Steel belt chain pushing piece

Abstract

The utility model provides a steel belt chain pushing piece, and relates to the technical field of continuously variable transmissions, a plurality of lubricating grooves are formed in friction surfaces at the left end and the right end of a pushing piece body, and conical half angles of end surfaces on two sides are properly corrected according to the size of transmitted torque, so that the two sides can be uniformly abraded, and the instability of variable-speed operation of a system is reduced. And the scale marks for marking the wear limit of the lubricating groove are arranged on the push piece body, so that the service life of the steel belt chain system is warned, and the problem that a user cannot master the replacement frequency can be solved. The lubricating grooves are unequal in depth, so that the problem of simultaneous failure of the lubricating grooves can be avoided. The lightening holes are additionally formed in the push piece body, the functions of light weight and transmission efficiency improvement can be achieved, and the heat dissipation grooves are formed, so that the temperature of the steel belt in the operation process can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of continuously variable transmissions, in particular to a steel belt chain push piece. Background Art

[0002] At present, there are five types of automobile transmissions widely used on the market, namely manual transmission (MT), electronically controlled mechanical transmission (AMT), dual-clutch automatic transmission (DCT), hydraulic automatic transmission (AT) and continuously variable transmission (CVT).

[0003] Continuously variable transmissions (CVTs), with their smooth shifting, fuel-saving, and cost-effective advantages, have captured over 20% of the transmission market share. However, issues such as slippage during shifting and short lifespan remain key constraints. Especially during high-speed operation, the friction surfaces of the pusher plates are squeezed on one side by the hydraulically driven bevel gear, while the other side is passively shifted. Together, these two sides achieve the desired pitch circle, thus changing the transmission ratio. This results in different degrees of wear on both sides. Furthermore, the narrow gaps between the pusher plates, which comprise the steel belt, slow heat dissipation, resulting in relatively high operating temperatures for the entire system, impacting the lifespan of the pusher plates. Utility Model Content

[0004] The present invention discloses a steel belt chain push piece, which improves the structure of the friction surfaces on both sides and the shape of the lubrication groove, can achieve the effect of uniform wear, enhance the stability of the system operation, and is designed with a weight reduction and heat dissipation structure, thereby increasing the service life of the push piece and even the entire steel belt chain system.

[0005] In order to achieve the above purpose, the technical solution of this novel invention is:

[0006] A steel belt chain push piece includes a push piece body. The left and right ends of the push piece body are distributed with a plurality of lubrication grooves of unequal depth. The lubrication grooves are used to store lubricating oil. A plurality of scale lines for marking the extreme wear depths of the left and right ends are provided on the surface of the push piece body.

[0007] Preferably, the scale lines are arranged horizontally, and the outer ends of the scale lines are located at the bottom of the designated lubrication groove.

[0008] Preferably, the lubrication groove is an arc-shaped groove, a trapezoidal groove, or a waist-shaped groove, and the groove depth is less than 0.3 mm.

[0009] Preferably, the outer surface of the push piece body is provided with heat dissipation grooves and weight-reducing holes.

[0010] Preferably, the left and right end faces of the push piece body are asymmetric, and the conical half angle α of the end face in contact with the active bevel gear is larger than the conical half angle β of the end face in contact with the driven bevel gear.

[0011] Preferably, the push piece body is provided with a driving bevel gear matched therewith, and the angle of the conical half angle α satisfies that: when the driving bevel gear is subjected to a lateral horizontal hydraulic impact force, the friction force between the driving bevel gear and the corresponding side end surface of the push piece body is C, and the friction force between the driven bevel gear and the corresponding side end surface of the push piece body is D, and C=D.

[0012] The beneficial effects of this new type of steel belt chain push piece:

[0013] 1. This new model proposes a steel belt chain push piece. The friction surfaces on the left and right ends of the push piece body are provided with a number of lubrication grooves, and the conical half angles of the end faces on both sides are appropriately modified according to the size of the transmitted torque, which can achieve uniform wear on both sides and reduce the instability of the speed change operation of the system.

[0014] 2. The pusher body is equipped with scale lines marking the wear limit of the lubrication grooves, which serve as a warning for the life of the steel belt chain system and can solve the problem of users not being able to grasp the replacement frequency. The lubrication grooves are of different depths to avoid the problem of simultaneous failure of the lubrication grooves.

[0015] 3. The pusher body is equipped with weight-reducing holes to achieve lightweight and improve transmission efficiency. Heat dissipation slots are set to effectively reduce the temperature of the steel belt during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments, which constitute a part of the specification and are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation to the present invention.

[0017] Figure 1 This is a steel belt chain push piece structure diagram.

[0018] Figure 2 This is a partial enlarged view of the lubrication groove.

[0019] Figure 3 It is a schematic diagram of the lubrication groove shape.

[0020] Figure 4 This is a schematic diagram of the principle of achieving uniform wear on the left and right ends of the push piece body in this novel method.

[0021] 1. Lubrication groove; 1-1, scale line; 2. Weight reduction hole; 3. Heat dissipation groove; 4. Driving bevel gear; 5. Driven bevel gear; 6. Lateral horizontal hydraulic impact force. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] The following embodiments may be understood as explaining a local structure of the present invention individually, or may be understood as explaining a larger structure of the present invention through a combination of multiple embodiments.

[0024] Example 1

[0025] A steel belt chain push piece, such as Figure 1 、 2 As shown, it includes a push piece body, and a plurality of non-uniform depth lubrication grooves 1 are distributed on the left and right ends of the push piece body. The lubrication grooves 1 are used to store lubricating oil, and a plurality of scale lines 1-1 are provided on the surface of the push piece body to mark the extreme wear depths of the left and right ends.

[0026] In this embodiment, the provision of lubrication grooves 1 of varying depths prevents simultaneous wear of several lubrication grooves 1 from causing them to completely cease to function as lubricant. This ensures that even if some lubrication grooves 1 are worn, the ends of the pusher body and the corresponding conical wheel surfaces still maintain a good lubrication effect. The provision of scale lines 1-1 serves to identify whether the pusher body has been worn to a critical depth. If so, the steel belt cannot be used and needs to be replaced.

[0027] Example 2

[0028] like Figure 2 As shown, the scale line 1-1 is arranged horizontally, and the outer end of the scale line 1-1 is located at the bottom of the designated lubrication groove 1. That is, when the steel belt is worn to the bottom of the groove, it means that the steel belt has failed.

[0029] Example 3

[0030] like Figure 3 As shown, the lubrication groove 1 is an arc-shaped groove, a trapezoidal groove, or a waist-shaped groove, and the groove depth is less than 0.3 mm.

[0031] Example 4

[0032] like Figure 1 As shown, the outer surface of the push piece body is provided with a heat dissipation groove 3 and a weight reduction hole 2.

[0033] Example 5

[0034] like Figure 1 As shown, the left and right end faces of the push piece body are asymmetrical, and the conical half angle α of the end face on the side contacting the active bevel gear is larger than the conical half angle β of the end face on the side contacting the driven bevel gear.

[0035] like Figure 4 As shown, the push piece body is equipped with a driving bevel gear 4 that cooperates with it. The angle of the cone half angle α satisfies: when the driving bevel gear 4 is subjected to a lateral horizontal hydraulic impact force 6, the friction force between the driving bevel gear 4 and the corresponding side end surface of the push piece body is C, and the friction force between the driven bevel gear 5 and the corresponding side end surface of the push piece body is D, and C=D.

[0036] like Figure 4 As shown in the figure, a principle diagram of the present embodiment is given. By adjusting the angle of the cone half-angle α and adjusting the degree of the cone half-angle of the active bevel wheel at the same time, the horizontal hydraulic impact force 6 can be changed in the vertical direction of the side end face of the push piece body (that is, the positive pressure F of the side end face is changed). By properly adjusting the angle of the cone half-angle α, the friction between the left and right ends of the push piece body and the corresponding cone wheel can be made the same (refer to the friction force calculation formula F=μ×Fn. According to the friction coefficient of the two side end faces and the positive pressure received, when the horizontal hydraulic impact force 6 is constant, the friction force of the side end face of the push piece body on the side of the driven bevel wheel can be obtained by calculation or experiment. Then, in order to make the friction forces of the two side end faces the same, the angle of the cone half-angle α that needs to be adjusted can be obtained, thereby achieving the effect of uniform wear of the left and right ends.

Claims

1. A steel belt chain push piece, comprising a push piece body, characterized by: The left and right ends of the push piece body are provided with a plurality of lubrication grooves of unequal depth for storing lubricating oil. The surface of the push piece body is provided with a plurality of scale lines for marking the extreme wear depths of the left and right ends.

2. A steel belt chain push piece according to claim 1, characterized in that: The scale lines are arranged horizontally, and the outer ends of the scale lines are located at the bottoms of the designated lubrication grooves.

3. The steel belt chain push piece according to claim 1, characterized in that: The lubricating groove is an arc-shaped groove, a trapezoidal groove or a waist-shaped groove, and the groove depth is less than 0.3 mm.

4. The steel belt chain push piece according to claim 1, characterized in that: The outer surface of the push piece body is provided with heat dissipation grooves and weight reduction holes.

5. The steel belt chain push piece according to claim 1, characterized in that: The left and right end faces of the push piece body are asymmetrical, and the conical half angle α of the end face in contact with the active bevel gear is larger than the conical half angle β of the end face in contact with the driven bevel gear.

6. A steel belt chain push piece according to claim 5, characterized in that: The push piece body is equipped with a driving bevel gear matched therewith, and the angle of the conical half angle α satisfies that: when the driving bevel gear is subjected to a lateral horizontal hydraulic impact force, the friction force between the driving bevel gear and the corresponding side end surface of the push piece body is C, and the friction force between the driven bevel gear and the corresponding side end surface of the push piece body is D, and C=D.

Images