Ratchet wheel type automobile differential lock

Abstract

The utility model relates to the field of automobile transmission devices, in particular to a ratchet wheel type automobile differential mechanism lock which comprises a differential mechanism and a half shaft, a ratchet wheel mechanism is arranged on the half shaft, the differential mechanism is provided with a driving piece used for driving the ratchet wheel mechanism, and a gear shifting fork used for moving the position of the ratchet wheel mechanism is further arranged on the half shaft. The ratchet mechanism is used for switching forward or reverse gears, and a speed reduction assembly is arranged between the ratchet mechanism and the driving piece. The driving piece is arranged on the differential mechanism to drive the ratchet wheel mechanisms on the left half shaft and the right half shaft, when one wheel slips, due to the principle of the differential mechanism, the other wheel half shaft stops rotating, pawls in the ratchet wheel mechanisms drive the ratchet wheels to rotate, then the ratchet wheels drive the half shafts to rotate, and a differential mechanism lock does not need to be frequently opened and closed. Therefore, the problem that the differential lock needs to be continuously opened and closed under different road conditions can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile transmission device, especially a kind of automobile differential lock of ratchet form. BACKGROUND

[0002] Differential lock is a kind of locking mechanism installed on the central differential of automobile, and its working principle is to forcibly synchronize the rotation speed of two wheel shafts, so that the two half shafts reach the same rotation speed as far as possible, and its main function is to lock the differential case and half shaft as a whole when one driving wheel of automobile slips, so that the differential loses differential action, and the torque can be transferred to the other driving wheel, so that even if one wheel slips, power can be transmitted to the wheel on the non-slip side through differential lock, so that the automobile can get out of trouble and continue to drive.

[0003] However, it should be noted that differential lock should be opened and used under severe road conditions or extreme conditions, because the differential action of differential should be exerted when automobile is driving normally, i.e. allowing left and right wheels to roll at different speeds, otherwise it will cause serious damage to the tires and half shafts of automobile. Therefore, when the vehicle is off-road, the differential lock needs to be turned on and off constantly, or the high friction type and viscous shaft coupling type differential lock is operated frequently, which is relatively complicated, so a ratchet type automobile differential lock is needed to solve the problem of constantly turning on and off differential lock under different road conditions. UTILITY MODEL CONTENTS

[0004] The purpose of the present application is to solve the problem of constantly turning on and off differential lock under different road conditions, by providing a ratchet type automobile differential lock, which drives the ratchet mechanism on the left and right two half shafts by setting driving member on the differential, and when one wheel slips, the other wheel half shaft will stop rotating due to the principle of differential, at this time, the pawl in the ratchet mechanism drives the ratchet to rotate, and the ratchet drives the half shaft to rotate, and the problem of constantly turning on and off differential lock under different road conditions can be solved without frequently turning on and off differential lock.

[0005] In order to achieve the above purpose, the utility model adopts the technical scheme of a ratchet type automobile differential lock, which comprises a differential and a half shaft, the half shaft is provided with a ratchet mechanism, the differential is provided with a driving member for driving the ratchet mechanism, the half shaft is further provided with a shift fork for moving the position of the ratchet mechanism, for switching forward or reverse gear position, and a reduction assembly is arranged between the ratchet mechanism and the driving member.

[0006] The utility model discloses a drive member is set up on differential to drive the ratchet mechanism on the left and right two half shafts, when one wheel slips, because of the principle of differential, so the other wheel half shaft will stop rotating, at this time, the ratchet pawl in ratchet mechanism drives the ratchet wheel to rotate, and the ratchet wheel drives the half shaft to rotate again, and it does not need to open and close differential lock frequently, can solve the problem of needing to open and close differential lock back and forth under different road conditions.

[0007] Further, the ratchet mechanism comprises a forward gear and a reverse gear, a plurality of forward pawls are arranged in the forward gear, a forward ratchet wheel is arranged on the half shaft corresponding to the forward pawls, a plurality of reverse pawls are arranged in the reverse gear, a reverse ratchet wheel is arranged on the half shaft corresponding to the reverse pawls, and the arrangement direction of the reverse pawls is opposite to that of the forward pawls; the speed reduction assembly comprises a gear shaft, a driven gear and a driving gear are arranged on the gear shaft, the driven gear is engaged with the driving gear, and the driving gear is selectively engaged with the forward gear or the reverse gear.

[0008] The utility model discloses a working principle is: first we change the speed reduction ratio of speed reduction assembly, with letter n representing the speed, for example, we set the highest speed difference of left and right wheels as 3 times, when differential locking, that is, when the car is forward driving, the transmission shaft of the car drives differential to rotate, when the speed of one side half shaft is less than that of the forward gear on the half shaft, differential locking, that is, the forward pawl clamps the forward ratchet wheel and rotates it;

[0009] When the car is normally straight driving, the operator hangs the forward gear, the linkage shift fork makes the driven gear engage with the forward gear, the speed of the side bevel gear of differential is equal to that of the two half shafts, differential drives the driving member to rotate, the driving member drives the driven gear of the speed reduction assembly to rotate, the driven gear drives the gear shaft to rotate, the gear shaft drives the driving gear to rotate, the driving gear drives the forward gear to rotate, and the speed of the forward gear will be less than that of the half shaft due to the speed reduction of the speed reduction assembly, at this time, the forward ratchet wheel on the half shaft rapidly passes through the forward pawl, and the ratchet differential lock does not work, so that the car can normally drive;

[0010] When the car is normally turning, the speed of the side bevel gear of differential will be greater than that of one side wheel half shaft and less than that of the other side wheel half shaft due to the principle of differential, and the speed difference of the left and right wheel half shafts will not be greater than 3 times when the car is turning, at this time, the half shaft with slower speed drives the corresponding forward ratchet wheel to rotate, the speed of the forward ratchet wheel is still greater than that of the forward gear, the forward ratchet wheel rapidly passes through the forward pawl, the half shaft with faster speed drives the corresponding forward ratchet wheel to rotate, and the forward ratchet wheel also rapidly passes through the forward pawl, so that the ratchet differential lock does not work, and the car can normally turn;

[0011] When one side of the automobile wheel slips, the half shaft speed of the slipping side will rise rapidly due to the differential principle, and the half shaft speed of the other side will decrease or stop rapidly. At this time, the driving member is rotated by the side bevel gear of the differential, the driven gear is rotated by the driving gear, the gear shaft is rotated by the driven gear, the driving gear is rotated by the gear shaft, and the driving gear still rotates the forward pawl around the half shaft. When the speed difference between the two half shafts is greater than 3 times, the half shaft speed of the non-slip side will be lower than the forward gear speed, the forward pawl will be clamped into the forward ratchet wheel, and the forward ratchet wheel will be rotated forcibly. The forward ratchet wheel rotates the half shaft again, plays the role of differential lock, and makes the wheel on the non-slip side also have power output.

[0012] When the automobile is reversing normally, the operator hangs the reverse gear, the linkage shift fork makes the driving gear engage with the reverse gear, the speed of the side bevel gear of the differential is equal to the speed of the half shaft, the differential drives the driving member to rotate, the driving member drives the driven gear of the speed reduction assembly to rotate, the gear shaft is rotated by the driven gear, the driving gear is rotated by the gear shaft, the driving gear drives the reverse gear to rotate, and the speed of the reverse gear will be less than the speed of the half shaft due to the speed reduction assembly. At this time, the reverse ratchet wheel quickly passes through the reverse pawl, the ratchet differential lock does not play a role, and the automobile travels normally.

[0013] When the automobile is reversing and turning, the speed of the side bevel gear of the differential will be greater than the speed of one side of the half shaft and less than the speed of the other side of the half shaft due to the differential principle. When the automobile turns, the speed difference between the left and right half shafts will not be greater than 3 times. At this time, the half shaft with a slower speed drives the corresponding reverse ratchet wheel to rotate, the speed of the reverse ratchet wheel is still greater than the speed of the reverse gear, the reverse ratchet wheel quickly passes through the reverse pawl, the half shaft with a faster speed drives the corresponding reverse ratchet wheel to rotate, the reverse ratchet wheel also quickly passes through the reverse pawl, the ratchet differential lock does not play a role, and the automobile reverses normally and turns.

[0014] When the automobile is reversing and one side of the wheel slips, the speed of the half shaft on the slipping side will rise rapidly due to the differential principle, and the speed of the half shaft on the other side will decrease or stop rapidly. At this time, the driving gear is rotated by the side bevel gear of the differential, the driven gear is rotated by the driving gear, the gear shaft is rotated by the driven gear, the driving gear is rotated by the gear shaft, and the driving gear still rotates the reverse pawl around the half shaft. When the speed difference between the two half shafts is greater than 3 times, the half shaft speed of the non-slip side will be lower than the reverse gear speed, the reverse pawl will be clamped into the reverse ratchet wheel, and the reverse ratchet wheel will be rotated forcibly. The reverse ratchet wheel rotates the half shaft again, plays the role of differential lock, and makes the wheel on the non-slip side also have power output.

[0015] As a preferred scheme of the utility model, the driving gear is a driving gear wheel, the driving gear wheel rotation speed is equal to the side bevel gear rotation speed of differential, the gear ratio of the driving gear and passive gear is less than the gear ratio of driving gear and forward gear, and also less than the gear ratio of driving gear and reverse gear.

[0016] As a preferred scheme of the utility model, the driving gear is a driving gear wheel, the driving gear wheel rotation speed is equal to the side bevel gear rotation speed of differential, the gear ratio of the driving gear and passive gear is less than the gear ratio of driving gear and forward gear, and also less than the gear ratio of driving gear and reverse gear.

[0017] As a preferred scheme of the utility model, the driving gear, forward gear, reverse gear, forward ratchet wheel and reverse ratchet wheel are all designed with half shaft as the axis, so that the differential lock structure is compact and stable, and space can be saved, and the cooperation efficiency between gears is high.

[0018] As a preferred scheme of the utility model, the driving gear, forward gear and reverse gear are all rotationally connected with the half shaft, and the forward ratchet wheel and reverse ratchet wheel are all transmissionally connected with the half shaft. Rotationally connecting the driving gear, forward gear and reverse gear enables them to rotate freely on the half shaft, and transmissionally connecting the forward ratchet wheel and reverse ratchet wheel enables them to drive the half shaft to rotate.

[0019] As a preferred scheme of the utility model, the forward gear and forward ratchet pawl are provided with a connecting seat, the reverse gear and reverse ratchet pawl are also provided with a connecting seat, the connecting seat is rotationally connected with the forward ratchet pawl and reverse ratchet pawl, the forward gear and forward ratchet pawl are also provided with a spring, and the reverse gear and reverse ratchet pawl are also provided with a spring. The connecting seat provides necessary support for multiple forward ratchet pawls and reverse ratchet pawls, and the spring rotationally connects the forward ratchet pawl to the forward ratchet wheel or the reverse ratchet pawl to the reverse ratchet wheel, so that the ratchet pawl can clamp the corresponding ratchet wheel and transmit power.

[0020] As a preferred scheme of the utility model, the forward ratchet wheel adapted to the forward ratchet pawl is provided with forward ratchet teeth, the reverse ratchet wheel adapted to the reverse ratchet pawl is provided with reverse ratchet teeth, and the arrangement direction of the forward ratchet teeth is opposite to that of the reverse ratchet teeth. This enables the forward ratchet pawl or reverse ratchet pawl to clamp the corresponding ratchet teeth and drive the corresponding ratchet wheel to move, thereby helping the vehicle to realize the differential lock function of moving forward or reversing.

[0021] In summary, due to the adoption of the above technical scheme, the utility model has the beneficial effects that:

[0022] 1. The utility model discloses a working principle is: first we change the deceleration ratio of deceleration assembly, with the letter n representing the rotating speed, for example, we set the highest rotating speed difference of left and right wheels as 3 times when the differential lock, that is, when the car is forward driving, the transmission shaft of the car drives the differential to rotate, the rotating speed of one side half shaft is less than the rotating speed of the forward gear on the half shaft, and the differential lock is locked, that is, the forward pawl clamps the forward ratchet wheel and rotates with it.

[0023] When the car is normal straight driving, the operator hangs the forward gear, and the linkage gear shift fork makes the driven gear mesh with the forward gear, the rotating speed of the side bevel gear of the differential is equal to the rotating speed of the half shaft, the differential drives the driving gear to rotate, the driving gear drives the driven gear of the deceleration assembly to rotate, the driven gear drives the gear shaft to rotate, the gear shaft drives the driving gear to rotate, the driving gear drives the forward gear to rotate, and the rotating speed of the forward gear will be less than the rotating speed of the half shaft due to the rotating speed of the deceleration assembly, at this time, the forward ratchet wheel on the half shaft rapidly passes through the forward pawl, the ratchet differential lock does not play a role, and the car normally drives.

[0024] When the car is normal turning, due to the differential principle, the rotating speed of the side bevel gear of the differential will be greater than the rotating speed of one side wheel half shaft and less than the rotating speed of the other side wheel half shaft, and the rotating speed difference of the left and right wheel half shafts will not be greater than 3 times when the car turns, at this time, the half shaft with slow rotating speed drives the corresponding forward ratchet wheel to rotate, the rotating speed of the forward ratchet wheel is still greater than the rotating speed of the forward gear, the forward ratchet wheel rapidly passes through the forward pawl, the half shaft with fast rotating speed on the other side drives the corresponding forward ratchet wheel to rotate, and the forward ratchet wheel also rapidly passes through the forward pawl, the ratchet differential lock does not play a role, and the car normally turns.

[0025] When the wheel on one side of the car slips, due to the differential principle, the rotating speed of the half shaft on the slipping side will surge, and the rotating speed of the half shaft on the other side will rapidly decrease or stop, at this time, the side bevel gear of the differential drives the driven gear to rotate, the driven gear drives the gear shaft to rotate, the gear shaft drives the driving gear to rotate, the driving gear still drives the forward pawl to rotate around the half shaft, when the rotating speed difference of the two half shafts is greater than 3 times, the rotating speed of the half shaft on the non-slipping side will be lower than the rotating speed of the forward gear, the forward pawl will be clamped into the forward ratchet wheel, forcibly drives the forward ratchet wheel to rotate, the forward ratchet wheel drives the half shaft to rotate, plays a role of the differential lock, and makes the wheel on the non-slipping side also have power output.

[0026] When the car is normal straight reversing, the operator hangs the reverse gear, and the linkage gear shift fork makes the driving gear mesh with the reverse gear, the rotating speed of the side bevel gear of the differential is equal to the rotating speed of the half shaft, the differential drives the driving gear to rotate, the driving gear drives the driven gear of the deceleration assembly to rotate, the driven gear drives the gear shaft to rotate, the gear shaft drives the driving gear to rotate, the driving gear drives the reverse gear to rotate, and the rotating speed of the reverse gear will be less than the rotating speed of the half shaft due to the rotating speed of the deceleration assembly, at this time, the reverse ratchet wheel rapidly passes through the reverse pawl, the ratchet differential lock does not play a role, and the car normally drives.

[0027] When the car is reversing and turning, the side bevel gear of the differential will rotate faster than the half shaft on one side and slower than the half shaft on the other side due to the principle of differential. When the car is turning, the speed difference between the left and right half shafts will not exceed 3 times. At this time, the half shaft with slower speed drives the corresponding reversing ratchet to rotate, and the reversing ratchet still rotates faster than the reversing gear. The reversing ratchet quickly slides over the reversing pawl, and the half shaft with faster speed drives the corresponding reversing ratchet to rotate, and the reversing ratchet also quickly slides over the reversing pawl. The ratchet differential lock does not work, and the car reverses normally and turns.

[0028] When the car is reversing and one side wheel is slipping, the speed of the half shaft on the slipping side will surge, and the speed of the half shaft on the other side will decrease or stop rapidly. At this time, the side bevel gear of the differential drives the driving gear to rotate, the driving gear drives the driven gear to rotate, the driven gear drives the gear shaft to rotate, the gear shaft drives the driving gear to rotate, and the driving gear still drives the reversing pawl to rotate around the half shaft. When the speed difference between the two half shafts exceeds 3 times, the speed of the half shaft on the non-slip side will be lower than the speed of the reversing gear, the reversing pawl will be stuck in the reversing ratchet, and the reversing ratchet will be forced to rotate. The reversing ratchet drives the half shaft to rotate, which plays the role of differential lock and allows the non-slip side wheel to have power output.

[0029] 2. The side bevel gear of the differential provides rotational power for the driving gear. The gear ratio of the driving gear to the driven gear is smaller than the gear ratio of the driving gear to the forward gear. When the car is driving straight and turning, the speed of the half shaft is greater than the speed of the forward gear, the forward ratchet quickly slides over the forward pawl, and the ratchet differential lock does not work, allowing the car to drive straight and turn normally.

[0030] 3. The number of teeth of the driving gear is smaller than the number of teeth of the driven gear, which makes the reduction assembly play the role of speed reduction and torque increase, so that the driving gear is sufficient to drive the ratchet and the half shaft to rotate.

[0031] 4. The driving gear, the forward gear, the reversing gear, the forward ratchet and the reversing ratchet are designed with the half shaft as the center, which makes the differential lock structure compact and stable, saves space, and improves the coordination efficiency between the gears.

[0032] 5. The driving gear, the forward gear and the reversing gear are connected with the half shaft in rotation, which allows the driving gear, the forward gear and the reversing gear to rotate freely on the half shaft. The forward ratchet and the reversing ratchet are connected with the half shaft in transmission, which allows the forward ratchet and the reversing ratchet to drive the half shaft to rotate, and also allows the half shaft to drive the forward ratchet and the reversing ratchet to rotate.

[0033] 6. The connecting seat provides necessary support for the pawl. The spring presses the pawl lightly onto the ratchet via the pivot. Setting multiple pawls allows the pawl to more firmly grip the ratchet and transmit power.

[0034] 7. The forward ratchet is arranged in the opposite direction to the reverse ratchet, so that the forward or reverse pawl can engage the corresponding ratchet and drive the corresponding ratchet wheel to move, thus helping the car to achieve the differential lock function of forward or reverse. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of this utility model when the car is moving in a straight line, and a diagram showing the rotational speed of each gear;

[0036] Figure 2 This is a schematic diagram of the ratchet assembly and deceleration assembly of the present invention when a car is moving in a straight line, as well as a diagram of the rotational speed of each gear;

[0037] Figure 3 This is a schematic diagram of the structure of this utility model when a car is normally cornering and moving forward, as well as a diagram of the rotational speed of each gear;

[0038] Figure 4 This is a schematic diagram of the ratchet assembly and deceleration assembly of the present invention during normal cornering and forward movement of a car, as well as a diagram of the rotational speed of each gear;

[0039] Figure 5 This is a schematic diagram of the structure of the present invention when a car is moving forward but one wheel is slipping, and a diagram showing the rotational speed of each gear.

[0040] Figure 6 This invention provides a schematic diagram of the ratchet assembly and deceleration assembly, as well as a diagram of the rotational speeds of each gear, when a car is moving forward but one wheel is slipping.

[0041] Figure 7 This is a schematic diagram of the structure of this utility model when a car is driving in a straight line in reverse, and a diagram showing the rotational speed of each gear;

[0042] Figure 8 This invention provides a schematic diagram of the ratchet assembly and deceleration assembly, as well as a diagram of the rotational speeds of each gear, during the straight-line reverse driving of a car.

[0043] Figure 9 This is a schematic diagram of the structure of this utility model when a car is reversing and turning normally, and a diagram showing the rotational speed of each gear;

[0044] Figure 10 This invention provides a schematic diagram of the ratchet assembly and deceleration assembly during normal reversing and cornering of a car, as well as a diagram showing the rotational speeds of each gear.

[0045] Figure 11 This is a schematic diagram of the structure of the present invention when a car slips while reversing, and a diagram showing the rotational speed of each gear;

[0046] Figure 12 The utility model discloses the structure diagram and each gear rotation speed diagram of ratchet wheel assembly and deceleration assembly when the car backs up slips.

[0047] Figure 13 It is the side view of the front gear and the front ratchet wheel.

[0048] Marked in the drawing: 1 - differential, 2 - side bevel gear, 3 - driving gear, 4 - gear shaft, 4.1 - passive gear, 4.2 - driving gear, 5 - shift fork, 6 - forward gear, 6.1 - forward pawl, 7 - reverse gear, 7.1 - reverse pawl, 8 - half shaft, 8.1 - forward ratchet wheel, 8.1.1 - forward ratchet tooth, 8.2 - reverse ratchet wheel, 8.2.1 - reverse ratchet tooth, 9 - transmission shaft, 10 - wheel, 11 - connecting seat, 12 - spring. DETAILED DESCRIPTION

[0049] The utility model will be explained in detail below in combination with the drawings.

[0050] In order to make the utility model's purpose, technical scheme and advantage more clear and obvious, the following is in combination with the drawing and example, and the utility model is further explained in detail.It should be understood that the specific example described here is only used to explain the utility model, and is not used to limit the utility model. Example 1

[0051] As Figures 1-13 Shown, a kind of ratchet wheel form's car differential lock in the embodiment, including differential 1 and half shaft 8, differential 1 is equipped with driving member, for driving the ratchet mechanism on half shaft 8, half shaft 8 is also equipped with shift fork 5 to move the position of ratchet mechanism on half shaft 8, for switching forward or reverse gear position, ratchet mechanism and driving member are equipped with deceleration assembly;Ratchet mechanism includes forward gear 6 and reverse gear 7, forward gear 6 is equipped with multiple forward pawl 6.1, half shaft 8 is adapted to forward pawl 6.1 and is equipped with forward ratchet wheel 8.1, reverse gear 7 is equipped with multiple reverse pawl 7.1, half shaft 8 is adapted to reverse pawl 7.1 and is equipped with reverse ratchet wheel 8.2, the arrangement direction of reverse pawl 7.1 is opposite to the arrangement direction of forward pawl 6.1;Deceleration assembly includes gear shaft 4, gear shaft 4 is equipped with passive gear 4.1 and driving gear 4.2, passive gear 4.1 is engaged with driving gear 3, and driving gear 4.2 is selectively engaged with forward gear 6 or reverse gear 7.

[0052] The utility model discloses a working principle is: first we change the deceleration ratio of deceleration assembly, with letter n representing the rotating speed, for example, we set the highest rotating speed difference of left and right wheels 10 as 3 times when differential mechanism 1 is locked, that is, when the car is forward driving, the transmission shaft 9 of car drives differential mechanism 1 to run, the rotating speed of one side half axle 8 is less than the rotating speed of the forward gear 6 on this half axle 8, differential mechanism 1 is locked, that is, forward pawl 6.1 clamps forward ratchet wheel 8.1 and rotates with it,

[0053] When the car is normally straight driving, the operator hangs the forward gear, and the linkage shift fork 5 makes the driven gear 4.1 mesh with the forward gear 6, the rotating speed of the side bevel gear 2 of differential mechanism 1 is equal to the rotating speed of half axle 8, differential mechanism 1 drives the driving gear 3 to rotate, the driving gear 3 drives the driven gear 4.1 of deceleration assembly to rotate, the driven gear 4.1 drives the gear shaft 4 to rotate, the gear shaft 4 drives the driving gear 4.2 to rotate, the driving gear 4.2 drives the forward gear 6 to rotate, and the rotating speed of the forward gear 6 will be less than the rotating speed of half axle 8 due to the deceleration assembly, at this time, the forward ratchet wheel 8.1 on half axle 8 quickly passes through the forward pawl 6.1, the ratchet differential lock does not play a role, and the car normally drives;

[0054] When the car is normally turning, due to the differential mechanism principle, the rotating speed of the side bevel gear 2 of differential mechanism 1 will be greater than the rotating speed of one side wheel half axle 8 and less than the rotating speed of the other side wheel half axle 8, and the rotating speed difference of left and right wheel half axles 8 will not be greater than 3 times when the car turns, at this time, the half axle 8 with slow rotating speed drives the corresponding forward ratchet wheel 8.1 to rotate, the rotating speed of the forward ratchet wheel 8.1 is still greater than the rotating speed of the forward gear 6, the forward ratchet wheel 8.1 quickly passes through the forward pawl 6.1, the half axle 8 with fast rotating speed on the other side drives the corresponding forward ratchet wheel 8.1 to rotate, and the forward ratchet wheel 8.1 also quickly passes through the forward pawl 6.1, the ratchet differential lock does not play a role, and the car normally turns;

[0055] When the wheel on one side of the car slips, due to the differential mechanism principle, the rotating speed of the half axle 8 on the slipping side will surge, and the rotating speed of the half axle 8 on the other side will rapidly decrease or stop, at this time, the side bevel gear 2 of differential mechanism 1 drives the driving gear 3 to rotate, the driving gear 3 drives the driven gear 4.1 to rotate, the driven gear 4.1 drives the gear shaft 4 to rotate, the gear shaft 4 drives the driving gear 4.2 to rotate, and the driving gear 4.2 still drives the forward pawl 6.1 to rotate around the half axle 8, when the rotating speed difference of the two half axles 8 is greater than 3 times, the rotating speed of the half axle 8 on the non-slipping side will be lower than the rotating speed of the forward gear 6, the forward pawl 6.1 will be clamped into the forward ratchet wheel 8.1, forcibly drives the forward ratchet wheel 8.1 to rotate, the forward ratchet wheel 8.1 drives the half axle 8 to rotate, plays a role of differential lock, and makes the wheel 10 on the non-slipping side also have power output;

[0056] When the car is reversing in a straight line, the operator engages reverse gear, and the shift fork 5 engages the drive gear 4.2 with the reverse gear 7. The side bevel gear 2 of the differential 1 rotates at the same speed as the half-shaft 8. The differential 1 drives the drive gear 3 to rotate, which in turn drives the driven gear 4.1 of the reduction assembly to rotate. The driven gear 4.1 drives the gear shaft 4 to rotate, which in turn drives the drive gear 4.2 to rotate. The drive gear 4.2 then drives the reverse gear 7 to rotate. Because the speed of the reduction assembly is less than that of the half-shaft 8, the reverse ratchet 8.2 quickly passes over the reverse pawl 7.1. The ratchet differential lock does not function, and the car continues to drive normally.

[0057] When a car is reversing and turning, due to the principle of differential 1, the rotation speed of the side bevel gear 2 of differential 1 will be greater than the rotation speed of one side wheel half shaft 8 and less than the rotation speed of the other side wheel half shaft 8. Usually, when the car is turning, the speed difference between the left and right wheel half shafts 8 will not be greater than 3 times. At this time, the slower half shaft 8 drives the corresponding reversing ratchet 8.2 to rotate. The rotation speed of the reversing ratchet 8.2 is still greater than the rotation speed of the reversing gear 7. The reversing ratchet 7 quickly passes over the reversing pawl 7.1. The faster half shaft 8 on the other side drives the corresponding reversing ratchet 8.2 to rotate. The reversing ratchet 8.2 also quickly passes over the reversing pawl 7.1. The ratchet differential lock does not play a role, and the car reverses and turns normally.

[0058] When a car is reversing and one wheel slips, due to the differential principle, the speed of the half-shaft 8 on the slipping side will surge, while the speed of the half-shaft 8 on the other side will rapidly decrease or stop. At this time, the bevel gear 2 on the side of the differential 1 drives the drive gear 3 to rotate, the drive gear 3 then drives the driven gear 4.1 to rotate, then the driven gear 4.1 drives the gear shaft 4 to rotate, the gear shaft 4 drives the drive gear 4.2 to rotate, and the drive gear 4.2 still drives the reversing pawl 7.1 to rotate around the half-shaft 8. When the speed difference between the two half-shafts 8 is greater than 3 times, the speed of the half-shaft 8 on the non-slipping side will be lower than the speed of the reversing gear 7. The reversing pawl 7.1 will engage with the reversing ratchet 8.2, forcibly driving the reversing ratchet 8.2 to rotate. The reversing ratchet 8.2 then drives the half-shaft 8 to rotate, acting as a differential lock, allowing the wheel on the non-slipping side to also have power output. Example 2

[0059] like Figures 1-13 As shown, according to Embodiment 1, a ratchet-type automotive differential lock has a drive gear 3 as the driving component. The rotational speed of the drive gear 3 is equal to the rotational speed of the side bevel gear 2 of the differential 1. The gear ratio between the drive gear 3 and the driven gear 4.1 is less than the gear ratio between the driving gear 4.2 and the forward gear 6, and also less than the gear ratio between the driving gear 4.2 and the reverse gear 7.

[0060] The side bevel gear 2 of the differential 1 provides rotational power to the drive gear 3. The gear ratio between the drive gear 3 and the driven gear 4.1 is less than the gear ratio between the driving gear 4.2 and the forward gear 6. When the car is driving straight and turning normally, the speed of the half shaft 8 is greater than the speed of the forward gear 6. The forward ratchet 8.1 quickly passes over the forward pawl 6.1, the ratchet differential lock does not work, and the car can drive straight and turn normally. Example 3

[0061] like Figures 1-13 As shown, in a ratchet-type automotive differential lock according to Embodiment 2, the number of teeth on the drive gear 4.2 is less than the number of teeth on the driven gear 4.1, so that the reduction assembly plays the role of speed reduction and torque increase, making the drive gear 3 sufficient to drive the ratchet and half shaft 8 to rotate. Example 4

[0062] like Figures 1-13 As shown, in a ratchet-type automotive differential lock according to Embodiment 3, the drive gear 3, forward gear 6, reverse gear 7, forward ratchet 8.1 and reverse ratchet 8.2 are all designed with the half shaft 8 as the axis, which makes the differential lock structure compact, stable, and space-saving, while also ensuring high coordination efficiency between the gears. Example 5

[0063] like Figures 1-13 As shown, in a ratchet-type automotive differential lock according to Embodiment 4, the drive gear 3, the forward gear 6, and the reverse gear 7 are all rotatably connected to the half-shaft 8, and the forward ratchet 8.1 and the reverse ratchet 8.2 are all transmission-fitted to the half-shaft 8.

[0064] The rotary connection allows the drive gear 3, the forward gear 6, and the reverse gear 7 to rotate freely on the half shaft 8. The transmission connection allows the forward ratchet 8.1 and the reverse ratchet 8.2 to drive the half shaft 8 to rotate, and the half shaft 8 can also drive the forward ratchet 8.1 and the reverse ratchet 8.2 to rotate. Example 6

[0065] like Figures 1-13 As shown, in a ratchet-type automotive differential lock according to Embodiment 5, a connecting seat 11 is provided between the forward gear 6 and the forward pawl 6.1, and a connecting seat 11 is also provided between the reverse gear 7 and the reverse pawl 7.1. The connecting seat 11 is connected to both the forward pawl 6.1 and the reverse pawl 7.1 by a rotating shaft. A spring 12 is also provided between the forward gear 6 and the forward pawl 6.1, and a spring 12 is also provided between the reverse gear 7 and the reverse pawl 7.1.

[0066] The connecting seat 11 provides necessary support for the plurality of forward pawls 6.1 and reverse pawls 7.1, and the spring 12 presses the forward pawls 6.1 against the forward ratchet wheel 8.1 or the reverse pawls 7.1 against the reverse ratchet wheel 8.2 through the rotating shaft, so that the pawls can engage the corresponding ratchet wheels and transmit power. Embodiment 7

[0067] As shown in Figures 1-13 the automobile differential lock in the form of a ratchet wheel according to Embodiment 6, the forward ratchet wheel 8.1 is adapted to the forward pawls 6.1 and is provided with forward ratchet teeth 8.1.1, the reverse ratchet wheel 8.2 is adapted to the reverse pawls 7.1 and is provided with reverse ratchet teeth 8.2.1, and the arrangement direction of the forward ratchet teeth 8.1.1 is opposite to that of the reverse ratchet teeth 8.2.1.

[0068] The forward pawls 6.1 or the reverse pawls 7.1 engage the corresponding ratchet teeth and drive the corresponding ratchet wheels to move, thereby helping the automobile to realize the differential lock function of forward movement or reverse movement.

[0069] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A form of automotive differential lock in the form of a ratchet, comprising a differential and half shafts, characterised in that, The half shaft is provided with a ratchet mechanism, the differential is provided with a driving member for driving the ratchet mechanism, the half shaft is further provided with a shift fork for moving the position of the ratchet mechanism, for switching forward or reverse gears, and a reduction assembly is arranged between the ratchet mechanism and the driving member.

2. A form of automotive differential lock in the form of a ratchet wheel according to claim 1, characterised in that The ratchet mechanism comprises a forward gear and a reverse gear, the forward gear is provided with a plurality of forward pawls, the half shaft is provided with a forward ratchet matched with the forward pawls, the reverse gear is provided with a plurality of reverse pawls, the half shaft is provided with a reverse ratchet matched with the reverse pawls, and the arrangement direction of the reverse pawls is opposite to that of the forward pawls.

3. A form of automotive differential lock in the form of a ratchet wheel according to claim 2, characterised in that The reduction assembly comprises a gear shaft, the gear shaft is provided with a driven gear and a driving gear, and the driving gear selectively engages with the forward gear or the reverse gear.

4. A form of automotive differential lock in the nature of a ratchet wheel as claimed in claim 3 wherein, The driving member is a driving gear, the driven gear engages with the driving gear, the rotation speed of the driving gear is equal to that of the side bevel gear of the differential, the tooth ratio of the driving gear to the driven gear is smaller than that of the driving gear to the forward gear, and also smaller than that of the driving gear to the reverse gear.

5. A form of automotive differential lock in the nature of a ratchet wheel as claimed in claim 4 wherein, The number of teeth of the driving gear is smaller than that of the driven gear.

6. A form of automotive differential lock in the nature of a ratchet wheel as claimed in claim 5 wherein, The driving gear, the forward gear, the reverse gear, the forward ratchet and the reverse ratchet are all designed with the half shaft as the center.

7. A form of automotive differential lock in the nature of a ratchet wheel as claimed in claim 6 characterised by, The driving gear, the forward gear and the reverse gear are all in rotational connection with the half shaft, and the forward ratchet and the reverse ratchet are both in transmission matching connection with the half shaft.

8. A form of automotive differential lock in the nature of a ratchet wheel as claimed in claim 7 characterised by, A connecting seat is arranged between the forward gear and the forward pawls, and a connecting seat is also arranged between the reverse gear and the reverse pawls, the connecting seat is in rotational connection with the forward pawls and the reverse pawls, a spring is further arranged between the forward gear and the forward pawls, and a spring is also arranged between the reverse gear and the reverse pawls.

9. A form of automotive differential lock in the nature of a ratchet wheel as claimed in claim 8 characterised by, The forward ratchet matched with the forward pawls is provided with forward ratchet teeth, the reverse ratchet matched with the reverse pawls is provided with reverse ratchet teeth, and the arrangement direction of the forward ratchet teeth is opposite to that of the reverse ratchet teeth.

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