Disassembling and assembling tool for plate spring shock absorber of engine

Abstract

The invention provides an engine plate spring shock absorber disassembling and assembling tool which comprises a tool base, multiple stages of counter bores are formed in the center of the tool base, and fan-shaped protrusions corresponding to plate springs are distributed on the circumference of the upper end face of the tool base; the elastic tensioning component is arranged in the multi-stage counter bore, and the upper portion of the elastic tensioning component is connected with an external loading ejector rod; the thrust component is arranged on the elastic tensioning component in a sleeving mode, the thrust component is composed of a plurality of thrust modules of an annular body equally-divided structure, and square teeth corresponding to the limiting blocks are arranged on the outer ring of the thrust component; and the clamping component comprises a plurality of clamping pieces which are arranged on the tool base in the circumferential direction, the multiple clamping pieces are arranged on the tool base in the circumferential direction, and clamping heads arranged on the clamping pieces are placed between the two reserved limiting blocks. The plate spring shock absorber assembling device not only has the plate spring shock absorber assembling capacity, but also can complete lossless disassembling work, the surface damage of components is small or no damage exists, and the product reliability is high.

Description

Technical Field

[0001] The present application belongs to the technical field of disassembly and assembly of engine leaf spring shock absorbers, and in particular, relates to a disassembly and assembly tool for engine leaf spring shock absorbers. Background Art

[0002] The shock absorber is an important component in the engine. Its main function is to absorb the crankshaft vibration by using the damping and elastic system, so that the resonant speed exceeds the working speed range, thereby reducing the impact of the vibration and noise generated during engine operation.

[0003] The widely used shock absorbers at present include rubber shock absorbers, silicone oil shock absorbers and leaf spring shock absorbers. The first two shock absorbers mainly utilize the inherent characteristics of rubber or silicone oil, such as incompressibility, impact stiffness greater than dynamic stiffness, and dynamic stiffness greater than static stiffness, etc., to reduce impact and dynamic deformation and improve engine vibration. The rubber structure or silicone oil capacity is controllable, the technical requirements for assembly are low, the tooling is simple, and the operation is easy. The leaf spring shock absorber structure is composed of dozens of leaf springs, baffles, engine oil and other solid and liquid combinations. By adjusting the damping, it can meet the specific needs of high-speed engines for shock absorbers. High-performance leaf spring shock absorbers are determined by the assembly accuracy of accurate positioning, clearance control, interference guarantee, etc. between their partitions, leaf springs, spline shafts, etc.

[0004] Therefore, strict control of the leaf spring shock absorber assembly process is an important guarantee for its performance. Traditional shock absorber disassembly and assembly tooling is completely unable to meet the assembly needs of leaf spring shock absorbers, is not convenient for the assembly and disassembly of leaf spring shock absorbers, and is prone to cause surface damage to components during disassembly and assembly, resulting in a high shock absorber failure repair rate. It is essential to equip leaf spring shock absorber disassembly and assembly tooling. Summary of the invention

[0005] In view of this, the present application aims to propose an engine leaf spring shock absorber disassembly and assembly tool to solve the problem that the assembly and disassembly of the leaf spring shock absorber is inconvenient and easily causes damage to the surface of the component.

[0006] To achieve the above purpose, the technical solution of this application is implemented as follows: The present application provides an engine leaf spring shock absorber disassembly and assembly tool, wherein the leaf spring shock absorber comprises at least a shock absorber outer ring and a combined component installed in the shock absorber outer ring, wherein the combined component is composed of a plurality of circumferentially arranged limit blocks, leaf springs and intermediate blocks, wherein the limit blocks are arranged at intervals with the leaf springs, and the intermediate block is located in a gap reserved in the leaf spring, and comprises: A tooling base, wherein a multi-stage countersunk hole is provided at the central position of the tooling base, and a fan-shaped protrusion corresponding to the leaf spring is arranged on the circumference of the upper end surface of the tooling base; An elastic tensioning member, the elastic tensioning member is arranged in the multi-stage countersunk hole, and the upper part of the elastic tensioning member is connected to an external loading ejector rod; A thrust member, the thrust member is sleeved on the elastic tension member, the thrust member is composed of a plurality of thrust modules in an annular structure with equal parts, and the outer ring is provided with square teeth corresponding to the limit blocks; A clamping member, the clamping member comprising a plurality of clamping members circumferentially arranged on the tooling base, the plurality of clamping members circumferentially arranged on the tooling base, the clamping heads provided on the clamping members being placed between the two reserved limit blocks; The loading push rod is controlled to apply a pressure load so that the outer diameter of the elastic tensioning component expands to generate a radial force, and the square teeth of the thrust module act on the inner end of the circumferentially distributed limit block, and cooperate with the circumferentially arranged clamping parts to make the combined components regularly arranged circumferentially inside the outer ring of the shock absorber bear the clamping force in the circumferential direction.

[0007] Furthermore, the tooling base is a circular tooling platform and has a step-like structure; A three-stage trapezoidal countersunk hole is provided at the central position of the tooling base, the elastic tensioning member comprises a first conical pressing block, a second conical pressing block and an elastic tensioning sleeve, the second conical pressing block is arranged above the first conical pressing block, the first conical pressing block is arranged in the first-stage trapezoidal countersunk hole, the first-stage trapezoidal countersunk hole cooperates with the stopper of the first conical pressing block for positioning, and the second and third-stage trapezoidal countersunk holes respectively form a mounting plane of the first conical pressing block and an activity space of the end face of the spline shaft of the shock absorber; The elastic tension sleeve is sleeved on the first conical pressing block and the second conical pressing block.

[0008] Furthermore, the first conical pressing block and the second conical pressing block are arranged relative to the symmetrical inner hole conical surface of the elastic tension sleeve, and a moving space is reserved between the first conical pressing block and the second conical pressing block; The second conical pressing block receives the pressure load applied by the loading ejector rod through positioning through the center hole and end surface contact.

[0009] Furthermore, the elastic tension sleeve is a cylindrical structure as a whole, and its inner hole is a symmetrical tapered hole structure. The sleeve wall of the elastic tension sleeve is circumferentially distributed with axially staggered gaps, and a solid part is left at the bottom of the gap extension.

[0010] Furthermore, each of the thrust modules is provided with a plurality of square teeth, the gaps between the square teeth form a placement space for placing the leaf spring, and the outer ring end faces of the square teeth are in contact with the limit block.

[0011] Furthermore, at least two clamping members are provided, and the two clamping members are symmetrically arranged, and each of the clamping members comprises a fixing bracket, a cone head screw and a wedge-shaped clamping head; The fixing bracket is arranged at the edge of the tooling base, the conical head screw is screwed into the screw hole opened on the fixing bracket, and inserted into the countersunk hole at the end of the wedge-shaped clamping head, and the bottom end of the wedge-shaped clamping head is placed between the two reserved limit blocks.

[0012] Furthermore, the fixing bracket is a Z-shaped structure, and the fixing bracket is arranged on the step of the tool base by fastening bolts. Compared with the prior art, the engine leaf spring shock absorber disassembly and assembly tool described in this application has the following beneficial effects:

[0013] The present application describes an engine leaf spring shock absorber disassembly and assembly tool, which is suitable for operation on a general press workbench. The tool has good versatility and strong adaptability, and can meet the disassembly and assembly of shock absorbers of different sizes with the same number of leaf springs and other composite components. The tool is easy to adjust and requires a small number of replaced components. The entire tool is easy to move, flexible in transfer, and has low labor intensity for workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 A planar cross-sectional view of an engine leaf spring shock absorber disassembly and assembly tool as described in an embodiment of the present application; Figure 2 This is a detailed schematic diagram of the disassembly and assembly tooling of an engine leaf spring shock absorber described in an embodiment of the present application.

[0016] Description of reference numerals: 1-loading push rod; 2-first conical pressure block; 3-elastic tension sleeve; 4-conical head screw; 5-fixed bracket; 6-wedge clamping head; 7-thrust module; 8-second conical pressure block; 9-fastening bolt; 10-tooling base; 11-shock absorber outer ring; 12-limiting block; 13-leaf spring; 14-middle block. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0018] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] The engine leaf spring shock absorber disassembly and assembly tool described in this embodiment is an assembly tool designed for the special combination structure of the engine leaf spring shock absorber, which requires overall circular arrangement of components, interference fixation of the outer ring, elastic clamping and positioning of the inner leaf spring and the spline groove during assembly. The tool is suitable for operation on a general press workbench, has assembly and disassembly functions, and is characterized by stable movement, uniform loading, flexibility and efficiency, and reliable assembled products.

[0020] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0021] The present embodiment provides an engine leaf spring shock absorber disassembly and assembly tool, which requires the use of the vertical loading capacity of an ordinary press to complete the assembly of the leaf spring shock absorber. The present embodiment is described in detail with the structure of each part.

[0022] See also Figure 1 and Figure 2 As shown, this embodiment provides a tool for disassembling and assembling an engine leaf spring shock absorber, wherein the leaf spring shock absorber includes at least an outer ring of the shock absorber and a combined component installed in the outer ring of the shock absorber, and the combined component is composed of a plurality of limit blocks 12, leaf springs 13 and intermediate blocks 14 arranged in a circumferential pattern, the limit blocks 12 and leaf springs 13 are arranged at intervals, and the intermediate block 14 is located in a gap reserved in the leaf spring 13, and the tool is composed of a tool base 10, an elastic tensioning member, a thrust member and a clamping member (it should be noted that the leaf spring shock absorber is an inherent part of the shock absorber and is the assembly object of this application, and the internal structure of the leaf spring shock absorber will not be described in detail here), and a press is used to perform a tight fit and combined interference operation on the leaf spring shock absorber assembly that is neatly stacked in advance according to the design requirements, so as to meet the technical requirements of the predetermined position, interference, shape and position tolerance of each component, and ensure the reliable performance of the shock absorber. Among them:

[0023] The tooling base 10 is a circular tooling platform, which is in the shape of a step as a whole. The upper surface has fan-shaped protrusions with a height of 0.1mm distributed around the circumference. The placement position of the leaf spring 13 and the distance of the leaf spring 13 relative to the end cover are specified during assembly. A three-level trapezoidal countersunk hole is designed in the middle of the working platform. The first-level trapezoidal countersunk hole (i.e., the lowest level countersunk hole) is positioned in coordination with the stop of the first conical pressure block 2 (i.e., the lower conical pressure block) to determine the assembly center position of the leaf spring 13 shock absorber; the second and third-level trapezoidal countersunk holes are respectively the mounting plane of the lower conical pressure block and the activity space of the end face of the spline shaft of the shock absorber.

[0024] The elastic tensioning member includes a first conical pressure block 2, a second conical pressure block 8 and an elastic tensioning sleeve 3. The second conical pressure block 8 and the first conical pressure block 2 are arranged relatively to cooperate with the symmetrical inner hole conical surface of the elastic tensioning sleeve 3. The elastic tensioning sleeve 3 is cylindrical as a whole, and the inner hole is a symmetrical conical hole structure. Axially staggered gaps are distributed around the circumference of the sleeve wall, and a solid part is left at the bottom of the gap extension, so that the entire elastic tensioning sleeve 3 is connected as a whole.

[0025] The second conical pressure block 8 receives the pressure load applied by the loading push rod 1 through the center hole positioning and end face contact. The second conical pressure block 8 and the first conical pressure block 2 simultaneously push the elastic tension sleeve 3 to expand radially under the action of the pressure load, generating a radial force; the outer circle of the elastic tension sleeve 3 fits with the inner circle hole of the combined structure of the thrust member, and the circumference is expanded as a whole under the push of the radial force. The thrust member is an annular body with equal parts. The outer circle is provided with square teeth corresponding to the limit blocks 12. A single fan-shaped thrust module 7 is provided with two square teeth. The gap between the square teeth is the placement space of the leaf spring 13. The elastic tension member and the thrust member cooperate, and the square teeth push the circumferentially distributed multiple limit blocks 12 to enlarge the inner hole of the outer ring 11 of the shock absorber, so as to increase or decrease the number of adjustment plates distributed circumferentially inside the shock absorber, thereby meeting the interference requirement between the assembly and the outer ring 11 of the shock absorber.

[0026] The clamping member comprises two symmetrically arranged clamping members, and the clamping members comprise a fixing bracket 5, a conical head screw 4 and a wedge-shaped clamping head 6; The fixed bracket 5 is arranged at the edge of the tooling base 10 (the fixed bracket 5 is a Z-shaped structure, and the fixed bracket 5 is arranged on the step of the tooling base 10 through the fastening bolts 9), the conical head screw 4 is screwed into the screw hole opened on the fixed bracket 5, and inserted into the countersunk hole at the end of the wedge-shaped clamping head 6, and the bottom end of the wedge-shaped clamping head 6 is placed between the two reserved limit blocks 12.

[0027] Specifically, in this embodiment, the fixed bracket 5 is fixed on the step of the tooling base 10 by fastening bolts 9 and is symmetrically distributed. There are two fixed brackets 5. The conical head screw 4 is screwed into the corresponding screw hole of the fixed bracket 5 and inserted into the countersunk hole at the end of the wedge-shaped clamping head 6. The small end of the wedge-shaped clamping head 6 is placed between two reserved limit blocks 12 and moves downward under the spiral push of the conical head screw 4. The circumferentially distributed combined components inside the shock absorber are gradually clamped under the action of the wedge-shaped clamping head 6.

[0028] It should be noted that the connection method of the main structure of the tooling is mainly based on stopper positioning and end face or inner hole surface matching contact, and some components are connected by threads, such as: loading push rod 1 and press hydraulic rod, fixed bracket 5 and tooling base 10, cone head screw 4 and fixed bracket 5, etc.

[0029] The operation process of the tooling includes assembling and disassembling the shock absorber, as follows: The working process of assembling the shock absorber is to place the shock absorber assembly on the tooling platform of the device and use the first conical pressure block 2 for center positioning; the press machine slowly applies pressure load downward, and the loading push rod 1 transmits the force to the second conical pressure block 8 to make it move downward, and the first and second conical pressure blocks 8 move toward each other so that their outer conical surfaces push the elastic tension sleeve 3 to expand in shape, and the thrust components of the circumferential distribution of several thrust modules 7 expand accordingly; the limit block 12 enlarges the inner hole diameter of the shock absorber outer ring 11 due to the action of the fan-shaped thrust module 7, and the limit block 12 and the leaf spring 1 3. Gaps appear in the multiple combined units formed by the middle block 14, and the positions of the various components are adjusted to meet the requirements. The adjustment of the gaps in the circumferential direction of the various components is completed by the clamping mechanism when the press is gradually loaded. After the adjustment is basically in place, the clamping mechanism is removed, and the remaining two groups of leaf springs 13 and the middle block 14 are placed in the gaps, and thin adjustment sheets are added appropriately. After the basic assembly is completed, the press load is removed, the circumferential diameter of the shock absorber outer ring 11 is measured, and the necessary structural adjustments are made using thin adjustment sheets to finally meet the design target requirements.

[0030] The working process of disassembling the shock absorber is to use a press and a loading push rod 1 to remove the middle spline shaft component of the shock absorber, and place the middle components of the device including the first conical pressure block 2, the second conical pressure block 8, the elastic tension sleeve 3, the fan-shaped thrust module 7, etc.; the press is loaded downward again, and the loading push rod 1 pushes the first and second conical pressure blocks 8 to close toward each other, so that the elastic tension sleeve 3, the fan-shaped thrust module 7, and the limit block 12 are expanded outward in turn to enlarge the inner hole of the shock absorber outer ring 11, and the leaf spring 13 and the middle block 14 are loose at this time; use appropriate tools to extract part of the leaf spring 13 and the middle block 14; remove the load of the press, the interference force between the outer ring of the shock absorber and the surface of the internal assembly disappears, the internal components of the shock absorber are completely loose, and each component is gathered to complete the disassembly of the shock absorber. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

[0031] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. An engine leaf spring shock absorber disassembly and assembly tool, the leaf spring shock absorber at least comprising a shock absorber outer ring, and a combined component installed in the shock absorber outer ring, the combined component consisting of a plurality of circumferentially arranged limit blocks, leaf springs and intermediate blocks, the limit blocks and the leaf springs are arranged at intervals, the intermediate blocks are located in a gap reserved in the leaf spring, and characterized in that: include: A tooling base, wherein a multi-stage countersunk hole is provided at the central position of the tooling base, and a fan-shaped protrusion corresponding to the leaf spring is arranged on the circumference of the upper end surface of the tooling base; An elastic tensioning member, the elastic tensioning member is arranged in the multi-stage countersunk hole, and the upper part of the elastic tensioning member is connected to an external loading ejector rod; A thrust member, the thrust member is sleeved on the elastic tension member, the thrust member is composed of a plurality of thrust modules in an annular structure with equal parts, and the outer ring is provided with square teeth corresponding to the limit blocks; A clamping member, the clamping member comprising a plurality of clamping members circumferentially arranged on the tooling base, the plurality of clamping members circumferentially arranged on the tooling base, the clamping heads provided on the clamping members being placed between the two reserved limit blocks; The loading push rod is controlled to apply a pressure load so that the outer diameter of the elastic tensioning component expands to generate a radial force, and the square teeth of the thrust module act on the inner end of the circumferentially distributed limit block, and cooperate with the circumferentially arranged clamping parts to make the combined components regularly arranged circumferentially inside the outer ring of the shock absorber bear the clamping force in the circumferential direction.

2. The engine leaf spring shock absorber disassembly and assembly tool according to claim 1, characterized in that: The tooling base is a circular tooling platform with a step-like structure; A three-stage trapezoidal countersunk hole is provided at the central position of the tooling base, the elastic tensioning member comprises a first conical pressing block, a second conical pressing block and an elastic tensioning sleeve, the second conical pressing block is arranged above the first conical pressing block, the first conical pressing block is arranged in the first-stage trapezoidal countersunk hole, the first-stage trapezoidal countersunk hole cooperates with the stopper of the first conical pressing block for positioning, and the second and third-stage trapezoidal countersunk holes respectively form a mounting plane of the first conical pressing block and an activity space of the end face of the spline shaft of the shock absorber; The elastic tension sleeve is sleeved on the first conical pressing block and the second conical pressing block.

3. The engine leaf spring shock absorber disassembly and assembly tool according to claim 2, characterized in that: The first conical pressing block and the second conical pressing block are arranged opposite to the symmetrical inner hole conical surface of the elastic tension sleeve, and a moving space is reserved between the first conical pressing block and the second conical pressing block; The second conical pressing block receives the pressure load applied by the loading ejector rod through positioning through the center hole and end surface contact.

4. The engine leaf spring shock absorber disassembly and assembly tool according to claim 2, characterized in that: The elastic tension sleeve is a cylindrical structure as a whole, and its inner hole is a symmetrical tapered hole structure. The sleeve wall of the elastic tension sleeve is circumferentially distributed with axially staggered gaps, and a solid part is left at the bottom of the gap extension.

5. The engine leaf spring shock absorber disassembly and assembly tool according to claim 1, characterized in that: Each of the thrust modules is provided with a plurality of square teeth, the gaps between the square teeth form a placement space for placing the leaf spring, and the outer ring end faces of the square teeth are in contact with the limit block.

6. The engine leaf spring shock absorber disassembly and assembly tool according to claim 1, characterized in that: At least two clamping members are provided, the two clamping members are symmetrically arranged, and each clamping member comprises a fixing bracket, a cone head screw and a wedge-shaped clamping head; The fixing bracket is arranged at the edge of the tooling base, the conical head screw is screwed into the screw hole opened on the fixing bracket, and inserted into the countersunk hole at the end of the wedge-shaped clamping head, and the bottom end of the wedge-shaped clamping head is placed between the two reserved limit blocks.

7. The engine leaf spring shock absorber disassembly and assembly tool according to claim 6, characterized in that: The fixing bracket is a Z-shaped structure, and the fixing bracket is arranged on the step of the tooling base through fastening bolts.

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