CN115805784A - A rear axle shock absorber and its production process - Google Patents

Abstract

The invention relates to the technical field of machine manufacturing, in particular to a rear axle damping support which comprises a cylinder body, wherein a spring pipe is fixedly installed in the middle of the inside of the cylinder body, a buffer rod is arranged outside the spring pipe, a front damping support assembly is fixedly connected to the right end of the cylinder body, and a rear damping support assembly is fixedly connected to the left end of the cylinder body. This rear axle shock absorber support, it is used for the whole fixed action of back shock attenuation bracket component to have set up bottom plate and backup pad in the fixed unit, certain steadiness has, utilize locating hole down in the positioning unit, lower bolster and constant head tank, butt joint spring pipe and spring pipe reach the installation fixed, and have certain limiting displacement, utilize upper fixed plate and gag lever post and barrel relative calibration welding together, be used for the fixed barrel of barrel through the upper locating hole, spring pipe and buffer lever through upper bolster and locating pin and lower bolster and constant head tank, realize accurate butt joint, improve shock attenuation support's stability.

Description

A rear axle shock absorber and its production process

technical field

The invention relates to the technical field of mechanical manufacturing, in particular to a rear axle damping bracket and a production process thereof.

Background technique

The car drive rear axle shock absorber bracket is welded on the car drive rear axle housing body. Its main function is to fasten and install the car shock absorber and control the installation position of the shock absorber to realize the control of the shock absorber effect when the vehicle is driving. To ensure the stability and comfort of the vehicle during driving, the shock absorber is mainly used to suppress the shock when the spring rebounds after absorbing the shock and the impact from the road. When passing through an uneven road surface, although the shock-absorbing spring can filter the vibration of the road surface, the spring itself will reciprocate, and the shock absorber is used to suppress this spring jumping, and the bracket plays a supporting role. The shock-absorbing bracket protects the built-in components from damage caused by external shock and vibration.

However, the parts processing structure of the existing shock absorbing bracket is complicated, the shape processing parts are many, the processing is difficult, and the deviation is easy to occur in the process of processing the hole, and it is difficult to guarantee the processing accuracy and surface quality.

As disclosed in the national patent CN109719466B, the production equipment and production process of a single-bracket shock absorber include a conveyor belt and the first unit sequentially connected by the conveyor belt, welding workstation I, welding workstation II, air cooling system I, shaping and punching System, welding workstation Ⅲ, welding workstation Ⅳ, air cooling system II, dry leak test device and full inspection tooling, the production equipment of single bracket shock absorber includes the following steps: inspection, letter rolling, end cover, U-shaped card press-fitting , End cover, U-shaped card spot welding, end cover, U-shaped card full welding, spring plate welding, air cooling, shaping, punching, attachment I welding, attachment II welding, product air cooling, product dry leak test, product Full inspection and offline. The invention can not only save manpower, reduce cost, improve production efficiency, improve product quality, but also make qualitative and quantitative judgments in the process of leak testing, and improve the accuracy of air tightness judgment.

However, for the rear axle shock absorber, it is necessary to improve the stability of the shock absorber, and at the same time, its production process reduces the deformation of the parts during processing and the deviation of position accuracy, thereby improving the processing accuracy and surface quality.

For this reason we urgently need to provide a kind of rear axle damping bracket and its production process.

Contents of the invention

The purpose of the present invention is to provide a rear axle shock absorber and its production process, to solve the problem of the rear axle shock absorber proposed in the above background technology needs to improve the stability of the shock absorber, while its production process reduces the number of parts in the process of processing The deformation and deviation of position accuracy, thereby improving the processing accuracy and surface quality.

In order to achieve the above object, the present invention provides the following technical solutions: a rear axle shock absorber, including a cylinder, a spring tube is fixedly installed in the middle of the cylinder, and a buffer rod is arranged outside the spring tube. The right end of the cylinder body is fixedly connected with a front shock absorber bracket assembly, and the left end of the cylinder body is fixedly connected with a rear shock absorber bracket assembly.

The rear shock absorber bracket assembly includes a fixing unit and a positioning unit, the fixing unit includes a lower fixing plate and a support plate, and the positioning unit includes a lower positioning hole, a lower backing plate and a positioning groove.

The lower fixing plate is fixedly connected to the left end of the cylinder, and the supporting plate is welded to the outside of the lower fixing plate.

Preferably, the lower positioning hole is opened inside the supporting plate, the lower backing plate is fixedly installed inside the lower fixing plate, and the positioning groove is welded inside the lower backing plate.

Preferably, the front shock absorber bracket assembly includes an upper fixing plate, an upper positioning hole, an upper backing plate, a positioning pin and a limit rod.

Preferably, the upper fixing plate is fixedly connected to the right end of the cylinder, the upper positioning hole is welded on both sides of the upper fixing plate, the upper backing plate is fixedly installed inside the upper fixing plate, and the positioning pin is welded on Inside the upper backing plate, the limit rod is welded to the left side of the upper fixing plate. The upper fixing plate, the upper positioning hole, the upper backing plate, the positioning pin and the limit rod are set, and the upper fixing plate and the limit rod are calibrated and welded together with the cylinder body, and the cylinder body is fixed through the upper positioning hole. The spring tube and the buffer rod are connected accurately through the upper backing plate and positioning pin, the lower backing plate and the positioning groove, and the stability of the shock absorber is improved.

A production process of a rear axle shock absorber, comprising the following steps;

S1: In the rough machining stage, remove the rough black skin and most of the machining allowance, provide an accurate base surface for subsequent machining, and leave a uniform and appropriate allowance, and locate the principle of the rough reference plane, generally the outer circle is the rough reference, In order to ensure that the processing allowance of its important surface is uniform.

S2: In the semi-finishing stage, improve the accuracy of the positioning reference required for finishing and control the finishing allowance to create conditions for the finishing of the main surface.

S3: In the finishing stage, further improve the surface with high requirements such as precision and surface roughness, so that the parameters of the parts meet the technical requirements, and the selection error is small, and the fine datum that improves the positioning accuracy is caused by the misalignment of the datum The smallest surface is used as a positioning reference.

S4: Use turning to process the shape and internal cavity, drill, mill, and bore to process the holes on the parts, and then heat treatment methods such as low-temperature stress relief annealing and positioning technology to reduce the deformation and position accuracy of the parts during processing. deviation, thereby improving machining accuracy and surface quality.

Preferably, if each of the workpieces is required to be processed to ensure sufficient margin, the surface with the smallest machining margin should be selected as the rough reference.

Preferably, the important working surface and the surface requiring high precision, the secondary surface refers to light holes, screw holes, unmarked tolerance surfaces and other non-working surfaces, after distinguishing the main and secondary surfaces of parts, the main surface Machining sequence to ensure final machining of major surfaces.

Preferably, the shock-absorbing bracket parts should first be processed with fine references for selected follow-up processes, such as outer circles, positioning holes, positioning pins, and positioning grooves. When machining shaft parts, the positioning holes should be drilled first, and the processing disk For sleeve parts, the outer circle and end face should be processed first.

Preferably, when the workpiece is roughed first and then finished, generally rough machining is performed first, and then semi-finishing and finishing are performed. The outer circle of the shock-absorbing bracket parts is rough-turned first, and then finished to ensure the size.

Compared with prior art, the beneficial effect of the present invention is:

1. The shock absorber of the rear axle is equipped with the middle and lower fixing plate and support plate of the fixing unit for the entire fixing function of the rear shock absorbing bracket assembly, which has certain stability. The lower positioning hole, the lower backing plate and the positioning unit Groove, butt spring tube and spring tube to achieve installation and fixation, and has a certain limit effect.

2. The rear axle shock absorber is equipped with an upper fixing plate, an upper positioning hole, an upper backing plate, a positioning pin and a limit rod, and the upper fixing plate and the limit rod are welded together with the cylinder relative to each other, and through the upper positioning The hole is used to fix the cylinder, and the spring tube and the buffer rod are connected through the upper backing plate and positioning pin, the lower backing plate and the positioning groove to achieve precise docking and improve the stability of the shock absorber.

3. The production process of the shock absorbing bracket of the rear axle, in order to ensure the stability and reliability of the processing hole, the end face of the hole should be processed first, and then the hole should be processed, so that the shock absorbing bracket parts should process the end face first and then the hole. Therefore, the profile of the end face is stable, and the positioning and clamping are stable and reliable. The end plane of the hole is processed first, and then the hole is positioned by the end face, which is convenient to ensure the position accuracy of the end face and the hole. Improve the initial working conditions of the tool, reduce the deformation of the part during processing and the deviation of position accuracy, thereby improving the processing accuracy and surface quality.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the overall schematic diagram of rear axle damping bracket and production process thereof of the present invention;

Fig. 2 is rear axle shock-absorbing support of the present invention and its production process sectional view;

Fig. 3 is the schematic diagram of rear axle damping bracket and the local front damping bracket of production process thereof of the present invention;

Fig. 4 is the partial rear shock absorber schematic diagram of rear axle shock absorber support and production process thereof of the present invention;

Fig. 5 is an exploded view of the rear axle damping bracket and its production process of the present invention.

In the figure: 1, barrel; 101, spring tube; 102, buffer rod; 2, front shock absorber bracket assembly; 201, upper fixing plate; 202, upper positioning hole; 203, upper backing plate; 204, positioning pin; 205 3, the rear shock absorber bracket assembly; 301, the lower fixing plate; 302, the support plate; 303, the lower positioning hole; 304, the lower backing plate; 305, the positioning groove.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Please refer to Figures 1-5, the present invention provides a technical solution: a rear axle shock absorber, including a cylinder body 1, a spring tube 101 is fixedly installed in the middle of the cylinder body 1, and acts on the buffer rod 102, the spring tube The outside of 101 is provided with a buffer rod 102, which acts on the spring tube 101, and is used to suppress the rebound to a certain extent, and has a certain buffering effect. A rear shock absorber bracket assembly 3 is connected.

The rear shock absorber bracket assembly 3 includes a fixing unit and a positioning unit. The fixing unit includes a lower fixing plate 301 and a support plate 302 . The positioning unit includes a lower positioning hole 303 , a lower backing plate 304 and a positioning groove 305 .

The lower fixing plate 301 is fixedly connected to the left end of the cylinder body 1 , and the supporting plate 302 is welded to the outside of the lower fixing plate 301 . The lower positioning hole 303 is opened inside the supporting plate 302 , the lower backing plate 304 is fixedly installed inside the lower fixing plate 301 , and the positioning groove 305 is welded inside the lower backing plate 304 . After the lower fixing plate 301 and the support plate 302 in the fixing unit are set, the whole fixing function of the shock absorbing bracket assembly 3 has certain stability, and the lower positioning hole 303, the lower backing plate 304 and the positioning groove 305 in the positioning unit are used for docking. The spring tube 101 and the buffer rod 102 are installed and fixed, and have a certain position-limiting effect.

The front shock absorber bracket assembly 2 includes an upper fixing plate 201 , an upper positioning hole 202 , an upper backing plate 203 , a positioning pin 204 and a limit rod 205 .

The upper fixing plate 201 is fixedly connected to the right end of the cylinder body 1, the upper positioning hole 202 is welded on both sides of the upper fixing plate 201, the upper backing plate 203 is fixedly installed inside the upper fixing plate 201, and the positioning pin 204 is welded to the upper backing plate 203 Inside, the limit rod 205 is welded to the left side of the upper fixing plate 201. The upper fixing plate 201, the upper positioning hole 202, the upper backing plate 203, the positioning pin 204 and the limit rod 205 are set, and the upper fixing plate 201 and the limit rod 205 are calibrated and welded together with the cylinder body 1 through the upper positioning hole. 202 is used to fix the cylinder 1, and the spring tube 101 and the buffer rod 102 are connected accurately through the upper backing plate 203 and positioning pin 204, the lower backing plate 304 and the positioning groove 305, so as to improve the stability of the shock absorber.

A production process of a rear axle shock absorber, comprising the following steps;

S1: In the rough machining stage, remove the rough black skin and most of the machining allowance, provide an accurate base surface for subsequent machining, and leave a uniform and appropriate allowance, and locate the principle of the rough reference plane, generally the outer circle is the rough reference, In order to ensure that the processing allowance of its important surface is uniform.

S2: In the semi-finishing stage, improve the accuracy of the positioning reference required for finishing and control the finishing allowance to create conditions for the finishing of the main surface.

S3: In the finishing stage, further improve the surface with high requirements such as precision and surface roughness, so that the parameters of the parts meet the technical requirements, and the selection error is small, and the fine datum that improves the positioning accuracy is caused by the misalignment of the datum The smallest surface is used as a positioning reference.

S4: Use turning to process the shape and internal cavity, drill, mill, and bore to process the holes on the parts, and then heat treatment methods such as low-temperature stress relief annealing and positioning technology to reduce the deformation and position accuracy of the parts during processing. deviation, thereby improving machining accuracy and surface quality.

In addition, if each workpiece is required to be processed to ensure sufficient allowance, the surface with the smallest machining allowance should be selected as the rough reference.

Important working surfaces and surfaces with high precision requirements. Secondary surfaces refer to smooth holes, screw holes, unmarked tolerance surfaces and other non-working surfaces. After distinguishing the main and secondary surfaces of parts, the processing sequence of the main surfaces is to ensure Final machining of major surfaces.

The shock absorber parts should first process the fine references of the selected subsequent processes, such as the outer circle, positioning holes, positioning pins 204, and positioning grooves 305. When processing shaft parts, the positioning holes should be drilled first, and the disc sleeve parts should be processed. , the outer circle and end face should be processed first.

Rough first and then fine When processing workpieces, generally rough machining is performed first, and then semi-finishing and finishing are performed. The outer circle of the shock-absorbing bracket parts is rough-turned first, and then finished to ensure the size. In order to ensure the stability and reliability of the machining hole, the end surface of the hole should be processed first, and then the hole should be processed, so that the end surface of the shock-absorbing bracket parts should be processed first and then the hole, so that the contour of the end surface is stable, and the positioning and clamping are stable. Reliable, and the end plane of the hole is machined first, and then the hole is positioned by the end face to ensure the position accuracy of the end face and the hole. In addition, the initial working conditions of the tool can be improved when the hole is machined after the plane is machined.

When in use, the process passes through the face first and then the hole. In order to ensure the stability and reliability of the hole, the end face of the hole should be processed first, and then the hole should be processed, so that the end face of the shock absorbing bracket parts should be processed first and then the hole, so that the contour of the end face is stable. , positioning and clamping are stable and reliable, and the end plane of the hole is processed first, and then the hole is positioned and processed by the end face, which is convenient to ensure the position accuracy of the end face and the hole. In addition, when the hole is processed after the plane is processed, the initial work of the tool Conditions are improved, and the device is provided with the lower fixing plate 301 and the support plate 302 in the fixing unit for the whole fixing function of the shock absorbing bracket assembly 3 after use, which has a certain degree of stability. And the positioning groove 305, butt the spring tube 101 and the spring tube 101 to achieve installation and fixation, and have a certain limit function, use the upper fixing plate 201 and the limit rod 205 to be calibrated and welded together with the cylinder 1, through the upper positioning hole 202 The cylinder 1 is used to fix the cylinder 1, and the spring tube 101 and the buffer rod 102 are connected through the upper backing plate 203 and the positioning pin 204 and the lower backing plate 304 and the positioning groove 305 to achieve precise docking and improve the stability of the shock absorber.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (9)

1. The utility model provides a rear axle shock absorber support, includes barrel (1), fixed mounting has spring pipe (101) in the middle of the inside of barrel (1), the outside of spring pipe (101) is provided with buffer beam (102), shock attenuation support subassembly (2), its characterized in that before the right-hand member fixedly connected with of barrel (1): the left end of the cylinder body (1) is fixedly connected with a rear shock absorption support assembly (3);

the rear shock absorption bracket assembly (3) comprises a fixing unit and a positioning unit, the fixing unit comprises a lower fixing plate (301) and a supporting plate (302), and the positioning unit comprises a lower positioning hole (303), a lower backing plate (304) and a positioning groove (305);

the lower fixing plate (301) is fixedly connected to the left end of the barrel (1), and the supporting plate (302) is welded to the outer portion of the lower fixing plate (301).

2. A rear axle shock bracket according to claim 1, wherein: the lower positioning hole (303) is arranged in the supporting plate (302), the lower backing plate (304) is fixedly arranged in the lower fixing plate (301), and the positioning groove (305) is welded in the lower backing plate (304).

3. A rear axle shock bracket according to claim 1, wherein: the front shock absorption support assembly (2) comprises an upper fixing plate (201), an upper positioning hole (202), an upper base plate (203), a positioning pin (204) and a limiting rod (205).

4. A rear axle shock bracket according to claim 3, wherein: upper fixed plate (201) fixed connection is in the right-hand member of barrel (1), it welds in the both sides of upper fixed plate (201) to go up locating hole (202), upper padding plate (203) fixed mounting is in the inside of upper fixed plate (201), locating pin (204) weld in the inside of upper padding plate (203), gag lever post (205) weld in the left side of upper fixed plate (201).

5. A production process of a rear axle damping bracket is characterized in that: comprises the following steps;

s1: in the rough machining stage, black skin and most machining allowance of a blank are removed, a precise base plane is provided for subsequent machining, an even and proper allowance is reserved, and the principle of positioning as a rough reference plane is adopted, generally, an outer circle is taken as a rough reference, and the machining allowance of an important surface is ensured to be even;

s2: in the semi-finishing stage, the accuracy of a positioning reference required by finish machining is improved, and finish machining allowance is controlled, so that conditions are created for finish machining of the main surface;

s3: in the fine machining stage, surfaces with high requirements on precision, surface roughness and the like are further improved, various parameters of the part meet technical requirements, errors are small, a fine reference of positioning precision is improved, and the smallest surface caused by the fact that the references do not coincide serves as the positioning reference.

S4: the shape and the inner cavity are machined by turning, holes on the part are machined by drilling, milling and boring, then the heat treatment mode of low-temperature stress relief annealing and the technological methods such as positioning are adopted, and the deformation and the deviation of position precision of the part in the machining process are reduced.

6. The production process of the rear axle shock absorption bracket according to claim 5, wherein the production process comprises the following steps: if each workpiece has the required machining to ensure that enough allowance exists, the surface with the minimum machining allowance is selected as a rough reference.

7. The production process of the rear axle shock absorption bracket according to claim 5, wherein the production process comprises the following steps: the important working surface and the surface with higher precision requirement, the secondary surface refers to an unthreaded hole, a screw hole, a surface without tolerance marking and other non-working surfaces, and after the main surface and the secondary surface of the part are clearly distinguished, the processing sequence of the main surface is ensured so as to ensure the final processing of the main surface.

8. The production process of the rear axle shock absorption bracket according to claim 5, characterized in that: the damping support part is required to be firstly processed with the selected precise standard of the subsequent process, such as an excircle, a positioning hole, a positioning pin (204) and a positioning groove (305), when the shaft part is processed, the positioning hole is required to be firstly drilled, and when the disc sleeve part is processed, the excircle and the end face are required to be firstly processed.

9. The production process of the rear axle shock absorption bracket according to claim 5, wherein the production process comprises the following steps: when the workpiece is machined through rough machining and then fine machining, rough machining is generally conducted firstly, then semi-fine machining and fine machining are conducted, the outer circle of the damping support part is roughly turned firstly, and then fine turning is conducted to guarantee the size.

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