An electric jack

Abstract

An electric jack, comprising a jack body with a jack rod provided therein; a plunger pump assembly provided on one side of the jack body, including a connecting base, a pump body, a plunger pump core and a pump body spring; Features: It further includes a fixing frame installed on the connecting base; a driving mechanism installed on the upper part of the fixing frame, having an output shaft, a driving motor and a reduction gearbox, and the driving motor is connected to a battery pack; a wave wheel provided in the inner cavity of the fixing frame and connected to the output shaft, the wave wheel is located above the plunger pump core and has a corrugated part, and the corrugated part is provided with a wave crest section and a wave trough section; a moving rod mechanism provided in the inner cavity of the fixing frame and including a moving rod member and a guiding block, the moving rod member is provided between the two guiding blocks and is also positioned between the wave wheel and the limiting plate of the plunger pump core and abuts against each other, and the reciprocating up and down movement of the plunger pump core is realized by using the height difference between the wave crest section and the wave trough section and the elastic force of the pump body spring. The structure is simple, with high strength, long service life, small volume, and improved operation stability and safety.

Description

Technical Field

[0001] The present invention belongs to the technical field of jack machinery manufacturing, and particularly relates to an electric jack. Background Art

[0002] Jack equipment is an essential maintenance tool in the automotive and other large machinery industries. With the rapid development of China's economic society, motorized vehicles such as passenger cars and commercial vehicles have been widely used as tools for daily commuting or cargo transportation. In case of accidental traffic accidents, human negligence, force majeure factors or internal mechanical damage, etc., repair operations must be carried out. Especially for various motorized multi-wheel vehicles with extremely large mass, a jack device that can be easily operated to lift the vehicle for easy repair is required. A jack is a light lifting device that jacks up heavy objects through a top tray, and it has the advantages of being light, strong, flexible and reliable. Jack equipment can be divided into two types according to the driving method: manual and electric. At present, the manual hydraulic jack is a well-known and very mature product, with a simple structure, good lifting performance and low cost. However, in actual use, since the jack is usually installed under the vehicle chassis, the operator needs to squat or even lie prone to press the handle to make the jack rod rise to lift the vehicle, which is time-consuming and laborious and there are also quite a few safety hazards. Especially for some female users, there are quite a lot of inconveniences in using the manual jack equipment. The electric hydraulic jack with simple operation and electric lifting can effectively overcome the above disadvantages and is increasingly popular among people.

[0003] There is also no shortage of technical information about such electric jack devices in the publicly available Chinese patent literature, such as: CN2663388Y (an automotive electric hydraulic jack), CN201214616Y (an electric hydraulic vertical jack), CN2841615Y (a vehicle electric jack), etc.; and the Chinese utility model patent with the patent authorization number CN211971620U discloses "an electric hydraulic jack", which includes an oil cylinder and a plunger pump. A motor and a reducer are also provided on one side of the plunger pump. A water-drop-shaped cam is provided at the front end of the output shaft of the reducer. The cam is located at the top of the plunger. As the cam rotates, the plunger makes a reciprocating up-and-down motion to drive the lifting rod of the oil cylinder to lift. It has the advantages that as recorded, it can be remotely controlled, the operator can operate away from the gradually lifted heavy object, and there is no need to consume physical strength, saving time and effort. However, since a cam is used as a driving member in this technical solution to achieve the reciprocating up-and-down motion of the plunger, the setting of the cam requires the motor and the reducer to be arranged horizontally on one side of the cam. The horizontally arranged motor and reducer will occupy a large amount of space, resulting in inconvenient carrying; at the same time, the direct exposure of the cam not only allows foreign objects from the outside to enter the relevant components, but also there is a risk of accidental contact by personnel, and the safety performance is poor; in addition, since a single cam directly contacts the plunger, once the cam has a horizontal offset, the running stability will be greatly reduced, the reliability is poor, and when in a non-working state, the plunger is always lifted upward under the upward tension of the return spring, and the cam and the drive shaft connected thereto are prone to deformation and even breakage after long-term stress, and the service life is poor.

[0004] In view of the above situation, it is necessary to reasonably improve the structure of the existing electric jack. For this reason, the applicant has made a beneficial design, and the technical solution to be introduced below is generated under this background. Summary of the Invention

[0005] The object of the present invention is to provide an electric jack with a simple structure, high strength, long service life, and which helps to set a wave wheel with a corrugated portion and a moving rod mechanism to achieve the reciprocating up-and-down motion of the plunger, and can place the motor and the speed reducer above to reduce the overall volume and improve the running stability, and is beneficial to achieve the smooth operation of the moving rod member and improve the safety by setting a fixing frame and a moving rod mechanism with a guiding block.

[0006] The task of the present invention is accomplished as follows. An electric jack includes: a jack body that extends along the vertical direction, and a lifting rod that can rise is arranged inside the jack body; a plunger pump assembly that is arranged at one side of the jack body and is in communication with it, and the plunger pump assembly can drive the movement of the lifting rod. The plunger pump assembly includes a connecting base, a pump body with a hollow interior installed on the connecting base, a plunger pump core inserted into the hollow cavity inside the pump body, and a pump body spring. A limiting plate is formed at the top end of the plunger pump core. The pump body spring is sleeved outside the pump body and the plunger pump core along the vertical direction, and the upper and lower ends of the pump body spring are respectively abutted against the connecting base and the limiting plate. The feature is that it further includes a fixing frame that extends along the vertical direction and is fixedly installed on the connecting base, and a fixing frame inner cavity is formed inside the fixing frame; a driving mechanism that is fixedly installed at the upper part of the fixing frame, and the driving mechanism has an output shaft that extends into the fixing frame inner cavity, a driving motor, and a reduction gearbox. The driving motor extends along the vertical direction and is positioned outside the fixing frame, and the driving motor is also electrically connected to a battery pack that can control its working state. The battery pack is equipped with a control unit and can provide power for the driving motor and simultaneously control the operation of the jack device; a wave wheel that is arranged inside the fixing frame inner cavity and is fixedly connected to the lower shaft body of the output shaft, and the wave wheel is located above the plunger pump core. The lower surface of the wave wheel facing downward is formed as a corrugated part, and the corrugated part has a pair of wave crest segments and a pair of wave trough segments that are staggered. There is a height difference between the wave crest segments and the wave trough segments; a moving rod mechanism that is arranged inside the fixing frame inner cavity and includes a moving rod and two guiding blocks. The two guiding blocks are arranged at the two end positions of the middle part inside the fixing frame in a relative and collinear state. The moving rod is arranged horizontally between the two guiding blocks, and the two ends of its length direction are respectively in sliding fit with the two guiding blocks. The moving rod is also positioned between the wave wheel and the limiting plate of the plunger pump core, and the moving rod is in contact with the corrugated part and the limiting plate. When the output shaft moves, the wave crest segments and the wave trough segments can sequentially contact the moving rod, so as to realize the reciprocating up and down movement of the plunger pump core by using the height difference between the wave crest segments and the wave trough segments and the elastic force of the pump body spring.

[0007] In a specific embodiment of the present invention, the fixing frame includes two fixing plates that are arranged at intervals and fixedly connected. The structural shapes of the two fixing plates are exactly the same and are both in the shape of a door-shaped plate structure. The fixing plate has a pair of vertical parts and a horizontal part connected to the upper parts of the two vertical parts, and a fixing seat is fixedly installed between the horizontal parts of the two fixing plates through fasteners.

[0008] In another specific embodiment of the present invention, a fixing plate connection hole is provided at the position near the bottom ends of the two vertical portions of the fixing plate. On the connection base of the plunger pump assembly and at positions corresponding to the four vertical portions of the two fixing plates, a connection protrusion is formed. The fixing frame further includes two fixing plate connection bolts passing between the two fixing plates. The fixing plate connection bolts pass through the connection protrusions on the same side of the connection base and also pass through the corresponding fixing plate connection holes of the two fixing plates. A fixing plate connection nut for locking the fixing plate connection bolts is also provided on the fixing plate connection bolts, thereby realizing the fixed connection between the fixing plate and the connection base.

[0009] In yet another specific embodiment of the present invention, the two guide blocks of the moving rod mechanism are respectively fixed between the two correspondingly arranged vertical portions of the two fixing plates. A plurality of guide block mounting holes are provided at the middle positions of the vertical portions. The fixing frame further includes guide block mounting bolts arranged in the corresponding two guide block mounting holes of the two fixing plates. The guide block mounting bolts pass through the corresponding guide block mounting holes of the two fixing plates and also pass through the guide blocks. A guide block mounting nut for locking the guide block mounting bolts is provided on the guide block mounting bolts, thereby realizing the fixed installation of the guide blocks with the two side fixing plates.

[0010] In still another specific embodiment of the present invention, the reduction gearbox of the driving mechanism is arranged above the driving motor and is in transmission connection with the output end of the driving motor. The reduction gearbox extends horizontally from above the driving motor to a position above the fixing frame. The output shaft is in transmission connection with the lower part of the reduction gearbox and passes downward through the fixing seat of the fixing frame. On the downward-facing side surface of the reduction gearbox and at a position corresponding to the inner cavity of the fixing frame, a reduction gearbox locking block is formed. On the transverse portions of the two fixing plates and at positions corresponding to the reduction gearbox locking block, reduction gearbox locking block mounting holes are provided. A reduction gearbox locking block fastener is also provided in the reduction gearbox locking block mounting holes. After passing through the reduction gearbox locking block mounting holes, the reduction gearbox locking block fastener is lock-mated and installed with the reduction gearbox locking block, thereby realizing the positioning installation of the whole reduction gearbox with the two side fixing plates.

[0011] In still another specific embodiment of the present invention, a fixing seat center hole penetrating in the thickness direction is provided at the center position of the fixing seat. A rolling bearing and a thrust bearing are respectively installed in a matching manner on the upper and lower end surfaces of the fixing seat and on the upper and lower two sides corresponding to the fixing seat center hole. The output shaft passes through the fixing seat center hole, and the rolling bearing and the thrust bearing are both sleeved on the shaft body of the output shaft.

[0012] In yet another specific embodiment of the present invention, the agitator wheel has an agitator wheel top panel with a circular plate-shaped structure and an agitator wheel cylinder part with a cylindrical shape structure. The corrugated part is formed at a position on the side of the agitator wheel cylinder part away from the agitator wheel top panel. A central hole of the agitator wheel top panel is formed at the center position of the agitator wheel top panel. The output shaft passes downward through the central hole of the agitator wheel top panel, and a locking key groove is recessed on the inner side wall of the central hole of the agitator wheel top panel. An output shaft locking key adapted to the shape of the locking key groove is installed on the shaft body of the output shaft. The output shaft locking key is fitted and installed in the locking key groove to achieve the positioning of the output shaft and the agitator wheel. On the end shaft body of the output shaft protruding from the agitator wheel top panel, an output shaft lock nut and an output shaft washer are further provided. The output shaft washer is arranged between the agitator wheel top panel and the output shaft lock nut, and the output shaft lock nut locks the output shaft body and the agitator wheel top panel together, thereby realizing the fixed connection between the output shaft and the agitator wheel body.

[0013] In yet another more specific embodiment of the present invention, the peak segments and valley segments of the corrugated part are arranged at intervals and staggered, and the two peak segments are symmetrically arranged with respect to the radial axis of the agitator wheel top panel, and the two valley segments are also symmetrically arranged with respect to the radial axis of the agitator wheel top panel.

[0014] In yet another further specific embodiment of the present invention, the moving rod member has a moving rod body, and a moving rod positioning sleeve is sleeved on each of the two near-end positions corresponding to the length direction of the moving rod body. Two moving rod bearings are further sleeved on the rod body of the moving rod member and at the inner side positions of the two moving rod positioning sleeves. The two moving rod bearings are respectively arranged in close contact with the corresponding moving rod positioning sleeves, and the two moving rod bearings are arranged corresponding to the corrugated part and are in contact with the corrugated part.

[0015] In yet another more further specific embodiment of the present invention, a guiding groove is formed on the opposite side surfaces of the two guiding blocks. The guiding groove extends along the vertical direction, and the two end parts of the moving rod body in the length direction are respectively slidably fitted in the guiding grooves on both sides and can slide up and down therein, thereby realizing the guiding of the up and down movement of the moving rod body.

[0016] The beneficial effects of the present invention are as follows: First, by providing a wave wheel fixedly connected to the output shaft and a moving rod mechanism, the wave wheel has wave crest segments and wave trough segments arranged staggeredly. When the output shaft moves, the wave crest segments and the wave trough segments can successively contact the moving rod member, so as to realize the up-and-down reciprocating motion of the plunger pump core by utilizing the height difference between the wave crest segments and the wave trough segments and the elastic force of the pump body spring. Therefore, the up-and-down reciprocating motion of the moving rod member of the moving rod mechanism is realized by the rotation of the wave wheel, so that the plunger pump core can also realize its own up-and-down reciprocating motion, and then drive the ejector rod of the jack body to move, which is economical, reliable and can quickly lift. At the same time, the output shaft and the driving motor are arranged vertically, while the reduction box is arranged horizontally, and the driving mechanism including the above three is integrally installed on the upper part of the fixing frame, which can greatly reduce the overall volume of the jack, thus facilitating the user to carry. Second, by providing a fixing frame, and the output shaft, the wave wheel and the moving rod mechanism are built in the inner cavity of the fixing frame, avoiding the above components being directly exposed outside, with a compact overall structure, a simple assembly relationship, and greatly improved safety. Third, the moving rod bearing on the moving rod member of the moving rod mechanism is used to contact the wave wheel and realize the up-and-down reciprocating motion of the moving rod body. At the same time, a guiding block is provided to guide the moving rod body, with stable and reliable operation, and the guiding block can limit the upper top position of the moving rod body to ensure the reliability of use. Fourth, using the battery pack with a controller as the power supply for the electric jack and the control of the actions of the electric jack has the advantages of long service life, environmental protection, safety and small volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is an exploded perspective view of an embodiment of the present invention.

[0018] Figure 2 FIG. is an exploded perspective view of an embodiment of the present invention from another angle.

[0019] Figure 3 FIG. is a schematic diagram of the overall structure of an embodiment of the present invention.

[0020] Figure 4 FIG. is a sectional view of the overall structure of an embodiment of the present invention.

[0021] Figure 5 FIG. is a schematic diagram of the structure of the wave wheel of the present invention.

[0022] In the figure: 1. Jack body, 11. Jack rod; 2. Plunger pump assembly, 21. Connecting base, 211. Connecting protrusion, 22. Pump body, 23. Plunger pump core, 231. Limiting plate, 24. Pump body spring; 3. Fixed frame, 31. Inner cavity of fixed frame, 32. Fixed plate, 321. Vertical part, 3211. Fixed plate connection hole, 3212. Guide block installation hole, 322. Horizontal part, 3221. Reduction box locking block installation hole, 3222. Reduction box locking block fastener, 33. Fixed seat, 331. Fixed seat center hole, 332. Rolling bearing, 333. Thrust bearing, 34. Fixed plate connection bolt, 341. Fixed plate connection nut, 35. Guide block installation bolt, 351. Guide block installation nut; 4. Driving mechanism, 41. Output shaft, 411. Output shaft locking key, 412. Output shaft locking nut, 413. Output shaft washer, 42. Driving motor, 421. Battery pack, 43. Reduction box, 431. Reduction box locking block; 5. Wavy wheel, 51. Corrugated part, 511. Crest section, 512. Trough section, 52. Wavy wheel top panel, 521. Wavy wheel top panel center hole, 5211. Locking keyway, 53. Wavy wheel barrel part; 6. Moving rod mechanism, 61. Moving rod member, 611. Moving rod body, 612. Moving rod positioning sleeve, 613. Moving rod bearing, 62. Guide block, 621. Guide groove. Detailed implementation mode

[0023] In order to more clearly understand the technical essence and beneficial effects of the present invention, detailed descriptions will be made below in the form of embodiments. However, the descriptions of the embodiments are not limitations on the technical solutions of the present invention. Any equivalent transformation that is only formal rather than substantial based on the concept of the present invention should be regarded as falling within the scope of the technical solutions of the present invention.

[0024] In the following descriptions, all directional or positional concepts such as up, down, left, right, front, and back are based on Figure 1 the position state, and thus cannot be understood as special limitations on the technical solutions provided by the present invention.

[0025] Please refer to Figures 1 to 5, which shows an electric jack, including a jack body 1. The jack body 1 extends along the vertical direction, and a jack rod 11 that can rise upward is slidably connected inside the jack body 1; it also shows a plunger pump assembly 2, which is arranged at one side position of the jack body 1 and is in communication with it, and the plunger pump assembly 2 can drive the aforementioned jack rod 11 to move. The plunger pump assembly 2 includes a connection base 21, a pump body 22 with a hollow interior installed on the connection base 21, a plunger pump core 23 inserted into the hollow cavity inside the pump body 22, and a pump body spring 24. A limiting plate 231 is formed at the top end of the aforementioned plunger pump core 23. The aforementioned pump body spring 24 is sleeved along the vertical direction on the outer sides of the aforementioned pump body 22 and the plunger pump core 23, and the upper and lower end portions of the pump body spring 24 are respectively in contact with the aforementioned connection base 21 and the limiting plate 231; the connection method and driving method between the jack body 1 and the plunger pump assembly 2 are both prior arts, and reference can be made to the relevant technical documents mentioned in the background art, and the applicant will not elaborate further.

[0026] As the technical key points of the technical solution provided by the present invention: The electric jack further includes a fixing frame 3, which extends along the vertical direction and is fixedly installed on the aforementioned connection base 21, and a fixing frame inner cavity 31 is formed inside the fixing frame 3; it also shows a driving mechanism 4, which is fixedly installed at the upper position of the aforementioned fixing frame 3, and the driving mechanism 4 has an output shaft 41 that extends into the aforementioned fixing frame inner cavity 31. The driving mechanism 4 also has a driving motor 42 and a speed reducer 43. The aforementioned driving motor 42 extends along the vertical direction and is positioned outside the aforementioned fixing frame 3, as Figure 3As shown in the figure, the drive motor 42 is also electrically connected to a battery pack 421 with a control unit. The battery pack 421 can provide power for the drive motor 42 and at the same time control the operation of the jacking device. When the jacking rod 11 of the jacking device rises to the working position or is in the descending state, the control unit can cut off the power supply to make the whole stop working. When the jacking rod 11 of the jacking device is in the ascending state, the control unit can turn on the power supply, thereby realizing the overall control of the operation of the jacking device. There are already many products on the market for the battery pack with a control unit (control module), and no specific model is specified here; a wave wheel 5 is also shown, which is arranged in the inner cavity 31 of the aforementioned fixed frame and fixedly connected to the lower shaft body of the aforementioned output shaft 41, and the wave wheel 5 is located above the aforementioned plunger pump core 23. The lower surface of the wave wheel 5 facing downward is configured as a corrugated part 51, and the corrugated part 51 has a pair of wave crest segments 511 and a pair of wave trough segments 512 arranged staggeredly, and there is a height difference between the wave crest segment 511 and the wave trough segment 512; a moving rod mechanism 6 is also shown, which is arranged in the inner cavity 31 of the aforementioned fixed frame and includes a moving rod member 61 and two guide blocks 62. The two aforementioned guide blocks 62 are respectively arranged at the two end positions in the middle of the inner side of the aforementioned fixed frame 3 in a relative and collinear state. The aforementioned moving rod member 61 is arranged horizontally between the two guide blocks 62, and the two end portions in the length direction of the moving rod member 61 are respectively in sliding fit with the two guide blocks 62 on both sides. The moving rod member 61 is also positioned between the wave wheel 5 and the limiting plate 231 of the plunger pump core 23, and the moving rod member 61 is in contact with both the aforementioned corrugated part 51 and the limiting plate 231. When the output shaft 41 moves, the wave crest segment 511 and the wave trough segment 512 can contact the moving rod member 61 in sequence, so as to realize the up-and-down reciprocating movement of the plunger pump core 23 by using the height difference between the wave crest segment 511 and the wave trough segment 512 and the elastic force of the pump body spring 24.

[0027] In this embodiment, the aforementioned fixed frame 3 includes two fixed plates 32 arranged at intervals and fixedly connected. The structural shapes of the two fixed plates 32 are exactly the same and are both in the shape of a portal plate structure. The aforementioned fixed plate 32 has a pair of vertical parts 321 and a horizontal part 322 connected to the upper parts of the two vertical parts 321. A fixed seat 33 is fixedly installed between the horizontal parts 322 of the two fixed plates 32 through fasteners.

[0028] Further, fixing plate connection holes 3211 are respectively formed at positions near the bottom ends of the two vertical portions 321 of the foregoing fixing plate 32. On the connection base 21 of the foregoing plunger pump assembly 2 and at positions corresponding to the four vertical portions 321 of the two fixing plates 32, a connection protrusion 211 is formed. The foregoing fixing frame 3 further includes two fixing plate connection bolts 34 passing through between the two fixing plates 32. The fixing plate connection bolts 34 pass through the connection protrusions 211 on the same side of the connection base 21 and at the same time pass through the corresponding fixing plate connection holes 3211 of the two fixing plates 32. A fixing plate connection nut 341 for locking it is also provided on the fixing plate connection bolt 34, thereby realizing the fixed connection between the foregoing fixing plate 32 and the connection base 21.

[0029] Please continue to refer to Figure 1 With Figure 2 , the two guiding blocks 62 of the foregoing moving rod mechanism 6 are respectively fixed between two correspondingly arranged vertical portions 321 of the two foregoing fixing plates 32. A plurality of guiding block mounting holes 3212 are respectively formed at the middle positions of the foregoing vertical portions 321. The foregoing fixing frame 3 further includes guiding block mounting bolts 35 disposed in the corresponding guiding block mounting holes 3212 of the two fixing plates 32. The guiding block mounting bolts 35 pass through the corresponding guiding block mounting holes 3212 of the two fixing plates 32 and at the same time pass through the guiding blocks 62. A guiding block mounting nut 351 for locking it is provided on the guiding block mounting bolt 35, thereby realizing the fixed installation of the guiding blocks 62 and the two side fixing plates 32.

[0030] In this embodiment, the reduction gearbox 43 of the foregoing driving mechanism 4 is disposed above the driving motor 42 and is in transmission connection with the output end of the driving motor 42. The reduction gearbox 43 extends horizontally from above the driving motor 42 to a position above the fixing frame 3. The foregoing output shaft 41 is in transmission connection with the lower portion of the reduction gearbox 43 and passes downward through the fixing seat 33 of the foregoing fixing frame 3. On the downward-facing side surface of the reduction gearbox 43 and at a position corresponding to the inner cavity 31 of the foregoing fixing frame, a reduction gearbox locking block 431 is further formed. On the transverse portions 322 of the two fixing plates 32 and at positions corresponding to the reduction gearbox locking block 431, reduction gearbox locking block mounting holes 3221 are respectively formed. A reduction gearbox locking block fastener 3222 is further disposed in the reduction gearbox locking block mounting holes 3221. After passing through the reduction gearbox locking block mounting holes 3221, the reduction gearbox locking block fastener 3222 is lock-fitted and installed with the foregoing reduction gearbox locking block 431, thereby realizing the positioning installation of the entire reduction gearbox 43 and the two side fixing plates 32.

[0031] Further, a fixing seat central hole 331 penetrating in the thickness direction is provided at the central position of the foregoing fixing seat 33. A rolling bearing 332 and a thrust bearing 333 are respectively and cooperatively installed on the upper and lower end faces of the foregoing fixing seat 33 and on the upper and lower sides corresponding to the fixing seat central hole 331. The foregoing output shaft 41 passes through the fixing seat central hole 331, and the foregoing rolling bearing 332 and thrust bearing 333 are both sleeved on the shaft body of the foregoing output shaft 41.

[0032] Please refer to Figure 1 , Figure 4 and Figure 5 , the foregoing impeller 5 has an impeller top panel 52 with a circular plate-shaped structure and an impeller cylindrical body portion 53 with a cylindrical-shaped structure. The foregoing corrugated portion 51 is formed at a position on the side of the impeller cylindrical body portion 53 away from the foregoing impeller top panel 52. A central hole 521 of the impeller top panel is provided at the central position of the foregoing impeller top panel 52. The foregoing output shaft 41 passes downward through the central hole 521 of the impeller top panel, and a locking key groove 5211 is recessed on the inner side wall of the central hole 521 of the impeller top panel. An output shaft locking key 411 adapted to the shape of the locking key groove 5211 is installed on the shaft body of the foregoing output shaft 41. The output shaft locking key 411 is cooperatively installed in the foregoing locking key groove 5211 to achieve the positioning of the output shaft 41 and the impeller 5; and an output shaft locking nut 412 and an output shaft washer 413 are further provided on the shaft body of the foregoing output shaft 41 extending out of the foregoing impeller top panel 52. The output shaft washer 413 is disposed between the foregoing impeller top panel 52 and the output shaft locking nut 412, and the foregoing output shaft locking nut 412 locks the shaft body of the output shaft 41 and the foregoing impeller top panel 52 together, thereby realizing the fixed connection between the output shaft 41 and the foregoing impeller 5 body.

[0033] Further, the wave crest segments 511 and wave trough segments 512 of the foregoing corrugated portion 51 are arranged at intervals and staggered, and the two wave crest segments 511 are symmetrically arranged about the radial axis of the foregoing impeller top panel 52, and the two wave trough segments 512 are also symmetrically arranged about the radial axis of the foregoing impeller top panel 52.

[0034] Please continue to refer to Figure 1 and Figure 2 , the foregoing moving rod member 61 has a moving rod body 611. A moving rod positioning sleeve 612 is sleeved on the moving rod body 611 at positions near the two ends corresponding to its length direction. Two moving rod bearings 613 are further sleeved on the rod body of the moving rod member 61 and inside the two moving rod positioning sleeves 612. The two foregoing moving rod bearings 613 are respectively disposed close to the corresponding moving rod positioning sleeves 612, and the two moving rod bearings 613 are arranged corresponding to the foregoing corrugated portion 51 and are in contact with the corrugated portion 51.

[0035] In this embodiment, a guide groove 621 is formed on the surface of one side of the two aforementioned guide blocks 62 facing each other. The guide groove 621 extends along the vertical direction, and the two end portions of the moving rod body 611 in the length direction are respectively slidably fitted in the guide grooves 621 on both sides and can slide up and down therein, so as to realize the guiding of the up and down movement of the moving rod body 611.

[0036] Please refer to Figures 1 to 5 , and briefly describe the working principle of the technical solution provided by the present invention: When this electric jack works, by controlling the driving motor 42 of the driving mechanism 4 to work, the rotation of the output shaft 41 is realized through the transmission of the speed reducer 43. The output shaft 41 further drives the pulley 5 fixedly connected to its lower part to rotate. During the rotation of the pulley 5, the corrugated part 51 at its lower part rotates, and the two moving rod bearings 613 on the moving rod member 61 are sequentially in contact with the wave crest section 511 and the wave trough section 512 on the corrugated part 51, so that the whole moving rod member 61 and the moving rod body 611 can continuously move up and down reciprocally. When the moving rod body 611 moves downward, the moving rod body 611 pushes downward against the limiting plate 231 abutted against its lower part, and the plunger pump core 23 can move downward by overcoming the tension of the pump body spring 24 under the action of the downward thrust. When the moving rod body 611 moves upward, the limiting plate 231 of the plunger pump core 23 is no longer subjected to the downward thrust, so that the plunger pump core 23 moves upward under the tension of the pump body spring 24. Therefore, during the up and down reciprocating movement of the moving rod member 61, the plunger pump core 23 can also realize its own up and down reciprocating movement, and finally the ejector rod 11 in the jack body 1 is lifted upward.

[0037] In summary, the technical solution provided by the present invention makes up for the deficiencies in the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. An electric jack, comprising: A jack body (1) extends along the vertical direction, and a jack rod (11) capable of rising upward is arranged inside the jack body (1); a plunger pump assembly (2) is arranged at one side position of the jack body (1) and is communicated with the jack body (1), and the plunger pump assembly (2) can drive the jack rod (11) to move. The plunger pump assembly (2) includes a connecting base (21), a pump body (22) with a hollow interior mounted on the connecting base (21), a plunger pump core (23) inserted into the hollow cavity inside the pump body (22), and a pump body spring (24). A limiting plate (231) is formed at the top end of the plunger pump core (23). The pump body spring (24) is sleeved outside the pump body (22) and the plunger pump core (23) along the vertical direction, and the upper and lower ends of the pump body spring (24) are respectively abutted against the connecting base (21) and the limiting plate (231); It is characterized in that it further includes a fixing frame (3) which extends along the vertical direction and is fixedly installed on the connecting base (21), and a fixing frame inner cavity (31) is formed inside the fixing frame (3); a driving mechanism (4) is fixedly installed at the upper position of the fixing frame (3), and the driving mechanism (4) has an output shaft (41) extending into the fixing frame inner cavity (31), a driving motor (42) and a reduction gearbox (43). The driving motor (42) extends along the vertical direction and is positioned outside the fixing frame (3), and the driving motor (42) is also electrically connected to a battery pack (421) capable of controlling its working state. The battery pack (421) has a control unit and can provide power for the driving motor (42) and simultaneously control the action of the jack device; a pulley (5) is arranged in the fixing frame inner cavity (31) and is fixedly connected to the lower shaft body of the output shaft (41), and the pulley (5) is located above the plunger pump core (23). The lower surface of the pulley (5) facing downward is formed as a corrugated part (51), and the corrugated part (51) has a pair of wave crest segments (511) and a pair of wave trough segments (512) arranged staggeredly. There is a height difference between the wave crest segment (511) and the wave trough segment (512);A moving rod mechanism (6) is arranged in the inner cavity (31) of the fixed frame and includes a moving rod member (61) and two guide blocks (62). The two guide blocks (62) are respectively arranged at the two end positions in the middle of the inner side of the fixed frame (3) in a state of being opposite to each other and on the same horizontal line. The moving rod member (61) is arranged horizontally between the two guide blocks (62), and the two end portions in the length direction thereof are respectively in sliding fit with the two guide blocks (62). The moving rod member (61) is also positioned between the wave wheel (5) and the limiting plate (231) of the plunger pump core (23), and the moving rod member (61) is in contact with both the corrugated portion (51) and the limiting plate (231). When the output shaft (41) moves, the wave crest section (511) and the wave trough section (512) can successively contact the moving rod member (61), so as to realize the reciprocating up and down movement of the plunger pump core (23) by using the height difference between the wave crest section (511) and the wave trough section (512) and the elastic force of the pump body spring (24).; 2. The electric jack according to claim 1, characterized in that The fixing bracket (3) includes two fixing plates (32) that are spaced apart and fixedly connected. The two fixing plates (32) have exactly the same structural shape and are both in the shape of a portal plate structure. The fixing plate (32) has a pair of vertical portions (321) and a horizontal portion (322) connected to the upper parts of the two vertical portions (321). A fixing seat (33) is fixedly installed between the horizontal portions (322) of the two fixing plates (32) through fasteners.

3. The electric jack according to claim 2, characterized in that At the positions near the bottom ends of the two vertical portions (321) of the fixing plate (32), a fixing plate connection hole (3211) is provided. On the connection base (21) of the plunger pump assembly (2) and at positions corresponding to the four vertical portions (321) of the two fixing plates (32), a connection protrusion (211) is formed. The fixing bracket (3) further includes two fixing plate connection bolts (34) passing through between the two fixing plates (32). The fixing plate connection bolts (34) pass through the connection protrusions (211) on the same side of the connection base (21) and also pass through the corresponding fixing plate connection holes (3211) of the two fixing plates (32). A fixing plate connection nut (341) for locking it is provided on the fixing plate connection bolt (34), thereby realizing the fixed connection between the fixing plate (32) and the connection base (21).

4. The electric jack according to claim 2, wherein The two guide blocks (62) of the moving rod mechanism (6) are respectively fixed between the two correspondingly arranged vertical portions (321) of the two fixing plates (32). At the middle positions of the vertical portions (321), a plurality of guide block mounting holes (3212) are provided. The fixing bracket (3) further includes guide block mounting bolts (35) arranged in the two correspondingly arranged guide block mounting holes (3212) of the two fixing plates (32). The guide block mounting bolts (35) pass through the corresponding guide block mounting holes (3212) of the two fixing plates (32) and also pass through the guide blocks (62). A guide block mounting nut (351) for locking it is provided on the guide block mounting bolt (35), thereby realizing the fixed installation of the guide blocks (62) and the two side fixing plates (32).

5. The electric jack according to claim 2, characterized in that The speed reducer (43) of the driving mechanism (4) is arranged above the driving motor (42) and is in transmission connection with the output end of the driving motor (42). The speed reducer (43) extends horizontally from above the driving motor (42) to a position above the fixing frame (3). The output shaft (41) is in transmission connection with the lower part of the speed reducer (43) and passes downward through the fixing seat (33) of the fixing frame (3). On the downward-facing side surface of the speed reducer (43) and at a position corresponding to the inner cavity (31) of the fixing frame, a speed reducer locking block (431) is formed. On the transverse parts (322) of the two fixing plates (32) and at positions corresponding to the speed reducer locking block (431), speed reducer locking block mounting holes (3221) are provided. A speed reducer locking block fastener (3222) is also arranged in the speed reducer locking block mounting hole (3221). After passing through the speed reducer locking block mounting hole (3221), the speed reducer locking block fastener (3222) is lock-fitted and installed with the speed reducer locking block (431), thereby realizing the positioning installation of the entire speed reducer (43) with the two side fixing plates (32).

6. The electric jack according to claim 2, wherein A fixing seat central hole (331) penetrating in the thickness direction is provided at the central position of the fixing seat (33). A rolling bearing (332) and a thrust bearing (333) are respectively and cooperatively installed on the upper and lower end surfaces of the fixing seat (33) and on the upper and lower sides corresponding to the fixing seat central hole (331). The output shaft (41) passes through the fixing seat central hole (331), and the rolling bearing (332) and the thrust bearing (333) are both sleeved on the shaft body of the output shaft (41).

7. An electric jack according to claim 2, characterized in that The agitator (5) includes an agitator top panel (52) having a circular plate shape structure and an agitator cylinder part (53) having a cylindrical shape structure. The corrugated part (51) is formed at a position on the side of the agitator cylinder part (53) away from the agitator top panel (52). An agitator top panel center hole (521) is provided at the center position of the agitator top panel (52). The output shaft (41) passes downward through the agitator top panel center hole (521), and a locking key groove (5211) is recessed on the inner side wall of the agitator top panel center hole (521). An output shaft locking key (411) adapted to the shape of the locking key groove (5211) is installed on the shaft body of the output shaft (41). The output shaft locking key (411) is fitted and installed in the locking key groove (5211) to achieve the positioning of the output shaft (41) and the agitator (5). On the end shaft body of the output shaft (41) protruding from the agitator top panel (52), an output shaft locking nut (412) and an output shaft washer (413) are further provided. The output shaft washer (413) is arranged between the agitator top panel (52) and the output shaft locking nut (412), and the output shaft locking nut (412) locks the shaft body of the output shaft (41) and the agitator top panel (52) together, thereby realizing the fixed connection between the output shaft (41) and the agitator (5) body.

8. An electric jack according to claim 7, characterized in that The peak segments (511) and trough segments (512) of the corrugated part (51) are arranged at intervals and alternately. The two peak segments (511) are symmetrically arranged with respect to the radial axis of the agitator top panel (52), and the two trough segments (512) are also symmetrically arranged with respect to the radial axis of the agitator top panel (52).

9. The electric jack according to claim 2, characterized in that The moving rod member (61) includes a moving rod body (611). A moving rod positioning sleeve (612) is sleeved on the moving rod body (611) at positions near the two ends in the length direction. Two moving rod bearings (613) are also sleeved on the rod body of the moving rod member (61) at positions inside the two moving rod positioning sleeves (612). The two moving rod bearings (613) are respectively arranged close to the corresponding moving rod positioning sleeves (612), and the two moving rod bearings (613) are arranged corresponding to the corrugated part (51) and are in contact with the corrugated part (51).

10. The electric jack according to claim 9, characterized in that A guide groove (621) is provided on the opposite side surfaces of the two guide blocks (62). The guide groove (621) extends along the vertical direction. The two end portions of the moving rod body (611) in the length direction are respectively slidably fitted in the guide grooves (621) on both sides and can slide up and down therein, thereby realizing the guiding of the up and down movement of the moving rod body (611).

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