阅读说明：本技术 一种稳定性好节能型游梁抽油机 (Energy-saving beam-pumping unit with good stability ) 是由 陈思楠 尹煊 尤洋 袁艺瑕 王金通 陈志平 王跃歧 王艳 王楚涵 于 2019-12-25 设计创作，主要内容包括：本发明公开了一种稳定性好节能型游梁抽油机,包括底板,所述底板上端左侧固定连接有第一支架,所述第一支架上端中心前后对称固定连接有立板一,两个所述立板一之间固定连接有固定轴一,所述第一支架上端外侧固定连接有第二支架,所述第二支架顶端前后对称固定连接有立板二,两个所述立板二之间安装有转轴一,所述转轴一两端分别与两个立板二通过轴承转动连接,所述转轴一的一侧固定连接拉杆的一端,所述固定轴一上通过轴承和连接块转动连接有游梁,所述游梁前后两侧立面的上端分别固定连接有滑条,所述游梁的上端活动连接有配重块,所述配重块底端内侧对称设有滑槽。本发明结构科学合理,节能性好,稳定性好,适合推广使用。(The invention discloses an energy-saving beam-pumping unit with good stability, which comprises a bottom plate, wherein the left side of the upper end of the bottom plate is fixedly connected with a first bracket, the center of the upper end of the first support is fixedly connected with first vertical plates in a front-back symmetrical mode, a first fixed shaft is fixedly connected between the first vertical plates, a second bracket is fixedly connected to the outer side of the upper end of the first bracket, vertical plates II are symmetrically and fixedly connected to the top end of the second bracket from front to back, a first rotating shaft is arranged between the two vertical plates II, two ends of the first rotating shaft are respectively and rotatably connected with the two vertical plates and the two vertical plates through bearings, one side of the first rotating shaft is fixedly connected with one end of a pull rod, the first fixed shaft is rotatably connected with a walking beam through a bearing and a connecting block, the upper ends of front and rear vertical surfaces of the walking beam are respectively and fixedly connected with a slide bar, the upper end swing joint of walking beam has the balancing weight, balancing weight bottom inboard symmetry is equipped with the spout. The invention has scientific and reasonable structure, good energy saving performance and good stability, and is suitable for popularization and use.)

1. The utility model provides a good energy-saving beam-pumping unit of stability, includes bottom plate (1), its characterized in that: the left side of the upper end of the bottom plate (1) is fixedly connected with a first support (2), the front and back of the center of the upper end of the first support (2) are symmetrically and fixedly connected with a first vertical plate (201), a first fixing shaft (202) is fixedly connected between the two first vertical plates (201), the outer side of the upper end of the first support (2) is fixedly connected with a second support (3), the front and back of the top end of the second support (3) are symmetrically and fixedly connected with a second vertical plate (301), a first rotating shaft (302) is installed between the two second vertical plates (301), the two ends of the first rotating shaft (302) are respectively and rotatably connected with the two second vertical plates (301) through bearings, one side of the first rotating shaft (302) is fixedly connected with one end of a pull rod (6), the first fixing shaft (202) is rotatably connected with a walking beam (4) through bearings and connecting blocks, and the upper ends of the front, the upper end of the walking beam (4) is movably connected with a balancing weight (5), sliding grooves (501) are symmetrically arranged on the inner side of the bottom end of the balancing weight (5), a sliding strip (401) is movably arranged in the sliding grooves (501), vertical plates three (502) are symmetrically and fixedly connected with the front and back of the center of the top end of the balancing weight (5), a rotating shaft two (503) is movably connected between the two vertical plates three (502), two ends of the rotating shaft two (503) are respectively and rotatably connected with the vertical plates three (502) through bearings, the other end of a pull rod (6) is fixedly connected with the left side of the rotating shaft two (503), the center of the bottom end of the right side of the walking beam (4) is respectively and fixedly connected with two vertical plates four (9) and two vertical plates five (10) from left to right, a fixed shaft two (11) is fixedly connected between the two vertical plates four (, the connecting rod (13) is connected to the second fixing shaft (11) in a rotating mode, the connecting rod (16) is connected to the third fixing shaft (12) in a rotating mode, a counterweight ball (17) is fixedly connected to the bottom end of the connecting rod (16), a threaded sleeve (18) is hinged to the upper end of the right side of the connecting rod (13) through a rotating pin, the threaded sleeve (18) is hinged to the left side of the connecting rod (16) through a rotating pin in a rotating mode, the threaded sleeves (18) correspond to each other, one ends, close to each other, of the threaded sleeves (18) are connected through a threaded adjusting screw rod (19) in a threaded mode, a third support (7) is fixedly connected to the right side of the upper end of the bottom plate (1), a power device (8) is fixedly connected to the third support (7), the power device (8) comprises a base (801), a shell (803), be equipped with disjunctor double worm wheel (804) in casing (803), symmetry fixedly connected with power shaft (805) respectively on the front and back both sides facade of disjunctor double worm wheel (804), two power shaft (805) run through the preceding back wall of casing (803) respectively to the outside, and outer end one side of two power shaft (805) is fixed connection power transmission board (806) respectively, two power transmission board (806) symmetry set up, the upper and lower both ends of two worm wheels on disjunctor double worm wheel (804) are engaged with worm (807) respectively, four the both ends of worm (807) are rotated through bearing and casing (803) respectively and are connected, four the left end of worm (807) is fixedly connected with gear (808) respectively, four engage between gear (808) power gear (809), power gear (809) fixed connection is on transmission shaft (810), transmission shaft (810) left end runs through fixing base (811) and gland (812) respectively and enters into installation shell ((808) ((ii) 813) The left end of the transmission shaft (810) is rotatably connected with the left side of the inner wall of the installation shell (813) through a bearing, the left end of the transmission shaft (810) is located in the installation shell (813) and fixedly connected with a power worm wheel (814), the bottom end of the power worm wheel (814) is meshed with a power worm (815), the front end of the power worm (815) is rotatably connected onto the inner wall of the installation shell (813) through the bearing, the rear end of the power worm (815) penetrates through the rear side wall of the installation shell (813) and is fixedly connected with a power output shaft of a motor (816), and the motor (816) is fixedly connected onto the outer wall of the rear side of the installation shell (813).

2. The energy-saving beam-pumping unit with high stability as claimed in claim 1, characterized in that a baffle (402) is fixedly connected to the right end of the beam (4).

3. The energy-saving beam-pumping unit with good stability as claimed in claim 1, wherein the counterweight (5) is in sliding fit with the beam (4).

4. The energy-saving beam-pumping unit with high stability as claimed in claim 1, wherein the power shaft (805) is rotatably connected with the outer wall of the housing (803) through a bearing, two bearings are fixedly connected in the fixed seat (811), and the transmission shaft (810) is rotatably connected with the fixed seat (811) through two bearings.

5. The energy-saving beam-pumping unit with high stability as claimed in claim 1, wherein the upper end of the casing (803) is fixedly connected with a cover plate (817) through a bolt.

6. The energy-saving beam-pumping unit with high stability as claimed in claim 1, wherein the fixed seat (811) is fixedly connected with the housing (803) through bolts, the gland (812) is fixedly connected with the fixed seat (811) through bolts, and the mounting shell (813) is fixedly connected with the gland (812) through bolts.

7. The energy-saving beam-pumping unit with good stability as claimed in claim 1, characterized in that the turning directions of the threads at the two ends of the adjusting screw rod (19) are opposite, the two thread sleeves (18) are respectively provided with threads matching with the threads at the two ends of the adjusting screw rod (19), and the middle part of the adjusting screw rod (19) is fixedly connected with a rotating disc (1901).

8. The energy-saving beam-pumping unit with good stability as claimed in claim 1, characterized in that the two power transmission plates (806) are respectively and rotatably connected with the support rod at the bottom end of the connecting rod (13) through pin shafts (14), and the pin shafts (14) between the two power transmission plates (806) and the two support rods of the connecting rod (13) are respectively and movably connected with gaskets (15).

Technical Field

The invention relates to a pumping unit, in particular to an energy-saving beam pumping unit with good stability.

Background

The traditional beam-pumping unit generally adopts a motor to drive a belt to drive a gear reduction box, so that a crank and a connecting rod of the pumping unit rotate at a slow speed to achieve the purpose of pumping oil. At the same time, two or four balance blocks with a weight of about one ton are arranged at the crank and used for balancing the acting force of the wellhead loading force. The structure is safe and reliable, but has the problem of balance weight and unbalance, only the pumping unit has a balance effect when going up, the pumping unit consumes more energy when going down, and the balance weight is inconvenient to allocate, the motor consumes more energy, the belt drive belt is easy to be tired and loosened, and the like, so that the stability of the whole beam pumping unit is poor, and therefore, the energy-saving beam pumping unit with good stability is provided.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an energy-saving beam-pumping unit with good stability, which solves the problem of unbalanced balance weight of the existing beam-pumping unit, and has the advantages of balanced effect only when the pumping unit goes up, higher energy consumption when the pumping unit goes down, inconvenience in balance weight allocation, higher energy consumption of a motor, easy fatigue and looseness of a belt transmission belt and the like, so that the problem of poor stability of the whole beam-pumping unit is caused.

In order to solve the technical problems, the invention provides the following technical scheme: an energy-saving beam-pumping unit with good stability comprises a bottom plate, wherein a first support is fixedly connected to the left side of the upper end of the bottom plate, a first vertical plate is symmetrically and fixedly connected to the front and back of the center of the upper end of the first support, a first fixing shaft is fixedly connected between the two first vertical plates, a second support is fixedly connected to the outer side of the upper end of the first support, a second vertical plate is symmetrically and fixedly connected to the front and back of the top end of the second support, a first rotating shaft is installed between the two second vertical plates, two ends of the first rotating shaft are respectively rotatably connected with the two vertical plates through bearings, one side of the first rotating shaft is fixedly connected with one end of a pull rod, a walking beam is rotatably connected to the first fixing shaft through a bearing and a connecting block, the upper ends of front and back vertical surfaces of the walking beam are respectively, the slide bar is movably arranged in the chute, vertical plates III are symmetrically and fixedly connected with the top center of the counterweight block in a front-back manner, a rotating shaft II is movably connected between the two vertical plates III, two ends of the rotating shaft II are respectively and rotatably connected with the vertical plates III through bearings, the other end of the pull rod is fixedly connected with the left side of the rotating shaft II, the bottom center of the right side of the walking beam is respectively and fixedly connected with two vertical plates IV and two vertical plates V from left to right, a fixed shaft II is fixedly connected between the two vertical plates IV, a fixed shaft III is fixedly connected between the two vertical plates V, a connecting rod is rotatably connected on the fixed shaft II, a connecting rod is rotatably connected on the fixed shaft III, a counterweight ball is fixedly connected at the bottom end of the connecting rod, a threaded sleeve is movably hinged at the upper end of the right side of the connecting rod through, one ends of the two screw sleeves, which are close to each other, are in threaded connection through an adjusting screw rod, the right side of the upper end of the bottom plate is fixedly connected with a third support, a power device is fixedly connected onto the third support, the power device comprises a base, a shell is fixedly connected onto the base through a plurality of stand columns, a connected double worm wheel is arranged in the shell, power shafts are respectively and symmetrically and fixedly connected onto vertical surfaces of the front side and the rear side of the connected double worm wheel, the two power shafts respectively penetrate through the front wall and the rear wall of the shell to the outside, one side of the outer ends of the two power shafts is respectively and fixedly connected with a power transmission plate, the two power transmission plates are symmetrically arranged, the upper end and the lower end of the two worm wheels on the connected double worm wheel are respectively engaged with a worm, two ends of the four worms are respectively and rotatably, four the meshing has power gear between the gear, power gear fixed connection is on the transmission shaft, the transmission shaft left end runs through in fixing base and the gland enters into the installation shell respectively to the left end of transmission shaft passes through the bearing and rotates with installation shell inner wall left side and be connected, the transmission shaft left end is located the interior fixed connection of installation shell and has the power worm wheel, the meshing of power worm wheel bottom has power worm, the power worm front end passes through the bearing and rotates the connection on the installation shell inner wall, the rear end of power worm runs through installation shell rear side wall to with the power output shaft fixed connection of motor, motor fixed connection is on installation shell rear side outer wall.

On the basis of the scheme, the right end head of the walking beam is fixedly connected with a baffle.

On the basis of the scheme, the balancing weight is in sliding fit with the walking beam.

On the basis of the scheme, the power shaft is rotatably connected with the outer wall of the shell through the bearings, the two bearings are fixedly connected in the fixing seat, and the transmission shaft is rotatably connected with the fixing seat through the two bearings.

On the basis of the scheme, the upper end of the shell is fixedly connected with a cover plate through a bolt.

On the basis of the scheme, the fixing seat is fixedly connected with the shell through bolts, the gland is fixedly connected with the fixing seat through bolts, and the installation shell is fixedly connected with the gland through bolts.

On the basis of the scheme, the turning directions of the threads at the two ends of the adjusting screw rod are opposite, the threads matched with the threads at the two ends of the adjusting screw rod are respectively arranged in the two thread sleeves, and the rotating disc is fixedly connected to the middle of the adjusting screw rod in an integrated mode.

On the basis of the scheme, the two power transmission plates are respectively and rotatably connected with the supporting rods at the bottom ends of the connecting rods through pin shafts, and the pin shafts between the two power transmission plates and the two supporting rods of the connecting rods are respectively and movably connected with gaskets.

Compared with the prior art, the invention has the beneficial effects that: the invention relates to an energy-saving beam-pumping unit with good stability, which adopts a new design for a power device of the beam-pumping unit, adopts a worm to drive a worm wheel to transmit power, sets a power output worm wheel with a non-conjoined double worm wheel, adopts four worms to drive the conjoined double worm wheel to rotate to transmit power, and avoids the problem that a belt is easy to fatigue and loosen when the belt is used for transmission, thereby greatly improving the stability of power transmission.

Drawings

FIG. 1 is a schematic structural diagram of an energy-saving beam pumping unit with good stability according to the present invention;

FIG. 2 is a side view of a connection structure of a first support and a second support of an energy-saving beam pumping unit with good stability according to the present invention;

FIG. 3 is a side view of a connection structure of a counterweight and a walking beam of the energy-saving walking beam pumping unit with good stability;

FIG. 4 is a side view of a connection structure of a walking beam and a connecting rod of the energy-saving walking beam pumping unit with good stability;

FIG. 5 is a front sectional view of the power device structure of the energy-saving beam-pumping unit with good stability of the invention;

FIG. 6 is a side view of a power gear and gear connection structure of an energy-saving beam pumping unit with good stability according to the present invention;

FIG. 7 is a sectional view of the power device of the energy-saving beam pumping unit with good stability;

FIG. 8 is a schematic view of a connection structure of a threaded sleeve and an adjusting screw rod of the energy-saving beam pumping unit with good stability;

FIG. 9 is a diagram I of the operation state of an energy-saving beam pumping unit with good stability according to the present invention;

FIG. 10 is a diagram II of the operation state of the energy-saving beam pumping unit with good stability;

FIG. 11 is a diagram III of the operation state of an energy-saving beam pumping unit with good stability according to the present invention;

fig. 12 is a diagram iv of the operating state of the energy-saving beam pumping unit with good stability.

The reference numbers in the figures are: 1-bottom plate, 2-first support, 201-first vertical plate, 202-first fixed shaft, 3-second support, 301-second vertical plate, 302-first rotating shaft, 4-walking beam, 401-sliding strip, 402-baffle, 5-balancing weight, 501-sliding chute, 502-third vertical plate, 503-second rotating shaft, 6-pull rod, 7-third support, 8-power device, 801-base, 802-upright column, 803-shell, 804-conjoined double worm gear, 805-power shaft, 806-power transmission plate, 807-worm, 808-gear, 809-power gear, 810-transmission shaft, 811-fixed seat, 812-gland, 813-mounting shell, 814-power worm gear, 815-power worm, 816-motor, 817-cover plate, 9-vertical plate four, 10-vertical plate five, 11-fixed shaft two, 12-fixed shaft three, 13-connecting rod, 14-pin shaft, 15-gasket, 16-connecting rod, 17-counterweight ball, 18-thread sleeve, 19-adjusting screw rod and 1901-rotating disc.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Referring to fig. 1 to 12, it can be known that an energy-saving beam pumping unit with good stability comprises a base plate 1, a first support 2 is fixedly connected to the left side of the upper end of the base plate 1, first vertical plates 201 are fixedly connected to the center of the upper end of the first support 2 in a front-back symmetrical manner, a first fixing shaft 202 is fixedly connected between the first vertical plates 201, a second support 3 is fixedly connected to the outer side of the upper end of the first support 2, second vertical plates 301 are fixedly connected to the top end of the second support 3 in a front-back symmetrical manner, a first rotating shaft 302 is installed between the second vertical plates 301, two ends of the first rotating shaft 302 are respectively rotatably connected with the second vertical plates 301 through bearings, so that the first rotating shaft 302 can rotate on the second vertical plates 301, one side of the first rotating shaft 302 is fixedly connected with one end of a pull rod 6, a beam 4 is rotatably connected to the first fixing shaft 202 through, the upper ends of front and rear vertical surfaces of the walking beam 4 are respectively fixedly connected with a slide bar 401, the upper end of the walking beam 4 is movably connected with a counterweight 5, the inner side of the bottom end of the counterweight 5 is symmetrically provided with a sliding groove 501, the slide bar 401 is movably arranged in the sliding groove 501, the counterweight 5 can stably run on the walking beam 4 by the slide bar 401, the front and rear center of the top end of the counterweight 5 is symmetrically and fixedly connected with a vertical plate three 502, a rotating shaft two 503 is movably connected between the two vertical plates three 502, two ends of the rotating shaft two 503 are respectively rotatably connected with the vertical plate three 502 through bearings, so that the rotating shaft two 503 can conveniently rotate on the vertical plate three 502, the other end of the pull rod 6 is fixedly connected with the left side of the rotating shaft two 503, the center of the bottom end of the right side of the walking beam 4 is respectively and fixedly connected with two vertical, a third fixed shaft 12 is fixedly connected between the two fifth vertical plates 10, a connecting rod 13 is rotatably connected to the second fixed shaft 11, the connecting rod 13 can swing left and right below the second fixed shaft 11, a connecting rod 16 is rotatably connected to the third fixed shaft 12, a counterweight ball 17 is fixedly connected to the bottom end of the connecting rod 16, the counterweight ball 17 can swing left and right under the walking beam 4 to counterweight the up-and-down swing of the walking beam 4, a threaded sleeve 18 is movably hinged to the upper end of the right side of the connecting rod 13 through a rotating pin, the threaded sleeve 18 can swing up and down on one side of the connecting rod 13, a threaded sleeve 18 is movably hinged to the left side of the connecting rod 16 through a rotating pin, the threaded sleeve 18 can swing up and down on one side of the connecting rod 16, the two threaded sleeves 18 correspond to each other, one ends of the two threaded sleeves 18, which are close to each other, are in threaded connection through an adjusting screw rod, a third support 7 is fixedly connected to the right side of the upper end of the bottom plate 1, a power device 8 is fixedly connected to the third support 7, the power device 8 includes a base 801, a housing 803 is fixedly connected to the base 801 through a plurality of upright posts 802, a conjoined double worm gear 804 is arranged in the housing 803, power shafts 805 are respectively and symmetrically and fixedly connected to front and rear vertical faces of the conjoined double worm gear 804, the two power shafts 805 respectively penetrate through the front and rear walls of the housing 803 to the outside, power transmission plates 806 are respectively and fixedly connected to one sides of the outer ends of the two power shafts 805, the two power transmission plates 806 are symmetrically arranged, the upper and lower ends of the two worm gears on the conjoined double worm gear 804 are respectively engaged with worms, two ends of the four worms 807 are respectively and rotatably connected to the housing 803 through bearings, gears 808 are respectively and fixedly connected to the left ends of the four worms 807, and power gears 809 are engaged between the four gears 808, the power gear 809 is fixedly connected to the transmission shaft 810, the left end of the transmission shaft 810 penetrates through the fixed seat 811 and the gland 812 and enters the installation shell 813, the left end of the transmission shaft 810 is rotatably connected with the left side of the inner wall of the installation shell 813 through a bearing, the left end of the transmission shaft 810 is fixedly connected with the power worm wheel 814 in the installation shell 813, the bottom end of the power worm wheel 814 is meshed with the power worm 815, the front end of the power worm 815 is rotatably connected to the inner wall of the installation shell 813 through a bearing, the rear end of the power worm 815 penetrates through the rear side wall of the installation shell 813 and is fixedly connected with the power output shaft of the motor 816, the motor 816 is fixedly connected to the outer wall of the rear side of the installation shell 813, and the power device 8 can provide stable.

A baffle 402 is fixedly connected to the right end of the walking beam 4, so that the balancing weight 5 can be prevented from sliding out of the walking beam 4; the balancing weight 5 is in sliding fit with the walking beam 4, so that the balancing weight 5 can slide on the walking beam 4 conveniently; the power shaft 805 is rotatably connected with the outer wall of the shell 803 through a bearing, so that the power shaft 805 can stably run; two bearings are fixedly connected in the fixed seat 811, and the transmission shaft 810 is rotatably connected with the fixed seat 811 through the two bearings, so that the transmission shaft 810 can stably run in the fixed seat 811; a cover plate 817 is fixedly connected to the upper end of the shell 803 through bolts, and the cover plate 817 facilitates maintenance of the interior of the shell 803; the fixed seat 811 is fixedly connected with the shell 803 through bolts, the gland 812 is fixedly connected with the fixed seat 811 through bolts, the mounting shell 813 is fixedly connected with the gland 812 through bolts, and the mounting and dismounting are convenient through the bolt fixing connection; the turning directions of the threads at the two ends of the adjusting screw rod 19 are opposite, so that the two thread sleeves 18 can simultaneously and reversely move on the adjusting screw rod 19 when the adjusting screw rod 19 is screwed, the threads matched with the threads at the two ends of the adjusting screw rod 19 are respectively arranged in the two thread sleeves 18, the distance between the two thread sleeves can be conveniently adjusted when the adjusting screw rod 19 is screwed, and the purpose of adjusting the position of the counterweight ball 17 is achieved; the middle part of the adjusting screw rod 19 is integrally and fixedly connected with a rotating disc 1901, and the rotating disc 1901 is convenient for rotating the adjusting screw rod 19.

The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.

The principle and the advantages of the invention are as follows: an energy-saving beam pumping unit with good stability is disclosed, when in use, the motor 816 is externally connected with a power supply, the motor 816 is turned on (a hydraulic motor can also be used as power to adapt to the temperature of different areas in winter), the motor 816 drives the power worm 815 to rotate, the power worm 815 drives the power worm wheel 814 to rotate, the power worm wheel 814 drives the transmission shaft 810 and the power gear 809 to rotate, the power gear 809 drives the four gears 808 and the four worms 807 to rotate, the four worms 807 together drive the conjoined double worm wheel 804 to rotate, the conjoined double worm wheel 804 drives the two power shafts 805 to rotate, the power shaft 805 drives the power transmission plate 806 to rotate, the power transmission plate 806 drives the connecting rod 13 to move up and down through the pin shaft 14 and also to swing left and right around the fixed shaft two 11, meanwhile, the connecting rod 13 also drives the walking beam 4 to swing around a fixed shaft 202 like a seesaw through the fixed shaft two 11 (the horse head at the left, the balance weight is a mature structure in the prior art, and is not described under the condition that the structure of the balance weight is not affected, when the walking beam 4 swings up and down, the pull rod 6 can pull and push the balance weight 5 to slide left and right on the walking beam 4, the connecting rod 13 can drive the balance weight ball 17 to swing left and right at the lower end of the walking beam 4 through the threaded sleeve 18, the adjusting screw rod 19 and the connecting rod 16 while swinging left and right, when the balance weight 5 and the balance weight ball 17 are positioned at the highest point of the horse head at the left end of the walking beam 4 (as shown in fig. 11), the gravity centers of the balance weight 5 and the balance weight ball 17 are all closest to the first fixed shaft 202, at the moment, when the action of gravity of the horse head at the left end of the walking beam 4 is greater than that at other times, the right end of the walking beam 4 just swings up around the first fixed shaft 202, the motor 816 can output smaller power to drive other components to operate, so as to, the counterweight 5 and the counterweight ball 17 play a counterweight role, so that the power output of the motor 816 is reduced, when the horsehead of the counterweight 5 and the counterweight ball 17 at the left end of the walking beam 4 is at the lowest point (as shown in fig. 9), the gravity centers of the counterweight 5 and the counterweight ball 17 are far away from the first fixed shaft 202, at the moment, the gravity effect of the horsehead at the left end of the walking beam 4 is smaller than that of other horseheads, the right end of the walking beam 4 just swings downwards around the first fixed shaft 202, the motor 816 outputs smaller power to drive other components to operate, so that the right end of the walking beam 4 is pulled to swing downwards, the horsehead at the left end of the walking beam 4 swings upwards, the counterweight 5 and the counterweight ball 17 play a counterweight role, so that the power output of the motor 816 is reduced, the worm wheel and the worm are used for power transmission, the structure of the conjoined double worm wheel 804 is also adopted for power output, the stability and reliability of the whole power transmission are, the power consumption of the motor 816 is reduced, the electric energy is saved, the manufacturing cost is low, and the electric vehicle is suitable for popularization and use.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.