Buffering pull rod assembling spring tool

Abstract

The utility model discloses a buffer pull rod assembling spring tool which comprises a tool support, a jack, an ejector rod, a sleeve, a nut and a buffer pull rod, the jack is installed in the tool support, the ejector rod is connected with the output end of the jack, the ejector rod is located in the buffer pull rod, and the sleeve is connected with the nut. The sleeve is placed on the top face of the tool support and sleeved on the upper portion of a pull rod head of the buffering pull rod 4, and the nut is in threaded connection with the pull rod head of the buffering pull rod. The jacking rod is driven by the jack to compress the spring, when the spring is compressed to the needed position, the spring is sleeved with the sleeve and fixed through the nut, low-torque and high-precision assembly is achieved, and the tool is suitable for rapid and reliable installation of the spring in a mechanical buffer system.

Description

Technical Field

[0001] This utility model belongs to the field of spring assembly tooling technology. Specifically, this utility model relates to a spring assembly tooling for a buffer tie rod. Background Technology

[0002] The spring assembly fixture for buffer rods is a key device used to achieve precise installation, stress adjustment, and buffer force control of buffer springs in mechanical systems. Its core function is to reduce the damage of impact loads to the rod system through modular structure and elastic component combination, and to adapt to different working conditions.

[0003] The existing product assembly can be completed by directly tightening the sleeve and nut. However, this assembly method requires a large tightening torque for the nut due to the long spring compression stroke. This will not only damage the threads of the parts, but also damage the paint on the surface of the parts. Utility Model Content

[0004] This utility model provides a spring assembly fixture for a buffer tie rod, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a buffer tie rod assembly spring fixture, including a fixture bracket, a jack, a push rod, a sleeve, a nut, and a buffer tie rod. The jack is installed inside the fixture bracket, the push rod is connected to the output end of the jack, and the push rod is located inside the buffer tie rod.

[0006] The buffer rod includes a rod seat sleeved on the outside of the top rod, a rod head slidably connected to the rod seat, a compression spring sleeved on the part of the rod head located inside the rod seat, and a safety stop pin that passes through the rod seat.

[0007] The sleeve is placed on the top surface of the tooling bracket and fitted onto the upper part of the pull rod head of the buffer pull rod, and the nut is threadedly connected to the upper part of the pull rod head of the buffer pull rod.

[0008] The beneficial effects of adopting the above technical solutions are:

[0009] First, this tooling allows for spring assembly with lower torque, significantly reducing the labor intensity of operators. Furthermore, the precise fit and stable fixation between components achieve high-precision assembly. Actual test data shows that using this tooling for spring assembly requires only about 60% of the torque required by traditional methods, greatly improving assembly efficiency and quality.

[0010] Second, thanks to the specially designed safety stop pin in this tooling, when the spring is compressed to the designated position, it is fitted into the sleeve and fixed with a nut. The safety stop pin can also be inserted into the corresponding slot or hole to lock the spring firmly and prevent it from rebounding, which significantly improves the safety of production operations and allows operators to work with greater peace of mind.

[0011] Third, whether it is a car shock absorption system, an industrial equipment buffer device, or a mechanical component that relies on springs to achieve a buffering function, this tooling can quickly and reliably complete the installation of springs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram showing the buffer rod in the assembly stage;

[0013] Figure 2 This is a schematic diagram of the buffer rod in its pre-assembly state;

[0014] Figure 3 This is a schematic diagram of the buffer rod in its assembled state;

[0015] in:

[0016] 1. Tooling bracket; 2. Jack; 3. Top rod; 4. Buffer rod; 41. Rod head; 42. Compression spring; 43. Rod seat; 44. Safety stop pin; 5. Sleeve; 6. Nut. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0018] Specifically, such as Figures 1 to 3 As shown, a spring assembly fixture for a buffer tie rod is characterized by comprising a fixture bracket 1, a jack 2, a push rod 3, a sleeve 5, a nut 6, and a buffer tie rod 4. The jack 2 is installed inside the fixture bracket 1, the push rod 3 is connected to the output end of the jack 2, and the push rod 3 is located inside the buffer tie rod 4.

[0019] It should be noted that the spring compression force is converted into the axial thrust of the push rod 3 by the jack 2, avoiding the nut from directly bearing high load, thus achieving damage-free assembly, low-torque operation, and high-precision positioning.

[0020] The tooling bracket 1 is used to support the overall structure, the jack 2 provides controllable thrust, and the push rod 3 is used to extend into the buffer tie rod 4 to compress the spring. The tooling bracket 1 is made of equilateral angle steel (50mm×50mm×4mm) welded to the steel plate base (15mm) and the steel plate top plate (15mm). The top steel plate has a circular through hole (diameter φ24mm) that communicates with the front groove so that the workpiece can be placed.

[0021] The preferred type of jack is the screw jack (model QYL-5T, rated load 50kN, stroke 150mm), with a handle equipped with a force-saving lever (force-saving ratio 1:5), and a rotational torque ≤8N・m.

[0022] The buffer rod 4 includes a rod seat 43 sleeved on the outside of the top rod 3, a rod head 41 slidably connected to the rod seat 43, a compression spring 42 sleeved on the part of the rod head 41 located inside the rod seat 43, and a safety stop pin 44 that passes through the rod seat 43.

[0023] It should be noted that during assembly, the pull rod head 41, the compression spring 42, and the pull rod seat 43 are assembled together first, and then the safety stop pin 44 is assembled on the tooling.

[0024] The compression spring 42 is set to a free length of 470mm, and is compressed to 400mm during assembly.

[0025] The tie rod seat 43 is configured with a φ10mm safety stop pin hole in the middle.

[0026] The safety stop pin 44 is set with a diameter of φ10mm, a length of 70mm, and a 30° chamfer at the end.

[0027] The sleeve 5 is placed on the top surface of the tooling bracket 1 and sleeved on the upper part of the pull rod head 41 of the buffer pull rod 4. The nut 6 is threadedly connected to the upper part of the pull rod head 41 of the buffer pull rod 4.

[0028] It should be noted that the length of sleeve 5 should be such that it can be fully screwed into the nut after the spring is compressed;

[0029] In addition, the sleeve is fitted over the spring and related components, providing a stable support frame for the entire structure and ensuring that the components maintain the accuracy of their relative positions during assembly; the nut, through its cooperation with the screw (which may be a push rod or a threaded structure on other related components), further tightens the components and prevents loosening during assembly.

[0030] The specific working method is described below using specific embodiments: Example 1

[0031] (1) Pre-assembly: Pass the pull rod head 41 through the compression spring 42 and insert it into the inner hole of the pull rod seat 43. The total length of the spring in its free state is 470mm.

[0032] (2) Fixture positioning: The top rod 3 passes through the through hole of the fixture bracket, the front boss is inserted into the center hole of the tie rod seat, and the whole is placed on the top surface of the jack to ensure coaxiality.

[0033] (3) Spring compression: Rotate the jack handle at a constant speed, and the jack rod rises to compress the spring to 400mm (stroke 70mm).

[0034] (4) Auxiliary fixing: Sleeve 5 is inserted into the pull rod head, and nut 6 is hand-tightened until it contacts the end face of sleeve 5 to fix the position of sleeve 5.

[0035] (5) Unloading assembly: Loosen the self-locking of jack 2, and the push rod 3 will slowly descend with the jack. After the spring potential energy is completely transferred to the sleeve 5 and nut 6, take out the push rod 3, insert the safety stop pin 44, and finally remove the sleeve 5 and nut 6. Example 2

[0036] After pre-assembling the pull rod head 41, compression spring 42, and pull rod seat 43, the pull rod head external thread is covered by the sleeve 5, and the nut 6 is tightened directly to force the spring to compress. The spring compression state is fixed by the friction of the nut 6.

[0037] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A spring assembly fixture for a buffer tie rod, characterized in that, It includes a tooling bracket (1), a jack (2), a push rod (3), a sleeve (5), a nut (6), and a buffer rod (4). The jack (2) is installed inside the tooling bracket (1), the push rod (3) is connected to the output end of the jack (2), and the push rod (3) is located inside the buffer rod (4). The buffer rod (4) includes a rod seat (43) sleeved on the outside of the top rod (3), a rod head (41) slidably connected to the rod seat (43), a compression spring (42) sleeved on the part of the rod head (41) located inside the rod seat (43), and a safety stop pin (44) that passes through the rod seat (43). The sleeve (5) is placed on the top surface of the tooling bracket (1) and sleeved on the upper part of the pull rod head (41) of the buffer pull rod (4). The nut (6) is threadedly connected to the upper part of the pull rod head (41) of the buffer pull rod (4).

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