Front axle of tractor

Abstract

The utility model relates to the technical field of tractors, in particular to a tractor front axle. Comprising a gearbox with a built-in gear set, a steering machine is installed on the rear side of the gearbox, output shafts are rotationally installed on the left side and the right side of the gearbox, the output shafts are in transmission connection with rotating shafts fixedly connected with hubs through cardan shafts, and connecting sleeves are rotationally installed on the rotating shafts; lower supporting arms are hinged to the bottoms of the left side and the right side of the gearbox, transverse shafts of lower cross shafts are rotationally installed at the ends, away from the gearbox, of the lower supporting arms, lower connecting rods are rotationally installed on vertical shafts of the lower cross shafts, and the ends, away from the lower cross shafts, of the lower connecting rods are fixedly connected with connecting sleeves. The lower supporting arm is further provided with a damping assembly used for damping. Through the structure, the cab of the tractor is in a horizontal state as much as possible, so that the damping effect is enhanced, and the driving experience of a driver is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tractor technology field, concretely relates to a tractor front axle. BACKGROUND

[0002] The front axle is generally arranged at the front end of the vehicle and is connected with the steering system through the steering knuckle, so it is also called the steering axle. It can transmit the steering force from the steering gear to the wheels to realize the steering of the vehicle. It not only supports the spring mass at the front of the vehicle and bears the vertical load, but also bears various longitudinal forces, lateral forces and related torques.

[0003] In the prior art, the tractor front axle mainly comprises a gear box with a built-in differential, two half axle gears of the differential in the gear box are directly connected with the tractor hub through an output shaft, the output shaft can control the rotation of the hub, and a steering machine for controlling the steering of the hub is also installed on the gear box. In the front axle system, the damping system of the tractor is installed in the middle of the front axle. Since the output shaft is directly connected with the hub for transmission, when one side of the hub floats up and down due to the ups and downs of the road, the output shafts on the left and right sides will tilt, thereby causing poor damping effect of the front axle system of the tractor. SUMMARY

[0004] In view of the above problems, the utility model provides a tractor front axle to solve the problem of poor damping effect of the front axle system of the tractor due to the direct transmission connection of the output shaft with the hub in the prior art.

[0005] The utility model discloses a tractor front axle, including the gear box of built-in gear set, the rear side of gear box is installed for controlling the steering machine of hub steering, the left and right sides of gear box rotatably install the output shaft that is driven to rotate by gear set, the end that output shaft is away from gear box is connected with the rotating shaft that is fixedly connected with hub through universal shaft transmission, the connecting sleeve is rotatably installed on the rotating shaft, the bottom of the left and right sides of gear box is all hinged with the lower support arm, the end that lower support arm is away from gear box rotatably installs the horizontal shaft of lower cross shaft, the lower connecting rod is rotatably installed on the vertical shaft of lower cross shaft, and the end that lower connecting rod is away from lower cross shaft is fixedly connected with connecting sleeve, and the damping assembly for damping is also installed on lower support arm.

[0006] Through the above structure, when one side of the hub bounces due to the ups and downs of the road or the obstacles, only the hub on the side will rise and fall due to the existence of the universal shaft, and the hub on the other side will not be affected. Through the cooperation of the damping assembly, the cab of the tractor is kept as horizontal as possible, thereby enhancing the damping effect and improving the driving experience of the driver.

[0007] Preferably, the top of the gear box on the left and right sides is hinged with an upper support arm, the far side of the upper support arm away from the gear box is rotatably installed with the horizontal shaft of an upper cross shaft, the connecting sleeve is fixedly installed with an upper connecting rod, and the end of the upper connecting rod away from the connecting sleeve is rotatably connected with the vertical shaft of the upper cross shaft. Through the setting of the upper support arm, the support structure of the front axle in the device is more stable, and through the setting of the upper cross shaft or the lower cross shaft, the device will not affect the up-down floating of the hub and will not affect the steering of the hub.

[0008] Preferably, the upper support arm and the lower support arm are both in the shape of "Y", the upper support arm and the lower support arm both have three connection points, the two connection points at the open end are both hinged with the side wall of the gear box, the other end is rotatably connected with the corresponding upper cross shaft and lower cross shaft, and the middle part of the upper support arm and the lower support arm is further provided with a reinforcing rod for increasing the structural strength. Through the structural setting of the Y-shaped support arm, the structure of the device is more stable.

[0009] Preferably, the shock absorption assembly comprises a shock absorption spring hinged on the lower support arm, and the top end of the shock absorption spring is hinged with the gear box. Through the setting of the direct connection between the shock absorption spring and the gear box, the structure of the device is more compact.

[0010] Preferably, two groups of shock absorption springs are arranged on one of the lower support arms, and the two groups of shock absorption springs are arranged on the front and rear sides of the reinforcing rod of the lower support arm. Through the setting of the two groups of shock absorption springs, the shock absorption effect of the device is further enhanced, thereby improving the driving experience of the driver.

[0011] Preferably, the output end of the steering machine is provided with a first ball socket, a first ball head matched with the first ball socket is installed in the first ball socket, a straight connecting rod is fixedly installed on the first ball head, a second ball socket matched with the straight connecting rod is fixedly installed on the end of the straight connecting rod away from the first ball head, a second ball head matched with the second ball socket is installed in the second ball socket, a steering rod is fixedly installed on the second ball head, and the end of the steering rod away from the second ball head is fixedly connected with the connecting sleeve. Through the cooperation of the ball head and the ball socket of the steering machine system, the steering of the hub in the device is more convenient to control.

[0012] Preferably, the universal shaft comprises a second universal joint fixedly connected with the output shaft, a connecting shaft is fixedly installed on the end of the second universal joint away from the output shaft, a first universal joint is fixedly installed on the end of the connecting shaft away from the second universal joint, and a rotating shaft is fixedly connected with the end of the first universal joint away from the connecting shaft. Through the cooperation of the connecting shaft and the universal joint, when the hub shakes up and down in the presence of obstacles or road undulations, the output shaft can remain horizontal, that is, the gear box in the device can be directly fixed on the tractor frame, thereby improving the shock absorption effect of the device and increasing the driving experience of the driver.

[0013] Preferably, the gear box is rotatably installed with a driving gear rotatable by the input shaft, the driving gear is engaged with a driven gear, the driven gear is fixedly connected with a gear carrier, the gear carrier is symmetrically installed with two planet gears which can revolve around the gear carrier and can also rotate, the two planet gears are engaged with two half axle gears, the two half axle gears are respectively fixedly connected with the left and right output shafts, and the output shafts are rotatably connected with the gear carrier. A complete differential gear set is formed through the driving gear, the driven gear, the planet gears and the half axle gears, so that the device can be more stable during steering.

[0014] In conclusion, the device connects the output shaft and the wheel hub through the universal shaft, compared with the traditional straight rod type connection method of the tractor, the gear box in the device can be directly fixedly connected with the rack of the tractor, when the single-sided wheel hub faces obstacles or undulating road surface, the single-sided wheel hub floats up and down under the action of the universal shaft and the damping spring, and the other wheel hub is not affected. That is, when the device encounters single-sided road surface undulation on the flat road, the cab is always kept horizontal and does not tilt, and the damping spring is further used to reduce the up and down floating of the cab, so that the damping effect of the device is better, and the driving experience of the driver is better. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the first perspective of the tractor front axle of the utility model;

[0016] Figure 2 It is a whole structure schematic view of the second perspective of the utility model;

[0017] Figure 3 It is Figure 1 It is a local enlarged view of the area A;

[0018] Figure 4 It is a schematic view of the internal structure of the gear box.

[0019] In the figure: 1-supporting seat; 2-gear box; 3-upper supporting arm; 4-upper connecting rod; 5-wheel hub; 6-lower connecting rod; 7-lower supporting arm; 8-universal shaft; 9-damping spring; 10-rotating shaft; 11-connecting sleeve; 12-steering rod; 13-straight connecting rod; 14-steering machine; 15-input shaft; 16-upper cross shaft; 17-lower cross shaft; 18-driving gear; 19-driven gear; 20-gear carrier; 21-half axle gear; 22-planet gear; 23-output shaft; 24-connecting shaft; 25-first universal joint; 26-second universal joint. DETAILED DESCRIPTION

[0020] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0021] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] The following is a description of the preferred embodiments of the present application in conjunction with the accompanying drawings.

[0023] As shown in Figure 1 , Figure 2 , Figure 4 The utility model provides a tractor front axle, including built -in reducer gear set's gear box 2, gear box 2's rear side is installed with the support seat 1 of tractor frame fixed connection, the gear box 2 in the device can also be directly fixed together with tractor frame. Support seat 1 is rotatably installed with the input shaft 15 that can be driven to rotate by tractor drive mechanism, and the input shaft 15 transmits power to the output shaft 23 on the left and right sides of the gear box 2 through the gear box 2, and the output shaft 23 is rotatably connected with the rotating shaft 10 fixedly connected with the wheel hub 5 through the universal shaft 8 at the end away from the gear box 2.

[0024] As shown in Figure 1 , Figure 2 , Figure 3 It is rotatably installed with the connecting sleeve 11 on the rotating shaft 10, and the gear box 2 is hingedly connected with the lower support arm 7 and the upper support arm 3 on the left and right sides, and the universal shaft 8 is located between the lower support arm 7 and the upper support arm 3, and the lower support arm 7 is located at the bottom of the gear box 2, and the upper support arm 3 is located at the top of the gear box 2. The horizontal shaft of the lower cross shaft 17 is rotatably installed at the end away from the gear box 2 of the lower support arm 7, the vertical shaft of the lower cross shaft 17 is rotatably installed with the lower connecting rod 6, and the end away from the lower cross shaft 17 of the lower connecting rod 6 is fixedly connected with the connecting sleeve 11. The horizontal shaft of the upper cross shaft 16 is rotatably installed at the side away from the gear box 2 of the upper support arm 3, the upper connecting rod 4 is fixedly installed on the connecting sleeve 11, and the end away from the connecting sleeve 11 of the upper connecting rod 4 is rotatably connected with the vertical shaft of the upper cross shaft 16. A damping assembly for damping is also installed on the lower support arm 7.

[0025] The universal shaft 8 comprises a second universal joint 26 fixedly connected with the output shaft 23, a connecting shaft 24 fixedly installed at one end of the second universal joint 26 away from the output shaft 23, a first universal joint 25 fixedly installed at one end of the connecting shaft 24 away from the second universal joint 26, and the rotating shaft 10 fixedly connected with one end of the first universal joint 25 away from the connecting shaft 24.

[0026] Wherein, no matter through the setting of the upper cross shaft 16 or the lower cross shaft 17, it is for not affecting the up-down floating and steering of the rotating shaft 10. In the initial state, that is, the positions of the universal shaft 8 on the left and right sides are in the horizontal state, the upper cross shaft 16, the lower cross shaft 17 and the second universal joint 26 on the universal shaft 8 are on the same straight line.

[0027] As a further illustration of the present example, the upper support arm 3 and the lower support arm 7 are both in the shape of “Y”, and each of the upper support arm 3 and the lower support arm 7 has three connecting points, two of which are hingedly connected with the side wall of the gear box 2 at the open end, and the other end is rotatably connected with the corresponding upper cross shaft 16 and lower cross shaft 17. The middle part of the upper support arm 3 and the lower support arm 7 is further provided with a reinforcing rod for increasing the structural strength. This structure makes the connection between the support arm and the gear box 2 and the connection between the support arm and the connecting sleeve 11 more stable.

[0028] The damping assembly in the device can be directly installed between the lower support arm 7 and the tractor frame, or installed between the lower support arm 7 and the gear box 2. If it is installed between the lower support arm 7 and the tractor frame, a hinged seat needs to be installed on the tractor frame in advance during installation, which is a relatively cumbersome process. Therefore, in the device, the damping assembly comprises a damping spring 9 hingedly connected to the lower support arm 7, and the top end of the damping spring 9 is hingedly connected with the gear box 2. In this way, the device and the tractor can be directly assembled without the need to add devices such as hinged seats on the tractor frame.

[0029] In order to further improve the damping effect of the device, two groups of damping springs 9 are provided on one lower support arm 7, and the two groups of damping springs 9 are respectively arranged on the front and rear sides of the reinforcing rod of the lower support arm 7, so that the transmission of the universal shaft 8 is not affected and damping can be achieved.

[0030] As Figure 2As shown, the steering machine 14 is also installed on the bottom of the support seat 1 at the rear side of the gear box 2, which is a commonly used device in the art, and its specific structure is well known to those skilled in the art, and can also be easily known through other patents or popular science videos, which does not belong to the inventive point of the utility model, so it is not described here. The output end of the steering machine 14 is provided with a first ball socket, a first ball head matched with the first ball socket is installed in the first ball socket, a straight connecting rod 13 is fixedly installed on the first ball head, a second ball socket matched with the first ball socket is fixedly installed on the end of the straight connecting rod 13 away from the first ball head, a second ball head matched with the second ball socket is installed in the second ball socket, and a steering rod 12 is fixedly installed on the second ball head. The end of the steering rod 12 away from the second ball head is fixedly connected with the connecting sleeve 11.

[0031] As shown in Figure 1 , Figure 4 As shown, the gear box 2 is rotatably installed with a driving gear 18 driven to rotate by an input shaft 15, and the driving gear 18 is engaged with a driven gear 19, wherein the driving gear 18 and the driven gear 19 are both helical gears and are arranged at a right angle. The driven gear 19 is fixedly connected with a gear carrier 20, and the gear carrier 20 is symmetrically provided with two planetary gears 22 which can revolve with the gear carrier 20 and can also rotate by themselves. The two planetary gears 22 are engaged with two half shaft gears 21, and the two half shaft gears 21 are respectively fixedly connected with the left and right output shafts 23, and the output shafts 23 are rotatably connected with the gear carrier 20. The driving gear 18, the driven gear 19, the planetary gears 22, the half shaft gears 21 and the gear carrier 20 constitute a complete differential mechanism, which can automatically distribute the speed difference between the left and right tires when the tractor turns, thereby realizing the turning of the tractor.

[0032] The use principle of the device is as follows: taking the tractor driving on a horizontal road as an example, when an obstacle appears on the road and the left tire passes over the obstacle, due to the existence of the obstacle, the left tire will be lifted upward, at this time, due to the existence of the universal shaft 8, only the left universal shaft 8, the upper support arm 3 and the lower support arm 7 are inclined upward, and the left shock spring 9 is compressed, and when the tire passes over the obstacle, the left wheel will return to the initial state under the action of the shock spring 9 and its own gravity, and in this process, the right wheel will not change, thereby avoiding the inclination of the cab, so that the shock absorption effect of the device is better, and the driving experience of the driver is improved.

[0033] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, without departing from the technical principles of the utility model, a number of improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection range of the utility model.

Claims

1. A tractor front axle, comprising a gear box (2) with built-in gear set, a steering engine (14) is installed at the rear side of the gear box (2) for controlling the steering of the wheel hub (5), and output shafts (23) driven by the gear set to rotate are installed at the left and right sides of the gear box (2) to rotate, characterized in that, The output shaft (23) is connected with the hub (5) through the universal shaft (8) at one end away from the gear box (2), the connecting sleeve (11) is rotatably installed on the rotating shaft (10), the lower support arm (7) is hingedly connected to the bottom of the gear box (2), the horizontal shaft of the lower cross shaft (17) is rotatably installed at one end of the lower support arm (7) away from the gear box (2), the lower connecting rod (6) is rotatably installed on the vertical shaft of the lower cross shaft (17), and the lower connecting rod (6) is fixedly connected with the connecting sleeve (11) at one end away from the lower cross shaft (17).

2. The tractor front axle of claim 1, wherein, The upper support arm (3) is hingedly connected to the top of the gear box (2), the horizontal shaft of the upper cross shaft (16) is rotatably installed at one side of the upper support arm (3) away from the gear box (2), the upper connecting rod (4) is fixedly installed on the connecting sleeve (11), and one end of the upper connecting rod (4) away from the connecting sleeve (11) is rotatably connected with the vertical shaft of the upper cross shaft (16).

3. The tractor front axle of claim 2, wherein, The upper support arm (3) and the lower support arm (7) are both "Y" shaped, each of the upper support arm (3) and the lower support arm (7) has three connecting points, the two connecting points at the opening end are hingedly connected with the side wall of the gear box (2), the other end is rotatably connected with the corresponding upper cross shaft (16) and lower cross shaft (17), and the middle part of the upper support arm (3) and the lower support arm (7) is provided with a reinforcing rod for increasing structural strength.

4. The tractor front axle of claim 3, wherein, The damping assembly comprises a damping spring (9) hingedly connected to the lower support arm (7), and the top end of the damping spring (9) is hingedly connected with the gear box (2).

5. The tractor front axle of claim 4, wherein, Two groups of damping springs (9) are arranged on one of the lower support arms (7), and the two groups of damping springs (9) are arranged on the front and rear sides of the reinforcing rod of the lower support arm (7).

6. The tractor front axle of claim 1, wherein, The output end of the steering machine (14) is provided with a first ball socket, a first ball head matched with the first ball socket is installed in the first ball socket, a straight connecting rod (13) is fixedly installed on the first ball head, a second ball socket matched with the straight connecting rod (13) is fixedly installed at one end of the straight connecting rod (13) away from the first ball head, a second ball head matched with the second ball socket is installed in the second ball socket, a steering rod (12) is fixedly installed on the second ball head, and one end of the steering rod (12) away from the second ball head is fixedly connected with the connecting sleeve (11).

7. The tractor front axle of claim 1, wherein, The universal shaft (8) comprises a second universal joint (26) fixedly connected with the output shaft (23), a connecting shaft (24) fixedly installed at one end of the second universal joint (26) away from the output shaft (23), and a first universal joint (25) fixedly installed at one end of the connecting shaft (24) away from the second universal joint (26), and the rotating shaft (10) is fixedly connected with one end of the first universal joint (25) away from the connecting shaft (24).

8. The tractor front axle of claim 1, wherein, The gear box (2) is internally rotatably installed with a driving gear (18) which can be driven to rotate by an input shaft (15), the driving gear (18) is engaged with a driven gear (19), the driven gear (19) is fixedly connected with a gear frame (20), the gear frame (20) is symmetrically and rotatably installed with two planetary gears (22) which can revolve with the gear frame (20) and can also rotate by themselves, the two planetary gears (22) are engaged with two half axle gears (21), the two half axle gears (21) are respectively fixedly connected with left and right output shafts (23), and the output shafts (23) are rotatably connected with the gear frame (20).

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