A fixture for the torsional stiffness test of a body-in-white

Abstract

The present invention discloses a fixture for white body torsional stiffness test, which includes a positioning block assembly. A positioning block base is arranged at the bottom of the positioning block assembly, and mounting screw holes are provided at the bottom of the positioning block base for pre-installing it on a test bench. A limit sleeve is installed at the bottom outside of the positioning block assembly for restricting a screw adjustment sleeve, and a trapezoidal thread is provided on the inner side of the screw adjustment sleeve; a quick adjustment device is preset on the positioning block assembly for adjusting the diameter of a pre-positioning device according to the diameter of a suspension mounting hole, and an end cover is arranged at the upper end of the positioning block assembly; a pressing plate is sleeved on the positioning block assembly through a central hole, and through its central hole, it forms two states of "locking" and "loosening" by rotating an angle. The fixture of the present application needs to pre-install the positioning block assembly on the test bench, and by adjusting the pre-positioning structure of the positioning block assembly, it is applicable to different products; during the test, only the white body needs to be installed on the fixture, the pressing plate is clamped, and a wrench is used to quickly lock it; the installation operation is simplified.

Description

Technical Field

[0001] The present invention relates to the technical field of fixtures, and particularly to a fixture for white body torsional stiffness test. Background Art

[0002] During the white body torsional stiffness test, the white body is usually clamped / fixed by its suspension mounting points. Since all the mounting points are under the body, the traditional bolt fixing method is extremely inconvenient to operate. And it is often necessary to replace different fixing fixtures according to different white bodies. The installation operation is inconvenient and requires multiple people to cooperate.

[0003] In view of this, there is an urgent need to design a fixture for white body torsional stiffness test that is easy to operate, compatible with different vehicle models, avoids fixture replacement, and improves installation efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a fixture for white body torsional stiffness test to solve the problem of quick clamping and installation during the white body torsional stiffness test.

[0005] The technical problem to be solved by the present invention is realized through the following technical solutions:

[0006] A fixture for white body torsional stiffness test, comprising:

[0007] A positioning block assembly, which includes a positioning block base, a limit sleeve, a spiral adjustment sleeve, a quick adjustment device, a return tightening spring, and an end cover. The bottom of the positioning block assembly is provided with a positioning block base, and the bottom of the positioning block base is provided with mounting screw holes for pre-installing it on the test bench. The limit sleeve is composed of two semi-circular thin-walled sleeves and is installed at the bottom outside the positioning block assembly to restrain the spiral adjustment sleeve. The spiral adjustment sleeve is an annular thin-walled sleeve with trapezoidal threads on its inner side. The quick adjustment device is preset on the positioning block assembly to adjust the diameter of the pre-positioning device according to the diameter of the suspension mounting hole. The end cover is arranged at the upper end of the positioning block assembly;

[0008] A pressing plate, which is sleeved on the positioning block assembly through a central hole and forms two states of "locking" and "loosening" by rotating an angle through its central hole.

[0009] Preferably, the quick adjustment device includes an adjustment wedge block and a pre-positioning block. The adjustment wedge block is installed in the slots on both sides of the positioning block assembly and meshes with the threads in the spiral adjustment sleeve. When the spiral adjustment sleeve is rotated, the adjustment wedge block generates an axial movement. The pre-positioning block is arranged above the adjustment wedge block and the two are used in cooperation.

[0010] Preferably, the return tightening spring is installed in the installation groove on the periphery of the positioning block assembly to restrain the pre-positioning block and make it fit the adjustment wedge block.

[0011] Preferably, a locking screw is provided on the limit sleeve, and the locking screw is used to lock the adjusted screw adjustment sleeve.

[0012] Preferably, the end cover is formed by welding an outer ring block and a circular sheet, and is provided with two counter-bore holes for anti-loosening pin installation, two pre-positioning block installation grooves, two countersunk head screw installation holes, one center hole and one positioning pin hole.

[0013] Preferably, the center hole of the pressing plate is divided into three sections. The bottom section is a "circular hole", the middle section is a "waist-shaped hole", and the top section is a locking wedge surface.

[0014] Preferably, anti-loosening pin installation holes are provided on both sides of the center hole of the pressing plate.

[0015] Preferably, it further includes: an anti-loosening pin. When the pressing plate is in the "locked" state, the anti-loosening pin is inserted into any one of the anti-loosening pin installation holes to prevent the pressing plate from rotating and loosening due to vibration during testing.

[0016] Preferably, it further includes: a special wrench 500, which is used for rotating the pressing plate 300.

[0017] The above technical solutions of the present invention have the following beneficial effects:

[0018] (1) The fixture of the present application needs to pre-install the positioning block assembly on the test bench, and at the same time, by adjusting the pre-positioning structure of the positioning block assembly, it can be applicable to different products;

[0019] (2) During the test, only the white body needs to be installed on the fixture, the pressing plate is clamped and quickly locked with a wrench;

[0020] (3) Simplify the installation operation and avoid manual operation under the vehicle body;

[0021] (4) Provide a fixture solution that is fast, stable and highly compatible for the installation of the white body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0023] Figure 1 Schematic structural diagram of the invention support block assembly of the present invention;

[0024] Figure 2 is Figure 1 A-A cross-sectional view of;

[0025] Figure 3A X-axis side cross-sectional view in the unclamped state;

[0026] Figure 3B Axial sectional view of the Y-axis in the unclamped state;

[0027] Figure 4A Axial sectional view of the X-axis in the clamped state;

[0028] Figure 4B Axial sectional view of the Y-axis in the clamped state;

[0029] Figure 5 Schematic diagram of the end cover structure;

[0030] Figure 6A Schematic diagram of the pressure plate structure;

[0031] Figure 6B Another angle schematic diagram of the pressure plate structure;

[0032] Figure 7 For Figure 6A Sectional view B-B of;

[0033] Figure 8 Schematic diagram of the anti-loosening pin structure;

[0034] Figure 9A Schematic diagram of the special wrench structure;

[0035] Figure 9B Another angle schematic diagram of the special wrench structure.

[0036] Explanation of reference numerals:

[0037] 000, Schematic structure of the white body; 100, Positioning block assembly; 101, Positioning block base; 102, Limiting sleeve; 103, Spiral adjustment sleeve; 104, Adjusting wedge; 105, Pre-positioning block; 106, Return tightening spring; 107, Locking screw; 200, End cover; 201, First pre-positioning block installation groove; 202, Second pre-positioning block installation groove; 203, Countersunk screw installation hole; 204, Countersunk screw installation hole 2; 205, First anti-loosening pin installation counterbore; 206, Second anti-loosening pin installation counterbore; 207, Central hole; 208, Positioning pin hole; 300, Pressure plate; 301, Anti-loosening pin installation hole; 302, Anti-loosening pin installation hole 2; 303, Locking wedge surface; 400, Anti-loosening pin; 500, Special wrench. Detailed implementation manners

[0038] Now, various exemplary embodiments of the present invention will be described in detail. It should be noted that: Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0039] A fixture for the torsional stiffness test of a white body in white, including: a positioning block assembly 100, a pressing plate 300, a special wrench 500, a lock pin 400, etc. The following will be described in detail:

[0040] The positioning block assembly 100 includes a positioning block base 101, a limit sleeve 102, a spiral adjustment sleeve 103, a quick adjustment device, a return tightening spring 106, and an end cover 200. Specifically:

[0041] The positioning block base 101 is arranged at the bottom of the positioning block assembly 100. The positioning block base 101 has mounting screw holes at the bottom for pre-mounting it on the test bench.

[0042] The limit sleeve 102 is composed of two semi-circular thin-wall sleeves and is installed at the bottom outside the positioning block assembly 100 to restrict the spiral adjustment sleeve 103 and prevent axial displacement of the spiral adjustment sleeve.

[0043] The spiral adjustment sleeve 103 is an annular thin-wall sleeve with trapezoidal threads provided on its inner side.

[0044] A locking screw 107 is provided on the limit sleeve 102, and the locking screw 107 is used to lock the adjusted spiral adjustment sleeve 103.

[0045] The quick adjustment device is preset on the positioning block assembly 100 and is used to adjust the diameter of the pre-positioning device according to the diameter of the suspension mounting hole. The quick adjustment device includes: an adjustment wedge 104 and a pre-positioning block 105. The adjustment wedge 104 is installed in the grooves on both sides of the positioning block assembly 100 and meshes with the threads in the spiral adjustment sleeve 103. When the spiral adjustment sleeve 103 is rotated, the adjustment wedge 104 generates axial movement; the pre-positioning block 105 is arranged above the adjustment wedge 104, and the two are used in combination to adjust the diameter of the pre-positioning block (the part inserted into the suspension mounting hole) according to the axial movement distance of the adjustment wedge.

[0046] The return tightening spring 106 is installed in the installation groove on the peripheral side of the positioning block assembly 100 to restrict the pre-positioning block 105 and make it fit the adjustment wedge 104.

[0047] The end cover 200 is formed by welding an outer ring block and a circular sheet. It is provided with two anti-loosening pin mounting counterbores (the first anti-loosening pin mounting counterbore 205 and the second anti-loosening pin mounting counterbore 206), two pre-positioning block mounting grooves (the first pre-positioning block mounting groove 201 and the second pre-positioning block mounting groove 202), two countersunk head screw mounting holes (the first countersunk head screw mounting hole 203 and the second countersunk head screw mounting hole 204), a central hole 207 and a positioning pin hole 208. The end cover 200 is arranged at the upper end of the positioning block assembly 100. During installation, the head of the positioning block assembly 100 is inserted into the central hole 207 of the end cover. At the same time, it is necessary to align the position of the installation positioning pin hole and insert a positioning pin (a positioning similar to one plane and two pins is formed through 1 central hole and 1 positioning pin hole). And it is necessary to ensure that the pre-positioning block 105 is inserted into the pre-positioning block mounting groove position of the end cover 200.

[0048] The central hole of the pressing plate 300 is divided into three sections. The bottom section is a "round hole", the upper section is a "waist-shaped hole", and the top section is a locking wedge surface 303. On both sides of the central hole of the pressing plate 300, there are anti-loosening pin mounting holes (the first anti-loosening pin mounting hole 301 and the second anti-loosening pin mounting hole 302). The pressing plate 300 is sleeved on the positioning block assembly 100 through the central hole, and two states of "locking" and "loosening" are formed by rotating the pressing plate 300 through an angle through its central hole. When "locking", an anti-loosening screw can be inserted into either end on the pressing plate to prevent the pressing plate from rotating and loosening due to vibration during testing.

[0049] The anti-loosening pin 400, when the pressing plate 300 is "locked", the anti-loosening pin 400 is inserted into any one of the anti-loosening pin mounting holes to prevent the pressing plate 300 from rotating and loosening due to vibration during testing.

[0050] The special wrench 500 is used for rotating the pressing plate 300.

[0051] Installation and use of this application:

[0052] As shown in FIGS. 3 and 4, this application provides a fixture for white body torsional stiffness test, including a positioning block assembly 100, an end cover 200, a pressing plate 300, an anti-loosening screw 400, and a special wrench 500.

[0053] Installation grooves are symmetrically opened on both sides of the positioning block base 101 for installing the pre-positioning block adjustment mechanism (adjusting wedge 104 and pre-positioning block 105), and the adjustment mechanism is constrained in the installation groove by a return tightening spring 106. And by installing the end cover 201, the adjustment mechanism is completely constrained in the installation groove.

[0054] As shown in Figure 3, before use, first install the positioning block assembly 100 on the test bench, and according to the diameter data of the positioning holes of the white body to be tested, preset the positioning diameter of the pre-positioning block 105 by adjusting the screw adjustment sleeve 103, and keep the diameter of the pre-positioning block 105 1-2 mm smaller than the positioning hole diameter of the white body. After adjustment, lock the pre-positioning block 105 with the locking screw 107. Then quickly insert the white body 000 onto the pre-positioning block 105 of the positioning block assembly 100, then put on the pressure plate 300, and use a special wrench 500 to rotate the pressure plate 90° (when the chuck of the special wrench falls into the first anti-loosening pin installation hole 301 or the second anti-loosening pin installation hole 302 on the end cover 200).

[0055] As shown in Figure 4, after the above installation is completed, quickly manually insert a anti-loosening pin 400 into any anti-loosening pin installation hole to complete the installation.

[0056] Although the present invention has been disclosed above in embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various different selections and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is defined by the claims and their equivalent forms.

Claims

1. A fixture for the torsional stiffness test of a body in white, characterized in that Including: A positioning block assembly (100), which includes a positioning block base (101), a limit sleeve (102), a spiral adjustment sleeve (103), a quick adjustment device, a return tightening spring (106) and an end cover (200). The bottom of the positioning block assembly (100) is provided with the positioning block base (101). The bottom of the positioning block base (101) is provided with mounting screw holes for pre-mounting it on the test bench. The limit sleeve (102) is composed of two semi-circular thin-walled sleeves and is installed at the bottom outside of the positioning block assembly (100) to restrict the spiral adjustment sleeve (103). The spiral adjustment sleeve (103) is an annular thin-walled sleeve with trapezoidal threads on its inner side. The quick adjustment device is preset on the positioning block assembly (100) and is used to adjust the diameter of the pre-positioning device according to the diameter of the suspension mounting hole. The end cover (200) is arranged at the upper end of the positioning block assembly (100). The quick adjustment device includes an adjustment wedge block (104) and a pre-positioning block (105). The adjustment wedge block (104) is installed in the slots on both sides of the positioning block assembly (100) and meshes with the threads in the spiral adjustment sleeve (103). When the spiral adjustment sleeve (103) is rotated, the adjustment wedge block (104) generates axial movement. The pre-positioning block (105) is arranged above the adjustment wedge block (104) and they are used in cooperation. The return tightening spring (106) is installed in the mounting groove on the periphery of the positioning block assembly (100) to restrict the pre-positioning block (105) to fit the adjustment wedge block (104). A pressing plate (300), which is sleeved on the positioning block assembly (100) through a central hole and forms two states of "locking" and "loosening" by rotating through an angle through its central hole.

2. The fixture for the white body torsional stiffness test according to claim 1, characterized in that, A locking screw (107) is arranged on the limit sleeve (102), and the locking screw (107) is used to lock the adjusted spiral adjustment sleeve (103).

3. The fixture for the white body torsional stiffness test according to claim 1, characterized in that, The end cover (200) is welded by an outer ring block and a circular plate, and is provided with two counterbore holes for anti-loosening pin installation, two pre-positioning block installation grooves, two countersunk head screw installation holes, a central hole (207) and a positioning pin hole (208).

4. The fixture for the white body torsional stiffness test according to claim 1, characterized in that, The central hole of the pressing plate (300) is divided into three sections. The bottom section is a "round hole", the upper section is a "waist-shaped hole", and the top section is a locking wedge surface (303).

5. The fixture for the white body torsional stiffness test according to claim 1, wherein Anti-loosening pin installation holes are arranged on both sides of the central hole of the pressing plate (300).

6. The fixture for the white body torsional stiffness test according to claim 5, characterized in that, Also including: An anti-loosening pin (400). When the pressing plate (300) is in the "locking" state, the anti-loosening pin (400) is inserted into any one of the anti-loosening pin installation holes to prevent the pressing plate (300) from rotating and loosening due to vibration during testing.

7. The fixture for the white body torsional stiffness test according to claim 1, characterized in that Also including: A special wrench (500), which is used for rotating the pressing plate (300).

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