Test device for automotive vehicle lamps

Abstract

The utility model discloses a testing arrangement for car light, including box body and opening test chamber in its front, the box body front rotatoryly connected with the door, the box body bottom fixedly connected with the water tank, the test chamber inner wall rear side rotatoryly established fan, the test chamber inside upper portion is equipped with the circular spray disc, the test chamber inside left and right sides all are equipped with the spray pipe of vertical setting, spray disc bottom and two spray pipe each other close one side between fixedly connected with the equidistance setting of multiple spray heads. This device has the advantages of flexible adjustment, wide application range, through introducing electric push rod and sliding connection structure, effectively solved the limitation of traditional fixed type spray structure, realized the flexible adjustment of spray pipe and spray head position, improved the adaptability, accuracy and operation convenience of testing arrangement.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive headlight testing devices, specifically a testing device for automotive headlights. Background Technology

[0002] Automotive lighting testing equipment is an important device used to test whether the performance of various lights such as headlights, taillights, and turn signals of a vehicle meets safety standards. With the development of technology, automotive lighting testing equipment has become increasingly sophisticated and automated.

[0003] Existing testing devices can be referenced from Chinese Utility Model Patent Publication No. CN222461001U, which discloses a testing device for automotive headlight anti-fogging performance. The device includes a housing with a testing chamber on the front. A door is rotatably connected to the front of the housing. A water tank is fixedly connected to the bottom of the housing, and a water pump is fixedly connected to the top. A suction pipe is fixedly connected to the inlet of the water pump, and an outlet pipe is fixedly connected to the outlet of the water pump. Through the configured water pump, screen, fan, spray pipe, and spray head, starting the water pump draws water through the suction pipe, which then enters the spray pipe through the outlet pipe. The spray head sprays water, and the fan causes the blades to rotate at high speed, creating a strong airflow in the mist. This simulates the scenario of a car headlight following a vehicle at high speed, allowing the device to test the anti-fogging performance of the headlights when facing high-speed airflow, thus expanding the testing range of the device.

[0004] The above-mentioned device has good performance, but it still has some defects in actual use: the spray pipe is fixedly installed on the inner wall of the chamber, making it inconvenient to adjust the distance between the spray pipe and the spray head and the headlight according to different test requirements; because the spray pipe is fixedly installed, the position of the spray head cannot be adjusted according to different headlight sizes or shapes, which limits the applicability of the test device. Different headlight models may require different spray distances to achieve the best test results, and the fixed spray pipe is difficult to meet this requirement. Utility Model Content

[0005] The purpose of this invention is to provide a testing device for automotive headlights, which has the advantages of flexible adjustment and wide applicability. By introducing an electric push rod and a sliding connection structure, the limitations of the traditional fixed spray structure are effectively solved, and the positions of the spray pipe and spray head are flexibly adjusted, thereby improving the adaptability, accuracy and ease of operation of the testing device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a testing device for automotive headlights, comprising a housing and a testing chamber formed on its front side, a door rotatably connected to the front side of the housing, a water tank fixedly connected to the bottom of the housing, and a fan rotatably mounted on the rear side of the inner wall of the testing chamber.

[0007] The test chamber is equipped with a circular spray disc at the top. Vertically arranged spray pipes are provided on both the left and right sides of the test chamber. Multiple spray heads are fixedly connected at equal intervals between the bottom of the spray disc and the two spray pipes on the side closest to each other. An electric push rod is fixedly connected to the center of the top of the box. The telescopic end of the bottom of the electric push rod is fixedly connected to the top of the spray disc. An L-shaped connecting rod is fixedly connected to the center of the side of the two spray pipes that are far apart from each other. The ends of the two L-shaped connecting rods that are far away from the spray pipes extend to the left and right sides of the outside of the box and are slidably connected to them.

[0008] As a preferred embodiment of the testing device for automotive headlights of this utility model, a handle is fixedly connected to the right side of the front of the door, a heater body is fixedly connected inside the water tank, a temperature sensor is fixedly connected to the top of one side of the inner wall of the water tank, and a controller is fixedly connected to the right end of the front of the water tank.

[0009] As a preferred embodiment of the testing device for automotive headlights of this utility model, horizontal sealing rings are fixedly connected to both the left and right sides of the housing, and the inner wall of the sealing rings is slidably connected to the surface of the L-shaped connecting rod. A first corrugated pipe is fixedly connected to the rear top of the spray disc, and a second corrugated pipe is fixedly connected to the top of each of the two spray pipes.

[0010] As a preferred embodiment of the testing device for automotive headlights of this utility model, a horizontally arranged diverter pipe is fixedly connected to the rear side of the top of the housing. The first corrugated pipe extends from the end away from the spray disc to the upper part of the housing and is fixedly connected to the center of the front surface of the diverter pipe. The two second corrugated pipes extend from the end away from the spray pipe to the upper part of the housing and are fixedly connected to the left and right ends of the front side of the diverter pipe.

[0011] As a preferred embodiment of the testing device for automotive headlights of this utility model, a horizontally arranged rectangular shell is fixedly connected to the rear side of the outer wall of the housing. A horizontally arranged movable groove is provided on both the left and right sides of the front of the rectangular shell. The L-shaped connecting rod extends into the interior of the rectangular shell at the end away from the spray pipe and is slidably connected to the inner wall of the movable groove. A water pump is fixedly connected to the rear side of the outer wall of the rectangular shell.

[0012] As a preferred embodiment of the testing device for automotive headlights of this utility model, the water pump's pumping end is fixedly connected to a pumping pipe, the end of the pumping pipe away from the water pump is fixedly connected to the bottom rear side of the water tank, the water pump's outlet end is fixedly connected to a water supply pipe, the end of the water supply pipe away from the water pump is fixedly connected to the center rear side of the diverter pipe, and a horizontally arranged bidirectional threaded rod is rotatably connected inside the rectangular shell.

[0013] As a preferred embodiment of the testing device for automotive headlights of this utility model, the bidirectional threaded rod is threaded to movable blocks on both the left and right sides of the inner surface of the rectangular shell. The front side of the movable block is fixedly connected to the end of the L-shaped connecting rod away from the spray pipe. Guide rods are fixedly connected between the left and right sides of the inner wall of the rectangular shell, and the two movable blocks are slidably connected to the guide rods.

[0014] As a preferred embodiment of the testing device for automotive headlights of this utility model, the bidirectional threaded rod is arranged parallel to the guide rod, one end of the bidirectional threaded rod is rotatably connected to one side of the inner wall of the rectangular shell, and the other end of the bidirectional threaded rod extends to one side of the outer wall of the rectangular shell and is fixedly connected to the output end of a power motor, and the power motor is fixedly installed on one side of the outer wall of the rectangular shell.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model involves installing the vehicle headlight under test inside the test chamber, closing the chamber door, starting the heater body with the controller, and having the temperature sensor monitor the water temperature in the tank in real time. Once the water temperature reaches the test requirements, the power motor is started, driving the bidirectional threaded rod to rotate, which in turn moves two moving blocks laterally along the guide rod, thereby adjusting the position of the L-shaped connecting rod. This further drives the spray pipe to move left and right, while the electric push rod controls the vertical displacement of the spray disc to precisely adjust the distance between the spray head and the vehicle headlight. The sealing ring ensures that the sealing of the chamber is not affected during the sliding of the L-shaped connecting rod.

[0017] 2. This utility model uses a controller to activate the water pump, which draws heated water from the water tank through a suction pipe. The water is then transported through a water supply pipe to a top distribution pipe, which evenly distributes the water flow to the first corrugated pipe and two second corrugated pipes. The water entering the first corrugated pipe is transported to the inside of the spray disc and eventually reaches multiple spray nozzles. The water entering the two second corrugated pipes is transported to the inside of the spray pipe and eventually reaches multiple side spray nozzles. All spray nozzles begin to spray mist-like water vapor into the test chamber, covering the surface of the headlight. The fan starts, generating a high-speed airflow to simulate the wind speed conditions faced by the headlight when the vehicle is driving at high speed in rainy or high-humidity environments. The mist impacts the headlight surface under the action of the high-speed airflow, simulating the anti-fogging challenge in real use. The surrounding layout of the spray disc, spray pipe, and spray nozzles allows the mist to contact the headlight glass surface from all directions, enhancing the realism of the test. Attached Figure Description

[0018] Figure 1 This is a three-dimensional drawing of the present invention;

[0019] Figure 2 This is a rear view of the present invention;

[0020] Figure 3This is a schematic diagram of the structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the rectangular shell structure of this utility model.

[0022] In the diagram: 1. Box body; 2. Test chamber; 3. Box door; 301. Handle; 4. Water tank; 5. Heater body; 6. Temperature sensor; 7. Controller; 8. Water pump; 9. Pumping pipe; 10. Water supply pipe; 14. Fan; 22. Spray disc; 23. Spray pipe; 24. Spray head; 25. L-shaped connecting rod; 26. Sealing ring; 27. Rectangular shell; 270. Moving groove; 28. Moving block; 29. ​​Bidirectional threaded rod; 30. Power motor; 31. Guide rod; 32. Diverter pipe; 33. No. 1 corrugated pipe; 34. No. 2 corrugated pipe; 35. Electric push rod. Detailed Implementation

[0023] Please see Figures 1-4 A testing device for automotive headlights includes a housing 1 and a testing chamber 2 located on its front. A door 3 is rotatably connected to the front of the housing 1, and a water tank 4 is fixedly connected to the bottom of the housing 1. A fan 14 is rotatably mounted on the rear side of the inner wall of the testing chamber 2.

[0024] Furthermore, a circular spray disc 22 is provided above the interior of the test chamber 2, and vertically arranged spray pipes 23 are provided on both the left and right sides of the interior of the test chamber 2. Multiple spray heads 24 are fixedly connected at equal intervals between the bottom of the spray disc 22 and the two spray pipes 23 on the side closer to each other. An electric push rod 35 is fixedly connected at the center of the top of the box body 1. The telescopic end of the bottom of the electric push rod 35 is fixedly connected to the top of the spray disc 22. An L-shaped connecting rod 25 is fixedly connected at the center of the side away from each other of the two spray pipes 23. The ends of the two L-shaped connecting rods 25 away from the spray pipes 23 extend to the left and right sides of the outside of the box body 1 and are slidably connected thereto.

[0025] It should be noted that this design improves the spacing between the spray pipe 23 and the spray head 24 and the headlights based on the reference patent. Other parts not mentioned are completely consistent with the reference design, such as the fan 14 and its related structure, so they will not be described in detail here.

[0026] The spray disc 22 is arranged in a circular pattern inside the test chamber 2, and is used to spray evenly from the top onto the surface of the headlight. Two vertical spray pipes 23 are installed on the left and right sides inside the test chamber 2, respectively, and extend vertically. Multiple spray heads 24 are equidistantly distributed between the bottom of the spray disc 22 and the side of the two spray pipes 23 that are close to each other, forming a surrounding spray layout to improve the spray coverage. An electric push rod 35 is installed at the top center of the box 1, and its telescopic end is connected to the top of the spray disc 22, which can be used to control the up and down movement of the spray disc 22. Each spray pipe 23 is connected to an L-shaped connecting rod 25 on the outside, which extends to the outside of the box 1 and slides thereto, so as to facilitate the position adjustment of the spray pipe 23.

[0027] The spray disc 22 is moved up and down by the electric push rod 35, and the spray pipe 23 is moved laterally by the L-shaped connecting rod 25. This allows for adjustment of the horizontal and vertical distance between the spray head 24 and the vehicle light under test. This adjustment structure can adapt to vehicle light products of different sizes, improving the applicability of the equipment. The position of the spray head 24 can be precisely adjusted according to actual testing needs, ensuring accurate spray position in each test. This helps to improve the repeatability and accuracy of test data. The use of the electric push rod 35 and the L-shaped connecting rod 25 makes the adjustment process of the spray structure more automated and convenient, saving time and labor costs.

[0028] Furthermore, a handle 301 is fixedly connected to the right side of the front of the tank door 3, a heater body 5 is fixedly connected inside the water tank 4, a temperature sensor 6 is fixedly connected to the top of one side of the inner wall of the water tank 4, and a controller 7 is fixedly connected to the right end of the front of the water tank 4.

[0029] A handle 301 is provided on the right side of the front of the chamber door 3, which makes it easy for operators to open and close the chamber door 3. The water tank 4 is equipped with a heater body 5, which can heat the liquid in the water tank 4 according to the test requirements, thereby generating a fog environment under different temperature conditions to simulate the anti-fog performance of the vehicle headlights under different climate conditions. The temperature sensor 6 is fixedly connected to the top of one side of the inner wall of the water tank 4, which is responsible for monitoring the temperature change of the liquid inside the water tank 4 in real time and feeding back the temperature signal to the controller 7 to ensure that the heating process is stable and controllable. The controller 7 is located on the right side of the front of the water tank 4, serving as the control center of the entire test device.

[0030] Furthermore, horizontal sealing rings 26 are fixedly connected to both sides of the box 1. The inner wall of the sealing ring 26 is slidably connected to the surface of the L-shaped connecting rod 25. A first corrugated pipe 33 is fixedly connected to the rear top of the spray disc 22, and a second corrugated pipe 34 is fixedly connected to the top of each of the two spray pipes 23.

[0031] The sealing ring 26 is set outside the L-shaped connecting rod 25. It can maintain the relative sealing state of the test chamber 2 inside the box 1 when the spray pipe 23 moves laterally with the L-shaped connecting rod 25, effectively preventing water mist leakage or abnormal inflow of external air, and ensuring the stability of the test environment.

[0032] Furthermore, a horizontally arranged diverter pipe 32 is fixedly connected to the rear side of the top of the housing 1. The first corrugated pipe 33 extends away from the spray disc 22 and is fixedly connected to the center of the front surface of the diverter pipe 32. The two second corrugated pipes 34 extend away from the spray pipe 23 and are fixedly connected to the left and right ends of the front side of the diverter pipe 32.

[0033] Since both the spray disc 22 and the spray pipe 23 can be adjusted in position according to testing requirements, and the first corrugated pipe 33 and the second corrugated pipe 34 have good extensibility and flexibility, they can move synchronously with the spray components without affecting the water flow, thus avoiding stress damage to rigid pipes caused by displacement. The water supply for all spray components is uniformly distributed by the diversion pipe 32 on the rear side of the top of the housing 1. The structure is compact and reasonable, and easy to maintain and clean. This design enhances the reliability and flexibility of the entire spray structure operation.

[0034] Furthermore, a horizontally arranged rectangular shell 27 is fixedly connected to the rear side of the outer wall of the housing 1. The rectangular shell 27 has horizontally arranged moving grooves 270 on both the left and right sides of the front. The L-shaped connecting rod 25 extends into the interior of the rectangular shell 27 at the end away from the spray pipe 23 and is slidably connected to the inner wall of the moving groove 270. A water pump 8 is fixedly connected to the rear side of the outer wall of the rectangular shell 27.

[0035] Since the end of the L-shaped connecting rod 25 is embedded in the moving groove 270 inside the rectangular shell 27 and can slide inside it, this structure provides precise motion trajectory control for the lateral displacement of the spray pipe 23, avoiding positional deviation or shaking caused by free movement, and ensuring that the spray head 24 is always at the set spray angle and distance. The rectangular shell 27 enhances the structural rigidity and load-bearing capacity of the L-shaped connecting rod 25 during the sliding process, and can effectively prevent the L-shaped connecting rod 25 from deforming or getting stuck.

[0036] Furthermore, a water pump 8 is fixedly connected to a water pump pipe 9 at its pumping end. The end of the water pump pipe 9 away from the water pump 8 is fixedly connected to the bottom rear side of the water tank 4. A water supply pipe 10 is fixedly connected to the water pump 8 at its outlet end. The end of the water supply pipe 10 away from the water pump 8 is fixedly connected to the center rear side of the diversion pipe 32. A horizontally arranged bidirectional threaded rod 29 is rotatably connected inside the rectangular shell 27.

[0037] The water pump 8 serves as the power source for the entire spray structure. Its pumping end is connected to the bottom rear of the water tank 4 via the pumping pipe 9, which can extract the liquid from the water tank 4 to provide water for subsequent spraying. One end of the pumping pipe 9 is connected to the lower part of the water tank 4 to ensure stable water intake under different water levels. The other end is firmly connected to the water inlet of the water pump 8 to ensure smooth water flow into the water pump 8. The water outlet of the water pump 8 is connected to the water delivery pipe 10. The other end of the water delivery pipe 10 extends to the center of the rear of the diversion pipe 32 and is fixedly connected thereto, so that the water output from the water pump 8 can be concentrated and delivered to the diversion pipe 32. Since the diversion pipe 32 is horizontally set at the rear of the top of the box 1 and is connected to the first corrugated pipe 33 and two second corrugated pipes 34 respectively, the water flow from the water pump 8 can be evenly distributed in the diversion pipe 32 to the spray disc 22 and the spray pipe 23, realizing the synchronous spraying operation of the spray disc 22 and the two spray pipes 23.

[0038] Furthermore, the bidirectional threaded rod 29 is threaded to both the left and right sides of the inner surface of the rectangular shell 27 with movable blocks 28. The front side of the movable block 28 is fixedly connected to the end of the L-shaped connecting rod 25 away from the spray pipe 23. The left and right sides of the inner wall of the rectangular shell 27 are fixedly connected with guide rods 31, and the two movable blocks 28 are slidably connected to the guide rods 31.

[0039] The movable blocks 28 on the left and right sides are threaded onto the bidirectional threaded rod 29. Each movable block 28 has an L-shaped connecting rod 25 fixedly connected to its front side. The other end of the L-shaped connecting rod 25 is connected to the spray pipe 23. When the bidirectional threaded rod 29 rotates, it will drive the movable block 28 to move along the direction of the guide rod 31, thereby adjusting the position of the spray pipe 23 through the L-shaped connecting rod 25. The power motor 30 is installed on one side of the outer wall of the rectangular shell 27 as a drive source. Its output shaft is directly fixedly connected to one end of the bidirectional threaded rod 29. After the power motor 30 is started, it can drive the bidirectional threaded rod 29 to rotate, thereby controlling the movement of the movable block 28 and the components connected to it.

[0040] Furthermore, the bidirectional threaded rod 29 is arranged parallel to the guide rod 31. One end of the bidirectional threaded rod 29 is rotatably connected to one side of the inner wall of the rectangular shell 27, and the other end of the bidirectional threaded rod 29 extends to one side of the outer wall of the rectangular shell 27 and is fixedly connected to the output end of the power motor 30. The power motor 30 is fixedly installed on one side of the outer wall of the rectangular shell 27.

[0041] The headlight to be tested is installed in the test chamber 2. The chamber door 3 is closed. The controller 7 starts the heater body 5. The temperature sensor 6 monitors the water temperature in the water tank 4 in real time to ensure that the water temperature reaches the test requirements. The power motor 30 is started to drive the bidirectional threaded rod 29 to rotate, which drives the two moving blocks 28 to move laterally along the guide rod 31, thereby adjusting the position of the L-shaped connecting rod 25. This further drives the spray pipe 23 to move left and right. At the same time, the electric push rod 35 controls the up and down displacement of the spray disc 22 to precisely adjust the distance between the spray head 24 and the headlight. The sealing ring 26 ensures that the sealing of the chamber 1 is not affected during the sliding of the L-shaped connecting rod 25.

[0042] Controller 7 activates water pump 8, which draws heated water from water tank 4 through water pipe 9. The water is then transported through water pipe 10 to the top distribution pipe 32. Distribution pipe 32 evenly distributes the water flow to the first corrugated pipe 33 and two second corrugated pipes 34. Water entering the first corrugated pipe 33 is transported to the inside of spray disc 22 and eventually reaches multiple spray nozzles 24. Water entering the two second corrugated pipes 34 is transported to the inside of spray pipe 23 and eventually reaches multiple side spray nozzles 24. All spray nozzles 24 begin spraying mist into the test chamber 2, covering the headlight surface. Fan 14 starts, generating high-speed airflow to simulate the wind speed conditions faced by the headlight when the vehicle is driving at high speed in rainy or high-humidity environments. The mist impacts the headlight surface under the action of the high-speed airflow, simulating the anti-fogging challenge in real use. The surrounding layout of spray disc 22, spray pipe 23, and spray nozzles 24 allows the mist to contact the headlight glass surface from all directions, enhancing the realism of the test.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A testing device for automotive headlights, comprising a housing (1) and a testing chamber (2) formed on its front side, wherein a door (3) is rotatably connected to the front side of the housing (1), a water tank (4) is fixedly connected to the bottom of the housing (1), and a fan (14) is rotatably provided on the rear side of the inner wall of the testing chamber (2), characterized in that: The test chamber (2) is equipped with a circular spray disc (22) at the top. The test chamber (2) is equipped with vertically arranged spray pipes (23) on both the left and right sides. Multiple spray heads (24) are fixedly connected at equal intervals between the bottom of the spray disc (22) and the two spray pipes (23) on the side closer to each other. An electric push rod (35) is fixedly connected at the center of the top of the box (1). The bottom extension end of the electric push rod (35) is fixedly connected to the top of the spray disc (22). An L-shaped connecting rod (25) is fixedly connected at the center of the side away from each other of the two spray pipes (23). The ends of the two L-shaped connecting rods (25) away from the spray pipes (23) extend to the left and right sides of the outside of the box (1) and slide to them.

2. The testing device for automotive headlights as described in claim 1, characterized in that: A handle (301) is fixedly connected to the right side of the front of the tank door (3), a heater body (5) is fixedly connected inside the water tank (4), a temperature sensor (6) is fixedly connected to the top of one side of the inner wall of the water tank (4), and a controller (7) is fixedly connected to the right end of the front of the water tank (4).

3. The testing device for automotive headlights as described in claim 1, characterized in that: The box (1) is fixedly connected to horizontal sealing rings (26) on both the left and right sides. The inner wall of the sealing ring (26) is slidably connected to the surface of the L-shaped connecting rod (25). The top rear side of the spray disc (22) is fixedly connected to a first corrugated pipe (33), and the top of the two spray pipes (23) is fixedly connected to a second corrugated pipe (34).

4. The testing device for automotive headlights as described in claim 3, characterized in that: A horizontally arranged diverter pipe (32) is fixedly connected to the rear top of the box (1). The first corrugated pipe (33) extends away from the spray disc (22) to the top outside of the box (1) and is fixedly connected to the center of the front surface of the diverter pipe (32). The two second corrugated pipes (34) extend away from the spray pipe (23) to the top outside of the box (1) and are fixedly connected to the left and right ends of the front side of the diverter pipe (32).

5. The testing device for automotive headlights as described in claim 4, characterized in that: A horizontally arranged rectangular shell (27) is fixedly connected to the rear side of the outer wall of the box (1). The rectangular shell (27) has horizontally arranged moving grooves (270) on both the left and right sides of the front. The L-shaped connecting rod (25) extends into the interior of the rectangular shell (27) away from the spray pipe (23) and is slidably connected to the inner wall of the moving groove (270). A water pump (8) is fixedly connected to the rear side of the outer wall of the rectangular shell (27).

6. The testing apparatus for automotive headlights as described in claim 5, characterized in that: The pump (8) is fixedly connected to a pump pipe (9) at its pumping end. The end of the pump pipe (9) away from the pump (8) is fixedly connected to the bottom of the rear side of the water tank (4). The pump (8) is fixedly connected to a water supply pipe (10) at its outlet end. The end of the water supply pipe (10) away from the pump (8) is fixedly connected to the center of the rear side of the diversion pipe (32). A horizontally arranged bidirectional threaded rod (29) is rotatably connected inside the rectangular shell (27).

7. The testing apparatus for automotive headlights as described in claim 6, characterized in that: The bidirectional threaded rod (29) is located on the left and right sides of the inner surface of the rectangular shell (27) and is threaded with movable blocks (28). The front side of the movable block (28) is fixedly connected to the end of the L-shaped connecting rod (25) away from the spray pipe (23). The left and right sides of the inner wall of the rectangular shell (27) are fixedly connected with guide rods (31). The two movable blocks (28) are slidably connected to the guide rods (31).

8. The testing apparatus for automotive headlights as described in claim 7, characterized in that: The bidirectional threaded rod (29) is arranged parallel to the guide rod (31). One end of the bidirectional threaded rod (29) is rotatably connected to one side of the inner wall of the rectangular shell (27). The other end of the bidirectional threaded rod (29) extends to one side of the outer wall of the rectangular shell (27) and is fixedly connected to the output end of the power motor (30). The power motor (30) is fixedly installed on one side of the outer wall of the rectangular shell (27).

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