Manual spraying support arm

Abstract

The utility model discloses a manual spraying support arm, which belongs to the field of spraying equipment and comprises a walking base, a support arm, a telescopic arm, a telescopic driving component and a paint spraying component. The supporting arm is rotationally connected to the walking base, the length of the supporting arm is adjustable, the middle of the telescopic arm is movably connected to the end, away from the walking base, of the supporting arm, the telescopic arm is telescopic, and the telescopic driving assembly is connected with the telescopic arm and used for driving the telescopic arm to stretch out and draw back. The paint spraying assembly comprises a paint spraying machine, a first pipeline, a paint spraying switch, a second pipeline and a paint spraying head which are sequentially connected, the paint spraying machine is installed on the walking base, the paint spraying switch is installed at one end of the telescopic arm, and the paint spraying head is installed at the other end of the telescopic arm. According to the manual spraying support arm, leftward or rightward rotating spraying can be achieved, spraying from far to near or from near to far can be achieved, the spraying range is wide, and applicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying equipment, in particular to an artificial spraying arm. Background Art

[0002] Spraying devices are widely used. The patent text with the patent number 201811050733.0 discloses a spraying device for decoration, which includes a spraying device body. The spraying device body is composed of a moving mechanism, a rotating mechanism, a lifting mechanism, an adjusting mechanism, a self-locking wheel base, a spraying machine and a support plate. A moving mechanism is arranged inside the base. The top of the moving mechanism is fixedly connected with a support plate. One end of the top of the support plate is fixedly connected with a rotating mechanism. The other end of the top of the support plate is fixedly connected with a spraying machine. The top of the rotating mechanism is fixedly connected with a lifting mechanism. The side of the lifting mechanism is fixedly connected with an adjusting mechanism. By setting the lifting mechanism, the height of the spraying head can be adjusted, which is convenient for the spraying head to spray at high places. By setting the adjusting mechanism, the direction of the spraying head can be adjusted, which is convenient for spraying in all directions. However, for this spraying device, when the bottom moving mechanism is fixed, the spraying head cannot be adjusted in the front and back positions, and the adjusting mechanism cannot adjust the left and right directions of the spraying head. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides an artificial spraying arm, which can rotate left or right for spraying, spray from far to near or from near to far, with a wide spraying range and strong applicability.

[0004] The artificial spraying arm according to an embodiment of the utility model includes:

[0005] A walking base;

[0006] A support arm, rotatably connected to the walking base, and the length of the support arm is adjustable;

[0007] A telescopic arm, the middle of the telescopic arm is movably connected to one end of the support arm far from the walking base, and the telescopic arm is telescopically arranged;

[0008] A telescopic driving assembly, connected to the telescopic arm, and the telescopic driving assembly is used to drive the telescopic arm to extend and retract;

[0009] A spraying assembly, including a spraying machine, a first pipeline, a spraying switch, a second pipeline and a spraying head connected in sequence. The spraying machine is installed on the walking base, the spraying switch is installed at one end of the telescopic arm, and the spraying head is installed at the other end of the telescopic arm.

[0010] The artificial spraying arm according to an embodiment of the utility model has at least the following beneficial effects:

[0011] The operator can operate the paint spraying switch to transfer the paint in the paint spraying machine to the paint spraying head through the first pipeline and the second pipeline for spraying. The telescopic driving assembly controls the telescopic movement of the telescopic arm, thereby driving the paint spraying head to extend and retract back and forth. The operator can also operate the telescopic arm to swing left and right on the support arm, thereby driving the paint spraying head to swing left and right, realizing spraying by turning left or right, spraying from far to near or from near to far. The spraying range is wide and the applicability is strong.

[0012] According to some embodiments of the present invention, the support arm includes a spherical bearing and a support rod. The telescopic arm is inserted into the inner ring of the spherical bearing. The support rod is rotatably connected to the traveling base. A threaded hole is provided on the support rod. The spherical bearing has a threaded portion, and the threaded portion is threadedly connected to the threaded hole in a matching manner.

[0013] According to some embodiments of the present invention, a fixed bracket is provided on the traveling base. A bearing is provided at one end of the fixed bracket away from the traveling base. The lower end of the support arm is inserted into the inner ring of the bearing.

[0014] According to some embodiments of the present invention, the telescopic arm includes a connecting pipe, a first sleeve, a second sleeve and a third sleeve connected in sequence. The connecting pipe is connected to one end of the first sleeve. The connecting pipe is movably connected to the support arm. The second sleeve is slidably inserted into the first sleeve, and the third sleeve is slidably inserted into the second sleeve.

[0015] According to some embodiments of the present invention, the connecting pipe is fixedly connected to the first sleeve. The cross sections of the first sleeve, the second sleeve and the third sleeve are polygonal. The telescopic driving assembly includes a screw rod, a driving nut and a handwheel. The screw rod is inserted through the connecting pipe, the first sleeve, the second sleeve and the third sleeve. The driving nut is threadedly connected to the screw rod. The driving nut is connected to one end of the third sleeve away from the connecting pipe. The handwheel is connected to one end of the screw rod close to the connecting pipe. The handwheel is used to drive the driving nut to move through the screw rod to drive the telescopic arm to extend and retract.

[0016] According to some embodiments of the present invention, a first fixing ring is detachably connected to the inner wall of one end of the connecting pipe away from the first sleeve. A second fixing ring is detachably connected to the inner arm of one end of the first sleeve close to the connecting pipe. A third fixing ring is detachably connected to the inner arm of one end of the second sleeve close to the connecting pipe. A fourth fixing ring is detachably connected to the inner arm of one end of the third sleeve close to the connecting pipe. The screw rod is inserted through the first fixing ring, the second fixing ring, the third fixing ring and the fourth fixing ring;

[0017] A first limiting ring, a second limiting ring and a third limiting ring are detachably connected to the screw. The first limiting ring is connected to one end of the screw extending out of the third sleeve. The second limiting ring is located inside the connecting pipe. The first fixing ring is located between the second limiting ring and the third limiting ring. The second limiting ring, the first fixing ring and the third limiting ring are arranged at intervals.

[0018] According to some embodiments of the present invention, a first limiting block is detachably connected to the inner wall of one end of the first sleeve away from the connecting pipe, and a second limiting block is arranged on the outer wall of one end of the second sleeve close to the connecting pipe. The second limiting block is located inside the first sleeve. When the length of the end of the second sleeve away from the connecting pipe extending out of the first sleeve is the largest, the first limiting block abuts against the second limiting block.

[0019] A third limiting block is arranged on the inner wall of the end of the second sleeve away from the connecting pipe, and a fourth limiting block is arranged on the outer wall of the end of the third sleeve close to the connecting pipe. The fourth limiting block is located inside the second sleeve. When the length of the end of the third sleeve away from the connecting pipe extending out of the second sleeve is the largest, the third limiting block abuts against the fourth limiting block.

[0020] According to some embodiments of the present invention, one end of the telescopic arm is connected with an operation handle. The operation handle is in an arcuate shape. The middle part of the operation handle is detachably connected to the telescopic arm. The paint spraying switch is detachably connected to the operation handle. The operation handle is used to operate the telescopic arm to swing up, down, left and right.

[0021] According to some embodiments of the present invention, the second pipe is slidably connected to the telescopic arm through a connecting sleeve. The connecting sleeve includes a sleeve frame and a sleeve ring. The sleeve frame is slidably connected to the telescopic arm. A roller is sleeved on the sleeve frame. The roller abuts against the telescopic arm. The sleeve ring is rotatably connected to the sleeve frame. The second pipe passes through the sleeve ring.

[0022] According to some embodiments of the present invention, universal rollers are arranged below the walking base, and a handle is arranged on the walking base.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description. Description of the Drawings

[0024] The following further describes the present invention with reference to the drawings and embodiments, where:

[0025] Figure 1 is a schematic structural diagram of the manual spraying support arm according to the embodiment of the present invention;

[0026] Figure 2 is Figure 1 an enlarged view of part A in

[0027] Figure 3 is Figure 1 an enlarged view of part B in

[0028] Figure 4 is a cross-sectional view of the first sleeve, the second sleeve, and the third sleeve of the manual spraying boom according to an embodiment of the present utility model;

[0029] Figure 5 is a schematic connection structure view of the operation handle, the connecting pipe, and the paint spraying switch of the manual spraying boom according to an embodiment of the present utility model;

[0030] Figure 6 is a schematic structure view of the connecting sleeve of the manual spraying boom according to an embodiment of the present utility model;

[0031] Figure 7 is a top view of the base of the manual spraying boom according to an embodiment of the present utility model.

[0032] Reference numerals:

[0033] 100, traveling base; 110, fixed bracket; 111, bearing; 120, universal roller; 130, handle; 140, support seat; 150, leg;

[0034] 200, support arm; 210, ball eye bearing; 211, threaded portion; 220, support rod; 221, threaded hole;

[0035] 300, telescopic arm; 310, connecting pipe; 311, first fixing ring; 312, fourth limiting ring; 313, fifth limiting ring; 320, first sleeve; 321, second fixing ring; 322, first limiting block; 330, second sleeve; 331, third fixing ring; 332, second limiting block; 333, third limiting block; 340, third sleeve; 341, fourth fixing ring; 342, fourth limiting block;

[0036] 400, telescopic drive assembly; 410, screw; 411, first limiting ring; 412, second limiting ring; 413, third limiting ring; 420, drive nut; 430, handwheel;

[0037] 500, paint spraying assembly; 510, paint spraying machine; 520, first pipeline; 530, paint spraying switch; 540, second pipeline; 550, paint spraying head; 560, connecting sleeve; 561, sleeve frame; 5611, roller; 562, sleeve ring;

[0038] 600, operation handle; 610, first handle; 620, second handle. Detailed implementation manners

[0039] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0041] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] Please refer to Figure 1 、 Figure 2 and Figure 3, the manual spraying arm of the embodiment of the utility model comprises a traveling base 100, a support arm 200, a telescopic arm 300, a telescopic driving assembly 400 and a painting assembly 500. The support arm 200 is rotatably connected to the traveling base 100, and the length of the support arm 200 is adjustable. The middle part of the telescopic arm 300 is movably connected to one end of the support arm 200 far away from the traveling base 100, and the telescopic arm 300 is telescopic. The telescopic driving assembly 400 is connected to the telescopic arm 300, and the telescopic driving assembly 400 is used for driving the telescopic arm 300 to stretch. The painting assembly 500 comprises a painting machine 510, a first pipeline 520, a painting switch 530, a second pipeline 540 and a painting head 550 which are connected in sequence. The painting machine 510 is installed on the traveling base 100, the painting switch 530 is installed at one end of the telescopic arm 300, and the painting head 550 is installed at the other end of the telescopic arm 300.

[0043] An operator can operate the painting switch 530, and transfer the paint in the painting machine 510 to the painting head 550 through the first pipeline 520 and the second pipeline 540 for spraying. The telescopic driving assembly 400 controls the telescopic movement of the telescopic arm 300, and then drives the painting head 550 to stretch back and forth. The telescopic arm 300 can be operated to swing left and right on the support arm 200, and then drive the painting head 550 to swing left and right, so as to realize spraying by turning left or right, spraying from far to near or from near to far. The spraying range is wide and the applicability is strong.

[0044] In some embodiments, referring to Figure 1 and Figure 3 , the support arm 200 comprises a ball eye bearing 210 and a support rod 220, and the telescopic arm 300 passes through the inner ring of the ball eye bearing 210. The telescopic arm 300 passes through the ball eye bearing 210, so that the telescopic arm 300 can swing up, down, left and right. The spraying range is wide and the applicability is strong. The support rod 220 is rotatably connected to the traveling base 100, so that the telescopic arm 300 can swing left and right. A threaded hole 221 is arranged on the support rod 220, and the ball eye bearing 210 has a threaded portion 211, and the threaded portion 211 is in threaded connection with the threaded hole 221 in a matching manner. By rotating the ball eye bearing 210 around the axis of the threaded portion 211, the length of the upper end of the ball eye bearing 210 extending out of the support rod 220 can be adjusted, and then the length of the support arm 200 can be adjusted. After the length of the ball eye bearing 210 extending out of the support rod 220 is adjusted in place, the position of the ball eye bearing 210 can also be fixed by using a locking nut.

[0045] A fourth limiting ring 312 and a fifth limiting ring 313 are arranged on the telescopic arm 300, the ball eye bearing 210 is arranged between the fourth limiting ring 312 and the fifth limiting ring 313, and the fourth limiting ring 312, the ball eye bearing 210 and the fifth limiting ring 313 are arranged at intervals. The arrangement of the fourth limiting ring 312 and the fifth limiting ring 313 can limit the moving range of the ball eye bearing 210 on the support arm 200.

[0046] In some embodiments, referring to Figure 1 , a fixed bracket 110 is provided on the walking base 100. One end of the fixed bracket 110 away from the walking base 100 is provided with a bearing 111, and the lower end of the support arm 200 is inserted through the inner ring of the bearing 111. The lower end of the support arm 200 is connected to the bearing 111 on the fixed bracket 110, making the rotation of the support arm 200 smoother.

[0047] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3 , the telescopic arm 300 includes a connecting pipe 310, a first sleeve 320, a second sleeve 330, and a third sleeve 340 that are connected in sequence. The connecting pipe 310 is connected to one end of the first sleeve 320, and the connecting pipe 310 and the first sleeve 320 can be fixedly connected by welding. The connecting pipe 310 is movably connected to the support arm 200. The second sleeve 330 is slidably inserted through the first sleeve 320, and the third sleeve 340 is slidably inserted through the second sleeve 330. The first sleeve 320, the second sleeve 330, and the third sleeve 340 are slidably connected in sequence, enabling the telescopic arm 300 to extend or contract, thereby driving the front and rear positions of the paint spraying head 550 to change, with a wide spraying range and strong applicability.

[0048] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3 , the connecting pipe 310 is fixedly connected to the first sleeve 320. Referring to Figure 4 , the cross-sections of the first sleeve 320, the second sleeve 330, and the third sleeve 340 are polygonal, such that the second sleeve 330 and the third sleeve 340 can only expand and contract and cannot rotate. The telescopic drive assembly 400 includes a screw rod 410, a drive nut 420, and a handwheel 430. The screw rod 410 is inserted through the connecting pipe 310, the first sleeve 320, the second sleeve 330, and the third sleeve 340. The drive nut 420 is threadedly connected to the screw rod 410, and the drive nut 420 is connected to one end of the third sleeve 340 away from the connecting pipe 310. The handwheel 430 is connected to one end of the screw rod 410 close to the connecting pipe 310. The handwheel 430 is used to drive the drive nut 420 to move through the screw rod 410 to drive the telescopic arm 300 to expand and contract. The drive nut 420 is connected to the third sleeve 340, and the third sleeve 340 cannot rotate relative to the connecting pipe 310, so the drive nut 420 cannot rotate. An operator rotates the handwheel 430 to drive the screw rod 410 to rotate, driving the drive nut 420 to move back and forth, thereby driving the third sleeve 340 to expand and contract and driving the paint spraying head 550 to move back and forth.

[0049] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3, a first fixing ring 311 is detachably connected to the inner wall of the end of the connecting pipe 310 away from the first sleeve 320, and the first fixing ring 311 is connected to the inner wall of the connecting pipe 310 by screws. A second fixing ring 321 is detachably connected to the inner arm of the end of the first sleeve 320 close to the connecting pipe 310, and the second fixing ring 321 is connected to the inner wall of the first sleeve 320 by screws. A third fixing ring 331 is detachably connected to the inner arm of the end of the second sleeve 330 close to the connecting pipe 310, and the third fixing ring 331 is connected to the second sleeve 330 by screws. A fourth fixing ring 341 is detachably connected to the inner arm of the end of the third sleeve 340 close to the connecting pipe 310, and the fourth fixing ring 341 is connected to the third sleeve 340 by screws. The screw rod 410 passes through the first fixing ring 311, the second fixing ring 321, the third fixing ring 331 and the fourth fixing ring 341. The first fixing ring 311, the second fixing ring 321, the third fixing ring 331 and the fourth fixing ring 341 are provided to increase the strength of the telescopic arm 300.

[0050] A first limiting ring 411, a second limiting ring 412 and a third limiting ring 413 are detachably connected to the screw rod 410. The first limiting ring 411 is connected to the end of the screw rod 410 extending out of the third sleeve 340. The second limiting ring 412 is located inside the connecting pipe 310. The first fixing ring 311 is located between the second limiting ring 412 and the third limiting ring 413. The second limiting ring 412, the first fixing ring 311 and the third limiting ring 413 are arranged at intervals.

[0051] The first limiting ring 411, the second limiting ring 412 and the third limiting ring 413 can be nuts with pin holes. After the first limiting ring 411 is connected to one end of the screw rod 410, it is restricted on the screw rod 410 by using a pin; after the second limiting ring 412 and the third limiting ring 413 are adjusted to the specified positions, they are restricted on the screw rod 410 by using pins. The first limiting ring 411 can limit the driving nut 420 to prevent the driving nut 420 from disengaging from the screw rod 410. The second limiting ring 412 and the third limiting ring 413 cooperate with the first fixing ring 311 to limit the screw rod 410, ensuring that during the rotation of the handwheel 430, the screw rod 410 will not move back and forth relative to the connecting pipe 310, ensuring that the screw rod 410 can smoothly drive the driving nut 420 to move back and forth, thereby driving the third sleeve 340 and the second sleeve 330 to expand and contract back and forth, and driving the paint spraying head 550 to move back and forth.

[0052] In some embodiments, refer to Figure 1 、 Figure 2 and Figure 3, a first limiting block 322 is detachably connected to the inner wall of one end of the first sleeve 320 away from the connecting pipe 310, and a second limiting block 332 is provided on the outer wall of one end of the second sleeve 330 close to the connecting pipe 310. The second limiting block 332 is located inside the first sleeve 320. When the length of the end of the second sleeve 330 away from the connecting pipe 310 extending out of the first sleeve 320 is the largest, the first limiting block 322 abuts against the second limiting block 332. The first limiting block 322 is connected to the inner wall of the first sleeve 320 by screws, and the second limiting block 332 is connected to the outer wall of the second sleeve 330 by screws. The first limiting block 322 and the second limiting block 332 are provided to ensure the structural stability of the telescopic arm 300 and prevent the second sleeve 330 from slipping out of the first sleeve 320 during the telescopic process of the telescopic arm 300.

[0053] A third limiting block 333 is provided on the inner wall of one end of the second sleeve 330 away from the connecting pipe 310, and a fourth limiting block 342 is provided on the outer wall of one end of the third sleeve 340 close to the connecting pipe 310. The fourth limiting block 342 is located inside the second sleeve 330. When the length of the end of the third sleeve 340 away from the connecting pipe 310 extending out of the second sleeve 330 is the largest, the third limiting block 333 abuts against the fourth limiting block 342. The third limiting block 333 is connected to the inner wall of the second sleeve 330 by screws, and the fourth limiting block 342 is connected to the outer wall of the third sleeve 340 by screws. The third limiting block 333 and the fourth limiting block 342 are provided to ensure the structural stability of the telescopic arm 300 and prevent the third sleeve 340 from slipping out of the second sleeve 330 during the telescopic process of the telescopic arm 300.

[0054] In some embodiments, referring to Figure 1 , Figure 3 and Figure 5 , one end of the telescopic arm 300 is connected with an operating handle 600, and the operating handle 600 is arranged in an arc shape. The middle part of the operating handle 600 is detachably connected to the telescopic arm 300, and the paint spraying switch 530 is detachably connected to the operating handle 600. The operating handle 600 is used to operate the telescopic arm 300 to swing up, down, left and right. The operating handle 600 includes a first handle 610 and a second handle 620. The first handle 610 and the second handle 620 are connected by bolts, and the paint spraying switch 530 is connected to the first handle 610 by a hoop. During operation, the operator holds the first handle 610 to control the left and right swing of the telescopic arm 300, and at the same time can operate the paint spraying switch 530 to control the paint spraying.

[0055] In some embodiments, referring to Figure 1 and Figure 6, the second pipeline 540 is slidably connected to the telescopic arm 300 through a connecting sleeve 560. The connecting sleeve 560 includes a sleeve frame 561 and a collar 562. The sleeve frame 561 is slidably connected to the telescopic arm 300. A roller 5611 is sleeved on the sleeve frame 561. The roller 5611 abuts against the telescopic arm 300. The roller 5611 can reduce the friction between the sleeve frame 561 and the telescopic arm 300. The collar 562 is rotatably connected to the sleeve frame 561. The second pipeline 540 passes through the collar 562. The sleeve frame 561 is slidably connected to the telescopic arm 300, so that during the telescopic process of the telescopic arm 300, the friction between the sleeve frame 561 and the telescopic arm 300 is small.

[0056] In some embodiments, referring to Figure 1 and Figure 7 , universal rollers 120 are provided below the walking base 100, and a handle 130 is provided on the walking base 100. The walking base 100 includes a support base 140 and legs 150. The legs 150 are connected to the support base 140. The universal rollers 120 are provided below the legs 150. The handle 130 facilitates pushing the walking chassis to move. The handle 130 is detachably connected to the support base 140.

[0057] In the description of this specification, the descriptions of reference terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0058] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that: various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An artificial spraying arm, characterized in that, Comprising: A walking base; A support arm rotatably connected to the walking base, the length of the support arm being adjustable; A telescopic arm, the middle of the telescopic arm being movably connected to the end of the support arm away from the walking base, the telescopic arm being telescopically adjustable; A telescopic driving assembly connected to the telescopic arm, the telescopic driving assembly being used to drive the telescopic arm to extend and retract; A painting assembly, including a paint spraying machine, a first pipeline, a paint spraying switch, a second pipeline and a paint spraying head connected in sequence. The paint spraying machine is installed on the walking base, the paint spraying switch is installed at one end of the telescopic arm, and the paint spraying head is installed at the other end of the telescopic arm.

2. The manual spraying boom according to claim 1, wherein, The support arm includes a ball eye bearing and a support rod. The telescopic arm passes through the inner ring of the ball eye bearing. The support rod is rotatably connected to the walking base. A threaded hole is provided on the support rod. The ball eye bearing has a threaded portion, and the threaded portion is threadedly connected to the threaded hole in a matching manner.

3. The manual spraying boom according to claim 1, wherein, A fixed bracket is provided on the walking base. A bearing is provided at the end of the fixed bracket away from the walking base. The lower end of the support arm passes through the inner ring of the bearing.

4. The manual spraying boom according to claim 1, wherein The telescopic arm includes a connecting pipe, a first sleeve, a second sleeve and a third sleeve connected in sequence. The connecting pipe is connected to one end of the first sleeve. The connecting pipe is movably connected to the support arm. The second sleeve slidably passes through the first sleeve, and the third sleeve slidably passes through the second sleeve.

5. The manual spraying boom according to claim 4, characterized in that, The connecting pipe is fixedly connected to the first sleeve. The cross-sections of the first sleeve, the second sleeve and the third sleeve are polygonal. The telescopic driving assembly includes a screw rod, a driving nut and a hand wheel. The screw rod passes through the connecting pipe, the first sleeve, the second sleeve and the third sleeve. The driving nut is threadedly connected to the screw rod. The driving nut is connected to the end of the third sleeve away from the connecting pipe. The hand wheel is connected to the end of the screw rod close to the connecting pipe. The hand wheel is used to drive the driving nut to move through the screw rod to drive the telescopic arm to extend and retract.

6. The manual spraying boom according to claim 5, characterized in that, A first fixing ring is detachably connected to the inner wall of the end of the connecting pipe away from the first sleeve. A second fixing ring is detachably connected to the inner wall of the end of the first sleeve close to the connecting pipe. A third fixing ring is detachably connected to the inner wall of the end of the second sleeve close to the connecting pipe. A fourth fixing ring is detachably connected to the inner wall of the end of the third sleeve close to the connecting pipe. The screw rod passes through the first fixing ring, the second fixing ring, the third fixing ring and the fourth fixing ring; A first limiting ring, a second limiting ring and a third limiting ring are detachably connected to the screw rod. The first limiting ring is connected to the end of the screw rod extending out of the third sleeve. The second limiting ring is located inside the connecting pipe. The first fixing ring is located between the second limiting ring and the third limiting ring. The second limiting ring, the first fixing ring and the third limiting ring are arranged at intervals.

7. The manual spraying boom according to claim 4, wherein A first limiting block is detachably connected to the inner wall of one end of the first sleeve away from the connecting pipe. A second limiting block is provided on the outer wall of one end of the second sleeve close to the connecting pipe. The second limiting block is located inside the first sleeve. When the length of the end of the second sleeve away from the connecting pipe extending out of the first sleeve is at its maximum, the first limiting block abuts against the second limiting block. A third limiting block is provided on the inner wall of one end of the second sleeve away from the connecting pipe. A fourth limiting block is provided on the outer wall of one end of the third sleeve close to the connecting pipe. The fourth limiting block is located inside the second sleeve. When the length of the end of the third sleeve away from the connecting pipe extending out of the second sleeve is at its maximum, the third limiting block abuts against the fourth limiting block.

8. The manual spraying boom according to claim 1, wherein One end of the telescopic arm is connected with an operating handle. The operating handle is in an arcuate shape. The middle part of the operating handle is detachably connected to the telescopic arm. The paint spraying switch is detachably connected to the operating handle. The operating handle is used to operate the telescopic arm to swing up, down, left and right.

9. The manual spraying boom according to claim 1, wherein, The second pipe is slidably connected to the telescopic arm through a connecting sleeve. The connecting sleeve includes a sleeve frame and a sleeve ring. The sleeve frame is slidably connected to the telescopic arm. A roller is sleeved on the sleeve frame. The roller abuts against the telescopic arm. The sleeve ring is rotatably connected to the sleeve frame. The second pipe passes through the sleeve ring.

10. The manual spraying boom according to claim 1, wherein, Universal rollers are provided below the walking base. A handle is provided on the walking base.

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