Wheel-side speed reduction structure for drive axle

Abstract

The utility model discloses a hub deceleration structure for a drive axle, and relates to the technical field of deceleration structures, the hub deceleration structure comprises a protective shell and plugging plates symmetrically arranged on the two sides of the protective shell, a heat dissipation groove is formed in the end face of one side of the protective shell, and a dust cover matched with the heat dissipation groove is arranged at the end of one side of the protective shell. When the internal temperature of the protective shell is high, an arranged memory spring begins to contract under the action of high temperature, so that a sealing plate is pulled upwards, a reset tension spring is stretched, a heat dissipation groove is opened, the internal space of the protective shell communicates with the outside, and therefore the airflow flowing speed and the heat exchange speed in the protective shell are increased; and when the temperature in the protective shell returns to normal, a reset tension spring can pull a sealing plate to reset, a heat dissipation groove is blocked, and it is avoided that external sundries and dust enter the device to affect normal operation of the speed reduction mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reduction structures, in particular to a wheel-side speed reduction structure for a drive axle. Background Art

[0002] The drive axle is a mechanism located at the end of the transmission system that can change the speed and torque from the transmission and transmit them to the drive wheels. The drive axle is generally composed of a main reducer, a differential, a wheel transmission device and a drive axle housing, and the wheel-side reduction structure is a reduction and torque-increasing device of the drive axle. The use of a wheel-side reduction gear can meet the conditions of the same total transmission ratio, so that the load of the transmission, drive shaft, main reducer, differential, half-axle and other components is reduced, the size is reduced, and the drive axle has a larger ground clearance. It is widely used in heavy-duty trucks, large buses, off-road vehicles and some other large industrial and mining vehicles.

[0003] When most of the existing drive axle wheel-side reduction structures are in use, when the internal reduction gears are assembled inside the shell, the heat dissipation effect is poor. After the reduction gears continue to work for a long time, it is easy to cause the gears to overheat, causing the hardness and wear resistance of the gears to decrease, which will shorten the life of the gears. Long-term overheating will also accelerate the wear and aging process of the gears. Utility Model Content

[0004] The purpose of the utility model is to provide a wheel-side reduction structure for a drive axle to solve the technical problems mentioned in the above background technology.

[0005] The technical problem to be solved by the utility model can be achieved through the following technical solutions:

[0006] A wheel-side reduction structure for a drive axle, comprising a protective shell and blocking plates symmetrically arranged on both sides of the protective shell;

[0007] A heat dissipation groove is provided on one end face of the protective shell, a dust cover matching the heat dissipation groove is arranged on one end portion of the protective shell, a guide clamp is symmetrically arranged on the side wall of the protective shell with the heat dissipation groove, a sealing plate for sealing the heat dissipation groove is slidably arranged inside the guide clamp, a baffle is provided on the top of the sealing plate, a memory spring is provided on the top of the baffle, and the top of the memory spring is connected to the top wall of the protective shell, a reset spring is provided on the bottom of the sealing plate, and the bottom end of the reset spring is connected to the bottom wall of the protective shell.

[0008] As a further solution of the utility model: the protective shell and the blocking plate are fixedly connected by bolts, and the memory spring is made of shape memory alloy wire.

[0009] As a further solution of the utility model: a driving shaft is rotatably provided on one side of one group of blocking plates, and a driven shaft is rotatably provided on one side of another group of blocking plates, and the driven shaft is located above the driving shaft.

[0010] As a further solution of the utility model: a driving gear connected to the driving shaft is rotatably arranged inside the protective shell, a first reduction gear is meshed on the outer side of the driving gear, a second reduction gear is meshed on the outer side of the first reduction gear, a driven gear is meshed on the outer side of the second reduction gear, and one side of the driven gear is connected to the driven shaft.

[0011] As a further solution of the utility model: one end of the blocking plate is provided with three groups of fixing grooves distributed at intervals.

[0012] Beneficial effects of the utility model:

[0013] According to the utility model, when the temperature inside the protective shell is high, the memory spring starts to shrink under the action of high temperature, thereby pulling the sealing plate upward, the reset tension spring is stretched, and the heat dissipation groove is opened, so that the internal space of the protective shell is connected with the outside world, thereby accelerating the air flow speed and heat exchange rate inside the protective shell, further accelerating the heat dissipation efficiency of the deceleration mechanism arranged inside the protective shell, and extending the service life of the device; when the temperature inside the protective shell returns to normal, the reset tension spring can pull the sealing plate to reset, thereby sealing the heat dissipation groove, and preventing external debris and dust from entering the inside of the device and affecting the normal operation of the deceleration structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] Figure 1 It is a three-dimensional schematic diagram of the whole device in the utility model;

[0016] Figure 2 It is a schematic diagram of the overall structure of the device in the utility model.

[0017] In the figure: 1. Protective shell; 2. Sealing plate; 3. Driving shaft; 4. Driven shaft; 5. Driving gear; 6. First reduction gear; 7. Second reduction gear; 8. Driven gear; 9. Heat dissipation slot; 10. Dust cover; 11. Guide clamping plate; 12. Sealing plate; 13. Baffle; 14. Memory spring; 15. Reset spring; 16. Fixing slot. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-2 As shown, a wheel-side reduction structure for a drive axle comprises a protective shell 1 and blocking plates 2 symmetrically arranged on both sides of the protective shell 1, the protective shell 1 and the blocking plates 2 are fixedly connected by bolts, a driving shaft 3 is rotatably arranged on one side of one group of blocking plates 2, a driven shaft 4 is rotatably arranged on one side of another group of blocking plates 2, and the driven shaft 4 is located above the driving shaft 3, a driving gear 5 connected to the driving shaft 3 is rotatably arranged inside the protective shell 1, a first reduction gear 6 is meshedly arranged on the outer side of the driving gear 5, a second reduction gear 7 is meshedly arranged on the outer side of the first reduction gear 6, and a driven gear 8 is meshedly arranged on the outer side of the second reduction gear 7, One side of the driven gear 8 is connected to the driven shaft 4. The protective shell 1 and the blocking plate 2 constitute the main structure of the device, which provides good support and protection for the speed reduction mechanism arranged inside. When the driving shaft 3 rotates, the driving gear 5 thereon drives the first reduction gear 6 to rotate, thereby achieving a first speed reduction effect. At this time, the first reduction gear 6 drives the second reduction gear 7 to rotate synchronously, and then speeds up again. The second reduction gear 7 synchronously drives the driven gear 8 to reduce speed for the last time. The driven gear 8 is connected to the driven shaft 4, so that the driving shaft 3 can drive the driven shaft 4 to rotate at a relatively low speed, thereby effectively achieving the purpose of speed reduction.

[0020] A heat dissipation groove 9 is provided on one end face of the protective shell 1, and a dust cover 10 matching the heat dissipation groove 9 is provided on one end of the protective shell 1. A guide clamp 11 is symmetrically provided on the side wall of the protective shell 1 on which the heat dissipation groove 9 is provided. A sealing plate 12 for blocking the heat dissipation groove 9 is slidably provided inside the guide clamp 11. A baffle 13 is provided on the top of the sealing plate 12, and a memory spring 14 is provided on the top of the baffle 13. The memory spring 14 is made of shape memory alloy wire, and the top of the memory spring 14 is connected to the top wall of the protective shell 1. A reset spring 15 is provided at the bottom of the sealing plate 12, and the bottom end of the reset spring 15 is connected to the bottom wall of the protective shell 1. The heat dissipation groove 9 is used to further accelerate the heat diffusion inside the device, thereby playing a role in cooling. Inside the protective shell 1 When the deceleration mechanism is working normally, the sealing plate 12 blocks the heat dissipation slot 9 to prevent foreign matter and dust from entering the device and affecting the normal operation of the deceleration structure. At this time, the memory spring 14 is in a stretched state, and the reset spring 15 pulls the sealing plate 12 downward, so that the baffle 13 arranged on the top of the sealing plate 12 is pressed on the top of the guide clamping plate 11, thereby ensuring the stability of the sealing plate 12 when blocking. When the deceleration mechanism continues to work for a long time, the temperature in the protective shell 1 gradually increases, causing the memory spring 14 to begin to shrink, thereby pulling the sealing plate 12 upward, so that the reset spring 15 is stretched, the heat dissipation slot 9 is opened, and the heat dissipation speed of the device is accelerated. When the temperature in the protective shell 1 returns to normal, the reset spring 15 can pull the sealing plate 12 to reset and block the heat dissipation slot 9 again.

[0021] In this embodiment, specifically, three groups of spaced apart fixing grooves 16 are provided at one end of the blocking plate 2. The fixing grooves 16 provided on the blocking plate 2 are used to install corresponding bolts, which can fix the entire device on the drive axle, thereby ensuring the overall stability of the device when in use.

[0022] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A wheel-side reduction structure for a drive axle, comprising a protective shell (1) and blocking plates (2) symmetrically arranged on both sides of the protective shell (1); characterized in that: A heat dissipation groove (9) is provided on one end face of the protective shell (1), and a dust cover (10) matching the heat dissipation groove (9) is provided on one end of the protective shell (1). A guide clamp (11) is symmetrically provided on the side wall of the protective shell (1) on which the heat dissipation groove (9) is provided. A sealing plate (12) for sealing the heat dissipation groove (9) is slidably provided inside the guide clamp (11). A baffle (13) is provided on the top of the sealing plate (12), and a memory spring (14) is provided on the top of the baffle (13), and the top of the memory spring (14) is connected to the top wall of the protective shell (1). A reset spring (15) is provided on the bottom of the sealing plate (12), and the bottom end of the reset spring (15) is connected to the bottom wall of the protective shell (1).

2. The wheel-side reduction structure for a drive axle according to claim 1, characterized in that: The protective shell (1) and the blocking plate (2) are fixedly connected by bolts, and the memory spring (14) is made of a wound shape memory alloy wire.

3. The wheel-side reduction structure for a drive axle according to claim 1, characterized in that: One side of one group of blocking plates (2) is rotatably provided with a driving shaft (3), and one side of another group of blocking plates (2) is rotatably provided with a driven shaft (4), and the driven shaft (4) is located above the driving shaft (3).

4. The wheel-side reduction structure for a drive axle according to claim 1, characterized in that: A driving gear (5) connected to a driving shaft (3) is rotatably provided inside the protective shell (1); a first reduction gear (6) is meshed with the outer side of the driving gear (5); a second reduction gear (7) is meshed with the outer side of the first reduction gear (6); a driven gear (8) is meshed with the outer side of the second reduction gear (7); and one side of the driven gear (8) is connected to the driven shaft (4).

5. The wheel-side reduction structure for a drive axle according to claim 1, characterized in that: One end of the blocking plate (2) is provided with three groups of fixed grooves (16) distributed at intervals.

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