Suspension bushing, manufacturing method and control arm assembly

Abstract

The invention discloses a suspension bushing, which belongs to the technical field of vehicle suspension accessories, and adopts the technical scheme that the suspension bushing comprises an outer pipe, an inner pipe, an elastic body and a mounting sleeve, the outer pipe is provided with an inner cavity, the inner pipe is coaxially arranged in the inner cavity, the elastic body is arranged between the outer pipe and the inner pipe, and the mounting sleeve is provided with a flange and a clamping hook I; the clamping hook I is matched with the flange to limit the mounting sleeve in the sleeve, and the mounting sleeve is provided with a deformation notch; the inner wall of the mounting sleeve is enlarged towards the flange to be conical, a second clamping hook is arranged on the inner wall, close to the flange, of the mounting sleeve, and the inner wall of the mounting sleeve is matched with the second clamping hook to limit the outer pipe. After the inner pipe and the outer pipe of the positioning sleeve are completely pressed into the mounting sleeve through cooperation of the first clamping hook and the flange, the second clamping hook is matched with the conical inner wall of the mounting sleeve to axially limit the outer pipe, and the suspension lining is not prone to axially disengaging after being mounted, better in stability and easy to assemble and disassemble. The invention further discloses a manufacturing method of the suspension bushing and a control arm assembly.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle suspension accessories, in particular to a suspension bushing, a manufacturing method and a control arm assembly. BACKGROUND

[0002] Suspension is the general term for all force transmission connecting devices between the automobile subframe (or load-bearing body) and the wheels. Its main functions are: 1. To transmit the forces and moments acting between the wheels and the frame, including vertical reaction forces (supporting forces), longitudinal reaction forces (traction and braking forces), and lateral forces, etc. 2. To cushion the impact force from uneven road surfaces to the frame or body, and to reduce the vibrations caused thereby, so as to ensure smooth and stable driving of the vehicle. 3. To maintain the correct matching of the wheels and the axis under conditions of load changes, vehicle speed and driving turns, and to ensure the stability of the vehicle's handling and the operability of the driving direction. The automobile suspension and the subframe are generally connected by rubber bushings, which are mainly used for damping, ensuring suspension compliance, sound insulation, etc. During the maintenance and repair of the vehicle, the inspection and replacement of the rubber bushing is an important maintenance item.

[0003] For example, the Chinese patent with publication number CN204978133U discloses a high-strength low-torsion bushing structure, which includes an inner sleeve, an outer sleeve and a rubber layer. The inner sleeve and the outer sleeve are cylindrical metal cylinders, the inner sleeve is arranged in the inner cavity of the outer sleeve, and the inner sleeve and the outer sleeve are coaxial. The rubber layer is arranged between the inner sleeve and the outer sleeve, and the inner sleeve and the rubber layer, as well as the rubber layer and the outer sleeve are tightly attached and fixed together. The middle part of the inner sleeve forms a protrusion outward, and the two ends of the inner sleeve are columnar.

[0004] For example, the Chinese patent with publication number CN206968328U discloses a suspension bushing, which includes an inner sleeve, an outer sleeve and a rubber layer. The inner sleeve is a cylinder with a central through hole, and at least a part of the outer side of the inner sleeve is a protruding part extending radially. The outer sleeve is a hollow cylinder, and the protruding part of the inner sleeve is arranged in the hollow part of the outer sleeve. At least a part of the inner sleeve is exposed outside the outer sleeve, and the two end parts of the cylinder of the outer sleeve are bent radially towards the center. The rubber layer is arranged in the hollow part of the outer sleeve between the inner sleeve and the outer sleeve.

[0005] The two kinds of suspension bushings are common rubber bushings in the market, and are applied to most automobile suspension systems due to simple process and low cost, but have the following defects: the suspension bushing needs to bear one or more of radial load, torsional load and deflection load in the use process, the middle part of the inner sleeve is bulged, the thickness of the rubber layer to the bulged part is reduced, although the radial stiffness of the bushing is met, the damping performance of the rubber layer is reduced to a certain extent, the service life is limited, and the structure of the existing bushing still needs to be improved. Secondly, the outer sleeve of the existing bushing is in a cylindrical shape, the bushing is pressed into the sleeve of the control arm through a pressing tool, and the bushing and the sleeve of the control arm are only interference fit, with the increase of the use time and the swing of the control arm, the bushing is axially separated from the sleeve of the control arm, especially the bushing after secondary replacement, the worker does not standardize the disassembly and replacement, the gap between the bushing and the sleeve is increased, the bushing is more likely to separate in the working process, and then the control arm and the auxiliary frame are abnormally worn, in other words, the connection mode between the existing suspension bushing and the sleeve of the control arm is unstable. SUMMARY

[0006] The purpose of the present application is to solve the above-mentioned problems existing in the prior art, and a kind of suspension bushing is proposed, the first technical problem to be solved by the present application is: how to improve the stability of the installed suspension bushing.

[0007] The purpose of the present application is to solve the above-mentioned problems existing in the prior art, and a kind of manufacturing method of suspension bushing is proposed, the second technical problem to be solved by the present application is: how to manufacture the suspension bushing with high installation stability.

[0008] The purpose of the present application is to solve the above-mentioned problems existing in the prior art, and a kind of control arm assembly is proposed, the third technical problem to be solved by the present application is: how to improve the installation stability of the suspension bushing on the control arm body.

[0009] The first technical purpose of the present application can be realized by the following technical scheme: A kind of suspension bushing, including outer tube, inner tube, elastomer, the outer tube has inner cavity, the inner tube is coaxially arranged in the inner cavity, the elastomer is arranged between the outer tube and the inner tube, further including mounting sleeve, one end of the mounting sleeve has flange, the outer wall of the mounting sleeve is provided with hook one, the hook one is matched with the flange and limits the mounting sleeve in sleeve, the mounting sleeve has deformation notch;The inner wall of the mounting sleeve increases to the flange direction and is tapered, and the inner wall of the mounting sleeve close to the flange direction is provided with hook two, the outer wall of the outer tube is also tapered and is matched with the inner wall of the mounting sleeve, the outer tube is inserted into the mounting sleeve and is radially deformed, and the inner wall of the mounting sleeve is matched with the hook two and limits the outer tube.

[0010] By the technical scheme, the elastic body adhesively connects the outer tube and the inner tube into a whole body, before the suspension bushing is installed, the mounting sleeve is inserted into the sleeve of the control arm or the swing arm, so that the flange abuts against one end of the sleeve and the hook abuts against the other end of the sleeve, and the mounting sleeve is positioned in the sleeve by cooperation of the hook and the flange; then the outer tube is pressed into the mounting sleeve from the direction of the flange, the taper surface on the outer wall of the outer tube abuts against the taper surface in the inner cavity, so that the mounting sleeve is radially increased in diameter, and when the outer tube is completely pressed into the mounting sleeve, the hook is limited to the outer tube by cooperation of the hook and the taper inner wall of the mounting sleeve, so that the installation of the suspension bushing is realized, at this time, the outer tube is elastically deformed in diameter by the taper surface in the inner cavity, the elastic body is in a pre-compressed state, and the pre-tightening force of the elastic body applied to the outer tube abuts tightly against the inner wall of the mounting sleeve, so that the stability of the suspension bushing after installation is enhanced and the suspension bushing cannot be easily axially separated from the sleeve.

[0011] In the suspension bushing, at least one deformation hole is formed in the outer tube and close to the flange; a groove is formed in the outer wall of the outer tube close to the flange, the side wall of the groove can abut against the hook, and a clearance is formed between the groove and the inner wall of the mounting sleeve. The outer tube and the elastic body are elastically deformed in diameter through the deformation hole, the outer tube does not need to pass through the diameter-reducing process in the traditional process after production, the elastic body maintains the pre-stress after diameter reduction, the radial rigidity of the elastic body is further increased, and the requirement of low torsional rigidity is realized. In addition, the hook can limit the end of the outer tube by hooking the side wall of the groove, after the service life of the suspension bushing expires, a wrench or the like is inserted into the clearance and extruded and damaged in the central direction of the outer tube, so that the hook is released from the limitation of the groove, and the outer tube can be easily pushed out of the mounting sleeve, the suspension bushing is simple to disassemble and assemble, the assembly mode of the traditional suspension bushing is not changed, no additional installation tool is needed, and the suspension bushing can be directly replaced with the old suspension bushing.

[0012] In the suspension bushing, the inner cavity is provided with a reinforcing ring away from the flange, and the reinforcing ring is wrapped by the elastic body. The reinforcing ring can improve the structural strength of the outer tube and increase the contact area between the elastic body and the inner cavity, and the reinforcing ring can limit the elastic body, so that abnormal sliding of the elastic body relative to the outer tube is avoided.

[0013] In the suspension bushing, the elastic body comprises a buffer piece one and buffer piece twos, the buffer piece twos are provided with at least two and are distributed in the circumferential direction of the inner tube, the outer end of the buffer piece twos is in interference fit with the inner cavity, the side end of the buffer piece twos is limited by the reinforcing ring, and the buffer piece twos and the reinforcing ring are wrapped by the buffer piece one; the outer wall of the inner tube has positioning grooves for positioning the inner end of the buffer piece twos, and the number of the positioning grooves corresponds to the number of the buffer piece twos. The buffer piece twos are inserted into the positioning grooves, and then the buffer piece twos and the inner tube are inserted into the inner cavity as a whole, the reinforcing ring limits the buffer piece twos, and the buffer piece twos maintain the spacing between the outer tube and the inner tube, thereby maintaining the coaxiality between the outer tube and the inner tube, and subsequent processing and production are easier, and the radial stiffness of the suspension bushing can be changed by changing the material of the buffer piece twos.

[0014] In the suspension bushing, the outer wall of the inner tube is provided with ribs equal in number to the positioning grooves, and each positioning groove is provided on each rib. The ribs reduce the spacing between the inner tube and the outer tube, and the ribs and the buffer piece twos maintain the spacing between the inner tube and the outer tube, so that the torsional stiffness and the radial stiffness of the suspension bushing can be changed more easily. At the same time, the ribs further increase the friction between the inner tube and the buffer piece one.

[0015] In the suspension bushing, the buffer piece twos have displacement grooves close to the inner cavity and filled with the buffer piece one. The adhesion area between the buffer piece one and the inner cavity and the inner tube is as large as possible, the displacement grooves reduce the contact area between the buffer piece twos and the inner cavity, and the adhesion of the buffer piece one to the inner cavity and the inner tube can be effectively ensured. Moreover, the buffer piece twos are produced as independent components, and the radial stiffness of the suspension bushing can be changed by replacing the buffer piece twos with different hardness and different materials, so that the suspension bushing is easier to adjust and improve in the later stage, and the mold development cost is low.

[0016] In the suspension bushing, the buffer piece twos are connected by connecting rings. The connecting rings connect the buffer piece twos into a whole component, and the buffer piece one and the buffer piece twos can deform as a whole during the radial displacement or torsion of the inner tube relative to the outer tube, and the buffer piece twos and the connecting rings can assist in improving the radial stiffness of the buffer piece one.

[0017] In the suspension bushing, the buffer piece one is provided with buffer grooves at both ends, the buffer grooves are spaced apart by at least two, the bottom surface of the buffer groove is arc-shaped, the buffer grooves have a protruding rib between them, and the protruding rib protrudes from the end of the outer tube. The arc-shaped bottom surface of the buffer groove improves the elastic deformation performance of the two ends of the buffer piece one, and the buffer piece one will not cause the bottom surface of the buffer groove to crack or break when bearing radial load, torsional load and deflection load, thereby ensuring the service life of the suspension bushing.

[0018] The second technical purpose of the present invention can be achieved through the following technical solutions: A method for manufacturing the suspension bushing as described above, the method comprising the following steps: S1: Turning to form the outer tube, inner tube, and mounting sleeve, and using the mold to preform the buffer part 2; S2: Install the second buffer component into the positioning groove, and then insert the inner tube together with the second buffer component into the inner cavity as a whole, so that the second buffer component is limited by the reinforcement ring, and the outer end of each second buffer component abuts against the inner cavity, and one of the second buffer components is aligned with the deformation hole; S3: Apply adhesive to the inner cavity, the second buffer member, and the outer wall of the inner tube, and store them at a constant temperature; S4: Place the outer tube, buffer component 2, and inner tube as a whole into a molding mold, and use the molding mold to fill the space between the inner tube, outer tube, and buffer component 2 with fluid rubber. After the rubber cools, buffer component 1 is formed, and the buffer groove is formed at both ends of buffer component 1. At this time, buffer component 1 bonds the outer tube, buffer component 2, and inner tube into a whole in a gap-free fitting state.

[0019] The third technical purpose of the present invention can be achieved through the following technical solutions: A control arm assembly includes a control arm body and the aforementioned suspension bushing. The control arm body has a sleeve, and the suspension bushing is installed within the sleeve. The suspension bushing is connected to the sleeve via a mounting sleeve, and the suspension bushing is not easily dislodged from the sleeve in the circumferential direction, thereby improving stability.

[0020] In summary, the present invention has the following beneficial effects compared to the prior art: 1. The mounting sleeve is positioned in the sleeve of the control arm or rocker arm through the cooperation of the first hook and the flange. After the outer tube is fully pressed into the mounting sleeve, the second hook cooperates with the tapered inner wall of the mounting sleeve to limit the axial position of the outer tube. After installation, this suspension bushing is not easy to dislodge axially, has better stability, and is easy to install and remove. 2. Existing suspension bushings have insufficient radial stiffness (also known as being too soft), resulting in insufficient vibration damping, excessive vibration, and reduced driving comfort. This suspension bushing utilizes two different types of cushioning components, a first cushioning component and a second cushioning component, each with different hardness and tensile strength. By varying the material of the second cushioning component, the overall radial stiffness and damping performance of the suspension bushing can be modified. This design meets the requirements of most vehicles for a better driving experience. 3. The outer tube and the inner tube, together with the large-volume buffer, mainly support and buffer performance. The buffer is the second buffer as an auxiliary accessory of the first buffer. The torsion and tensile load between the outer tube and the inner tube is realized by the cooperation of the first buffer and the second buffer. The adhesion area between the first buffer and the second buffer is larger, and the contact area between the first buffer and the inner cavity and the outer wall of the inner tube is larger. The finished product after the first buffer, the outer tube, the inner tube and the second buffer are adhered together is more firm, which ensures the service life of the suspension bushing. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is an exploded structure diagram of the suspension bushing. Figure 2 It is Figure 1 An assembled structure diagram. Figure 3 It is a cross-sectional view of the suspension bushing. Figure 4 It is a cross-sectional view of the outer tube and the mounting sleeve after explosion. Figure 5 It is Figure 2 One of the cross-sectional views. Figure 6 It is another structure diagram of the suspension bushing. Figure 7 It is Figure 2 The second cross-sectional view. Figure 8 It is Figure 2 The third cross-sectional view. Figure 9 It is a partial exploded structure diagram of the inner tube and the second elastic body. Figure 10 It is another structure diagram of the second buffer. Figure 11 It is a structure diagram of the control arm assembly.

[0022] Reference signs: 1, control arm body; 11, sleeve; 12, clamping groove; 13, ball head pin; 100, outer tube; 110, inner cavity; 120, deformation hole; 130, groove; 131, clearance gap; 132, identification strip; 140, reinforcing ring; 200, inner tube; 210, rib; 211, positioning groove; 300, elastic body; 310, first buffer; 311, buffer groove; 312, protruding rib; 320, second buffer; 321, clearance groove; 322, connecting ring; 400, mounting sleeve; 410, flange; 420, first clamping hook; 430, deformation gap; 440, second clamping hook. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0024] A suspension bushing, such as Figures 1-10 As shown, the suspension bushing includes an outer tube 100, an inner tube 200, an elastomer 300 and a mounting sleeve 400. The outer tube 100 has an inner cavity 110, the inner tube 200 is coaxially arranged in the inner cavity 110, the elastomer 300 is arranged between the outer tube 100 and the inner tube 200, and the elastomer 300 adheres the outer tube 100 and the inner tube 200 into a whole. When the inner tube 200 rotates relative to the outer tube 100, the inner tube 200 can drive the elastomer 300 to twist radially within a certain angle range. One end of the mounting sleeve 400 has a flange 410, and the other end of the mounting sleeve 400 is provided with a hook 1 420. The hook 1 420 and the flange 410 can respectively abut against the two ends of the control arm sleeve 11, thereby cooperating to limit the mounting sleeve 400 in the sleeve 11. The mounting sleeve 400 has a deformation notch 430; the inner wall of the mounting sleeve 400 increases in size and becomes conical toward the flange 410, and the inner wall of the mounting sleeve 400 close to the flange 410 is provided with a hook 2 440. The outer wall of the outer tube 100 is also conical and adapted to the inner wall of the mounting sleeve 400. The outer tube 100 is inserted into the mounting sleeve 400 and produces radial elastic deformation. The inner wall of the mounting sleeve 400 and the hook 2 440 cooperate to limit the outer tube 100.

[0025] The outer wall of the mounting sleeve 400 is phosphated and provided with an anti-slip layer, thereby increasing the outer surface roughness of the mounting sleeve 400, thereby preventing the mounting sleeve 400 from rotating abnormally relative to the sleeve 11. The deformation notch 430 is tilted to improve the radial deformation performance of the mounting sleeve 400. Figures 4-6 As shown, in at least one embodiment, the hook 1 420 is located in the middle of the mounting sleeve 400, and accordingly, the inner wall of the sleeve 11 has a slot 12 adapted to the hook 1 420; or, two hooks 2 440 are arranged at intervals, one of which is located at the end of the mounting sleeve 400, and the other is located in the middle of the mounting sleeve 400, and the two hooks 1 420 jointly limit the mounting sleeve 400.

[0026] At least one deformation hole 120 is formed at the end of the outer tube 100 close to the flange 410, and the deformation hole 120 extends in a direction away from the flange 410. As another solution, the outer tube 100 itself is made of elastically deformable plastic.

[0027] like Figures 4-7As shown, the outer wall of the outer tube 100, near the flange 410, is provided with a groove 130 for accommodating the second hook 440. The groove 130 is connected to the deformation hole 120. The sidewall of the groove 130 can abut against the second hook 440. A clearance gap 131 is formed between the groove 130 and the inner wall of the mounting sleeve 400 to allow for insertion of a disassembly tool. The diameter of the inner end of the second hook 440 is A, the minimum diameter of the outer wall of the outer tube 100 is B, and A>B.

[0028] like Figure 3 As shown, an identification strip 132 is provided at the edge of the sidewall of the groove 130. The identification strip 132 is a brightly colored glue applied to the sidewall of the groove 130. After the second hook 440 is inserted into the groove 130, the identification strip 132 is covered by the second hook 440, and the identification strip 132 (glue) adheres the second hook 440 to the sidewall of the groove 130. The installer can determine whether the second hook 440 is properly inserted into the groove 130 by checking whether the second hook 440 covers the identification strip 132. In at least one embodiment, the identification strip 132 is a ring-shaped marking strip with a brightly colored mark.

[0029] A reinforcement ring 140 is integrally formed on the side of the inner cavity 110 away from the flange 410. The reinforcement ring 140 is wrapped by the elastomer 300, thereby increasing the friction between the elastomer 300 and the inner cavity 110. The reinforcement ring 140 can also increase the adhesion area between the elastomer 300 and the inner cavity 110, while preventing the elastomer 300 from slipping abnormally relative to the outer tube 100.

[0030] like Figures 8-10 As shown, the elastomer 300 includes a buffer component 1 310 and a buffer component 2 320. There are at least two buffer components 2 320 and they are distributed circumferentially along the outer wall of the inner tube 200. The outer end of the buffer component 2 320 is interference fit with the inner cavity 110. The side end of the buffer component 2 320 is limited by the reinforcement ring 140, and the buffer component 2 320 and the reinforcement ring 140 are both wrapped by the buffer component 1 310. The volume of the buffer component 1 310 is greater than the sum of the volumes of each buffer component 2 320. The outer wall of the inner tube 200 has a positioning groove 211 for installing and positioning the inner end of the buffer component 2 320, and the number of the positioning grooves 211 corresponds one-to-one to the number of the buffer components 2 320.

[0031] One of the buffer parts 320 is aligned with the deformation hole 120. When producing the buffer part 1 310, the flow of the buffer part 1 310 entering the deformation hole 120 can be reduced; at the same time, the alignment of the buffer part 2 320 with the deformation hole 120 can also ensure the consistency of the production quality of each suspension bushing, and using the deformation hole 120 as a reference benchmark also facilitates subsequent assembly.

[0032] In some embodiments, the outer wall of the inner tube 200 is provided with ribs 210 equal in number to the positioning grooves 211, each positioning groove 211 is correspondingly formed on each rib 210, and each rib 210 is also wrapped by the buffer member one 310; the width of the buffer member two 320 is equal to the width of the rib 210.

[0033] As shown in Figures 8-10 , the buffer member two 320 has a let-in groove 321, which is close to the inner cavity 110 and is filled with the buffer member one 310. The purpose of the let-in groove 321 is to reduce the area occupied by the outer end of the buffer member two 320 in the inner cavity 110, to ensure that the adhesion area between the buffer member one 310 and the inner cavity 110 and the inner tube 200 is maximized, and then to improve the overall firmness of the buffer member one 310 after the inner cavity 110, the inner tube 200, and the buffer member two 320 are adhered.

[0034] The buffer member two 320 is produced as an independent modular component, and different hardness and material of the buffer member two 320 can be replaced, so that the cooperation of the buffer member one 310 and the buffer member two 320 changes the overall radial stiffness and damping performance of the suspension bushing, and the suspension bushing is easier to adjust and improve in the later stage. The buffer member two 320 of different hardness can be manufactured using the same mold, and the mold development cost is low. In some embodiments, the buffer member two 320 is internally provided with a nylon net, so as to further change the damping characteristics of the buffer member two 320 itself and improve its tear resistance.

[0035] In this embodiment, the material of the buffer member one 310 is styrene-butadiene rubber or natural rubber, and the material of the buffer member two 320 can be selected from one or more of synthetic rubber of natural rubber and butadiene rubber, wear-resistant nylon composite material, or polyurethane.

[0036] As shown in Figure 10 , each buffer member two 320 is connected into a whole through a connecting ring 322, the connecting ring 322 is located at the end or middle part of the buffer member two 320, the material of the connecting ring 322 is the same as that of the buffer member two 320, and the connecting ring 322 is also wrapped by the buffer member one 310. The connecting ring 322 and each buffer member two 320 assist to enhance the radial stiffness of the buffer member one 310; as another scheme, the connecting ring 322 is made of metal. In at least one embodiment, metal rings similar to the connecting ring 322 are welded between each rib 210, and the radial stiffness of the buffer member one 310 is assisted by the rings, so as to omit the connecting ring 322 between each buffer member two 320.

[0037] As shown in Figure 3 , Figure 5As shown, the two ends of the buffer piece one 310 are provided with buffer grooves 311, and the buffer grooves 311 are spaced apart by at least two. The bottom surface of the buffer groove 311 is arc-shaped, and the two buffer grooves 311 have a convex rib 312 protruding from the end of the outer tube 100.

[0038] Working principle of a suspension bushing: The buffer piece one 310 adhesively connects the outer tube 100, the inner tube 200, and the buffer piece two 320 into an integral component. When the suspension bushing is installed, the mounting sleeve 400 is first inserted into the sleeve 11 of the control arm or swing arm, so that the flange 410 abuts one end of the sleeve 11 and the hook one 420 abuts the other end of the sleeve 11. Then, the outer tube 100 is pressed into the mounting sleeve 400 from the direction of the flange 410. The tapered surface of the outer wall of the outer tube 100 gradually abuts the tapered surface of the inner cavity 110, so that the mounting sleeve 400 increases in diameter, and the outer wall of the mounting sleeve 400 abuts the inner wall of the sleeve 11. At this time, the mounting sleeve 400 is positioned in the sleeve 11 by the cooperation of the hook one 420 and the flange 410. When the outer tube 100 is completely pressed into the mounting sleeve 400, the hook two 440 is clamped into the groove 130, and the hook two 440 cooperates with the tapered inner wall of the mounting sleeve 400 to limit the outer tube 100, thereby achieving the installation of the suspension bushing. At this time, the outer tube 100 is elastically deformed in diameter by being compressed by the tapered surface of the inner cavity 110, and the buffer piece one 310 and the buffer piece two 320 are in a pre-compressed state. The pre-tightening force exerted by the buffer piece one 310 and the buffer piece two 320 on the outer tube 100 continuously abuts the inner wall of the mounting sleeve 400, thereby enhancing the stability of the suspension bushing after installation. Even if the outer tube 100 bears an axial external force, the outer tube 100 will not easily fall off axially from the sleeve 11.

[0039] The force generated by the automobile tire during work is transmitted to the buffer piece one 310 through the inner tube 200, and the buffer piece one 310 bears the main radial load, torsional load, and deflection load, thereby avoiding the transmission of the force to the subframe. Since the radial stiffness and torsional performance of the buffer piece one 310 are predetermined, the buffer piece two 320 and the rib 210 assist in changing the radial stiffness and torsional performance of the buffer piece one 310, so as to change the overall performance of the suspension bushing, and further improve the NVH performance of the suspension system.

[0040] Since the buffer piece two 320 is produced and assembled as an independent component, different hardness and different materials of the buffer piece two 320 can be used to change the radial stiffness of the suspension bushing accordingly during production. The same production line can be used to produce suspension bushings with different radial stiffness, and the remaining components and production processes do not need to be changed.

[0041] A manufacturing method based on the above suspension bushing, comprising the following steps: S1: turning the outer tube 100, the inner tube 200 and the mounting sleeve 400, the outer wall of the mounting sleeve 400 is phosphated and coated with an anti-skid layer, and the buffer piece two 320 is pre-formed using a mold; S2: the buffer piece two 320 is loaded into the positioning groove 211, and then the inner tube 200 is inserted into the inner cavity 110 together with the buffer piece two 320, so that the buffer piece two 320 is limited by the reinforcing ring 140, and the outer end of each buffer piece two 320 abuts against the inner cavity 110, and one of the buffer piece two 320 is aligned with the deformation hole 120, at this time, the buffer piece two 320 maintains the coaxial state of the inner tube 200 and the outer tube 100, and the reinforcing ring 140 simultaneously maintains the position height of the buffer piece two 320 and the inner tube 200 in the inner cavity 110; S3: the inner cavity 110, the buffer piece two 320 and the outer wall of the inner tube 200 are coated with an adhesive and stored at a constant temperature; S4: the outer tube 100, the buffer piece two 320 and the inner tube 200 are integrally placed in a forming mold, and the space between the inner tube 200, the outer tube 100 and the buffer piece two 320 is filled with fluid rubber by the forming mold, and the buffer piece one 310 is formed after the rubber is cooled, and the buffer grooves 311 are formed at both ends of the buffer piece one 310, at this time, the buffer piece one 310 bonds the outer tube 100, the buffer piece two 320 and the inner tube 200 into an integral whole in a gapless fitting state; S5: the excess rubber entering the deformation hole 120 is removed.

[0042] In step S1, the outer tube 100, the inner tube 200 and the mounting sleeve 400 are made of 20 steel or Q235 steel, which has excellent strength and plasticity; the buffer piece two 320 is made of one or more of synthetic rubber of natural rubber and butadiene rubber, wear-resistant nylon composite material or polyurethane, and the buffer piece two 320 is aligned with the deformation hole 120, so that the buffer piece two 320 partially covers the deformation hole 120, thereby reducing the flow of fluid rubber into the deformation hole 120 and reducing the loss of fluid rubber in step S4.

[0043] In step S3, the outer tube 100, the buffer piece two 320 and the inner tube 200 are stored at a temperature of 75-80℃ before entering the next step, so as to speed up the production efficiency in step S4, and the adhesive is hot vulcanized rubber adhesive, such as CH205.

[0044] In step S4, the buffer piece one 310 is butadiene rubber or natural rubber.

[0045] A control arm assembly, as shown in Figure 11 The control arm assembly includes a control arm body 1 and the above-mentioned suspension bushing, the end of the control arm body 1 has a sleeve 11 and a ball pin 13, and the suspension bushing is installed in the sleeve 11.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the application and, thus, various modifications or additions can be made by those skilled in the art to adapt the described embodiments to various situations without departing from the spirit of the application or without exceeding the scope of the appended claims.

Claims

1. A suspension bushing, comprising an outer tube (100), an inner tube (200), and an elastic body (300), wherein the outer tube (100) has an inner cavity (110), the inner tube (200) is coaxially arranged in the inner cavity (110), and the elastic body (300) is arranged between the outer tube (100) and the inner tube (200), characterized in that: The mounting sleeve (400) is also included. One end of the mounting sleeve (400) has a flange (410). The outer wall of the mounting sleeve (400) is provided with a hook (420). The hook (420) cooperates with the flange (410) to limit the mounting sleeve (400) in the sleeve (11). The mounting sleeve (400) has a deformation notch (430); the inner wall of the mounting sleeve (400) is oriented toward the flange (410). The outer tube (100) is tapered in shape and matches the inner wall of the mounting sleeve (400) in the direction of the flange (410). The outer tube (100) is also tapered and matches the inner wall of the mounting sleeve (400). The outer tube (100) is inserted into the mounting sleeve (400) and produces radial deformation. The inner wall of the mounting sleeve (400) cooperates with the second hook (440) to limit the outer tube (100).

2. The suspension bushing according to claim 1, characterized in that: At least one deformation hole (120) is provided on the outer tube (100), and the deformation hole (120) is close to the flange (410); a groove (130) is provided on the outer wall of the outer tube (100) close to the flange (410), and the side wall of the groove (130) can be tightly pressed against the second hook (440), and a clearance gap (131) is formed between the groove (130) and the inner wall of the mounting sleeve (400).

3. The suspension bushing according to claim 1 or 2, characterized in that: A reinforcement ring (140) is provided on a side of the inner cavity (110) away from the flange (410), and the reinforcement ring (140) is wrapped by the elastomer (300).

4. The suspension bushing according to claim 3, characterized in that: The elastomer (300) includes a buffer component 1 (310) and a buffer component 2 (320). At least two buffer components 2 (320) are provided and distributed along the circumference of the inner tube (200). The outer end of the buffer component 2 (320) is interference-fitted with the inner cavity (110). The side end of the buffer component 2 (320) is limited by the reinforcement ring (140), and the buffer component 2 (320) and the reinforcement ring (140) are both wrapped by the buffer component 1 (310). The outer wall of the inner tube (200) has a positioning groove (211) for positioning the inner end of the buffer component 2 (320), and the number of the positioning grooves (211) corresponds one-to-one to the number of the buffer components 2 (320).

5. The suspension bushing according to claim 4, characterized in that: The outer wall of the inner tube (200) is provided with ribs (210) whose number is equal to the number of the positioning grooves (211), and each positioning groove (211) is correspondingly opened on each rib (210).

6. The suspension bushing according to claim 4, characterized in that: The second buffer member (320) is provided with a clearance groove (321), and the clearance groove (321) is close to the inner cavity (110) and is filled with the first buffer member (310).

7. The suspension bushing according to claim 4, characterized in that: Each of the second buffer members (320) is connected via a connecting ring (322).

8. The suspension bushing according to claim 4, characterized in that: Both ends of the buffer member (310) are provided with buffer grooves (311), at least two of the buffer grooves (311) are spaced apart, the bottom surface of the buffer groove (311) is arc-shaped, and a convex rib (312) is provided between the two buffer grooves (311), and the convex rib (312) protrudes from the end of the outer tube (100).

9. A method for manufacturing a suspension bushing according to any one of claims 1 to 8, characterized in that: The manufacturing method comprises the following steps: S1: Turning and forming the outer tube (100), the inner tube (200), and the mounting sleeve (400), and using a mold to preform the second buffer component (320); S2: Install the second buffer member (320) into the positioning groove (211), and then insert the inner tube (200) together with the second buffer member (320) into the inner cavity (110) as a whole, so that the second buffer member (320) is limited by the reinforcement ring (140), and the outer end of each second buffer member (320) abuts against the inner cavity (110), and one of the second buffer members (320) is aligned with the deformation hole (120); S3: applying adhesive to the inner cavity (110), the second buffer member (320), and the outer wall of the inner tube (200), and storing them at a constant temperature; S4: The outer tube (100), the second buffer component (320), and the inner tube (200) are placed in a molding die as a whole, and the molding die is used to fill the space between the inner tube (200), the outer tube (100), and the second buffer component (320). After the rubber cools, the first buffer component (310) is formed, and the buffer groove (311) is formed at both ends of the first buffer component (310). At this time, the first buffer component (310) bonds the outer tube (100), the second buffer component (320), and the inner tube (200) into a whole in a gap-free fit state.

10. A control arm assembly, characterized in that: The control arm assembly comprises a control arm body (1) and a suspension bushing according to any one of claims 1 to 8, wherein the control arm body (1) has a sleeve (11), and the suspension bushing is installed in the sleeve (11).

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