CN202251751U - Speed changing box for small-sized agricultural machine - Google Patents

Abstract

A gearbox for small agricultural machinery relates to agricultural implements, in particular to a gearbox applied to small hand-held agricultural implements. A gearbox for small agricultural machinery according to the utility model is characterized in that a power input shaft, a power output shaft, a double gear shaft and a gear set are arranged in the gearbox, and the power input shaft and the power output shaft are arranged horizontally on the transmission shaft. In the middle of the box, the power input shaft is located directly above the power output shaft, and the power input shaft is connected to the engine; the double gear shaft is horizontally arranged between the power input shaft and the power output shaft, and the center line of the double gear shaft is between the power output shaft and the power output shaft. One side of the line connecting the center of the input shaft; the power input shaft is respectively covered with worm sleeves, spline sleeves and gear teeth from left to right, and the worm sleeve is linked with the steering differential; the gear set includes gear gear set, shift gear group, reversing gear set, transition gear and transmission gear set. The gearbox of the utility model effectively reduces the volume of the gearbox.

Description

A gearbox for small agricultural machinery

technical field

The utility model relates to an agricultural implement, in particular to a gearbox applied to a small hand-held agricultural implement. the

Background technique

At present, small hand-held agricultural implements are widely promoted in mountainous and hilly areas due to their small size, light weight, simple and compact structure, and the like. The matching gearbox can be divided into two gears and below two gears and more than two gears in terms of the number of gears. The gearboxes with two gears and below are small in size, but the number of output gears is also small at the same time, which cannot meet different operating conditions; while the gearboxes with more than two gears are larger in size, multiple transition shafts and transition gears are added to achieve multiple gears. The gear is operated, and the handle and shift fork for controlling the gear are added in the gearbox. At the same time, more transition shafts and transition gears are also required to reduce the output speed, which increases the volume of the gearbox. When installing, It takes up a lot of space, which is not conducive to space layout, and is not suitable for small agricultural machines. the

Contents of the invention

What the utility model aims to solve is that the existing two-speed and above gearboxes are large in size, which is not conducive to installation and arrangement, and is not suitable for small agricultural implements. The two-speed and below-two gearboxes cannot meet different operating conditions. Small multi-range gearbox. the

The utility model relates to a gearbox for small agricultural machinery, which is connected with the engine and includes a front box body, a rear box body and a steering differential. The driving wheel is installed and linked with the gearbox, which is characterized in that a power input shaft, a power output shaft, a double gear shaft and a gear set are arranged in the gearbox, and the power input shaft and the power output shaft are horizontally arranged in the middle position inside the gearbox , the power input shaft is located directly above the power output shaft, and the power input shaft is connected to the engine; the double gear shaft is horizontally arranged between the power input shaft and the power output shaft, and the center line of the double gear shaft is connected at the center of the power output shaft and the power input shaft One side of the line; the power input shaft is respectively covered with a worm sleeve, a spline sleeve and gear teeth from left to right, and the worm sleeve is linked with the steering differential; the gear set includes a gear gear set, a shift gear set, and a reversing gear set. The gear set, the transition gear and the transmission gear set, the gear gear set is installed on the power input shaft and the power output shaft, providing three gear selections; the shift gear set is installed between the gear gear sets; the reversing gear set is installed On the worm sleeve and the spline sleeve, adjust the forward or reverse running of the agricultural machine; the transition gear set and the transmission gear set are installed on the power input shaft, power output shaft and double gear shaft for power transmission. the

The gear set is composed of I gear, II gear and III gear, the I gear is installed on the spline sleeve, the III gear is installed on the power input shaft, and the right end of the I gear is provided with cogs , the left end face of the III gear is provided with teeth cogs, the II gear is installed on the power output shaft, and the II gear is located in the middle of the I gear and the III gear. the

The shifting gear set is composed of a shifting gear and a shifting fork. The shifting gear is installed on the spline sleeve between the I gear and the III gear. The gear shifts through the spline teeth and the spline sleeve Connect and slide along the spline sleeve, the left and right end surfaces of the shift gear are provided with cogs, and the shift fork is fixed on the shift gear. the

The reversing gear set is composed of a reversing gear, a reversing shift fork and a forward rotation gear. The left end face of the reversing gear and the right end face of the forward rotation gear are provided with cogs; the reversing gear is installed on the worm sleeve, along the The sleeve slides and drives the worm sleeve to rotate; the reversing fork is fixed on the reversing gear; the positive rotation gear is installed on the spline sleeve and is linked with the spline sleeve through the spline teeth. the

The transition gear set includes a transition gear and a double gear, the transition gear is installed on the left end of the power input shaft, and meshes with the positive rotation gear; the double gear is installed on the double gear shaft, rotates around the double gear shaft, and the transition The gears and the reversing gear that slides to the left mesh separately. the

The transmission gear set is fixed on the power output shaft, and is composed of the main transmission gear, the I transmission gear and the III transmission gear, the main transmission gear meshes with the gear teeth on the right end of the power input shaft, the I transmission gear, the III transmission The gears mesh with the I gear and the III gear respectively. the

The right end of the power output shaft extends out of the gearbox body, and spline teeth are arranged on the wall to facilitate connection with other transmission devices. the

The engine drives the power input shaft to rotate, and the power input shaft drives the power output shaft to rotate through the meshing teeth and the main transmission gear; the I gear, II gear and III gear on the power input shaft follow the power input shaft to rotate, At the same time, it drives the I gear and the III gear to rotate; the shift fork drives the shift gear to slide between the I gear and the III gear, and the shift gear is respectively connected with the three gears to follow the gears to rotate, and The forward rotation gear is driven to rotate through the spline sleeve; the forward rotation gear is driven to rotate through the transition gear; the reversing gear slides on the worm gear sleeve under the action of the reversing fork, and when the steering gear slides to the left, the reversing gear and The duplex gear meshes, and when sliding to the right end, the reversing gear and the positive rotation gear engage through the cogs. the

The utility model is a gearbox for small agricultural machinery, which is scientifically designed and easy to use. Gears with three gears are installed in the gearbox body to provide multi-gear output, and the power input and output shafts are also installed on the In the gearbox body, the power transmission and conversion are carried out through the gear set, which effectively reduces the size of the gearbox and realizes multi-gear conversion. The overall structure of the gearbox is compact, easy to place and install, and is more suitable for small agricultural machines. the

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the utility model. the

Fig. 2 is a schematic diagram of the structure of the A-A surface of the utility model. the

Among them, front box 1, rear box 2, steering differential 3, power input shaft 4, power output shaft 5, dual gear shaft 6, gear teeth 7, worm sleeve 8, spline sleeve 9, gear I 10, II gear 11, III gear 12, shift gear 13, shift fork 14, reversing gear 15, reversing fork 16, positive rotation gear 17, transition gear 18, duplex gear 19, Main drive gear 20, I block transmission gear 21, III block transmission gear 22, spline teeth 23. the

Detailed ways

Embodiment 1: A gearbox for small-scale agricultural machinery, connected with the engine, including a front case 1, a rear case 2 and a steering differential 3, the front case 1 and the rear case 2 are fastened and connected by bolts, and the steering The drive wheels are installed on both sides of the differential 3 and are linked with the gearbox. The power input shaft 4, the power output shaft 5, the dual gear 19 shaft 6 and the gear set are arranged in the gearbox, and the power input shaft 4 and the power output shaft 5 are arranged horizontally. In the middle position inside the gearbox, the power input shaft 4 is located directly above the power output shaft 5, and the power input shaft 4 is connected to the engine; the double gear 19 shaft 6 is horizontally arranged between the power input shaft 4 and the power output shaft 5, and the double gear The center line of the gear 19 shaft 6 is on the side of the center line between the power output shaft 5 and the power input shaft 4; the power input shaft 4 is respectively covered with a worm sleeve 8, a spline sleeve 9, gear teeth 7, and a worm sleeve 8 from left to right. Linked with the steering differential 3; the gear set includes a gear set, 13 sets of shift gears, 15 sets of reversing gears, a transition gear 18 and a transmission gear set; the gear set consists of I gear 10, II gear 11 It is composed of the third block gear 12, the first block gear 10 is installed on the spline sleeve 9, the third block gear 12 is installed on the power input shaft 4, the right end face of the first block gear 10 is provided with tooth cogs, and the left end face of the third block gear 12 is provided with teeth Cog, II gear 11 is installed on the power output shaft 5, II gear 11 is located in the middle of I gear 10 and III gear 12; shift gear 13 groups are composed of shift gear 13 and shift fork 14, The shift gear 13 is installed on the spline sleeve 9 between the I gear 10 and the III gear 12. The shift gear 13 is connected with the spline sleeve 9 through the spline teeth 23 and slides along the spline sleeve 9. The shift gear The left and right end faces of 13 are provided with cogs, and the shift fork 14 is fixed on the shift gear 13; the set of reversing gears 15 is composed of reversing gear 15, reversing fork 16 and positive rotation gear 17, and the reversing gear 15 The left end face and the right end face of the positive rotation gear 17 are provided with cogs; the reversing gear 15 is installed on the worm sleeve 8, slides along the worm sleeve 8 and drives the worm sleeve 8 to rotate; the reversing fork 16 is fixed on the reversing gear 15 Above; the positive rotation gear 17 is installed on the spline sleeve 9 and linked with the spline sleeve 9 through the spline teeth 23; the transition gear 18 group includes the transition gear 18 and the double gear 19, and the transition gear 18 is installed on the left end of the power input shaft 4 , and meshes with the positive rotation gear 17; the double gear 19 is installed on the shaft 6 of the double gear 19, rotates around the shaft 6 of the double gear 19, and meshes with the transition gear 18 and the reversing gear 15 sliding to the left; the transmission The gear set is fixed on the power output shaft 5 and is composed of the main transmission gear 20, the I gear transmission gear 21 and the III gear transmission gear 22. The main transmission gear 20 meshes with the gear teeth 7 on the right end of the power input shaft 4, and the I gear transmission gear 21 , III gear transmission gear 22 meshes with I gear 10 and III gear 12 respectively. The right end of the power take-off shaft 5 stretches out of the gearbox body, and spline teeth 23 are also arranged on its wall for connecting with other power devices. the

After the engine is started, it drives the power input shaft 4 to rotate forward, and the power input shaft 4 drives the main transmission gear 20 to reverse through the gear teeth 7. The main transmission gear 20 simultaneously drives the power output shaft 5 and the I gear transmission gear 21 and II gear on it. 11 and III transmission gear 22 are reversed; the I transmission gear 21 and the III transmission gear 22 respectively drive the I transmission gear 10 and the III transmission gear 12 forward rotation; the shift gear 13 is under the action of the shift fork 14 Sliding between the I gear 10 and the III gear 12, the shift gear 13 follows the I gear 10 or the III gear 12 to rotate forward through the teeth, or meshes with the II gear 11 to produce a forward rotation; the shift gear 13 At the same time, the spline sleeve 9 drives the forward rotation gear 17 to rotate forward; at this time, the transition gear 18 meshed with the forward gear 17 starts to reverse, and simultaneously drives the double gear 19 to rotate forward; the reversing fork 16 Drive the reversing gear 15 to slide on the worm gear sleeve. When the reversing gear 15 slides to the left, it meshes with the dual gear 19 and reverses. The reversing force is transmitted to the steering differential 3 through the worm gear sleeve, and through the steering differential 3 drive the agricultural machine forward, and when the reversing gear 15 slides to the right end, the reversing gear 15 engages with the forward rotation gear 17 through the cogs, and rotates forward with the forward rotation gear 17, driving the agricultural machine backwards. the

Claims (7)

1. a small-scale agricultural machinery is used gearbox; Be connected with motor; Comprise preceding casing (1), rear box (2) and steering differential (3), preceding casing (1) adopts bolton to be connected with rear box (2), and steering differential (3) both sides installing drive is taken turns and linked with gearbox; It is characterized in that being provided with in the described gearbox power input shaft (4), pto (5), duplicate gear (19) axle (6) and gear train; Power input shaft (4) is horizontally set on gearbox bosom position with pto (5), and power input shaft (4) is positioned at directly over the pto (5), and power input shaft (4) is connected with motor; Duplicate gear (19) axle (6) is horizontally set between power input shaft (4), the pto (5), and duplicate gear (19) axle (6) center line is in the side of pto (5) with power input shaft (4) line of centres; Be with worm set (8), spline housing (9) and the gear teeth (7) on the power input shaft (4) from left to right respectively, worm set (8) and steering differential (3) interlock; Gear train comprises shift gear group, power shift gear (13) group, tumbler gear (15) group, transition gear (18) and driving gear set, and the shift gear group is installed on power input shaft (4) and the pto (5), provides three gears to select; Power shift gear (13) group is installed between the shift gear group; Tumbler gear (15) group is installed on worm set (8) and the spline housing (9), and adjustment agricultural machinery goes forward or backwards; Transition gear (18) group is installed on power input shaft (4), pto (5) and duplicate gear (19) axle (6) with driving gear set, is used for transferring power.

2. a kind of small-scale agricultural machinery as claimed in claim 1 is used gearbox; It is characterized in that described shift gear group keeps off gear (10), II retaining gear (11) by I and keep off gear (12) with III and form; I retaining gear (10) is installed on the spline housing (9); III retaining gear (12) is installed on the power input shaft (4), and I retaining gear (10) right side is provided with the tooth inserted tooth, and III retaining gear (12) left side is provided with the tooth inserted tooth; II retaining gear (11) is installed on the pto (5), and II retaining gear (11) is positioned in the middle of I retaining gear (10) and the III retaining gear (12).

3. a kind of small-scale agricultural machinery as claimed in claim 1 is used gearbox; Its characteristic is made up of power shift gear (13) and selector fork spare (14) in described power shift gear (13) group; Power shift gear (13) is installed on the spline housing (9) between I retaining gear (10) and the III retaining gear (12); Power shift gear (13) is connected with spline housing (9) through spline tooth (23) and slides along spline housing (9); Power shift gear (13) left and right sides end face all is provided with the tooth inserted tooth, and selector fork spare (14) is fixed on the power shift gear (13).

4. a kind of small-scale agricultural machinery as claimed in claim 1 is used gearbox; By tumbler gear (15), switching-over shift fork spare (16) with just changeing gear (17) and forming, tumbler gear (15) left side reaches is just changeing gear (17) right side the tooth inserted tooth all is being set its characteristic in described tumbler gear (15) group; Tumbler gear (15) is installed on the worm set (8), slides and drives worm set (8) along worm set (8) and rotate; Switching-over shift fork spare (16) is fixed on the tumbler gear (15); Just changeing that gear (17) is installed in that spline housing (9) is gone up and through spline tooth (23) and spline housing (9) interlock.

5. a kind of small-scale agricultural machinery as claimed in claim 1 is used gearbox; Its characteristic comprises transition gear (18) and duplicate gear (19) in described transition gear (18) group; Transition gear (18) is installed in power input shaft (4) left end, and with just change gear (17) engagement; Duplicate gear (19) is installed on duplicate gear (19) axle (6), rotates around duplicate gear (19) axle (6), meshes respectively with transition gear (18) and the tumbler gear (15) that slides into the left side.

6. a kind of small-scale agricultural machinery as claimed in claim 1 is used gearbox; Its characteristic is fixed on the pto (5) in described driving gear set; Form by main drive gear (20), I retaining driving gear (21) and III retaining driving gear (22); Main drive gear (20) meshes with the gear teeth (7) of power input shaft (4) right-hand member, and I retaining driving gear (21), III retaining driving gear (22) mesh with I retaining gear (10), III retaining gear (12) respectively.

7. a kind of small-scale agricultural machinery as claimed in claim 1 is used gearbox, and its characteristic is stretched out outside the gearbox casing at described pto (5) right-hand member, and spline tooth (23) is set on the wall, conveniently is connected with other transmission devices.

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