Mechanical arm and road sweeper

Abstract

The utility model relates to a mechanical arm and a road sweeper, the mechanical arm comprises a first force arm, a second force arm, a first elastic piece, a second elastic piece, a first buffer piece, a second buffer piece, a rotating shaft and a first bolt, and the first force arm, the second force arm, the first buffer piece and the second buffer piece are all rotatably connected with the rotating shaft; the second force arm is provided with a limiting piece for limiting the first buffering piece and the second buffering piece; the first elastic piece is connected with the first buffer piece and one side of the second force arm; the second elastic piece is connected with the other side of the second force arm and the second buffer piece; the first buffering piece and the second buffering piece are each provided with a first inserting hole, and the first plug pin penetrates through the first force arm to be connected with any first inserting hole in an inserted mode. According to the road sweeper, the connecting joint of the first force arm and the second force arm is designed, when the cleaning assembly collides, collision energy can be reduced and transmitted to a vehicle carrying the road sweeper, and therefore the driving comfort of the vehicle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of environmental sanitation equipment, especially relates to a mechanical arm and road sweeper. BACKGROUND

[0002] The road sweeper is usually carried on the special environmental sanitation vehicle, and the road sweeper usually comprises a mechanical arm and a sweeping assembly (such as a rotating brush), the mechanical arm is installed on the head of the environmental sanitation vehicle, the sweeping assembly is arranged at the tail end of the mechanical arm, the attitude of the mechanical arm is adjusted by manual and / or electric control, so that the sweeping assembly is placed in the required position, thereby realizing the sweeping of the road surface, guardrails and the like. Considering various factors, it is usually required that the structure of the road sweeper is as simple as possible and durable, and the control operation is also required to be simple. In addition, because the environmental sanitation vehicle has a long working time, new requirements are put forward for the comfort of the environmental sanitation vehicle. In the past, after the attitude of the mechanical arm is adjusted, the mechanical arm can be regarded as a fixed structure, and because of the driving level of the driver and the road conditions and other factors, the sweeping assembly inevitably collides with the road edge, guardrails and the like, and the collision energy is directly transmitted to the head, which greatly affects the driving comfort. SUMMARY

[0003] The utility model discloses a mechanical arm and road sweeper, which can better buffer the collision of the road sweeper, improve the comfort of the vehicle carrying the same, and has a simple structure.

[0004] To achieve the above-mentioned purpose, the utility model discloses a kind of mechanical arm, it includes first force arm, second force arm, first elastic piece, second elastic piece, first buffer, second buffer, pivot and first bolt, the second end of the first force arm, the first end of second force arm, the first end of first buffer and the first end of second buffer are all with pivot rotation connection;The first end of the second force arm is equipped with the limiting piece for limiting first buffer and second buffer;One end of the first elastic piece is connected with the second end of first buffer, the other end of the first elastic piece is connected with the side of the first end of second force arm, one end of the second elastic piece is connected with the other side of the first end of second force arm, the other end of the second elastic piece is connected with the second end of second buffer;The second end of the first buffer and the second end of second buffer are equipped with first insertion hole, the first bolt is inserted with any first insertion hole by the second end of first force arm, the second end of the first force arm is equipped with the first bolt hole for the first bolt to pass through;The second end of the second force arm is the tail end mounting point of the mechanical arm.

[0005] After the above setting, the second force arm can be limited relative to the first force arm through the first pin, the first buffer is pulled to the limiting piece through the first elastic piece, the second buffer is pulled to the limiting piece through the second elastic piece, when the direction of the external force (collision) of the second force arm is on the same plane as the rotation direction of the second force arm, the external force can be buffered through the first elastic piece and the second elastic piece, so as to reduce the transmission of collision energy to the first force arm, and the first pin can also play a certain protective role.

[0006] Preferably, the first end of the second force arm is further provided with a limiting auxiliary piece, both sides of the limiting auxiliary piece are provided with limiting parts, and the second end of the first buffer and the second end of the second buffer are provided with blocking parts matched with the limiting parts. After such setting, the limiting ability of the second force arm to the first buffer and the second buffer can be improved, and the reliability and firmness of the structure can be improved.

[0007] Preferably, the blocking part is a tubular structure, the inner cavity of the blocking part is the first insertion hole, and the limiting part is an open slot matched with the shape of the blocking part. After such setting, the structure is simpler, the contact surface of the limiting part and the blocking part is larger, and the limiting part is less likely to deform.

[0008] Preferably, it further comprises a mounting frame and a second pin, the first end of the first force arm is rotatably connected to the middle position of the mounting frame, the mounting frame is provided with a supporting groove for limiting and supporting the first force arm, two second pin holes are provided on the supporting groove and symmetrically arranged on both sides of the connecting node of the first force arm and the mounting frame, and the first force arm is provided with a second insertion hole matched with the second pin hole; the second pin, the second insertion hole and the second pin hole cooperate to limit the first force arm. After such setting, the mechanical arm is more varied, and when it is applied to a road sweeping machine, by connecting different first insertion holes through the first pin and connecting different second pin holes through the second pin, the sweeping assembly can be conveniently adjusted to be arranged on the left side or the right side of the vehicle.

[0009] Preferably, it further comprises a lifting assembly, the lifting assembly comprises two third force arms, a vertical platform and a linear movement driving piece, the two third force arms are arranged in parallel, the first end of the third force arm is rotatably connected to the second end of the second force arm, and the second end of the third force arm is rotatably connected to the vertical platform; the linear movement driving piece comprises a fixed part and a movable part, the fixed part is rotatably connected to the second end of the second force arm, and the movable part is rotatably connected to any third force arm; and the vertical platform is the end mounting point of the mechanical arm. The lifting assembly with such setting has a simple structure and can keep the vertical platform in a vertical state during lifting, which is beneficial to the use of the sweeping assembly. By setting the lifting assembly, the height of the sweeping assembly can be conveniently adjusted.

[0010] Preferably, a rotating assembly is further included, the rotating assembly comprises a rotating table, a rotating table driver and a fourth force arm, the rotating table is installed on the vertical platform, the rotating table driver drives the rotating table to rotate, a first end of the fourth force arm is connected with the rotating table, and a second end of the fourth force arm is the end mounting point of the mechanical arm. By arranging the rotating assembly, the cleaning surface of the cleaning assembly can be inclined, so that more cleaning occasions can be adapted, and in addition, the arrangement of the rotating assembly can also improve the obstacle crossing capability of the cleaning assembly, for example, the cleaning assembly can be driven to be flat, and compared with the vertical state of the cleaning assembly, the cleaning assembly can cross higher obstacles.

[0011] Preferably, a first slope adjusting assembly arranged between the lifting assembly and the rotating assembly is further included, the first slope adjusting assembly comprises a fixed seat, a rotating seat and a third latch, the fixed seat is connected with the vertical platform, the rotating seat is rotationally connected with the fixed seat, and the rotating seat rotates horizontally relative to the fixed seat; a plurality of third insertion holes are arranged on the rotating seat along a rotating center circle, and a plurality of third latch holes used for matching the third insertion holes are arranged on the fixed seat in a circle, and the third latch, the third insertion hole and the third latch hole are matched to limit the rotating seat. After being arranged in this way, the distance of the cleaning assembly extending to the side of the vehicle can be conveniently adjusted.

[0012] Preferably, a second slope adjusting assembly is further included, the second slope adjusting assembly comprises a fifth force arm, a first adjusting screw, a second adjusting screw and an adjusting sleeve, a first end of the fifth force arm is rotationally connected with the second end of the fourth force arm, and the fifth force arm swings up and down relative to the fourth force arm; a second end of the fifth force arm is the end mounting point of the mechanical arm; a first threaded hole and a second threaded hole are arranged in the inner cavity of the adjusting sleeve, and the screw thread directions of the first threaded hole and the second threaded hole are opposite; one end of the first adjusting screw is rotationally connected with the second end of the fourth force arm, the other end of the first adjusting screw is threadedly connected with the first threaded hole, one end of the second adjusting screw is rotationally connected with the first end of the fifth force arm, and the other end of the second adjusting screw is threadedly connected with the second threaded hole. After being arranged in this way, the slope of the cleaning assembly can be conveniently adjusted.

[0013] The utility model discloses still a kind of road sweeper, it includes cleaning assembly and above-mentioned mechanical arm, the cleaning assembly is installed in the end mounting point of mechanical arm. The road sweeper of above-mentioned setting, when the cleaning assembly collides, can reduce the collision energy transmission to the vehicle carrying the road sweeper, to improve the driving comfort of the vehicle.

[0014] Preferably, the cleaning assembly includes a rotating brush, a rotating brush driver and an optionally arranged water spraying element, the rotating brush driver is connected to the end mounting point of the mechanical arm, and the rotating brush driver drives the rotating brush to rotate; the water spraying element is fixed relative to the position of the rotating brush driver. The cleaning assembly arranged in this way is simple in structure.

[0015] The utility model has the following beneficial effects:

[0016] The first bolt can limit the second force arm relative to the first force arm, the first elastic member pulls the first buffer member to the limiting member, the second elastic member pulls the second buffer member to the limiting member, when the cleaning assembly collides, the force generated by the collision can be buffered by the first elastic member and the second elastic member, thereby reducing the collision energy transmitted to the vehicle carrying the road sweeper, thereby improving the driving comfort of the vehicle, and the first bolt can also play a certain protective role. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of embodiment one.

[0018] Figure 2 It is a schematic view of another perspective of embodiment one.

[0019] Figure 3 It is a schematic view of the connection between the first force arm and the second force arm of embodiment one.

[0020] Figure 4 It is Figure 3 It is a schematic view of the first force arm hidden.

[0021] Figure 5 It is an exploded schematic view of the connection between the first force arm and the second force arm of embodiment one.

[0022] Figure 6 It is a schematic view of the lifting assembly of embodiment one.

[0023] Figure 7 It is a schematic view of the first slope adjustment assembly and the rotating assembly of embodiment one.

[0024] Figure 8 It is a schematic view of the second slope adjustment assembly of embodiment one.

[0025] Figure 9 It is a schematic view of embodiment two.

[0026] Explanation of main component symbols:

[0027] Rotary brush 11, rotary brush driving member 12, water spraying member 13;

[0028] Mounting frame 20, support groove 21, second bolt 22;

[0029] First force arm 30, rotating shaft 31;

[0030] Second force arm 40, limiting member 41, limiting auxiliary member 42, limiting part 43;

[0031] Lifting assembly 50, third force arm 51, vertical platform 52, linear movement driving part 53;

[0032] First slope adjustment assembly 60, fixed seat 61, rotating seat 62, third bolt 63;

[0033] Rotary assembly 70, rotating table 71, rotating table driving part 72, fourth force arm 73;

[0034] Second slope adjustment assembly 80, fifth force arm 81, first adjusting screw 82, second adjusting screw 83, adjusting sleeve 84;

[0035] First elastic member 91, second elastic member 92, first buffer 93, second buffer 94, blocking part 95, first insertion hole 96, first bolt 97. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further detailed in combination with the drawings and examples.

[0037] Example one

[0038] As Figures 1-8 shown, the embodiment discloses a road sweeper, which comprises a mechanical arm and a sweeping assembly, the sweeping assembly is installed on the end mounting point of the mechanical arm, in the embodiment, the sweeping assembly comprises a rotating brush 11 and a rotating brush driving part 12, the rotating brush driving part 12 is bolted on the end mounting point of the mechanical arm, the rotating brush driving part 12 is a hydraulic motor or a motor, and the rotating brush driving part 12 drives the rotating brush 11 to rotate. In addition, the sweeping assembly can also be equipped with a water spraying part 13, the water spraying part 13 is fixedly arranged relative to the rotating brush driving part 12, water can be sprayed on the rotating brush 11, so that the cleaning effect can be improved. The form of the rotating brush 11 can be various, and the rotating brush 11 in the embodiment has the same direction of bristles, i.e. flat brush.

[0039] The mechanical arm comprises a mounting frame 20, a first force arm 30, a second force arm 40, a lifting assembly 50, a first slope adjustment assembly 60, a rotating assembly 70 and a second slope adjustment assembly 80 connected in sequence. The mounting frame 20 serves as the starting point of the mechanical arm, and the mounting frame 20 is connected with the front of the vehicle. The first end of the first force arm 30 is rotatably connected at the middle position of the mounting frame 20, and a supporting groove 21 for limiting and supporting the first force arm 30 is arranged on the mounting frame 20. By supporting the first force arm 30 through the supporting groove 21, it can be ensured that the first force arm 30 remains horizontal, and the connecting node (shaft) of the first force arm 30 and the mounting frame 20 can also be protected. The length direction of the supporting groove 21 is the left-right direction of the vehicle, and the first force arm 30 can be placed on the left side or the right side of the vehicle by rotating the first force arm 30, so that the cleaning assembly is placed on the left side or the right side of the vehicle. The first force arm 30 is limited by the second pin 22, specifically, two second pin holes are arranged on the supporting groove 21, and the two second pin holes are symmetrically arranged on both sides of the connecting node (shaft) of the first force arm 30 and the mounting frame 20. A second pin hole matched with the second pin hole is also arranged on the first force arm 30, and the first force arm 30 is limited by the cooperation of the second pin 22, the second pin hole and the second pin hole. After such arrangement, the mechanical arm is more varied, and when it is applied to the road sweeping machine, by pinning different first pin holes 96 by the first pin 97 and pinning different second pin holes by the second pin 22, the sweeping assembly can be conveniently adjusted to be arranged on the left side or the right side of the vehicle.

[0040] The second force arm 40 is rotatably connected with the first force arm 30, and the second force arm 40 is limited by the first pin 97. In addition, the first elastic member 91, the second elastic member 92, the first buffer member 93 and the second buffer member 94 are arranged between the two. Specifically, the second end of the first force arm 30, the first end of the second force arm 40, the first end of the first buffer member 93 and the first end of the second buffer member 94 are rotatably connected with a rotating shaft 31, and the two ends of the rotating shaft 31 are limited. The second force arm 40, the first buffer member 93 and the second buffer member 94 are horizontally rotatable, and the first buffer member 93 and the second buffer member 94 are oppositely arranged. The first end of the second force arm 40 is provided with a limiting member 41 and a limiting auxiliary member 42 for limiting the first buffer member 93 and the second buffer member 94. The two sides of the limiting auxiliary member 42 are provided with limiting portions 43, and the second end of the first buffer member 93 and the second end of the second buffer member 94 are provided with blocking portions 95 matched with the limiting portions 43. As a preferred embodiment, the blocking portion 95 is a tubular structure, that is, the blocking portion 95 can be a steel pipe welded on the buffer member. Correspondingly, the limiting portion 43 is an open slot (the slot is arc-shaped) matched with the shape of the blocking portion 95.

[0041] One end of the first elastic member 91 is connected to the second end of the first buffer member 93, the other end of the first elastic member 91 is connected to one side of the first end of the second force arm 40, one end of the second elastic member 92 is connected to the other side of the first end of the second force arm 40, and the other end of the second elastic member 92 is connected to the second end of the second buffer member 94. The first elastic member 91 and the second elastic member 92 can be selected as springs, and in addition, a plurality of connection holes are provided on the first end of the second force arm 40, the second end of the first buffer member 93, and the second end of the second buffer member 94, and the tension of the spring can be adjusted by hanging the spring in different connection holes. Under the action of the spring force, the first buffer member 93 and the second buffer member 94 abut against the limiting member 41, and at the same time, the stop portion 95 abuts against the limiting portion 43. The inner cavity of the stop portion 95 is a first insertion hole 96, a first insertion pin hole is provided on the second end of the first force arm 30, and the first insertion pin 97 passes through the first insertion pin hole and any one of the first insertion holes 96, so that the second force arm 40 can be limited, and in this state, the second force arm 40 is perpendicular to the first force arm 30 or the included angle between the two is slightly greater than 90°.

[0042] After the above setting, the second force arm 40 can be limited relative to the first force arm 30 by the first insertion pin 97, the first buffer member 93 is pulled towards the limiting member 41 by the first elastic member 91, and the second buffer member 94 is pulled towards the limiting member 41 by the second elastic member 92. When the direction of the external force (collision) acting on the second force arm 40 is in the same plane as the rotation direction of the second force arm 40, the external force can be buffered by the first elastic member 91 and the second elastic member 92, so as to reduce the transmission of collision energy to the first force arm 30, the mounting frame 20 and the vehicle head, and the first insertion pin 97 can also play a certain protection role. Through the above design, the anti-shock ability of the whole cleaning machine can be guaranteed, which is beneficial to guarantee the service life of the cleaning machine.

[0043] The lifting assembly 50 is used to adjust the height of the cleaning assembly, and the lifting assembly 50 comprises two third force arms 51, a vertical platform 52 and a linear movement driving member 53. The two third force arms 51 are arranged in parallel and spaced apart from each other, the first end of the third force arm 51 is rotationally connected to the second end of the second force arm 40, and the second end of the third force arm 51 is rotationally connected to the vertical platform 52. After such setting, no matter how the third force arm 51 swings, the vertical state of the vertical platform 52 can be guaranteed. The linear movement driving member 53 comprises a fixed part and a movable part, the fixed part is rotationally connected to the second end of the second force arm 40, and an elevation seat can be provided above the second end of the second force arm 40 for rotationally connecting with the fixed part, and the movable part is rotationally connected with any one of the third force arms 51, preferably with the lower third force arm 51. The linear movement driving member 53 can be a hydraulic cylinder, the fixed part is the seat body of the hydraulic cylinder, and the movable part is the push rod of the hydraulic cylinder. By controlling the stroke of the push rod of the hydraulic cylinder, the vertical platform 52 can be lifted or lowered.

[0044] The first tilt adjustment component 60 is used to adjust the distance of the sweeping component extending from the side of the vehicle. The first tilt adjustment component 60 includes a fixed base 61, a rotating base 62, and a third pin 63. The fixed base 61 is welded or bolted to the vertical platform 52. The rotating base 62 is rotatably connected to the fixed base 61 and cannot detach from the fixed base 61, and the rotating base 62 rotates horizontally relative to the fixed base 61. Several third insertion holes are arranged around the circumference of the rotating base 62 along its rotation center. Several third pin holes for engaging with the third insertion holes are arranged around the circumference of the fixed base 61. The third pin holes can be aligned with the third insertion holes. The rotating base 62 can be limited by the engagement of the third pin 63, the third insertion holes, and the third pin holes. This arrangement facilitates...

[0045] The rotating assembly 70 allows the cleaning assembly to tilt or swing. The rotating assembly 70 includes a turntable 71, a turntable drive 72, and a fourth lever arm 73. The base of the turntable 71 is bolted to the vertical platform 52. The turntable drive 72 drives the rotating portion of the turntable 71 to rotate. The turntable drive 72 can be a hydraulic motor or an electric motor. The first end of the fourth lever arm 73 is welded to or flanged to the rotating portion of the turntable 71.

[0046] The second tilt adjustment assembly 80 is used to customize the tilt of the cleaning assembly. The second tilt adjustment assembly 80 includes a fifth lever arm 81, a first adjusting screw 82, a second adjusting screw 83, and an adjusting sleeve 84. The first end of the fifth lever arm 81 is rotatably connected to the second end of the fourth lever arm 73, and the fifth lever arm 81 swings up and down relative to the fourth lever arm 73. The second end of the fifth lever arm 81 is the end mount point of the robotic arm. The inner cavity of the adjusting sleeve 84 has a first threaded hole and a second threaded hole, with the threads of the first threaded hole and the second threaded hole having opposite directions. One end of the first adjusting screw 82 is rotatably connected to the second end of the fourth lever arm 73, and the other end of the first adjusting screw 82 is threadedly connected to the first threaded hole. One end of the second adjusting screw 83 is rotatably connected to the first end of the fifth lever arm 81, and the other end of the second adjusting screw 83 is threadedly connected to the second threaded hole. By rotating the adjusting sleeve 84, the tilt of the fifth lever arm 81 can be easily adjusted, thereby adjusting the tilt of the cleaning assembly. The adjusting sleeve 84 can be designed in a regular hexagonal shape for easy rotation.

[0047] Example 2

[0048] like Figure 9 As shown, the difference between this embodiment and Embodiment 1 is that the bristles of the rotating brush 11 are radially distributed, that is, the rotating brush 11 is a roller brush. In addition, the first slope adjustment component 60 and the second slope adjustment component 80 are omitted in this embodiment. In this embodiment, the turntable 71 of the rotating assembly is directly installed on the vertical platform 52 of the lifting assembly 50, and the second end of the fourth lever arm 73 serves as the end mounting point of the robotic arm.

[0049] Of course, the rotating assembly 70 can also be omitted on the basis of embodiment two, at this time the vertical platform 52 of the lifting assembly 50 is used as the end mounting point of the mechanical arm, which is embodiment three. On the basis of embodiment three, the lifting assembly 50 can also be omitted, at this time the second end of the second force arm 40 is used as the end mounting point of the mechanical arm, which is embodiment four.

[0050] In addition, on the basis of any of the above embodiments, the mounting frame 20 can also be omitted, so that the first end of the first force arm 30 is directly fixed or rotatably connected with the vehicle head.

[0051] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A robotic arm, characterized in that: The system includes a first lever arm, a second lever arm, a first elastic element, a second elastic element, a first buffer element, a second buffer element, a rotating shaft, and a first pin. The second end of the first lever arm, the first end of the second lever arm, the first end of the first buffer element, and the first end of the second buffer element are all rotatably connected to the rotating shaft. The first end of the second lever arm is provided with a limiting element for restricting the first and second buffer elements. One end of the first elastic element is connected to the second end of the first buffer element, and the other end of the first elastic element is connected to one side of the first end of the second lever arm. One end of the second elastic element is connected to the other side of the first end of the second lever arm, and the other end of the second elastic element is connected to the second end of the second buffer element. The second ends of the first and second buffer elements are each provided with a first insertion hole. The first pin passes through the second end of the first lever arm and is inserted into any of the first insertion holes. The second end of the first lever arm is provided with a first pin hole for the first pin to pass through. The second end of the second lever arm is the end mount point of the robotic arm.

2. The robotic arm according to claim 1, characterized in that: The first end of the second lever arm is also provided with a limiting auxiliary component, and both sides of the limiting auxiliary component are provided with limiting portions. The second end of the first buffer component and the second end of the second buffer component are both provided with a stop portion that cooperates with the limiting portion for limiting.

3. The robotic arm according to claim 2, characterized in that: The stop is a tubular structure, and the inner cavity of the stop is the first insertion hole; the limiting part is an opening groove adapted to the shape of the stop.

4. The robotic arm according to claim 1, characterized in that: It also includes a mounting bracket and a second pin. The first end of the first lever arm is rotatably connected to the middle position of the mounting bracket. The mounting bracket is provided with a support groove for limiting and supporting the first lever arm. The support groove is provided with two second pin holes, and the two second pin holes are symmetrically arranged on both sides of the connection node between the first lever arm and the mounting bracket. The first lever arm is provided with a second insertion hole that mates with the second pin holes. The second pin, the second insertion hole, and the second pin hole cooperate to limit the first lever arm.

5. The robotic arm according to claim 1, characterized in that: It also includes a lifting assembly, which comprises two third arms, a vertical platform, and a linear motion drive. The two third arms are arranged parallel to each other vertically. The first end of each third arm is rotatably connected to the second end of the second arm, and the second end of the third arm is rotatably connected to the vertical platform. The linear motion drive comprises a fixed part and a movable part. The fixed part is rotatably connected to the second end of the second arm, and the movable part is rotatably connected to either third arm. The vertical platform is the end mount point of the robotic arm.

6. The robotic arm according to claim 5, characterized in that: It also includes a rotating assembly, which includes a turntable, a turntable drive and a fourth lever arm. The turntable is mounted on a vertical platform, the turntable drive drives the turntable to rotate, the first end of the fourth lever arm is connected to the turntable, and the second end of the fourth lever arm is the end mount point of the robotic arm.

7. The robotic arm according to claim 6, characterized in that: It also includes a first tilt adjustment component disposed between the lifting component and the rotating component. The first tilt adjustment component includes a fixed base, a rotating base, and a third pin. The fixed base is connected to the vertical platform, and the rotating base is rotatably connected to the fixed base, and the rotating base rotates horizontally relative to the fixed base. The rotating base has a plurality of third insertion holes arranged around its rotation center circumference, and the fixed base has a plurality of third pin holes arranged around its circumference for engaging with the third insertion holes. The third pin, the third insertion holes, and the third pin holes cooperate to limit the rotation of the rotating base.

8. The robotic arm according to claim 6, characterized in that: It also includes a second tilt adjustment assembly, which comprises a fifth lever arm, a first adjusting screw, a second adjusting screw, and an adjusting sleeve. The first end of the fifth lever arm is rotatably connected to the second end of the fourth lever arm, and the second end of the fifth lever arm is the end mount point of the robotic arm. The inner cavity of the adjusting sleeve is provided with a first threaded hole and a second threaded hole, and the threads of the first threaded hole and the second threaded hole are opposite in direction. One end of the first adjusting screw is rotatably connected to the second end of the fourth lever arm, and the other end of the first adjusting screw is threadedly connected to the first threaded hole. One end of the second adjusting screw is rotatably connected to the first end of the fifth lever arm, and the other end of the second adjusting screw is threadedly connected to the second threaded hole.

9. A road sweeper, characterized in that: It includes a cleaning assembly and a robotic arm as described in any one of claims 1-8, wherein the cleaning assembly is mounted at the end mounting point of the robotic arm.

10. The road sweeper according to claim 9, characterized in that: The cleaning assembly includes a rotating brush, a rotating brush drive, and an optional water spray component. The rotating brush drive is connected to the end mounting point of the robotic arm and drives the rotating brush to rotate. The water spray component is fixed in position relative to the rotating brush drive.

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