An adjustable suspension bracket mounting bolt tightening fixture

Abstract

The present invention relates to an adjustable suspension bracket mounting bolt tightening fixture, which comprises a fixture body, a first positioning piece, a first fastener, a second fastener and an adjustable nut. The first positioning piece is used to position a riveted product on the fixture body, and the riveted product is connected to a bolt to be driven through the product fastener; the first fastener and the second fastener are respectively provided on the fixture body on both sides of the first positioning piece; the first fastener and the second fastener fix the first positioning piece on the fixture body; the present invention provides an adjustable positioning pin on the fixture body, which can adjust the position, so there will be no problem of errors in the processing of the fixed positioning pin that affects the product assembly accuracy, and it is worthy of vigorous promotion.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile processing, and in particular relates to an adjustable suspension bracket mounting bolt tightening fixture, in particular to a processing fixture for products with high product precision requirements after the bolts are tightened. Background Art

[0002] Among the current engine suspension products, the suspension body installed on the longitudinal beam of the vehicle body adopts a cast aluminum structure, while the third-point bracket installed on the wheel hub package of the vehicle body adopts a sheet metal stamping structure. Bolts are generally used to connect the third-point sheet metal bracket to the suspension body. Since the engine suspension is connected to the vehicle body at one end and the engine at the other end, the assembly tolerance requirements are relatively strict. In order to ensure that the position of the suspension sheet metal bracket meets the design requirements after the bolts are tightened, it is necessary to design a special assembly fixture to fix the suspension assembly body and the sheet metal bracket, and then tighten the bolts to the designed torque. In the process of designing the bolt tightening fixture, in order to ensure that the suspension body and the sheet metal bracket can be easily removed and placed from the fixture, a gap needs to be designed between the fixture locating pin and the suspension body bracket and the sheet metal bracket. It is precisely because of the existence of the design gap and the fixture processing error that many suspension assemblies of this structure have deflected their sheet metal brackets after the bolts are tightened, and cannot pass the inspection of the suspension assembly inspection fixture.

[0003] In today's suspension products, bolted suspensions are appearing more and more frequently, and the requirements for such suspensions are becoming higher and higher. However, traditional bolted clamps still have many problems: since the positioning pins of the clamps are fixed and non-adjustable when they are processed, once a slight processing error occurs during the processing, the entire clamp will be scrapped;

[0004] In actual production and processing, most of the unqualified bolted suspensions are consistent with the above description. Since the fixture has been processed, usually, in order to compensate for the deflection of the sheet metal bracket, the assembly fixture needs to be repaired so that the suspension assembly size meets the requirements. However, this repair process is very cumbersome and requires a lot of time, energy and cost. In actual operation, the fixture is often knocked to make the product within the tolerance range, and the qualified rate is not very high. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustable suspension bracket mounting bolt tightening clamp to solve the above-mentioned problem and to solve the problem that the product rotates in the clamp due to the influence of torque during the bolting process, thereby solving the problem that the product qualification rate is not very high.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] An adjustable suspension bracket mounting bolt tightening fixture comprises a fixture body, a first positioning piece, a first fastener, a second fastener and an adjustable nut, wherein the first positioning piece is used to position a riveted product on the fixture body, and the riveted product is connected to a bolted part to be driven through the product fastener; a first fastener and a second fastener are respectively provided on the fixture body on both sides of the first positioning piece; the first fastener and the second fastener fix the first positioning piece on the fixture body.

[0008] As a further optimization scheme of the present invention, the first positioning member includes an adjustable positioning pin, a hole position matching with the adjustable positioning pin is provided on the riveted product, and a strip hole matching with the adjustable positioning pin is provided on the fixture body. The adjustable positioning pin passes through the hole position on the riveted product and the strip hole on the fixture body and is connected to an adjustable nut, and the adjustable nut is threadedly connected to the lower end of the adjustable positioning pin.

[0009] As a further optimization scheme of the present invention, the strip-shaped hole is a stepped hole, including an upper hole, a middle hole and a lower hole arranged in sequence from top to bottom, wherein the area of ​​the upper hole and the lower hole are both larger than the middle hole, the lower part of the adjustable positioning pin protrudes outward to form a limit block, the limit block is located in the upper hole, and the adjustable nut is located in the lower hole. The tightening torque of the adjustable nut cooperates with the limit block to fix the adjustable positioning pin on the fixture body.

[0010] As a further optimization scheme of the present invention, the first fastener includes a first adjustable bolt, and the second fastener includes a second adjustable bolt. The first adjustable bolt and the second adjustable bolt are respectively arranged on the left and right sides of the strip hole, and the long side of the strip hole is arranged in the left and right directions. The clamp body on the left and right sides of the strip hole is respectively provided with screw holes that cooperate with the first adjustable bolt and the second adjustable bolt, and one end of the screw hole is connected to the strip hole.

[0011] As a further optimization scheme of the present invention, the screw holes on the clamp body that cooperate with the first adjustable bolt and the second adjustable bolt are both connected to the upper hole of the strip hole, and the first adjustable bolt and the second adjustable bolt extend into the upper hole and clamp the limit block of the adjustable positioning pin. After the adjustable positioning pin is positioned by the nut, the limit block is fixed by the first adjustable bolt and the second adjustable bolt to achieve left and right limit fixation of the adjustable positioning pin.

[0012] As a further optimization solution of the present invention, the product fastener includes a product bolt, and the riveted product and the bolted part to be driven are provided with holes that match the product bolt. If necessary, the product bolt is threadedly connected to the riveted product.

[0013] As a further optimization scheme of the present invention, the bolt to be driven is connected to the fixture body through a second positioning member, the second positioning member includes a second positioning pin, the bolt to be driven is provided with a hole position that matches the second positioning pin, and the second positioning pin is fixedly connected to the fixture body. The second positioning pin is used to position the bolt to be driven, and can also serve as a rotation axis of the bolt to be driven when the fixture is debugged.

[0014] A debugging method for an adjustable suspension bracket mounting bolt tightening fixture comprises the following steps:

[0015] 1. Pass the adjustable positioning pin through the fixture body and initially fix it on the fixture body with the adjustable nut. At this time, the adjustable nut is not tightened, and then the first adjustable bolt and the second adjustable bolt are screwed into the screw holes of the fixture body;

[0016] 2. Place the riveted product on the fixture body, and also place the bolts to be driven on the fixture body for preliminary positioning with the riveted product;

[0017] 3. Preliminarily adjust the position of the bolt to be driven and the riveted product. After the adjustment is completed, tighten the adjustable nut, fix the adjustable positioning pin, and then tighten the first adjustable bolt and the second adjustable bolt;

[0018] 4. Connect the product bolts to the bolted parts and riveted products to be bolted, and use a torque wrench to reach the required torque to assemble the product;

[0019] 5. Carry out product inspection on the completed assembled product. If it is qualified, the fixture has been adjusted. If it is unqualified, proceed to the next step;

[0020] 6. Loosen the unqualified product bolts, then loosen the adjustable nut, the first adjustable bolt and the second adjustable bolt. At this time, the adjustable positioning pin can slide in the strip hole, so that the riveted product can be rotated in the direction that meets the assembly requirements. Then tighten the adjustable nut, the first adjustable bolt and the second adjustable bolt, and then use a torque wrench to hit the product bolts to the required torque to form an assembled product.

[0021] 7. Repeat steps 5 and 6 until the assembled product passes the inspection, and the debugging is completed.

[0022] As a further optimization solution of the present invention, the product testing method is to put the assembled product into a checking fixture or a three-coordinate measuring machine for testing.

[0023] The beneficial effects of the present invention are:

[0024] 1) The present invention provides an adjustable positioning pin on the fixture body, which can adjust the position, so there will be no problem of errors in the processing of fixed positioning pins that affect the assembly accuracy of the product;

[0025] 2) The present invention is also conducive to re-debugging when the fixture is worn due to long-term use, thereby reducing errors and avoiding the problem of unqualified product assembly;

[0026] 3) The difference between the present invention and the traditional bolting clamp is that it can be adjusted according to the actual situation, which is very helpful to improve the accuracy and reliability of the bolt suspension product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the facade structure of the present invention in Example 1 Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the facade structure of the present invention in Example 1 Figure 2 ;

[0029] Figure 3 It is a schematic diagram of the bottom structure of the present invention in embodiment 1.

[0030] In the figure: a fixture body 1, a first positioning member 2, a first fastener 3, a second fastener 4, an adjustable nut 5, a strip hole 6, a riveted product 100, a product fastener 101, and a bolt member 102 to be driven. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0032] like Figure 1-3 As shown, an adjustable suspension bracket mounting bolt tightening fixture includes a fixture body 1, a first positioning member 2, a first fastener 3, a second fastener 4 and an adjustable nut 5, wherein the first positioning member 2 is used to position a riveted product 100 on the fixture body 1, and the riveted product 100 is connected to a bolt member 102 to be driven through a product fastener 101; the first fastener 3 and the second fastener 4 are respectively provided on the fixture body 1 on both sides of the first positioning member 2; the first fastener 3 and the second fastener 4 fix the first positioning member 2 on the fixture body 1.

[0033] The first positioning member 2 includes an adjustable positioning pin, a hole position matching with the adjustable positioning pin is provided on the riveted product 100, and a strip hole 6 matching with the adjustable positioning pin is provided on the fixture body 1. The adjustable positioning pin passes through the hole position on the riveted product 100 and the strip hole 6 on the fixture body 1 and is then connected to the adjustable nut 5, and the adjustable nut 5 is threadedly connected to the lower end of the adjustable positioning pin.

[0034] The strip hole 6 is a stepped hole, including an upper hole, a middle hole and a lower hole arranged in sequence from top to bottom, wherein the area of ​​the upper hole and the lower hole are both larger than the middle hole, the lower part of the adjustable positioning pin protrudes outward to form a limit block, the limit block is located in the upper hole, and the adjustable nut 5 is located in the lower hole. The tightening torque of the adjustable nut 5 cooperates with the limit block to fix the adjustable positioning pin on the fixture body 1.

[0035] The first fastener 3 includes a first adjustable bolt, and the second fastener 4 includes a second adjustable bolt. The first adjustable bolt and the second adjustable bolt are respectively arranged on the left and right sides of the strip hole 6. The long side of the strip hole 6 is arranged in the left and right directions. The clamp body 1 on the left and right sides of the strip hole 6 is respectively provided with screw holes that cooperate with the first adjustable bolt and the second adjustable bolt, and one end of the screw hole is connected to the strip hole 6.

[0036] Preferably, the screw holes on the clamp body 1 that cooperate with the first adjustable bolt and the second adjustable bolt are both connected to the upper hole of the strip hole 6, and the first adjustable bolt and the second adjustable bolt extend into the upper hole and clamp the limit block of the adjustable positioning pin. After the adjustable positioning pin is positioned by the nut, the limit block is fixed by the first adjustable bolt and the second adjustable bolt to achieve left and right limit fixation of the adjustable positioning pin.

[0037] The product fastener 101 includes a product bolt, and holes for matching with the product bolt are provided on the riveted product 100 and the bolt member 102 to be driven. If necessary, the product bolt is threadedly connected with the riveted product 100.

[0038] Preferably, the bolt member 102 to be driven is connected to the fixture body 1 through a second positioning member, the second positioning member includes a second positioning pin, the bolt member 102 to be driven is provided with a hole position matched with the second positioning pin, and the second positioning pin is fixedly connected to the fixture body 1. The second positioning pin is used to give the bolt member 102 to be driven a position.

[0039] The debugging method of the adjustable bolt driving clamp of the present invention comprises the following steps:

[0040] 1. Pass the adjustable positioning pin through the clamp body 1 and use the adjustable nut 5 to initially fix it on the clamp body 1. At this time, the adjustable nut 5 is not tightened, and then the first adjustable bolt and the second adjustable bolt are screwed into the screw holes of the clamp body 1;

[0041] 2. Place the riveted product 100 on the fixture body 1, and also place the bolt 102 to be driven on the fixture body 1 to perform preliminary positioning with the riveted product 100;

[0042] 3. Preliminarily adjust the position of the bolt 102 to be driven and the riveted product 100. After the adjustment is completed, tighten the adjustable nut 5, fix the adjustable positioning pin, and then tighten the first adjustable bolt and the second adjustable bolt;

[0043] Fourth, connect the product bolts to the bolt member 102 to be driven and the riveted product 100, and use a torque wrench to drive to the required torque to form an assembled product;

[0044] 5. Carry out product inspection on the completed assembled product. If it is qualified, the fixture has been adjusted. If it is unqualified, proceed to the next step;

[0045] 6. Loosen the unqualified product bolts, and then loosen the adjustable nut 5, the first adjustable bolt and the second adjustable bolt. At this time, the adjustable positioning pin can slide in the strip hole 6, so that the riveted product 100 can be rotated in the direction that meets the assembly requirements (as described in the background technology, there is a tolerance between the fixture body 1 and the riveted product 100), and then tighten the adjustable nut 5, the first adjustable bolt and the second adjustable bolt, and then use a torque wrench to hit the product bolts to the required torque to form an assembled product;

[0046] 7. Repeat steps 5 and 6 until the assembled product passes the inspection, and the debugging is completed.

[0047] Preferably, the method of product testing is to place the assembled product into a check fixture or to measure the three coordinates using a three-coordinate measuring machine to determine whether the product is qualified.

[0048] Embodiment 1

[0049] (1) The bolt member 102 to be driven: The material of the bolt member 102 to be driven in this embodiment is SPHC, and the mounting position of the member on the vehicle body is a circular hole. The material of the bolt member 102 to be driven here can also be made of other materials.

[0050] (2) Product bolts: The product bolts in this embodiment are made of 40Cr Dacromet-treated bolts; other bolts may also be used for the product bolts;

[0051] (3) Riveted product 100: In this embodiment, the upper and lower brackets of the riveted product 100 are made of A380; the material of the riveted product 100 here can also be made of other materials;

[0052] (4) Fixture body 1: The plate material is P20, and the rest is 40Cr; the material of the fixture body 1 here can also be made of other materials;

[0053] (5) Adjustable positioning pin: The adjustable positioning pin is made of 40Cr;

[0054] (6) The first adjustable bolt and the second adjustable bolt: These two bolts are made of 40Cr hexagon socket bolts, but other materials may also be used;

[0055] (7) Adjustable nut 5: The adjustable nut 5 is a nut that matches the adjustable positioning pin and is made of 40Cr.

[0056] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An adjustable suspension bracket mounting bolt tightening fixture, characterized in that: The clamp body comprises a first positioning member, a first fastener, a second fastener and an adjustable nut. The first positioning member is used to position the riveted product on the clamp body, and the riveted product is connected to the bolt to be driven through the product fastener. The first fastener and the second fastener are respectively provided on the clamp body on both sides of the first positioning member. The first fastener and the second fastener fix the first positioning member on the clamp body. The first positioning member includes an adjustable positioning pin, a hole position matching with the adjustable positioning pin is provided on the riveted product, a strip hole matching with the adjustable positioning pin is provided on the fixture body, the adjustable positioning pin passes through the hole position on the riveted product and the strip hole on the fixture body and then is connected with an adjustable nut, and the adjustable nut is threadedly connected with the lower end of the adjustable positioning pin; The strip-shaped hole is a stepped hole, including an upper hole, a middle hole and a lower hole arranged in sequence from top to bottom, wherein the areas of the upper hole and the lower hole are both larger than the middle hole, the lower part of the adjustable positioning pin protrudes outward to form a limit block, the limit block is located in the upper hole, the adjustable nut is located in the lower hole, and the tightening torque of the adjustable nut cooperates with the limit block to fix the adjustable positioning pin on the fixture body; The first fastener includes a first adjustable bolt, and the second fastener includes a second adjustable bolt. The first adjustable bolt and the second adjustable bolt are respectively arranged on the left and right sides of the strip hole. The long side of the strip hole is arranged in the left and right directions. The clamp body on the left and right sides of the strip hole is respectively provided with screw holes that match the first adjustable bolt and the second adjustable bolt, and one end of the screw hole is connected to the strip hole. The screw holes on the clamp body that cooperate with the first adjustable bolt and the second adjustable bolt are connected to the upper hole of the strip hole. The first adjustable bolt and the second adjustable bolt extend into the upper hole and clamp the limit block of the adjustable positioning pin. After the adjustable positioning pin is positioned by the nut, the limit block is fixed by the first adjustable bolt and the second adjustable bolt to achieve left and right limit fixation of the adjustable positioning pin.

2. The adjustable suspension bracket mounting bolt tightening fixture according to claim 1, characterized in that: The product fasteners include product bolts, and holes that match the product bolts are provided on the riveted products and the bolted parts to be driven.

3. The adjustable suspension bracket mounting bolt tightening fixture according to claim 1, characterized in that: The bolt to be driven is connected to the fixture body through a second positioning member, the second positioning member includes a second positioning pin, and a hole matching the second positioning pin is provided on the bolt to be driven, and the second positioning pin is fixedly connected to the fixture body.

4. A method for debugging an adjustable suspension bracket mounting bolt tightening fixture according to any one of claims 1 to 3, characterized in that: The following steps are involved:

1. Pass the adjustable positioning pin through the fixture body and initially fix it on the fixture body with the adjustable nut. At this time, the adjustable nut is not tightened, and then the first adjustable bolt and the second adjustable bolt are screwed into the screw holes of the fixture body; 2. Place the riveted product on the fixture body, and also place the bolts to be driven on the fixture body for preliminary positioning with the riveted product; 3. Preliminarily adjust the position of the bolt to be driven and the riveted product. After the adjustment is completed, tighten the adjustable nut, fix the adjustable positioning pin, and then tighten the first adjustable bolt and the second adjustable bolt; 4. Connect the product bolts to the bolted parts and riveted products to be bolted, and use a torque wrench to reach the required torque to assemble the product; 5. Carry out product inspection on the completed assembled product. If it is qualified, the fixture has been adjusted. If it is unqualified, proceed to the next step; 6. Loosen the unqualified product bolts, then loosen the adjustable nut, the first adjustable bolt and the second adjustable bolt. At this time, the adjustable positioning pin can slide in the strip hole, so that the riveted product can be rotated in the direction that meets the assembly requirements. Then tighten the adjustable nut, the first adjustable bolt and the second adjustable bolt, and then use a torque wrench to hit the product bolts to the required torque to form an assembled product.

7. Repeat steps 5 and 6 until the assembled product passes the inspection, and the debugging is completed.

5. The debugging method of the adjustable suspension bracket mounting bolt tightening fixture according to claim 4 is characterized in that: The product testing method is to put the assembled product into a check fixture or a three-coordinate measuring machine for testing.

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