A spring loading tool for a semi-automatic shock absorber spring loading machine and its spring loading method

Abstract

The present invention discloses a spring loading tooling for a semi-automatic shock absorber spring loading machine and its spring loading method, which includes an upper spring pressing tooling, and also includes a lower spring pressing tooling located below the upper spring pressing tooling. The lower spring pressing tooling is used to limit the spring and compress the spring to the working position; a spring disc positioning tooling is arranged on the upper surface of the lower spring pressing tooling, and the spring disc positioning tooling is used to position the spring disc. The purpose of the present invention is to provide a spring loading tooling for a semi-automatic shock absorber spring loading machine and its spring loading method to solve the problems of low arrival rate of the spring head, limited spring loading compression stroke, and low spring loading efficiency in the prior art, and to achieve the purpose of ensuring that the spring head arrives in place at one time, increasing the spring loading compression stroke, and improving the spring loading efficiency.

Description

Technical Field

[0001] The present invention relates to the field of shock absorbers, and in particular to a spring loading tooling for a semi-automatic spring loading machine for shock absorbers and a spring loading method thereof. Background Art

[0002] A shock absorber is a device used to suppress the oscillation when the spring rebounds after absorbing shock and the impact from the road surface, and is widely used in the mechanical industry such as automobiles. During the production process of shock absorbers, a spring loading machine is required to install springs. The traditional spring loading machine includes a top spring pressing tooling, a bottom spring pressing tooling, and a spring positioning tooling from top to bottom in sequence. The working process during spring assembly is as follows: Place the spring on the spring positioning tooling → The bottom spring pressing tooling positions the second coil at the lower end of the spring → The top spring tooling positions the second coil at the upper end of the spring → The top spring pressing tooling presses down → The spring positioning tooling opens → The shock absorber moves upward from the lower end to the position of the spring positioning tooling → Install other peripheral parts → Apply torque to the strut assembly → Open the top and bottom spring pressing toolings simultaneously → The assembled strut product moves to the discharge position → Discharge and enter the next cycle. The existing spring loading machine has the following defects when in use:

[0003] (1) Since the spring head needs to coincide with the starting point of the spring disc lift, and the spring is pre-positioned with the spring head fixed in advance. Once the starting point of the spring disc of the oil storage cylinder assembly deviates, the spring head will not coincide with the starting point of the spring disc lift, and the arrival rate of the spring head is about 70%, and the assembly of the rest of the shock absorber assembly is not in place;

[0004] (2) Since the bottom spring pressing tooling is in the middle and occupies a certain space during assembly (that is, the non-compressed area of the spring cannot be press-fitted), the press-fitting stroke is limited, resulting in the inability to assemble the products produced on this line later due to insufficient press-fitting stroke;

[0005] (3) Since the bottom spring pressing tooling and the spring positioning tooling need to receive signals to cycle open and close, the production beat will increase; and the shock absorber should be prepared in advance to the working position, rather than moving to the working position after the spring is compressed, which increases the working time; resulting in the production beat not meeting the specified beat requirements and the output not being guaranteed. Summary of the Invention

[0006] The purpose of the present invention is to provide a spring loading tooling for a semi-automatic spring loading machine for shock absorbers and a spring loading method thereof, so as to solve the problems of low arrival rate of the spring head, limited spring loading compression stroke, and low spring loading efficiency in the prior art, and achieve the purpose of ensuring that the spring head is in place at one time, increasing the spring loading compression stroke, and improving the spring loading efficiency.

[0007] The present invention is achieved by the following technical solutions:

[0008] A spring loading tooling of a semi-automatic spring loading machine for a shock absorber includes an upper compression spring tooling and a lower compression spring tooling located below the upper compression spring tooling. The lower compression spring tooling is used to limit the spring and compress the spring to a working position. A spring disk positioning tooling is provided on the upper surface of the lower compression spring tooling, and the spring disk positioning tooling is used to position the spring disk.

[0009] To address the problems of low spring head placement rate, limited spring compression stroke, and low spring installation efficiency in the prior art, the present invention proposes a spring installation tool for a semi-automatic shock absorber spring installation machine. This tool eliminates the spring positioning tool in the prior art and replaces the original lower compression spring tool with a new lower compression spring tool. The lower compression spring tool is positioned directly below the upper compression spring tool. The lower compression spring tool is provided with a through hole for the shock absorber to be installed, facilitating the insertion of the upper portion of the shock absorber from bottom to top. The shock absorber to be installed is then secured by the lower compression spring tool. A spring disc positioning tool is provided on the upper surface of the lower compression spring tool. The spring disc is a supporting component of the shock absorber, and the spring disc positioning tool is used to position the spring disc. When the present application is working, the shock absorber is moved to the positioning position, the lower compression spring fixture is opened, and the shock absorber is moved from the bottom to the working position; the lower compression spring fixture is closed to position the shock absorber; the spring is placed on the spring disk of the shock absorber, and the starting point of the spring coincides with the starting point of the spring disk; the upper compression spring fixture is opened and pressed down to the spring clamping position, and the upper compression spring fixture is closed to clamp the spring; the upper compression spring fixture is pressed down to the working position; an initial torque is applied to the shock absorber assembly; after the torque is completed, the upper compression spring fixture moves to the pressure relief completion position; the upper compression spring fixture is opened and returns to the initial position; at the same time, the lower compression spring fixture is also opened, and the shock absorber is freely released. The present application abandons the spring positioning fixture in the traditional spring loading machine and directly positions the spring disk of the shock absorber, saving the time of opening and closing the spring positioning fixture when working. The present application changes the upper and lower springs from a tooling press-fitting method to a tooling compression spring method in which the lower end of the spring and the upper end of the product are subjected to force, and uses the spring disk that comes with the shock absorber to directly bear the force. The assembly principle has changed significantly, and it has significant progress compared to the existing technology: ① Since the traditional lower compression spring tooling is no longer used, the space in the middle part is released, the pressing stroke is increased, and the product that could not be assembled due to insufficient compression stroke of the equipment can be assembled; ② The use of the spring disk force method greatly increases the force area compared to the traditional bottom cover force. When compressing the same spring, that is, under certain pressure conditions, the contact force per unit area is smaller, the product paint layer is better protected, and the product is less likely to lose paint; ③ Before assembly, the spring head and the spring disk are raised to the starting point to coincide with the assembly, which overcomes the problem of low assembly rate in the existing technology due to the early fixation of the spring head and the offset of the oil storage cylinder assembly and the spring disk starting point, and can ensure that the assembly is in place and the assembly quality is ensured.

[0010] Further, the lower spring pressing tooling includes supporting blocks and positioning plates which are distributed vertically, and both the supporting blocks and the positioning plates are of split structure. That is, the whole lower spring pressing tooling is of split type structure, which is convenient for clamping the shock absorber from the lower part, so that the present application is suitable for shock absorbers of various sizes and models.

[0011] Further, notches are provided on one side of one supporting block facing the other supporting block and on one side of one positioning plate facing the other positioning plate, and the opposite two notches are combined to form the through hole.

[0012] Further, spring clamping blocks are arranged in the notches. The spring clamping blocks are in a V shape with the concave surface facing outwards, and the spring clamping blocks are made of flexible materials. Spring clamping blocks are arranged in the notches of the supporting blocks and the positioning plates. The lower spring pressing tooling clamps the shock absorber through the spring clamping blocks. The lower spring pressing tooling tightly clamps the shock absorber through two pairs of V-shaped spring clamping blocks distributed vertically. Among them, the spring clamping blocks are made of flexible materials to improve the protection of the product paint layer.

[0013] Further, the supporting blocks and the positioning plates are fixedly connected through a plurality of connecting blocks.

[0014] Further, the spring disc positioning tooling includes a plurality of spring mounting pads surrounding in a ring shape. The positioning surfaces of the spring mounting pads match the spring disc to be positioned, and the spring mounting pads are made of flexible materials. The surface of the spring disc is a curved surface. Therefore, the positioning surfaces of the spring mounting pads match the spring disc to be positioned, that is, the positioning surfaces of the spring mounting pads are all in full contact with the spring disc, improving the supporting effect on the spring disc, so that the present application has good stability when installing the spring by the force on the spring disc.

[0015] Further, the upper spring pressing tooling includes two arc-shaped plates that can be spliced. A plurality of limiting blocks are fixed at the bottom of the arc-shaped plates. A plurality of spring pressing blocks are arranged on one side of the limiting blocks facing the inner direction of the corresponding arc-shaped plates. Compared with the prior art, in the present application, the upper spring pressing tooling is changed from an integral type to a split type. The two arc-shaped plates are spliced together. The limiting blocks at the bottom are used to limit the position of the upper end of the shock absorber, and the spring pressing blocks on the inner wall of the limiting blocks apply pressure to the spring to be assembled to realize the spring installation operation.

[0016] Further, a cushion block is also arranged on one side surface of the limiting block facing the inner direction of the corresponding arc-shaped plate. The cushion block is detachably connected to the limiting block, and the cushion block is made of flexible materials. The arrangement of the cushion block is convenient for spring centering adjustment. The cushion block is preferably a strip with the long axis vertical and is made of flexible materials, also for improving the protection of the product paint layer.

[0017] The flexible material described in the present application can be any flexible material in the prior art, preferably nylon material.

[0018] A spring loading method for a spring loading tool of a semi-automatic shock absorber spring loading machine, comprising the following steps:

[0019] (a) Move the shock absorber to the positioning position, open the lower spring pressing tool, and move the shock absorber from bottom to top to the working position; close the lower spring pressing tool to position and shock-absorb the shock absorber;

[0020] (b) Place the spring on the spring disc of the shock absorber, and make the starting point of the spring coincide with the starting point of the spring disc lift;

[0021] (c) Open the upper spring pressing tool, press it down to the spring clamping position, close the upper spring pressing tool to clamp the spring; press the upper and lower spring pressing tools to the working position;

[0022] (d) Apply an initial torque to the shock absorber assembly; after the torque is completed, move the upper spring pressing tool to the pressure relief completion position;

[0023] (e) Open the upper spring pressing tool and return it to the initial position; at the same time, open the lower spring pressing tool, and the shock absorber is freely released.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] 1. The spring loading tool of the semi-automatic shock absorber spring loading machine and its spring loading method of the present invention abandon the spring positioning tool in the traditional spring loading machine, directly position the spring disc of the shock absorber, and save the time for opening and closing the spring positioning tool during operation.

[0026] 2. The spring loading tool of the semi-automatic shock absorber spring loading machine and its spring loading method of the present invention no longer use the traditional lower spring pressing tool, so the space in the middle part is released, the pressing stroke is increased, and the products that could not be assembled due to insufficient compression stroke of the original equipment can now be assembled.

[0027] 3. The spring loading tool of the semi-automatic shock absorber spring loading machine and its spring loading method of the present invention use the force-bearing mode of the spring disc. Compared with the traditional bottom cover force-bearing, the force-bearing area is greatly increased. Under the condition of compressing the same spring, that is, when the pressure is constant, the force per unit area of contact is smaller, the paint layer of the product is better protected, and the product is less likely to lose paint.

[0028] 4. The spring loading tool of the semi-automatic shock absorber spring loading machine and its spring loading method of the present invention assemble the spring head to coincide with the starting point of the spring disc lift before assembly, overcoming the problem of low positioning rate caused by the offset between the oil storage cylinder assembly and the starting point of the spring disc in the prior art, ensuring that the assembly is in place and the assembly quality is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings:

[0030] Figure 1 This is a schematic structural diagram of the lower spring pressing tooling in a specific embodiment of the present invention;

[0031] Figure 2 This is a top view of the lower spring pressing tooling in a specific embodiment of the present invention;

[0032] Figure 3 is a cross-sectional view along the Figure 2 A - A direction line in;

[0033] Figure 4 This is a schematic structural diagram of the support block in a specific embodiment of the present invention;

[0034] Figure 5 This is a schematic structural diagram of the spring loading clip block in a specific embodiment of the present invention;

[0035] Figure 6 This is a schematic structural diagram of the upper spring pressing tooling in a specific embodiment of the present invention;

[0036] Figure 7 This is a side view of the upper spring pressing tooling in a specific embodiment of the present invention;

[0037] Figure 8 This is a schematic structural diagram of the spring pressing block in a specific embodiment of the present invention.

[0038] Markings in the drawings and corresponding component names:

[0039] 101 - arc plate, 102 - limit block, 103 - spring pressing block, 104 - cushion block, 201 - support block, 202 - positioning plate, 203 - spring loading clip block, 204 - connecting block, 3 - spring loading cushion block. Specific embodiments

[0040] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0041] Embodiment 1:

[0042] A spring loading tooling for a semi - automatic shock absorber spring loading machine includes an upper spring pressing tooling and also includes a lower spring pressing tooling located below the upper spring pressing tooling. The lower spring pressing tooling is used to fix the shock absorber to be spring - loaded, and a through - hole for the shock absorber to be spring - loaded to pass through is provided on the upper surface of the lower spring pressing tooling; a spring disk positioning tooling is provided on the upper surface of the lower spring pressing tooling, and the spring disk positioning tooling is used to position the spring disk.

[0043] Preferably, the lower spring pressing tooling includes support blocks 201 and a positioning plate 202 which are distributed up and down, and both the support blocks 201 and the positioning plate 202 are of two-piece structures. The upper spring pressing tooling includes two arc-shaped plates 101 that can be spliced. A plurality of limiting blocks 102 are fixed to the bottom of the arc-shaped plates 101, and a plurality of spring pressing blocks 103 are arranged on one side of the limiting blocks 102 facing the inside of the corresponding arc-shaped plates 101.

[0044] This embodiment solves the quality defects of spring installation in the shock absorber spring installation process, avoids product abnormal noise caused by incomplete spring installation; reduces the spring installation beat, improves productivity; increases the pressing stroke, enhances the compatibility of the spring installation machine, and improves the utilization rate of the entire automatic line; the split tooling is easier to install, and the replacement cost is lower when part of the tooling is worn.

[0045] Embodiment 2:

[0046] As Figure 1 shown in Fig. 8, a spring installation tooling for a semi-automatic shock absorber spring installation machine, on the basis of Embodiment 1, notches are provided on one side of one support block 201 facing the other support block 201 and on one side of one positioning plate 202 facing the other positioning plate 202, and the opposite two notches are spliced into a through hole; the opposite two-piece tooling can be freely opened and closed by the drive of a servo. When opened, it ensures that the product can pass freely, and when closed, it fixes the shock absorber. A spring installation clamping block 203 is arranged in the notch, and the spring installation clamping block 203 is of a V shape with a concave surface facing outwards; the spring installation clamping block 203 is made of a flexible material. The support block 201 and the positioning plate 202 are fixedly connected by a plurality of connecting blocks 204. The spring disc positioning tooling includes a plurality of spring installation pads 3 arranged in a ring, and the positioning surfaces of the spring installation pads 3 match the spring disc to be positioned, and the spring installation pads 3 are made of a flexible material.

[0047] On one side surface of the limiting block 102 facing the inside of the corresponding arc-shaped plate 101, a pad 104 is further arranged, and the pad 104 is detachably connected to the limiting block 102.

[0048] In this embodiment, each spring installation pad 3, spring installation clamping block 203, and pad 104 are all made of nylon material.

[0049] This embodiment solves the adjustment of the concentricity problem between the spring and the shock absorber through the pad 104. According to actual needs, the thickness of the pad 104 can be increased or decreased to ensure the eccentric requirement of spring assembly.

[0050] The spring installation method for installing a spring on a shock absorber through this embodiment includes the following steps:

[0051] (a) Move the shock absorber to the positioning position, open the lower spring pressing tooling, and move the shock absorber from bottom to top to the working position; close the lower spring pressing tooling to position the shock absorber;

[0052] (b) Place the spring on the spring plate of the shock absorber, with the starting point of the spring coinciding with the starting point of the spring plate lift.

[0053] (c) Open the upper spring pressing tooling, lower it to the spring clamping position, and close the upper spring pressing tooling to clamp the spring; lower the upper spring pressing tooling to the working position.

[0054] (d) Apply an initial torque to the shock absorber assembly; after the torque is completed, move the upper spring pressing tooling to the pressure relief completion position.

[0055] (e) Open the upper spring pressing tooling and return it to the initial position; at the same time, open the lower spring pressing tooling, and the shock absorber is freely released.

[0056] Compared with the prior art, the present embodiment has the following advantages:

[0057] ① Less than 30% of the spring heads were not in place after being assembled with the original tooling, and the in-place rate of the spring heads is 100% after the modification.

[0058] ② The cycle time has been increased from the original 60 s to the current 40 s. The time saved for assembling one product by a single spring loading machine is 20 s, improving the production efficiency.

[0059] ③ The shortest spring loading compression stroke has been shortened from the original 200 mm to the current 150 mm, enabling products that could not be assembled due to insufficient compression stroke of the original equipment to be assembled.

[0060] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A spring-loading tool for a semi-automatic shock absorber spring-loading machine, including an upper spring-loading tool, characterized in that, It also includes a lower spring pressing tooling located below the upper spring pressing tooling. The lower spring pressing tooling is used to limit the spring and compress the spring to the working position. A spring disc positioning tooling is arranged on the upper surface of the lower spring pressing tooling, and the spring disc positioning tooling is used to position the spring disc. The lower spring pressing tooling includes support blocks (201) and positioning plates (202) distributed up and down. The support blocks (201) and the positioning plates (202) are both of two-piece structures. A notch is arranged on one side of a support block (201) facing another support block (201) and on one side of a positioning plate (202) facing another positioning plate (202). The opposite two notches are combined into a through hole, and a spring loading clamp block (203) is arranged in the notch. The spring loading clamp block (203) is in a V shape with the concave surface facing outwards. The spring loading clamp block (203) is made of a flexible material. The spring disc positioning tooling includes a number of spring loading pads (3) arranged in a ring. The positioning surfaces of the spring loading pads (3) match the spring disc to be positioned, and the spring loading pads (3) are made of a flexible material.

2. The spring loading tooling of a semi-automatic spring loading machine for a shock absorber according to claim 1, characterized in that, The support block (201) and the positioning plate (202) are fixedly connected by a number of connecting blocks (204).

3. The spring loading tooling of a semi-automatic spring loading machine for a shock absorber according to claim 1, characterized in that, The upper spring pressing tooling includes two splicable arc-shaped plates (101). A number of limiting blocks (102) are fixed at the bottom of the arc-shaped plates (101), and a number of spring pressing blocks (103) are arranged on one side of the limiting blocks (102) facing the inside of the corresponding arc-shaped plates (101).

4. A spring-loading tool for a semi-automatic shock absorber spring-loading machine according to claim 3, characterized in that, A pad (104) is also arranged on the surface of one side of the limiting block (102) facing the inside of the corresponding arc-shaped plate (101). The pad (104) is detachably connected to the limiting block (102), and the pad (104) is made of a flexible material.

5. A spring loading method for a spring loading tool of a semi-automatic shock absorber spring loading machine according to any one of claims 1 to 4, characterized in that, It includes the following steps: (a) Move the shock absorber to the positioning position, open the lower spring pressing tooling, and move the shock absorber from bottom to top to the working position; close the lower spring pressing tooling to position the shock absorber; (b) Place the spring on the spring disc of the shock absorber, and make the starting point of the spring coincide with the starting point of the spring disc lift; (c) Open the upper spring pressing tooling, press down to the spring holding position, and close the upper spring pressing tooling to hold the spring; press down the upper spring pressing tooling to the working position; (d) Apply an initial torque to the shock absorber assembly; After the torque is completed, move the upper spring pressing tooling to the pressure relief completion position; (e) Open the upper spring pressing tooling and return to the initial position; at the same time, open the lower spring pressing tooling, and the shock absorber is freely released.

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