Insertion rod type rear trailing arm bushing

Abstract

The utility model relates to the technical field of bushings, in particular to a plunger type rear trailing arm bushing which comprises a plunger type inner core, an elastic body bonded on the outer side wall of the plunger type inner core, an outer sleeve bonded on the outer side wall of the elastic body, trapezoidal sliding grooves formed in the two ends of the outer sleeve, and baffles rotating along the trapezoidal sliding grooves and arranged on the two end faces of the outer sleeve. A plurality of limiting assemblies used for preventing the baffles from falling off are installed on the baffles, and limiting rods which are used for being unfolded in the trapezoidal sliding grooves and meshed with one another are arranged in the limiting assemblies. By increasing the thickness of the outer sleeve and arranging the baffles at the two ends of the outer sleeve, rainwater or corrosive media can be effectively prevented from being splashed to the position where the elastic body of the lining is located by wheels in the running process of a vehicle, and therefore the service life of the lining is prolonged; and by extruding the cover plate, the multiple limiting rods can be unfolded at the same time through the push rod, the limiting rods are located in the trapezoidal sliding grooves, and the baffles are prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of bushings, in particular to a plug-in type rear trailing arm bushing. Background Art

[0002] The suspension system is a vital automotive component used to support and control the vehicle's posture, absorb shock, and maintain stability during driving. Dogbone rear trailing arm bushings, as part of the suspension system, connect the vehicle body to the rear trailing arm of the rear wheel suspension.

[0003] Rear trailing arm bushings are often equipped with elastomers. Through their elastic properties, these elastomers can reduce vibration and noise during vehicle operation, providing passengers with a smoother and quieter ride. To achieve this vibration-damping effect on the vehicle body, the elastomers in existing rear trailing arm bushings are often made of rubber, which is often exposed to the elements for extended periods. Prolonged exposure to the elements, such as sunlight, rain, and temperature fluctuations, can cause the rubber molecular chains to break, gradually reducing its elasticity and causing aging. This aging process accelerates the hardening and embrittlement of the rubber bushing, shortening its service life. In the operating environment of the rear trailing arm bushing, frequent contact with rainwater during the rainy season and corrosive media can accelerate the hardening and embrittlement of the rubber bushing, impacting the performance and safety of the vehicle's suspension system.

[0004] Therefore, it is necessary to invent a plug-in type rear trailing arm bushing to solve the above problems. Utility Model Content

[0005] To address the shortcomings of the existing technology, the present invention aims to provide a plug-in rear trailing arm bushing that solves the problem of aging caused by prolonged exposure of rubber materials to the elements, including sunlight, rain, and temperature fluctuations. This can lead to breakage of the rubber molecular chains, a gradual reduction in elasticity, and accelerated hardening and embrittlement of the rubber bushing, impacting the performance and safety of the vehicle suspension system.

[0006] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0007] A plug-in type rear longitudinal arm bushing includes a plug-in type inner core, the outer arm of the plug-in type inner core is bonded with an elastomer, the outer arm of the elastomer is bonded with an outer sleeve, trapezoidal slide grooves are provided at both ends of the outer sleeve, and baffles that rotate along the trapezoidal slide grooves are provided on the two end surfaces of the outer sleeve. A plurality of limit assemblies for preventing the baffles from falling off are installed on the baffles, and the limit assemblies are internally provided with mutually meshing limit rods for expanding inside the trapezoidal slide grooves.

[0008] As a preferred solution of the present invention, annular grooves are provided on the two end faces of the plug-in inner core that are flush with the outer sleeve, and a second snap ring for sliding inside the annular groove and a first snap ring for sliding inside the trapezoidal groove are installed at the bottom end of the baffle.

[0009] As a preferred solution of the present invention, the bottom arm of the trapezoidal chute is provided with a conical protrusion, the maximum cross-section of the snap ring 1 is adapted to the short side of the trapezoidal chute, and the bottom end of the snap ring 1 is fitted with the conical protrusion.

[0010] As a preferred solution of the present invention, mounting holes are provided on both end faces of the limiting assembly, the limiting assembly is mounted on the top end of the baffle through the mounting holes, and the limiting assembly passes through and extends to the bottom end of the first clamping ring.

[0011] As a preferred solution of the present invention, a push rod is slidingly provided inside the limit assembly, and the bottom end of the push rod is connected to a mounting block. The limit rod is located inside the mounting block and forms a rotating connection. Guide rods are provided at both ends of the mounting block. The two side arms of the limit assembly are provided with guide grooves for the longitudinal sliding of the guide rod. Both ends of the limit rod are engaged by a rack, and the limit rod can be in a horizontal state or a vertical state through the rotation of the rack. When the push rod slides inward, the limit rod will separate the two limit rods from each other through the conical protrusion.

[0012] As a preferred solution of the present invention, one end of the push rod extends to the outside of the baffle, and multiple push rods are commonly connected to a cover plate for pushing out and fixing the push rods, and the cover plate is provided with multiple holes for connecting to the baffle.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] In the present invention, by increasing the thickness of the outer jacket and installing baffles at both ends of the outer jacket, it is possible to effectively prevent the wheels from splashing rainwater or corrosive media to the position of the elastomer of the bushing during the driving of the vehicle, thereby extending the service life of the bushing. By arranging the baffle and the limit assembly, the cover plate can be squeezed to allow the push rod to simultaneously expand multiple limit rods, so that the limit rods are inside the trapezoidal slide groove, thereby preventing the baffle from falling off. During driving, the elastomer will be subjected to forces and torques transmitted in all directions. The baffle is fixed by the limit rod, and relatively ample space can be left to compensate for the displacement of the baffle caused by forces in different directions. After the limit rod is expanded, the baffle and the cover plate are locked through the hole on the cover plate, thereby preventing the limit assembly from rebounding. The modular setting of the limit assembly facilitates the processing and manufacturing of the baffle during production and reduces the production difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1The utility model discloses a plug stick type rear trailing arm bush structure schematic diagram.

[0016] Figure 2 The utility model discloses a baffle partial structure schematic diagram.

[0017] Figure 3 The utility model discloses a baffle bottom surface structure schematic diagram.

[0018] Figure 4 The utility model discloses a limiting assembly partial sectional structure schematic diagram.

[0019] Figure 5 The utility model discloses a limiting assembly end surface structure schematic diagram.

[0020] Mark explanation: 1, outer cover, 2, elastomer, 3, plug stick type inner core, 4, annular slide groove, 5, trapezoidal slide groove, 6, conical protrusion, 7, baffle, 8, limiting assembly, 9, cover plate, 10, push rod, 11, limiting rod, 12, mounting block, 13, mounting hole, 14, guide slot, 15, guide rod, 16, brush, 17, snap ring one, 18, snap ring two. Specific implementation

[0021] The utility model will be further described below in conjunction with the drawings. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and can not limit the protection scope of the utility model.

[0022] The utility model provides a kind of plug stick type rear trailing arm bush as shown in Figure 1-5 Including plug stick type inner core 3, the outside arm of plug stick type inner core 3 is bonded with elastomer 2, the outside arm of elastomer 2 is bonded with outer cover 1, the both ends of outer cover 1 are provided with trapezoidal slide groove 5, the both end faces of outer cover 1 are provided with baffle 7 along trapezoidal slide groove 5 rotation, baffle 7 is installed with multiple limiting assembly 8 for preventing baffle 7 from falling off, the inside of limiting assembly 8 is provided with the limiting rod 11 for being unfolded in trapezoidal slide groove 5, trapezoidal slide groove 5 has certain depth, can satisfy the demand that limiting assembly 8 is unfolded in it. Wherein baffle 7 and the material of elastomer 2 are same.

[0023] The both ends of plug stick type inner core 3 and outer cover 1 are provided with annular slide groove 4, the bottom end of baffle 7 is installed with snap ring two 18 for sliding in annular slide groove 4 and snap ring one 17 for sliding in trapezoidal slide groove 5, snap ring two 18 is inserted in the inside of annular slide groove 4, by the setting of snap ring two 18 and snap ring one 17, water mist or corrosive medium can be effectively prevented from contacting elastomer 2, and the protection effect is ensured.

[0024] The bottom arm of the trapezoidal slide 5 is provided with a conical protrusion 6, the maximum cross-section of the snap ring 17 is adapted to the short side of the trapezoidal slide 5, the bottom end of the snap ring 17 is fitted with the conical protrusion 6, the setting of the snap ring 17 facilitates the guidance and installation of the baffle 7, and the conical protrusion 6 is used to reduce the difficulty of deploying multiple limit rods 11 and reduce the difficulty of installing the baffle 7 above the jacket 1.

[0025] Mounting holes 13 are provided on both end faces of the limiting assembly 8, and the limiting assembly 8 is mounted on the top end of the baffle 7 through the mounting holes 13. The limiting assembly 8 passes through and extends to the bottom end of the retaining ring 17. The limiting assembly 8 is installed through the mounting holes 13, which can effectively reduce the processing difficulty of installing multiple limiting assemblies 8 on the baffle 7, reduce production costs, and speed up assembly speed.

[0026] A push rod 10 is slidingly provided inside the limit assembly 8, and the bottom end of the push rod 10 is connected to a mounting block 12. The limit rod 11 is located inside the mounting block 12 and forms a rotating connection. Guide rods 15 are provided at both ends of the mounting block 12. The two side arms of the limit assembly 8 are provided with guide grooves 14 for the longitudinal sliding of the guide rod 15. Both ends of the limit rod 11 are engaged by a rack. The limit rod 11 can be in a horizontal state or a vertical state through the rotation of the rack. When the push rod 10 slides inward, the limit rod 11 will separate the two limit rods 11 from each other through the conical protrusion 6. The setting of the guide rod 15 and the guide groove 14 is used to control the mounting block 12 to slide in the correct direction to avoid deployment failure and cause the baffle 7 to fall off.

[0027] One end of the push rod 10 extends to the outside of the baffle 7, and multiple push rods 10 are commonly connected to a cover plate 9 for pushing out and fixing the push rods 10. The cover plate 9 is provided with multiple holes for connecting the baffle 7. The cover plate 9 is set to push multiple push rods 10 synchronously, thereby controlling the expansion of the limit rod 11, thereby preventing the baffle 7 from falling off.

[0028] The utility model discloses, through the thickness of the increase outer cover 1, install the setting of baffle 7 at the both ends of outer cover 1, can effectively avoid in the process of vehicle driving, the wheel splashes rainwater or corrosive medium to the position where the elastomer 2 of bushing is, thereby prolongs the service life of bushing, through the setting of baffle 7 and limiting component 8, can through extruding cover plate 9, let push rod 10 make multiple limiting rod 11 expand simultaneously, make limiting rod 11 be in trapezoidal slide groove 5 inside, avoid baffle 7 to appear to fall off, in the driving process, elastomer 2 will receive the force and torque of transmission in each direction, through limiting rod 11 to baffle 7 carry out the fixed, can leave relatively abundant space to compensate the displacement of baffle 7 that different directions' force produces, after limiting rod 11 expands, through the hole on cover plate 9 lock baffle 7 with cover plate 9, thereby avoid limiting component 8 to rebound, the modularization setting of limiting component 8, the processing and manufacturing in the production process of baffle 7 reduced production difficulty.

[0029] The above is only the preferred embodiment of the utility model, it should be pointed out, for the ordinary skill in the art, on the premise of not departing from the technical principle of the utility model, can also make several improvements and deformation, these improvements and deformation also should be considered the protection scope of the utility model.

Claims

1. A plunger-type rear trailing arm bushing, characterized in that: The invention comprises an insert rod type inner core (3), an outer arm of the insert rod type inner core (3) is bonded with an elastic body (2), an outer arm of the elastic body (2) is bonded with an outer sleeve (1), trapezoidal slide grooves (5) are provided at both ends of the outer sleeve (1), baffles (7) that rotate along the trapezoidal slide grooves (5) are provided at both end surfaces of the outer sleeve (1), a plurality of limiting components (8) for preventing the baffles (7) from falling off are installed on the baffles (7), and mutually meshing limiting rods (11) for unfolding inside the trapezoidal slide grooves (5) are provided inside the limiting components (8).

2. The plunger-type rear trailing arm bushing according to claim 1, characterized in that: An annular chute (4) is provided on two end surfaces of the plug-in type inner core (3) flush with the outer sleeve (1), and a second snap ring (18) for sliding inside the annular chute (4) and a first snap ring (17) for sliding inside the trapezoidal chute (5) are installed at the bottom end of the baffle (7).

3. The plunger-type rear trailing arm bushing according to claim 2, characterized in that: The bottom arm of the trapezoidal chute (5) is provided with a conical protrusion (6), the maximum cross-section of the snap ring (17) is adapted to the short side of the trapezoidal chute (5), and the bottom end of the snap ring (17) is fitted with the conical protrusion (6).

4. The plunger-type rear trailing arm bushing according to claim 3, characterized in that: Mounting holes (13) are provided on both end faces of the limiting assembly (8), and the limiting assembly (8) is mounted on the top end of the baffle (7) through the mounting holes (13). The limiting assembly (8) passes through and extends to the bottom end of the clamping ring (17).

5. The plunger-type rear trailing arm bushing according to claim 4, characterized in that: A push rod (10) is slidably provided inside the limit assembly (8), and the bottom end of the push rod (10) is connected to a mounting block (12). The limit rod (11) is located inside the mounting block (12) and forms a rotational connection. Guide rods (15) are provided at both ends of the mounting block (12). Guide grooves (14) for longitudinal sliding of the guide rod (15) are provided on both side arms of the limit assembly (8). Both ends of the limit rod (11) are engaged by a rack. The limit rod (11) can be in a horizontal state or a vertical state by rotating the rack. When the push rod (10) slides inward, the limit rod (11) separates the two limit rods (11) from each other through the conical protrusion (6).

6. The plunger-type rear trailing arm bushing according to claim 5, characterized in that: One end of the push rod (10) extends to the outside of the baffle (7), and a plurality of the push rods (10) are commonly connected to a cover plate (9) for pushing out and fixing the push rods (10), and the cover plate (9) is provided with a plurality of holes for connecting to the baffle (7).

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