A kind of distributor and automobile

Abstract

This invention relates to the field of automotive parts technology, specifically to a transfer case and a vehicle. The transfer case includes a main body and a telescopic auxiliary mechanism. The main body is connected to the vehicle's transmission, and one end of the output shaft is connected to the main body. The telescopic auxiliary mechanism includes an inner shell, an outer shell, a cage, and balls. The inner shell is fixed to the outside of the output shaft and has multiple raceways along its circumference. The raceways extend axially along the inner shell, and each raceway contains a ball that can move along the extension direction of the corresponding raceway. The outer shell is located on the outside of the inner shell, and its inner wall surface fits against the outer wall surface of the balls. A cage is also provided between the inner shell and the outer shell to limit the movement of the balls. The transfer case and vehicle provided by this invention, under special road conditions and operating conditions such as powertrain rollover or encountering craters, can effectively improve the reliability and safety of the transfer case and vehicle due to the transfer case's telescopic capability, allowing for changes in relative length.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to a transfer case and an automobile. Background Technology

[0002] As a core component of the transmission system, the transfer case receives power from the gearbox and transmits it to the front and rear drive axles.

[0003] Currently, existing transfer cases have input and output ends. The input end is directly connected to the output end of the transmission, while the output end is connected to the front and rear drive axles respectively. This means that the transfer case is typically connected to surrounding components via flange structures. Therefore, when a vehicle is accelerating or decelerating rapidly, or encountering large, uneven road surfaces such as potholes, relying solely on the extension and retraction function of the output drive shaft is insufficient to meet the demands of these special road conditions. In extreme cases, it may even fail to meet the motion requirements of the entire vehicle's powertrain, potentially leading to the risk of the internal shaft end of the drive shaft mating with the transfer case being pulled off, thus affecting the vehicle's reliability and safety. Summary of the Invention

[0004] (i) The technical problem to be solved by the present invention is that the existing transfer case cannot adapt to the requirements of special road conditions, and may even lead to the risk of the internal shaft head of the drive shaft that cooperates with the transfer case being pulled off under extreme working conditions, thereby affecting the reliability and safety of the vehicle.

[0005] (II) Technical Solution To address the aforementioned technical problems, embodiments of the present invention provide a transfer case, comprising a main body, an output shaft, and a telescopic auxiliary mechanism; The main body is connected to the vehicle's gearbox, and one end of the output shaft is connected to the main body; The telescopic auxiliary mechanism includes an inner shell, an outer shell, a retainer, and a ball. The inner shell is fixed to the outside of the output shaft. The inner shell has multiple raceways along its circumference. The raceways extend along the axial direction of the inner shell. Each raceway contains a ball, and the ball can move along the extension direction of the corresponding raceway. The outer shell is provided on the outside of the inner shell, and the inner wall surface of the outer shell is in contact with the outer wall surface of the ball; The retainer is also provided between the inner shell and the outer shell, and the retainer is used to limit the movement of the rolling ball.

[0006] Furthermore, the cage has multiple limiting grooves along its circumference, and each limiting groove corresponds to one of the rolling balls; The limiting groove extends circumferentially along the outer wall of the cage, and the axis of the limiting groove is perpendicular to the axis of the raceway, allowing the ball to move along the extending direction of the limiting groove.

[0007] Furthermore, a limiting ring is fitted onto the end of the output shaft away from the main body, and the limiting ring is used to limit the inner shell.

[0008] Furthermore, the transfer case also includes a dust cover, which is connected to the end of the housing opposite to the main body, and the dust cover can move synchronously with the housing.

[0009] Furthermore, the transfer case also includes a rubber sleeve having a first end and a second end, the first end being connected to the housing and the second end being connected to the output shaft.

[0010] Furthermore, the outer shell has a flange at one end facing the rubber sheath, and the first end is fixed inside the flange.

[0011] Furthermore, a locking clamp is fitted on the outer side of the second end, which is used to fix the second end and the output shaft.

[0012] Furthermore, the outer wall surface of the output shaft is provided with an external spline, and the inner shell is provided with an internal spline facing the outer wall surface of the output shaft. The external spline and the internal spline cooperate to assemble the inner shell onto the output shaft.

[0013] Furthermore, the outer shell has a plurality of connection holes on the end face away from the main body, and the plurality of connection holes are arranged at intervals along the circumference of the end face.

[0014] Embodiments of the present invention also provide an automobile including the transfer case described above.

[0015] The beneficial effects of this invention are: This invention provides a transfer case comprising a main body and a telescopic auxiliary mechanism. The main body is connected to the vehicle's transmission, and one end of the output shaft is connected to the main body. An inner shell is fixed to the outer side of the output shaft, and an outer shell is provided on the outer side of the inner shell. A rolling space is formed between the outer shell and the inner shell. The inner shell has multiple raceways extending axially along its circumference, and each raceway contains a ball. The outer wall of the ball is also in contact with the inner wall of the outer shell. Under special road conditions and working conditions such as the vehicle's powertrain flipping or encountering craters, the outer shell is displaced by the bumps, which in turn causes the ball to move along the extension direction of the corresponding raceway, thereby achieving a change in relative length. This gives the transfer case a certain telescopic performance. At the same time, a retainer limits the ball, ensuring that the ball only rolls within the rolling space and preventing the ball from detaching. This effectively improves the reliability and safety of the transfer case.

[0016] The present invention provides an automobile including the above-mentioned transfer case. By using the above-mentioned transfer case, the problem of poor adaptability to changes in transfer case length is effectively solved, and the off-road performance of the automobile is significantly improved. In special road conditions and working conditions such as powertrain rollover or encountering potholes, the automobile can easily cope with them, and the reliability and safety of the automobile are significantly improved. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the external structure of the transfer case provided in an embodiment of the present invention; Figure 2 This is a partial structural cross-sectional view of the transfer case provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the mounting end face structure of the transfer case provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the inner shell and ball structure of the transfer case provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the cage structure of the transfer case provided in an embodiment of the present invention.

[0019] icon: 100 - Main body; 101 - Output shaft; 200-Telescopic auxiliary mechanism; 201-Inner shell; 2011-Range; 202-Outer shell; 2021-Flanged edge; 2022-Connecting hole; 203-Cage; 2031-Limit groove; 204-Ball; 205-Limit retaining ring; 206-Dust cover; 207-Rubber sheath; 208-Locking clamp. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0023] Example 1 like Figures 1 to 5 As shown, the present invention provides a transfer case, including a main body 100, an output shaft 101, and a telescopic auxiliary mechanism 200; The main body 100 is connected to the car's gearbox, and one end of the output shaft 101 is connected to the main body 100; The telescopic auxiliary mechanism 200 includes an inner shell 201, an outer shell 202, a retainer 203, and a ball 204. The inner shell 201 is fixed to the outside of the output shaft 101. The inner shell 201 has multiple raceways 2011 along its circumference. The raceways 2011 extend along the axial direction of the inner shell 201. Each raceway 2011 contains a ball 204. The ball 204 can move along the extension direction of the corresponding raceway 2011. An outer shell 202 is provided on the outside of the inner shell 201, and the inner wall surface of the outer shell 202 is in contact with the outer wall surface of the rolling ball 204; A retainer 203 is also provided between the inner shell 201 and the outer shell 202, which is used to limit the movement of the ball 204.

[0024] In this embodiment, the transfer case includes a main body 100 and a telescopic auxiliary mechanism 200. The main body 100 is connected to the vehicle's transmission. One end of the output shaft 101 is connected to the main body 100. An inner shell 201 is fixed to the outer side of the output shaft 101, and an outer shell 202 is provided on the outer side of the inner shell 201. A rolling space is formed between the outer shell 202 and the inner shell 201. Figure 4As shown, the inner shell 201 has multiple raceways 2011 extending axially along its circumference. Each raceway 2011 contains a ball 204, and the outer wall of the ball 204 is in contact with the inner wall of the outer shell 202. Under special road conditions and working conditions such as the vehicle powertrain flipping over or encountering craters, the outer shell 202 is displaced by bumps, which in turn causes the ball 204 to move along the extension direction of the corresponding raceway 2011 to achieve a change in relative length, giving the transfer case a certain telescopic performance. At the same time, the retainer 203 limits the ball 204, ensuring that the ball 204 only rolls within the rolling space, preventing the ball 204 from detaching, which can effectively improve the reliability and safety of the transfer case.

[0025] According to one embodiment provided by the present invention, such as Figure 1 and Figure 5 As shown, the cage 203 has multiple limiting grooves 2031 along its circumference, and the limiting grooves 2031 correspond one-to-one with the rolling balls 204; The limiting groove 2031 extends circumferentially along the outer wall surface of the retainer 203, and the axis of the limiting groove 2031 is perpendicular to the axis of the raceway 2011, so that the ball 204 can move along the extending direction of the limiting groove 2031.

[0026] In this embodiment, the retainer 203 is sleeved on the outside of the inner shell 201, located between the inner shell 201 and the outer shell 202. The retainer 203 restricts the movement of the ball 204 to only within the rolling space. At the same time, multiple limiting grooves 2031 are provided on the retainer 203 along the circumference of the outer wall. Each limiting groove 2031 is relatively independent and corresponds to one ball 204. The axis of the limiting groove 2031 is perpendicular to the axis of the raceway 2011. The limiting grooves 2031 restrict the movement of the ball 204 in the rolling space in four directions: front, back, left, and right. This allows the transfer case to have both length extension and a certain swing function to achieve angle changes and adapt to the swing requirements of angle changes.

[0027] Preferably, there are six balls 204, six raceways 2011 and six limiting grooves 2031, and they are evenly spaced along the circumference of the output shaft 101. That is, a set of corresponding balls 204, raceways 2011 and limiting grooves 2031 is provided every sixty degrees, so as to ensure the stability of adjustment.

[0028] Of course, the number of rolling balls 204, raceways 2011 and limiting grooves 2031 can be eight, ten or more, and they can be evenly spaced along the circumference of the output shaft 101. Their purpose has not deviated from the design concept of this invention and should fall within the protection scope of this invention.

[0029] According to one embodiment provided by the present invention, such as Figure 2 As shown, a limiting ring 205 is fitted on the end of the output shaft 101 that is away from the main body 100. The limiting ring 205 is used to limit the inner shell 201.

[0030] In this embodiment, the ball 204 rolls within the rolling space enclosed by the inner shell 201 and the outer shell 202. Simultaneously, the raceway 2011 on the inner shell 201 and the limiting groove 2031 on the retainer 203 cooperate to restrict the movement path of the ball 204. Therefore, it is necessary to fix the inner shell 201 relative to the output shaft 101, and also to prevent the inner shell 201 from detaching from the output shaft 101 as the outer shell 202 extends, contracts, and swings. Therefore, a limiting ring 205 is fitted onto the end of the output shaft 101 facing away from the main body 100. The limiting ring 205 limits the inner shell 201, ensuring that the rolling path of the ball 204 is relatively stable, thus meeting the requirements for length extension and angle swing changes.

[0031] According to one embodiment provided by the present invention, such as Figure 1 , Figure 2 and Figure 3 As shown, the transfer case also includes a dust cover 206, which is connected to the end of the housing 202 away from the main body 100. The dust cover 206 can move synchronously with the housing 202.

[0032] In this embodiment, a dust cover 206 is provided at one end of the outer shell 202 away from the main body 100. The dust cover 206 is tightly fitted to the edge of the end of the outer shell 202 in a circumferential manner, thereby sealing and protecting the various components inside the outer shell 202. Correspondingly, since the dust cover 206 is tightly connected to the outer shell 202, the dust cover 206 can move synchronously with the outer shell 202.

[0033] According to one embodiment provided by the present invention, such as Figure 2 As shown, the transfer case also includes a rubber sleeve 207, which has a first end and a second end. The first end is connected to the housing 202, and the second end is connected to the output shaft 101.

[0034] In this embodiment, in order to cooperate with the dust cover 206 for sealing, a rubber sleeve 207 is provided at the end of the outer shell 202 opposite to the dust cover 206. The first end of the rubber sleeve 207 is tightly connected to the outer shell 202, and the second end is tightly connected to the output shaft 101. Therefore, when the outer shell 202 needs to be stretched or oscillated, the rubber sleeve 207 can cooperate with the dust cover 206 to ensure that the internal components are sealed and protected.

[0035] Among them, because the rubber sheath 207 has a certain degree of elasticity, it can adapt to deformation and return to its original shape when it needs to be stretched or swung.

[0036] According to one embodiment provided by the present invention, such as Figure 2 As shown, the outer shell 202 has a flange 2021 at one end facing the rubber sheath 207, and the first end is fixed inside the flange 2021.

[0037] In this embodiment, in order to ensure that the first end of the rubber sleeve 207 can be tightly connected with the outer shell 202, a flange 2021 is formed at the end of the outer shell 202. By fixing the first end inside the flange 2021, the flange 2021 limits the rubber sleeve 207 to ensure the stability of the sealing effect.

[0038] Optionally, a gap is reserved inside the flange 2021 to facilitate the placement of the rubber sleeve 207 within the gap. The flange 2021 itself clamps the rubber sleeve 207 in place, thereby preventing it from coming off during use and affecting the sealing effect.

[0039] According to one embodiment provided by the present invention, such as Figure 2 As shown, a locking clamp 208 is fitted on the outer side of the second end, which is used to fix the second end and the output shaft 101.

[0040] In this embodiment, the first end of the rubber sleeve 207 is limited by the flange 2021. Therefore, a locking clamp 208 is provided on the outer side of the second end of the rubber sleeve 207. The locking clamp 208 fixes the second end of the rubber sleeve 207 to the output shaft 101. Since the locking clamp 208 fixes the second end to the output shaft 101, it can effectively prevent the rubber sleeve 207 from displacing during the stretching and swinging of the outer shell 202, thus ensuring the sealing effect of the rubber sleeve 207.

[0041] Optionally, the locking clamp 208 includes a first clamp plate and a second clamp plate. One end of the first clamp plate is hinged to one end of the second clamp plate, and the other end of the first clamp plate is engaged with the other end of the second clamp plate. This allows the locking clamp 208 to fix the rubber sleeve 207 to the output shaft 101 after the second end is tightly fitted to the output shaft 101.

[0042] According to one embodiment provided by the present invention, such as Figure 2 As shown, the outer wall surface of the output shaft 101 is provided with an external spline, and the inner shell 201 is provided with an internal spline facing the outer wall surface of the output shaft 101. The external spline and the internal spline cooperate to assemble the inner shell 201 onto the output shaft 101.

[0043] In this embodiment, the inner shell 201 is fixed to the outside of the output shaft 101, and the inner shell 201 and the output shaft 101 are relatively fixed. The outer wall surface of the output shaft 101 is provided with an external spline, and the inner shell 201 is provided with an internal spline facing the outer wall surface of the output shaft 101. The inner shell 201 and the output shaft 101 are relatively fixed by the spline combination of the external spline and the internal spline. The relative cooperation of the external spline and the internal spline can have good centering and high concentricity, thereby significantly improving the accuracy of the stretching and swinging of the outer shell 202.

[0044] Of course, the relative fit between the external and internal splines also provides better reliability and less stress concentration. During the rolling of the ball 204, it can reduce the impact intensity on the output shaft 101, thereby improving the overall service life.

[0045] According to one embodiment provided by the present invention, such as Figure 2 and Figure 3 As shown, the outer shell 202 has multiple connecting holes 2022 on the end face away from the main body 100, and the multiple connecting holes 2022 are arranged at intervals along the circumference of the end face.

[0046] In this embodiment, a plurality of connection holes 2022 are provided on the end face of the outer shell 202 away from the main body 100. Preferably, there are six connection holes 2022, and the six connection holes 2022 are arranged at intervals along the circumferential direction of the outer shell 202, thereby ensuring that they can be connected to the corresponding peripheral parts.

[0047] Example 2 The present invention provides an automobile including the transfer case described above.

[0048] In this embodiment, the vehicle includes the aforementioned transfer case. By using the aforementioned transfer case, the problem of poor adaptability to changes in transfer case length is effectively solved, significantly improving the vehicle's off-road performance. It can easily cope with special road conditions and working conditions such as the vehicle's powertrain flipping over or encountering potholes, significantly improving the vehicle's reliability and safety.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A transfer case, characterized in that, It includes a main body (100), an output shaft (101), and a telescopic auxiliary mechanism (200). The main body (100) is connected to the gearbox of the automobile, and one end of the output shaft (101) is connected to the main body (100); The telescopic auxiliary mechanism (200) includes an inner shell (201), an outer shell (202), a retainer (203), and a ball (204). The inner shell (201) is fixed to the outside of the output shaft (101). The inner shell (201) has multiple raceways (2011) along its circumference. The raceways (2011) extend along the axial direction of the inner shell (201). Each raceway (2011) contains a ball (204). The ball (204) can move along the extension direction of the corresponding raceway (2011). The outer shell (202) is provided on the outside of the inner shell (201), and the inner wall surface of the outer shell (202) is in contact with the outer wall surface of the ball (204); The retainer (203) is also provided between the inner shell (201) and the outer shell (202), and the retainer (203) is used to limit the movement of the ball (204); The retainer (203) has a plurality of limiting grooves (2031) along its circumference, and the limiting grooves (2031) correspond one-to-one with the rolling balls (204); The limiting groove (2031) extends circumferentially along the outer wall surface of the retainer (203), and the axis of the limiting groove (2031) is perpendicular to the axis of the raceway (2011). The ball (204) can move along the extending direction of the limiting groove (2031). The limiting groove (2031) restricts the rolling ball (204) from moving in four directions (front, back, left, and right) within the rolling space formed between the outer shell (202) and the inner shell (201).

2. The transfer case according to claim 1, characterized in that, A limiting ring (205) is fitted on one end of the output shaft (101) away from the main body (100), and the limiting ring (205) is used to limit the inner shell (201).

3. The transfer case according to claim 1, characterized in that, The transfer case also includes a dust cover (206), which is connected to the end of the outer shell (202) away from the main body (100) and can move synchronously with the outer shell (202).

4. The transfer case according to claim 3, characterized in that, The transfer case also includes a rubber sleeve (207) having a first end and a second end, the first end being connected to the housing (202) and the second end being connected to the output shaft (101).

5. The transfer case according to claim 4, characterized in that, The outer shell (202) has a flange (2021) at one end facing the rubber sheath (207), and the first end is fixed inside the flange.

6. The transfer case according to claim 4, characterized in that, A locking clamp (208) is fitted on the outer side of the second end, and the locking clamp (208) is used to fix the second end and the output shaft (101).

7. The transfer case according to claim 1, characterized in that, The outer wall surface of the output shaft (101) is provided with an external spline, and the outer wall surface of the inner shell (201) facing the output shaft (101) is provided with an internal spline. The external spline and the internal spline cooperate to assemble the inner shell (201) onto the output shaft (101).

8. The transfer case according to any one of claims 1-7, characterized in that, The outer shell (202) has a plurality of connection holes (2022) on the end face away from the main body (100), and the plurality of connection holes (2022) are arranged at intervals along the circumference of the end face.

9. A car, characterized in that, Includes the transfer case as described in any one of claims 1-8.

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