Clamp used for fender support detection

Abstract

The utility model provides a clamp used for mudguard support detection. The clamp comprises a clamp bottom plate and a vertical plate vertically arranged on the clamp bottom plate. The vertical plate is provided with a through hole used for detection. The two sets of positioning assemblies are arranged on the upper section and the lower section of the vertical plate respectively, each positioning assembly comprises a movable positioning pin, a positioning sleeve and a flat gasket, the positioning sleeves are arranged on the vertical plate in a penetrating mode, one ends of the movable positioning pins are movably arranged in the positioning sleeves in a penetrating mode and matched with the positioning sleeves in a threaded mode, and the other ends of the movable positioning pins can be inserted into positioning holes of the fender support; the flat gasket is arranged on the vertical plate beside the positioning sleeve; the pressing assembly comprises a pressing plate, a hexagonal flange face bolt and a pressing sleeve, the pressing sleeve is embedded in the middle section of the vertical plate, the hexagonal flange face bolt is arranged in the pressing sleeve in a penetrating mode, and the pressing plate is in a Y shape. According to the utility model, the operation is simple and reliable, the detection value is more accurate, and the versatility and universality are very strong. The device is not limited to the detection of the fender bracket, and is also suitable for the detection of other bracket products.

Description

Technical Field

[0001] The utility model relates to a clamp technology, in particular to a clamp used for detecting a fender bracket. Background Art

[0002] Bracket products play the role of connection and fixing, especially when used on vehicles. They must not only have sufficient strength, but also be strictly controlled in terms of weight. This makes the shape of the bracket products complex and lacks a large reference surface, which is not only not conducive to processing, but also brings great difficulties to product testing. Among them, the fender bracket used on heavy trucks fully possesses the above difficulties. There are many sizes and multiple angle sizes. The product reference is composed of the top surfaces of multiple holes. In addition to the requirements of position, flatness and other form and position tolerances, the above detection requirements cannot be completed by ordinary measuring tools at all, and can only be detected on three coordinates. However, due to the complex shape of the fender bracket, no matter how it is placed with the help of ordinary fixtures, there will be parts that cannot be detected by three coordinates. It can only be placed and tested multiple times, resulting in the detection value deviating from the true value of the product size. Therefore, it is very necessary to complete the detection of all dimensions and form and position tolerances in one clamping. In addition, the blind hole is a reference hole and needs to be positioned with a locating pin, but the blind hole is blocked by the locating pin, so the blind hole cannot be detected. The above problems need to be solved urgently. Utility Model Content

[0003] The purpose of the utility model is to propose a fixture for detecting mudguard brackets in view of the above-mentioned problems. The fixture is a convenient fixture suitable for high-precision detection of heavy-duty truck mudguard brackets with complex shapes on three coordinates. The fixture comprises a centering function, an elastic surface-fixing function and a convenient clamping function, so that the mudguard bracket can be clamped upright, and all parts that need to be detected can be exposed, ensuring that the three-coordinate can detect every part that needs to be detected, and realizing the detection of all dimensions and form and position tolerances of the mudguard bracket in one clamping on the three-coordinate, so that the detection value is more accurate and closer to the true value of the mudguard bracket size, providing a solid and powerful guarantee for the processing process detection and finished product detection of the mudguard bracket.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a fixture for fender bracket detection, comprising a fixture bottom plate and a vertical plate vertically arranged on the fixture bottom plate, wherein a positioning component and a pressing component are arranged on the vertical plate;

[0005] The vertical plate is provided with a through hole for detection, and the through hole for detection can expose all the parts of the fender bracket that need to be detected. The size of the through hole for detection should ensure that the three-coordinate probe can enter the through hole to detect the reference surface and the surface to be detected of the fender bracket;

[0006] The positioning assembly consists of two groups, which are respectively arranged on the upper and lower sections of the vertical plate, and the positioning assembly includes a movable positioning pin, a positioning sleeve and a flat pad, the positioning sleeve is inserted into the vertical plate, one end of the movable positioning pin is movably inserted into the positioning sleeve and cooperates with the positioning sleeve thread, and the positioning sleeve and the movable positioning pin play a centering role; the other end of the movable positioning pin can be inserted into the positioning hole of the mudguard bracket; a thread is designed in the middle part of the movable positioning pin, which adopts a low-grade loose fit with the positioning sleeve and can be screwed in two buckles, which plays a limiting role, so that the movable positioning pin will not move backward, and the movable positioning pin will be pushed out when the mudguard bracket is installed, and the centering role cannot be played; the flat pad is arranged on the vertical plate next to the positioning sleeve; the positioning surface of the positioning sleeve and the flat pad can only be positioned with the edge part of the reference surface of the mudguard bracket, and cannot cover the middle part of the reference surface, that is, the middle part of the reference surface must be exposed; the design of the positioning assembly makes the centering function both stable and reliable, and convenient;

[0007] The clamping assembly includes a pressing plate, a hexagonal flange bolt and a clamping sleeve, the pressing sleeve is embedded in the middle section of the vertical plate, the hexagonal flange bolt is inserted into the clamping sleeve, and the clamping assembly adopts the method of embedding the clamping sleeve into the vertical plate. This is because the vertical plate is made of aluminum and directly connecting it with the hexagonal flange bolt will easily cause buckling, which greatly extends the service life of the vertical plate; the pressing plate is Y-shaped, and a special-shaped through hole that can be sleeved on the hexagonal flange bolt is arranged in the middle part, and the special-shaped through hole includes a connected large opening (the upper end of the special-shaped through hole) and a small opening (the lower end of the special-shaped through hole), that is, the middle part of the pressing plate adopts a large opening and a small opening connected, the inner diameter of the large opening is larger than the head of the hexagonal flange bolt, and the inner diameter of the small opening is smaller than the head of the hexagonal flange bolt; when the hexagonal flange bolt is rotated, when there is a gap between the hexagonal flange bolt and the pressing plate in the horizontal direction, the pressing plate is moved down so that the head of the hexagonal flange bolt is located in the large opening of the pressing plate, and the pressing plate can be taken out, which is very convenient.

[0008] Furthermore, the three ends of the Y-shaped pressure plate are pressure points, which respectively match the blank surface of the fender bracket. This not only ensures stable pressing, but also exposes the part to be tested.

[0009] Furthermore, the vertical plate is an aluminum plate, which is convenient for the clamp to be easily taken or loaded and unloaded.

[0010] Furthermore, a rib plate is arranged between the side of the vertical plate away from the fender bracket to be clamped and the bottom plate of the clamp. The rib plate, the vertical plate and the bottom plate are connected by hexagon socket bolts and cylindrical pins, and the arrangement of the rib plate ensures that the clamp has sufficient rigidity and strength.

[0011] Furthermore, there are two ribs.

[0012] Furthermore, the positioning function of the utility model includes two parts: hard positioning and soft positioning. The end face of the positioning sleeve plays a hard positioning role, and the flat pad is made of POM (polyoxymethylene) hard plastic material, and its end face plays a soft positioning role, realizing elastic positioning, so that the fender bracket will not undergo plastic deformation during the clamping process, thereby effectively avoiding the deviation of the detection value from the true value of the fender bracket size due to deformation.

[0013] Furthermore, the end surface of the positioning sleeve and the end surface of the flat washer are in the same plane.

[0014] Furthermore, an adjusting screw is vertically arranged on the bottom plate, and the adjusting screw supports the fender bracket at the bottom, thereby ensuring that the fender bracket will not move after the movable positioning pin is moved out.

[0015] The working principle of the fixture for fender bracket inspection is as follows:

[0016] Place the jig for fender bracket inspection on the three-coordinate workbench, close to the standard positioning block. First, insert the movable positioning pin in the positioning assembly into the positioning sleeve, and screw in two threads to ensure that the movable positioning pin cannot move backward; then install the fender bracket into the jig, align the positioning hole of the fender bracket with the movable positioning pin, and gradually install it, so that the reference surface of the fender bracket is close to the positioning surface of the positioning sleeve and the flat pad in the positioning assembly; adjust the adjustment screw in the bottom plate assembly to slightly lift the fender bracket; align the large mouth of the pressure plate in the clamping assembly with the head of the hexagonal flange bolt, move the pressure plate upward, let the small mouth of the pressure plate be inserted into the rod of the hexagonal flange bolt, and the three pressure points of the pressure plate are close to the blank surface of the fender bracket, and lightly tighten the hexagonal flange bolt. At this time, gently rotate the two movable positioning pins by hand. If they cannot be rotated, adjust the adjustment screw in the bottom plate assembly again until the movable positioning pin can be rotated. Tighten the hexagonal flange bolts to press the pressure plate, unscrew the two movable positioning pins, and the fender bracket to be tested is fixed above the adjustment screw and between the vertical plate and the pressure plate, and then three-coordinate detection is performed. After the detection is completed, first screw in the two movable positioning pins, drop the adjustment screw, then loosen the hexagonal flange bolts, move down to remove the pressure plate, and finally remove the fender bracket. Repeat the above steps when installing the fender bracket again.

[0017] The utility model relates to a three-coordinate fixture for detecting a fender bracket, and specifically relates to a fixture for high-precision detection of a fender bracket used on a heavy truck on three coordinates. Compared with the prior art, the utility model has the following advantages:

[0018] 1) The utility model installs a high vertical plate on the bottom plate, and the rear side of the vertical plate is reinforced with a rib plate (angle plate), so that it has sufficient rigidity and strength. The mudguard bracket is placed vertically on the vertical plate, and the overall center of gravity is in the middle part of the bottom plate, so that it is safe and reliable.

[0019] 2) The utility model arranges a positioning sleeve and a flat washer on the vertical plate. The end face of the positioning sleeve and the end face of the flat washer are in the same plane, and are surface positioned with the reference plane formed by the end faces of each key hole of the fender bracket, so that the reference plane of the fender bracket is perpendicular to the bottom surface, providing the basic condition for completing the detection of all dimensions in one clamping.

[0020] 3) The blind hole of the fender bracket is the reference hole, so the positioning pin is designed to be movable. The movable positioning pin is inserted into the blind hole and pressed after positioning. Then the positioning pin is removed and three-coordinate detection is performed. This realizes the detection of all dimensions and form and position tolerances of the fender bracket in one clamping. Such a fixture solution can be applied to most bracket products and can be widely used.

[0021] In summary, the utility model is easy to operate, reliable, has more accurate detection values, and has strong versatility and extensiveness. The utility model is not limited to the detection of fender brackets, but is also suitable for the detection of other similar products that cannot effectively place brackets. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The structure diagram of the fixture for detecting the fender bracket of a heavy truck is shown in FIG. Figure 1 ;

[0023] Figure 2 The structure diagram of the fixture for detecting the fender bracket of a heavy truck is shown in FIG. Figure 2 ;

[0024] Figure 3 The structure of the fixture used for heavy truck fender bracket detection is shown in the following figure. Figure 1 ;

[0025] Figure 4 The structure of the fixture used for heavy truck fender bracket detection is shown in the following figure. Figure 2 ;

[0026] Figure 5 It is a structural schematic diagram of the pressure plate.

[0027] Figure numerals: 1. fixture base plate assembly; 2. vertical plate assembly; 3. positioning assembly; 4. clamping assembly; 5. movable positioning pin; 6. positioning sleeve; 7. flat washer; 8. adjustment screw; 9. pressure plate; 10. hexagonal flange bolt; 11. rib plate; 12. clamping sleeve. DETAILED DESCRIPTION

[0028] The present invention is further described below with reference to the embodiments:

[0029] Example 1

[0030] This embodiment discloses a fixture for fender bracket detection, such as Figure 1-4 As shown, it comprises a fixture bottom plate 1 and a vertical plate 2 vertically arranged on the fixture bottom plate 1, and a positioning component 3 and a pressing component 4 are arranged on the vertical plate 2;

[0031] The vertical plate 2 is provided with a through hole for detection, which can expose all the parts of the fender bracket that need to be detected. The size of the through hole for detection should ensure that the three-coordinate probe can enter the through hole to detect the reference surface and the surface to be detected of the fender bracket; the vertical plate 2 is away from the side of the fender bracket to be clamped, and two ribs 11 are arranged between the clamp bottom plate 1. The ribs 11, the vertical plate 2 and the bottom plate 1 are connected by hexagon socket bolts and cylindrical pins. The provision of the ribs 11 ensures that the clamp has sufficient rigidity and strength.

[0032] The positioning assembly 3 is divided into two groups, which are respectively arranged in the upper and lower sections of the vertical plate 2. The positioning assembly 3 includes a movable positioning pin 5, a positioning sleeve 6 and a flat washer 7. The positioning sleeve 6 is inserted into the vertical plate 2, and one end of the movable positioning pin 5 is movably inserted into the positioning sleeve 6 and cooperates with the positioning sleeve thread. The positioning sleeve 6 and the movable positioning pin 5 play a centering role; the other end of the movable positioning pin 5 can be inserted into the positioning hole of the mudguard bracket; a thread is designed in the middle part of the movable positioning pin 5, which adopts a low-grade loose fit with the positioning sleeve 6 and can be screwed in twice, which plays a limiting role, so that the movable positioning pin 5 will not move backward, preventing the movable positioning pin 5 from being pushed out when the mudguard bracket is installed and failing to play a centering role; the flat washer 7 is arranged on the vertical plate 2 next to the positioning sleeve 6; the end face of the positioning sleeve 6 and the end face of the flat washer 7 are in the same plane. The positioning function of the utility model includes two parts: hard positioning and soft positioning. The end face of the positioning sleeve 6 plays a hard positioning role, and the flat pad 7 is made of POM (polyoxymethylene) hard plastic material. Its end face plays a soft positioning role, realizing elastic positioning, so that the mudguard bracket will not undergo plastic deformation during the clamping process, thus effectively avoiding the deviation of the detection value from the true value of the mudguard bracket size due to deformation. The positioning surface of the positioning sleeve 6 and the flat pad 7 can only be positioned with the edge of the mudguard bracket reference surface, and cannot cover the middle part of the reference surface, that is, the middle part of the reference surface must be exposed; the design of the positioning component 3 makes the centering function both stable and reliable, and convenient;

[0033] The clamping assembly 4 includes a clamping plate 9, a hexagonal flange bolt 10 and a clamping sleeve 12. The clamping sleeve 12 is embedded in the middle section of the vertical plate 2. The hexagonal flange bolt 10 is inserted into the clamping sleeve 12. The clamping assembly 4 adopts the method of embedding the clamping sleeve into the vertical plate 2. Since the vertical plate 2 is made of aluminum, it is easy to cause buckling when directly connected to the hexagonal flange bolt 10. This greatly prolongs the service life of the vertical plate 2. The clamping plate 9 is Y-shaped, and a special screw thread that can be mounted on the hexagonal flange bolt 10 is provided in the middle. The special-shaped through hole includes a large opening (the upper end of the special-shaped through hole) and a small opening (the lower end of the special-shaped through hole) that are connected, that is, the middle part of the pressure plate 9 is connected by a large opening and a small opening, the inner diameter of the large opening is larger than the head of the hexagonal flange bolt 10, and the inner diameter of the small opening is smaller than the head of the hexagonal flange bolt 10; when the hexagonal flange bolt 10 is rotated, when there is a gap between the hexagonal flange bolt 10 and the pressure plate 9 in the horizontal direction, the pressure plate 9 is moved downward so that the head of the hexagonal flange bolt 10 is located in the large opening of the pressure plate 9, and the pressure plate 9 can be taken out, which is very convenient. The three ends of the Y-shaped pressure plate 9 are provided with multiple (for example, three) pressure points, and the pressure points are respectively matched with the blank surface of the fender bracket. This not only ensures stable compression, but also exposes the part to be tested.

[0034] The bottom plate 1 is vertically provided with an adjusting screw 8. With the support of the fender bracket at the bottom by the adjusting screw, it is ensured that the fender bracket will not move after the movable positioning pin 5 is moved out.

[0035] The working principle of the fixture for fender bracket inspection is as follows:

[0036] Place the fixture for fender bracket inspection on the three-coordinate workbench, close to the standard positioning block. First, insert the movable locating pin 5 in the locating assembly 3 into the locating sleeve 6, and screw in two threads to ensure that the movable locating pin 5 cannot move backward; then install the fender bracket into the fixture, align the locating hole of the fender bracket with the movable locating pin 5, and install it step by step, so that the reference surface of the fender bracket is close to the locating surface of the locating sleeve 6 and the flat pad 7 in the upper positioning assembly; adjust the adjusting screw 8 in the bottom plate assembly 1 to slightly lift the fender bracket; align the large mouth of the pressure plate 9 in the clamping assembly 4 with the head of the hexagonal flange bolt 10, move the pressure plate upward, let the small mouth of the pressure plate 9 be inserted into the rod of the hexagonal flange bolt 10, and the three pressure points of the pressure plate 9 are close to the blank surface of the upper fender bracket, and lightly tighten the hexagonal flange bolt 10. At this time, gently rotate the two movable locating pins 5 by hand. If they cannot be rotated, adjust the adjusting screw 8 in the positioning assembly 3 again until the movable locating pin 5 can be rotated. Tighten the hexagonal flange bolt 10 to compress the pressure plate 9, unscrew the two movable positioning pins 5, and the fender bracket to be tested is fixed above the adjustment screw 8, between the vertical plate 2 and the pressure plate 9, and then perform three-coordinate detection. After the detection is completed, first screw in the two movable positioning pins 5, drop the adjustment screw 8, then loosen the hexagonal flange bolt 10, move down to remove the pressure plate 9, and finally remove the fender bracket. Repeat the above steps when installing the fender bracket again.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A fixture for fender bracket detection, characterized in that: It comprises a fixture bottom plate (1) and a vertical plate (2) vertically arranged on the fixture bottom plate (1), wherein a positioning component (3) and a pressing component (4) are arranged on the vertical plate (2); The vertical plate (2) is provided with a through hole for detection; The positioning assembly (3) is composed of two groups, which are respectively arranged on the upper section and the lower section of the vertical plate (2). The positioning assembly (3) comprises a movable positioning pin (5), a positioning sleeve (6) and a flat washer (7). The positioning sleeve (6) is inserted into the vertical plate (2). One end of the movable positioning pin (5) is movably inserted into the positioning sleeve (6) and is threadably matched with the positioning sleeve, and the other end can be inserted into the positioning hole of the fender bracket. The flat washer (7) is arranged on the vertical plate (2) next to the positioning sleeve (6). The clamping assembly (4) comprises a clamping plate (9), a hexagonal flange bolt (10) and a clamping sleeve (12), wherein the clamping sleeve (12) is embedded in the middle section of the vertical plate (2), and the hexagonal flange bolt (10) is inserted into the clamping sleeve (12). The clamping plate (9) is Y-shaped, and a special-shaped through hole is provided in the middle portion thereof, which can be sleeved on the hexagonal flange bolt (10), and the special-shaped through hole comprises a large opening and a small opening which are connected to each other, wherein the inner diameter of the large opening is larger than the head of the hexagonal flange bolt (10), and the inner diameter of the small opening is smaller than the head of the hexagonal flange bolt (10).

2. The fixture for fender bracket detection according to claim 1, characterized in that: The vertical plate (2) is an aluminum plate.

3. The fixture for fender bracket detection according to claim 1, characterized in that: A rib plate (11) is provided between the side of the upright plate (2) facing away from the fender support to be clamped and the clamp bottom plate (1).

4. The fixture for fender bracket detection according to claim 1, characterized in that: The flat pad (7) is made of POM hard plastic material.

5. The fixture for fender bracket detection according to claim 1, characterized in that: The end surface of the positioning sleeve (6) and the end surface of the flat washer (7) are in the same plane.

6. The fixture for fender bracket detection according to claim 1, characterized in that: An adjustment screw (8) is vertically arranged on the fixture bottom plate (1).

7. The fixture for fender bracket detection according to claim 1, characterized in that: The three ends of the Y-shaped pressing plate (9) are pressing points, and the pressing points are respectively matched with the blank surface of the fender bracket.

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