Telescopic vehicle body cleaning mechanical arm system

Abstract

The utility model relates to the technical field of machinery, in particular to a car washing technology. The telescopic vehicle body cleaning mechanical arm system comprises a booster water pump system and a suspended ceiling guide rail arranged at the top of a vehicle cleaning room, the suspended ceiling guide rail is in sliding connection with a walking mechanism walking front and back, and a water outlet of the booster water pump system is at least communicated with two high-pressure water nozzles. The lower portion of the walking mechanism is connected with a cleaning execution system through a rotatable rotating device. The cleaning execution system is provided with a telescopic arm, a mounting frame is mounted at the telescopic end of the telescopic arm, a downward telescopic device is mounted on the mounting frame to serve as a mechanical arm, a rotating mechanism is mounted at the tail end of a telescopic part of the mechanical arm, and a high-pressure water nozzle is connected to the rotating mechanism. And through scanning type washing with a small spray head, small water volume and high water pressure, water and energy are saved, the cleanliness of car washing is improved, and the economic benefit of car washing is improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical technology, in particular to a car washing technology. Background Art

[0002] With the rapid growth of domestic car ownership, the car wash industry has developed rapidly. The number of traditional car wash stores continues to expand, intensifying competition in the industry.

[0003] Automatic car washing technology is divided into brush washing and brushless car washing. Existing brushless car washing basically adopts the method of multi-hole large-scale water spraying on the whole car. This method consumes a lot of water, and therefore has high requirements for pressurizing equipment, resulting in high costs for pressurizing equipment. In addition, the power consumption of pressurizing equipment that supports multi-hole large-scale water spraying on the whole car is also high, while the water pressure is difficult to reach a high level. Therefore, the water pressure impact during car washing is not strong enough, making it difficult to wash away the dirt with strong adhesion, affecting the cleanliness of the car wash. Utility Model Content

[0004] The purpose of the present utility model is to provide a telescopic car body cleaning robot arm system to solve at least one of the above technical problems.

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] The telescopic car body washing robot arm system includes a booster water pump system and a ceiling guide rail for being installed on the top of the washing room. The ceiling guide rail is slidably connected to a traveling mechanism for traveling forward and backward. The water outlet of the booster water pump system is connected to at least two high-pressure water nozzles.

[0007] The lower part of the walking mechanism is connected to a cleaning execution system through a rotatable rotating device;

[0008] A first telescopic arm is provided on one side of the cleaning execution system, a first mounting frame is installed on the telescopic end of the first telescopic arm, a downward telescopic device is installed on the first mounting frame as a first mechanical arm, a rotating mechanism is installed at the end of the telescopic portion of the first mechanical arm as a first rotating mechanism, and a first high-pressure water nozzle is connected to the first rotating mechanism;

[0009] A second telescopic arm is provided on the other side of the cleaning execution system. The telescopic end of the second telescopic arm is connected to a second mounting bracket. The second mounting bracket is connected to a downward telescopic device as a second robotic arm. Another rotating mechanism is installed at the end of the telescopic part of the second robotic arm as a second rotating mechanism. The second rotating mechanism is connected to a second high-pressure water nozzle.

[0010] The controlled movable parts of the telescopic car body washing robot arm system all have power devices, and the power devices are controlled by the car washing control system.

[0011] In the above design, the travel mechanism and the washing execution system are rotatably connected, thereby achieving all-round washing of the front, body, and rear of the vehicle. The washing execution system is provided with telescopic arms on the left and right sides, the telescopic portions of the telescopic arms being connected to mounting brackets, on which a telescopic device serving as a retractable mechanical arm is mounted. The telescopic portions of the mechanical arms are connected to a rotating mechanism, to which a high-pressure water nozzle is connected, enabling the high-pressure water nozzle to rotate up and down during car washing. During car washing, a car washing control system controls the travel mechanism to move on a ceiling track, thereby driving the high-pressure water nozzle to perform a sweeping flushing operation around the vehicle body using a small nozzle, a small water volume, and a high water pressure. This flushing method has a strong scouring force and can remove strongly adherent dirt. Its beneficial effects include saving water and electricity, requiring low specifications such as the water output and water pressure of the booster pump, resulting in a low cost for the booster pump, saving costs, and low power consumption during operation, saving electricity. The small water volume and small nozzle operation mode can increase the water pressure of the car wash, thereby improving the cleanliness of the car wash and enhancing the economic benefits of the car wash.

[0012] Furthermore, the telescopic device includes an inner tube as a fixed tube, and an outer tube as a movable tube is sleeved on the fixed tube and can slide up and down;

[0013] The telescopic device also includes a limiting mechanism for limiting the sliding of the movable tube on the fixed tube;

[0014] The limiting mechanism includes through holes evenly distributed along a straight line over at least 80-90% of the length of the front wall of the fixed tube as limiting holes, with the spacing of the limiting holes being 10-15 mm.

[0015] The movable tube further includes a latch seat provided on the tube wall facing forward at the upper end thereof, wherein the latch seat is connected with a latch inserted into the upper limit hole on the fixed tube.

[0016] In the above design, the telescopic device adopts the method of inner tube and outer tube to realize the telescopic structure. The beneficial effect is that this telescopic method has the advantage of simple structure, and the formed mechanical arm is light in weight and low in manufacturing cost.

[0017] In the above design, the limiting mechanism adopts a pin limiting method, which has the beneficial effect that the pin limiting method has the characteristics of simple structure, easy processing, and firm limiting; the arrangement interval of the limiting holes is 10 to 15 mm, and this arrangement interval allows for more adjustable positions, which can meet the needs of washing various types of cars.

[0018] Furthermore, sliding grooves are provided along a straight line on the tube walls on both sides of the fixed tube; and at least two sliding blocks corresponding to the sliding grooves on both sides of the fixed tube are provided on the inner wall of the movable tube.

[0019] In the above design, the fixed tube and the movable tube are connected by a slide groove and a slider, which guides the movable tube to slide on the fixed tube while keeping the latch and the limit hole in a straight line, so as to facilitate extension and limitation.

[0020] Furthermore, the rotating mechanism includes a telescopic rod, the rod portion of the telescopic rod is connected to a rotating rod that rotates up and down, the rotating rod is connected to the high-pressure water nozzle, and the telescopic rod is linked to the rotating rod to drive the high-pressure water nozzle to rotate up and down.

[0021] In the above design, the telescopic rod is linked to the rotating rod to drive the high-pressure water nozzle to rotate up and down. Its beneficial effect is that it changes the flushing angle of the high-pressure water flow, leaving no flushing dead angle, and improving the cleanliness of the car wash.

[0022] For further optimization, the telescopic rod adopts an electric push rod.

[0023] In the above design, the electric push rod has the beneficial effects of being small in size and easy to install and use.

[0024] Furthermore, a rotating mechanism is provided between the first mounting frame and the first robotic arm, referred to as the first rotating mechanism;

[0025] The first rotating mechanism includes a bidirectional motor, referred to as the first bidirectional motor, the output shaft of the first bidirectional motor is connected to the first mechanical arm through a coupling, and the first bidirectional motor drives the first mechanical arm to rotate left and right in the direction of washing the car;

[0026] A rotating mechanism is provided between the second mounting frame and the second robotic arm, which is referred to as the second rotating mechanism;

[0027] The second rotating mechanism includes another bidirectional motor as a second bidirectional motor. The output shaft of the second bidirectional motor is connected to the second robotic arm through a coupling. The second bidirectional motor links the second robotic arm to rotate left and right in the direction of car washing.

[0028] In the above design, the beneficial effect of the rotating mechanism is that when washing the car, the bidirectional motor is driven to rotate left and right under the control of the car wash control system, thereby driving the high-pressure water nozzle to rotate left and right, changing the flushing angle of the high-pressure water flow, overcoming the flushing blind spots, and improving the cleanliness of the car wash.

[0029] Further optimization, a storage system for storing the first robotic arm is further provided between the first bidirectional motor and the first robotic arm, the storage system includes a mounting bracket, the top end of the mounting bracket is connected to the output shaft of the first bidirectional motor through a coupling, an electric push rod is provided in the mounting bracket, the push rod of the electric push rod is connected to the first robotic arm, and the electric push rod links the first robotic arm to have a raised state and a lowered state;

[0030] Another storage system for storing the second robotic arm is also provided between the second bidirectional motor and the second robotic arm. The other storage system includes a mounting bracket. The top end of the mounting bracket is connected to the output shaft of the second bidirectional motor through a coupling. Another electric push rod is provided in the mounting bracket. The push rod of the other electric push rod is connected to the second robotic arm. The other electric push rod links the second robotic arm to have a lifted state and a dropped state.

[0031] In the above design, the storage system is provided with an electric push rod on the mounting bracket. The push rod of the electric push rod is movably connected to one end of the fixed tube of the robotic arm. A fulcrum is provided on the tube body of the fixed tube, and the fulcrum is connected to the mounting bracket. When the push rod of the electric push rod is pushed out, the robotic arm falls to a vertical state, and then the car is washed; when the push rod of the electric push rod is retracted, the robotic arm is lifted to a horizontal state and stored on the top of the wash room, freeing up space in the wash room for storage.

[0032] Furthermore, the first bidirectional motor and the second bidirectional motor are both permanent magnet low-speed synchronous bidirectional motors.

[0033] In the above design, the beneficial effect of using a permanent magnet low-speed synchronous bidirectional motor for the bidirectional motor is that the permanent magnet low-speed synchronous bidirectional motor has the characteristics of bidirectional rotation and is easy to integrate with the car wash control system to realize the intelligent car wash function.

[0034] The utility model discloses a rotating mechanism that can rotate left and right to connect the mechanical arm, and the rotating mechanism that can rotate up and down is connected to the mechanical arm, and the high-pressure water nozzle can rotate left and right in the direction of car washing, and rotate up and down at the same time, so that the flushing direction and angle of high-pressure water can be changed when washing the car, and the flushing ability of dirt with high adhesion is improved. The car washing control system drives the walking mechanism to drive the mechanical arm to move around the car body, thereby realizing a scanning-type flushing of the car body with a small nozzle, small water volume and high water pressure. Its beneficial effect is that it saves water for car washing and improves the cleanliness of car washing; its beneficial effect is also that it has low requirements for the booster water pump equipment, reduces the cost of the booster water pump equipment, reduces the power consumption of the booster water pump equipment, saves the cost of car washing, and improves the economic benefits of car washing. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0036] Figure 1 It is a schematic diagram of the utility model;

[0037] Figure 2This is a schematic diagram of the connection of the robotic arm of the present invention;

[0038] Figure 3 It is a partial schematic diagram of the movable tube of the utility model;

[0039] Figure 4 This is a schematic diagram of the car wash nozzle connection device of the present utility model;

[0040] Figure 5 It is a schematic diagram of the storage system behind the hidden mounting rack of the utility model.

[0041] Explanation of symbols:

[0042] 1. Ceiling rail; 2. Telescopic arm; 3. Mounting frame; 4. Robotic arm; 5. Travel mechanism; 6. Bidirectional motor; 7. Mounting bracket; 8. Electric push rod; 41. Fixed tube; 42. Movable tube; 411. Limit hole; 412. Slide groove; 421. Latch seat; 422. Latch; 423. Slider; 424. Telescopic rod; 425. Rotating rod. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0046] Furthermore, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it designate a separate or selective embodiment that is mutually exclusive with other embodiments.

[0047] Reference Figure 1 、 Figure 4As shown, the telescopic car body washing robot arm system includes a booster water pump system and a ceiling guide rail 1 for being set on the top of the washing room. The ceiling guide rail 1 is slidably connected to a traveling mechanism 5 that travels forward and backward. The water outlet of the booster water pump system is connected to at least two high-pressure water nozzles.

[0048] The lower portion of the walking mechanism 5 is connected to a cleaning execution system via a rotatable rotating device;

[0049] A telescopic arm 2 is provided on one side of the cleaning execution system as a first telescopic arm, a mounting frame 3 is installed on the telescopic end of the first telescopic arm as a first mounting frame, the first mounting frame is installed with a downward telescopic device as a first mechanical arm, a rotating mechanism is installed at the end of the telescopic portion of the first mechanical arm as a first rotating mechanism, and a first high-pressure water nozzle is connected to the first rotating mechanism;

[0050] Another telescopic arm is provided on the other side of the cleaning execution system as the second telescopic arm. The telescopic end of the second telescopic arm is connected to a mounting frame 3 as the second mounting frame. The second mounting frame is connected to a downward telescopic device as the second robotic arm. The end of the telescopic part of the second robotic arm is installed with another rotating mechanism as the second rotating mechanism. The second rotating mechanism is connected to the second high-pressure water nozzle.

[0051] The controlled movable parts of the telescopic car body washing robot arm system all have power devices, and the power devices are controlled by the car washing control system.

[0052] In this embodiment, the traveling mechanism 5 and the cleaning execution system are rotatably connected, so that the front, body and rear of the vehicle can be cleaned in all directions.

[0053] Example 1:

[0054] Telescopic arms 2 are respectively provided on the left and right sides of the cleaning execution system. The telescopic arms 2 are telescopic in a scissor-type manner and are telescopically extended by cross hinges and connecting rods.

[0055] In this embodiment, the telescopic part of the telescopic arm 2 is connected to the mounting frame 3, and a telescopic device is provided on the mounting frame 3 as a telescopic mechanical arm 4. The telescopic part of the mechanical arm 4 is connected to a rotating mechanism, and the rotating mechanism is connected to a high-pressure water nozzle, whose function is to rotate the high-pressure water nozzle up and down when washing the car. When washing the car, there is a car washing control system to control the walking mechanism 5 to move on the ceiling track, thereby driving the high-pressure water nozzle to perform a scanning flushing around the car body with a small nozzle, small water volume and high water pressure. This flushing method has a strong flushing force and can remove dirt with strong adhesion. Its beneficial effect is that it saves water and electricity, and has low requirements on the water output, water pressure and other specifications of the booster water pump. Therefore, the cost of the booster water pump is low, which saves costs, and the booster water pump has low power consumption when working, which can save electricity; the working mode of small water volume and small nozzle can increase the water pressure of the car wash, thereby improving the cleanliness of the car wash and improving the economic benefits of the car wash.

[0056] Example 2:

[0057] Reference Figure 2 As shown, the telescopic device includes an inner tube as a fixed tube 41, and an outer tube as a movable tube 42 is slidably sleeved on the fixed tube 41;

[0058] The telescopic device also includes a limiting mechanism for limiting the sliding of the movable tube 42 on the fixed tube 41;

[0059] The limiting mechanism includes through holes evenly distributed along a straight line over at least 80-90% of the length of the front wall of the fixed tube 41 as limiting holes 411, with the spacing of the limiting holes 411 being 10-15 mm.

[0060] A latch seat 421 is provided on the tube wall facing the front at the upper end of the movable tube 42 , and a latch 422 is connected to the latch seat 421 and inserted into the upper limit hole 411 of the fixed tube 41 .

[0061] In this embodiment, the telescopic device realizes a telescopic structure by adopting an inner tube and an outer tube. The beneficial effect is that this telescopic method has the advantage of a simple structure, and the resulting mechanical arm 4 is light in weight and low in manufacturing cost.

[0062] In this embodiment, the limiting mechanism adopts a pin 422 limiting method, which has the beneficial effect that the pin 422 limiting method has the characteristics of simple structure, easy processing, and firm limiting; the arrangement interval of the limiting holes 411 is 10 to 15 mm, and this arrangement interval allows for more adjustable positions, which can meet the needs of washing various types of cars.

[0063] Reference Figure 2 、 Figure 3 As shown, sliding grooves 412 are provided along a straight line on the tube walls on both sides of the fixed tube 41 ; and at least two sliding blocks 423 corresponding to the sliding grooves 412 on both sides of the fixed tube 41 are provided on the inner wall of the movable tube 42 .

[0064] In this embodiment, the fixed tube 41 and the movable tube 42 are connected by the sliding groove 412 and the slider 423. Their function is to guide the movable tube 42 to slide on the fixed tube 41, so that the pin 422 and the limiting hole 411 remain in a straight line, which is convenient for extension and limitation.

[0065] Example 3:

[0066] Reference Figure 4 As shown, the rotating mechanism includes a telescopic rod 424, the rod portion of the telescopic rod 424 is connected to a rotating rod 425 that rotates up and down, the rotating rod 425 is connected to the high-pressure water nozzle, and the telescopic rod 424 is linked to the rotating rod 425 to drive the high-pressure water nozzle to rotate up and down.

[0067] In this embodiment, the telescopic rod 424 is linked to the rotating rod 425 to drive the high-pressure water nozzle to rotate up and down, which has the beneficial effect of changing the flushing angle of the high-pressure water flow, leaving no flushing dead angle, and improving the cleanliness of the car wash.

[0068] For further optimization, the telescopic rod 424 adopts an electric push rod.

[0069] In this embodiment, the electric push rod has the beneficial effects of being small in size and easy to install and use.

[0070] Example 4:

[0071] Reference Figure 5 As shown, a rotating mechanism is provided between the first mounting frame and the first mechanical arm, which is referred to as the first rotating mechanism;

[0072] The first rotating mechanism includes a bidirectional motor 6, referred to as the first bidirectional motor, the output shaft of the first bidirectional motor is connected to the first mechanical arm through a coupling, and the first bidirectional motor drives the first mechanical arm to rotate left and right in the direction of washing the car;

[0073] A rotating mechanism is provided between the second mounting frame and the second robotic arm, which is referred to as the second rotating mechanism;

[0074] The second rotating mechanism includes another bidirectional motor as a second bidirectional motor. The output shaft of the second bidirectional motor is connected to the second robotic arm through a coupling. The second bidirectional motor links the second robotic arm to rotate left and right in the direction of car washing.

[0075] In this embodiment, the beneficial effect of the rotating mechanism is that when washing the car, the bidirectional motor 6 is driven to rotate left and right under the control of the car washing control system, thereby driving the high-pressure water nozzle to rotate left and right, changing the flushing angle of the high-pressure water flow, overcoming the flushing dead corners, and improving the cleanliness of the car wash.

[0076] Example 5:

[0077] Reference Figure 5 As shown, a storage system for accommodating the first robotic arm is further provided between the first bidirectional motor and the first robotic arm. The storage system includes a mounting bracket 7. The top end of the mounting bracket 7 is connected to the output shaft of the first bidirectional motor via a coupling. An electric push rod 8 is provided in the mounting bracket 7. The push rod of the electric push rod 8 is connected to the first robotic arm. The electric push rod 8 links the first robotic arm to have a raised state and a lowered state.

[0078] Another storage system for storing the second robotic arm is also provided between the second bidirectional motor and the second robotic arm. The other storage system includes a mounting bracket 7. The top end of the mounting bracket 7 is connected to the output shaft of the second bidirectional motor through a coupling. Another electric push rod is provided in the mounting bracket 7. The push rod of the other electric push rod is connected to the second robotic arm. The other electric push rod links the second robotic arm to have a lifted state and a dropped state.

[0079] Example 6:

[0080] The storage system is provided with an electric push rod 8 on the mounting bracket 7. The push rod of the electric push rod 8 is movably connected to one end of the fixed tube 41 of the robotic arm 4. A fulcrum is provided on the tube body of the fixed tube 41, and the fulcrum is connected to the mounting bracket 7. When the push rod of the electric push rod 8 is pushed out, the robotic arm 4 falls to a vertical state, and then the car is washed; when the push rod of the electric push rod 8 is retracted, the robotic arm 4 is lifted to a horizontal state and stored on the top of the washing room, freeing up space in the washing room for storage.

[0081] Furthermore, the first bidirectional motor and the second bidirectional motor are both permanent magnet low-speed synchronous bidirectional motors.

[0082] In this embodiment, the bidirectional motor 6 adopts a permanent magnet low-speed synchronous bidirectional motor. The beneficial effect is that the permanent magnet low-speed synchronous bidirectional motor has the characteristics of bidirectional rotation and is easy to integrate with the car washing control system to realize the intelligent car washing function.

[0083] Furthermore, in order to provide a concise description of the exemplary embodiments, all features of the actual embodiment may not be described, i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention.

[0084] It should be understood that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0085] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A telescopic car body washing robot arm system includes a booster water pump system and a ceiling rail for installation on the top of the washroom. The ceiling rail is slidably connected to a traveling mechanism for forward and backward movement. The system is characterized by: The water outlet of the booster water pump system is connected to at least two high-pressure water nozzles; The lower part of the walking mechanism is connected to a cleaning execution system through a rotatable rotating device; A first telescopic arm is provided on one side of the cleaning execution system, a first mounting frame is installed on the telescopic end of the first telescopic arm, a downward telescopic device is installed on the first mounting frame as a first mechanical arm, a rotating mechanism is installed at the end of the telescopic portion of the first mechanical arm as a first rotating mechanism, and a first high-pressure water nozzle is connected to the first rotating mechanism; A second telescopic arm is provided on the other side of the cleaning execution system. The telescopic end of the second telescopic arm is connected to a second mounting bracket. The second mounting bracket is connected to a downward telescopic device as a second robotic arm. Another rotating mechanism is installed at the end of the telescopic part of the second robotic arm as a second rotating mechanism. The second rotating mechanism is connected to a second high-pressure water nozzle.

2. The telescopic car body cleaning robot arm system according to claim 1, characterized in that: The telescopic device includes an inner tube as a fixed tube, and an outer tube as a movable tube which is slidable up and down outside the fixed tube. The telescopic device also includes a limiting mechanism for limiting the sliding of the movable tube on the fixed tube; The limiting mechanism includes through holes evenly distributed along a straight line over at least 80-90% of the length of the front wall of the fixed tube as limiting holes, with the spacing of the limiting holes being 10-15 mm. The movable tube further includes a latch seat provided on the tube wall facing forward at the upper end thereof, wherein the latch seat is connected with a latch inserted into the upper limit hole on the fixed tube.

3. The telescopic car body cleaning robot arm system according to claim 2, characterized in that: Slide grooves are provided along the straight lines on the pipe walls on both sides of the fixed pipe; The inner wall of the movable tube is provided with at least two sliding blocks corresponding to the sliding grooves on both sides of the fixed tube.

4. The telescopic car body cleaning robot arm system according to claim 1, characterized in that: The rotating mechanism includes a telescopic rod, the rod portion of the telescopic rod is connected to a rotating rod that rotates up and down, the rotating rod is connected to the high-pressure water nozzle, and the telescopic rod is linked to the rotating rod to drive the high-pressure water nozzle to rotate up and down.

5. The telescopic car body cleaning robot arm system according to claim 4, characterized in that: The telescopic rod adopts an electric push rod.

6. The telescopic car body cleaning robot arm system according to claim 1, characterized in that: A rotating mechanism is provided between the first mounting frame and the first mechanical arm, which is referred to as the first rotating mechanism; The first rotating mechanism includes a bidirectional motor, referred to as the first bidirectional motor, the output shaft of the first bidirectional motor is connected to the first mechanical arm through a coupling, and the first bidirectional motor drives the first mechanical arm to rotate left and right in the direction of washing the car; A rotating mechanism is provided between the second mounting frame and the second robotic arm, which is referred to as the second rotating mechanism; The second rotating mechanism includes another bidirectional motor as a second bidirectional motor. The output shaft of the second bidirectional motor is connected to the second robotic arm through a coupling. The second bidirectional motor links the second robotic arm to rotate left and right in the direction of car washing.

7. The telescopic car body washing robot arm system according to claim 6, characterized in that: A storage system for accommodating the first robotic arm is further provided between the first bidirectional motor and the first robotic arm. The storage system includes a mounting bracket. The top end of the mounting bracket is connected to the output shaft of the first bidirectional motor via a coupling. An electric push rod is provided in the mounting bracket. The push rod of the electric push rod is connected to the first robotic arm. The electric push rod links the first robotic arm to have a raised state and a lowered state. Another storage system for storing the second robotic arm is also provided between the second bidirectional motor and the second robotic arm. The other storage system includes a mounting bracket. The top end of the mounting bracket is connected to the output shaft of the second bidirectional motor through a coupling. Another electric push rod is provided in the mounting bracket. The push rod of the other electric push rod is connected to the second robotic arm. The other electric push rod links the second robotic arm to have a lifted state and a dropped state.

8. The telescopic car body cleaning robot arm system according to claim 6, characterized in that: The first bidirectional motor and the second bidirectional motor both adopt permanent magnet low-speed synchronous bidirectional motors.

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