Eight-ball type straight-channel telescopic inner ball cage
By designing an eight-ball straight channel retractable inner ball cage, the combination of bell-shaped shell, star sleeve and cage is used to add multiple stress points, solving the problems of uneven wear and low product qualification rate of the existing inner ball cage, achieving stable transmission and improved durability.
Patent Information
- Application Number
- CN202421513507.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing three-point inner ball cages are prone to wear and uneven wear after long-term use, causing the vehicle to accelerate and shake. The bell-shaped shell production process of the transmission wheel is not high, and the heat treatment is easy to deform, resulting in low product pass rate and not durable.
An eight-ball straight channel retractable inner ball cage is designed. Through the cooperation of the bell-shaped shell, star sleeve and cage, eight steel balls are used as the transmission ratio to increase multiple stress points, increase the torque transmission frequency, and achieve stable transmission.
This design increases the torque transmission frequency through multi-point stress, achieves smooth transmission, extends the service life of the product, and reduces production costs.
Smart Images
Figure CN222782913U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile accessories, in particular to an eight-ball straight-channel telescopic inner ball cage. Background Art
[0002] The inner ball cage is an important component of the car's transmission system. It is responsible for transmitting the engine power from the transmission to the two front wheels to drive the vehicle. The inner ball cage and the outer ball cage are collectively called the ball cage. The old model has three stress points of the three-pronged inner ball cage. After long-term use, it will cause uneven wear and lead to unsafe vehicle acceleration jitter. In addition, the three transmission wheels of the old model are connected by a tripod positioning connection and the bell shell production process is not high, and it is easy to deform during heat treatment, resulting in low product qualification rate and poor durability in the later stage. Utility Model Content
[0003] 1. Technical issues to be resolved
[0004] In view of the deficiencies in the prior art, the utility model provides an eight-ball straight-channel telescopic inner ball cage, which solves the problems raised in the above-mentioned background technology.
[0005] (II) Technical solution
[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: an eight-ball straight channel telescopic inner ball cage, including a bell-shaped shell, a star-shaped sleeve and a retaining frame, the front end of the bell-shaped shell is provided with a connecting cavity, the inner wall of the connecting cavity is provided with an inner arc straight groove, the outer side of the star-shaped sleeve is provided with an outer sleeve arc surface, the periphery of the outer sleeve arc surface is provided with an outer sleeve arc straight groove, the middle of the star-shaped sleeve is provided with a spline hole, the outer side of the retaining frame is provided with an outer frame arc surface, the interior of the retaining frame is provided with an inner frame arc surface, a limiting hole is provided between the inner frame arc surface and the outer frame arc surface, and steel balls are provided between the inner cavity arc straight groove, the outer sleeve arc straight groove and the limiting hole.
[0007] Preferably, the number of the arc-shaped straight grooves in the cavity, the arc-shaped straight grooves outside the sleeve and the limiting holes are eight and are evenly distributed in the circumferential direction. The positions of the three correspond one to one and steel balls are embedded as torque transmission components so that the bell housing, star-shaped sleeve and retaining frame must rotate synchronously.
[0008] Preferably, the retaining frame is installed in the connecting cavity, and the outer diameter of the retaining frame is smaller than the inner diameter of the connecting cavity. The retaining frame can be deflected by a certain angle in the connecting cavity by setting the outer arc surface of the frame.
[0009] Preferably, the star-shaped sleeve is installed inside the retaining frame and the outer arc surface of the sleeve is concentric with the inner arc surface of the frame, wherein the outer diameter of the outer arc surface of the sleeve is smaller than the inner diameter of the inner arc surface of the frame so that the star-shaped sleeve can deflect a certain angle in the retaining frame.
[0010] Preferably, the width dimension of the limiting hole in the direction of the central axis is slightly larger than the outer diameter dimension of the steel ball, so that the steel ball can be easily placed in the limiting hole, and all the steel balls can be confined in the limiting hole. The width dimension of the limiting hole in the tangential direction is larger than the diameter dimension of the steel ball. When the swing angle rotation motion is generated, the steel ball can move left and right along the tangential direction.
[0011] Preferably, the connecting rod splines behind the bell housing are used to connect the transmission components of the transmission differential and the transmission components of the front wheels respectively. The torque is transmitted to the wheels through the eight stress points of the eight-bead straight channel of the inner ball cage. Due to the large number of stress points, the torque transmission frequency is high, thereby improving the smoothness.
[0012] (III) Beneficial effects
[0013] The utility model provides an eight-ball straight channel retractable inner ball cage, which has the following beneficial effects:
[0014] 1. The eight-ball straight-channel telescopic inner ball cage has the effect of multi-point force bearing and improved stability through the coordinated arrangement of the bell-shaped shell, the star-shaped sleeve and the steel balls. The eight steel balls arranged between the bell-shaped shell and the star-shaped sleeve are used as transmission points, which is more than the three-point force bearing method of the traditional three transmission wheels. The more force bearing points, the higher the torque transmission frequency is, and the effect of stable transmission is achieved.
[0015] 2. The eight-ball straight channel retractable inner ball cage, the eight arc-shaped straight grooves in the inner cavity of the bell-shaped shell and the eight arc-shaped straight grooves outside the star-shaped sleeve are formed by a one-time die forging process, so that the product does not need to be machined in the later stage. In addition, since the steel balls are standard products, the structure is simple and the production cost is low, so the purchase cost is low. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of a three-dimensional cross-sectional view of the utility model;
[0017] Figure 2 It is a structural schematic diagram of the side view of the utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the bell-shaped housing of the utility model;
[0019] Figure 4 This is a schematic diagram of the structure of the star-shaped sleeve of the utility model;
[0020] Figure 5 It is a structural schematic diagram of the retaining frame of the utility model.
[0021] In the figure: 1, bell-shaped housing; 101, connecting cavity; 102, arc-shaped straight groove in the cavity; 2, star-shaped sleeve; 201, outer arc surface of the sleeve; 202, outer arc-shaped straight groove of the sleeve; 203, spline hole; 3, retaining frame; 301, outer arc surface of the frame; 302, inner arc surface of the frame; 303, limit hole; 4, steel ball. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0023] See also Figures 1 to 5 The utility model provides a technical solution: an eight-ball straight channel telescopic inner ball cage, comprising a bell-shaped shell 1, a star-shaped sleeve 2 and a retaining frame 3, a connecting cavity 101 is provided at the front end of the bell-shaped shell 1, an inner wall of the connecting cavity 101 is provided with an inner arc straight groove 102, an outer side of the star-shaped sleeve 2 is provided with a sleeve outer arc surface 201, a periphery of the sleeve outer arc surface 201 is provided with a sleeve outer arc straight groove 202, a spline hole 203 is provided in the middle of the star-shaped sleeve 2, an outer side of the retaining frame 3 is provided with a frame outer arc surface 301, an inner side of the retaining frame 3 is provided with a frame inner arc surface 302, and a frame inner arc A limiting hole 303 is provided between the surface 302 and the outer arc surface 301 of the frame, the retainer 3 is installed in the connecting cavity 101, the outer diameter of the retainer 3 is smaller than the inner diameter of the connecting cavity 101, and the retainer 3 can be deflected by a certain angle in the connecting cavity 101 through the setting of the outer arc surface 301 of the frame, the star-shaped sleeve 2 is installed inside the retainer 3, and the outer arc surface 201 of the sleeve is concentric with the inner arc surface 302 of the frame, wherein the outer diameter of the outer arc surface 201 of the sleeve is smaller than the inner diameter of the inner arc surface 302 of the frame, so that the star-shaped sleeve 2 can be deflected by a certain angle in the retainer 3, and the arc straight groove 1 in the cavity 02. A steel ball 4 is arranged between the outer arc straight groove 202 and the limiting hole 303. The number of the inner arc straight groove 102, the outer arc straight groove 202 and the limiting hole 303 is eight and evenly distributed in the circumferential direction. The positions of the three correspond to each other and the steel ball 4 is embedded as a torque transmission component so that the bell housing 1, the star-shaped sleeve 2 and the retaining frame 3 must rotate synchronously. The width dimension of the steel ball 4 in the direction of the central axis of the limiting hole 303 is slightly larger than the outer diameter dimension of the steel ball 4, so that the ball 4 can be easily inserted, so that all the steel balls 4 can be restricted on the same plane and cannot be detached outward. The limiting hole 30 3 The width dimension in the tangential direction is greater than the diameter dimension of the steel ball 4. When a swing angle is generated, the steel ball 4 can move left and right in the limiting hole 303. The connecting rod and the spline hole 203 at the rear of the bell housing 1 are used to connect the transmission components of the engine and the transmission components of the front wheels respectively. The inner ball cage is stressed through eight points of the eight-bead straight channel. Due to the large number of stress points, the torque transmission frequency is high, which can improve the stability. The bell housing, the cage, the star sleeve, and the steel ball are all precision-machined after heat treatment. The overall accuracy of the product is improved, thereby improving the durability of the product in later use.
[0024] When in use, first load the star-shaped sleeve 2 from the inside of the retainer 3 and put the ball in. Grease with a higher viscosity can be used to temporarily hold the steel ball 4 in the limiting hole 303, wherein the outer arc surface 201 of the sleeve must be aligned with the steel ball 4. When the star-shaped sleeve 2 is completely inserted into the retainer 3, it is slightly rotated to make the steel ball 4 move again and change its position so that the retainer 3 and the star-shaped sleeve 2 cannot be easily separated through the clamping connection of the steel ball 4. Further, the assembled star-shaped sleeve 2 is aligned with the steel ball 4 and the arc-shaped straight groove 102 in the cavity, and then placed in the connecting cavity 101 and clamped with a retaining spring. Special grease is injected into the connecting cavity of the inner ball cage, and the above-mentioned combined structure is They are aligned in sequence and placed into the inner ball cage connecting cavity. At this time, torque transmission is realized between the clock shell 1 and the star-shaped sleeve 2 through eight steel balls 4 as torque transmission parts. Since the outer sides of the star-shaped sleeve 2 and the retaining frame 3 are provided with arc surfaces and the retaining frame 3 and the connecting cavity 101 are also provided with a gap, the star-shaped sleeve 2 can swing at a small angle inside the connecting cavity 101. During this process, the connecting rod and the spline hole 203 at the rear of the bell shell 1 are used to connect the transmission parts of the engine and the transmission parts of the front wheels respectively. The inner ball cage is stressed through the eight points of the eight-bead straight channel. Due to the large number of stress points, the collision torque transmission is high, thereby improving the stability.
[0025] To sum up, the eight-ball straight-channel retractable inner ball cage uses eight steel balls 4 arranged between the bell-shaped shell 1 and the star-shaped sleeve 2 as transmission, which has more force points than the traditional three-point force transmission method of three transmission wheels. The more force points increase the torque transmission frequency and thus achieve a smooth transmission effect. Since the steel balls 4 used in the transmission are standard parts, it not only has a simple structure but also a mature manufacturing process and a very low purchase cost.
[0026] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope of the utility model can make equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, which should be covered by the protection scope of the utility model.
Claims
1. An eight-ball straight channel telescopic inner ball cage, comprising a bell-shaped housing (1), a star-shaped sleeve (2), a retaining frame (3) and steel balls (4), characterized in that: The bell-shaped housing (1) is provided with a connecting cavity (101) at the front end, an inner wall of the connecting cavity (101) is provided with an inner cavity arc-shaped straight groove (102), an outer sleeve arc surface (201) is provided on the outer side of the star-shaped sleeve (2), an outer sleeve arc-shaped straight groove (202) is provided around the outer sleeve arc surface (201), a spline hole (203) is provided in the middle of the star-shaped sleeve (2), an outer frame arc surface (301) is provided on the outer side of the retaining frame (3), an inner frame arc surface (302) is provided inside the retaining frame (3), a limiting hole (303) is provided between the inner frame arc surface (302) and the outer frame arc surface (301), and a steel ball (4) is provided between the inner cavity arc-shaped straight groove (102), the outer sleeve arc-shaped straight groove (202) and the limiting hole (303).
2. The eight-ball straight channel telescopic inner cage according to claim 1, characterized in that: The number of the arc-shaped straight grooves (102) in the cavity, the arc-shaped straight grooves (202) outside the sleeve and the limiting holes (303) are all eight and are evenly distributed in the circumferential direction. The positions of the three correspond to each other and steel balls (4) are embedded as torque transmission components to ensure that the bell housing (1), the star-shaped sleeve (2) and the retaining frame (3) must rotate synchronously.
3. The eight-ball straight channel telescopic inner cage according to claim 1, characterized in that: The retaining frame (3) is installed in the connecting cavity (101); the outer diameter of the retaining frame (3) is smaller than the inner diameter of the connecting cavity (101); and the retaining frame (3) can be deflected at a certain angle in the connecting cavity (101) by the arrangement of the outer arc surface (301).
4. The eight-ball straight channel telescopic inner cage according to claim 1, characterized in that: The star-shaped sleeve (2) is installed inside the retaining frame (3), and the outer arc surface (201) of the star-shaped sleeve is concentric with the inner arc surface (302) of the retaining frame, wherein the outer diameter of the outer arc surface (201) of the star-shaped sleeve is smaller than the inner diameter of the inner arc surface (302) of the retaining frame, so that the star-shaped sleeve (2) can be deflected by a certain angle inside the retaining frame (3).
5. The eight-ball straight channel telescopic inner cage according to claim 1, characterized in that: The width dimension of the limiting hole (303) in the central axis direction is slightly larger than the outer diameter dimension of the steel ball (4), and can be easily placed in the limiting hole (303), so that all the steel balls (4) are restricted in the limiting hole (303) and can move inside and outside the bell-shaped housing (1). The width dimension of the limiting hole (303) in the tangential direction is larger than the diameter dimension of the steel ball (4), so that when the swing angle rotation motion is generated, the steel ball (4) can move left and right along the tangential direction in the limiting hole (303).
6. The eight-ball straight channel telescopic inner cage according to claim 1, characterized in that: The connecting rod and the spline hole (203) at the rear of the bell housing (1) are used to connect the transmission components of the transmission differential and the transmission components of the front and rear wheels respectively. The inner ball cage is stressed at eight points of the eight-bead straight channel. Due to the large number of stress points, the torque transmission frequency is high, thereby improving the smoothness of vehicle operation.