Dimension detection device for drum brake pad of automobile

Abstract

The invention discloses an automobile drum brake pad size detection device which comprises a base, a supporting seat is fixedly connected to the rear side of the upper end of the base, a top seat is fixedly connected to the upper end of the supporting seat, a rotating seat is arranged in the middle of the upper portion of the base, and a plurality of containing grooves are evenly formed in the side face of the rotating seat and distributed in a circumferential matrix mode. Compared with the prior art, the device has the advantages that the stepping motor can drive the rotating shaft to rotate so as to drive the rotating seat to rotate, and the rotating seat rotates to drive the drum brake pad to rotate to replace different detection point positions; the distance between left and right hole sites and the distance between front and rear hole sites can be detected, the upper and lower arc surfaces of the drum brake pad are respectively attached to the placing groove and the outer arc attaching seat, and the thickness detection mechanism can synchronously and accurately detect the inner and outer arc degrees, the hole sites and the thickness of the drum brake pad so as to ensure that the size of the drum brake pad is qualified. And follow-up assembly of a user is facilitated.

Description

Technical Field

[0001] This invention relates to the field of brake pad testing technology, specifically to a device for testing the size of automotive drum brake pads. Background Technology

[0002] After the production of automotive drum brake pads is completed, the dimensions and positions of the inner and outer curved surfaces and the reserved holes must be inspected. At the same time, the thickness of the drum brake pads must also be inspected to ensure that they are properly assembled with the automotive brake drum.

[0003] The invention, as described in authorization announcement CN119103983A, comprises: a base with a mounting arm vertically mounted on its top surface; a counterweight slidably connected to the side of the mounting arm, the counterweight sliding vertically, and a detection rod vertically mounted on its bottom surface; a grating ruler vertically mounted on the side of the mounting arm, the grating reading head of the grating ruler being fixedly connected to the counterweight; and a detection platform detachably mounted on the top surface of the base, the top surface of the detection platform matching the bottom surface of the brake pad, with the detection rod positioned above the detection platform. This invention utilizes the weight of the counterweight and detection rod to press the detection rod against the brake pad, and in conjunction with the grating ruler, achieves thickness detection at the detection points of the brake pad, effectively reducing errors caused by varying applied force during detection.

[0004] However, existing technologies still have shortcomings:

[0005] In existing technologies, when it is necessary to detect the thickness of different detection points on brake pads, the brake pads can only be manually removed and then repositioned for detection. This is not convenient to use. Furthermore, when batch testing of brake pads is required, frequent manual removal and repositioning of calibration positions results in low testing efficiency. Moreover, it can only detect a single thickness, which is not practical.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the above-mentioned defects and provide a device for detecting the size of automotive drum brake pads.

[0008] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a device for detecting the size of automotive drum brake pads, comprising:

[0009] A base, wherein a support seat is fixedly connected to the rear side of the upper end of the base, and a top seat is fixedly connected to the upper end of the support seat;

[0010] A rotating base, wherein the rotating base is disposed at the center above the base;

[0011] Placement slots, a plurality of such placement slots are evenly distributed in a circumferential matrix on the side of the rotating seat;

[0012] A lifting seat, which is positioned directly above the rotating seat;

[0013] A lifting mechanism is provided at the upper end of the lifting base;

[0014] An outer arc fitting seat is fixedly connected to the middle of the lower end of the lifting seat;

[0015] A hole position detection mechanism, wherein the hole position detection mechanism is mounted on a lifting base;

[0016] A thickness detection mechanism is provided, which is mounted on a lifting base. The thickness detection mechanism includes a slot in the middle of the front end of the lifting base. A fixing plate is fixedly connected to the rear end of the slot. A digital dial indicator is provided on the front side of the fixing plate.

[0017] As an improvement, the rotating seat is provided with brackets at the front and rear ends, the lower end of the brackets is fixedly connected to the base, and a rotating shaft is rotatably inserted between the front and rear brackets. The rotating seat is fixedly sleeved on the rotating shaft. A stepper motor is fixedly connected to the upper front side of the front bracket, and the rear output shaft of the stepper motor is fixedly connected to the front end of the rotating shaft.

[0018] As an improvement, grooves are provided on both sides of the placement groove, and a drum brake pad is provided in the upper part of the placement groove. The upper end of the drum brake pad has several evenly distributed fixing holes, which are larger at the top and smaller at the bottom.

[0019] As an improvement, the lifting mechanism includes a lifting plate disposed below the top seat. Fixed columns are fixedly connected to the lower end of the lifting plate and the lifting seat on both sides. A cylinder is fixedly connected to the upper end of the top seat. The lower end of the cylinder is fixedly connected to the middle of the upper end of the lifting plate. Sliding columns are fixedly connected to both sides of the upper end of the lifting plate. The upper ends of the sliding columns are slidably inserted into the top seat.

[0020] As an improvement, the hole position detection mechanism includes a second cylinder fixedly connected to the front and rear of one side of the upper end of the lifting seat. A plug is fixedly connected to the bottom of the second cylinder, and the plug is inserted into the fixed hole. An abutment plate is sleeved on the lower end of the second cylinder, and a pressure plate is fixedly connected between the upper ends of the front and rear abutment plates. A touch switch is fixedly inserted into the lower end of the inner side of the outer arc fitting seat, and the lower end of the pressure plate abuts against the upper end of the touch switch.

[0021] As an improvement, a clamping seat is fixedly connected to the upper front side of the fixing plate, the digital dial indicator is inserted into the middle of the clamping seat, and a locking knob is threaded to the front end of one side of the clamping seat.

[0022] As an improvement, the bottom arc surface of the placement groove is fitted with the lower arc surface of the drum brake pad, and the lower arc surface of the outer arc fitting seat is matched with the upper arc surface of the drum brake pad.

[0023] The advantages of this invention compared to the prior art are as follows: In this invention, the stepper motor can drive the rotating shaft to rotate, thereby driving the rotating seat to rotate. The rotation of the rotating seat can drive the drum brake pad to rotate and change different detection points; it can detect the distance between the left and right holes and the distance between the front and rear holes; the upper and lower arc surfaces of the drum brake pad are respectively attached to the placement groove and the outer arc fitting seat; and the thickness detection mechanism can simultaneously and accurately detect the inner and outer arc of the drum brake pad, as well as the hole position and thickness, to ensure that the dimensions of the drum brake pad are qualified, which is convenient for subsequent users to assemble it. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0025] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0026] Figure 3 This is a reference for the usage status of the present invention. Figure 1 .

[0027] Figure 4 This is a front view reference diagram of the usage state of the present invention.

[0028] Figure 5 yes Figure 4 Sectional view at point AA.

[0029] Figure 6 This is a right-side reference diagram showing the usage state of the present invention.

[0030] Figure 7 yes Figure 6 Cross-sectional view at point BB.

[0031] Figure 8 This is a partial structural diagram of the present invention. Figure 1 .

[0032] Figure 9 This is a partial structural diagram of the present invention. Figure 2 .

[0033] Figure 10 This is a partial structural diagram of the present invention. Figure 3 .

[0034] As shown in the figure: 1. Base; 2. Support seat; 3. Top seat; 4. Rotating seat; 5. Bracket; 6. Rotating shaft; 7. Stepper motor; 8. Placement slot; 9. Groove; 10. Drum brake pad; 11. Fixing hole; 12. Lifting seat; 13. Lifting mechanism; 131. Lifting plate; 132. Fixing column; 133. Cylinder 1; 134. Sliding column; 14. Outer arc fitting seat; 15. Hole position detection mechanism; 151. Cylinder 2; 152. Plug; 153. Abutment plate; 154. Pressure plate; 155. Touch switch; 16. Thickness detection mechanism; 161. Groove; 162. Fixing plate; 163. Digital dial indicator; 164. Clamping seat; 165. Locking knob. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings.

[0036] A device for detecting the size of automotive drum brake pads, such as Figure 1 and 5 As shown, the system includes a base 1, a support 2 fixedly connected to the upper rear side of the base 1, and a top seat 3 fixedly connected to the upper end of the support 2. A rotating seat 4 is arranged in the middle of the upper part of the base 1, and brackets 5 are arranged at the front and rear ends of the rotating seat 4. The lower end of the brackets 5 is fixedly connected to the base 1, and a rotating shaft 6 is rotatably inserted between the front and rear brackets 5. The rotating seat 4 is fixedly sleeved on the rotating shaft 6. A stepper motor 7 is fixedly connected to the upper front side of the front bracket 5. The rear output shaft of the stepper motor 7 is fixedly connected to the front end of the rotating shaft 6. The stepper motor 7 can drive the rotating shaft 6 to rotate, thereby driving the rotating seat 4 to rotate.

[0037] like Figure 8 As shown, the rotating seat 4 has several circularly distributed placement slots 8 on its side. The placement slots 8 have grooves 9 on both sides. The upper placement slot 8 has a drum brake pad 10. The upper end of the drum brake pad 10 has several evenly distributed fixing holes 11. The fixing holes 11 are larger at the top and smaller at the bottom. The bottom arc surface of the placement slot 8 fits with the lower arc surface of the drum brake pad 10. The size of the placement slot 8 matches the size of the drum brake pad 10.

[0038] like Figure 1 As shown, a lifting seat 12 is provided directly above the rotating seat 4. A lifting mechanism 13 is provided on the upper end of the lifting seat 12. The lifting mechanism 13 includes a lifting plate 131 provided below the top seat 3. Fixed columns 132 are fixedly connected to the lower end of the lifting plate 131 and the lifting seat 12 on both sides. A cylinder 133 is fixedly connected to the upper end of the top seat 3. The lower end of the cylinder 133 is fixedly connected to the middle of the upper end of the lifting plate 131. Sliding columns 134 are fixedly connected to both sides of the upper end of the lifting plate 131. The upper end of the sliding columns 134 is slidably inserted into the top seat 3. The cylinder 133 can drive the lifting plate 131 and the lifting seat 12 to move up and down as a whole.

[0039] like Figure 1 and 2 As shown, an outer arc fitting seat 14 is fixedly connected to the middle of the lower end of the lifting seat 12. The lower arc surface of the outer arc fitting seat 14 matches the upper arc surface of the drum brake pad 10, and is used to detect the upper arc surface of the drum brake pad 10.

[0040] The lifting seat 12 is provided with a hole position detection mechanism 15. The hole position detection mechanism 15 includes a second cylinder 151 fixedly connected to the front and rear of one side of the upper end of the lifting seat 12. A plug 152 is fixedly connected to the bottom of the second cylinder 151. The plug 152 is inserted into the fixed hole 11. An abutment plate 153 is sleeved on the lower end of the second cylinder 151. A pressure plate 154 is fixedly connected between the upper ends of the front and rear abutment plates 153. A touch switch 155 is fixedly inserted into the lower end of the inner side of the outer arc fitting seat 14. The lower end of the pressure plate 154 abuts against the upper end of the touch switch 155. The front and rear cylinders 151 synchronously drive the front and rear plugs 152 to be inserted into the fixing holes 11. When the front and rear plugs 152 are successfully inserted into the fixing holes 11, the lower end of the abutment plate 153 is attached to the upper side of the drum brake pad 10, and at the same time the lower end of the pressure plate 154 is attached to the upper end of the touch switch 155. The signal receiving end receives the opening signal of the touch switch 155, indicating that the fixing hole 11 on the drum brake pad 10 is in the correct position, and that the upper and lower arc surfaces of the drum brake pad 10 are well attached to the placement groove 8 and the outer arc fitting seat 14, respectively.

[0041] Thickness detection mechanism 16 is mounted on lifting base 12. Thickness detection mechanism 16 includes a slot 161 opened in the middle of the front end of lifting base 12. A fixing plate 162 is fixedly connected to the rear end of the inner side of slot 161. A digital dial indicator 163 is provided on the front side of fixing plate 162. A clamping base 164 is fixedly connected to the upper end of the front side of fixing plate 162. The digital dial indicator 163 is inserted into the middle of clamping base 164. A locking knob 165 is threadedly connected to the front end of one side of clamping base 164. The digital dial indicator 163 is inserted into the middle of clamping base 164, and then the locking knob 165 is tightened to install it.

[0042] Without placing the drum brake pad 10 in the upper placement slot 8, cylinder 133 drives the lifting seat 12 downward to the outer arc fitting seat 14 to fit the upper end of the drum brake pad 10. At this time, the lower end of the digital dial indicator 163 is placed against the bottom of the placement slot 8 and set to zero. Then, cylinder 133 drives the lifting seat 12 upward to place the drum brake pad 10 in the placement slot 8. Cylinder 133 drives the lifting seat 12 downward again. When the lifting seat 12 moves downward, the lower end of the digital dial indicator 163 is placed against the upper end of the drum brake pad 10. The difference between the value of the digital dial indicator 163 at this time and the initial position is the thickness of the drum brake pad 10.

[0043] In specific implementations of this invention, such as Figure 1-10As shown, before use, without placing the drum brake pad 10 in the upper placement slot 8, cylinder 133 drives the lifting seat 12 downward to the height where the outer arc fitting seat 14 can fit the upper end of the drum brake pad 10. At this time, the lower end of the digital display dial indicator 163 is placed against the bottom of the placement slot 8 and set to zero. Then, cylinder 133 drives the lifting seat 12 upward to place the drum brake pad 10 in the placement slot 8. Cylinder 133 drives the lifting seat 12 downward so that the outer arc fitting seat 14 fits against the upper side of the drum brake pad 10. When the lifting seat 12 moves downward, the lower end of the digital display dial indicator 163 touches the upper end of the drum brake pad 10. At this time, the difference between the value of the digital display dial indicator 163 and the initial position is the thickness of the drum brake pad 10.

[0044] When the outer arc fitting seat 14 fits against the upper side of the drum brake pad 10, the front and rear cylinders 151 are started to drive the front and rear plugs 152 to be inserted into the fixing hole 11. When the front and rear plugs 152 are successfully inserted into the fixing hole 11, the lower end of the abutment plate 153 fits against the upper side of the drum brake pad 10, and at the same time the lower end of the pressure plate 154 abuts against the upper end of the touch switch 155. The signal receiving end receives the opening signal of the touch switch 155, indicating that the fixing hole 11 on the drum brake pad 10 is in the correct position, and that the upper and lower arc surfaces of the drum brake pad 10 fit well with the placement groove 8 and the outer arc fitting seat 14 respectively. The hole position of the drum brake pad 10 is accurate.

[0045] After inspecting a pair of fixing holes 11, cylinder 2 151 synchronously drives the front and rear plugs 152 to retract upward from inside the fixing holes 11. Cylinder 1 133 drives the lifting seat 12 to move upward. Then, according to the included angle between the left and right fixing holes 11, the stepper motor 7 is started to drive the rotating shaft 6 to rotate, thereby driving the rotating seat 4 to rotate at the corresponding angle, and stopping at the position of the plug 152 corresponding to the next pair of fixing holes 11 to be inspected.

[0046] Then, cylinder 133 drives the lifting seat 12 to move downwards, and the above detection steps are repeated. The digital dial indicator 163 detects the thickness of the new monitoring point directly below. Then, the front and rear cylinders 151 are started again to drive the front and rear plugs 152 to be inserted into the fixing holes 11. When the front and rear plugs 152 are successfully inserted into the fixing holes 11, the lower end of the pressure plate 154 abuts against the upper end of the touch switch 155 again. The signal receiving end receives the opening signal of the touch switch 155, indicating that the spacing between the left and right holes and the position of the front and rear holes are accurate. Otherwise, it means that the size of the drum brake pad 10 is unqualified and the spacing between the holes is incorrect. This will cause the user to be unable to accurately fix it to the brake shoe when assembling it later. This application can accurately detect the inner and outer curvature, hole position and thickness of the drum brake pad 10 simultaneously to ensure that the size of the drum brake pad 10 is qualified and facilitates the user's assembly later.

[0047] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer for control. The detailed description of known functions and components is omitted in the specific implementation of this disclosure. To ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0048] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for detecting the size of automotive drum brake pads, characterized in that, include: A base (1) is fixedly connected to a support seat (2) at the rear of its upper end, and a top seat (3) is fixedly connected to the upper end of the support seat (2). Rotating seat (4), the rotating seat (4) is disposed above the center of the base (1); Placement slots (8), a plurality of the placement slots (8) are evenly distributed in a circular matrix on the side of the rotating seat (4); A lifting seat (12) is located directly above the rotating seat (4); A lifting mechanism (13) is provided on the upper end of the lifting seat (12); Outer arc fitting seat (14), the outer arc fitting seat (14) is fixedly connected to the middle of the lower end of the lifting seat (12); Hole position detection mechanism (15), wherein the hole position detection mechanism (15) is mounted on the lifting seat (12); Thickness detection mechanism (16) is provided on lifting seat (12). The thickness detection mechanism (16) includes a slot (161) opened in the middle of the front end of the lifting seat (12). A fixing plate (162) is fixedly connected to the rear end of the inner side of the slot (161). A digital display dial indicator (163) is provided on the front side of the fixing plate (162).

2. The automotive drum brake pad size detection device according to claim 1, characterized in that: The rotating seat (4) is provided with brackets (5) at the front and rear ends. The lower end of the brackets (5) is fixedly connected to the base (1). A rotating shaft (6) is rotatably inserted between the front and rear brackets (5). The rotating seat (4) is fixedly sleeved on the rotating shaft (6). A stepper motor (7) is fixedly connected to the upper front side of the front bracket (5). The rear output shaft of the stepper motor (7) is fixedly connected to the front end of the rotating shaft (6).

3. The automotive drum brake pad size detection device according to claim 1, characterized in that: The placement groove (8) has grooves (9) on both sides and front and back. A drum brake pad (10) is provided in the upper part of the placement groove (8). The upper end of the drum brake pad (10) has several evenly distributed fixing holes (11) on the front and back. The fixing holes (11) are larger at the top and smaller at the bottom.

4. The automotive drum brake pad size detection device according to claim 1, characterized in that: The lifting mechanism (13) includes a lifting plate (131) disposed below the top seat (3). The lower end of the lifting plate (131) and the lifting seat (12) are fixedly connected to the front and rear sides of the lifting plate (132). The upper end of the top seat (3) is fixedly connected to a cylinder (133). The lower end of the cylinder (133) is fixedly connected to the middle of the upper end of the lifting plate (131). The upper ends of the lifting plate (131) are fixedly connected to sliding columns (134). The upper ends of the sliding columns (134) are slidably inserted into the top seat (3).

5. The automotive drum brake pad size detection device according to claim 3, characterized in that: The hole position detection mechanism (15) includes a second cylinder (151) fixedly connected to the front and rear of one side of the upper end of the lifting seat (12). A plug (152) is fixedly connected to the bottom of the second cylinder (151). The plug (152) is inserted into the fixed hole (11). An abutment plate (153) is sleeved on the lower end of the second cylinder (151). A pressure plate (154) is fixedly connected between the upper ends of the front and rear abutment plates (153). A touch switch (155) is fixedly inserted into the lower end of the inner side of the outer arc fitting seat (14). The lower end of the pressure plate (154) abuts against the upper end of the touch switch (155).

6. The automotive drum brake pad size detection device according to claim 1, characterized in that: A clamping seat (164) is fixedly connected to the upper front side of the fixing plate (162), and the digital dial indicator (163) is inserted into the middle of the clamping seat (164). A locking knob (165) is threadedly connected to the front end of one side of the clamping seat (164).

7. The automotive drum brake pad size detection device according to claim 3, characterized in that: The bottom arc surface of the placement groove (8) is in contact with the lower arc surface of the drum brake pad (10), and the lower arc surface of the outer arc fitting seat (14) matches the upper arc surface of the drum brake pad (10).

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