Auxiliary frame bushing preloading test fixture
By designing a preload test fixture for the subframe bushing, and using a hydraulic press and bolt connections to achieve lateral and radial preload on the subframe bushing, the problem of existing equipment being unable to perform lateral loading was solved, thus improving the accuracy of stiffness testing.
Patent Information
- Application Number
- CN202423284009.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing testing equipment cannot perform lateral preload, resulting in a discrepancy between the measured radial stiffness and the actual axial stiffness under vehicle loading conditions, thus failing to accurately reflect the vehicle loading stiffness of the subframe bushing.
A preload test fixture for subframe bushings was designed. The preload load is applied by a hydraulic press through the combination of the upper body of the fixture, the lower body of the first fixture, and the lower body of the second fixture, and the lateral and radial preload of the subframe bushings is achieved by bolt connection.
Lateral and radial preloading of the subframe bushings during testing was achieved, ensuring that the testing stiffness was consistent with the actual vehicle mounting condition and improving the accuracy of the testing.
Smart Images
Figure CN223742143U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of subframe bushing, and specifically relates to a subframe bushing preloading test fixture. BACKGROUND
[0002] With the development of new energy vehicles, there will be requirements for the cruising range, so with the increase of the cruising range, the weight of the battery rises, and the subframe bears the battery, the subframe bushing connects the vehicle body and the chassis, and the overall battery weight is supported by the axial stiffness of the subframe bushing, so that the performance requirements of the subframe after axial preloading are required.
[0003] The existing test equipment MTS810 and MTS831 can only load vertical load when detecting radial stiffness, cannot increase preloading in the lateral direction, the detected stiffness cannot truly reflect the stiffness in the loaded state, and the detected radial stiffness and the actual loaded postaxial stiffness are inconsistent. UTILITY MODEL CONTENTS
[0004] The utility model discloses a subframe bushing preloading test fixture to solve the shortcomings in the prior art.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:
[0006] The subframe bushing preloading test fixture comprises:
[0007] The fixture upper body, the first fixture lower body, the second fixture lower body and the subframe bushing;
[0008] The first fixture lower body and the second fixture lower body are provided with a test ring between the mutually close side walls, the test ring inner ring side wall is provided with a gasket, the gasket inner side wall is attached to the outer side wall of the subframe bushing, the fixture upper body lower end is provided with a groove opposite to the test ring, and the groove inner wall is fixedly connected with a pressing plate;
[0009] The mounting mechanism is used for mounting between the fixture upper body and the first fixture lower body.
[0010] Preferably, the second fixture lower body side wall is screw-connected with a first bolt, and the first bolt side wall is attached to the test ring side wall.
[0011] Preferably, the first fixture lower body and the second fixture lower body are connected through four second bolts.
[0012] Preferably, the mounting mechanism comprises four threaded barrels fixedly connected to the side wall of the first clamp lower body, two telescopic guide rails fixedly connected to the upper end of the clamp upper body, a horizontal plate fixedly connected to the upper end of the telescopic guide rails, and two third bolts threadedly connected to the side wall of the horizontal plate and penetrating the side wall of the clamp upper body to be threadedly connected to the inner wall of the corresponding threaded barrel.
[0013] The utility model has the following beneficial effects:
[0014] 1. The first clamp lower body and the second clamp lower body are vertically placed in the hydraulic machine, then the hydraulic machine is started, pressure is applied to the second clamp lower body to the required preload, then the four second bolts are manually rotated to connect the first clamp lower body and the second clamp lower body, and finally the preload is removed, so that the first clamp lower body and the second clamp lower body are fixed by the four second bolts, the subframe bushing has lateral preload, the vertical load can only be loaded in the prior art when detecting the radial stiffness, the preload cannot be increased in the lateral direction, the stiffness cannot truly reflect the stiffness of the loaded vehicle state, and the detected radial stiffness and the actual loaded rear axial stiffness are inconsistent.
[0015] 2. The clamp upper body and the four third bolts are arranged, the clamp upper body is placed above the lateral preloaded subframe bushing and is placed in the hydraulic machine, then the hydraulic machine is started, pressure is applied to the clamp upper body to the required preload, then the four third bolts are manually rotated to connect the clamp upper body, the first clamp lower body and the second clamp lower body, and finally the preload is removed, so that the clamp upper body, the first clamp lower body and the second clamp lower body are fixed by the four third bolts, and the subframe bushing has radial preload. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The utility model provides a subframe bushing preload test fixture structural schematic view;
[0017] Figure 2 The Figure 1 vertical sectional structure schematic view;
[0018] Figure 3 The Figure 1 first bolt horizontal sectional structure schematic view.
[0019] In the figure: 1, clamp upper body; 2, first clamp lower body; 3, second clamp lower body; 4, test ring; 5, gasket; 6, subframe bushing; 7, recess; 8, pressing plate; 9, first bolt; 10, second bolt; 11, threaded barrel; 12, telescopic guide rail; 13, horizontal plate; 14, third bolt. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.
[0021] Referring to Figures 1-3 The vice frame bushing preloading test fixture comprises a fixture upper body 1, a first fixture lower body 2, a second fixture lower body 3 and a vice frame bushing 6.
[0022] Test rings 4 are arranged between the mutually close side walls of the first fixture lower body 2 and the second fixture lower body 3. It should be noted that the first fixture lower body 2 and the second fixture lower body 3 form a fixture lower body, facilitating assembly of the test rings 4.
[0023] A grommet 5 is arranged on the inner side wall of the test rings 4, and the inner side wall of the grommet 5 is attached to the outer side wall of the vice frame bushing 6. A recess 7 opposite to the test rings 4 is arranged at the lower end of the fixture upper body 1, and a pressing plate 8 is fixedly connected to the inner wall of the recess 7.
[0024] A first bolt 9 is threadedly connected to the side wall of the second fixture lower body 3, and the side wall of the first bolt 9 is attached to the side wall of the test rings 4, so as to stabilize the position of the test rings 4.
[0025] The first fixture lower body 2 and the second fixture lower body 3 are connected by four second bolts 10.
[0026] After the vice frame bushing 6, the grommet 5 and the test rings 4 are assembled, the vice frame bushing 6, the grommet 5 and the test rings 4 are placed between the first fixture lower body 2 and the second fixture lower body 3, then the first fixture lower body 2 and the second fixture lower body 3 are vertically placed in a hydraulic machine, then the hydraulic machine is started, a pressure is applied to the second fixture lower body 3 to a required preloading load, then the four second bolts 10 are manually rotated to connect the first fixture lower body 2 and the second fixture lower body 3, and finally the preloading force is removed. In this way, the first fixture lower body 2 and the second fixture lower body 3 are fixed by the four second bolts 10, so that the vice frame bushing 6 has a lateral preloading.
[0027] The mounting mechanism is used for mounting between the fixture upper body 1 and the first fixture lower body 2, and comprises four threaded barrels 11 fixedly connected to the side wall of the first fixture lower body 2. The upper end of the fixture upper body 1 is fixedly connected with two telescopic guide rails 12, which can ensure vertical up-and-down movement of a horizontal plate 13. The upper end of the telescopic guide rail 12 is fixedly connected with the horizontal plate 13, the side wall of the horizontal plate 13 is threadedly connected with two third bolts 14, and the side wall of the third bolt 14 penetrates through the side wall of the fixture upper body 1 and is threadedly connected with the inner wall of the corresponding threaded barrel 11.
[0028] The upper clamp body 1 is placed above the laterally preloaded subframe bushing 6, and is placed in a hydraulic machine, then the hydraulic machine is started, pressure is applied to the upper clamp body 1 to the required preloading load, then the four third bolts 14 are manually turned to connect the upper clamp body 1, the first lower clamp body 2 and the second lower clamp body 3, and finally the preloading force is removed, so that the upper clamp body 1, the first lower clamp body 2 and the second lower clamp body 3 are fixed by the four third bolts 14, and the subframe bushing 6 has radial preloading.
[0029] Before the subframe bushing 6 is preloaded, the subframe bushing 6, the spacer ring 5 and the test ring 4 are assembled, then the subframe bushing 6, the spacer ring 5 and the test ring 4 are placed between the first lower clamp body 2 and the second lower clamp body 3, then the first lower clamp body 2 and the second lower clamp body 3 are vertically placed in an external hydraulic machine, then the hydraulic machine is started, pressure is applied to the second lower clamp body 3 to the required preloading load, then the four second bolts 10 are manually turned to connect the first lower clamp body 2 and the second lower clamp body 3, and finally the preloading force is removed, so that the first lower clamp body 2 and the second lower clamp body 3 are fixed by the four second bolts 10, and the subframe bushing 6 has lateral preloading.
[0030] Then the upper clamp body 1 is placed above the laterally preloaded subframe bushing 6, and is placed in a hydraulic machine, then the hydraulic machine is started, pressure is applied to the upper clamp body 1 to the required preloading load, then the four third bolts 14 are manually turned to connect the upper clamp body 1, the first lower clamp body 2 and the second lower clamp body 3, and finally the preloading force is removed, so that the upper clamp body 1, the first lower clamp body 2 and the second lower clamp body 3 are fixed by the four third bolts 14, and the subframe bushing 6 has radial preloading.
[0031] In this way, the prior art can only load vertical load when detecting radial stiffness, and cannot increase preloading in the lateral direction, so that the detected radial stiffness cannot truly reflect the stiffness in the vehicle-mounted state, resulting in inconsistency between the detected radial stiffness and the actual rear axle stiffness under preloading in the vehicle-mounted state.
[0032] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A subframe bushing preload test fixture characterized by, Include: Clamp upper body (1), first clamp lower body (2), second clamp lower body (3) and subframe bushing (6); The first clamp lower body (2) and the second clamp lower body (3) are provided with test ring (4) between the side walls of each other, the inner side wall of the gasket ring (5) is matched with the outer side wall of the subframe bushing (6), the lower end of the clamp upper body (1) is provided with a recess (7) opposite to the test ring (4), and the inner wall of the recess (7) is fixedly connected with the pressing plate (8); The installation mechanism is used for the installation between the clamp upper body (1) and the first clamp lower body (2).
2. The subframe bushing preload test fixture of claim 1, wherein, The side wall of the second clamp lower body (3) is threadedly connected with the first bolt (9), and the side wall of the first bolt (9) is matched with the side wall of the test ring (4).
3. The subframe bushing preload test fixture of claim 1, wherein, The first clamp lower body (2) and the second clamp lower body (3) are connected by four second bolts (10).
4. The subframe bushing preload test fixture of claim 1, wherein, The installation mechanism includes four threaded barrels (11) fixedly connected to the side wall of the first clamp lower body (2), the upper end of the clamp upper body (1) is fixedly connected with two telescopic guide rails (12), the upper end of the telescopic guide rail (12) is fixedly connected with the horizontal plate (13), the side wall of the horizontal plate (13) is threadedly connected with two third bolts (14), and the side wall of the third bolt (14) penetrates the side wall of the clamp upper body (1) and is then threadedly connected with the inner wall of the corresponding threaded barrel (11).