Electric push rod speed regulating device for agricultural machinery HST stepless speed change

Abstract

The utility model discloses an electric push rod speed regulating device for agricultural machinery HST stepless speed change. The electric push rod speed regulating device comprises an electric push rod body, a speed regulating assembly and a connecting assembly. The electric push rod body comprises a bottom shell, a shell, a motor and a lead screw. The shell is fixedly arranged on the bottom shell and is communicated with the bottom shell; the motor is fixedly arranged on the bottom shell through a motor base, and the output end of the motor penetrates through the bottom shell and extends into the bottom shell. The lead screw is rotationally arranged in the shell through a bearing and a plurality of connecting rods, and the end of the lead screw penetrates through the shell and extends into the bottom shell. The speed regulating assembly is arranged in the bottom shell; the speed regulation assembly comprises a speed regulation block A, a speed regulation block B and a transmission belt; the speed regulation block A is fixedly connected with the output end of the motor; the speed regulating block B is fixedly connected with the end part of the screw rod; the transmission belt is in transmission connection with the speed regulation block A and the speed regulation block B; the electric push rod speed regulation device for the agricultural machinery HST stepless speed change is simple and reasonable in structure, ingenious in design and high in adaptability, and the speed of the electric push rod body can be regulated according to the differential principle.

Description

Technical Field

[0001] The utility model relates to the technical field of HST continuously variable speed change of agricultural machinery, in particular to an electric push rod speed regulating device for HST continuously variable speed change of agricultural machinery. Background Art

[0002] Agricultural machinery HST continuously variable transmission is a common continuously variable transmission technology in agricultural machinery, mainly used for low-power gardening equipment and agricultural machinery. Its working principle is to achieve speed change through a hydraulic system. Specifically, the HST system consists of a hydraulic pump, a hydraulic motor and a control system. The hydraulic pump converts mechanical energy into hydraulic energy, and then the hydraulic motor converts the hydraulic energy into mechanical energy, thereby achieving continuously variable speed change. By adjusting the pressure and flow of the hydraulic oil output by the hydraulic pump, the output speed of the hydraulic motor can be controlled, thereby achieving continuously variable speed change.

[0003] For example, Chinese invention patent publication number CN110566661 B describes an electric pushrod speed control device for HST continuously variable transmission agricultural machinery. The pushrod is hinged to the crank plate of the speed control handle and the rocker of the HST continuously variable transmission, respectively. A linear displacement sensor is placed alongside the pushrod to measure its displacement. An electromagnet-driven U-shaped fork rests against the short right-angle transition groove of the parking position. Four strain gauges form a measuring bridge on the front and rear sides of the speed control handle, 15 mm above the panel, to sense whether the handle is being pushed forward or pulled backward. The differential signal from the bridge is amplified by an instrumentation amplifier chip in the ECU and then collected by a single-chip microcomputer. A program determines whether the U-shaped fork should be pulled to shift the vehicle from parking to forward movement, or vice versa. When the speed control handle is in parking, the program receives commands from the CAN interface or UART serial port to control the vehicle's motion. This device combines manual and computer-controlled speed control, solving the speed control problem of unmanned agricultural machinery.

[0004] In order to improve the operating efficiency and accuracy of the HST continuously variable transmission of agricultural machinery, an electric push rod is usually installed on the HST continuously variable transmission of agricultural machinery. However, the speed of the existing electric push rods is mostly fixed, and it is difficult to adjust the speed of the electric push rod. This not only fails to meet the needs of different usage scenarios, but also reduces the applicability of the electric push rod, thereby affecting the use effect of the electric push rod. Utility Model Content

[0005] The purpose of the utility model is to address the deficiencies of the existing technology and provide an agricultural machinery HST stepless speed electric push rod speed regulating device to achieve the purpose of improving the applicability of the electric push rod.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an electric push rod speed regulation device for agricultural machinery HST stepless speed change, comprising an electric push rod body, a speed regulation assembly and a connecting assembly for agricultural machinery HST stepless speed change; the electric push rod body comprises a bottom shell, an outer shell, an electric motor and a screw rod; the outer shell is fixed on the bottom shell and communicates with the bottom shell; the electric motor is fixed on the bottom shell through a motor seat, and the output end of the motor extends through the bottom shell to the inside of the bottom shell; the screw rod is rotatably arranged in the outer shell through a bearing and a plurality of connecting rods, and the end of the screw rod extends through the outer shell to the bottom shell; the speed regulation assembly is arranged in the bottom shell; the speed regulation assembly comprises a speed regulation block A, a speed regulation block B and a transmission belt; the speed regulation block A is fixedly connected to the output end of the motor; the speed regulation block B is fixedly connected to the end of the screw rod; the transmission belt is transmission-connected to the speed regulation block A and the speed regulation block B, and the transmission belt is connected to the bottom shell through the connecting assembly.

[0007] Preferably, the electric push rod body also includes a push rod; the push rod is slidably arranged in the shell through a plurality of keys, and the end of the push rod extends to the outside through the shell; the push rod is a T-shaped structure with a small upper part and a large lower part.

[0008] Preferably, the speed regulating block A and the speed regulating block B are both truncated cone structures, and the speed regulating block A and the speed regulating block B are centrally symmetrically arranged.

[0009] Preferably, a plurality of tooth blocks are provided on the circumferential surface of the speed regulating block A and the circumferential surface of the speed regulating block B, and a plurality of tooth grooves are provided on the inner side of the transmission belt, and the tooth blocks mesh with the tooth grooves and rotate.

[0010] Preferably, the connecting assembly includes a movable plate, a through-hole groove, a screw, a rotating block and a rotating groove; the movable plate is slidably arranged in the bottom shell; two through-hole grooves are symmetrically provided on the movable plate, and the transmission belt slides in cooperation with the two through-hole grooves; the screw is passed through the movable plate, and one end of the screw extends to the outside through the bottom shell; the screw is threadedly connected to the movable plate; the rotating block is fixedly connected to the other end of the screw; a rotating groove is provided on the bottom wall of the bottom shell; the rotating block rotates in cooperation with the rotating groove.

[0011] Preferably, the rotating block is a T-shaped structure with a small upper portion and a large lower portion.

[0012] Preferably, the connecting assembly further comprises a rotating knob; the rotating knob is fixedly connected to the end of the screw away from the rotating block.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model provides a speed regulating assembly. If it is necessary to increase the speed of the electric push rod body, the transmission belt is moved upward on the speed regulating block A and the speed regulating block B through the connecting assembly, so that the contact portion of the transmission belt with the speed regulating block A is increased and the contact portion with the speed regulating block B is reduced, thereby achieving an increase in the speed of the electric push rod body. If it is necessary to reduce the speed of the electric push rod body, the transmission belt is moved downward on the speed regulating block A and the speed regulating block B through the connecting assembly, so that the contact portion of the transmission belt with the speed regulating block A is reduced and the contact portion with the speed regulating block B is increased, thereby achieving a decrease in the speed of the electric push rod body. Compared with the existing technology, the utility model has a simple and reasonable structure and an ingenious design. It can adjust the speed of the electric push rod body by utilizing the differential principle and has strong adaptability.

[0015] 2. The utility model sets a connecting component. By rotating the rotating knob, the rotating knob drives the screw to rotate, so that the rotating block rotates in the rotating groove, the screw is threadedly connected to the movable plate, and the movable plate slides in the bottom shell, so that the transmission belt can move on the speed regulating block A and the speed regulating block B, so as to facilitate the change of the position of the transmission belt on the speed regulating block A and the speed regulating block B, thereby realizing the speed regulating function of the electric push rod body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a cross-sectional view of the overall structure of the utility model;

[0018] Figure 3 This is a partial structural sectional view of the present invention;

[0019] Figure 4 For the utility model Figure 2 Enlarged schematic diagram of point A in the middle.

[0020] In the picture:

[0021] 1. Electric push rod body; 2. Speed ​​control assembly; 3. Connection assembly;

[0022] 101. bottom shell; 102. outer shell; 103. motor; 104. screw rod; 105. push rod;

[0023] 201, speed regulating block A; 202, speed regulating block B; 203, transmission belt;

[0024] 301. Movable plate; 302. Through-hole slot; 303. Screw; 304. Rotating block; 305. Rotating slot; 306. Rotating knob. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1 to 4 The utility model provides a technical solution: an electric push rod speed regulating device for HST stepless speed change of agricultural machinery, comprising an electric push rod body 1, a speed regulating assembly 2 and a connecting assembly 3 for HST stepless speed change of agricultural machinery; the electric push rod body 1 comprises a bottom shell 101, an outer shell 102, an electric motor 103, a screw rod 104 and a pushing rod 105; the outer shell 102 is fixed on the bottom shell 101 and communicates with the bottom shell 101; the electric motor 103 is fixed on the bottom shell 101 through a motor base, and the output end of the electric motor 103 extends to the inside of the bottom shell 101 through the bottom shell 101; the screw rod 104 is rotatably arranged in the shell 102 through a bearing and a plurality of connecting rods, and the end of the screw rod 104 extends to the bottom shell 101 through the shell 102; the pushing rod 105 is slidably arranged in the shell 102 through three keys, and the end of the pushing rod 105 extends to the outside through the shell 102; the pushing rod 105 is small at the top and large at the bottom T-shaped structure; the speed regulating assembly 2 is arranged in the bottom shell 101; the speed regulating assembly 2 includes a speed regulating block A201, a speed regulating block B202 and a transmission belt 203; the speed regulating block A201 is fixedly connected to the output end of the motor 103; the speed regulating block B202 is fixedly connected to the end of the screw rod 104; the transmission belt 203 is connected to the speed regulating block A201 and the speed regulating block B202, and the transmission belt 203 is connected to the bottom shell 101 through the connecting assembly 3; the speed regulating block A20 1 and the speed regulating block B202 are both of a frustum-type structure, and the speed regulating blocks A201 and the speed regulating blocks B202 are arranged symmetrically with respect to the center, so as to facilitate the adjustment of the speed of the electric push rod body 1; a plurality of tooth blocks are arranged on the circumferential surface of the speed regulating blocks A201 and the circumferential surface of the speed regulating blocks B202, and a plurality of tooth grooves are arranged on the inner side of the transmission belt 203, and the tooth blocks are engaged and rotated with the tooth grooves to improve the connection stability between the transmission belt 203 and the speed regulating blocks A201 and the speed regulating blocks B202.

[0027] The utility model sets a speed regulating component 2. If it is necessary to increase the speed of the electric push rod body 1, the transmission belt 203 is moved upward on the speed regulating block A201 and the speed regulating block B202 through the connecting component 3, so that the contact portion of the transmission belt 203 with the speed regulating block A201 is increased and the contact portion with the speed regulating block B202 is reduced, thereby achieving an increase in the speed of the electric push rod body 1. If it is necessary to reduce the speed of the electric push rod body 1, the transmission belt 203 is moved downward on the speed regulating block A201 and the speed regulating block B202 through the connecting component 3, so that the contact portion of the transmission belt 203 with the speed regulating block A201 is reduced and the contact portion with the speed regulating block B202 is increased, thereby achieving a decrease in the speed of the electric push rod body 1. Compared with the prior art, the utility model has a simple and reasonable structure and a clever design. It can adjust the speed of the electric push rod body 1 by utilizing the differential principle and has strong adaptability.

[0028] As a preferred embodiment, the connecting assembly 3 includes a movable plate 301, a through-hole slot 302, a screw 303, a rotating block 304, a rotating slot 305 and a rotating button 306; the movable plate 301 is slidably arranged in the bottom shell 101; two through-hole slots 302 are symmetrically provided on the movable plate 301, and the transmission belt 203 slides with the two through-hole slots 302; the screw 303 is passed through the movable plate 301, and one end of the screw 303 passes through the bottom shell 101 and extends to the outside; the screw 303 is threadedly connected to the movable plate 301 ; The rotating block 304 is fixedly connected to the other end of the screw 303; a rotating groove 305 is provided on the inner bottom wall of the bottom shell 101; the rotating block 304 rotates in cooperation with the rotating groove 305; the rotating block 304 is a T-shaped structure with a small top and a large bottom; the rotating button 306 is fixedly connected to the end of the screw 303 away from the rotating block 304, so as to facilitate limiting the position of the screw 303 and the movable plate 301; the thickness of the transmission belt 203 is greater than the distance between the speed regulating block A201 and the speed regulating block B202 and the inner wall of the bottom shell 101.

[0029] The utility model provides a connecting component 3, and by rotating the rotating button 306, the rotating button 306 drives the screw 303 to rotate, and the rotating block 304 rotates in the rotating groove 305, so that the screw 303 is threadedly connected to the movable plate 301, and the movable plate 301 slides in the bottom shell 101, so that the transmission belt 203 can move on the speed regulating block A201 and the speed regulating block B202, so as to facilitate the change of the position of the transmission belt 203 on the speed regulating block A201 and the speed regulating block B202, thereby realizing the speed regulation function of the electric push rod body 1.

[0030] Working principle: During use, if the speed of the electric push rod body 1 needs to be increased, by turning the rotating knob 306, the rotating knob 306 drives the screw 303 to rotate, and the rotating block 304 rotates in the rotating groove 305, so that the screw 303 is threadedly connected to the movable plate 301, and the movable plate 301 slides upward in the bottom shell 101, so that the transmission belt 203 moves upward on the speed regulating block A201 and the speed regulating block B202, so that the contact part of the transmission belt 203 with the speed regulating block A201 is increased and the contact part with the speed regulating block B202 is reduced, thereby achieving the speed increase of the electric push rod body 1. If the speed of the electric push rod body 1 needs to be reduced, the rotating knob 306 is turned in the opposite direction to reduce the contact part of the transmission belt 203 with the speed regulating block A201 and increase the contact part with the speed regulating block B202, thereby achieving the speed reduction of the electric push rod body 1.

[0031] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric push rod speed regulating device for agricultural machinery HST stepless speed change, characterized in that: The invention comprises an electric push rod body (1) for HST stepless speed change of agricultural machinery, a speed regulating assembly (2) and a connecting assembly (3); the electric push rod body (1) comprises a bottom shell (101), an outer shell (102), an electric motor (103) and a screw rod (104); the outer shell (102) is fixed on the bottom shell (101) and communicates with the bottom shell (101); the electric motor (103) is fixed on the bottom shell (101) through a motor base, and the output end of the electric motor (103) passes through the bottom shell (101) and extends into the inside of the bottom shell (101); the screw rod (104) is rotatably arranged in the outer shell (102) through a bearing and a plurality of connecting rods. The end of the screw rod (104) passes through the outer shell (102) and extends into the bottom shell (101); the speed regulating assembly (2) is arranged in the bottom shell (101); the speed regulating assembly (2) comprises a speed regulating block A (201), a speed regulating block B (202) and a transmission belt (203); the speed regulating block A (201) is fixedly connected to the output end of the motor (103); the speed regulating block B (202) is fixedly connected to the end of the screw rod (104); the transmission belt (203) is transmission-connected to the speed regulating block A (201) and the speed regulating block B (202), and the transmission belt (203) is connected to the bottom shell (101) via a connecting assembly (3).

2. The electric push rod speed regulating device for agricultural machinery HST stepless speed change according to claim 1 is characterized in that: The electric push rod body (1) further comprises a push rod (105); the push rod (105) is slidably arranged in the housing (102) via a plurality of keys, and the end of the push rod (105) passes through the housing (102) and extends to the outside; the push rod (105) is a T-shaped structure with a small upper portion and a large lower portion.

3. The electric push rod speed regulating device for agricultural machinery HST stepless speed change according to claim 1, characterized in that: The speed regulating block A (201) and the speed regulating block B (202) are both truncated cone structures, and the speed regulating block A (201) and the speed regulating block B (202) are centrally symmetrically arranged.

4. The electric push rod speed regulating device for agricultural machinery HST stepless speed change according to claim 3, characterized in that: A plurality of tooth blocks are provided on the circumferential surfaces of the speed regulating block A (201) and the speed regulating block B (202), and a plurality of tooth grooves are provided on the inner side of the transmission belt (203), and the tooth blocks mesh with the tooth grooves for rotation.

5. The electric push rod speed regulating device for agricultural machinery HST stepless speed change according to claim 4, characterized in that: The connecting assembly (3) comprises a movable plate (301), a through-hole groove (302), a screw rod (303), a rotating block (304) and a rotating groove (305); the movable plate (301) is slidably arranged in the bottom shell (101); two through-hole grooves (302) are symmetrically provided on the movable plate (301), and the transmission belt (203) is slidably matched with the two through-hole grooves (302); the screw rod (303) is passed through the movable plate (301), and one end of the screw rod (303) passes through the bottom shell (101) and extends to the outside; the screw rod (303) is threadedly connected to the movable plate (301); the rotating block (304) is fixedly connected to the other end of the screw rod (303); a rotating groove (305) is provided on the inner bottom wall of the bottom shell (101); the rotating block (304) is rotatably matched with the rotating groove (305).

6. The electric push rod speed regulating device for agricultural machinery HST stepless speed change according to claim 5, characterized in that: The rotating block (304) is a T-shaped structure with a small upper portion and a large lower portion.

7. The electric push rod speed regulating device for HST continuously variable speed of agricultural machinery according to claim 6, characterized in that: The connecting assembly (3) further comprises a rotating knob (306); the rotating knob (306) is fixedly connected to an end of the screw rod (303) away from the rotating block (304).

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