Hydraulic pump driving device of pure electric sweeper

Abstract

The invention discloses a hydraulic pump driving device of a pure electric motor sweeper, which comprises a bearing seat, a hydraulic pump, a hydraulic pump, a hydraulic pump, a hydraulic pump, a hydraulic pump, a hydraulic pump, a hydraulic pump, a hydraulic pump, a hydraulic pump, a hydraulic pump, a hydraulic pump and a hydraulic pump, and is characterized in that the bearing seat is rotatably provided with a driving shaft through a mounting bearing; the hydraulic pump is fixedly installed on the outer side of the driving shaft, an inserting hole is formed in the end of the driving shaft, a plurality of limiting grooves are formed in the inserting hole at intervals, a fixing key is arranged on a transmission shaft of the hydraulic pump, and the outer side of the fixing key is fixedly sleeved with an elastic compression piece. The transmission shaft of the hydraulic pump is fixedly inserted into the insertion hole of the driving shaft through cooperation of the fixing key and the limiting groove. And the fixed connection mechanism comprises a driving nut in threaded connection with the inner side of a transmission shaft of the hydraulic pump and fixing plates, and butt joint holes are formed in the fixing plates respectively. The transmission shaft of the hydraulic pump can be directly connected to the driving shaft in a transmission mode, so that the structural simplicity degree of equipment can be effectively and greatly improved, and installation and operation of the equipment are facilitated.

Description

Technical Field

[0001] The invention relates to a hydraulic pump driving device, in particular to a hydraulic pump driving device of a pure electric sweeper. Background Art

[0002] At present, in the sanitation vehicle industry, the key components of pure electric sweepers, such as sweeping discs, suction nozzles, and boxes, are all powered by hydraulic pumps. The traditional driving method of hydraulic pumps for pure electric sweepers is to use a separate motor to directly drive, which will increase the vehicle's manufacturing cost and operating cost.

[0003] In order to improve space utilization and reduce costs, the power source used by the existing pure electric sweeper hydraulic pump is the pure electric sweeper's fan drive motor. The simplest transmission connection method is to connect the drive shaft of the pure electric sweeper hydraulic pump to the output shaft end of the fan drive motor through a keyway match or a flange docking method. However, due to installation space limitations and other issues, the keyway match and flange docking operations are relatively difficult. As a result, the drive shaft of the hydraulic pump cannot be directly connected to the output shaft end of the fan drive motor.

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

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

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

[0007] The technical solution of the present invention is: A hydraulic pump driving device for a pure electric sweeper, comprising: 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; A hydraulic pump is fixedly installed on the outer side of the driving shaft through a corresponding mounting mechanism, a corresponding plug-in hole is provided at the end of the driving shaft, a plurality of corresponding limit grooves are provided at intervals on the plug-in hole, a fixing key corresponding to the limit groove is provided on the transmission shaft of the hydraulic pump, elastic compression parts matching the shape of the limit groove are fixedly sleeved on the outer side of the fixing key, the length of the fixing key and the elastic compression part is greater than the length L1 of the limit groove, and the transmission shaft of the hydraulic pump is fixedly plugged into the plug-in hole of the driving shaft by the fixing key provided with the elastic compression part and the limit groove; 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, the fixing plate is respectively provided with docking holes matched with the fixing keys, the depth of the docking holes is L1, after the transmission shaft of the hydraulic pump is plugged into the plug-in holes, the driving nut is rotated to move outward to drive the fixing plate forward so that the ends of the fixing keys are respectively plugged into the docking holes of the fixing plate, after the end face of the fixing plate abuts against the end face of the driving 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.

[0008] The elastic compression piece is made of rubber material.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] A tension adjustment mechanism for adjusting the tension of the transmission belt is fixedly mounted on the bracket.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] Advantages of the present invention: 1) The hydraulic pump of the present invention is fixedly installed on the outside of the drive shaft through a corresponding installation mechanism. On the basis of the keyway matching connection, the present invention further sets an elastic compression piece on the outside of the fixed key. The length of the fixed key and the elastic compression piece is greater than the length L1 of the limit groove. The drive shaft of the hydraulic pump is fixedly plugged into the plug hole of the drive shaft by matching the fixed key with the elastic compression piece 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 plugged into the docking holes of the fixed plate. After the end face of the fixed plate abuts against the end face of the drive shaft, the elastic compression piece 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 drive shaft of the hydraulic pump can be directly connected to the drive shaft, and the stability of the transmission connection 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.

[0018] 2) The fan drive shaft of the present invention is connected to the drive shaft by belt transmission, and the present invention is provided with a tension adjustment mechanism for adjusting the tension of the transmission belt. The tension adjustment mechanism comprises a component mounting seat, on which a group of swing plates are swingably mounted, the middle part of the swing plates are rotatably mounted on the component mounting seat, a limit shaft is rotatably mounted between the bottoms of the swing plates, and a tensioning wheel abutting against the transmission belt is rotatably mounted between the upper parts of the swing plates. The limit shaft is driven to move by the corresponding tension driving mechanism to adjust the tension of the tensioning wheel on the transmission belt, thereby effectively ensuring the practical effect of the present invention.

[0019] 3) Although the tensioning drive mechanism drives the limit shaft to move, it can adjust the tension of the tension wheel on the transmission belt, but its adjustment accuracy is difficult to control, and there is often a problem of excessive tension. Once the tension is excessive, the rigidity of the belt drive will be too high, causing the vibration generated by the fan operation to be easily transmitted to the drive shaft, thereby damaging the structural stability of the hydraulic pump directly connected to the drive shaft. For this reason, it is necessary to ensure the control accuracy of the tension of the transmission belt.

[0020] In order to ensure the control accuracy of the tensioning force of the transmission belt, the present invention further improves the design of the tensioning drive mechanism. The tensioning drive mechanism of the present invention includes a wedge block movably arranged on the lower side of the limit shaft, and a pull rod fixed to the wedge block. The pull rod is fixed to the corresponding locking screw outward through a spring. The locking screw is installed on the outer side of the component mounting seat and is screwed with a limit nut. The limit nut is rotated to drive the locking screw to move outward, so that the spring is stretched, and the wedge block is driven to drive the limit shaft under the action of the elastic force. At this time, the driving force of the control wedge block on the limit shaft can be effectively adjusted by controlling the stretching amount of the spring, thereby adjusting the tensioning force of the control tension wheel on the transmission belt, so as to effectively ensure the control accuracy of the tensioning force of the transmission belt, thereby further effectively ensuring the practical effect of the present invention.

[0021] 4) The wedge block of the present invention is also fixedly connected with corresponding internal threaded tubes on both sides, and the component mounting seat is respectively fixedly installed with tensioning bolts threaded to the internal threaded tubes on both sides. When the stretching amount of the spring reaches the design value, that is, the tensioning force is adjusted to the right position, the rod end of the tensioning bolt is locked to the corresponding internal threaded tube. At this time, the limit nut is rotated in the opposite direction to drive the locking screw to move inward, so that the spring can be reset, thereby effectively ensuring the tension stability of the transmission belt in a continuous operation state, so as to further effectively ensure the practical effect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the hydraulic pump driving device described in the background technology.

[0023] Figure 2 It is a structural schematic diagram of the present invention.

[0024] Figure 3 This is an exploded view of the parts of the drive shaft, hydraulic pump, and fixed connection mechanism.

[0025] Figure 4 A cross-sectional view of the hydraulic pump's drive shaft being mounted on the drive shaft.

[0026] Figure 5 Schematic diagram of the tension adjustment mechanism In the accompanying drawings: bearing seat 1, drive shaft 2, plug-in 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, transmission belt 12, tensioning adjustment mechanism 13, component mounting seat 1301, swing plate 1302, limit shaft 1303, tensioning wheel 1304, tensioning drive mechanism 1305, wedge block 13051, pull rod 13052, spring 13053, locking screw 13054, limit nut 13055, internal threaded tube 13056, tensioning bolt 13057. DETAILED DESCRIPTION

[0027] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments in conjunction with the accompanying drawings: refer to Figure 2-5 , a hydraulic pump driving device of a pure electric sweeper, comprising: The bearing seat 1 is fixedly mounted on the body of the corresponding pure electric sweeper, and a corresponding drive shaft 2 is rotatably mounted on the bearing seat 1 through a corresponding mounting bearing, and the drive shaft 2 is driven by a corresponding drive motor 3; The hydraulic pump 4 is fixedly installed on the outer side of the driving shaft 2 through a corresponding installation mechanism. A corresponding plug-in hole 201 is provided at the end of the driving shaft 2. A plurality of corresponding limiting grooves 202 are provided at intervals on the plug-in hole 201. A fixed key 401 corresponding to the limiting groove 202 is provided on the transmission shaft of the hydraulic pump 4. Elastic compression members 5 matching the shape of the limiting groove 202 are fixedly sleeved on the outer sides of the fixed keys 401. The lengths of the fixed keys 401 and the elastic compression members 5 are greater than the length L1 of the limiting groove 202. The transmission shaft of the hydraulic pump 4 is fixedly plugged into the plug-in hole 201 of the driving shaft 2 by cooperating with the fixed key 401 provided with the elastic compression member 5 and the limiting groove 202. The fixed connection mechanism 6 includes a driving nut 601 screwed to the inner side of the transmission shaft of the hydraulic pump 4, and a fixing plate 602 movably installed on the transmission shaft of the hydraulic pump 4, and the fixing plate 602 is respectively provided with docking holes 6021 adapted to the fixing key 401, and the depth of the docking hole 6021 is L1. After the transmission shaft of the hydraulic pump 4 is inserted into the plug-in hole 201, the driving nut 601 is rotated to move outward to drive the fixing plate 602 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 driving 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.

[0028] The hydraulic pump 4 of the present invention is fixedly installed on the outer side of the drive shaft 2 through a corresponding installation mechanism. On the basis of the keyway matching and connection, the present invention further fixes elastic compression components 5 on the outer side of the fixed key 401. The lengths of the fixed key 401 and the elastic compression component 5 are greater than the length L1 of the limiting groove 202. The fixed key 401 provided with the elastic compression component 5 cooperates with the limiting groove 202 of the drive shaft 2 to fix the transmission shaft of the hydraulic pump 4 into the plug-in hole 201 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 forward, so that the ends of the fixed key 401 are respectively plugged into the docking holes 6021 of the fixed plate 602. After the end face of the fixed plate 602 abuts against the end face of the drive shaft 2, the elastic compression component 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 conveniently and directly connected to the drive shaft 2, and the stability of the transmission connection 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.

[0029] 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.

[0030] 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.

[0031] A corresponding clutch 10 is fixedly mounted on the driving shaft 2 , a corresponding driving pulley 11 is fixedly mounted on the clutch 10 , and the driving shaft of the fan 9 is connected to the driving pulley 11 via a corresponding driving belt 12 .

[0032] A tension adjustment mechanism 13 for adjusting the tension of the transmission belt is fixedly mounted on the bracket 8 .

[0033] The tensioning adjustment mechanism 13 includes 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 bottom of the swinging plate 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 the corresponding tensioning driving mechanism 1305 to adjust the tensioning force of the tensioning wheel 1304 on the transmission belt 12.

[0034] The fan 9 drive shaft of the present invention is connected to the drive shaft 2 by belt transmission, and the present invention is provided with a tensioning adjustment mechanism 13 for adjusting the tension of the transmission belt. The limit shaft 1303 of the tensioning adjustment mechanism 13 is driven to move by the corresponding tensioning drive mechanism 1305, so as to adjust the tensioning force of the tensioning wheel 1304 on the transmission belt 12, thereby effectively ensuring the practical effect of the present invention.

[0035] The tensioning drive 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 the corresponding locking screw 13054 outwardly through a spring 13053. The locking screw 13054 is installed on the outer side of the component mounting seat 1301 and is threaded with a corresponding limit nut 13055. The limit nut 13055 is rotated to drive the locking screw 13054 to move outward, and the spring 13053 is stretched, and the wedge block 13051 is driven to drive the limit shaft 1303 under the action of the elastic force.

[0036] Although the tension driving mechanism 1305 drives the limit shaft 1303 to move, it can adjust the tension of the tension wheel 1304 on the transmission belt 12, but its adjustment accuracy is difficult to control, and there is often a problem of excessive tension. In order 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, and can effectively adjust the driving force of the control wedge block 13051 on the limit shaft 1303 by controlling the stretching amount of the spring 13053, thereby adjusting the tension of the control tension wheel 1304 on the transmission belt 12, so as to effectively ensure the control accuracy of the tension of the transmission belt 12, thereby further effectively ensuring the practical effect of the present invention.

[0037] The wedge block 13051 is also fixedly connected with corresponding internal threaded tubes 13056 on both sides, and the component mounting seat 1301 is respectively fixedly installed with tensioning bolts 13057 screwed to the internal threaded tubes 13056 on both sides; 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 internal threaded tube 13056, and then the limit nut 13055 is rotated in the opposite direction to drive the locking screw 13054 to move inward, so that the spring 13053 is reset.

[0038] When the stretching amount of the spring 13053 reaches the design value, that is, the tensioning force is adjusted to the right position, the rod end of the tensioning bolt 13057 is locked to the corresponding internal threaded tube 13056. At this time, the limit nut 13055 is rotated in the opposite direction to drive the locking screw 13054 to move inward, so that the spring 13053 can be reset, thereby effectively ensuring the tensioning stability of the transmission belt 12 in a continuous running state, so as to further effectively ensure the practical effect of the present invention.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection 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 parts (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 part (5) being greater than the length L1 of the limit groove (202), 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 part (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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