Automatic detection and assembly device for torque of automobile exhaust valve spring

Abstract

The invention discloses an automatic detection and assembly device for torque of automobile exhaust pipe valve spring, which comprises a frame, on which a driving motor is connected; a fixing mechanism, which is arranged at the bottom of the frame; a spring cover fixing seat, which is connected to the lower end of the driving motor shaft; a bayonet is arranged on the spring cover fixing seat, and a working space is arranged above the bayonet; a clamping mechanism, which is connected to the spring cover fixing seat, and the clamping mechanism has a pressing block arranged in the working space, and the pressing block is used to press downward the spring cover and the spring assembled on the fixing column above the bayonet; a torque sensor; and a control box, which is electrically connected to the driving motor, the clamping mechanism and the torque sensor. The automatic detection and assembly device for torque of automobile exhaust pipe valve spring can detect the torque of the spring during the spring assembly process, so that the force value of the valve opening is guaranteed, the qualified rate of the valve finished product is improved, and the assembly efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, in particular to an automatic detection and assembly device for torsion of an automobile exhaust pipe valve spring. Background Art

[0002] The automobile exhaust pipe is a part of the engine exhaust system. The exhaust system mainly includes the exhaust manifold, exhaust pipe, exhaust pipe valve and muffler. Generally, the three-stage catalytic converter for controlling engine pollutant emissions is also installed in the exhaust system. The exhaust pipe valve is an indispensable auxiliary component in the exhaust pipe system. It is widely used in the highest point or elbow or airtight place on the pipeline to discharge the gas in the pipe to clear the pipeline. It can effectively achieve the pressure in the valve exhaust pipe to always maintain within the range of technical requirements, so as to achieve the purpose of normal exhaust work; it is beneficial to improve the engine working efficiency, reduce fuel consumption, environmental pollution and noise, and play a role in energy conservation and emission reduction.

[0003] The prior art automobile exhaust pipe valve, such as the patent application with publication number CN207829979U and titled "Exhaust pipe valve structure", has a structure including a mounting seat installed at the air inlet or outlet of the exhaust cold end silencer of the automobile exhaust pipe, the mounting seat is provided with an opening, and a valve core capable of closing or opening the opening is rotatably connected to the mounting seat, and a spring capable of automatically resetting the valve core is provided on the rotating shaft of the valve core. When the engine is running at a low speed, the valve is in a closed state as a whole, and the exhaust gas is discharged from the orifice tube or the drain pipe. At this time, the pressure is low, and the valve core of the valve is in a closed pressure-maintaining state under the elastic force of the spring; when the engine is running at a high speed, the pressure on one side of the valve core increases, so that the valve core overcomes the elastic force of the spring and opens, and the exhaust gas is discharged from the valve and the orifice tube or the drain pipe. At this time, the pressure is relatively high, and the valve plays a pressure relief role; the valve can keep the pressure in the exhaust pipe in one state; when the exhaust pressure decreases, the elastic force of the torsion spring drives the valve core to rotate to close the valve. Therefore, the setting of the spring plays a vital role in whether the valve can work normally. If the torque of the spring is set too small, the valve core will be easily opened, causing the pressure in the exhaust pipe of the car to be lower than the set pressure value, and the car will make a lot of noise when driving at a low speed; if the torque of the spring is set too large, the valve core will be difficult to open, causing the pressure in the exhaust pipe of the car to be much higher than the set pressure value, and the exhaust pipe will not be smooth, which will affect the service life and working efficiency of the engine.

[0004] At present, the torque detection of the automobile exhaust valve spring generally uses a fully automatic torsion spring tester to detect the relationship between the rotation angle and torque when the spring is assembled, so that when the spring is assembled on the valve, the test result value is used to determine the required assembly angle. Although this method is feasible, due to the difference in the rigidity of each spring, each spring needs to be tested before assembly, and there are also assembly errors in the spring assembly process, so the force value of the valve assembly cannot be guaranteed, and the overall process is more, the efficiency is low, and the qualified rate of the finished valve is low. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art and provide an automobile exhaust pipe valve spring torque automatic detection and assembly device which can detect the torsion of the spring during the spring assembly process, ensure the force value of valve opening, improve the qualified rate of valve finished products and have high assembly efficiency.

[0006] The technical solution of the present invention is to provide an automatic detection and assembly device for the torque of an automobile exhaust valve spring having the following structure:

[0007] A frame, wherein a driving motor is connected to the frame;

[0008] A fixing mechanism, arranged at the bottom of the frame, for fixing the valve assembly to be tested;

[0009] The spring cover fixing seat is connected to the lower end of the driving motor shaft and rotates synchronously with the driving motor shaft; the spring cover fixing seat is provided with a bayonet for the upper end of the fixing column on which the spring is installed on the valve assembly to pass through, and a working space is provided above the bayonet for the spring cover to be assembled on the upper end of the fixing column and for the spring cover to be connected to the upper end of the spring;

[0010] A clamping mechanism is connected to the spring cover fixing seat, and the clamping mechanism has a clamping block arranged in the working space, and the clamping block is used to press down the spring cover and the spring assembled on the fixing column above the bayonet, and is used to make the spring cover and the upper end of the spring rotate synchronously when the spring cover fixing seat rotates;

[0011] A torque sensor is used to detect the torque of the spring when the drive motor shaft rotates;

[0012] The control box is electrically connected to the drive motor, the clamping mechanism and the torque sensor, and is used to receive the spring torque signal transmitted by the torque sensor and control the action of the drive motor.

[0013] Preferably, both sides of the upper end of the bayonet are provided with limiting steps for supporting the lower end of the spring cover when the pressing block presses the spring cover downward.

[0014] Preferably, the clamping mechanism comprises a vertically arranged clamping cylinder and a slider slidably fitted on a spring cover fixing seat, the lower end of the piston rod of the clamping cylinder is connected to the slider, and the pressure block is connected to the slider and moves synchronously with the slider.

[0015] Preferably, the pressure block is provided with a crimping portion that matches and presses the upper end surface of the bayonet, and the crimping portion has a notch that matches the width of the bayonet, the notch allows the upper end of the spring cover to be exposed, and two pressing inclined surfaces or arc surfaces are provided on both sides of the bottom of the notch that can press the spring cover downward.

[0016] Preferably, the two clamping arc surfaces are symmetrically arranged and the distance between the upper ends is smaller than the distance between the lower ends.

[0017] Preferably, the spring cover fixing seat is provided with a first inclined surface extending into the working space and inclined from top to bottom on one side close to the working space; the outer wall of the pressure block is provided with a second inclined surface matching and fitting with the first inclined surface, and when the pressure block moves downward until the second inclined surface fits with the first inclined surface, a gap is provided between the bottom of the crimping portion and the upper end of the bayonet of the spring cover fixing seat, and the crimping portion presses the spring cover at the upper end of the fixing column.

[0018] Preferably, the fixing mechanism comprises a positioning seat, a support block and a fixed cylinder connected to the bottom of the frame, the positioning seat is provided with a positioning groove for placing the valve assembly to be inspected, the support block is rotatably connected to a locking rod, the free end of the piston rod of the fixed cylinder is hinged to the first end of the locking rod, and the second end of the locking rod extends toward the positioning groove, and when the piston rod of the fixed cylinder pushes the locking rod outward to rotate, the second end of the locking rod can press the valve assembly to be inspected placed in the positioning groove.

[0019] Preferably, the torque sensor is connected to the frame and to the rotating shaft of the driving motor.

[0020] Preferably, a transmission light rod coaxial with the rotating shaft of the driving motor is rotatably connected to the frame, the upper end of the transmission light rod is connected to the rotating shaft of the driving motor through a coupling and a reducer, and the lower end of the transmission light rod is connected to the spring cover fixing seat.

[0021] After adopting the above structure, the automatic detection and assembly device for torsion of automobile exhaust pipe valve spring of the present invention has the following advantages compared with the prior art: when using the automatic detection and assembly device for torsion of automobile exhaust pipe valve spring, the valve assembly to be detected is first placed in the positioning groove of the positioning seat at the bottom of the frame, and then the fixed cylinder of the fixing mechanism drives the locking rod to rotate, so that the locking rod presses the valve assembly to be detected, at this time, the upper end of the fixing column with the spring installed on the valve assembly passes through the bayonet of the spring cover fixing seat, and the staff pre-assembles the spring cover on the upper end of the fixing column in the working space above the bayonet, and makes the spring cover and the upper end of the spring The clamping foot of the spring cover and the spring are clamped; then the clamping block of the clamping mechanism presses the spring cover and the spring downward; the driving motor runs, driving the spring cover fixing seat and the clamping mechanism to rotate, so that the spring cover and the clamping foot at the upper end of the spring rotate together, and the torque sensor detects the torque applied by the spring on the driving motor shaft in real time, and transmits the torque change signal to the control box, which controls the driving motor to run or stop running; when the control box detects that the torque of the spring is within the set range, the driving motor is controlled to stop running. At this time, the staff uses a welding gun to weld the spring cover and the upper end of the fixing column, thereby completing the automatic detection and assembly of the torque of the automobile exhaust pipe valve spring. The automobile exhaust pipe valve spring torque automatic detection and assembly device can detect the torque of the spring during the spring assembly process, and adjust the torque of the spring to a predetermined range, and then complete the assembly of the spring. The force value of the valve assembly opening is guaranteed, the qualified rate of the valve finished product is improved, and the assembly efficiency is greatly improved. Secondly, the setting of the limiting steps on both sides of the upper end of the bayonet can not only prevent the spring from being crushed or deformed, but also play a limiting role in the installation position of the spring cover, and can also ensure the synchronous rotation of the spring cover and the spring cover fixing seat, so that the torque detection of the spring is more accurate; In addition, the setting of the notch of the crimping part on the pressure block and the pressing inclined surface or arc surface at the bottom of the notch makes the spring cover more firmly pressed, avoiding displacement or offset during the rotation of the spring cover, and ensuring the qualified rate of the finished product of the product. Furthermore, the matching setting of the first inclined surface on the spring cover fixing seat and the second inclined surface on the outer wall of the pressure block makes the pressure block move downward to the second inclined surface and the first inclined surface fit together, and there is a gap between the bottom of the crimping part and the upper end of the bayonet of the spring cover fixing seat. At this time, the crimping part presses the spring cover at the upper end of the fixing column, that is, the setting of the gap, further ensures that the spring is not crushed or deformed during the pressing process of the pressure block, and makes the spring cover pressed more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The invention is a schematic structural diagram of an automatic detection and assembly device for torsion of an automobile exhaust pipe valve spring.

[0023] Figure 2 It is a structural schematic diagram from another angle of the automatic detection and assembly device for torsion of an automobile exhaust valve spring of the present invention.

[0024] Figure 3 The invention is a schematic structural diagram of a spring cover fixing seat of an automatic detection and assembly device for spring torque of an automobile exhaust pipe valve.

[0025] Figure 4 The invention is a schematic structural diagram of a fixing mechanism of an automatic detection and assembly device for a spring torsion force of an automobile exhaust pipe valve.

[0026] As shown in the figure:

[0027] 1. Frame, 100. Support frame, 101. Base, 2. Driving motor, 200. Reducer, 201. Coupling, 202. Transmission light rod, 3. Spring cover fixing seat, 300. Bayonet, 301. Limiting step, 302. Guide hole, 303. Working space, 304. First inclined plane, 4. Clamping cylinder, 400. Pressing block, 401. Slider, 402. Notch, 403. Clamping arc surface, 404. Second inclined plane, 405. Gap, 406. Crimping part, 5. Fixing mechanism, 500. Positioning seat, 501. Support block, 502. Locking rod, 503. Fixed cylinder, 504. Positioning groove, 6. Torque sensor, 7. Valve assembly, 700. Spring, 701. Spring cover. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] See also Figure 1 to Figure 4 As shown;

[0030] The present invention discloses an automatic detection and assembly device for torsion of an automobile exhaust pipe valve spring, which is used to detect the torsion of the spring during the assembly process of the valve core spring of the automobile exhaust pipe valve, and adjust the spring torsion to a set torsion range to ensure the force value of the valve opening and improve the qualified rate of the valve finished product. The automatic detection and assembly device for torsion of an automobile exhaust pipe valve spring comprises a frame 1, on which a driving motor 2 is connected; a reducer 200 is connected to the output end of the rotating shaft of the driving motor 2, and a transmission light rod 202 coaxial with the rotating shaft of the driving motor 2 is provided below the reducer 200, the upper end of the transmission light rod 202 is connected to the reducer 200 below the rotating shaft of the driving motor 2 through a coupling 201, and the lower end of the transmission light rod 202 is connected to a spring cover fixing seat 3, and the transmission light rod 202 is rotatably connected to a support frame 100 located on the frame 1. When the driving motor 2 is in motion, the spring cover fixing seat 3 can be driven to rotate. The automobile exhaust valve spring torque automatic detection and assembly device also includes a torque sensor 6 for detecting the torque of the spring when the shaft of the drive motor 2 rotates. The torque sensor 6 is connected to the frame 1 and to the shaft of the drive motor 2. The control box is electrically connected to the drive motor 2, the clamping mechanism and the torque sensor 6, and is used to receive the spring torque signal transmitted by the torque sensor 6 and control the action of the drive motor 2. The control box is also called a controller or a computer, which can receive the spring torque signal transmitted by the torque sensor and display the torque change curve of the spring and control the rotation of the shaft of the drive motor in real time.

[0031] A base 101 is provided at the bottom of the frame 1, and a fixing mechanism 5 is connected to the base 101, which is arranged at the bottom of the frame 1, and the fixing mechanism 5 is used to fix the valve assembly 7 to be detected; the fixing mechanism 5 includes a positioning seat 500, a support block 501 and a fixed cylinder 503 connected to the bottom of the frame 1, and the positioning seat 500 is provided with a positioning groove 504 for placing the valve assembly 7 to be detected, and a locking rod 502 is rotatably connected to the support block 501, and the free end of the piston rod of the fixed cylinder 503 is hinged to the first end of the locking rod 502, and the second end of the locking rod 502 extends toward the positioning groove 504. When the piston rod of the fixed cylinder 503 pushes the locking rod 502 outward to rotate, the second end of the locking rod 502 can press the valve assembly 7 to be detected placed in the positioning groove 504.

[0032] The automobile exhaust valve spring torque automatic detection and assembly device also includes a spring cover fixing seat 3, which is connected to the lower end of the driving motor 2 shaft and rotates synchronously with the driving motor 2 shaft; the spring cover fixing seat 3 is provided with a bayonet 300 for the upper end of the fixing column on which the spring 700 is installed on the valve assembly 7 to pass through, and a working space 303 is provided above the bayonet 300 so that the spring cover 701 can be assembled on the upper end of the fixing column and the spring cover 701 is connected to the upper end of the spring 700; a clamping mechanism is connected to the spring cover fixing seat 3, and the clamping mechanism has a pressing block 400 arranged in the working space 303, and the pressing block 400 is used to press downward the spring cover 701 and the spring 700 assembled on the fixing column above the bayonet 300, and is used to make the spring cover 701 and the upper end of the spring 700 rotate synchronously when the spring cover fixing seat 3 rotates. When the automobile exhaust valve spring torque automatic detection and assembly device is used, the valve assembly 7 to be detected is first placed in the positioning groove 504 of the positioning seat 500 at the bottom of the frame 1, and then the fixing cylinder 503 of the fixing mechanism 5 drives the locking rod 502 to rotate, so that the locking rod 502 presses the valve assembly 7 to be detected. At this time, the upper end of the fixing column on which the spring 700 is installed on the valve assembly 7 passes through the bayonet 300 of the spring cover fixing seat 3, and the staff pre-assembles the spring cover 701 on the upper end of the fixing column in the working space 303 above the bayonet 300, and the spring cover 701 is engaged with the clamping foot at the upper end of the spring 700; then the pressing block of the clamping mechanism 400 presses the spring cover 701 and the spring 700 downward; the control box controls the driving motor 2 to operate, drives the spring cover fixing seat 3 and the pressing mechanism to rotate, so that the spring cover 701 drives the clamping foot at the upper end of the spring 700 to rotate together, and the torque sensor 6 detects the torque applied by the spring on the driving motor shaft in real time, and transmits the torque change signal to the control box, and the control box controls the driving motor to operate or stop; when the control box detects that the torque of the spring is within the set range, the driving motor is controlled to stop running. At this time, the staff welds the spring cover with the upper end of the fixing column with a welding gun, thereby completing the automatic detection and assembly of the torque of the automobile exhaust pipe valve spring. The automobile exhaust pipe valve spring torque automatic detection and assembly device can detect the torque of the spring during the spring assembly process, and adjust the torque of the spring to a predetermined range, and then complete the assembly of the spring, and the force value of the valve assembly opening is guaranteed, the qualified rate of the valve finished product is improved, and the assembly efficiency is greatly improved.

[0033] See again Figure 2 and Figure 3As shown, as an embodiment of the present invention, both sides of the upper end of the bayonet 300 are provided with limiting steps 301 for supporting the lower end of the spring cover 701 when the pressing block 400 presses the spring cover 701 downward. The setting of the limiting steps 301 on both sides of the upper end of the bayonet 300 can not only prevent the spring 700 from being crushed or deformed, but also limit the installation position of the spring cover 701, and can also ensure the synchronous rotation of the spring cover and the spring cover fixing seat, so that the torque detection of the spring is more accurate.

[0034] See again Figure 1 to Figure 3 As shown, as an embodiment of the present invention, the clamping mechanism comprises a vertically arranged clamping cylinder 4 and a slider 401 slidably fitted on a spring cover fixing seat 3, the spring cover fixing seat 3 is provided with a guide hole 302 extending along the moving direction of the piston rod of the clamping cylinder 4, and the slider 401 slidably fits in the guide hole 302; the lower end of the piston rod of the clamping cylinder 4 is connected to the slider 401, and the pressing block 400 is connected to the slider 401 and moves synchronously with the slider 401. The pressing block 400 is provided with a crimping portion 406 that matches and presses the upper end surface of the bayonet 300, and the crimping portion 406 has a notch 402 that matches the width of the bayonet 300, and the notch 402 allows the upper end of the spring cover 701 to be exposed, and two sides of the bottom of the notch 402 are provided with two pressing inclined surfaces or pressing arc surfaces 403 that can press the spring cover 701 downward. The two pressing inclined surfaces are symmetrically arranged and the distance between the upper ends is smaller than the distance between the lower ends, or the two pressing arc surfaces 403 are symmetrically arranged and the distance between the upper ends is smaller than the distance between the lower ends. The notch 402 of the crimping portion 406 on the pressing block 400 and the setting of the pressing inclined surface or the pressing arc surface 403 at the bottom of the notch 402 make the spring cover more firmly pressed, avoid displacement or offset during the rotation of the spring cover, and ensure the qualified rate of the finished product.

[0035] See again Figure 3As shown, as an embodiment of the present invention, the spring cover fixing seat 3 is provided with a first inclined surface 304 extending into the working space 303 and tilted from top to bottom on one side close to the working space 303; the outer wall of the pressing block 400 is provided with a second inclined surface 404 matching and fitting with the first inclined surface 304, and when the pressing block 400 moves downward until the second inclined surface 404 fits with the first inclined surface 304, a gap 405 is provided between the bottom of the crimping portion 406 and the upper end of the bayonet 300 of the spring cover fixing seat 3, and the crimping portion 406 presses the spring cover 701 at the upper end of the fixing column. The matching arrangement of the first inclined surface 304 on the spring cover fixing seat 3 and the second inclined surface 404 on the outer wall of the pressing block 400 enables that when the pressing block 400 moves downward until the second inclined surface 404 is in contact with the first inclined surface 304, there is a gap 405 between the bottom of the crimping portion 406 and the upper end of the bayonet 300 of the spring cover fixing seat 3. That is, the arrangement of the gap 405 further ensures that the spring is not crushed or deformed during the downward pressing of the pressing block 400, and the spring cover is compressed more stably.

[0036] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An automatic detection and assembly device for torsion of automobile exhaust valve spring, characterized in that: It includes A frame, wherein a driving motor is connected to the frame; A fixing mechanism, arranged at the bottom of the frame, for fixing the valve assembly to be tested; The spring cover fixing seat is connected to the lower end of the driving motor shaft and rotates synchronously with the driving motor shaft; the spring cover fixing seat is provided with a bayonet for the upper end of the fixing column on which the spring is installed on the valve assembly to pass through, and a working space is provided above the bayonet for the spring cover to be assembled on the upper end of the fixing column and for the spring cover to be connected to the upper end of the spring; A clamping mechanism is connected to the spring cover fixing seat, and the clamping mechanism has a clamping block arranged in the working space, and the clamping block is used to press downward the spring cover and the spring assembled on the fixing column above the bayonet, and is used to make the spring cover and the upper end of the spring rotate synchronously when the spring cover fixing seat rotates; the clamping mechanism includes a vertically arranged clamping cylinder and a slider slidably fitted on the spring cover fixing seat, the lower end of the piston rod of the clamping cylinder is connected to the slider, and the clamping block is connected to the slider and moves synchronously with the slider; both sides of the upper end of the bayonet are provided with limiting steps for supporting the lower end of the spring cover when the clamping block presses the spring cover downward; A torque sensor is used to detect the torque of the spring when the drive motor shaft rotates; The control box is electrically connected to the drive motor, the clamping mechanism and the torque sensor, and is used to receive the spring torque signal transmitted by the torque sensor and control the action of the drive motor.

2. The automatic detection and assembly device for the torsion of the automobile exhaust valve spring according to claim 1 is characterized in that: The pressing block is provided with a crimping portion that matches and presses the upper end surface of the bayonet. The crimping portion has a notch that matches the width of the bayonet. The notch allows the upper end of the spring cover to be exposed, and two compression arc surfaces that can press the spring cover downward are provided on both sides of the bottom of the notch.

3. The automatic detection and assembly device for torsion of automobile exhaust valve spring according to claim 2 is characterized in that: The two pressing arc surfaces are symmetrically arranged and the distance between the upper ends is smaller than the distance between the lower ends.

4. The automatic detection and assembly device for the torsion of the automobile exhaust valve spring according to claim 2 is characterized in that: A first inclined surface extending into the working space and tilted from top to bottom is provided on the side of the spring cover fixing seat close to the working space; a second inclined surface matching and fitting with the first inclined surface is provided on the outer wall of the pressing block, and when the pressing block moves downward until the second inclined surface fits with the first inclined surface, a gap is provided between the bottom of the crimping portion and the upper end of the bayonet of the spring cover fixing seat, and the crimping portion presses the spring cover at the upper end of the fixing column.

5. The automatic detection and assembly device for torsion of automobile exhaust valve spring according to claim 1, characterized in that: The fixing mechanism includes a positioning seat, a support block and a fixed cylinder connected to the bottom of the frame. The positioning seat is provided with a positioning groove for placing the valve assembly to be tested. The support block is rotatably connected to a locking rod. The free end of the piston rod of the fixed cylinder is hinged to the first end of the locking rod, and the second end of the locking rod extends toward the positioning groove. When the piston rod of the fixed cylinder pushes the locking rod outward to rotate, the second end of the locking rod can press the valve assembly to be tested placed in the positioning groove.

6. The automatic detection and assembly device for torsion of automobile exhaust valve spring according to claim 1, characterized in that: The torque sensor is connected to the frame and to the rotating shaft of the driving motor.

7. The automatic detection and assembly device for the torsion of the automobile exhaust valve spring according to claim 1, characterized in that: The frame is rotatably connected with a transmission light rod coaxial with the rotating shaft of the driving motor. The upper end of the transmission light rod is connected to the rotating shaft of the driving motor through a coupling and a reducer, and the lower end of the transmission light rod is connected to the spring cover fixing seat.

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