Transmission positioning support ring, mandrel and inner transmission

Abstract

The utility model relates to the technical field of inner transmissions, and discloses a transmission positioning support ring, which comprises a support ring sleeved outside a mandrel, a fixed positioning lug for preventing the support ring from moving relative to the axial direction is arranged on the inner wall of the support ring, and a positioning boss for preventing the support ring from rotating in the radial direction is further arranged on the inner wall of the support ring; the positioning protruding blocks are embedded in the radial grooves in the central spindle. And the positioning boss is positioned in an axial groove on the mandrel. The support ring can be fixed on the mandrel, the structure and the assembly mode are simple, the sun gear can stably rotate after being sleeved on the support ring, and the problems that the support ring of the traditional clutch is easy to rotate and deviate, the stability is poor, friction collision is generated among the sun gear, the pawl and the planetary gear, the speed change process is not smooth, and the service life is short are solved. The utility model further discloses a mandrel comprising the transmission positioning and supporting ring and an inner transmission.

Description

Technical Field

[0001] The utility model relates to the technical field of internal transmissions, in particular to a transmission positioning support ring, a mandrel and an internal transmission. Background Art

[0002] In order to isolate the sun gear from the mandrel in a traditional internal transmission, a support ring for supporting the sun gear is provided. However, such a support ring is prone to rotational offset and poor stability, resulting in friction and collision between the sun gear, the pawl and the planetary gear, an unsmooth speed change process, and a short service life.

[0003] Therefore, it is necessary to propose a new type of transmission positioning support ring, mandrel and internal transmission to solve the problems of the traditional clutch, such as the easy rotational offset of its support ring, poor stability, friction and collision between the sun gear, the pawl and the planetary gear, an unsmooth speed change process, and a short service life. Summary of the Invention

[0004] The utility model provides a transmission positioning support ring, a mandrel and an internal transmission to solve the problems of the traditional clutch, such as the easy rotational offset of its support ring, poor stability, friction and collision between the sun gear, the pawl and the planetary gear, an unsmooth speed change process, and a short service life.

[0005] The technical problems solved by the utility model are realized by the following technical solutions:

[0006] A transmission positioning support ring includes a support ring sleeved outside a mandrel. The inner wall of the support ring is provided with fixed positioning protrusions for preventing the support ring from axially moving, and the inner wall of the support ring is also provided with a positioning boss for preventing the support ring from radially rotating; the positioning protrusions are embedded in radial grooves on the mandrel; the positioning boss is located in an axial groove on the mandrel.

[0007] Further, it further includes an elastic member. The elastic member is arranged in the axial groove and is used to prevent the positioning protrusion from rotating out of the radial groove.

[0008] Further, the positioning protrusion includes a first positioning protrusion, and the first positioning protrusion is fixedly connected to the positioning boss.

[0009] Further, the positioning protrusion further includes a second positioning protrusion, and a gap is left between the first positioning protrusion and the second positioning protrusion, and the gap allows the elastic member to pass through.

[0010] Further, the elastic member is provided with a pin extending into the radial groove.

[0011] Further, the pin extends into an adjacent radial groove of the radial groove where the positioning protrusion is located.

[0012] Further, relief grooves for avoiding the engaging pawls are provided on both sides of the support ring.

[0013] A mandrel includes a mandrel and the above-mentioned transmission positioning support ring.

[0014] Further, the mandrel includes a radial groove and an axial groove. The radial groove extends along the radial direction of the mandrel on the surface of the mandrel, and the axial groove extends along the axial direction of the mandrel on the surface of the mandrel.

[0015] An internal transmission includes the above-mentioned transmission positioning support ring.

[0016] The beneficial effects of the present utility model are as follows:

[0017] In the present utility model, a fixed positioning protrusion for preventing the support ring from axially moving is provided on the inner wall of the support ring, and a positioning boss for preventing the support ring from radially rotating is also provided on the inner wall of the support ring. The positioning protrusion is embedded in the radial groove on the mandrel, and the positioning boss is located in the axial groove on the mandrel, thereby fixing the support ring on the mandrel. The structure and assembly method are simple. After the sun gear is sleeved on the support ring, it can rotate stably, solving the problems of the traditional clutch that the support ring is prone to rotational offset, poor stability, friction and collision between the sun gear and the engaging pawls and the planetary gears, unsmooth speed change process, and short service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a three-dimensional view of the internal transmission of the present utility model.

[0020] Figure 2 It is a cross-sectional view of the internal transmission of the present utility model.

[0021] Figure 3 It is a combined structural schematic diagram of the support ring, elastic member, and mandrel of the present utility model.

[0022] Figure 4 It is an exploded view of the support ring, elastic member, and mandrel of the present utility model.

[0023] Figure 5 It is a combined structural schematic diagram of the support ring, elastic member, and mandrel of the present utility model from another perspective.

[0024] Figure 6Schematic diagram of the combined structure of the support ring, elastic member, mandrel, pawl, and pawl control ring of the present utility model.

[0025] Figure 7 Schematic diagram of the structure of the support ring of the present utility model.

[0026] Figure 8 Schematic diagram of the structure of the elastic member of the present utility model.

[0027] Wherein:

[0028] 1 - Support ring, 100 - Mandrel, 110 - Relief groove, 120 - Radial groove, 130 - Axial groove;

[0029] 2 - Positioning bump, 21 - First positioning bump, 22 - Second positioning bump;

[0030] 3 - Positioning boss;

[0031] 4 - Elastic member, 41 - Plug pin;

[0032] 5 - Pawl control ring, 500 - Shifting assembly, 510 - Pawl, 520 - Sun gear, 530 - Planet gear, 540 - Input member, 550 - Planet carrier, 560 - Clutch, 570 - Internal gear ring, 580 - Output member. Detailed implementation manners

[0033] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below with reference to specific illustrations.

[0034] Refer to Figures 1 to 8 , a transmission positioning support ring, including a support ring 1 sleeved outside a mandrel 100. The inner wall of the support ring 1 is provided with a fixed positioning bump 2 to prevent the support ring 1 from axially moving, and the inner wall of the support ring 1 is also provided with a positioning boss 3 to prevent the support ring 1 from radially rotating; the positioning bump 2 is embedded in the radial groove 120 on the mandrel 100; the positioning boss 3 is located in the axial groove 130 on the mandrel 100, and the support ring 1 is thus fixed on the mandrel 100. The structure and assembly method are simple. After the sun gear 520 is sleeved on the support ring 1, it can rotate stably, solving the problems of the traditional clutch that its support ring is prone to rotation and offset, poor stability, friction and collision between the sun gear and the pawl and planet gears, unsmooth shifting process, and short service life.

[0035] Specifically, when in use, the shift component 500 is manipulated to drive the pawl control ring 5 to open and close the pawl 510 on the mandrel 100. When the pawl 510 is retracted, the sun gear 520 and the planetary gear 530 rotate freely. The support ring 1 supports the sun gear 520, and the sun gear 520 rotates smoothly at a stable position. After the input member 540 inputs torque, it first passes through the planet carrier 550. The rotational speed of the planet carrier 550 is higher than that of the internal gear ring 570. Then the clutch 560 engages to synchronize the rotational speeds of the planet carrier 550 and the internal gear ring 570. The torque of the planet carrier 550 is transmitted to the internal gear ring 570, and is output to the wheel through the output member 580 by the internal gear ring 570. At this time, the internal transmission does not shift through the planetary gear mechanism.

[0036] When the pawl 510 is open, it is in other gears, and one of the sun gears 520 is locked. After the input member 540 inputs torque, it first passes through the planet carrier 550. The rotation of the planet carrier 550 drives the planetary gear 530 to rotate. One of the sun gears 520 meshes with the planetary gear 530. The support ring 1 supports the sun gear 520, and the sun gear 520 rotates smoothly at a stable position. The combination and transmission between the sun gear 520, the pawl 510 and the planetary gear 530 are smoother, making the rotational speed of the internal gear ring 570 higher than that of the planet carrier 550. At this time, the clutch 560 is disengaged, and the torque of the internal gear ring 570 is output to the wheel through the output member 580. At this time, the internal transmission shifts through the planetary gear mechanism.

[0037] It further includes an elastic member 4. The elastic member 4 is arranged in the axial groove 130 and is used to prevent the positioning convex block 2 from rotating out of the radial groove 120. The elastic member 4 can apply pressure to the positioning boss 2 and the inner wall of the axial groove 130 far from the positioning boss 2, so that the positioning boss 2 is pressed against the inner wall of the axial groove 130, further preventing the positioning convex block 2 from rotating out of the radial groove 120, thereby further fixing the position of the support ring 1; at the same time, the support ring 1 and the inner wall of the axial groove 130 jointly define the position of the elastic member 4 to prevent the radial rotation of the elastic member 4.

[0038] The positioning convex block 2 includes a first positioning convex block 21, and the first positioning convex block 21 is fixedly connected to the positioning boss 3. This can ensure that the first positioning convex block 21 is embedded in the radial groove 120 close to the positioning boss 3.

[0039] The positioning convex block 2 further includes a second positioning convex block 22. A gap is left between the first positioning convex block 21 and the second positioning convex block 22, and the gap allows the elastic member 4 to pass through. This can ensure that the radial grooves 120 on both sides of the axial groove 130 are respectively embedded with the first positioning convex block 21 and the second positioning convex block 22.

[0040] Preferably, the seat of the radial groove where the second positioning convex block is located can pass through the gap, which is convenient for installing the support ring 1 on the mandrel 100.

[0041] The elastic member 4 is provided with a pin 41 extending into the radial groove. This can prevent the axial movement of the elastic member 4, further avoid the positioning bump 2 from rotating and exiting from the radial groove 120, thereby further fixing the position of the support ring 1.

[0042] The pin 41 extends into an adjacent radial groove 120 of the radial groove where the positioning bump 2 is located. This can provide a fitting space for the positioning bump 2 to be fitted into the radial groove 120 and facilitate the installation of the elastic member.

[0043] The support ring 1 is provided with a relief groove 110 for avoiding the pawl 510 on both sides. This can provide a support space for the sun gear 520 by the support ring 1 while providing a movement space for the pawl 510, reducing the axial space of the internal transmission, and the seat of the radial groove 120 can also support the support ring 1.

[0044] A mandrel includes a mandrel 100 and the above-mentioned transmission positioning support ring.

[0045] The mandrel 100 includes a radial groove 120 and an axial groove 130. The radial groove 120 extends along the radial direction of the mandrel 100 on the surface of the mandrel 100, and the axial groove 130 extends along the axial direction of the mandrel 100 on the surface of the mandrel 100.

[0046] An internal transmission includes the above-mentioned transmission positioning support ring.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A transmission positioning support ring, characterized in that: It includes a support ring (1) sleeved outside a mandrel (100). On the inner wall of the support ring (1), there are fixed positioning bumps (2) to prevent the support ring (1) from moving axially, and a positioning boss (3) to prevent the support ring (1) from rotating radially. The positioning bump (2) is embedded in a radial groove (120) on the mandrel (100). The positioning boss (3) is located in an axial groove (130) on the mandrel (100).

2. The transmission positioning support ring according to claim 1, characterized in that: It further includes an elastic member (4). The elastic member (4) is arranged in the axial groove (130) and is used to prevent the positioning bump (2) from exiting the radial groove (120) by rotation.

3. The transmission positioning support ring according to claim 2, wherein: The positioning bump (2) includes a first positioning bump (21), and the first positioning bump (21) is fixedly connected to the positioning boss (3).

4. The transmission positioning support ring according to claim 3, wherein: The positioning bump (2) further includes a second positioning bump (22). There is a gap between the first positioning bump (21) and the second positioning bump (22), and the gap allows the elastic member (4) to pass through.

5. The transmission positioning support ring according to claim 2, wherein: The elastic member (4) is provided with a pin (41) extending into the radial groove.

6. The transmission positioning support ring according to claim 5, wherein: The pin (41) extends into an adjacent radial groove (120) of the radial groove where the positioning bump (2) is located.

7. The transmission positioning support ring according to any one of claims 1 to 6, characterized in that: On both sides of the support ring (1), there are relief grooves (110) for avoiding ratchet claws (510).

8. A mandrel, characterized in that: It includes a mandrel (100) and the transmission positioning support ring according to any one of claims 1 to 7.

9. The mandrel according to claim 8, wherein: The mandrel (100) includes a radial groove (120) and an axial groove (130). The radial groove (120) extends radially along the surface of the mandrel (100), and the axial groove (130) extends axially along the surface of the mandrel (100).

10. An internal transmission, characterized in that: It includes the transmission positioning support ring according to any one of claims 1 to 7.

Images