Tensioning pull-down positioning clamp

Abstract

The utility model discloses a tensioning pull-down positioning fixture, which belongs to the field of workpiece processing fixtures and comprises a processing table, a connecting seat fixedly mounted at the bottom of the processing table, a fixed bottom plate fixedly mounted at the top end of the processing table, and a workpiece arranged in the middle of the top surface of the processing table. An ejection air cylinder is fixedly installed in the connecting base, a connecting shaft is fixedly connected to the top end of the ejection air cylinder, a U-shaped plate is rotatably installed on the surface of the connecting shaft, and a guide rod is fixedly installed on the side face of the U-shaped plate. The clamping effect can be effectively achieved when the pressing blocks are pressed, stress uniformity is guaranteed, the adaptability of the device is improved, then the practicability of the whole clamp is improved, in addition, the whole clamp still has high-strength connectivity after the positions of the pressing blocks are changed through the supporting assemblies, pressure uniformity is guaranteed, and the service life of the workpiece is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of workpiece processing fixtures, and more specifically, to a tensioning pull-down positioning fixture. Background Technology

[0002] The current patent publication number CN221110764U discloses a tensioning pull-down positioning fixture, including a main board. Symmetrical side mounting plates are installed at both ends of the main board, and the side mounting plates can be fixed to a rotating table. Symmetrical pads are provided on the main board, and a workpiece is placed on the top of each pad. Symmetrical quick-pressing mechanisms are provided at both ends of the workpiece. Positioning bottom holes are provided on the workpiece, distributed at the four corners inside the workpiece. A positioning rod is fitted in one set of diagonally opposite positioning bottom holes, and an automatic tensioning mechanism is provided in the other set of diagonally opposite positioning bottom holes. The workpiece can be clamped by the automatic tensioning mechanism. Its advantages include rapid positioning and clamping, good stability, rapid workpiece tensioning, ensuring overall force balance of the workpiece, long service life, and avoiding stress concentration fracture of parts over a long period, which affects clamping stability.

[0003] While existing technologies can quickly position and clamp workpieces to ensure force balance, the clamping position of the pressure block used for pressing down is fixed during the workpiece clamping process. This makes it impossible to effectively ensure force balance during each pressing when clamping workpieces of different lengths. Even if adjustments are made, the clamping must be re-selected and re-clamped, which is troublesome and inefficient. Therefore, this positioning fixture still has significant limitations. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a tensioning pull-down positioning clamp that can adjust the position of the pressure block to a certain extent, so that it can effectively clamp workpieces of different specifications when pressed down, ensuring uniform force distribution and improving the adaptability of the device, thereby improving the overall practicality of the clamp. In addition, the use of support components ensures that the overall structure still has high-strength connectivity after the position of the pressure block is changed, ensuring uniform pressure and extending the service life of the workpiece.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A tensioning pull-down positioning fixture includes a processing table, a connecting seat fixedly installed at the bottom of the processing table, a fixed base plate fixedly installed at the top of the processing table, a workpiece disposed in the center of the top surface of the processing table, an ejector cylinder fixedly installed inside the connecting seat, a connecting shaft fixedly connected to the top of the ejector cylinder, a U-shaped plate rotatably mounted on the surface of the connecting shaft, a guide rod fixedly mounted on the side of the U-shaped plate, a fixed rod rotatably mounted at the bottom end of the guide rod, a threaded ring rotatably mounted inside the top of the U-shaped plate, a screw threaded inside the threaded ring, a pressure block fixedly mounted at the top of the screw, and support components fixedly connected to both the left and right sides of the U-shaped plate.

[0009] Furthermore, the bottom end of the fixing rod is fixedly installed on the top end of the fixing base plate.

[0010] Furthermore, a limiting plate is fixedly installed on one side of the bottom surface of the pressure block, and the limiting plate is slidably installed inside the U-shaped plate.

[0011] Furthermore, a limiting ring is integrally formed at the bottom end of the threaded ring, and the limiting ring is rotatably installed inside the top surface of the U-shaped plate. Several protruding rods are integrally formed on the outer wall of the threaded ring.

[0012] Furthermore, the support assembly includes a support rod, a connecting frame rotatably mounted at one end of the support rod, a rotating ring rotatably mounted at the top of the connecting frame, a transverse plate fixedly mounted on the side of the rotating ring, a slider fixedly mounted at the bottom of the middle of the transverse plate, a guide rail slidably mounted inside the slider, a spring movably sleeved on the surface of the guide rail, and a base frame fixedly connected to the top of the guide rail.

[0013] Furthermore, the top surface of the base frame is fixedly mounted on the bottom surface of the pressure block, one end of the spring is fixedly connected to the side of one end of the guide rail, and the other end of the spring is fixedly connected to the side of the slider.

[0014] Furthermore, the side of the support rod is fixedly connected to the side of the U-shaped plate.

[0015] 3. Beneficial Effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] This solution utilizes a threaded ring and a screw to drive the pressure block to extend and retract, thereby changing the position of its pressing point and adapting to the clamping requirements of workpieces of different specifications, thus improving the overall applicability of the fixture.

[0018] This solution utilizes a support component to automatically adjust the angle of the pressure block during its extension and retraction, thereby increasing the connection strength between the U-shaped plate and the pressure block. Combined with a limiting thick plate, this further enhances the connection strength between the two, preventing excessive local load pressure on the screw from affecting its service life. Thus, the overall practicality of the device is improved. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure of the pressing block in this utility model;

[0021] Figure 3 This is a schematic diagram of the outer structure of the pressure block in this utility model;

[0022] Figure 4 This is a schematic diagram of the threaded ring structure in this utility model;

[0023] Figure 5 This is a schematic diagram of the support component structure in this utility model.

[0024] Explanation of the labels in the diagram:

[0025] 1. Machining table; 2. Connecting seat; 3. Fixed base plate; 4. Workpiece; 5. Pressure block; 6. Ejection cylinder; 7. U-shaped plate; 8. Support assembly; 501. Limiting plate; 502. Screw; 503. Threaded ring; 504. Limiting ring; 601. Connecting shaft; 701. Guide rod; 702. Fixed rod; 801. Support rod; 802. Connecting frame; 803. Rotary ring; 804. Transverse plate; 805. Slider; 806. Spring; 807. Guide rail; 808. Base frame. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0029] Example

[0030] Please see Figure 1-5 A tensioning pull-down positioning fixture includes a processing table 1, a connecting seat 2 fixedly installed at the bottom of the processing table 1, a fixed base plate 3 fixedly installed at the top of the processing table 1, a workpiece 4 disposed in the middle of the top surface of the processing table 1, an ejector cylinder 6 fixedly installed inside the connecting seat 2, a connecting shaft 601 fixedly connected to the top of the ejector cylinder 6, a U-shaped plate 7 rotatably installed on the surface of the connecting shaft 601, a guide rod 701 fixedly installed on the side of the U-shaped plate 7, a fixed rod 702 rotatably installed at the bottom end of the guide rod 701, a threaded ring 503 rotatably installed inside the top of the U-shaped plate 7, a screw 502 threaded inside the threaded ring 503, a pressure block 5 fixedly installed at the top of the screw 502, and support components 8 fixedly connected to both the left and right sides of the U-shaped plate 7.

[0031] It should be noted that the processing table 1, connecting seat 2 and workpiece 4 in this application are all prior art. Therefore, the connection methods and components required for connection in the prior art will not be described in detail in this application.

[0032] The bottom end of the fixing rod 702 is fixedly installed on the top of the fixing base plate 3. A limiting plate 501 is fixedly installed on one side of the bottom surface of the pressure block 5. The limiting plate 501 is slidably installed inside the U-shaped plate 7. The bottom end of the threaded ring 503 is integrally formed with a limiting ring 504. The limiting ring 504 is rotatably installed inside the top surface of the U-shaped plate 7. The outer wall of the threaded ring 503 is integrally formed with several protruding rods.

[0033] Specifically, the limiting ring 504 can ensure that the threaded ring 503 has a limiting effect when rotating on the top surface of the U-shaped plate 7, ensuring its own rotation in place and achieving stable transmission. Secondly, the external protrusion of the threaded ring 503 can effectively help the user increase the contact friction, facilitate rotation, and improve practicality.

[0034] The support assembly 8 includes a support rod 801, a connecting frame 802 rotatably mounted at one end of the support rod 801, a rotating ring 803 rotatably mounted at the top of the connecting frame 802, a transverse plate 804 fixedly mounted on the side of the rotating ring 803, a slider 805 fixedly mounted at the bottom of the middle part of the transverse plate 804, a guide rail 807 slidably mounted inside the slider 805, a spring 806 movably sleeved on the surface of the guide rail 807, a base frame 808 fixedly connected to the top of the guide rail 807, the top surface of the base frame 808 fixedly mounted on the bottom surface of the pressure block 5, one end of the spring 806 fixedly connected to the side of one end of the guide rail 807, the other end of the spring 806 fixedly connected to the side of the slider 805, and the side of the support rod 801 fixedly connected to the side of the U-shaped plate 7.

[0035] Specifically, the left and right ends of the connecting frame 802 are rotated to ensure that there is no mutual exclusion of movement when its position changes. Secondly, the support rods 801 are distributed on the left and right ends of the U-shaped plate 7 to ensure the connection stability between the pressure block 5 and the U-shaped plate 7. Finally, the spring 806 ensures that the slider 805 has a retraction power source when it moves, and provides pressure to ensure connection stability.

[0036] The working principle of this utility model is as follows: Select the appropriate pressure point position according to the size of the workpiece 4, rotate the threaded ring 503 to drive the screw 502 to move, the limiting plate 501 slides inside the U-shaped plate 7, and the pressure block 5 moves with the position of the screw 502 until the pressure block 5 moves to the appropriate position. During the movement of the pressure block 5, the connecting frame 802 changes its position as it moves, and at the same time drives the slider 805 to move, driving the guide rail 807 to compress. The left and right sides of the U-shaped plate 7 and the corresponding left and right sides of the bottom surface of the pressure block 5 are connected accordingly.

[0037] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A tensioning pull-down positioning fixture, comprising a processing table (1), characterized in that: A connecting seat (2) is fixedly installed at the bottom of the processing table (1), a fixed base plate (3) is fixedly installed at the top of the processing table (1), a workpiece (4) is set in the middle of the top surface of the processing table (1), an ejector cylinder (6) is fixedly installed inside the connecting seat (2), a connecting shaft (601) is fixedly connected to the top of the ejector cylinder (6), a U-shaped plate (7) is rotatably installed on the surface of the connecting shaft (601), a guide rod (701) is fixedly installed on the side of the U-shaped plate (7), a fixed rod (702) is rotatably installed at the bottom end of the guide rod (701), a threaded ring (503) is rotatably installed inside the top of the U-shaped plate (7), a screw (502) is installed in the internal thread of the threaded ring (503), a pressure block (5) is fixedly installed at the top of the screw (502), and support components (8) are fixedly connected to both the left and right sides of the U-shaped plate (7).

2. The tensioning pull-down positioning clamp according to claim 1, characterized in that: The bottom end of the fixing rod (702) is fixedly installed on the top end of the fixing base plate (3).

3. The tensioning pull-down positioning clamp according to claim 1, characterized in that: A limiting plate (501) is fixedly installed on one side of the bottom surface of the pressure block (5), and the limiting plate (501) is slidably installed inside the U-shaped plate (7).

4. The tensioning pull-down positioning clamp according to claim 1, characterized in that: The bottom end of the threaded ring (503) is integrally formed with a limiting ring (504), which is rotatably installed inside the top surface of the U-shaped plate (7). The outer wall of the threaded ring (503) is integrally formed with several protruding rods.

5. The tensioning pull-down positioning clamp according to claim 1, characterized in that: The support assembly (8) includes a support rod (801), a connecting frame (802) is rotatably mounted on one end of the support rod (801), a rotating ring (803) is rotatably mounted on the top end of the connecting frame (802), a transverse plate (804) is fixedly mounted on the side of the rotating ring (803), a slider (805) is fixedly mounted on the bottom end of the middle part of the transverse plate (804), a guide rail (807) is slidably mounted inside the slider (805), a spring (806) is movably sleeved on the surface of the guide rail (807), and a base frame (808) is fixedly connected to the top end of the guide rail (807).

6. The tensioning pull-down positioning clamp according to claim 5, characterized in that: The top surface of the base frame (808) is fixedly installed on the bottom surface of the pressure block (5), one end of the spring (806) is fixedly connected to the side of one end of the guide rail (807), and the other end of the spring (806) is fixedly connected to the side of the slider (805).

7. A tensioning pull-down positioning clamp according to claim 5, characterized in that: The side of the support rod (801) is fixedly connected to the side of the U-shaped plate (7).

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