Main brush lifting system for sweeper

Abstract

The utility model relates to the field of sweeping vehicles, in particular to a main brush lifting system for a sweeping vehicle, which is connected to a chassis of the sweeping vehicle. The main brush lifting system comprises a main brush lifting frame used for being connected with a main brush. The main brush lifting frame is connected with a driving mechanism; the end part of the main brush lifting frame is connected with the chassis through a rotating part; the main brush lifting frame is connected with the main brush through a connecting part; the connecting part and the rotating part are distributed in two areas of the main brush lifting frame; the driving mechanism can drive the main brush lifting frame to drive the main brush to move; the utility model discloses a main brush lifting system for a sweeping vehicle, which is characterized in that a rotating part and a connecting part are arranged in an area, so that a main brush lifting adjusting mechanism is reasonable in structural design, a rotating point and a connecting point are separated, the concentricity is improved, and a main brush works stably, does not jump and is convenient to install.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sweeper, specifically is a main brush lifting system for sweeper. BACKGROUND

[0002] At present, the main brush lifting frame of the main brush structure of the market sweeper is mostly an assembly, the main brush right lifting support and the main brush left lifting lower support are connected and installed on the left and right stand help of the chassis through the key groove connection of a long shaft (500mm-800mm) passing through the rotation point, so that the long shaft is the lifting rotation point and the connection synchronous lifting shaft, due to the size limitation of the bearing, the shaft cannot be thickened, and at the same time, the whole structure is connected by a single point, so that the main brush lifting frame is unstable, the long shaft is easy to twist, the left and right lifting heights are not the same, the main brush is eccentric, and the work shakes.

[0003] And the main brush lifting structure of the existing sweeper mostly adopts a traditional mechanism, because of the instability and poor concentricity of the above structure, the main brush right lifting support and the main brush left lifting lower support installed at the left end need to be respectively pressed by bolts from below, and the height is adjusted by controlling the length of the thread of the adjusting bolt, so that the adjustment needs to use tools, and the two ends are adjusted, the height cannot be controlled, needs to be tested by an angle ruler to determine the center height, is relatively inconvenient, the actual use personnel is required to be too high, and the service life of the accessories is shortened or the cleaning effect is not ideal due to inaccurate adjustment.

[0004] The existing patent 201220687760.0 - a magnetic coupling long-distance high-efficiency transmission robot sweeper does not explicitly disclose the technical content for solving the above technical problems.

[0005] Therefore, in order to improve at least one of the above problems, the existing main brush adjusting structure needs to be optimized and designed. INVENTION CONTENTS

[0006] The utility model aims at providing a main brush lifting system with rotation point and connection point in different positions.

[0007] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0008] A main brush lifting system for sweeper is connected on the chassis of the sweeper; the main brush lifting system comprises a main brush lifting frame for connecting the main brush; the main brush lifting frame is connected with a driving mechanism; the end of the main brush lifting frame is connected with the chassis through a rotating part; the main brush lifting frame is connected with the main brush through a connecting part; the connecting part and the rotating part are distributed in two regions of the main brush lifting frame; and the driving mechanism can drive the main brush lifting frame to move the main brush.

[0009] The rotating part comprises a lifting half shaft, and the end of the main brush lifting frame is connected with the chassis through the lifting half shaft; the lifting half shaft is connected with the base through a bearing; the two ends of the main brush lifting frame are respectively connected with the chassis through a rotating part.

[0010] One end of the main brush is connected with the main brush lifting frame through a connecting part, and the other end of the main brush is connected with the main brush lifting frame through a lifting lower support; the main brush is connected with the lifting half shaft at the end of the main brush lifting frame through the lifting lower support; the connecting part comprises an assembly hole arranged on the main brush lifting frame; the end of the main brush is inserted into the assembly hole.

[0011] The main brush lifting frame comprises a main brush right lifting support, a main brush lifting left upper support and a main brush lifting connecting rod; the main brush right lifting support and the main brush lifting left upper support are connected through the main brush lifting connecting rod; the connecting part is arranged on the main brush right lifting support.

[0012] The main brush lifting left upper support is further provided with a limiting part, and the limiting part comprises a left lower limiting block arranged on the main brush lifting left upper support, and an adjusting bolt is arranged on the left lower limiting block.

[0013] The main brush lifting left upper support is further provided with a guide part, and the guide part comprises a guide hole arranged on the main brush lifting left upper support, and a guide fixing bolt is arranged in the guide hole; an intermediate waist hole is arranged on the lifting lower support; the guide fixing bolt is connected with the guide hole through the intermediate waist hole.

[0014] The driving mechanism is connected with the main brush lifting frame through a connecting rod mechanism;

[0015] The connecting rod mechanism comprises a main brush lifting block arranged on the base, the middle region of the main brush lifting block is movably connected with the base, one end of the main brush lifting block is hingedly connected with the driving mechanism, and the other end of the main brush lifting block is connected with the main brush lifting frame through a main brush lifting suspender, a waist hole is arranged on the main brush lifting suspender, and the main brush lifting frame is connected with the waist hole through a plug-in bolt.

[0016] The main brush lifting frame is connected with the base through a limiting mechanism; the limiting mechanism comprises a main brush lower limiting support, a through waist hole is arranged on the main brush lower limiting support, and the main brush lifting frame is plugged into the through waist hole through a rotating pin shaft; the main brush lower limiting support is movably connected with the base.

[0017] The main brush lower limiting support is connected with the base through an adjusting mechanism; the adjusting mechanism comprises a connecting block arranged on the base and a plug-in bolt plugged into the connecting block.

[0018] The plug-in bolt is connected with the lower limit support of the main brush through a connecting plate, and the connecting plate is hinged with the lower limit support of the main brush; a through hole is arranged on the connecting plate, and a plurality of transverse through holes are arranged on the connecting block; the plug-in bolt passes through the through hole and the corresponding transverse through hole at the same time.

[0019] The lifting half shaft is connected with a torsion spring.

[0020] The utility model discloses the advantages of being:

[0021] The utility model discloses a main brush lifting system for sweeper, the utility model discloses a rotation part and connecting part area setting, make main brush lifting adjustment mechanism structure design reasonable, the utility model discloses a rotation point and connecting point parting, concentricity improves, main brush work stable, no jumping and convenient installation. BRIEF DESCRIPTION OF DRAWINGS

[0022] The following is a brief description of the content expressed by each figure of the utility model specification and the marks in the figure:

[0023] Figure 1 It is the front view of the utility model.

[0024] Figure 2 It is the rear view of the utility model.

[0025] Figure 3 It is the perspective view of the utility model.

[0026] Figure 4 It is Figure 3 The local enlarged view.

[0027] Figure 5 It is the structure schematic view of the main brush lifting frame in the utility model.

[0028] Figure 6 It is the local structure schematic view of the main brush in the utility model and is connected on the chassis through the main brush lifting frame.

[0029] The marks in the above-mentioned figure are:

[0030] 1. chassis, 2. electric push rod, 3. main brush lifting rotating block, 4. main brush lifting boom, 5. limiting mechanism, 6. main brush lifting frame, 7. lifting half shaft, 8. main brush lifting left end cover, 9. main brush right end cover, 10. lifting lower support, 11. main brush, 12. bearing, 13. adjusting bolt, 14. torsion spring. DETAILED DESCRIPTION

[0031] The following compares the figure, and the specific embodiment of the utility model is further explained in detail by the description of the optimal embodiment.

[0032] The utility model discloses a main brush 11 lifting system of sweeper, the main brush 11 lifting system is connected on the chassis 1 of sweeper, the main brush 11 lifting system includes the main brush lifting frame 6 for connecting main brush 11, the main brush lifting frame 6 is connected with drive mechanism, the end of main brush lifting frame 6 is connected with chassis 1 through the rotation part, and the main brush lifting frame 6 is connected with main brush 11 through the connecting part, the connecting part and rotation part are distributed in the two regions of main brush lifting frame 6, and the drive mechanism can drive main brush lifting frame 6 to move with main brush 11, the utility model discloses a main brush 11 lifting system of sweeper, the utility model is through rotation part and the regional setting of connecting part, and the main brush 11 lifting adjustment mechanism structure design is reasonable, the utility model is through the separation of rotation point and connecting point, and the concentricity improves, and the main brush 11 works stably, and there is no bounce and is easy to install.

[0033] The utility model mainly changes the lifting adjustment mechanism of traditional sweeper main brush 11.

[0034] The utility model discloses a lifting system, through the use of main brush lifting frame 6, can guarantee the subsequent connection of main brush 11, and the setting of drive mechanism facilitates the subsequent position control of main brush 11, simultaneously, the rotation part of the utility model is the rotation point when the lifting of main brush 11, and the connecting part is the connecting point of main brush lifting frame 6 and main brush 11, in other words, based on the design, the utility model is through rotation part and the regional setting of connecting part, and the main brush 11 lifting adjustment mechanism structure design is reasonable, the utility model is through the separation of rotation point and connecting point, and the concentricity improves, and the main brush 11 works stably, and there is no bounce and is easy to install.

[0035] Specifically, the main brush 11 lifting system of the utility model is connected on the chassis 1 of sweeper, and is mainly connected on the side of the chassis 1 on both sides, and the main brush 11 lifting system includes the main brush lifting frame 6 for connecting main brush 11, the main brush lifting frame 6 is mainly a connecting frame, facilitating the subsequent installation and arrangement of main brush 11, and facilitating the subsequent position adjustment of main brush 11 by the drive mechanism, and simultaneously, the main brush lifting frame 6 is connected with drive mechanism in the utility model, the end of main brush lifting frame 6 is connected with chassis 1 through the rotation part, and the main brush lifting frame 6 is connected with main brush 11 through the connecting part, and the connecting part and rotation part are distributed in the two regions of main brush lifting frame 6, and the drive mechanism can drive main brush lifting frame 6 to move with main brush 11, the utility model is through rotation part and the regional setting of connecting part, and the main brush 11 lifting adjustment mechanism structure design is reasonable, the utility model is through the separation of rotation point and connecting point, and the concentricity improves, and the main brush 11 works stably, and there is no bounce and is easy to install.

[0036] Further, in the utility model, the rotating part includes the lifting half shaft 7, the main brush lifting frame 6 end is connected with the chassis 1 through the lifting half shaft 7, the lifting half shaft 7 is connected on the base through the bearing 12, the main brush lifting frame 6 two ends are connected with the chassis 1 through a rotating part respectively, based on the above design, the main brush lifting frame 6 two ends are equivalent to fixed connection one lifting half shaft 7, and the lifting half shaft 7 is arranged on the chassis 1 left and right station help through the bearing 12, and the setting is convenient for subsequent use, under the driving of the driving mechanism, the main brush lifting frame 6 can be rotated.

[0037] Further, in the utility model, the main brush 11 one end is connected with the main brush lifting frame 6 through the connecting part, first, the setting of connecting part is convenient for the connection of main brush 11 on the main brush lifting frame 6, and the setting of lifting lower support 10 makes the main brush 11 also be connected on the lifting half shaft 7 at two ends, only one end is connected with one lifting half shaft 7 through the main brush lifting frame 6, and the other end is connected with another lifting half shaft 7 through the lifting lower support 10, and the setting is convenient for the coaxial rotation and arrangement of the two ends of main brush 11.

[0038] Specifically:

[0039] In the utility model, the main brush 11 other end is connected with the main brush lifting frame 6 through the lifting lower support 10, the main brush 11 is connected with the lifting half shaft 7 of the main brush lifting frame 6 end through the lifting lower support 10, the connecting part includes the assembly hole 6.5 arranged on the main brush lifting frame 6, the main brush 11 end is inserted in the assembly hole 6.5, when installing specifically, one end of main brush 11 is inserted in the assembly hole 6.5, the other end is inserted in the hole on the lifting lower support 10, and main brush left end cover 8 and main brush right end cover 9 are respectively arranged at the two ends of main brush 11, and the main brush 11 is installed on main brush left end cover 8 and main brush right end cover 9 through the clamping groove.

[0040] Further, in the utility model, the main brush lifting frame 6 includes the main brush right lifting support 6.3, the main brush lifting left upper support 6.1 and the main brush lifting connecting rod 6.2, the main brush right lifting support 6.3 and the main brush lifting left upper support 6.1 are connected through the main brush lifting connecting rod 6.2, the connecting part is arranged on the main brush right lifting support 6.3, the main brush right lifting support 6.3 and the main brush lifting left upper support 6.1 act as two end plate structures, which facilitates the installation and arrangement of the lifting half shaft 7, the bearing 12 and other components, and the main brush lifting connecting rod 6.2 mainly plays a connecting linkage role, to ensure the linkage of the rotation of the main brush right lifting support 6.3 and the main brush lifting left upper support 6.1.

[0041] Further, the main brush lifting left upper support 6.1 is further provided with a limiting part in the utility model, the limiting part comprises a left lower limiting block 6.4 arranged on the main brush lifting left upper support 6.1, and an adjusting bolt 13 is arranged on the left lower limiting block 6.4; the position of the lifting lower support 10 can be changed by the arrangement of the limiting part; in actual use, the left lower limiting block 6.4 is arranged at the lower end of the main brush lifting left upper support 6.1, the adjusting bolt 13 can be rotated and moved on the left lower limiting block 6.4, and the end of the adjusting bolt 13 is pressed against the lower end of the lifting lower support 10; when the adjusting bolt 13 is installed on the left lower limiting block 6.4 and fixed, the lifting lower support 10 is locked, so that the lifting lower support 10 can not move.

[0042] Further, the main brush lifting left upper support 6.1 is further provided with a guiding part in the utility model, the guiding part comprises a guiding hole arranged on the main brush lifting left upper support 6.1, and a guiding fixed bolt 102 is arranged in the guiding hole; an intermediate waist hole 101 is arranged on the lifting lower support 10; the guiding fixed bolt 102 is connected with the guiding hole by penetrating the intermediate waist hole 101; the guiding part mainly limits the position of the lifting lower support 10, avoids the mutual separation of the lifting lower support 10 and the main brush lifting left upper support 6.1, makes the two have extreme positions of movement, and plays a mutual limiting role.

[0043] Further, the driving mechanism is connected with the main brush lifting frame 6 through a connecting rod mechanism in the utility model; the connecting rod mechanism can avoid interference problems in use while achieving driving; specifically, the connecting rod mechanism comprises a main brush 11 lifting block arranged on the base in the utility model, the main brush 11 lifting block is movably connected to the base in the middle region, one end of the main brush 11 lifting block is hinged to the driving mechanism, and the other end is connected with the main brush lifting frame 6 through a main brush lifting suspender 4; the main brush 11 lifting block cooperates with the main brush lifting suspender 4 in the utility model, and is mainly used for driving the main brush lifting frame 6 to move correspondingly; the main brush lifting frame 6 rotates; meanwhile, the middle part of the main brush 11 lifting block is connected to the stand of the base through a pin shaft in the utility model; the main brush 11 lifting block is an arc block structure, so that when the driving mechanism pulls or pushes the main brush 11 lifting block to rotate, movement interference does not occur, the two ends of the main brush 11 lifting block are required to be hinged to adjacent components, the interference between the main brush 11 lifting block and adjacent components during rotation is reduced, and the main brush lifting suspender plays a bridging role, so that the connection between the main brush 11 lifting block and the main brush lifting frame is facilitated.

[0044] Meanwhile, the waist-shaped hole 41 is arranged on the main brush lifting boom 4, and the main brush lifting frame 6 is connected with the waist-shaped hole through the plug-in bolt 55; the waist-shaped hole 41 is arranged, and the relative position of the main brush lifting boom 4 and the main brush lifting frame can be changed according to the requirement in the subsequent use.

[0045] Further, the main brush lifting frame 6 is connected with the base through the limiting mechanism 5; the limiting mechanism 5 comprises the main brush lower limiting support 51, the waist-shaped hole 52 is arranged on the main brush lower limiting support 51, and the main brush lifting frame 6 is plugged into the waist-shaped hole 52 through the rotating pin shaft; the main brush lower limiting support 51 is movably connected with the base; the limiting mechanism 5 can limit the descending position of the main brush lifting frame 6, so that the main brush is prevented from descending excessively; the main brush lower limiting support 51 is movably connected with the base, so that the main brush lower limiting support 51 can swing and is prevented from interfering with the rotation of the main brush lifting frame 6.

[0046] In addition, the waist-shaped hole 52 is arranged, so that the main brush lifting frame 6 can move relative to the main brush lower limiting support 51 and can also limit the lowest position of the swing of the main brush lifting frame 6.

[0047] Meanwhile, the main brush lower limiting support 51 is connected with the base through the adjusting mechanism; the adjusting mechanism can adjust the relative position of the main brush lower limiting support 51 and the base according to the requirement, and the limiting of the lowest position of the main brush lifting frame 6 during the rotation of the main brush lifting frame 6 can be realized based on the change of the position of the main brush lower limiting support 51.

[0048] In the utility model, the adjusting mechanism includes the connecting block 53 arranged on the base and the plug bolt 55 plugged on the connecting block 53; the connecting block 53 is fixed on the base; meanwhile the connecting block 53 is a U-shaped structure in a horizontal projection, mainly including a base plate and two side plates, and the main brush lower limiting support 51 is connected with the connecting block 53 through the plug bolt 55, which is convenient for installation and avoids installation interference, and the plug bolt 55 in the utility model is connected with the main brush lower limiting support 51 through the connecting plate 54, and the connecting plate 54 is hinged with the main brush lower limiting support 51; the connecting plate 54 is provided with a through hole, and the connecting block 53 is provided with a plurality of transverse through holes 531; the plug bolt 55 passes through the through hole and the corresponding transverse through hole 531; the transverse through hole 531 is arranged on the side plate, and a plurality of transverse through holes 531 are arranged on each side plate and arranged longitudinally; in subsequent use, the main brush lower limiting support 51 is connected with the plug bolt 55 through the connecting plate 54, the connecting plate 54 is sleeved on the plug bolt 55 through the through hole, and the plug bolt 55 is connected with the main brush lower limiting support 51 through the connecting plate 54; the connecting plate 54 is hinged with the main brush lower limiting support 51; based on the arrangement, the plug bolt 55 is plugged in different transverse through holes 531 in subsequent use, and the installation position of the main brush lower limiting support 51 on the base can be adjusted as required.

[0049] Further, the lifting half shaft 7 is connected with a torsional spring 14 in the utility model; the torsional spring 14 can provide a driving force for the lifting half shaft 7, so that the main brush lifting frame 6 tends to rotate towards the ground, thereby enabling the main brush 11 to be stable after being lowered in subsequent use and not to jump.

[0050] Meanwhile, the driving system can be the electric push rod 2, or an electric cylinder, a hydraulic cylinder or the like. Specific embodiments:

[0052] The utility model discloses a main brush 11 lifting system for sweeper.

[0053] Mainly include chassis 1, electric push rod 2, main brush lifting swing block 3, main brush lifting boom 4, main brush lower limiting support 51, main brush lifting frame 6, lifting half shaft 7, main brush left end cover 8, main brush right end cover 9, lifting lower support 10, main brush 11, UC bearing 12, adjusting bolt 13.

[0054] The electric push rod 2 is installed below the chassis 1 by bolts, the main brush lifting rotating block 3 is fixed on the right station of the chassis 1 by bolts, one end of the main brush lifting rotating block 3 is connected with the electric push rod 2, the other end is connected with the main brush lifting boom 4, the left end of the main brush right lifting support 6.3 is connected with the main brush lower limiting support 51, the main brush lifting frame 6 is installed on the chassis 1 through the left and right lifting half shafts 7 and the UC bearing 12, the main brush 11 lifting half shaft 7 is installed in the main brush lifting frame 6 left and right mounting hole positions through bolts, and rotates in a certain range through the UC bearing 12; the main brush left end cover 8 and the main brush right end cover 9 are installed on the left and right ends of the main brush lifting frame 6 and are coaxial with the shaft, the main brush 11 is installed on the main brush left end cover 8 and the main brush right end cover 9 through the clamping groove; the lifting lower support 10 is sleeved on one lifting half shaft 7, is fixed with the main brush lifting frame 6 through bolts in the middle, and the balance position can be adjusted through the middle waist hole 101, the adjusting bolt 13 is installed on the lower left limiting block 6.4, after the position is fixed, the adjusting bolt 13 is locked against the lifting lower support 10, so that the lifting lower support 10 is prevented from moving, and the pressure torsion spring 14 can stabilize the main brush 11 after falling down and prevent the main brush 11 from jumping.

[0055] Working principle: lifting principle: when the sweeper works, the electric push rod 2 is electrified to work, the front end of the push rod is retracted along B, the main brush lifting frame 6 (under the action of the thrust, taking A point where the main brush 11 lifting half shaft 7 axis is as the center, rotates and falls along C, so that the main brush 11 falls to the working ground, after the electric push rod 2 is completely retracted, the lower limit of the main brush lifting frame 6 is limited by the bolt on the lower left limiting block 6.4.

[0056] When the sweeper stops working, the main brush 11 is lifted, and vice versa.

[0057] Advantages: the main brush 11 structure of the current market sweeper is that the main brush lifting frame 6 is an assembled part, the main brush 11 left lifting support and the main brush 11 right lifting support are connected and installed on the left and right stations of the chassis 1 through long shafts passing through rotating points and clamping grooves, so that the long shafts are both lifting rotating points and connecting synchronous lifting shafts, due to the size limitation of the bearing 12, the shaft cannot be thickened, and at the same time, the whole structure is connected by only a single point, so that the main brush lifting frame 6 is unstable, the long shafts are prone to twist, the left and right lifting heights are not the same, the main brush 11 is eccentric, and the working vibration is caused; the structure separates the rotating point from the connecting point, the connecting point is welded by a φ32mm round pipe, and is then installed on the left and right stations of the chassis 1 through the main brush 11 lifting half shaft 7, so that the structure strength of the main brush lifting frame 6 is greatly increased, the concentricity is improved, the main brush 11 works stably, the jumping is avoided, the installation is convenient, the clamping groove connection is reduced, the processing technology is simplified, and the pressure torsion spring 14 is more stable than the conventional model pressure mode.

[0058] Obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, and various non-essential improvements made by adopting the method concept and technical scheme of the utility model are within the protection scope of the utility model.

Claims

1. A main brush lifting system for a sweeping vehicle, the main brush lifting system being connected to a chassis of the sweeping vehicle; characterized in that ； The main brush lifting system comprises a main brush lifting frame for connecting the main brush; the main brush lifting frame is connected with a driving mechanism; The end of the main brush lifting frame is connected with the base through a rotating part; The main brush lifting frame is connected with the main brush through a connecting part; The connecting part and the rotating part are distributed in two regions of the main brush lifting frame; The driving mechanism can drive the main brush lifting frame to move the main brush.

2. The main brush lifting system for a sweeping vehicle according to claim 1, characterized in that, The rotating part comprises a lifting half shaft, the end of the main brush lifting frame is connected with the base through the lifting half shaft; the lifting half shaft is connected with the base through a bearing; the two ends of the main brush lifting frame are respectively connected with the base through a rotating part.

3. The main brush lifting system for a sweeping vehicle according to claim 2, characterized in that, One end of the main brush is connected with the main brush lifting frame through a connecting part, the other end of the main brush is connected with the main brush lifting frame through a lifting lower support; the main brush is connected with the lifting half shaft at the end of the main brush lifting frame through the lifting lower support; the connecting part comprises an assembly hole arranged on the main brush lifting frame; the end of the main brush is inserted into the assembly hole.

4. The main brush lifting system for a sweeping vehicle according to claim 3, characterized in that, The main brush lifting frame comprises a main brush right lifting support, a main brush lifting left upper support and a main brush lifting connecting rod; the main brush right lifting support and the main brush lifting left upper support are connected through the main brush lifting connecting rod; the connecting part is arranged on the main brush right lifting support.

5. The main brush lifting system for a sweeping vehicle according to claim 4, characterized in that, The main brush lifting left upper support is further provided with a limiting part, the limiting part comprises a left lower limiting block arranged on the main brush lifting left upper support, and an adjusting bolt is arranged on the left lower limiting block.

6. The main brush lifting system for a sweeping vehicle according to claim 5, wherein The main brush lifting left upper support is further provided with a guide part, the guide part comprises a guide hole arranged on the main brush lifting left upper support, and a guide fixing bolt is arranged in the guide hole; an intermediate waist hole is arranged on the lifting lower support; the guide fixing bolt is connected with the guide hole through the intermediate waist hole.

7. The main brush lifting system for a sweeping vehicle according to claim 1, wherein The driving mechanism is connected with the main brush lifting frame through a connecting rod mechanism; The connecting rod mechanism comprises a main brush lifting block arranged on the base, the middle region of the main brush lifting block is movably connected with the base, one end of the main brush lifting block is hingedly connected with the driving mechanism, and the other end of the main brush lifting block is connected with the main brush lifting frame through a main brush lifting suspender, a waist hole is arranged on the main brush lifting suspender, and the main brush lifting frame is connected with the waist hole through a plug-in bolt.

8. The main brush lifting system for a sweeping vehicle according to claim 4, wherein The main brush lifting frame is connected with the base through a limiting mechanism; the limiting mechanism comprises a main brush lower limiting support, a through waist hole is arranged on the main brush lower limiting support, the main brush lifting frame is plugged into the through waist hole through a rotating pin, and the main brush lower limiting support is movably connected with the base.

9. The main brush lifting system for a sweeping vehicle according to claim 8, wherein The main brush lower limiting support is connected with the base through an adjusting mechanism; the adjusting mechanism comprises a connecting block arranged on the base and a plug-in bolt plugged into the connecting block; the plug-in bolt is connected with the main brush lower limiting support through a connecting plate, the connecting plate is hingedly connected with the main brush lower limiting support, a through hole is arranged on the connecting plate, a plurality of transverse through holes are arranged on the connecting block, and the plug-in bolt passes through the through hole and the corresponding transverse through hole at the same time.

10. The main brush lifting system for a sweeping vehicle according to claim 2, wherein The lifting half shaft is connected with a torsional spring.

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