length direction of the positioning seat 8, so that the guiding blocks 81 can slide freely in the guiding groove. The upper ends of the two positioning rods 3 are respectively connected to the guiding blocks 81. The width of the guiding blocks 81 is greater than the width of the positioning rods 3. A slot for the positioning rods 3 to pass through and slide is formed in the lower surface of the positioning seat 8, so that the positioning rods 3 can move along with the movement of the guiding blocks 81.
[0038] Referring to Figure 1 and Figure 2 , in this embodiment, the second driving member 5 includes a bidirectional screw 51 rotatably arranged on the positioning seat 8, and a motor 52 for driving the bidirectional screw 51 to rotate. The bidirectional screw 51 is located in the sliding groove, and both ends of the bidirectional screw 51 can be rotatably connected to the positioning seat 8 by means of bearings or the like. The outer side wall of the bidirectional screw 51 has a forward thread and a reverse thread with opposite threads, and its threads pass through the two guiding blocks 81. The two guiding blocks 81 are respectively threadedly connected to the forward thread and the reverse thread. When the motor 52 drives the bidirectional screw 51 to rotate, since the two guiding blocks 81 are respectively connected to the forward thread and the reverse thread, the two guiding blocks 81 will move in opposite directions, so as to realize the mutual approach or separation of the two positioning rods 3.
[0039] Referring to Figure 1 and Figure 2 , in this embodiment, the second driving member 5 further includes a worm gear 53 and a worm 54. One end of the bidirectional screw 51 passes through the side wall of the positioning seat 8. The worm gear 53 is coaxially sleeved on the end of the bidirectional screw 51. The worm 54 is fixed to the side wall of the positioning seat 8 by means of a support or the like. The motor 52 is also fixed to the side wall of the positioning seat 8 by means of bolts or the like. The worm 54 meshes with the worm gear 53, and the output end of the motor 52 is connected to the worm 54. This structure can achieve more stable and accurate rotation control, thereby improving the accuracy and stability of the positioning fixture
[0040] Referring to Figure 1 and Figure 2 , in this embodiment, the first driving member 4 is a cylinder 41 arranged on the workbench 1. The end of the telescopic shaft of the cylinder 41 is connected to the positioning seat 8, and is preferably connected to the central position of the positioning seat 8. Through the telescopic movement of the cylinder 41, the positioning seat 8 can be driven to move up and down, so as to realize the up and down adjustment of the positioning rod 3. Optionally, the end of the telescopic shaft of the cylinder 41 can be fixedly connected to the positioning seat 8, or a flange can be arranged at the end of the cylinder 41 and detachably connected to the positioning seat 8 by bolts.
[0041] Referring to Figure 1 and Figure 2, in an alternative embodiment, in order to further improve the stability and accuracy of the positioning fixture, a guide rod 11 is fixed on the workbench 1. The shape of the guide rod 11 is not limited. The lower end of the guide rod 11 slides downward through the positioning seat 8. The length direction of the guide rod 11 is parallel to the length direction of the telescopic shaft of the air cylinder 41 to ensure the stability and accuracy of the positioning seat 8 during the up and down movement. Multiple guide rods 11 can be provided. Preferably, the guide rods 11 can be respectively arranged around the positioning seat 8. Further, an anti-detachment block 12 is fixed at the lower end of the guide rod 11 to limit the positioning seat 8 from disengaging from the guide rod 11, thereby ensuring the safety and reliability of the positioning fixture.
[0042] Referring to Figure 2 and Figure 3 , in an alternative embodiment, the positioning fixture further includes a pressure sensor 6. The pressure sensors 6 are respectively arranged on the side walls of the two positioning rods 3 facing the two-way main shaft clamp 2. At the same time, the pressure sensor 6 is connected to the second driving member 5, that is, the pressure sensor 6 is connected to the motor 52, for monitoring the pressure between the positioning rod 3 and the connecting rod 101 in real time and transmitting the pressure signal to the motor 52. Thus, when the two positioning rods 3 approach each other to clamp the connecting rod 101, the pressure value on the pressure sensor 6 reaches a certain value, which can be fed back to the motor 52, so that the motor 52 stops rotating and then starts to rotate in the reverse direction, driving the positioning rod 3 to disengage from the connecting rod 101. The pressure sensor 6 can be connected to the motor 52 through a signal wire or transmit the signal to the motor 52 through a wireless connection.
[0043] Referring to Figure 2 and Figure 3 , further, a buffer pad 7 can be arranged on the side wall of the lower end of the positioning rod 3 facing the two-way main shaft clamp 2. The buffer pad 7 can be made of an elastic material such as rubber to prevent the positioning rod 3 from damaging the connecting rod 101. The pressure sensor 6 is arranged between the buffer pad 7 and the positioning rod 3 to more accurately monitor the pressure between the positioning rod 3 and the connecting rod 101. At the same time, through the isolation of the buffer pad 7, the pressure sensor 6 can also be protected from damage.
[0044] The implementation principle of a positioning fixture according to an embodiment of the present application is as follows: During use, first pass the connecting rod 101 through the two-way main shaft clamp 2, then start the air cylinder 41, move the positioning seat 8 downward so that the positioning rods 3 are located on both sides of the connecting rod 101, and then drive the two-way screw 51 to rotate through the motor 52, thereby driving the two positioning rods 3 to move in the direction of approaching each other, driving the connecting rod 101 to move, and adjusting the two to a centrally symmetric state. At this time, after the pressure sensor 6 reaches the pressure threshold, the signal is transmitted to the motor 52, and then the positioning rod 3 can be slid in the reverse direction and the positioning seat 8 can be moved upward to complete the positioning of the connecting rod 101.
[0045] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A positioning fixture, comprising a workbench (1), and a bidirectional spindle clamping seat (2) arranged on the workbench (1), characterized in that: It also includes a positioning rod (3) arranged on the workbench (1) for upward and downward movement, and a first driving member (4) for driving the positioning rod (3) to move upward and downward, the positioning rod (3) being symmetrically arranged on both sides of the bidirectional spindle clamp (2), and also includes a second driving member (5) for driving the two positioning rods (3) to move in a direction toward or away from each other.
2. A positioning fixture according to claim 1, characterized in that: A pressure sensor (6) is provided on a side wall of the positioning rod (3) facing the bidirectional spindle clamp (2), and the pressure sensor (6) is connected to the second driving member (5).
3. A positioning fixture according to claim 2, characterized in that: A buffer pad (7) is provided on a side wall of a side of the lower end of the positioning rod (3) facing the bidirectional spindle clamp (2), and the pressure sensor (6) is provided between the buffer pad (7) and the positioning rod (3).
4. A positioning fixture according to claim 1, characterized in that: The workbench (1) is provided with a positioning seat (8) which can be moved up and down, and the two positioning rods (3) are both slidably arranged on the positioning seat (8), and the first driving member (4) can drive the positioning seat (8) to move up and down.
5. A positioning fixture according to claim 4, characterized in that: Two guide blocks (81) are slidably arranged in the positioning seat (8), and guide grooves are provided in the positioning seat (8) for the guide blocks (81) to slide. The positioning rods (3) are respectively arranged at the lower ends of the two guide blocks (81), and the positioning seat (8) is provided with grooves for the positioning rods (3) to pass through and slide.
6. A positioning fixture according to claim 5, characterized in that: The second driving member (5) comprises a bidirectional screw (51) rotatably arranged on the positioning seat (8), and a motor (52) for driving the bidirectional screw (51) to rotate, the bidirectional screw (51) having a forward thread and a reverse thread with opposite threads, the bidirectional screw (51) being threadedly passed through the two guide blocks (81), and the two guide blocks (81) being threadedly connected to the forward thread and the reverse thread respectively.
7. A positioning fixture according to claim 6, characterized in that: The second driving member (5) further comprises a worm wheel (53) and a worm (54); one end of the bidirectional screw (51) passes through a side wall of the positioning seat (8); the worm wheel (53) is coaxially sleeved on an end of the bidirectional screw (51); the worm (54) is meshed with the worm wheel (53); and an output end of the motor (52) is connected to the worm (54).
8. A positioning fixture according to claim 7, characterized in that: The first driving member (4) is a cylinder (41) arranged on the workbench (1), and the end of the telescopic shaft of the cylinder (41) is connected to the positioning seat (8).
9. A positioning fixture according to claim 8, characterized in that: A guide rod (11) is provided on the workbench (1), and the guide rod (11) is slidably passed through the positioning seat (8), and the length direction of the guide rod (11) is parallel to the length direction of the telescopic axis of the cylinder (41).
10. A positioning fixture according to claim 9, characterized in that: An anti-falling block (12) for limiting the positioning seat (8) from falling off the guide rod (11) is provided at the lower end of the guide rod (11).