HST type gearbox for field orchard management agricultural machinery

Abstract

An HST type gearbox for field and orchard management agricultural machinery comprises a gearbox assembly, a continuously variable transmission, a linear motor control assembly, a brake and a positioning clutch sleeve, and the gearbox assembly comprises a box body, a box cover assembly, a first shaft assembly, a second shaft assembly, a third shaft assembly, a fourth shaft assembly, a fifth shaft assembly, a PTO output belt wheel shaft assembly and a shifting fork shaft assembly. By combining the continuously variable transmission and a traditional gearbox, the continuously variable transmission function under high and low gears is achieved, the high and low gears are achieved, the low gear is used for working conditions, the high gear is used for transition, the two sets of independent PTO output ends are arranged for providing power output, continuously variable transmission of the walking speed of agricultural machinery is achieved, and the agricultural machinery is more stable in running. The function of smoothly adjusting the speed can be achieved through two modes of original handle adjustment and additional linear motor action with position feedback.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural machinery, and in particular to an HST type gearbox for agricultural machinery used for field orchard management. Background Art

[0002] The gearbox commonly used in agricultural machinery on the market is still a mechanical gearbox. Mechanical gearboxes have many internal gears and a fixed transmission ratio. Manual gear shifting is required to adjust the speed. The operation is complicated and requires the driver to change gears frequently. The operating efficiency is relatively low. Due to the limited gear positions, stepless speed change cannot be achieved, resulting in poor performance under complex agricultural terrain and changeable working conditions, which does not conform to the future trend of unmanned intelligent driving.

[0003] To this end, the present invention designs an HST type gearbox for field orchard management agricultural machinery, which adopts the HST, a relatively economical and compact stepless speed change scheme, simplifies the transmission structure, greatly reduces the number of gears, and adjusts the output speed of the hydraulic motor by adjusting the flow rate of the hydraulic oil output by the hydraulic pump to achieve smooth stepless speed change, which meets the intelligent driving design requirements of future agricultural machinery. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art. To this end, the purpose of the present invention is to provide an HST type gearbox for field orchard management agricultural machinery, so as to solve the technical problem that the gearbox transmission structure used in the original agricultural machinery cannot achieve smooth stepless speed change output power of the agricultural machinery.

[0005] The present invention is achieved through the following technical solutions:

[0006] An HST type gearbox for field orchard management agricultural machinery, comprising a gearbox assembly, a continuously variable transmission, a linear motor operating component, a brake and a positioning clutch sleeve, the gearbox assembly comprising a box body, a box cover component, a first shaft component, a second shaft component, a third shaft component, a fourth shaft component, a fifth shaft component, a PTO output pulley shaft component and a fork shaft component, the top surface of the box body is installed with a box cover component, two opposite fixed sides of the box body are provided with fixing ears, two opposite mounting surfaces of the box body are respectively coaxially opened with a pair of power input ports, power output ports, second shaft mounting ports, transmission output shaft mounting ports, fourth shaft mounting ports, PTO pulley high-speed output ports and PTO pulley low-speed output ports, and one shaft component, a fifth shaft component, a second shaft component, the output shaft component of the continuously variable transmission, the fourth shaft component, the third shaft component and the PTO output pulley shaft component are respectively installed correspondingly, one end of the first shaft component is connected to The output shaft is connected to the engine, and the other end thereof is transmitted to the two-shaft assembly and the three-shaft assembly respectively through gear transmission. One end of the two-shaft assembly is spline-connected with the input shaft of the continuously variable transmission, and the input shaft assembly of the continuously variable transmission is connected to the four-shaft assembly through gear transmission. The four-shaft assembly and the five-shaft assembly are meshed and transmitted through two sets of gears, which correspond to the high-speed gear and the low-speed gear of the gearbox respectively, and the spline shaft sleeve gear on the five-shaft assembly is shifted by the shift fork shaft assembly to produce a shifting action. One end of the five-shaft assembly is connected to the brake and the front drive axle in sequence, and the other end of the five-shaft assembly is connected to the rear drive axle. The shift fork shaft assembly is fixed to the mounting surface of the box body corresponding to the opening separately provided. The linear motor operating assembly is fixed to the box body, and a part of it is rotationally connected to the continuously variable transmission to adjust its flow rate. The positioning clutch sleeve passes through one end of the one-shaft assembly and is fixed to the mounting surface of the box body.

[0007] Preferably, the shaft assembly includes an input shaft, a gear, a washer, a shaft retaining ring, a left bearing, a hole retaining ring, a sealing cover, an adjusting washer, a right bearing and a skeleton oil seal, and is sequentially installed from both ends and fixed at the power input port position.

[0008] Preferably, the two-shaft assembly includes a sealing end cover, a right bearing, a gear shaft, a spline sleeve, a left bearing, a shaft retaining ring and a sealing sleeve, which are sequentially installed from both ends and fixed at the two-shaft mounting port position. The gear shaft is meshed with the gear in one shaft assembly, and the spline sleeve is spline-matched with the input shaft of the continuously variable transmission for transmission.

[0009] Preferably, the output shaft assembly on the continuously variable transmission includes a rolling bearing, an output gear, a retaining ring, an adjustment gasket and a shaft retaining ring which are fixed on the output shaft in sequence, the input shaft is spline-connected to the spline sleeve on the two-shaft assembly, and the output gear is connected to the five-shaft assembly through a gear transmission.

[0010] Preferably, the three-shaft assembly includes a sealing end cover, a right bearing, a bearing spacer, an internal spline pinion, a short spline shaft, a left bearing and a bearing end cover, and is sequentially installed from both ends and fixed at the high-speed output port of the PTO pulley. The internal spline pinion is meshed with the gear, the bearing end cover can be replaced with a shaft sealing end cover, and the short spline shaft can be replaced with a long spline shaft and a flat key as the second output of the PTO.

[0011] Preferably, the PTO output pulley shaft assembly includes a sealing end cover, a bearing, a bearing spacer, a PTO output shaft, a flat key, an internal spline gear, a gear spacer, a first shaft retaining ring, a hole retaining ring, a skeleton oil seal, a pulley, a second shaft retaining ring and a set screw, and is sequentially installed from both ends and fixed at the low-speed output port position of the PTO pulley. The internal spline gear is splined to the flat key portion on the PTO output shaft, and is meshed with the internal spline pinion in the three-shaft assembly. The shaft head on the PTO output shaft close to the pulley position is constructed as a spline structure, and the second shaft retaining ring and set screw are used to axially fix the pulley on the PTO output shaft.

[0012] Preferably, the four-axis assembly includes a left end cover, a left bearing, an internal spline gear, an internal spline pinion, a gear spacer, an internal spline gear, a spline shaft, a right bearing and a right end cover, and is sequentially installed and fixed to the four-axis mounting port from both ends, and the internal spline gear, the internal spline pinion, the internal spline gear and the spline shaft are meshed through splines, wherein the internal spline gear is meshed with the output gear in the continuously variable transmission.

[0013] Preferably, the five-axis assembly also includes a left bearing, a spacer, a first rolled sleeve, a single-sided spline sleeve large gear, an output spline shaft, a second rolled sleeve, a single-sided spline sleeve small gear, a right bearing, a sealing large end cover assembly, a connecting flange, a large gasket, a slotted nut and a cotter pin, which are sequentially installed from both ends and fixed to the power output port. The single-sided spline sleeve large gear is connected to the output spline shaft through the first rolled sleeve, and the single-sided spline sleeve small gear is connected to the output spline shaft through the second rolled sleeve. Both are in a free rotation state, and the spline sleeve gear is splined to the output spline shaft The middle section of the spline sleeve gear is constructed as a clamping portion, and the fork end on the fork shaft assembly is forked into the clamping portion, so that the spline sleeve gear slides axially on the output spline shaft, and the single-sided spline sleeve large gear is meshed with the internal spline small gear in the four-axis assembly, and the single-sided spline sleeve small gear is meshed with the internal spline large gear in the four-axis assembly, forming two gears of low speed and high speed respectively. When the spline sleeve gear is meshed with the single-sided spline sleeve large gear, a low speed gear is formed, and when the spline sleeve gear is meshed with the single-sided spline sleeve small gear, a high speed gear is formed. The connecting flange is used to connect to an external output.

[0014] The beneficial effects of the present invention are:

[0015] The present invention realizes the continuously variable speed function under high and low speed gears by combining a continuously variable transmission and a traditional gearbox. The transmission structure has a reasonable and compact layout and has two gears, high and low speed. The low speed is used for working conditions, and the high speed is used for transition. In addition, the PTO output function is designed with two groups of independent PTO output ends for providing power output, one of which is a low-speed and high-torque output to meet the needs of different working conditions, and the other group is a reserved port for high-speed and low-torque output, which can be achieved by replacing the shaft. The stepless speed change of the walking speed of agricultural machinery is realized, and the operation of mechanical gearbox shifting is simplified. The smooth speed adjustment function can be achieved through two methods: the original handle adjustment and the added linear motor action with position feedback. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of an HST type gearbox for a field orchard management agricultural machine of the present invention;

[0017] Figure 2 It is an assembly view of an HST type gearbox of the present invention for a field orchard management agricultural machine from one perspective;

[0018] Figure 3 It is another perspective assembly drawing of the HST type gearbox of the present invention for field orchard management agricultural machinery;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the box body of the present invention;

[0020] Figure 5 It is an assembly diagram of the box of the present invention;

[0021] Figure 6 It is a front view structural schematic diagram of one of the mounting surfaces of the box body of the present invention;

[0022] Figure 7 It is a schematic diagram of the gear transmission between the first shaft assembly, the second shaft assembly, the continuously variable transmission, the fourth shaft assembly, and the fifth shaft assembly of the present invention;

[0023] Figure 8 It is a schematic diagram of the gear transmission between the one-shaft assembly, the three-shaft assembly, and the PTO output pulley shaft assembly of the present invention;

[0024] Fig. 9 It is a three-dimensional structural schematic diagram of the transmission components of the present invention assembled on the box body;

[0025] Fig.10 It is a structural schematic diagram of a shaft assembly of the present invention being assembled to a power input port a of a box;

[0026] Fig.11 It is a structural schematic diagram of the two-axis assembly of the present invention being assembled to the two-axis mounting opening c of the box;

[0027] Fig.12 It is a structural schematic diagram of the continuously variable transmission of the present invention being assembled to the transmission output shaft mounting opening d of the housing;

[0028] Fig.13 It is a structural schematic diagram of the three-axis assembly of the present invention being assembled to the PTO pulley high-speed output port f of the box;

[0029] Fig.14 It is a structural schematic diagram of the four-axis assembly of the present invention being assembled on the four-axis mounting opening e of the box;

[0030] Fig.15 It is a structural schematic diagram of the five-axis assembly of the present invention being assembled at the power output port b of the box;

[0031] Fig.16 It is a three-dimensional structural schematic diagram of the spline shaft sleeve gear of the present invention;

[0032] Fig.17 It is a structural schematic diagram of the PTO output pulley shaft assembly of the present invention being assembled to the PTO pulley low-speed output port g of the box body.

[0033] In the figure, the gearbox assembly 1, the continuously variable transmission 2, the input shaft 201, the output shaft 202, the rolling bearing 203, the output gear 204, the retaining ring 205, the adjusting gasket 206, the shaft retaining ring 207, the linear motor operating component 3, the brake 4, the positioning clutch sleeve 5, the box body 101, the fixing ear 10101, the box cover assembly 102, the fork shaft assembly 109, the power input port a, the power output port b, the second shaft installation port c, the transmission output shaft installation port d, the fourth shaft installation port e, the PTO pulley high-speed output port f, and the PTO pulley low-speed output port g;

[0034] A shaft assembly 103: input shaft 10301, gear 10302, washer 10303, shaft retaining ring 10304, left bearing 10305, hole retaining ring 10306, sealing cover 10307, ​​adjusting washer 10308, right bearing 10309, skeleton oil seal 10310;

[0035] Second shaft assembly 104: sealing end cover 10401, right bearing 10402, gear shaft 10403, spline sleeve 10404, left bearing 10405, shaft retaining ring 10406, sealing sleeve 10407;

[0036] Three-shaft assembly 105: sealing end cover 10501, right bearing 10502, bearing spacer 10503, internal spline pinion 10504, short spline shaft 10505, left bearing 10506, bearing end cover 10507;

[0037] Four-shaft assembly 106: left end cover 10601, left bearing 10602, internal spline gear 10603, internal spline small gear 10604, gear spacer 10605, internal spline large gear 10606, spline shaft 10607, right bearing 10608, right end cover 10609;

[0038] Five-axis assembly 107: left bearing 10701, spacer 10702, first rolled sleeve 10703, single-sided spline sleeve large gear 10704, output spline shaft 10706, second rolled sleeve 10707, single-sided spline sleeve small gear 10708, right bearing 10709, sealing large end cover assembly 10710, connecting flange 10711, large washer 10712, slotted nut 10713, cotter pin 10714;

[0039] PTO output pulley shaft assembly 108: sealing end cover 10801, bearing 10802, bearing spacer 10803, PTO output shaft 10804, flat key 10805, internal spline large gear 10806, gear spacer 10807, retaining ring for first shaft 10808, retaining ring for hole 10809, skeleton oil seal 10810, pulley 10811, retaining ring for second shaft 10812, set screw 10813. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0041] The technical solution of the present invention is further described below in conjunction with the accompanying drawings. Figure 1-17The invention shows an HST type gearbox for field orchard management agricultural machinery, including a gearbox assembly 1, a continuously variable transmission 2, a linear motor operating assembly 3, a brake 4 and a positioning clutch sleeve 5. The gearbox assembly 1 includes a box body 101, a box cover assembly 102, a first shaft assembly 103, a second shaft assembly 104, a third shaft assembly 105, a fourth shaft assembly 106, a fifth shaft assembly 107, a PTO output pulley shaft assembly 108 and a fork shaft assembly 109. The top surface of the box body 101 is equipped with a box cover assembly 102. The box body 101 is provided with a first shaft assembly 103, a second shaft assembly 104, a third shaft assembly 105, a fourth shaft assembly 106, a fifth shaft assembly 107, a PTO output pulley shaft assembly 108 and a fork shaft assembly 109. The two opposite fixing sides of the housing 101 are provided with fixing ears 10101, and the two opposite mounting surfaces of the housing 101 are respectively coaxially provided with a pair of power input ports a, power output ports b, second-axis mounting ports c, transmission output shaft mounting ports d, fourth-axis mounting ports e, PTO pulley high-speed output ports f and PTO pulley low-speed output ports g, which are respectively correspondingly provided with a first-axis assembly 103, a fifth-axis assembly 107, a second-axis assembly 104, an output shaft assembly of the continuously variable transmission 2, a fourth-axis assembly 106, a third-axis assembly 105 and a PTO output pulley shaft The first shaft assembly 108 has one end connected to the output shaft of the engine, and the other end thereof is transmitted to the second shaft assembly 104 and the third shaft assembly 105 respectively through gear transmission. One end of the second shaft assembly 104 is spline-connected to the input shaft of the continuously variable transmission 2, and the input shaft assembly of the continuously variable transmission 2 is connected to the fourth shaft assembly 106 through gear transmission. The fourth shaft assembly 106 and the fifth shaft assembly 107 are meshed with two sets of gears, which correspond to the high speed gear and the low speed gear of the gearbox respectively, and the fifth shaft is shifted by the fork shaft assembly 109. The spline shaft sleeve gear 10705 on the component 107 produces a gear shifting action. One end of the five-axis component 107 is connected to the brake 4 and the front drive axle in sequence, and the other end of the five-axis component 107 is connected to the rear drive axle. The fork shaft component 109 is fixed to a corresponding opening on the mounting surface of the housing 101. The linear motor operating component 3 is fixed to the housing 101, and a part of it is rotatably connected to the continuously variable transmission 2 to adjust its flow rate. The positioning clutch sleeve 5 passes through one end of an axis component 103 and is fixed to the mounting surface of the housing 101.

[0042] like Fig.10 A shaft assembly 103 includes an input shaft 10301, a gear 10302, a washer 10303, a shaft retaining ring 10304, a left bearing 10305, a hole retaining ring 10306, a sealing cover 10307, ​​an adjusting washer 10308, a right bearing 10309 and a skeleton oil seal 10310, and is sequentially installed from both ends and fixed at the power input port a position.

[0043] like Fig.11The second shaft assembly 104 includes a sealing end cover 10401, a right bearing 10402, a gear shaft 10403, a spline sleeve 10404, a left bearing 10405, a shaft retaining ring 10406 ​​and a sealing sleeve 10407, which are sequentially installed from both ends and fixed at the second shaft installation port c. The gear shaft 10403 is meshed with the gear 10302 in the first shaft assembly 103, and the spline sleeve 10404 is spline-matched with the input shaft 201 of the continuously variable transmission 2 for transmission.

[0044] like Fig.12 The output shaft assembly on the continuously variable transmission 2 includes a rolling bearing 203, an output gear 204, a retaining ring 205, an adjustment washer 206 and a shaft retaining ring 207 which are fixed on the output shaft 202 in sequence. The input shaft 201 is spline-connected with the spline sleeve 10404 on the second shaft assembly 104, and the output gear 204 is connected with the five-shaft assembly 107 through gear transmission. It is worth mentioning that the continuously variable transmission 2 is not limited to a mechanical swash plate, and a hydraulically controlled or electronically controlled swash plate type continuously variable transmission is also applicable.

[0045] like Fig.13 The three-axis assembly 105 includes a sealing end cover 10501, a right bearing 10502, a bearing spacer 10503, an internal spline pinion 10504, a short spline shaft 10505, a left bearing 10506 and a bearing end cover 10507, which are sequentially installed from both ends and fixed at the PTO pulley high-speed output port f position. The internal spline pinion 10504 is meshed with the gear 10302, the bearing end cover 10507 can be replaced with a shaft sealing end cover 10510, and the short spline shaft 10505 can be replaced with a long spline shaft 10508 and a flat key 10509. As the second output of the PTO, the port function can be realized by replacing the above three parts.

[0046] like Fig.17The PTO output pulley shaft assembly 108 includes a sealing end cover 10801, a bearing 10802, a bearing spacer 10803, a PTO output shaft 10804, a flat key 10805, an internal spline gear 10806, a gear spacer 10807, a first shaft retaining ring 10808, a hole retaining ring 10809, a skeleton oil seal 10810, a pulley 10811, a second shaft retaining ring 10812 and a set screw 10813, and is sequentially installed from both ends and fixed at the low-speed output port g of the PTO pulley. The internal spline gear 10806 is spline-connected to the flat key portion on the PTO output shaft 10804, and is meshed with the internal spline pinion 10504 in the three-shaft assembly 105, which provides better power output applicability by reducing speed and increasing torque. The shaft head near the pulley 10811 on the PTO output shaft 10804 is constructed as a spline structure, and with the flat key transmission in front, the PTO output shaft 10804 provides two states of power output functions at the same time. The second shaft uses a retaining ring 10812 and a set screw 10813 to axially fix the pulley 10811 on the PTO output shaft 10804.

[0047] like Fig.14 The four-axis assembly 106 includes a left end cover 10601, a left bearing 10602, an internal spline gear 10603, an internal spline pinion 10604, a gear spacer 10605, an internal spline large gear 10606, a spline shaft 10607, a right bearing 10608 and a right end cover 10609, and is sequentially installed and fixed in the four-axis installation port e from both ends. The internal spline gear 10603, the internal spline pinion 10604, the internal spline large gear 10606 and the spline shaft 10607 are meshed through splines and have the same rotational angular velocity, wherein the internal spline gear 10603 is meshed with the output gear 204 in the continuously variable transmission 2.

[0048] like Fig.15The five-axis assembly 107 also includes a left bearing 10701, a spacer 10702, a first rolled sleeve 10703, a single-sided spline sleeve large gear 10704, an output spline shaft 10706, a second rolled sleeve 10707, a single-sided spline sleeve small gear 10708, a right bearing 10709, a sealing large end cover assembly 10710, a connecting flange 10711, a large washer 10712, a slotted nut 10713 and a cotter pin 10714, which are sequentially installed from both ends and fixed at the power output port b, the single-sided spline sleeve large gear 10704 and the output spline shaft 10706 are connected by the first rolled sleeve 10703, and the single-sided spline sleeve small gear 10708 and the output spline shaft 10706 are connected by the second rolled sleeve 10707, and both are in a free rotation state. The spline sleeve gear 10705 is spline-connected to the output spline shaft 10706 and is in a synchronous rotation state and an axial sliding state at the same time. The middle section of the spline sleeve gear 10705 is constructed as a clamping portion I, and the fork end 10901 on the fork shaft assembly 109 is forked into the clamping portion I, so that the spline sleeve gear 10705 slides axially on the output spline shaft 10706, and the single-sided spline sleeve large gear 10704 is meshed with the internal spline pinion 10604 in the four-axis assembly 106, and the single-sided spline sleeve pinion 10708 is meshed with the internal spline large gear 10606 in the four-axis assembly 106, forming two gears of low speed and high speed respectively. When the spline sleeve gear 10705 is meshed with the single-sided spline sleeve large gear 10704, a low speed gear is formed, and when the spline sleeve gear 10705 is meshed with the single-sided spline sleeve pinion 10708, a high speed gear is formed, and the connecting flange 10711 is used to connect the external output.

[0049] Working principle of the present invention:

[0050] First look at the assembly, such as Fig. 9 , the one-axis assembly 103, the five-axis assembly 107, the two-axis assembly 104, the output shaft assembly of the continuously variable transmission 2, the four-axis assembly 106, the three-axis assembly 105 and the PTO output pulley shaft assembly 108 are respectively installed on the paired power input port a, the power output port b, the two-axis installation port c, the transmission output shaft installation port d, the four-axis installation port e, the PTO pulley high-speed output port f and the PTO pulley low-speed output port g. Then the box cover assembly 102 is installed on the top surface of the box body 101, the fork shaft assembly 109 is fixed to the corresponding opening on the installation surface of the box body 101, the linear motor operating assembly 3 is fixed on the box body 101, and a part of it is rotatably connected with the continuously variable transmission 2 to adjust its flow, and the positioning clutch sleeve 5 passes through one end of the one-axis assembly 103 and is fixed on the installation surface of the box body 101.

[0051] Looking at the transmission again, combined with Figure 7 and Figure 8One end of the input shaft 10301 in the first shaft assembly 103 is connected to the output shaft of the engine, and the other end thereof is transmitted through the gear 10302 to the spline sleeve 10404 in the second shaft assembly 104 and the internal spline pinion 10504 in the third shaft assembly 105 respectively.

[0052] The spline sleeve 10404 drives the input shaft 201 of the continuously variable transmission 2 to rotate, and the push-pull action of the linear motor operating component 3 realizes the flow control of the continuously variable transmission 2, thereby realizing the smooth adjustment of the output speed, and converting it to the output shaft 202 through internal transmission to transmit a certain speed. The output gear 204 thereon drives the internal spline gear 10603 in the four-axis component 106 to rotate, so that the spline shaft 10607 rotates, and the internal spline small gear 10604 and the internal spline large gear 10606 thereon rotate, thereby driving the spline shaft 10607 to rotate, one end of the spline shaft 10607 is connected to the brake 4 and the front drive axle in sequence, and the other end is connected to the rear drive axle, and finally the power is transmitted to the front and rear drive axles, wherein the brake 4 realizes smooth braking of the spline shaft 10607. The spline sleeve gear 10705 on the five-axis assembly 107 is driven by the shift fork shaft assembly 109 to slide axially on the output spline shaft 10706, producing a gear shifting action. When the spline sleeve gear 10705 is engaged with the single-sided spline sleeve large gear 10704, a low speed gear is formed. When the spline sleeve gear 10705 is engaged with the single-sided spline sleeve small gear 10708, a high speed gear is formed.

[0053] The internal spline small gear 10504 drives the internal spline large gear 10806 in the PTO output pulley shaft assembly 108 to rotate, and then drives the PTO output shaft 10804 to rotate, and finally transmits power to the externally connected water pump and fan, providing a power source for the water pump and the fan.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An HST type gearbox for field orchard management agricultural machinery, characterized in that: The invention comprises a gearbox assembly (1), a continuously variable transmission (2), a linear motor operating assembly (3), a brake (4) and a positioning clutch sleeve (5); the gearbox assembly (1) comprises a box body (101), a box cover assembly (102), a first shaft assembly (103), a second shaft assembly (104), a third shaft assembly (105), a fourth shaft assembly (106), a fifth shaft assembly (107), a PTO output pulley shaft assembly (108) and a shift fork shaft assembly (109); the box cover assembly (102) is installed on the top surface of the box body (101); fixed shafts are provided on two opposite fixed sides of the box body (101); The ear (10101) is provided with a pair of power input ports (a), power output ports (b), second-axis mounting ports (c), transmission output shaft mounting ports (d), fourth-axis mounting ports (e), PTO pulley high-speed output ports (f) and PTO pulley low-speed output ports (g) on ​​two opposite mounting surfaces of the housing (101), and the first-axis assembly (103), the fifth-axis assembly (107), the second-axis assembly (104), the output shaft assembly of the continuously variable transmission (2), the fourth-axis assembly (106), the third-axis assembly (105) and the PTO output pulley shaft assembly (108) are respectively installed correspondingly. One end of the one-shaft assembly (103) is connected to the output shaft of the engine, and the other end thereof is transmitted to the two-shaft assembly (104) and the three-shaft assembly (105) respectively through gear transmission. One end of the two-shaft assembly (104) is spline-connected to the input shaft of the continuously variable transmission (2). The input shaft assembly of the continuously variable transmission (2) is connected to the four-shaft assembly (106) through gear transmission. The four-shaft assembly (106) and the five-shaft assembly (107) are meshed with each other through two sets of gears, which correspond to the high speed gear and the low speed gear of the transmission respectively, and the five-shaft assembly (107) is shifted by the shift fork shaft assembly (109). The spline shaft sleeve gear (10705) produces a gear shifting action, one end of the five-axis assembly (107) is connected to the brake (4) and the front drive axle in sequence, and the other end of the five-axis assembly (107) is connected to the rear drive axle. The fork shaft assembly (109) is fixed to an opening corresponding to a separate opening on the mounting surface of the housing (101). The linear motor operating assembly (3) is fixed to the housing (101), and a part of it is rotatably connected to the continuously variable transmission (2) to adjust its flow rate. The positioning clutch sleeve (5) passes through one end of the shaft assembly (103) and is fixed to the mounting surface of the housing (101).

2. The HST type gearbox for field orchard management agricultural machinery according to claim 1, characterized in that: The shaft assembly (103) comprises an input shaft (10301), a gear (10302), a washer (10303), a shaft retaining ring (10304), a left bearing (10305), a hole retaining ring (10306), a sealing cover (10307), an adjusting washer (10308), a right bearing (10309) and a skeleton oil seal (10310), and is sequentially installed from both ends and fixed at the power input port (a) position.

3. The HST type gearbox for field orchard management agricultural machinery according to claim 2, characterized in that: The two-shaft assembly (104) comprises a sealing end cover (10401), a right bearing (10402), a gear shaft (10403), a spline sleeve (10404), a left bearing (10405), a shaft retaining ring (10406) and a sealing sleeve (10407), which are sequentially installed from both ends and fixed at the position of the two-shaft installation port (c); the gear shaft (10403) is meshed with a gear (10302) in the one-shaft assembly (103); and the spline sleeve (10404) is spline-matched with an input shaft (201) of a continuously variable transmission (2) for transmission.

4. The HST type gearbox for field orchard management agricultural machinery according to claim 3, characterized in that: The output shaft assembly on the continuously variable transmission (2) comprises a rolling bearing (203), an output gear (204), a retaining ring (205), an adjustment gasket (206) and a shaft retaining ring (207) which are fixed on the output shaft (202) in sequence; the input shaft (201) is spline-connected with a spline sleeve (10404) on the two-shaft assembly (104); and the output gear (204) is connected with the five-shaft assembly (107) through gear transmission.

5. The HST type gearbox for field orchard management agricultural machinery according to claim 2, characterized in that: The three-axis assembly (105) includes a sealing end cover (10501), a right bearing (10502), a bearing spacer (10503), an internal spline pinion (10504), a short spline shaft (10505), a left bearing (10506) and a bearing end cover (10507), and is sequentially installed from both ends and fixed at the high-speed output port (f) of the PTO pulley. The internal spline pinion (10504) is meshed with the gear (10302). The bearing end cover (10507) can be replaced by a shaft sealing end cover (10510), and the short spline shaft (10505) can be replaced by a long spline shaft (10508) and a flat key (10509) as the second output of the PTO.

6. The HST type gearbox for field orchard management agricultural machinery according to claim 5, characterized in that: The PTO output pulley shaft assembly (108) comprises a sealing end cover (10801), a bearing (10802), a bearing spacer (10803), a PTO output shaft (10804), a flat key (10805), an internal spline gear (10806), a gear spacer (10807), a first shaft retaining ring (10808), a hole retaining ring (10809), a skeleton oil seal (10810), a pulley (10811), a second shaft retaining ring (10812) and a set screw (10813), and is sequentially installed and fixed from both ends. At the low-speed output port (g) of the PTO pulley, the internal spline gear (10806) is spline-connected to the flat key portion on the PTO output shaft (10804), and is meshed with the internal spline gear (10504) in the three-axis assembly (105). The shaft head on the PTO output shaft (10804) near the pulley (10811) is constructed as a spline structure, and the second shaft uses a retaining ring (10812) and a set screw (10813) to axially fix the pulley (10811) on the PTO output shaft (10804).

7. The HST type gearbox for field orchard management agricultural machinery according to claim 4, characterized in that: The four-axis assembly (106) comprises a left end cover (10601), a left bearing (10602), an internal spline gear (10603), an internal spline pinion gear (10604), a gear spacer (10605), an internal spline gear (10606), a spline shaft (10607), a right bearing (10608) and a right end cover (10609), and is sequentially installed and fixed in the four-axis mounting port (e) from both ends, wherein the internal spline gear (10603), the internal spline pinion gear (10604), the internal spline gear (10606) and the spline shaft (10607) are meshed through splines, wherein the internal spline gear (10603) is meshed with an output gear (204) in the continuously variable transmission (2).

8. The HST type gearbox for field orchard management agricultural machinery according to claim 7, characterized in that: The five-axis assembly (107) further includes a left bearing (10701), a spacer (10702), a first rolled sleeve (10703), a single-sided spline sleeve large gear (10704), an output spline shaft (10706), a second rolled sleeve (10707), a single-sided spline sleeve small gear (10708), a right bearing (10709), a sealing large end cover assembly (10710), a connecting flange (10711), a large washer (10712), a slotted nut ( 10713) and a cotter pin (10714), and are sequentially installed from both ends and fixed to the power output port (b), the single-sided spline sleeve large gear (10704) and the output spline shaft (10706) are connected via a first rolled sleeve (10703), the single-sided spline sleeve small gear (10708) and the output spline shaft (10706) are connected via a second rolled sleeve (10707), and both are in a free rotation state, the spline sleeve gear (1070 5) spline connected to the output spline shaft (10706), the middle section of the spline shaft sleeve gear (10705) is configured as a clamping portion (I), the fork end (10901) on the fork shaft assembly (109) is inserted into the clamping portion (I), so that the spline shaft sleeve gear (10705) slides axially on the output spline shaft (10706), and the single-side spline sleeve large gear (10704) is meshed with the internal spline small gear (10604) in the four-shaft assembly (106), The single-sided spline sleeve small gear (10708) is meshed with the internal spline large gear (10606) in the four-axis assembly (106), forming two gears, low speed and high speed. When the spline shaft sleeve gear (10705) is meshed with the single-sided spline sleeve large gear (10704), a low speed gear is formed, and when the spline shaft sleeve gear (10705) is meshed with the single-sided spline sleeve small gear (10708), a high speed gear is formed. The connecting flange (10711) is used to connect to an external output.

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