Hydraulic Pump Driving Device for a Pure Electric Road Sweeper

Abstract

The present invention discloses a hydraulic pump driving device for a pure electric sweeper, comprising: a bearing seat, on which a driving shaft is rotatably installed by mounting bearings, and the driving shaft is driven by a corresponding driving motor; a hydraulic pump, fixedly installed on the outer side of the driving shaft, a plug hole is provided at the end of the driving shaft, and a plurality of limiting grooves are arranged at intervals on the plug hole, a fixing key is arranged on the transmission shaft of the hydraulic pump, and elastic compression members are respectively fixedly sleeved on the outer side of the fixing key, and the transmission shaft of the hydraulic pump is fixedly inserted into the plug hole of the driving shaft by the cooperation of the fixing key and the limiting grooves; a fixed connection mechanism, which includes a driving nut screwed inside the transmission shaft of the hydraulic pump and a fixing plate, and docking holes are respectively arranged on the fixing plate. The present invention can directly transmit and connect the transmission shaft of the hydraulic pump to the driving shaft, thereby effectively and greatly improving the structural simplicity of the equipment and facilitating the installation operation of the equipment.

Description

Technical Field

[0001] The present invention relates to a hydraulic pump driving device, specifically a hydraulic pump driving device for a pure electric sweeper truck. Background Art

[0002] Currently, in the sanitation vehicle industry, for key components such as the broom disc, suction nozzle, and box body of a pure electric sweeper truck, power is provided by a hydraulic pump. The traditional driving method for the hydraulic pump of a pure electric sweeper truck is to directly drive it with a separate motor, which will increase the vehicle's overall manufacturing cost and operating cost.

[0003] To improve space utilization and reduce costs, the existing power source for the hydraulic pump of a pure electric sweeper truck is the motor for driving the fan of the pure electric sweeper truck. The simplest transmission connection method is to drive-connect the transmission shaft of the hydraulic pump for the pure electric sweeper truck to the output shaft end of the fan driving motor through a keyway fitting method or a flange docking method. However, due to problems such as installation space limitations, the operation difficulties of keyway fitting and flange docking are relatively large. As a result, the transmission shaft of the hydraulic pump cannot be directly drive-connected to the output shaft end of the fan driving motor.

[0004] As Figure 1 shown: To ensure that the fan driving motor can synchronously drive the fan and the hydraulic pump, the current practice is to install a drive shaft at the output shaft end of the fan driving motor, then install a first transmission pulley on the drive shaft through a clutch, and install a second transmission pulley on the drive shaft outside the first transmission pulley. Then, the transmission shafts of the fan and the hydraulic pump are respectively drive-connected to the first transmission pulley and the second transmission pulley through a belt drive method. Due to the large installation operation difficulty, therefore, the hydraulic pump can only be drive-connected to the drive shaft through a belt drive method, which not only has a complex structure and is not easy to install and maintain, but also a belt tensioning device needs to be added to the belt drive mechanism of the hydraulic pump, which is very troublesome.

[0005] Therefore, the research objective of the present invention is to design a hydraulic pump driving device for a pure electric sweeper truck that can directly drive-connect the transmission shaft of the hydraulic pump to the drive shaft, thereby effectively and significantly improving the structural simplicity of the device and facilitating the installation operation of the device. Summary of the Invention

[0006] In view of the above technical problems existing in the prior art, the present invention provides a hydraulic pump driving device for a pure electric sweeper truck, which can effectively solve the above technical problems existing in the prior art.

[0007] The technical solution of the present invention is as follows:

[0008] A hydraulic pump driving device for a pure electric sweeper truck, comprising:

[0009] A bearing seat is fixedly mounted on the body of the corresponding pure electric sweeper, and a corresponding drive shaft is rotatably mounted on the bearing seat through a corresponding mounting bearing, and the drive shaft is driven by a corresponding drive motor;

[0010] The hydraulic pump is fixedly mounted on the outer side of the driving shaft through a corresponding mounting mechanism, the end of the driving shaft is provided with a corresponding plug hole, the plug hole is provided with a plurality of corresponding limit grooves at intervals, the transmission shaft of the hydraulic pump is provided with a fixed key corresponding to the limit groove, the outer side of the fixed key is respectively fixedly sleeved with an elastic compression member adapted to the shape of the limit groove, and the length of the fixed key and the elastic compression member is greater than the length of the limit groove by L 1 , the transmission shaft of the hydraulic pump is fixedly inserted into the insertion hole of the drive shaft by cooperating with the limiting groove through a fixed key provided with an elastic compression member;

[0011] The fixed connection mechanism comprises a driving nut screwed to the inner side of the transmission shaft of the hydraulic pump, and a fixing plate movably mounted on the transmission shaft of the hydraulic pump, wherein the fixing plate is respectively provided with a docking hole adapted to the fixing key, and the depth of the docking hole is L 1 After the transmission shaft of the hydraulic pump is inserted into the insertion hole, the drive nut is rotated to move outward to drive the fixing plate to move forward, so that the ends of the fixing keys are respectively inserted into the docking holes of the fixing plate. After the end surface of the fixing plate abuts against the end surface of the drive shaft, the elastic compression member is in an extruded state and is located in the space formed by the fixing plate, the limiting groove and the fixing key.

[0012] The elastic compression piece is made of rubber material.

[0013] The mounting mechanism is an L-shaped mounting plate, the bottom of the L-shaped mounting plate is fixedly connected to the body of the pure electric sweeper, and the hydraulic pump is fixedly connected to the top of the L-shaped mounting plate.

[0014] A corresponding guide hole is arranged on the top of the L-shaped mounting plate, and the transmission shaft of the hydraulic pump passes through the guide hole and is plugged into the plug-in hole of the drive shaft.

[0015] A corresponding fan is fixedly mounted on the upper side of the bearing seat via a bracket, and a transmission shaft of the fan is connected to the drive shaft via a belt drive.

[0016] A corresponding clutch is fixedly mounted on the driving shaft, a corresponding driving pulley is fixedly mounted on the clutch, and the driving shaft of the fan is connected to the driving pulley via a corresponding driving belt.

[0017] A tension adjustment mechanism for adjusting the tension of the transmission belt is fixedly mounted on the bracket.

[0018] The tensioning adjustment mechanism includes a component mounting seat fixedly connected to the bracket, a group of corresponding swinging plates are swingably mounted on the component mounting seat, the middle part of the swinging plate is rotatably mounted on the component mounting seat, a corresponding limiting shaft is rotatably mounted between the bottoms of the swinging plates, and a tensioning wheel abutting against the transmission belt is rotatably mounted between the upper parts of the swinging plates; the limiting shaft is driven to move by a corresponding tensioning driving mechanism to adjust the tensioning force of the tensioning wheel on the transmission belt.

[0019] The tensioning drive mechanism includes a wedge block movably arranged on the lower side of the limit shaft, and a pull rod fixedly connected to the wedge block. The pull rod is fixedly connected to the corresponding locking screw outward through a spring. The locking screw is installed through the outer side of the component mounting seat and is threaded with a corresponding limit nut. The limit nut is rotated to drive the locking screw to move outward, and the spring is stretched, and the wedge block is driven to drive the limit shaft under the action of the elastic force.

[0020] Corresponding internal threaded tubes are also fixedly connected to both sides of the wedge block, and tensioning bolts threaded to the internal threaded tubes are respectively fixedly installed on both sides of the component mounting seat; when the stretching amount of the spring reaches the design value, the rod end of the tensioning bolt passes through the component mounting seat and is locked to the corresponding internal threaded tube, and then the limit nut is rotated in the opposite direction to drive the locking screw to move inward, so that the spring is reset.

[0021] Advantages of the present invention:

[0022] 1) The hydraulic pump of the present invention is fixedly installed on the outer side of the driving shaft through a corresponding installation mechanism. On the basis of the keyway matching connection, the present invention further sets an elastic compression member on the outer side of the fixed key. The length of the fixed key and the elastic compression member is greater than the length of the limit groove by L. 1 , the transmission shaft of the hydraulic pump is fixedly inserted into the plug hole of the drive shaft by cooperating the fixed key with the elastic compression member and the limit groove of the drive shaft; then the driving nut of the fixed connection mechanism is rotated to move outward, so that the fixed plate of the fixed connection mechanism can be driven forward, so that the ends of the fixed key are respectively inserted into the docking holes of the fixed plate, and after the end face of the fixed plate abuts against the end face of the drive shaft, the elastic compression member is in an extruded state and is located in the space formed by the fixed plate, the limit groove and the fixed key. In this way, the transmission shaft of the hydraulic pump can be directly connected to the drive shaft, and the transmission connection stability between the two can be ensured, thereby effectively and significantly improving the structural simplicity of the equipment and facilitating the installation and operation of the equipment.

[0023] 2) The blower drive shaft of the present invention is drivingly connected to the drive shaft through a belt drive, and the present invention is provided with a tension adjustment mechanism for adjusting the tension of the drive belt. The tension adjustment mechanism includes a component mounting seat, on which a set of swing plates are swingably mounted. The middle parts of the swing plates are rotatably mounted on the component mounting seat. A limiting shaft is rotatably mounted between the bottoms of the swing plates, and a tension pulley that abuts against the drive belt is rotatably mounted between the upper parts of the swing plates. By driving the limiting shaft to move through a corresponding tension driving mechanism, the tension of the tension pulley on the drive belt can be adjusted, thereby effectively ensuring the practical effect of the present invention.

[0024] 3) Although the tension driving mechanism can drive the limiting shaft to move to adjust the tension of the tension pulley on the drive belt, its adjustment accuracy is difficult to control, and there are often problems of excessive tension. Once the tension is excessive, it will cause the rigidity of the belt drive to be too high, resulting in the vibration generated by the operation of the blower being easily transmitted to the drive shaft, thereby damaging the structural stability of the hydraulic pump directly drivingly connected to the drive shaft. Therefore, it is necessary to ensure the control accuracy of the tension of the drive belt.

[0025] To ensure the control accuracy of the tension of the drive belt, the present invention further improves the design of the tension driving mechanism. The tension driving mechanism of the present invention includes a wedge block movably disposed below the limiting shaft, and a pull rod fixed to the wedge block. The pull rod is externally fixed to a corresponding locking screw through a spring. The locking screw is installed through the outside of the component mounting seat and is screwed with a limit nut. By rotating the limit nut to drive the locking screw to move outwards, the spring can be stretched, and the wedge block can be driven to act on the limiting shaft under the action of the elastic force. At this time, by controlling the stretching amount of the spring, the driving force of the wedge block on the limiting shaft can be effectively adjusted, thereby adjusting and controlling the tension of the tension pulley on the drive belt, effectively ensuring the control accuracy of the tension of the drive belt, and further effectively ensuring the practical effect of the present invention.

[0026] 4) Corresponding internal threaded tubes are also fixed to both sides of the wedge block of the present invention. Tightening bolts screwed into the internal threaded tubes are respectively fixedly installed on both sides of the component mounting seat. When the stretching amount of the spring reaches the design value, that is, when the tension adjustment is in place, the rod end of the tightening bolt is locked to the corresponding internal threaded tube. At this time, by rotating the limit nut in the reverse direction to drive the locking screw to move inwards, the spring can be reset, thereby effectively ensuring the tension stability of the drive belt in the continuous operation state, and further effectively ensuring the practical effect of the present invention. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the hydraulic pump drive device described in the background art.

[0028] Figure 2 It is a schematic structural diagram of the present invention.

[0029] Figure 3 Exploded view of parts of the drive shaft, hydraulic pump, and fixed connection mechanism.

[0030] Figure 4 Cross-sectional view of the transmission installation of the transmission shaft of the hydraulic pump onto the drive shaft.

[0031] Figure 5 Structural schematic diagram of the tensioning adjustment mechanism

[0032] In the attached drawings: bearing seat 1, drive shaft 2, insertion hole 201, limit groove 202, drive motor 3, hydraulic pump 4, fixed key 401, elastic compression member 5, fixed connection mechanism 6, drive nut 601, fixed plate 602, docking hole 6021, L-shaped mounting plate 7, bracket 8, fan 9, clutch 10, drive pulley 11, drive belt 12, tensioning adjustment mechanism 13, component mounting seat 1301, swing plate 1302, limit shaft 1303, tensioning pulley 1304, tensioning drive mechanism 1305, wedge block 13051, pull rod 13052, spring 13053, locking screw 13054, limit nut 13055, internal thread tube 13056, tensioning bolt 13057. Detailed implementation manner

[0033] For the convenience of those skilled in the art to understand, the structure of the present invention will now be further described in detail with reference to the accompanying drawings in the embodiments:

[0034] Refer to Figure 2-5 , a hydraulic pump drive device for a pure electric sweeper, comprising:

[0035] Bearing seat 1, fixedly installed on the vehicle body of the corresponding pure electric sweeper, and a corresponding drive shaft 2 is rotatably installed on the bearing seat 1 through a corresponding mounting bearing, and the drive shaft 2 is driven by a corresponding drive motor 3;

[0036] Hydraulic pump 4, fixedly installed on the outside of the drive shaft 2 through a corresponding mounting mechanism, a corresponding insertion hole 201 is provided at the end of the drive shaft 2, a plurality of corresponding limit grooves 202 are arranged at intervals on the insertion hole 201, a fixed key 401 corresponding to the limit groove 202 is provided on the transmission shaft of the hydraulic pump 4, elastic compression members 5 having a shape adapted to the limit groove 202 are respectively fixedly sleeved on the outside of the fixed key 401, and the lengths of the fixed key 401 and the elastic compression member 5 are larger than the length of the limit groove 202 by L 1 , and the transmission shaft of the hydraulic pump 4 is fixedly inserted into the insertion hole 201 of the drive shaft 2 through the cooperation of the fixed key 401 provided with the elastic compression member 5 and the limit groove 202;

[0037] The fixed connection mechanism 6 comprises a driving nut 601 screwed to the inner side of the transmission shaft of the hydraulic pump 4, and a fixing plate 602 movably mounted on the transmission shaft of the hydraulic pump 4, wherein the fixing plate 602 is respectively provided with a docking hole 6021 adapted to the fixing key 401, and the depth of the docking hole 6021 is L 1 After the transmission shaft of the hydraulic pump 4 is inserted into the plug hole 201, the drive nut 601 is rotated to move outward to drive the fixing plate 602 to move forward, so that the ends of the fixing key 401 are respectively inserted into the docking holes 6021 of the fixing plate 602. After the end face of the fixing plate 602 abuts against the end face of the drive shaft 2, the elastic compression member 5 is in an extruded state and is located in the space formed by the fixing plate 602, the limiting groove 202 and the fixing key 401.

[0038] The hydraulic pump 4 of the present invention is fixedly installed on the outer side of the driving shaft 2 through a corresponding installation mechanism. On the basis of the keyway matching connection, the present invention further sets an elastic compression member 5 on the outer side of the fixed key 401. The length of the fixed key 401 and the elastic compression member 5 is greater than the length of the limit groove 202 by L. 1 , the transmission shaft of the hydraulic pump 4 is fixedly inserted into the plug hole 201 of the drive shaft 2 by cooperating the fixed key 401 provided with the elastic compression member 5 and the limiting groove 202 of the drive shaft 2; then the driving nut 601 of the fixed connection mechanism 6 is rotated to move outward, so that the fixed plate 602 of the fixed connection mechanism 6 can be driven to move forward, so that the ends of the fixed key 401 are respectively inserted into the docking holes 6021 of the fixed plate 602, and after the end surface of the fixed plate 602 abuts against the end surface of the drive shaft 2, the elastic compression member 5 is in an extruded state and is located in the space formed by the fixed plate 602, the limiting groove 202 and the fixed key 401. In this way, the transmission shaft of the hydraulic pump 4 can be directly connected to the drive shaft 2, and the transmission connection stability between the two can be ensured, thereby effectively and significantly improving the structural simplicity of the equipment and facilitating the installation and operation of the equipment.

[0039] The elastic compression member 5 is made of rubber material. The mounting mechanism is an L-shaped mounting plate 7, the bottom of which is fixedly connected to the body of the pure electric sweeper, and the hydraulic pump 4 is fixedly connected to the top of the L-shaped mounting plate 7. The top of the L-shaped mounting plate 7 is provided with a corresponding guide hole, and the transmission shaft of the hydraulic pump 4 passes through the guide hole and is plugged into the plug hole 201 of the drive shaft 2.

[0040] A corresponding fan 9 is fixedly mounted on the upper side of the bearing seat 1 via a bracket 8, and a transmission shaft of the fan 9 is connected to the driving shaft 2 via a belt drive.

[0041] A corresponding clutch 10 is fixedly installed on the drive shaft 2, and a corresponding drive pulley 11 is fixedly installed on the clutch 10. The transmission shaft of the fan 9 is connected to the drive pulley 11 through a corresponding transmission belt 12.

[0042] A tension adjustment mechanism 13 for adjusting the tension of the transmission belt is fixedly installed on the bracket 8.

[0043] The tension adjustment mechanism 13 includes a component mounting seat 1301 fixedly connected to the bracket 8. A corresponding swing plate 1302 is swingably installed on the component mounting seat 1301. The middle part of the swing plate 1302 is rotatably installed on the component mounting seat 1301. A corresponding limit shaft 1303 is rotatably installed between the bottoms of the swing plates 1302. A tension pulley 1304 that abuts against the transmission belt 12 is rotatably installed between the upper parts of the swing plates 1302. The limit shaft 1303 is driven to move through a corresponding tension driving mechanism 1305 to adjust the tension of the tension pulley 1304 on the transmission belt 12.

[0044] The transmission shaft of the fan 9 of the present invention is connected to the drive shaft 2 in a belt drive manner, and the present invention is provided with a tension adjustment mechanism 13 for adjusting the tension of the transmission belt. By driving the limit shaft 1303 of the tension adjustment mechanism 13 to move through a corresponding tension driving mechanism 1305, the tension of the tension pulley 1304 on the transmission belt 12 can be adjusted, thereby effectively ensuring the practical effect of the present invention.

[0045] The tension driving mechanism 1305 includes a wedge block 13051 movably arranged on the lower side of the limit shaft 1303, and a pull rod 13052 fixedly connected to the wedge block 13051. The pull rod 13052 is fixedly connected to a corresponding locking screw 13054 outward through a spring 13053. The locking screw 13054 is installed through the outside of the component mounting seat 1301 and is screwed with a corresponding limit nut 13055. Rotating the limit nut 13055 drives the locking screw 13054 to move outward, the spring 13053 is stretched, and the wedge block 13051 is driven to act on the limit shaft 1303 under the action of the elastic force.

[0046] Although the tension driving mechanism 1305 can adjust the tension of the tension pulley 1304 on the transmission belt 12 by driving the limiting shaft 1303 to move, it is difficult to control its adjustment accuracy, and there are often problems of excessive tension in many cases. To ensure the control accuracy of the tension of the transmission belt 12, the present invention further improves the design of the tension driving mechanism 1305. By controlling the stretching amount of the spring 13053, the driving force of the control wedge 13051 on the limiting shaft 1303 can be effectively adjusted, so as to adjust and control the tension of the tension pulley 1304 on the transmission belt 12, effectively ensuring the control accuracy of the tension of the transmission belt 12, and further effectively ensuring the practical effect of the present invention.

[0047] Corresponding internal threaded pipes 13056 are fixedly connected to both sides of the wedge 13051, and tension bolts 13057 screwed into the internal threaded pipes 13056 are respectively fixedly installed on both sides of the component mounting seat 1301; when the stretching amount of the spring 13053 reaches the design value, the rod end of the tension bolt 13057 penetrates through the component mounting seat 1301 and is locked to the corresponding internal threaded pipe 13056, and then the limit nut 13055 is rotated in the reverse direction to drive the locking screw 13054 to move inward, so that the spring 13053 is reset.

[0048] When the stretching amount of the spring 13053 reaches the design value, that is, when the tension adjustment is in place, the rod end of the tension bolt 13057 is locked to the corresponding internal threaded pipe 13056. At this time, the limit nut 13055 is rotated in the reverse direction to drive the locking screw 13054 to move inward, so that the spring 13053 can be reset, effectively ensuring the tension stability of the transmission belt 12 in the continuous operation state, and further effectively ensuring the practical effect of the present invention.

[0049] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic pump driving device for a pure electric sweeper, characterized in that: include: A bearing seat (1) is fixedly mounted on a body of a corresponding pure electric sweeper, and a corresponding drive shaft (2) is rotatably mounted on the bearing seat (1) via a corresponding mounting bearing, and the drive shaft (2) is driven by a corresponding drive motor (3); A hydraulic pump (4) is fixedly mounted on the outer side of the drive shaft (2) through a corresponding mounting mechanism, a corresponding plug hole (201) is provided at the end of the drive shaft (2), a plurality of corresponding limit grooves (202) are provided at intervals on the plug hole (201), a fixed key (401) corresponding to the limit groove (202) is provided on the transmission shaft of the hydraulic pump (4), elastic compression members (5) matching the shape of the limit groove (202) are fixedly sleeved on the outer side of the fixed key (401), the length of the fixed key (401) and the elastic compression member (5) being greater than the length of the limit groove (202) by L1, and the transmission shaft of the hydraulic pump (4) is fixedly plugged into the plug hole (201) of the drive shaft (2) by the fixed key (401) provided with the elastic compression member (5) cooperating with the limit groove (202); The fixed connection mechanism (6) comprises a driving nut (601) threadedly connected to the inner side of the transmission shaft of the hydraulic pump (4), and a fixing plate (602) movably mounted on the transmission shaft of the hydraulic pump (4), wherein the fixing plate (602) is respectively provided with docking holes (6021) adapted to the fixing keys (401), and the depth of the docking holes (6021) is L1. After the transmission shaft of the hydraulic pump (4) is plugged into the plugging hole (201), the plugging hole (6021) is rotated to engage with the fixing key (401). The drive nut (601) is driven to move outward to drive the fixing plate (602) to move forward, so that the ends of the fixing key (401) are respectively inserted into the docking holes (6021) of the fixing plate (602). After the end surface of the fixing plate (602) abuts against the end surface of the drive shaft (2), the elastic compression member (5) is located in a squeezed state in the space formed by the fixing plate (602), the limiting groove (202) and the fixing key (401).

2. The hydraulic pump driving device of a pure electric sweeper according to claim 1, characterized in that: The elastic compression member (5) is made of rubber material.

3. The hydraulic pump driving device of a pure electric sweeper according to claim 1, characterized in that: The mounting mechanism is an L-shaped mounting plate (7), the bottom of the L-shaped mounting plate (7) is fixedly connected to the body of the pure electric sweeper, and the hydraulic pump (4) is fixedly connected to the top of the L-shaped mounting plate (7).

4. The hydraulic pump driving device of a pure electric sweeper according to claim 3, characterized in that: A corresponding guide hole is provided on the top of the L-shaped mounting plate (7), and the transmission shaft of the hydraulic pump (4) passes through the guide hole and is plugged into the plug-in hole (201) of the drive shaft (2).

5. The hydraulic pump driving device of a pure electric sweeper according to claim 1, characterized in that: A corresponding fan (9) is fixedly mounted on the upper side of the bearing seat (1) via a bracket (8); a drive shaft of the fan (9) is connected to the drive shaft (2) via a belt drive.

6. The hydraulic pump driving device of a pure electric sweeper according to claim 5, characterized in that: A corresponding clutch (10) is fixedly mounted on the drive shaft (2), a corresponding drive pulley (11) is fixedly mounted on the clutch (10), and the drive shaft of the fan (9) is connected to the drive pulley (11) via a corresponding drive belt (12).

7. The hydraulic pump driving device of a pure electric sweeper according to claim 6, characterized in that: A tension adjustment mechanism (13) for adjusting the tension of the transmission belt (12) is fixedly mounted on the bracket (8).

8. The hydraulic pump driving device of a pure electric sweeper according to claim 7, characterized in that: The tensioning adjustment mechanism (13) comprises a component mounting seat (1301) fixedly connected to the bracket (8); a group of corresponding swinging plates (1302) are swingably mounted on the component mounting seat (1301); the middle part of the swinging plate (1302) is rotatably mounted on the component mounting seat (1301); a corresponding limiting shaft (1303) is rotatably mounted between the bottoms of the swinging plates (1302); and a tensioning wheel (1304) abutting against the transmission belt (12) is rotatably mounted between the upper parts of the swinging plates (1302); the limiting shaft (1303) is driven to move by a corresponding tensioning drive mechanism (1305) to adjust the tensioning force of the tensioning wheel (1304) on the transmission belt (12).

9. The hydraulic pump driving device of a pure electric sweeper according to claim 8, characterized in that: The tensioning drive mechanism (1305) comprises a wedge block (13051) movably arranged on the lower side of the limiting shaft (1303), and a pull rod (13052) fixedly connected to the wedge block (13051); the pull rod (13052) is fixedly connected to a corresponding locking screw (13054) outwardly through a spring (13053); the locking screw (13054) is installed through the outer side of the component mounting seat (1301) and is threaded with a corresponding limiting nut (13055); the limiting nut (13055) is rotated to drive the locking screw (13054) to move outward, the spring (13053) is stretched, and the wedge block (13051) is driven by the elastic force to drive the limiting shaft (1303).

10. The hydraulic pump driving device of a pure electric sweeper according to claim 9, characterized in that: The wedge block (13051) is also fixedly connected to corresponding internally threaded tubes (13056) on both sides, and the component mounting seat (1301) is respectively fixedly installed with tensioning bolts (13057) screwed to the internally threaded tubes (13056); when the stretching amount of the spring (13053) reaches the design value, the rod end of the tensioning bolt (13057) passes through the component mounting seat (1301) and is locked to the corresponding internally threaded tube (13056), and then the limiting nut (13055) is rotated in the opposite direction to drive the locking screw (13054) to move inward, so that the spring (13053) is reset.

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