A disc spring preloading compression device

Abstract

The utility model discloses a disc spring preloading compression device, the device is used for compressing disc spring in disc spring assembly, and disc spring is sleeved on the rod -shaped spare, and the outside sleeve of disc spring is equipped with the sleeve, and the outside sleeve of rod -shaped spare is equipped with the baffle ring and is installed with the lock nut, and the device includes disc spring compression mechanism, draw plate top utensil and sleeve wrench, and disc spring compression mechanism includes the barrel body, end cover and bottom cover, and end cover and bottom cover are fixed respectively in both ends of barrel body, is equipped with the first center hole on end cover, and the aperture is greater than the outside diameter of lock nut, and is equipped with the notch on lock nut, is equipped with the second center hole on bottom cover, and the aperture is greater than the outside diameter of draw plate top utensil, and draw plate top utensil is the tubular of one -sided opening, and the inside diameter of draw plate top utensil is greater than the outside diameter of the end of rod -shaped spare away from lock nut. The device simple structure, compression, remove and position adjustment are convenient, safe in utilization, can realize reliable, stable, convenient, effective compression to disc spring, improve the pre -tightening assembly precision of disc spring, promote the operation safety.

Description

Technical Field

[0001] This utility model belongs to the field of pre-tightening assembly technology of disc spring assemblies, specifically relating to a disc spring preload compression device. Background Technology

[0002] In actual industrial production applications, disc springs are characterized by short stroke, heavy load capacity, high stiffness, strong damping and vibration absorption capabilities, and variable stiffness. In industries such as heavy machinery, machine tools, and molds, disc springs are typically fitted onto rod-shaped parts such as piston rods, bolts, and shafts. The disc spring, rod-shaped parts, sleeves, retaining rings, and lock nuts constitute a disc spring assembly, used to absorb and buffer impact forces, such as for releasing pullers in clamping mechanisms or providing appropriate elastic force in molds.

[0003] During the assembly of disc spring assemblies, the disc springs need to be combined reasonably according to the specifications and quantity required by the design, and compressed to the design requirements. This process has the following problems: 1) Compression difficulty: Because the disc springs have a certain height in their free state, it is extremely difficult to compress and assemble them manually. Moreover, the disc springs are very easy to break out during the compression process, causing danger; 2) Inconvenience in moving and adjusting: When manually compressing disc springs, the movement and adjustment are not flexible enough, and it is difficult to accurately control the position and degree of compression of the disc springs; 3) Debugging risk: During the debugging process, if the stroke changes, the disc springs may fly out, causing safety hazards. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a disc spring preload compression device in view of the shortcomings of the prior art. The device has a simple structure, is convenient for compression, movement and position adjustment, and is safe to use. It can reliably, stably, conveniently and effectively compress disc springs without the need for large pressurizing equipment to complete the predetermined disc spring compression requirements, improve the pre-tightening assembly accuracy of disc springs and enhance operational safety.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a disc spring preload compression device, which is used to compress the disc spring in a disc spring assembly. The disc spring is sleeved on a rod-shaped part, and a sleeve is sleeved on the outer side of the disc spring. A retaining ring is sleeved on the outer side of the rod-shaped part and a locking nut is installed. The two ends of the disc spring are respectively limited by the sleeve and the retaining ring. The locking nut is used to press the retaining ring. The device includes a disc spring compression mechanism, a pull plate top tool, and a sleeve wrench. The disc spring compression mechanism includes a barrel body, an end cap, and a bottom cap. The end cap and the bottom cap are respectively fixed to the two ends of the barrel body. The end cap has a first central hole with a diameter larger than the outer diameter of the locking nut. The locking nut has a notch that matches the teeth of the socket wrench. The bottom cap has a second central hole with a diameter larger than the outer diameter of the pull plate top. The pull plate top is a cylindrical shape with one side opening. The inner diameter of the pull plate top is larger than the outer diameter of the end of the rod-shaped part away from the locking nut. The pull plate top is used to transmit the hydraulic pressure of the hydraulic three-jaw puller to the socket to compress the disc spring. The socket wrench is used to tighten the locking nut into place.

[0006] The main structure of this novel disc spring preload compression device consists of three parts: a disc spring compression mechanism, a pull plate top fixture, and a socket wrench. In use, first, the body of the disc spring compression mechanism is placed stably horizontally on a support structure such as a V-block. Then, the assembled disc spring assembly is smoothly inserted into the body through the second central hole, allowing the end of the rod-shaped part with the locking nut to protrude from the first central hole through the end cap, while the retaining ring contacts the end cap. Next, the pull plate top fixture is placed on the end of the rod-shaped part furthest from the locking nut. Then, a hydraulic three-jaw puller is placed at the pull plate top fixture. The hydraulic pressure of the puller is concentrated on the pull plate top fixture, smoothly applying force to compress the disc spring. Finally, the socket wrench, retaining ring, and end cap work together to position the disc spring in place. Finally, the teeth of the socket wrench are engaged with the notch on the locking nut, and the locking nut is tightened to the required torque, thus completing the disc spring compression.

[0007] Preferably, the inner side of the end cap is provided with an inner stepped stop, which is used to limit the position of the retaining ring. By designing an inner stepped stop on the inner side of the end cap to limit the position of the retaining ring, it is convenient to accurately control the position and compression degree of the disc spring, and ensure the preload assembly accuracy of the disc spring.

[0008] Preferably, the outer diameter of the bottom cover is larger than the outer diameter of the barrel body, and the bottom cover is used to position the three claws of the hydraulic three-jaw puller. Because the outer diameter of the bottom cover is larger than the outer diameter of the barrel body, the outer edge of the bottom cover is located outside the barrel body. Using the outer edge of the bottom cover as the positioning position of the three claws of the hydraulic three-jaw puller facilitates operation.

[0009] Preferably, a key block is mounted on the rod-shaped part, and the inner wall of the pull plate top fixture is provided with a keyway that matches the key block. The keyway on the inner wall of the pull plate top fixture facilitates matching the rod-shaped part with the key block, achieving better positioning of the rod-shaped part and thus enabling reliable, stable, convenient, and effective compression of the disc spring.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] (1) Convenient compression; In a safe environment, the device uses a hydraulic three-jaw puller as a pressurizing device, which is easy and labor-saving. It can achieve reliable, stable, convenient and effective compression of disc springs by using a small footprint and a small number of personnel for manual operation. It can complete the predetermined disc spring compression requirements without the need for large pressurizing equipment, thereby improving the pre-tightening assembly accuracy of disc springs.

[0012] (2) Easy to move and adjust position: The device has a simple structure, is easy to move and adjust position, has low requirements for the site of use, and can be conveniently used in safe environments and occasions;

[0013] (3) Safety in use: The disc spring compression mechanism adopts a closed design and is used in conjunction with a stable and reliable hydraulic three-jaw puller to compress the disc spring. The pressure is smooth and stable, which can improve the safety of operation. Attached Figure Description

[0014] Figure 1 This is an external view of the disc spring preload compression device in the embodiment;

[0015] Figure 2 This is a longitudinal sectional view of the disc spring preload compression device in the embodiment after disc spring compression.

[0016] Figure 3 This is a longitudinal sectional view of the disc spring preload compression device in an embodiment before disc spring compression.

[0017] Figure 4 This is a longitudinal sectional view of the end cap structure in the embodiment;

[0018] Figure 5 This is a longitudinal sectional view of the structure of the pull plate top fixture in the embodiment;

[0019] The specific reference numerals in the figure are as follows:

[0020] 1-Barrel body, 2-End cap, 21-First center hole, 22-Inner step stop, 3-Bottom cap, 31-Second center hole, 4-Pull plate top tool, 41-Keyway, 5-Socket wrench, 61-Disc spring, 62-Piston rod, 63-Key block, 64-Sleeve, 65-Retaining ring, 66-Locking nut, 67-Notch. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] The disc spring preload compression device of the embodiment, such as Figure 1 and Figure 2 As shown, this device is used to compress the disc spring 61 in the disc spring assembly. In this embodiment, the rod-shaped part in the disc spring assembly is the piston rod 62. A key block 63 is installed on the piston rod 62. The disc spring 61 is sleeved on the piston rod 62. A sleeve (i.e., bushing) 64 is sleeved on the outside of the disc spring 61. A retaining ring 65 is sleeved on the outside of the piston rod 62 and a locking nut 66 is installed. The two ends of the disc spring 61 are respectively limited by the sleeve 64 and the retaining ring 65. The locking nut 66 is used to press the retaining ring 65. The device includes a disc spring compression mechanism, a pull plate top tool 4, and a sleeve wrench 5. The disc spring compression mechanism includes a barrel body 1, an end cap 2, and a bottom cap 3. The end cap 2 and the bottom cap 3 are respectively fixed to the two ends of the barrel body 1 by screws. The outer diameter of the bottom cap 3 is larger than the outer diameter of the barrel body 1. The end cap 2 is provided with a first central hole 21, such as Figure 4 As shown, the diameter of the first central hole 21 is larger than the outer diameter of the locking nut 66. The inner side of the end cap 2 is provided with an inner stepped stop 22, which is used to limit the position of the retaining ring 65. The locking nut 66 has a notch 67 that matches the teeth of the socket wrench 5. The bottom cover 3 has a second central hole 31, the diameter of which is larger than the outer diameter of the pull plate top tool 4. The pull plate top tool 4 is a cylindrical shape with an opening on one side, such as... Figure 5 As shown, the inner diameter of the pull plate top 4 is larger than the outer diameter of the end of the piston rod 62 away from the locking nut 66. The inner wall of the pull plate top 4 is provided with a keyway 41 that matches the key block 63. The bottom cover 3 is used to position the three jaws of the hydraulic three-jaw puller (not shown in the figure). The pull plate top 4 is used to transmit the hydraulic pressure of the hydraulic three-jaw puller to the sleeve 64 to realize the compression of the disc spring 61. The sleeve wrench 5 is used to tighten the locking nut 66 into place.

[0023] When using the above-mentioned disc spring preload compression device, firstly, place the barrel 1 of the disc spring compression mechanism horizontally and stably on a support structure such as a V-block (not shown in the figure). Then, smoothly insert the assembled disc spring assembly into the barrel 1 through the second central hole 31, so that the end of the piston rod 62 with the locking nut 66 passes through the first central hole 21 and out of the end cover 2. At the same time, the retaining ring 65 is embedded in the inner stepped stop 22 and contacts the end cover 2. Then, the pull plate top 4 is put on the end of the piston rod 62 away from the locking nut 66. The state diagram at this time is as follows. Figure 3As shown; then, place a hydraulic three-jaw puller at the top of the pull plate 4, using the outer edge of the bottom cover 3 as the positioning position of the three jaws of the hydraulic three-jaw puller. Adjust and operate the hydraulic three-jaw puller so that the hydraulic pressure of the hydraulic three-jaw puller is concentrated on the top of the pull plate 4. The hydraulic three-jaw puller smoothly applies force to the top of the pull plate 4, so that the disc spring 61 is safely compressed. Finally, the sleeve 64, the retaining ring 65 and the inner step stop 22 on the inner side of the end cover 2 are positioned to compress the disc spring 61 into place. Finally, insert the teeth of the sleeve wrench 5 into the notch 67 on the locking nut 66 and tighten the locking nut 66 to the required torque, thus completing the compression of the disc spring 61. The state diagram at this time is as shown. Figure 2 As shown.

[0024] like Figure 2 As shown, after the disc spring 61 is compressed, the distance between the bottom surface of the pull plate top fixture 4 and the bottom surface of the bottom cover 3 is L1; Figure 3 As shown, before the disc spring 61 is compressed, the distance between the bottom surface of the pull plate top fixture 4 and the bottom surface of the bottom cover 3 is L2. By calculating the difference between L2 and L1, it can be determined whether the actual compression of the disc spring 61 meets the predetermined requirements.

[0025] The aforementioned disc spring preload compression device has a simple structure, is convenient for compression, movement, and position adjustment, and has low requirements for the site, making it easy to use in safe environments and occasions. In a safe environment, this device uses a hydraulic three-jaw puller as the pressurizing equipment, making it easy and labor-saving. It utilizes a small footprint and requires minimal personnel for manual operation, achieving reliable, stable, convenient, and effective compression of the disc spring, improving operational safety. It can fulfill the predetermined disc spring compression requirements without the need for large pressurizing equipment, thus improving the preload assembly accuracy of the disc spring.

Claims

1. A disc spring preload compression device, the device being used to compress a disc spring in a disc spring assembly, the disc spring being sleeved on a rod-shaped part, a sleeve being sleeved on the outer side of the disc spring, a retaining ring being sleeved on the outer side of the rod-shaped part and a locking nut being installed thereon, the two ends of the disc spring being respectively limited by the sleeve and the retaining ring, the locking nut being used to press the retaining ring, characterized in that, The device includes a disc spring compression mechanism, a pull plate top tool, and a socket wrench. The disc spring compression mechanism includes a barrel body, an end cap, and a bottom cap. The end cap and the bottom cap are respectively fixed to both ends of the barrel body. The end cap has a first central hole with a diameter larger than the outer diameter of the locking nut. The locking nut has a notch that matches the teeth of the socket wrench. The bottom cap has a second central hole with a diameter larger than the outer diameter of the pull plate top tool. The pull plate top tool is a cylindrical shape with one side opening. The inner diameter of the pull plate top tool is larger than the outer diameter of the end of the rod-shaped part away from the locking nut. The pull plate top tool is used to transmit the hydraulic pressure of the hydraulic three-jaw puller to the socket to compress the disc spring. The socket wrench is used to tighten the locking nut into place.

2. The disc spring preload compression device according to claim 1, characterized in that, The inner side of the end cap is provided with an inner stepped stop, which is used to limit the position of the retaining ring.

3. The disc spring preload compression device according to claim 1, characterized in that, The outer diameter of the bottom cover is larger than the outer diameter of the barrel body, and the bottom cover is used to position the three jaws of the hydraulic three-jaw puller.

4. The disc spring preload compression device according to claim 1, characterized in that, A key block is mounted on the rod-shaped part, and the inner wall of the pull plate top is provided with a keyway that matches the key block.

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