Spring pre-pressing tool

Abstract

The utility model provides a spring pre-pressing tool, which comprises a bottom plate, an air cylinder, a supporting plate and a pressing plate, the supporting plate is arranged on the upper end face of the bottom plate, a plurality of positioning columns are arranged on the supporting plate, a top plate is arranged above the bottom plate through supporting columns, and guide columns are arranged between the bottom plate and the top plate. The left side and the right side of the pressing plate are movably arranged on the guide columns in a sleeving mode through extension arms and can move back and forth along the guide columns, the air cylinder is arranged on the upper end face of the top plate, and the telescopic shaft end of the air cylinder downwards penetrates through the top plate and is detachably arranged on the pressing plate. According to the spring pre-pressing tool, the multiple positioning columns are arranged, the multiple springs can be pre-pressed at the same time, and the efficiency is relatively high; the telescopic shaft end of the air cylinder is detachably arranged on the inverted-T-shaped piece, the rectangular block of the inverted-T-shaped piece can be replaced according to the pre-pressing height, then adjustment of different pre-pressing heights is achieved, and the spring pre-pressing device is suitable for pre-pressing of springs of various specifications.

Description

Technical Field

[0001] The utility model belongs to the technical field related to spring elasticity, and in particular relates to a spring pre-compression tool. Background Art

[0002] A spring is a mechanical part that uses elasticity to work. Parts made of elastic materials deform under the action of external forces and return to their original shape after the external force is removed. In order to ensure that the spring meets the requirements when installed, the manufacturer will design a pre-stress height for the spring when producing the spring. For example, the spring is designed to be 12 cm long and the installation height is 10 cm long. At this time, we have a pre-stress height of the spring. The force generated by the pre-stress height difference of this spring is the pre-stress of the spring. Therefore, before use, the spring is usually pre-stressed. After the spring is pre-stressed, the deformation and stress of the spring can be controlled, thereby improving the stability and reliability of the spring; in addition, pre-stressing can ensure the initial state of the spring, thereby extending the life of the spring; the pre-stressed spring has better self-locking properties and is not easy to loosen. This requires a spring pre-stressing tool. Summary of the invention

[0003] The utility model provides a spring preloading tool, which is used for realizing the preloading of the spring and can adjust the preloading height according to the preloading requirement.

[0004] The technical solution adopted by the utility model is:

[0005] A spring preloading tool comprises a base plate, a cylinder, a support plate and a pressure plate. The upper end surface of the base plate is provided with a support plate, and a plurality of positioning columns are provided on the support plate. A top plate is provided above the base plate through supporting columns, and a guide column is provided between the base plate and the top plate. The left and right sides of the pressure plate are movably sleeved on the guide columns through extension arms and can move back and forth along the guide columns. The upper end surface of the top plate is provided on the cylinder, and the telescopic shaft end of the cylinder passes downward through the top plate and is detachably provided on the pressure plate.

[0006] Preferably, a plurality of threaded blind holes are formed on the support plate, the lower portion of the positioning column is a rod body with external threads, and the positioning column is fixed to the support plate through the threads of the rod body.

[0007] Preferably, an inverted T-shaped piece is provided on the top of the pressure plate, and the telescopic shaft end of the cylinder is detachably arranged on the inverted T-shaped piece; the inverted T-shaped piece includes an inverted T-shaped body and a rectangular block, the inverted T-shaped body is located in the center of the top plate of the pressure plate, and its two ends are fixed to the pressure plate with bolts, a vertical opening groove is provided at the bottom of the rectangular block, a fixed blind hole is provided at the top of the rectangular block, the rectangular block is arranged on the inverted T-shaped body through the vertical opening groove at the bottom and is locked with bolts, and the telescopic shaft end of the cylinder is inserted into the fixed blind hole of the rectangular block and is locked with bolts.

[0008] Preferably, a groove is provided on the upper surface of the base plate, and the groove runs through the front side surface of the base plate, guide grooves are provided on the opposite side walls of the groove, the support plate is arranged in the groove, guide strips matching the guide grooves are provided on the left and right sides of the support plate, and a pull ring is provided on the front side surface of the support plate.

[0009] Preferably, a limiting rod is provided on the rear side of the support plate, the limiting rod moves backward and passes through the rear side of the base plate, and a limiting block is provided at the rear end of the limiting rod.

[0010] Compared with the prior art, the beneficial effects of the utility model are: the spring prestressing tool is provided with a plurality of positioning columns, which can realize the simultaneous prestressing of multiple springs with relatively high efficiency; the telescopic shaft end of the cylinder is detachably arranged on the inverted T-shaped piece, and this design can replace the rectangular block of the inverted T-shaped piece according to the prestressing height, thereby realizing the adjustment of different prestressing heights, making it suitable for the prestressing of springs of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0012] Figure 2 It is a structural schematic diagram of the best embodiment of the utility model.

[0013] Figure 3 yes Figure 2 Structural breakdown diagram.

[0014] In the figure: 1, bottom plate; 2, cylinder; 3, support plate; 4, pressure plate; 5, positioning column; 6, top plate; 7, guide column; 8, inverted T-shaped body; 9, rectangular block; 10, groove; 11, pull ring; 12, limit rod; 13, limit block; 31, threaded blind hole; 32, guide strip; 51, rod body; 91, vertical opening groove; 92, fixed blind hole; 101, guide groove. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described below in combination with specific implementation methods. The drawings are only used for exemplary descriptions, and only show schematic diagrams rather than physical drawings, and cannot be understood as limitations of this patent; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0016] like Figure 1As shown, the spring preloading tool of the utility model comprises a bottom plate 1, a cylinder 2, a support plate 3, and a pressure plate 4. The upper end surface of the bottom plate 1 is provided with a support plate 3, and a plurality of positioning columns 5 are provided on the support plate 3. A top plate 6 is provided above the bottom plate 1 through a supporting column, and a guide column 7 is provided between the bottom plate 1 and the top plate 6. The left and right sides of the pressure plate 4 are movably sleeved on the guide column 7 through an extension arm, and can move back and forth along the guide column 7. The cylinder 2 is provided with the upper end surface of the top plate 6, and the telescopic shaft end of the cylinder 2 passes downward through the top plate and is detachably provided on the pressure plate 4. When in use, the springs are sleeved on the positioning columns one by one, and then the cylinder is started, and the telescopic shaft end of the cylinder extends to control the pressure plate to move downward, so that the spring is compressed for a certain period of time, and then the cylinder is controlled to rise, and the spring is taken out, and the preloading of the spring is completed.

[0017] In this embodiment, a control switch is also included, and the control switch controls the action of the cylinder in this way. The cylinder is a double-acting cylinder, and the gas circuit is connected to the double-acting cylinder through the pressure reducing valve and the two-position five-way solenoid valve in sequence. The two-position five-way solenoid valve is connected to the intermediate relay, and the intermediate relay is respectively connected to the time relay and the control switch, and the time relay is connected to the control switch. The specific process is that the control switch controls the time relay coil, the time relay delays the disconnection of the contacts, controls the intermediate relay coil, and the normally open contacts of the intermediate relay control the solenoid valve. When the control switch is pressed, the two-position five-way solenoid valve is energized, the control gas circuit is opened, and the cylinder extends. After 10 seconds, the solenoid valve is de-energized and the cylinder is reset. .

[0018] In order to ensure the stability of the spring placement, the thickness of the positioning column is generally adjusted according to the thickness of the spring. Therefore, the positioning column is detachably arranged on the support plate. Specifically, a plurality of threaded blind holes 31 are opened on the support plate 3, and the lower part of the positioning column 5 is a rod body 51 with an external thread. The positioning column 5 is fixed to the support plate 3 through its rod body thread.

[0019] Although the extension length of the cylinder depends on the gas pressure entering the cylinder, it is troublesome to change the telescopic length of the cylinder by adjusting the pressure of the cylinder. In order to adjust the pre-pressing height, the telescopic shaft end of the cylinder is connected to the pressure plate through an inverted T-shaped piece. By changing the height of the inverted T-shaped piece, the moving distance of the pressure plate can be effectively adjusted, thereby achieving different pre-pressing heights. Specifically, an inverted T-shaped piece is provided on the top of the pressure plate 4, and the telescopic shaft end of the cylinder 2 is detachably provided on the inverted T-shaped piece; the inverted T-shaped piece includes an inverted T-shaped body 8 and a rectangular block 9, the inverted T-shaped body 8 is located in the center of the top plate of the pressure plate 4, and its two ends are fixed to the pressure plate 4 with bolts, the bottom of the rectangular block 9 is provided with a vertical opening groove 91, the top of the rectangular block 9 is provided with a fixed blind hole 92, the rectangular block 9 is provided on the inverted T-shaped body 8 through the vertical opening groove 91 at the bottom thereof and is locked with bolts, and the telescopic shaft end of the cylinder 2 is inserted into the fixed blind hole 92 of the rectangular block 9 and is locked with bolts. Since the inverted T-shaped body and the rectangular block of the inverted T-shaped piece are detachably fixed by bolts, and the telescopic shaft end of the cylinder is detachably fixed to the rectangular block, different preload heights can be achieved by replacing rectangular blocks of different heights.

[0020] In order to facilitate the placement and removal of the spring, the support plate is movably placed on the bottom plate and can be pulled out and pushed in. Specifically, Figure 2 As shown, a groove 10 is provided on the upper end surface of the bottom plate 1, and the groove 10 runs through the front side surface of the bottom plate. The front-to-back length of the groove should not be less than the front-to-back length of the two pallets to ensure that the pallets can be pulled forward. A guide groove 101 is provided on the opposite side walls of the groove 10, and the pallet 3 is arranged in the groove 10. Guide strips 32 matching the guide groove 101 are provided on the left and right sides of the pallet 3, and a pull ring 11 is provided on the front side surface of the pallet 3.

[0021] In order to prevent the support plate from falling out of the groove, a limiting rod 12 is arranged on the rear side of the support plate 3 , and the limiting rod 12 moves backward through the rear side of the bottom plate, and a limiting block 13 is arranged at the rear end of the limiting rod 12 .

Claims

1. A spring preloading tool, characterized in that: It includes a base plate, a cylinder, a support plate, and a pressure plate. The upper end surface of the base plate is provided with a support plate, and a plurality of positioning columns are provided on the support plate. A top plate is provided above the base plate through a supporting column, and a guide column is provided between the base plate and the top plate. The left and right sides of the pressure plate are movably sleeved on the guide column through an extension arm and can move back and forth along the guide column. The upper end surface of the top plate is provided on the cylinder, and the telescopic shaft end of the cylinder passes downward through the top plate and is detachably provided on the pressure plate.

2. The spring preloading tool according to claim 1, characterized in that: The support plate is provided with a plurality of threaded blind holes, the lower part of the positioning column is a rod body with external threads, and the positioning column is fixed on the support plate through the threads of the rod body.

3. The spring preloading tool according to claim 1, characterized in that: An inverted T-shaped piece is provided on the top of the pressure plate, and the telescopic shaft end of the cylinder is detachably arranged on the inverted T-shaped piece; the inverted T-shaped piece includes an inverted T-shaped body and a rectangular block, the inverted T-shaped body is located in the center of the top plate of the pressure plate, and its two ends are fixed to the pressure plate with bolts, a vertical opening groove is provided at the bottom of the rectangular block, a fixed blind hole is provided at the top of the rectangular block, the rectangular block is arranged on the inverted T-shaped body through the vertical opening groove at the bottom and is locked with bolts, and the telescopic shaft end of the cylinder is inserted into the fixed blind hole of the rectangular block and is locked with bolts.

4. The spring preloading tool according to claim 1, characterized in that: A groove is provided on the upper surface of the bottom plate, and the groove runs through the front side of the bottom plate. A guide groove is provided on the opposite side wall of the groove. The support plate is arranged in the groove. Guide strips matching the guide groove are provided on the left and right sides of the support plate, and a pull ring is provided on the front side of the support plate.

5. The spring preloading tool according to claim 4, characterized in that: A limiting rod is arranged on the rear side of the supporting plate, and the limiting rod moves backwards and passes through the rear side of the bottom plate, and a limiting block is arranged at the rear end of the limiting rod.

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