Bushing, press fitting tool, lower control arm assembly and vehicle

Abstract

The utility model provides a lining, a press fitting tool, a lower control arm assembly and a vehicle, and relates to the technical field of vehicle parts. The bushing comprises an inner sleeve, an outer sleeve shell and a rubber layer, the rubber layer is arranged between the inner sleeve and the outer sleeve shell, one end of the rubber layer in the axial direction is provided with a feature structure, and the feature structure is of a protruding structure or a groove structure. The feature structure is used for being arranged opposite to a distance detection structure of the press fitting tool, and only when the lining is positioned on the press fitting tool in the unique direction and angle, the distance detection structure can be arranged opposite to the feature structure, and the correct distance between the distance detection structure and the feature structure is detected. Finally, uniqueness and correctness of press fitting of the bush to the bush support are guaranteed, the distance detection structure can be a distance sensor, and cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, and particularly relates to a bushing, a press-fitting tooling, a lower control arm assembly and a vehicle. Background Art

[0002] In order to improve the riding comfort of customers in the vehicle, the lower control arm of the front suspension is generally connected to the subframe through a bushing assembly. Among them, the bushing needs to be press-fitted into the bushing bracket, the bushing bracket is connected to the subframe, and a pin fixed to one end of the lower control arm is inserted into the bushing for fixation to complete the indirect connection between the lower control arm and the subframe. With the development of technology, and in order to cope with different working conditions during vehicle braking and acceleration, the bushing of the control arm is generally designed with a left-right asymmetric structure for the main direction of energy absorption to better withstand forces during vehicle braking and acceleration. Among them, the left part of the bushing, for example, better withstands forces during vehicle acceleration, and the right part of the bushing better withstands forces during vehicle braking. At this time, the left part of the bushing can also be called the acceleration-side part, and the right part of the bushing can be called the braking-side part.

[0003] In the case of the left-right asymmetry of the bushing, it is required to ensure the uniqueness of the positions where the left and right parts of the bushing are press-fitted onto the bushing bracket. In order to quickly identify the left and right parts of the bushing, the general practice of manufacturers is: such as Figure 1As shown in the figure, a marking arrow 101 is added to the existing bushing 10 to quickly identify the structural positions of the two force application directions (the leftward direction and the rightward direction). The side part in the positive direction of the marking arrow 101 represents the braking side part of the bushing, and the reverse part of the marking arrow 101 represents the accelerating side part of the bushing. During the process of pressing the bushing into the bushing bracket by a pressing tooling, first, the bushing and the bushing bracket need to be positioned by the tooling in a unique direction and angle respectively to ensure the uniqueness of the relative positions of the bushing and the bushing bracket before pressing. Then, they can meet the assembly requirements after being pressed together; in order to ensure the uniqueness of the positioning of the bushing by the tooling, the traditional methods are as follows: 1. Rely on the orientation of the visually marked arrow 101 on its own to ensure the correctness when the bushing is positioned by the tooling; 2. Add a high-definition camera device to identify the orientation of the marking arrow 101 to ensure the correctness when the bushing is positioned by the tooling; 3. Add a clamping groove on the inner sleeve of the bushing and add a protruding feature at the corresponding position on the pressing tooling to ensure the correctness when the bushing is positioned by the tooling. Currently, in Solution 1, relying on manual visual inspection is not reliable, and the error probability in mass production is relatively high; in Solution 2, the equipment cost is expensive, and there is also a certain probability of misidentification by the camera; in Solution 3, the effect of preventing misassembly during pressing is good, but the method of designing a groove on the inner wall of the inner sleeve of the bushing requires adding processing procedures, and the position of adding the groove has an impact on the performance of the bushing, which requires multiple verifications. Once changed subsequently, at least the change of the inner sleeve extrusion die needs to be involved, and the vulcanization die for producing the rubber layer between the outer shell and the inner sleeve also needs to be changed, as well as a series of changes such as the assembly tooling, and the cost is relatively high. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the above technical problems.

[0005] To solve the above problems, the utility model provides a bushing, which comprises an inner sleeve, an outer shell and a rubber layer. The rubber layer is arranged between the inner sleeve and the outer shell, and a feature structure is arranged at one end of the rubber layer in the axial direction. The feature structure is a convex structure or a concave structure.

[0006] A bushing provided by the utility model can be the same as the existing bushing, and also comprises an inner sleeve, an outer shell and a rubber layer located between the two. Furthermore, it can be fixedly inserted with the convex shaft at the end of the control arm through the inner sleeve, and the outer shell is used as a supporting structure for pressing the bushing into the bushing bracket. The rubber layer can adjust the static and dynamic stiffness of the whole bushing to improve the comfort of the occupants.

[0007] Different from the existing bushing, this bushing is also provided with a characteristic structure for preventing incorrect press-fitting. This characteristic structure can be a convex structure or a groove structure, which can be arranged opposite to the distance detection structure of the press-fitting tooling to determine that the bushing is positioned on the press-fitting tooling in a unique direction and angle. Specifically, when the bushing is placed on the press-fitting tooling and positioned, if the bushing is not positioned on the press-fitting tooling in a unique direction and angle, the distance detection structure of the press-fitting tooling will not be arranged opposite to the characteristic structure such as the convex structure, and the correct distance from the distance detection structure to the convex structure cannot be detected; only when the bushing is positioned on the press-fitting tooling in a unique direction and angle, the distance detection structure will be arranged opposite to the convex structure, and the correct distance from the distance detection structure to the convex structure can be detected. Finally, it ensures the uniqueness and correctness of pressing the bushing into the bushing bracket. The distance detection structure can be, for example, a distance sensor, with a relatively low cost. In addition, since there is no need to set a groove structure on the inner sleeve, it will not have an adverse effect on the performance of the bushing itself, and there is no need to redesign the inner sleeve extrusion die; moreover, since the characteristic structure is arranged on the rubber layer, only the convex structure or the groove structure needs to be integrally formed when the rubber layer is vulcanized and molded, and at most, the vulcanization die needs to be correspondingly designed, further reducing the cost. The axis of the rubber layer is consistent with the axis of the entire bushing, which is convenient for being arranged opposite to the distance detection structure. Especially when the convex structure is used as the characteristic structure, it is arranged at one end of the rubber layer in the axial direction, which is more prominent and convenient for the alignment operation with the distance detection structure.

[0008] Further, a concave cavity is arranged around the inner sleeve at one end of the axial direction of the rubber layer, the convex structure is arranged in the concave cavity, and the end face of the convex structure facing the outside of the concave cavity is the end face to be detected, and the end face to be detected is located between the two end faces of the inner sleeve in the axial direction.

[0009] The utility model also provides a press-fitting tooling for pressing the bushing as described above into the bushing mounting hole of the bushing bracket. The press-fitting tooling includes a positioning seat and a distance detection structure; the positioning seat is used for carrying and positioning the bushing; the distance detection structure is relatively fixed with the positioning seat, and the characteristic structure of the bushing is used for being arranged opposite to the distance detection structure.

[0010] As described above, a press-fitting tooling provided in this embodiment, when positioning the bushing, if the bushing is not positioned on the positioning seat of the press-fitting tooling in a unique direction and angle, the distance detection structure whose relative position to the positioning seat in the press-fitting tooling will not be arranged opposite to the feature structure, and thus the correct distance from the distance detection structure to the feature structure cannot be detected; only when the bushing is positioned on the positioning seat of the press-fitting tooling in a unique direction and angle, will the distance detection structure be arranged opposite to the feature structure, and the correct distance from the distance detection structure to the feature structure can be detected. Ultimately, it ensures the uniqueness and correctness of pressing the bushing into the bushing bracket. The distance detection structure can be a distance sensor, with relatively low cost. In addition, since there is no need to set a groove structure in the inner sleeve, it will not have an adverse effect on the performance of the bushing itself, nor is it necessary to redesign the inner sleeve extrusion die; moreover, since the feature structure is arranged at one axial end of the rubber layer, it only needs to be integrally formed when the rubber layer is vulcanized, and at most, the vulcanization die needs to be correspondingly designed, further reducing the cost.

[0011] Further, the positioning seat is provided with a through hole, and the feature structure of the bushing is used to be located at one end of the through hole; the distance detection structure is located at the other end of the through hole and faces the through hole.

[0012] Further, one end of the positioning seat is provided with a positioning groove and / or a positioning shaft for positioning the bushing. The inner diameter of the positioning groove matches the outer diameter of the bushing, and the diameter of the positioning shaft matches the inner diameter of the bushing.

[0013] Further, the press-fitting tooling further includes a guiding seat, which is fixedly arranged opposite to the positioning seat. The guiding seat is configured to be slidably connected with the bushing bracket along the axial direction of the bushing mounting hole.

[0014] Further, the press-fitting tooling further includes an alarm device, which is electrically connected to the distance detection structure.

[0015] Further, the press-fitting tooling further includes a base, a telescopic mechanism, and a press-fitting structure. The positioning seat and the distance detection structure are respectively connected to the base. The connecting end and the movable end of the telescopic mechanism are respectively connected to the base and the press-fitting structure. The telescopic mechanism is used to drive the press-fitting structure to press the bushing bracket and the bushing together.

[0016] The present utility model also provides a lower control arm assembly, including the bushing as described above.

[0017] Since the technical improvement and technical effect of the lower control arm assembly are the same as those of the bushing, therefore, the lower control arm assembly will not be elaborated herein.

[0018] The present utility model further provides a vehicle, which includes the bushing as described above, or includes the lower control arm assembly as described above.

[0019] Since the technical improvements and technical effects of the vehicle are the same as those of the bushing or the lower control arm assembly, the vehicle will not be described in detail herein. Description of the Drawings

[0020] Figure 1 is a schematic structural view of an existing bushing from an axial perspective;

[0021] Figure 2 is a schematic structural view of the bushing of the embodiment of the present utility model from an axial perspective;

[0022] Figure 3 is an axonometric view of the bushing of the embodiment of the present utility model;

[0023] Figure 4 is a schematic structural view of the press-fitting tooling of the embodiment of the present utility model;

[0024] Figure 5 is a sectional structural view of the press-fitting tooling of the embodiment of the present utility model;

[0025] Figure 6 is a schematic structural view of the press-fitting tooling and the bushing in cooperation in the embodiment of the present utility model;

[0026] Figure 7 is a sectional structural view of the press-fitting tooling and the bushing in cooperation in the embodiment of the present utility model;

[0027] Figure 8 is Figure 7 a partial structural view of;

[0028] Figure 9 is a top view of the guide seat and the bushing bracket in cooperation in the embodiment of the present utility model;

[0029] Figure 10 is a schematic structural view of the bushing correctly press-fitted into the bushing bracket in the embodiment of the present utility model.

[0030] Description of the Reference Numerals:

[0031] 1. Bushing; 11. Inner sleeve; 12. Outer housing; 13. Rubber layer; 131. Concave cavity; 2. Protrusion structure; 21. End face to be detected; 3. Bushing bracket; 31. Bracket arm; 32. Mounting sleeve; 321. Bushing mounting hole; 4. Positioning seat; 41. Through hole; 42. Positioning groove; 43. Positioning shaft; 44. Accommodating groove; 5. Guide seat; 51. Guide frame; 52. Connecting frame; 6. Base; 7. Telescopic mechanism; 8. Press-fitting structure; 9. Distance detection structure; 91. Detection bracket; 10. Existing bushing; 101. Arrow mark. Detailed implementation manners

[0032] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0034] Moreover, in the accompanying drawings, the X-axis represents the longitudinal direction, and the positive direction of the X-axis represents the front, and the negative direction of the X-axis represents the rear; the Y-axis represents the transverse direction, and the positive direction of the Y-axis represents the left, and the negative direction of the Y-axis represents the right; the Z-axis represents the vertical direction, that is, the up and down direction, and the positive direction of the Z-axis represents the upper, and the negative direction of the Z-axis represents the lower.

[0035] At the same time, it should be noted that the meanings represented by the foregoing X-axis, Y-axis, and Z-axis are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0036] See Figure 2-3 、 Figure 5 and Figure 7 A bushing according to an embodiment of the present utility model, the bushing includes an inner sleeve 11, an outer shell 12, and a rubber layer 13. The rubber layer 13 is disposed between the inner sleeve 11 and the outer shell 12. One end of the rubber layer 13 in the axial direction is provided with a characteristic structure, and the characteristic structure is a convex structure 2 or a groove structure.

[0037] The bushing provided in this embodiment can be the same as the existing bushing 10, and also includes an inner sleeve 11, an outer shell 12, and a rubber layer 13 located between the two. Furthermore, the inner sleeve 11 can be inserted and fixed to the convex shaft at the end of the control arm, and the outer shell 12 can be used as a support structure for pressing the bushing 1 into the bushing bracket 3. The rubber layer 13 can adjust the dynamic and static stiffness of the entire bushing 1 to improve the comfort of the occupants.

[0038] Different from the existing bushing 10, the bushing 1 is further provided with a feature structure for preventing misassembly. The feature structure can be a convex structure 2 or a groove structure, which is arranged opposite to the distance detection structure 9 of the press-fitting tooling to determine that the bushing 1 is positioned on the press-fitting tooling in a unique direction and angle. Specifically, taking the feature structure as the convex structure 2 as an example, when the bushing 1 is placed on the press-fitting tooling and positioned, if the bushing 1 is not positioned on the press-fitting tooling in a unique direction and angle, the distance detection structure 9 of the press-fitting tooling will not be arranged opposite to the convex structure 2, and the correct distance from the distance detection structure 9 to the convex structure 2 cannot be detected. Only when the bushing 1 is positioned on the press-fitting tooling in a unique direction and angle, the distance detection structure 9 will be arranged opposite to the convex structure 2, and the correct distance from the distance detection structure 9 to the convex structure 2 can be detected. Finally, the uniqueness and correctness of the press-fitting of the bushing 1 to the bushing bracket 3 are ensured. The distance detection structure 9 can be, for example, a distance sensor, with relatively low cost.

[0039] In addition, since there is no need to provide a groove structure on the inner sleeve 11, the performance of the bushing 1 itself will not be adversely affected, and there is no need to redesign the extrusion die for the inner sleeve 11. Moreover, since the feature structure is arranged on the rubber layer 13, only the convex structure 2 or the groove structure needs to be integrally formed during the vulcanization molding of the rubber layer 13, and at most, the vulcanization die needs to be correspondingly designed, further reducing the cost. The axial direction of the rubber layer 13 is consistent with the axial direction of the entire bushing 1, which is convenient for being arranged opposite to the distance detection structure 9. Especially when the convex structure 2 is used as the feature structure, it is arranged at one end in the axial direction of the rubber layer 13, which is more prominent and convenient for the alignment operation with the distance detection structure 9.

[0040] It can be understood that when the feature structure is a groove structure, and when the bushing 1 is correctly positioned on the press-fitting tooling in a unique direction and angle, the distance detection structure 9 is arranged opposite to the groove structure, and the detected distance from the distance detection structure 9 to the bottom wall of the groove structure is the correct distance.

[0041] It can be understood that the press-fitting tooling may include an alarm device. When the bushing 1 is correctly positioned on the press-fitting tooling in a unique direction and angle, the distance detection structure 9 detects that the distance from itself to the protruding structure 2 or the bottom wall of the groove structure is the correct distance. If the actual distance detected by the distance detection structure 9 is the correct distance, it indicates that the bushing is placed on the press-fitting tooling in a unique direction and angle, and at this time the alarm device does not work; wherein, "the bushing 1 is placed on the press-fitting tooling in a unique direction and angle" means that the bushing 1 is placed on the press-fitting tooling with the axial end having the characteristic structure facing the direction of the distance detection structure 9, and the bushing 1 is placed on the press-fitting tooling at the circumferential angle where the characteristic structure faces the distance detection structure 9. When the bushing 1 is placed on the press-fitting tooling and positioned, if the actual distance detected by the distance detection structure 9 is not the correct distance, it indicates that the bushing 1 is not placed on the press-fitting tooling in a unique direction and angle, and the subsequent press-fitting of the bushing 1 with the bushing bracket 3 will not be correct. At this time, the alarm device works to remind the staff to re-place the bushing 1.

[0042] See Figure 2-3 , one end of the rubber layer 13 in the axial direction is provided with a cavity 131 around the inner sleeve 11, the protruding structure 2 is arranged in the cavity 131, and the end face of the protruding structure 2 facing the outside of the cavity 131 is the end face 21 to be detected, and the end face 21 to be detected is located between the two end faces of the inner sleeve 11 in the axial direction.

[0043] During the process of assembling the existing bushing 10 with the control arm, after the existing bushing 10 is sleeved on the convex shaft at one end face of the control arm, the axial end face of the existing bushing 10 (specifically referring to the axial end face of the inner sleeve 11) needs to contact and connect with this end face of the control arm. In order not to damage this assembly relationship, in this embodiment, the protruding structure 2 is arranged in the cavity 131 at this axial end of the rubber layer 13, and the protruding structure 2 does not protrude out of the cavity 131, that is, the end face of the protruding structure 2 facing the outside of the cavity 131, that is, the end face 21 to be detected does not protrude out of the cavity 131 and is not flush with the end face of the inner sleeve 11, but the end face 21 to be detected is located between the two end faces of the inner sleeve 11 in the axial direction; thus, the arrangement of the protruding structure 2 will not interfere with the contact and connection between the end face of the inner sleeve 11 and the corresponding end face of the control arm. Among them, the distance detection structure 9 detects the distance from itself to the protruding structure 2, specifically referring to the distance from itself to the end face 21 to be detected of the protruding structure 2.

[0044] Moreover, in this embodiment, since the protruding structure 2 is not flush with the end face of the inner sleeve 11, thus, the accuracy of the detection by the distance detection structure 9 is ensured, and further the uniqueness of the positioning of the bushing 1 by the press-fitting tooling is ensured. See Figure 8 , assuming that the protruding structure 2 is flush with the end face of the inner sleeve 11, if the bushing 1 is not placed correctly in the circumferential angle, for example, the bushing 1 isFigure 8 After being rotated 180° around the Z-axis as shown and being positioned by the press-fitting tooling, at this time, the distance detection mechanism may regard the detected distance to the end face of the inner sleeve 11 as the distance to the convex structure 2, and the alarm device will not work, which will cause misjudgment by the staff.

[0045] Optionally, for the bushing 1 provided in this embodiment, in addition to the newly designed characteristic structure, the identification arrow designed on the existing bushing 10 can also be retained, which can play a prompting role for manual viewing. It can be understood that when the characteristic structure is a groove structure, the groove structure can be provided on the cavity wall of the cavity 131, that is, the cavity wall at the bottom wall position of the cavity 131 continues to be recessed to form the groove structure, and the bottom wall of the groove structure is the end face to be detected. Of course, when the characteristic structure is a groove structure, the cavity 131 may not be provided, and the groove structure itself will not interfere with the contact between the end face of the inner sleeve 11 and the corresponding end face of the control arm.

[0046] See Figure 4-8 , a press-fitting tooling according to another embodiment of the present utility model, which is used to press the bushing 1 as described above into the bushing mounting hole 321 of the bushing bracket 3. The press-fitting tooling includes a positioning seat 4 and a distance detection structure 9; the positioning seat 4 is used to carry and position the bushing 1, the distance detection structure 9 is fixedly arranged relative to the positioning seat 4, and the characteristic structure of the bushing 1 is used to be arranged opposite to the distance detection structure 9.

[0047] As described above, for the press-fitting tooling provided in this embodiment, when positioning the bushing 1, if the bushing 1 is not positioned on the positioning seat 4 of the press-fitting tooling in a unique direction and angle, the distance detection structure 9 whose relative position with the positioning seat 4 is determined in the press-fitting tooling will not be arranged opposite to the characteristic structure, and the correct distance from the distance detection structure 9 to the characteristic structure cannot be detected; only when the bushing 1 is positioned on the positioning seat 4 of the press-fitting tooling in a unique direction and angle, the distance detection structure 9 will be arranged opposite to the characteristic structure, and the correct distance from the distance detection structure 9 to the characteristic structure can be detected. Finally, it is ensured that the uniqueness and correctness of the bushing 1 pressed into the bushing bracket 3. The distance detection structure 9 can be a distance sensor, with a relatively low cost. In addition, since there is no need to provide a groove structure on the inner sleeve 11, the performance of the bushing 1 itself will not be adversely affected, and there is no need to redesign the inner sleeve 11 extrusion die; and since the characteristic structure is arranged at one axial end of the rubber layer 13, it only needs to integrally form the characteristic structure when vulcanizing the rubber layer 13, and at most, the vulcanization die needs to be correspondingly designed, further reducing the cost.

[0048] Optionally, see Figure 4-8, the positioning seat 4 is provided with a through hole 41, and the characteristic structure of the bushing 1 is adapted to be located at one end of the through hole 41; the distance detection structure 9 is located at the other end of the through hole 41 and is arranged facing the through hole 41.

[0049] In this embodiment, as Figure 8 shown, when the bushing 1 is positioned by being placed on the positioning seat 4 in a unique direction and angle, the characteristic structure of the bushing 1, such as the convex structure 2, is exactly located at one end of the through hole 41 (the top end of the illustrated through hole 41). At the same time, the distance detection structure 9 is located at the other end of the through hole 41 (the bottom end of the illustrated through hole 41) and faces the convex structure 2, thereby realizing the correspondence between the convex structure 2 and the distance detection structure 9. At this time, the distance detection structure 9 can detect the distance to the convex structure 2 through the through hole 41.

[0050] It should be noted that the distance detection structure 9 can be a laser rangefinder, an infrared rangefinder, a ranging radar, or other structures that can measure distance. The through hole 41 serves as a transmission space for signals such as laser, infrared ray, and radar, which can avoid interference of these signals by the external environment and improve the accuracy of distance measurement.

[0051] Among them, since the distance detection structure 9 is specifically arranged on the side of the through hole 41 away from the bushing 1, that is, the detection structure 9 can be specifically arranged on the lower side of the through hole 41, and the bushing bracket 3 before press-fitting can be located on the upper side of the bushing 1 on the positioning seat 4. In this way, the bushing bracket 3 does not hinder the distance detection structure 9 from detecting the distance to the convex structure 2, and when the bushing bracket 3 and the bushing 1 are press-fitted and moved, they will not be interfered by the distance detection structure 9.

[0052] See Figure 5 and Figure 8 , optionally, one end of the positioning seat 4 is provided with a positioning groove 42 or / and a positioning shaft 43 for positioning the bushing 1. The inner diameter of the positioning groove 42 matches the outer diameter of the bushing 1, and the diameter of the positioning shaft 43 matches the inner diameter of the bushing 1.

[0053] In this embodiment, the bushing 1 is positioned by being placed on the positioning seat 4 and moving axially thereon. For example, only a positioning shaft 43 is provided at the top end of the positioning seat 4. After the bushing 1 is axially sleeved onto the positioning shaft 43 until it abuts against the positioning seat 4, the positioning is achieved. Among them, the through hole 41 is located on one side of the positioning shaft 43 so as to be able to correspond to the position of the characteristic structure. Another example is that only a positioning groove 42 is provided at the top end of the positioning seat 4, and the through hole 41 is located at the bottom wall of the positioning groove 42. One end of the bushing 1 having the characteristic structure is axially placed in the positioning groove 42 to achieve positioning. At this time, the inner diameter of the positioning groove 42 can be equal to or slightly larger than the outer diameter of the bushing 1 (that is, the outer diameter of the outer casing 12). Another example is that both the positioning groove 42 and the positioning shaft 43 are provided at the top end of the positioning seat 4, which has a better positioning effect on the bushing 1.

[0054] Optionally, as described above, the press-fitting tooling further includes an alarm device, and the alarm device is electrically connected to the distance detection structure 9. When the bushing 1 is placed on the press-fitting tooling and positioned, if the actual distance detected by the distance detection structure 9 is not the correct distance, it means that the bushing 1 is not placed on the positioning seat 4 of the press-fitting tooling in a unique direction and angle, and the subsequent press-fitting of the bushing 1 with the bushing bracket 3 is not correct. At this time, the alarm device works to remind the staff to re-place the bushing 1. The alarm device can be a warning light, a buzzer, a horn, etc.

[0055] See Figure 4-7 , optionally, the press-fitting tooling further includes a guide seat 5, the guide seat 5 is relatively fixed to the positioning seat 4, and the guide seat 5 is configured to be slidably connected to the bushing bracket 3 along the axial direction of the bushing mounting hole 321.

[0056] In this embodiment, the guide seat 5 is relatively fixed to the positioning seat 4. The positioning seat 4 is used to carry and position the bushing 1. Through the sliding fit connection between the guide seat 5 and the bushing bracket 3 along the axial direction of the bushing mounting hole 321, when the bushing bracket 3 is slidably connected to the guide seat 5, it can ensure that the bushing mounting hole 321 of the bushing bracket 3 is coaxial with the bushing 1, that is, coaxial with the positioning shaft 43, and it can also ensure that the bushing bracket 3 can only move axially along the bushing 1 under the guidance of the guide seat 5. In this way, it is ensured that the bushing 1 and the bushing bracket 3 can be press-fitted together axially ( Figure 10 indicating that the bushing 1 and the bushing bracket 3 have been press-fitted together).

[0057] See Figure 4 and Figure 6, specifically, the guiding seat 5 includes a connecting frame 52 and a guiding frame 51, and the guiding frame 51 is connected to the positioning seat 4 through the connecting frame 52. In this embodiment, the guiding frame 51 is fixed to the positioning seat 4 through the connecting frame 52. After one end of the bushing bracket 3 is fitted with the guiding frame 51, for example, the guiding frame 51 is a U-shaped frame with an upward opening. After one end of the bushing bracket 3 is placed in the U-shaped frame from top to bottom, a sliding connection with the guiding frame 51 is achieved. And at this time, the axis of the bushing mounting hole 321 of the bushing bracket 3 can be coaxial with the lower bushing 1 below. The bushing bracket 3 can move along the axis of the bushing 1 under the guidance of the U-shaped frame to be press-fitted with the bushing 1 together.

[0058] It should be noted that after one end of the bushing bracket 3 is fitted and connected with the guiding frame 51, the bushing bracket 3 can only move along the axis of the bushing 1 under the guiding action of the guiding frame 51, that is, it can only move along the Z-axis and cannot move along the X-axis or Y-axis. After the bushing bracket 3 is press-fitted with the bushing 1 together, the two can be moved upward together until the bushing bracket 3 is separated from the guiding frame 51 to realize the transfer of the assembled bushing bracket 3 and the bushing 1 from the press-fitting tooling.

[0059] See Figure 4 and Figure 9 , optionally, the bushing bracket 3 is an asymmetric structure with respect to the diameter direction of the bushing mounting hole 321.

[0060] In this embodiment, the fitting connection between the bushing bracket 3 and the guiding seat 5 is also unique. Specifically, the bushing bracket 3 is an asymmetric structure with respect to the diameter direction of the bushing mounting hole 321. In this way, if the bushing bracket 3 is installed reversely on the guiding seat 5, even if a sliding fit connection between the two can be achieved, the bushing mounting hole 321 cannot be coaxial with the lower bushing 1 below. For example, the bushing bracket 3 includes a connected bracket arm 31 and a mounting sleeve 32 with a bushing mounting hole 321, and the bracket arm 31 is a symmetric structure. As Figure 9 shown, the symmetric plane of the bracket arm 31 is not coplanar with any diameter direction of the mounting sleeve 32. In this way, if the bushing bracket 3 is turned upside down and slidably fitted with the guiding seat 5, the bushing mounting hole 321 will not be coaxial with the lower bushing, and the subsequent press-fitting of the bushing bracket 3 and the bushing 1 cannot be achieved. Finally, the uniqueness of the sliding fit connection between the bushing bracket 3 and the guiding seat 5 is ensured.

[0061] See Figure 6-7 , optionally, the press-fitting tooling further includes a base 6, a telescopic mechanism 7 and a press-fitting structure 8. The positioning seat 4 and the distance detection structure 9 are respectively connected to the base 6. The connecting end and the moving end of the telescopic mechanism 7 are respectively connected to the base 6 and the press-fitting structure 8. The telescopic mechanism 7 is used to drive the press-fitting structure 8 to press-fit the bushing bracket 3 and the bushing 1 together.

[0062] In this embodiment, after the bushing 1 is correctly placed on the positioning seat 4 and after the bushing bracket 3 is in sliding fit with the guiding seat 5, the telescopic mechanism 7 can contract so as to drive the bushing bracket 3 and the bushing 1 to be press-fitted together through the descending press-fitting structure 8. The force of the telescopic movement of the telescopic mechanism can be hydraulic pressure to ensure that the press-fitting force is sufficient.

[0063] Optionally, referring to Figure 4 and Figure 6 , the positioning seat 4 is provided with a receiving groove 44, one end of the through hole 41 far from the bushing 1 communicates with the receiving groove 44, and the distance detection structure 9 is located in the receiving groove 44.

[0064] In this embodiment, the distance detection structure 9 can be arranged in the receiving groove 44 of the positioning seat 4, and thus can be protected by the positioning seat 4 to prevent the distance detection structure 9 from being interfered by the outside. In this case, one end of the through hole 41 far from the bushing 1 communicates with the receiving groove 44 to ensure that the distance detection structure 9 in the receiving groove 44 faces the through hole 41.

[0065] Specifically, the distance detection structure 9 can be first installed on the detection bracket 91, and then the detection bracket 91 and the distance detection structure 9 are placed in the receiving groove 44. The detection bracket 91 can be fixedly connected to the positioning seat 4 or the base 6. Among them, the receiving groove 44 can penetrate the positioning seat 4 along the radial direction of the bushing 1, that is, penetrate the positioning seat 4 along the Figure 4 X-axis direction in

[0066] A lower control arm assembly according to another embodiment of the present utility model includes the bushing as described above.

[0067] Since the technical improvement and technical effect of the lower control arm assembly are the same as those of the bushing, the lower control arm assembly will not be described in detail herein.

[0068] A vehicle according to still another embodiment of the present utility model includes the bushing as described above, or includes the lower control arm assembly as described above.

[0069] Since the technical improvement and technical effect of the vehicle are the same as those of the bushing or the lower control arm assembly, the vehicle will not be described in detail herein.

[0070] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0071] Although the present utility model is disclosed as above, the protection scope of the present utility model disclosed is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model disclosed, and these changes and modifications will all fall within the protection scope of the present utility model.

Claims

1. A bushing, characterized in that: The invention comprises an inner sleeve (11), an outer sleeve (12) and a rubber layer (13), wherein the rubber layer (13) is arranged between the inner sleeve (11) and the outer sleeve (12), and a characteristic structure is arranged at one axial end of the rubber layer (13), wherein the characteristic structure is a protrusion structure (2) or a groove structure.

2. The bushing according to claim 1, characterized in that A concave cavity (131) is arranged at one axial end of the rubber layer (13) surrounding the inner sleeve (11); the characteristic structure is a convex structure (2); the convex structure (2) is arranged in the concave cavity (131); and an end face of the convex structure (2) facing the outside of the concave cavity (131) is an end face to be detected (21); the end face to be detected (21) is located between the two axial end faces of the inner sleeve (11).

3. A press-fitting tool for pressing the bushing according to claim 1 or 2 into the bushing mounting hole (321) of the bushing bracket (3), characterized in that: It comprises a positioning seat (4) and a distance detection structure (9); the positioning seat (4) is used to carry and position the bushing (1), the distance detection structure (9) is relatively fixed to the positioning seat (4), and the characteristic structure of the bushing (1) is used to be arranged relative to the distance detection structure (9).

4. The press-fitting tool according to claim 3, characterized in that: The positioning seat (4) is provided with a through hole (41), and the characteristic structure of the bushing (1) is used to be located at one end of the through hole (41); the distance detection structure (9) is located at the other end of the through hole (41) and is arranged toward the through hole (41).

5. The press-fitting tool according to claim 3, characterized in that: A positioning groove (42) and / or a positioning shaft (43) for positioning the bushing (1) are provided at one end of the positioning seat (4); the inner diameter of the positioning groove (42) matches the outer diameter of the bushing (1); and the diameter of the positioning shaft (43) matches the inner diameter of the bushing (1).

6. The press-fitting tool according to any one of claims 3 to 5, characterized in that: It also includes a guide seat (5), the guide seat (5) is relatively fixed to the positioning seat (4), and the guide seat (5) is configured to be slidably connected to the bushing bracket (3) along the axial direction of the bushing mounting hole (321).

7. The press-fitting tool according to claim 3, characterized in that: It also includes an alarm device, which is electrically connected to the distance detection structure (9).

8. The press-fitting tool according to claim 3, characterized in that: It also includes a base (6), a telescopic mechanism (7) and a press-fitting structure (8); the positioning seat (4) and the distance detection structure (9) are respectively connected to the base (6); the connecting end and the movable end of the telescopic mechanism (7) are respectively connected to the base (6) and the press-fitting structure (8); the telescopic mechanism (7) is used to drive the press-fitting structure (8) to press-fit the bushing bracket (3) and the bushing (1) together.

9. A lower control arm assembly, characterized in that: Comprising a bushing as claimed in claim 1 or 2.

10. A vehicle, characterized in that: Includes the bushing as claimed in claim 1 or 2, or includes the lower control arm assembly as claimed in claim 9.

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