An assembly device for a helical spring shock absorber and method of use

Abstract

The application discloses a kind of assembling device and use method of helical spring shock absorber, including equipment bed, screw drive unit, spring protection assembly, spring fixing seat assembly;The screw drive unit, spring protection assembly, spring fixing seat assembly are all installed on equipment bed, spring protection assembly is arranged between screw drive unit and spring fixing seat assembly, and is sequentially arranged along spring axial direction;The spring fixing seat assembly includes long guide rail, long guide rail is arranged on the lower side of front support near spring mounting end, baffle is arranged above long guide rail and can slide along long guide rail, short guide rail is arranged on the side of front support away from spring mounting end, and stopper is assembled on short guide rail, and baffle can slide and tightly clamp spring and be fixed with front support.It can be adapted to heavy spring assembly, has good safety protection effect, accurate and controllable stroke, and effectively improves assembly efficiency and stability.

Description

Technical Field

[0001] This invention belongs to the field of shock absorber technology, specifically relating to an assembly device and a method for using a helical spring shock absorber. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Coil spring shock absorbers are widely used in special vehicle suspension systems, and their assembly quality directly affects the vehicle's driving stability, handling, and operational safety. Coil springs themselves do not have damping capabilities; when used in automotive suspensions, they must be paired with shock absorbers. Integrated coil spring shock absorbers require pre-assembly using specialized equipment before final vehicle assembly to meet the overall vehicle assembly requirements.

[0004] Currently, the assembly equipment used for helical spring shock absorbers is mainly divided into two categories: The first type is simple disassembly and assembly tooling, such as the disassembly and assembly tooling disclosed in patent CN202121184788.8. Although it has the advantages of simple structure, low cost, convenient operation, and saving manpower and time, it is only suitable for light passenger car coil springs. Its load-bearing capacity and structural rigidity are insufficient, and it cannot meet the assembly requirements of heavy coil springs for special vehicles, thus limiting its scope of application.

[0005] The second category is hydraulically driven heavy-duty assembly equipment, such as the heavy-duty helical spring shock absorber assembly equipment disclosed in patent CN201910703879.9. This equipment uses a hydraulic control system to drive the hydraulic cylinder piston rod to achieve spring compression, which can meet the requirements of heavy-duty spring assembly. However, the overall purchase cost is high. The hydraulic system is prone to fluid leakage during long-term use, which not only pollutes the production environment but also causes a decrease in transmission efficiency and unstable equipment operation. At the same time, the hydraulic components have complex structures, are difficult to troubleshoot, are difficult to repair, and have high maintenance costs, which seriously limits their promotion and use in the mass production and on-site assembly of special vehicles. Summary of the Invention

[0006] To address the aforementioned issues, this invention provides an assembly device and method for using a helical spring shock absorber, which is adaptable to heavy-duty spring assembly, offers good safety protection, provides precise and controllable stroke, and effectively improves assembly efficiency and stability.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An assembly device and method for using a helical spring shock absorber include a machine bed, a helical drive unit, a spring protection assembly, and a spring fixing seat assembly; the helical drive unit, the spring protection assembly, and the spring fixing seat assembly are all mounted on the machine bed, and the spring protection assembly is disposed between the helical drive unit and the spring fixing seat assembly, arranged sequentially along the spring axis; The spring mounting assembly includes a long guide rail, which is located on the lower side of the front support near the spring mounting end. A baffle is located above the long guide rail and can slide along the long guide rail. A short guide rail is located on the side of the front support away from the spring mounting end. A stop block is mounted on the short guide rail. The baffle can slide to clamp the spring and fix it to the front support.

[0008] As a further technical solution, the equipment bed includes a first base plate, the first base plate and a second base plate are disposed at the bottom of the equipment bed, short reinforcing ribs and long reinforcing ribs are disposed on the inner side of the side plate for reinforcement, the side plate is disposed above the first base plate and the second base plate, the side plate has two rows of through holes, the reducer support is disposed on the inner side of the side plate and the installation height can be adjusted along the through holes, the front support is disposed above the first base plate and fixed to the side plate, the fixing plate is disposed between the side plates for connection and reinforcement, the lower support is disposed above the second base plate, the upper cover is disposed above the lower support, and the lower support and the upper cover together support the screw drive unit.

[0009] As a further technical solution, the screw transmission unit includes a gear transmission reducer, which is an integral structure with the motor and is located above the reducer support. The output end of the gear transmission reducer is connected to the spline end of the lead screw. The lead screw support is located in the round hole of the reducer support. The lead screw nut is located inside the inner support tube and fixed to the inner support tube. The lead screw nut and the inner support tube are fitted onto the lead screw. The outer support tube is fitted onto the outside of the inner support tube. One end of the outer support tube is located on the reducer support, and the other end is located between the lower support and the upper cover. The connecting sleeve is located at the exposed end of the inner support tube for connecting to the lower support of the spring. The limit switch bracket is located on the lower support.

[0010] As a further technical solution, the screw transmission unit also includes a mounting key, a second bearing sleeved on the non-splined end of the screw and limited thereto, a first bearing assembly sleeved on the splined end of the screw, a round nut and a round nut retaining washer disposed on the splined end of the screw and fastening the first bearing, a mounting key disposed in the splined groove of the screw to realize the transmission connection, a positioning pin disposed between the screw nut and the inner support tube to realize the fixed connection, and a guide key disposed on the side of the outer support tube.

[0011] As a further technical solution, the limit switch is mounted on the limit switch bracket, and the switch collision block is mounted on the side of the inner support tube. When the inner support tube moves to the preset position, the switch collision block triggers the limit switch to realize spring compression stroke control, limit protection and motor start / stop control.

[0012] As a further technical solution, the outer support tube and the inner support tube are coaxially mounted. The inner support tube moves linearly back and forth along the outer support tube under the drive of the screw, converting the rotational motion into linear compression motion to complete the compression and reset of the spring.

[0013] As a further technical solution, the spring protection assembly includes a base plate, which is set at the corresponding position of the side plate according to the length of the spring. The lower arc seat is assembled in the opening groove of the base plate, the clamping plate is pressed at both ends of the lower arc seat and fixed to the side plate, and the upper arc seat is set above the lower arc seat. The two can be opened and closed to form a closed protective cavity after closing.

[0014] As a further technical solution, the long guide rail is disposed above the stop block, the stop block is slidably mounted on the short guide rail, and the short guide rail is fixedly mounted on the front support.

[0015] As a further technical solution, the baffle clamping spring and shock absorber are fixedly mounted on the front support, and the stop block cooperates with the short guide rail to realize the sliding limit and positioning of the baffle.

[0016] The method for using the assembly device of the coil spring shock absorber includes the following steps: First, perform pre-assembly by connecting the lower spring support to the thin end pin of the shock absorber and installing them together into the spring body; then, hoist the spring into the spring protection assembly, insert the lower spring support into the connecting sleeve at the end of the inner support tube, install the other end of the spring into the spring fixing seat assembly, lock the baffle and close the upper arc seat and the lower arc seat; Start the motor mounted on the reducer support, drive the lead screw to rotate, move the inner support tube to compress the spring to the preset position, and stop the motor after the limit switch mounted on the lower support is triggered; connect the upper support of the shock absorber to the thick end of the shock absorber, and tighten the spring with the process screw; the motor reverses to drive the spring to reset, unlock the baffle, open the protective structure, remove the process screw, and take out the assembled shock absorber assembly.

[0017] Compared with the prior art, the advantages and positive effects of this invention are: The side plate of the machine bed of this invention is provided with multi-position adjustment through holes, which can flexibly adjust the installation position of the screw drive unit and the spring protection assembly to adapt to the assembly requirements of heavy-duty screw springs of different specifications. The screw drive unit smoothly converts the rotational motion into linear motion. With the guidance and constraint of the inner support tube, outer support tube and guide key, the spring compression process is smooth. Then, through the spring fixing seat assembly, the spring and shock absorber are quickly positioned and clamped by the long guide rail, the baffle welded together and the short guide rail and the stop block sliding locking cooperation, which effectively avoids assembly deviation. After the spring protection assembly is closed, it forms a closed protective cavity. At the same time, with the mechanical limit protection of the limit switch and the switch collision block, the operation safety is ensured, the compression stroke is precisely controlled, and the assembly stability and safety are improved. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0019] Figure 1 This is a front view of the assembly device for the helical spring shock absorber of the present invention; Figure 2 This is a top view of the assembly device for the helical spring shock absorber of the present invention; Figure 3 This is a left view of the assembly device for the helical spring shock absorber of the present invention; Figure 4 This is a front view of the bed of the device of the present invention; Figure 5 This is a top view of the bed of the device of the present invention; Figure 6 This is a left view of the bed of the device of the present invention; Figure 7 This is a view of the bed of the device according to the present invention from direction A; Figure 8 This is a schematic diagram of the assembly structure of the lower support and upper cover of the machine bed of the present invention; In the diagram: 1. Equipment bed; 101. First base plate; 102. Short reinforcing rib; 103. Reducer support; 104. Second base plate; 105. Side plate; 106. Long reinforcing rib; 107. Front support; 108. Fixing plate; 109. Lower support; 110. Upper cover; 111. First bolt; 112. Spring washer; 113. Second bolt; 114. Third bolt; 115. First nut; 2. Screw drive unit; 201. Gear reducer; 202. Motor; 203. Fourth bolt; 204. First washer; 205. Switch collision block; 206. Switch mounting plate; 207. Fifth bolt; 208. Second washer; 209. Limit switch; 210. Mounting key; 211. Round nut; 212. Round nut retaining washer; 213. First bearing; 214. Second bearing; 215. Positioning pin; 216. Threaded nut; 217. Lead screw; 218. Outer support tube; 219. Third washer; 220. Sixth bolt; 221. Guide key; 222. Inner support tube; 223. Connecting sleeve; 224. Limit switch bracket; 225. Seventh bolt; 3. Spring protection assembly; 301, base plate, 302, clamping plate, 303, upper arc seat, 304, lower arc seat, 305, eighth bolt, 306, second nut, 307, ninth bolt, 308, third nut; 4. Spring mounting bracket assembly; 401, long guide rail, 402, baffle, 403, short guide rail, 404, tenth bolt, 405, stop block. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] Example 1: The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses an assembly device for a helical spring shock absorber, such as... Figure 1 , Figure 2 as well as Figure 3 As shown, it includes a machine bed 1, a screw drive unit 2, a spring protection assembly 3, and a spring fixing seat assembly 4; the screw drive unit 2, the spring protection assembly 3, and the spring fixing seat assembly 4 are all installed on the machine bed 1, and the spring protection assembly 3 is arranged between the screw drive unit 2 and the spring fixing seat assembly 4, and are arranged sequentially along the spring axis. The spring mounting assembly 4 includes a long guide rail 401, which is located on the lower side of the front support 107 near the spring mounting end. A baffle 402 is located above the long guide rail 401 and can slide along the long guide rail 401. A short guide rail 403 is located on the side of the front support 107 away from the spring mounting end. A stop block 405 is mounted on the short guide rail 403. The baffle 402 can slide to clamp the spring and is fixed to the front support 107.

[0022] Specifically, the side plate 105 of the machine bed 1 is provided with multi-position adjustment through holes, which can flexibly adjust the installation position of the screw transmission unit 2 and the spring protection assembly 3 to adapt to the assembly requirements of heavy-duty screw springs of different specifications. The screw transmission unit 2 smoothly converts the rotational motion into linear motion. With the guidance and constraint of the inner support tube 222, the outer support tube 218 and the guide key 221, the spring compression process is smooth. Then, through the spring fixing seat assembly 4, the long guide rail 401 and the baffle 402 are welded together, and the short guide rail 403 and the stop block 405 are slidably locked together, so that the spring and the shock absorber can be quickly positioned and clamped, effectively avoiding assembly misalignment. After the spring protection assembly 3 is closed, it forms a closed protective cavity. At the same time, with the mechanical limit protection of the limit switch 209 and the switch collision block 205, the operation safety is ensured, the compression stroke is accurately controlled, and the assembly stability and safety are improved.

[0023] like Figures 4 to 8As shown, the equipment bed 1 includes a first base plate 101, the first base plate 101 and the second base plate 104 are disposed at the bottom of the equipment bed 1, short reinforcing ribs 102 and long reinforcing ribs 106 are disposed on the inner side of the side plate 105 for reinforcement, the side plate 105 is disposed above the first base plate 101 and the second base plate 104, the side plate 105 has two rows of through holes, the reducer support 103 is disposed on the inner side of the side plate 105 and the installation height can be adjusted along the through holes, the front support 107 is disposed above the first base plate 101 and fixed to the side plate 105, the fixing plate 108 is disposed between the side plates 105 for connection and reinforcement, the lower support 109 is disposed above the second base plate 104, the upper cover 110 is disposed above the lower support 109, the lower support 109 and the upper cover 110 together support the screw drive unit 2.

[0024] Specifically, the machine bed 1 adopts an integral welded frame to form a rigid support structure. The first base plate 101 and the second base plate 104 serve as the bottom base. The short reinforcing ribs 102 and the long reinforcing ribs 106 are arranged close to the inner side of the side plate 105 to enhance the bending and torsional resistance of the side plate 105. The side plate 105 is vertically set on the first base plate 101 and the second base plate 104. The fixing plate 108 connects the two side plates 105 laterally, so that the overall frame forms a stable rectangular structure.

[0025] The side plate 105 has two rows of through holes, one above the other. The reducer support 103 is installed inside the side plate 105 using these through holes, and its position can be adjusted according to the spring length, improving the versatility of the device. The front support 107 is fixed above the first base plate 101 and is used to install the spring fixing component. The lower support 109 is fixed above the second base plate 104, and the upper cover 110 covers the top of the lower support 109. Together, they provide stable support for the screw drive component. The first bolt 111 and the spring washer 112 are used to fasten the reinforcing rib to the side plate 105. The second bolt 113 is used to connect the side plate 105 to the base plate. The third bolt 114 and the first nut 115 are used to fix the reducer support 103 to the side plate 105, ensuring that the overall connection is firm and reliable.

[0026] The screw drive unit 2 includes a gear drive reducer 201, which is an integral structure with the motor 202 and is located above the reducer support 103. The output end of the gear drive reducer 201 is connected to the spline end of the lead screw 217. The lead screw 217 is supported and located in the round hole of the reducer support 103. The lead screw nut 216 is located inside the inner support tube 222 and fixed to the inner support tube 222. The lead screw nut 216 and the inner support tube 222 are fitted onto the lead screw 217. The outer support tube 218 is fitted onto the outside of the inner support tube 222. One end of the outer support tube 218 is located on the reducer support 103, and the other end is located between the lower support 109 and the upper cover 110. The connecting sleeve 223 is located at the exposed end of the inner support tube 222 for connecting to the lower spring support. The limit switch bracket 224 is located on the lower support 109.

[0027] Specifically, the screw drive unit 2 uses a motor 202 and a gear transmission reducer 201 as power sources. The two are integrated structures and are installed above the reducer support 103. The output end of the reducer is connected to the lead screw 217, which is supported in the round hole of the reducer support 103 to ensure smooth rotation. The nut 216 is installed inside the inner support tube 222 and fixed to the inner support tube 222. The whole is fitted on the lead screw 217. The outer support tube 218 is coaxially sleeved on the outside of the inner support tube 222. One end is connected to the reducer support 103, and the other end is clamped and fixed by the lower support 109 and the upper cover 110 to form a stable transmission guide structure.

[0028] The connecting sleeve 223 is located at the exposed end of the inner support tube 222 for precise docking with the lower spring support. The limit switch bracket 224 is fixed on the lower support 109, which can smoothly convert rotational motion into linear reciprocating motion, ensuring uniform power transmission and providing stable and reliable compression power for the heavy-duty spring, thus guaranteeing a smooth and controllable compression process. The fourth bolt 203 and the first washer 204 are used to fix the reducer to the support, and the seventh bolt 225 is used to connect the limit switch bracket 224 to the lower support 109, ensuring that all components are securely installed.

[0029] The screw drive unit 2 also includes a mounting key 210, a second bearing 214 sleeved on the non-splined end of the lead screw 217 and limited thereto, a first bearing 213 mounted on the splined end of the lead screw 217, a round nut 211 and a round nut retaining washer 212 mounted on the splined end of the lead screw 217 and fastening the first bearing 213, a mounting key 210 mounted in the splined groove of the lead screw 217 to achieve transmission connection, a positioning pin 215 mounted between the nut 216 and the inner support tube 222 to achieve fixed connection, and a guide key 221 mounted on the side of the outer support tube 218.

[0030] Specifically, bearings are configured at both ends of the lead screw 217 to achieve stable support. The second bearing 214 is sleeved on the non-spline end of the lead screw 217 to play an axial limiting role. The first bearing 213 is installed on the spline end of the lead screw 217 to support the rotation of the lead screw 217. The mounting key 210 is embedded in the spline groove of the lead screw 217 to ensure stable torque transmission and avoid slippage.

[0031] The lead screw nut 216 and the inner support tube 222 are connected as one unit by a locating pin 215 to prevent relative rotation and ensure synchronous movement. The guide key 221 is fixed to the side of the outer support tube 218 and cooperates with the inner support tube 222 to form a linear guide, restricting the circumferential rotation of the inner support tube 222 and allowing it to move only axially. The combination of multiple supports and guides ensures smooth rotation of the lead screw 217, precise movement of the inner support tube 222, and no jamming during spring compression, thus improving transmission accuracy and operational stability. The round nut 211 and round nut retaining washer 212 are used to lock and prevent loosening of the first bearing 213, while the sixth bolt 220 and the third washer 219 are used to fix the guide key 221 and the outer support tube 218, ensuring that the bearing and guide components are securely installed.

[0032] Limit switch 209 is mounted on limit switch bracket 224, and switch collision block 205 is mounted on the side of inner support tube 222. When inner support tube 222 moves to a preset position, switch collision block 205 triggers limit switch 209 to realize spring compression stroke control, limit protection and motor start / stop control.

[0033] Specifically, the limit switch 209 is mounted on the limit switch bracket 224, and the switch collision block 205 is fixed on the side of the inner support tube 222 and moves synchronously with the inner support tube 222. When the inner support tube 222 drives the spring to compress to the preset position, the switch collision block 205 triggers the limit switch 209, immediately controlling the motor 202 to stop running, thus achieving precise positioning and automatic shutdown.

[0034] The mechanical triggering structure offers fast response and high reliability. It strictly limits the spring compression stroke, preventing overtravel and providing hard limit protection to effectively prevent equipment damage and accidents, while also improving assembly accuracy and operational safety. Specifically, the fifth bolt 207 and the second washer 208 are used to securely connect the limit switch 209 to the limit switch bracket 224, ensuring accurate switch positioning.

[0035] The outer support tube 218 and the inner support tube 222 are coaxially mounted. The inner support tube 222 moves linearly back and forth along the outer support tube 218 under the drive of the lead screw 217, converting the rotational motion into linear compression motion, thus completing the compression and reset of the spring.

[0036] The spring protection assembly 3 includes a base plate 301, which is set at a corresponding position on the side plate 105 according to the length of the spring. The lower arc seat 304 is assembled in the opening groove of the base plate 301. The clamping plate 302 is pressed on both ends of the lower arc seat 304 and fixed to the side plate 105. The upper arc seat 303 is set above the lower arc seat 304. The two can be opened and closed to form a closed protective cavity after closing.

[0037] Specifically, the base plate 301 is installed at the corresponding position on the side plate 105 according to the length of the spring. The lower arc seat 304 is embedded in the opening groove of the base plate 301 for positioning. The clamping plate 302 is pressed on both ends of the lower arc seat 304 to prevent the lower arc seat 304 from moving axially and radially. The upper arc seat 303 and the lower arc seat 304 are connected by an openable type. It is opened when hoisting the spring and closed after installation to form a fully enclosed protective cavity, which can effectively prevent the spring from accidentally popping out under high pressure and fully protect the personal safety of the operator.

[0038] The opening and closing structure design makes it easy to install and remove the spring, provides high sealing protection, and is suitable for high-risk assembly scenarios of heavy-duty springs. Specifically, the ninth bolt 307 and the third nut 308 are used to fix the base plate 301 and the side plate 105, while the eighth bolt 305 and the second nut 306 are used to connect the clamping plate 302 and the side plate 105, and the upper arc seat 303 and the lower arc seat 304, ensuring that the protective components are firmly installed.

[0039] The long guide rail 401 is positioned above the stop block 405, which is slidably mounted on the short guide rail 403. The short guide rail 403 is fixedly mounted on the front support 107. The baffle 402 is fixedly mounted on the front support 107 after clamping the spring and the shock absorber. The stop block 405 cooperates with the short guide rail 403 to achieve sliding limit and positioning of the baffle 402.

[0040] Specifically, the short guide rail 403 is fixed to the front support 107, the stop block 405 is slidably mounted on the short guide rail 403, and the long guide rail 401 is fixed above the stop block 405, forming an adjustable sliding support structure. The baffle 402 is placed on the long guide rail 401 and can slide freely along the guide rail to adjust its position. After clamping the spring and shock absorber, it is locked in place, achieving rapid positioning and clamping, preventing spring displacement during assembly, ensuring the coaxiality of the shock absorber and spring, and improving assembly quality. The stop block 405 and the short guide rail 403 cooperate to limit the sliding stroke of the baffle 402, ensuring accurate positioning, simple operation, and improved assembly efficiency. The tenth bolt 404 is used to lock the baffle 402 to the front support 107, ensuring a stable clamping state.

[0041] Example 2: Based on Example 1, this example provides a method for using an assembly device for a helical spring shock absorber, including the following steps: First, perform pre-assembly by connecting the lower spring support to the thin end pin of the shock absorber and installing them together into the spring body; then, hoist the spring into the spring protection assembly 3, insert the lower spring support into the connecting sleeve 223 located at the end of the inner support tube 222, install the other end of the spring into the spring fixing seat assembly 4, lock the baffle 402 and close the upper arc seat 303 and the lower arc seat 304; Start the motor 202 mounted on the reducer support 103, drive the lead screw 217 to rotate, and move the inner support tube 222 to compress the spring to the preset position. After the limit switch 209 mounted on the lower support 109 is triggered, the motor stops. Connect the upper support of the shock absorber to the thick end of the shock absorber, and tighten the spring with the process screw. The motor 202 reverses to drive the spring to reset, unlock the baffle 402, open the protective structure, remove the process screw, and take out the assembled shock absorber assembly.

[0042] Specifically, first, connect the lower spring support to the thin end of the shock absorber using a pin. After the pin is installed in place, insert a cotter pin and bend it to lock it in place to prevent the pin from coming loose. Then, install the connected lower spring support and the shock absorber together into the coil spring to be assembled, so that the shock absorber and the spring initially form a combination, preparing for subsequent assembly.

[0043] The assembled spring and shock absorber are hoisted into the spring protection assembly 3. The position is adjusted so that the lower support of the spring is precisely inserted into the connecting sleeve 223 at the end of the inner support tube 222, so as to achieve reliable connection of the transmission end. The other end of the spring is placed stably in the installation position of the spring fixing seat assembly 4. The baffle 402 is pushed to slide along the guide rail so that the baffle 402 tightly clamps the spring and the outer periphery of the shock absorber. After positioning is completed, the baffle 402 is locked. Then the upper arc seat 303 and the lower arc seat 304 of the spring protection assembly 3 are closed so that the spring is in a closed protective space to avoid safety hazards during compression.

[0044] The motor 202, mounted on the reducer support 103, is started. The motor 202 drives the gear transmission reducer 201 to run, which in turn drives the lead screw 217 to rotate synchronously. The lead screw 217 drives the inner support tube 222 to move linearly along the outer support tube 218 through the lead screw nut 216, which smoothly pushes the lower support of the spring to move, thereby achieving uniform compression of the helical spring. When the inner support tube 222 moves to the preset assembly position, the switch collision block 205 on the inner support tube 222 triggers the limit switch 209. The limit switch 209 immediately sends a signal to control the motor 202 to stop running, and the spring remains in the set compression state.

[0045] Keeping the spring compressed, connect the upper support of the shock absorber to the thick end of the shock absorber using a pin; then insert the process screws along the bolt holes of the upper support of the shock absorber, tighten the process screws and make their ends press against the spring end face to prevent the spring from returning to its original position, thus achieving reliable locking between the shock absorber and the spring and completing the assembly.

[0046] The control motor 202 rotates in reverse, driving the lead screw 217, lead nut 216 and inner support tube 222 to move in the opposite direction, so that the helical spring slowly returns to its free state; after the spring is fully reset, the baffle 402 of the spring fixing seat assembly 4 is unlocked to release the clamping constraint on the spring and the shock absorber; the upper arc seat 303 and lower arc seat 304 of the spring protection assembly 3 are opened, the process screws used to tighten the spring are removed, and finally the assembled helical spring shock absorber assembly is smoothly taken out to complete the entire assembly process.

[0047] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An assembly device for a helical spring shock absorber, characterized in that, It includes a machine bed, a screw drive unit, a spring protection assembly, and a spring fixing seat assembly; the screw drive unit, the spring protection assembly, and the spring fixing seat assembly are all mounted on the machine bed, and the spring protection assembly is located between the screw drive unit and the spring fixing seat assembly, arranged sequentially along the spring axis; The spring mounting assembly includes a long guide rail, which is located on the lower side of the front support near the spring mounting end. A baffle is located above the long guide rail and can slide along the long guide rail. A short guide rail is located on the side of the front support away from the spring mounting end. A stop block is mounted on the short guide rail. The baffle can slide to clamp the spring and fix it to the front support.

2. The assembly device for a helical spring shock absorber as described in claim 1, characterized in that, The equipment bed includes a first base plate, and the first base plate and the second base plate are located at the bottom of the equipment bed. Short reinforcing ribs and long reinforcing ribs are located on the inner side of the side plates for reinforcement. The side plates are located above the first base plate and the second base plate. The side plates have two rows of through holes. The reducer support is located on the inner side of the side plate and its installation height can be adjusted along the through holes. The front support is located above the first base plate and fixed to the side plates. The fixing plate is located between the side plates for connection and reinforcement. The lower support is located above the second base plate. The upper cover is located above the lower support. The lower support and the upper cover together support the screw drive unit.

3. The assembly device for a helical spring shock absorber as described in claim 1, characterized in that, The helical transmission unit includes a gear reducer, which is an integral structure with the motor and is located above the reducer support. The output end of the gear reducer is connected to the spline end of the lead screw. The lead screw support is located in the circular hole of the reducer support. The lead screw nut is located inside the inner support tube and fixed to the inner support tube. The lead screw nut and the inner support tube are fitted onto the lead screw. The outer support tube is fitted outside the inner support tube. One end of the outer support tube is located on the reducer support, and the other end is located between the lower support and the upper cover. The connecting sleeve is located at the exposed end of the inner support tube for connecting to the lower support of the spring. The limit switch bracket is located on the lower support.

4. The assembly device for a helical spring shock absorber as described in claim 1, characterized in that, The screw drive unit also includes a mounting key, a second bearing sleeved on the non-splined end of the screw and limited thereto, a first bearing assembly sleeved on the splined end of the screw, a round nut and a round nut retaining washer set on the splined end of the screw and fastening the first bearing, a mounting key set in the splined groove of the screw to realize the transmission connection, a positioning pin set between the screw nut and the inner support tube to realize the fixed connection, and a guide key set on the side of the outer support tube.

5. The assembly device for a helical spring shock absorber as described in claim 3, characterized in that, The limit switch is mounted on the limit switch bracket, and the switch collision block is mounted on the side of the inner support tube. When the inner support tube moves to the preset position, the switch collision block triggers the limit switch to realize spring compression stroke control, limit protection and motor start / stop control.

6. The assembly device for a helical spring shock absorber as described in claim 3, characterized in that, The outer support tube and the inner support tube are coaxially mounted. The inner support tube moves linearly back and forth along the outer support tube under the drive of the screw, converting the rotational motion into linear compression motion, thus completing the compression and reset of the spring.

7. The assembly device for a helical spring shock absorber as described in claim 1, characterized in that, The spring protection assembly includes a base plate, which is set at a corresponding position on the side plate according to the length of the spring. The lower arc seat is assembled in the opening groove of the base plate. The clamping plate is pressed and fixed at both ends of the lower arc seat and fixed to the side plate. The upper arc seat is set above the lower arc seat. The two can be opened and closed to form a closed protective cavity after closing.

8. The assembly device for a helical spring shock absorber as described in claim 1, characterized in that, The long guide rail is positioned above the stop block, the stop block is slidably mounted on the short guide rail, and the short guide rail is fixedly mounted on the front support.

9. The assembly device for a helical spring shock absorber as described in claim 8, characterized in that, The baffle clamping spring and shock absorber are fixedly mounted on the front support. The stop block cooperates with the short guide rail to realize the sliding limit and positioning of the baffle.

10. According to claim 1 9. A method of using the assembly device for the helical spring shock absorber according to any one of the claims, characterized in that, Includes the following steps: First, perform pre-assembly by connecting the lower spring support to the thin end pin of the shock absorber and installing them together into the spring body; then, hoist the spring into the spring protection assembly, insert the lower spring support into the connecting sleeve at the end of the inner support tube, install the other end of the spring into the spring fixing seat assembly, lock the baffle and close the upper arc seat and the lower arc seat; Start the motor mounted on the reducer support, drive the lead screw to rotate, move the inner support tube to compress the spring to the preset position, and stop the motor after the limit switch mounted on the lower support is triggered; connect the upper support of the shock absorber to the thick end of the shock absorber, and tighten the spring with the process screw; the motor reverses to drive the spring to reset, unlock the baffle, open the protective structure, remove the process screw, and take out the assembled shock absorber assembly.

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