Large-swing-angle outer ball cage with sliding stroke

Abstract

The large-swing-angle outer ball cage with the sliding stroke comprises a bell-shaped shell, a star-shaped sleeve, a holder and a steel ball, an inner cavity of the bell-shaped shell comprises a front cavity and a rear cavity which are formed in parallel from front to back, one side of the front cavity is communicated with the rear cavity, an opening communicated with the external space is formed in the other side of the front cavity, and the star-shaped sleeve is arranged in the inner cavity of the bell-shaped shell. The starlike sleeve, the retainer and the steel ball are all arranged in the front cavity; and the bell housing is chamfered at the opening position of the front cavity to form a flaring section. According to the technical scheme, the rear cavity design of the inner cavity of the bell-shaped shell enables the driving shaft and the bell-shaped shell to stretch out and draw back, relative movement of a certain distance is allowed to be generated between the driving shaft and the bell-shaped shell when a vehicle runs in a complex road condition, stability of power transmission is guaranteed, and meanwhile the driving shaft and the bell-shaped shell can be effectively protected. Due to the design of the flaring section of the bell-shaped shell, the total height of the cavity wall of the front cavity of the inner cavity is reduced, so that the driving shaft can obtain a wider swing angle range, the turning angle of the wheel is correspondingly increased, and the device can be further suitable for large vehicles such as mountain bikes and agricultural vehicles.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle transmission systems, in particular to an outer ball cage with a large swing angle and a sliding stroke. Background Art

[0002] The outer ball cage is a key component in the vehicle transmission system. It is connected to the driving shaft and the wheel hub, and closely affects the turning angle of the wheel and the stability of the vehicle's driving. For large vehicles such as mountain bikes and agricultural vehicles, due to their large body size, their turning radius is usually also large. In order to achieve effective turning in a narrow space, these vehicles need to have higher steering flexibility so that they can complete turning operations in a limited space, enabling them to operate efficiently in a variety of working environments.

[0003] At present, conventional outer ball cages cannot provide a larger wheel turning angle and driving stability. For example, the Chinese patent with announcement number CN208664824U applied on June 9, 2018 and authorized on March 19, 2019 discloses an outer ball cage in a drive axle assembly as an example, which includes a spline shaft, a plug pin groove is radially opened on the left side of the spline shaft body, a bell-shaped shell is arranged at the right end of the spline shaft, a connecting edge is arranged on the right side of the outer wall of the bell-shaped shell, and a limiting ring is rigidly connected to the internal part of the connecting edge. A retaining frame is embedded in the inner cavity of the bell-shaped shell, and steel balls are evenly embedded at the edges of the retaining frame. A transverse groove is opened on the inner wall of the bell-shaped shell, and the steel balls are arranged in the transverse groove. An inner spline sleeve is arranged on the left side of the inner part of the retaining frame, and the steel balls are supported between the transverse groove and the inner spline sleeve.

[0004] Although the limit ring set at the opening position of the inner cavity of the bell-shaped shell of the outer ball cage of the above-mentioned structure can limit the dislocation of the steel ball, it also reduces the opening diameter of the inner cavity of the bell-shaped shell, so that the angle range of the driving shaft when swinging is limited, resulting in the vehicle being unable to achieve the required wheel turning angle when turning, limiting the vehicle's control flexibility and maneuverability. In addition, there is no expansion and contraction between the driving shaft and the bell-shaped shell, resulting in the inability to automatically adjust the length during the vehicle's driving process as the wheel bounces up and down and the angle changes during turning to adapt to different driving conditions and road conditions, and the smoothness of power transmission cannot be guaranteed. Therefore, it is not suitable for large vehicles such as mountain bikes and agricultural vehicles that have more stringent requirements on turning radius and driving stability. Utility Model Content

[0005] In view of the above situation, in order to overcome the problem that the swing angle range of the driving shaft is small when the conventional outer ball cage in the above-mentioned prior art is applied to the vehicle system, resulting in the vehicle being unable to reach the required wheel turning angle when turning, and there is no telescopic amount between the driving shaft and the bell-shaped shell, which affects the smoothness of power transmission, the purpose of the utility model is to provide an outer ball cage with a large swing angle range of the driving shaft, thereby increasing the wheel turning angle, making the vehicle flexible in steering, and at the same time, the driving shaft and the bell-shaped shell are telescopic, which can ensure smooth power transmission, and can also be applied to large vehicles such as mountain bikes and agricultural vehicles.

[0006] In order to achieve the above purpose, the technical solution of the utility model is:

[0007] The invention discloses an outer ball cage with a large swing angle and a sliding stroke, comprising a bell-shaped shell, a star-shaped sleeve, a retaining frame and a steel ball. The inner cavity of the bell-shaped shell comprises a front cavity and a rear cavity which are arranged in parallel from front to back. One side of the front cavity is connected with the rear cavity, and the other side forms an opening connected with the external space. The star-shaped sleeve, the retaining frame and the steel ball are all arranged in the front cavity. The bell-shaped shell is chamfered at the opening position of the front cavity to form a flared section.

[0008] Preferably, the chamfer angle of the flared section is 45°.

[0009] Preferably, inner diameters of the front cavity and the rear cavity on the proximal side thereof converge toward each other.

[0010] Preferably, the number of inner ball lanes in the front cavity for mounting steel balls is at least 6.

[0011] Preferably, the edge of the inner ballway in the front cavity for mounting the steel ball is chamfered.

[0012] Preferably, a spline shaft is formed on a side of the bell housing facing away from the inner cavity.

[0013] Preferably, the surface of the bell housing is sprayed with anti-rust oil.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] The design of the rear cavity of the bell-shaped housing creates an expansion and contraction amount between the driving shaft and the bell-shaped housing, providing space for the driving shaft to slide axially relative to the bell-shaped housing, allowing a certain distance of relative movement between the driving shaft and the bell-shaped housing when the vehicle is driving on complex road conditions, thereby ensuring the smoothness of power transmission. At the same time, the design of the expanded section of the bell-shaped housing reduces the overall height of the cavity wall of the front cavity of the inner cavity, so that the driving shaft can obtain a wider swing angle range, which correspondingly increases the turning angle of the wheel, greatly improving the vehicle's handling flexibility and maneuverability on complex roads, and can also be effectively adapted to large vehicles such as mountain bikes and agricultural vehicles that have more stringent requirements on turning radius and driving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the outer ball cage of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the outer ball cage of the utility model when viewed from above;

[0018] Figure 3 This utility model Figure 1 A schematic diagram of the cross-sectional structure of the AA portion;

[0019] Figure 4 This utility model Figure 1 Schematic diagram of the cross-sectional structure of the AA part after removing the star sleeve, cage and steel ball;

[0020] Figure 5 This utility model Figure 3 A schematic diagram of the enlarged structure of part A;

[0021] Figure 6 This utility model Figure 3 Schematic diagram of the enlarged structure of part B.

[0022] As shown in the figure:

[0023] 1. Bell-shaped housing; 101. Inner cavity; 101a. Front cavity; 101b. Rear cavity; 101c. Expanded section; 102. Inner ballway; 103. Spline shaft; 2. Star sleeve; 3. Cage; 4. Steel ball. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of simplifying the description, and do not indicate or imply that the directions are specific directions that must be possessed and specific directions, structures, and operations, and therefore should not be understood as limitations on the present utility model.

[0026] like Figures 1 to 5As shown, the utility model relates to an outer ball cage with a large swing angle and a sliding stroke, which includes a bell-shaped shell 1, a star-shaped sleeve 2, a retainer 3 and a steel ball 4, wherein the bell-shaped shell 1 has an inner cavity 101, the retainer 3 is sleeved outside the star-shaped sleeve 2 and embedded in the inner cavity 101 at the same time, an inner ball track 102 is opened on the cavity wall of the inner cavity 101 of the bell-shaped shell 1, and an outer ball track and a through groove are opened on the star-shaped sleeve 2 and the retainer 3 respectively, the outer ball track, the inner ball track 102 and the through groove correspond to each other one by one, and together form a raceway, the steel ball 4 is embedded in the raceway and can roll along the raceway, the above is different from the existing conventional The structure of the outer ball cage is consistent with that of the outer ball cage, so the more specific structure will not be further described. In particular, the inner cavity 101 of the bell-shaped housing 1 is different from the existing conventional outer ball cage in that the inner cavity 101 of the bell-shaped housing 1 is composed of a front cavity 101a and a rear cavity 101b. The front cavity 101a and the rear cavity 101b are opened side by side from front to back. One side of the front cavity 101a is connected to the rear cavity 101b, and the other side forms an opening connected to the external space. The rear cavity 101b is also connected to the external space through the opening of the front cavity 101a. The star sleeve 2, the retainer 3 and the steel ball 4 are all arranged in the front cavity In the body 101a, the bell-shaped housing 1 is chamfered at the opening position of the front cavity 101a to form a flared section 101c. The outer ball cage of the utility model increases the axial length of the entire inner cavity 101 by designing the inner cavity 101 of the bell-shaped housing 1 as a two-stage structure consisting of the front cavity 101a and the rear cavity 101b. In the vehicle system, the driving shaft is connected to the star sleeve 2, and the driving shaft is located in the front cavity 101a of the inner cavity 101 relative to the bell-shaped housing 1. The rear cavity 101b forms a telescopic amount between the driving shaft and the bell-shaped housing 1, providing the driving shaft with an axial relative to the bell-shaped housing 1. The space for sliding allows a certain distance of relative movement between the driving shaft and the bell-shaped housing 1 when the vehicle is traveling on complex road conditions, thereby ensuring the stability of power transmission. At the same time, the design of the expanded section 101c of the bell-shaped housing 1 reduces the overall height of the cavity wall of the front cavity 101a of the inner cavity 101, so that the driving shaft can obtain a wider swing angle range, and correspondingly increase the turning angle of the wheel, which greatly improves the control flexibility and maneuverability of the vehicle on complex roads, and can also be effectively adapted to large vehicles such as mountain vehicles and agricultural vehicles that have more stringent requirements on turning radius and driving stability.

[0027] like Figure 5 As shown, the swing angle of the driving shaft of the conventional outer ball cage is generally not more than 25°. The outer ball cage of the utility model designs the chamfer angle of the expanded section 101c on the inner cavity 101 of the bell-shaped shell 1 to be 45°, so that the maximum swing angle of the driving shaft is increased to 45°, which greatly increases the wheel turning angle to be better suitable for large vehicles such as mountain vehicles and agricultural vehicles.

[0028] like Figure 3 and Figure 4As shown, the inner diameters of the approaching sides of the front cavity 101a and the rear cavity 101b converge towards each other to reduce the inner diameter at the transition between the front cavity 101a and the rear cavity 101b. Based on the above arrangement, the bell housing 1, the retaining frame 3 and the steel balls 4 can be prevented from detaching from the front cavity 101a, thereby improving the stability after installation.

[0029] like Figure 2 As shown, the number of inner ball channels 102 for installing the steel balls 4 in the front cavity 101a is at least 6. It can be understood that the number of outer ball channels and through grooves on the star sleeve 2 and the retaining frame 3 is at least 6. By increasing the number of inner ball channels 102, the number of steel balls 4 is increased accordingly, thereby increasing the contact points between the steel balls 4 and the bell shell 1 to disperse the contact pressure, reduce the wear of the contact points generated by a single steel ball 4, and extend the service life of the entire outer ball cage. At the same time, the increase in the number of inner ball channels 102 also enables the width of each inner ball channel 102 to be reduced, so as to reduce the requirements for the diameter of the steel balls 4, thereby significantly reducing the overall mass of the entire outer ball cage. The lightweight outer ball cage can reduce the moment of inertia and achieve a smoother transmission of power.

[0030] like Figure 2 As shown, the edge of the inner ball channel 102 for installing the steel ball 4 in the front cavity 101a is chamfered. The chamfer reduces the sharp edge of the side edge of the inner ball channel 102, thereby reducing stress concentration to protect the steel ball 4. The chamfer setting helps the steel ball 4 to enter and exit the inner ball channel 102 more easily during assembly, improves the smoothness of the assembly process, and reduces the risk of damage during assembly. In addition, it can also improve the flow of lubricating oil, help the lubricating oil to be more evenly distributed between the inner ball channel 102 and the steel ball 4, improve the lubrication effect, and reduce wear.

[0031] like Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, a spline shaft 103 is formed on the side of the bell housing 1 facing away from the inner cavity 101 , and the bell housing 1 is connected with other components of the vehicle system through the spline shaft 103 to transmit torque.

[0032] Furthermore, the surface of the bell-shaped housing 1 is sprayed with anti-rust oil, which forms a protective film on the outer surface of the bell-shaped housing 1. The protective film isolates air, moisture or other corrosive media, prevents the bell-shaped housing 1 from corrosion during storage, transportation or use, and extends the service life of the entire outer cage.

[0033] Combination Figures 1 to 6The outer ball cage of the utility model can be applied to large vehicles such as mountain vehicles and agricultural vehicles that have stricter requirements on turning radius and driving stability. Due to the existence of the rear cavity 101b of the inner cavity 101, when the vehicle is driving, the driving shaft of the vehicle can move and retract relative to the bell-shaped shell 1 to better adapt to complex roads and ensure the stability of power transmission. At the same time, the design of the expanded section 101c of the bell-shaped shell 1 reduces the overall height of the cavity wall of the front cavity 101a of the inner cavity 101, so that the driving shaft can obtain a wider swing angle range, correspondingly increase the turning angle of the wheel, and greatly improve the vehicle The control flexibility and maneuverability when driving on complex roads. In addition, the convergent design of the transition between the front cavity 101a and the rear cavity 101b of the inner cavity 101 of the bell-shaped housing 1 can effectively prevent the star sleeve 2, the retaining frame 3 and the steel balls 4 from dislocating. The design of multiple steel balls 4 and raceways can achieve the goal of overall lightweight, so as to reduce the moment of inertia when the vehicle is driving and realize a smoother power transmission. The spline shaft 103 helps the bell-shaped housing 1 to resist bending and torsional stresses. The anti-rust oil can increase the service life of the bell-shaped housing 1 and reduce the occurrence of problems such as wear and corrosion caused by long-term use.

[0034] The above embodiments and descriptions are only for explaining the principle and the best embodiment of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements shall fall within the scope of the present invention to be protected.

Claims

1. An outer ball cage with a large swing angle and a sliding stroke, comprising a bell-shaped housing (1), a star-shaped sleeve (2), a retaining frame (3) and a steel ball (4), characterized in that: The inner cavity (101) of the bell-shaped housing (1) comprises a front cavity (101a) and a rear cavity (101b) which are arranged side by side from front to back; one side of the front cavity (101a) is connected to the rear cavity (101b), and the other side forms an opening connected to the external space; the star-shaped sleeve (2), the retaining frame (3) and the steel ball (4) are all arranged in the front cavity (101a); and the bell-shaped housing (1) is chamfered at the opening position of the front cavity (101a) to form a flared section (101c).

2. The outer ball cage with a large swing angle and a sliding stroke according to claim 1, characterized in that: The chamfer angle of the flared section (101c) is 45°.

3. The outer ball cage with a large swing angle and a sliding stroke according to claim 1, characterized in that: The inner diameters of the front cavity (101a) and the rear cavity (101b) on the proximal sides thereof converge toward each other.

4. The outer ball cage with a large swing angle and a sliding stroke according to claim 1, characterized in that: The number of the inner ball paths (102) in the front cavity (101a) for installing the steel balls (4) is at least 6.

5. An outer ball cage with a large swing angle and a sliding stroke according to claim 1 or 4, characterized in that: The edge of the inner ball path (102) in the front cavity (101a) for mounting the steel ball (4) is chamfered.

6. The outer ball cage with a large swing angle and a sliding stroke according to claim 1, characterized in that: A spline shaft (103) is formed on the side of the bell-shaped housing (1) facing away from the inner cavity (101).

7. The outer ball cage with a large swing angle and a sliding stroke according to claim 1, characterized in that: The surface of the bell-shaped housing (1) is sprayed with anti-rust oil.

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