Pawl control ring, gear shifting mechanism and internal transmission

Abstract

The utility model relates to the technical field of internal transmissions, and discloses a pawl control ring which comprises a connecting rod and a control portion located on the connecting rod, the control portion is provided with an open groove used for controlling opening and closing of a pawl, the control portion rotates along with rotation of the connecting rod around a mandrel, and the connecting rod comprises a connecting rod front section and a connecting rod rear section. The distance between the connecting rod rear section and the center line of the rotating shaft is smaller than that between the connecting rod front section and the center line of the rotating shaft. The connecting rod is divided into the connecting rod front section and the connecting rod rear section, the distance between the connecting rod rear section and the center line of the rotating shaft is smaller than that between the connecting rod front section and the center line of the rotating shaft, space is vacated for the sun gear at the tail end, especially the smallest sun gear, and therefore miniaturization of the sun gears is achieved. The corresponding planetary gear space and the gear shifting stage number are relatively increased, the radial space occupied by the whole inner transmission is reduced, and the requirement for more miniaturization and multi-stage speed change is met. The utility model further discloses a gear shifting mechanism and an internal transmission.

Description

Technical Field

[0001] The utility model relates to the technical field of internal transmissions, in particular to a pawl control ring, a shifting mechanism and an internal transmission. Background Technique

[0002] Inside the internal transmission, a pawl control ring is required to control the opening and closing of the pawl, lock different sun gears, and switch different gears to achieve speed change. The pawl control ring usually consists of a connecting rod and a control part arranged on the connecting rod. The shifting component is manipulated to drive the connecting rod to rotate around the core shaft, and the control part also rotates accordingly. The opening slot on the control part controls the opening and closing of the pawl.

[0003] However, in the traditional pawl control ring, the whole connecting rod is straight. Each sun gear has to wrap the core shaft, the connecting rod and the pawl at the same time, making it impossible to miniaturize the sun gear, especially the smallest sun gear. The corresponding space of the planetary gear is limited, and the number of gear shifting levels is also limited. The whole internal transmission occupies a large radial space and cannot meet the requirements of more miniaturized and multi-stage speed change.

[0004] Therefore, it is necessary to propose a new type of pawl control ring, shifting mechanism and internal transmission to solve the problems caused by the straight whole connecting rod of the traditional pawl control ring, such as the inability to miniaturize the sun gear, especially the smallest sun gear, the limited space of the corresponding planetary gear, the limited number of gear shifting levels, the large radial space occupied by the whole internal transmission, and the inability to meet the requirements of more miniaturized and multi-stage speed change. Summary of the Invention

[0005] The utility model provides a pawl control ring, a shifting mechanism and an internal transmission to solve the problems caused by the straight whole connecting rod of the traditional pawl control ring, such as the inability to miniaturize the sun gear, especially the smallest sun gear, the limited space of the corresponding planetary gear, the limited number of gear shifting levels, the large radial space occupied by the whole internal transmission, and the inability to meet the requirements of more miniaturized and multi-stage speed change.

[0006] The technical problems solved by the utility model are realized by the following technical solutions:

[0007] A pawl control ring includes a connecting rod and a control part located on the connecting rod. The control part is provided with an opening slot for controlling the opening and closing of the pawl. The control part rotates as the connecting rod rotates around the core shaft. The connecting rod includes a front section of the connecting rod and a rear section of the connecting rod. The distance between the rear section of the connecting rod and the center line of the rotating shaft is less than the distance between the front section of the connecting rod and the center line of the rotating shaft.

[0008] Furthermore, the control part includes a front control part and a rear control part. The front control part is arranged on the front section of the connecting rod, and the rear control part is arranged on the rear section of the connecting rod.

[0009] Further, the rear control part is arranged at the end of the rear section of the connecting rod.

[0010] Further, the connecting rod is in contact with the core shaft.

[0011] Further, a concave first step is provided on the outer side of the connection between the rear section and the front section of the connecting rod for avoiding the smallest sun gear.

[0012] Further, a concave second step is provided on the outer side of the connection between the rear section and the front section of the connecting rod, and the distance between the second step and the center line of the rotating shaft is greater than the distance between the first step and the center line of the rotating shaft.

[0013] Further, a retracted part extending towards the core shaft is provided on the inner side of the connection between the rear section and the front section of the connecting rod, so that the rear section of the connecting rod extends along the axial direction from the retracted part.

[0014] Further, the front section and the rear section of the connecting rod are parallel.

[0015] A shifting mechanism includes a pawl and a core shaft. A pawl seat for accommodating the pawl is provided on the core shaft, and the above-mentioned pawl control ring is further included.

[0016] An internal transmission further includes the above-mentioned pawl control ring.

[0017] The beneficial effects of the present utility model are as follows:

[0018] By dividing the connecting rod into a front section and a rear section, and setting the rear section of the connecting rod to have a distance from the center line of the rotating shaft smaller than that of the front section of the connecting rod, space is vacated for the sun gear at the outermost end, especially the smallest sun gear, thereby realizing the miniaturization of the sun gear. Correspondingly, the space of the planetary gear and the number of gear shifting levels are relatively increased, and the radial space occupied by the entire internal transmission becomes smaller, meeting the requirements of more miniaturized and multi-stage speed change. Description of the Drawings

[0019] 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 the description of the embodiments or the prior art. Obviously, the drawings in the following description 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.

[0020] Figure 1 It is a three-dimensional view of the internal transmission of the present utility model.

[0021] Figure 2 It is a cross-sectional view of the internal transmission of the present utility model.

[0022] Figure 3 For Figure 2Enlarged view of part A

[0023] Figure 4 Is a three - dimensional view of the shift mechanism of the present utility model

[0024] Figure 5 Is an exploded view of the shift mechanism of the present utility model

[0025] Figure 6 Is a three - dimensional view of the pawl control ring of the present utility model

[0026] Figure 7 Is a side view of the pawl control ring of the present utility model

[0027] Wherein:

[0028] Link 1, front section of the link 11, rear section of the link 12, first step 13, second step 14, retracted portion 15, connecting portion 16;

[0029] Control portion 2, opening slot 20, front control portion 21, rear control portion 22;

[0030] Pawl 3;

[0031] Spindle 4, pawl seat 40;

[0032] 100 - sun gear, 200 - shift component, 300 - planetary gear, 400 - input component, 500 - planet carrier, 600 - clutch, 700 - internal gear ring, 800 - output component. Detailed implementation mode

[0033] In order to make the technical means, creative features, achieved purposes and effects realized by 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 7 , a pawl control ring, comprising a link 1 and a control portion 2 located on the link 1, the control portion 2 is provided with an opening slot 20 for controlling the opening and closing of the pawl 3, the control portion 2 rotates as the link 1 rotates around the spindle 4, the link 1 includes a front section of the link 11 and a rear section of the link 12, and the distance of the rear section of the link 12 from the center line of the rotating shaft is less than the distance of the front section of the link 11 from the center line of the rotating shaft. By dividing the link 1 into the front section of the link 11 and the rear section of the link 12, and setting the rear section of the link 12 to have a distance from the center line of the rotating shaft less than that of the front section of the link 11, space is vacated for the sun gear 100 at the outermost end, especially the smallest sun gear, thereby realizing the miniaturization of the sun gear 100. Correspondingly, the space of the planetary gear 300 and the number of gear shift levels are relatively increased, and the radial space occupied by the entire internal transmission becomes smaller, meeting the requirements of more miniaturized and multi - stage speed change.

[0035] Specifically, during use, the shift component 200 is connected to the connecting portion 16 on the pawl control ring. By operating the shift component 200, the connecting rod 1 of the pawl control ring is driven, and the control portion 2 rotates as the connecting rod 1 rotates around the core shaft 4, and the opening slot 20 controls the opening and closing of the pawl 3 on the core shaft 4. The distance from the rear section 12 of the connecting rod to the center line of the rotating shaft is less than the distance from the front section 11 of the connecting rod to the center line of the rotating shaft. The control portion 2 on the rear section 12 of the connecting rod is very close to the center line of the rotating shaft, and the sun gear 100 here can be set smaller. Moreover, the radial distance difference between the front section 11 and the rear section 12 of the connecting rod forms a force arm, and it is more labor-saving to control the pawl 3 at the rear section 12 of the connecting rod. When the pawl 3 is retracted, the sun gear 100 and the planetary gear 300 rotate freely. After the input member 400 inputs torque, it first passes through the planet carrier 500. The rotational speed of the planet carrier 500 is higher than that of the internal gear ring 700. Then the clutch 600 engages, synchronizing the rotational speeds of the planet carrier 500 and the internal gear ring 700. The torque of the planet carrier 500 is transmitted to the internal gear ring 700, and is output to the wheel through the output member 800 by the internal gear ring 700. At this time, the internal transmission does not shift through the planetary gear mechanism.

[0036] When the pawl control ring controls the pawl 3 to open, the sun gear 100 is locked. After the input member 400 inputs torque, it first passes through the planet carrier 500. The rotation of the planet carrier 500 drives the planetary gear 300 to rotate. The sun gear 100 meshes with the planetary gear 300, making the rotational speed of the internal gear ring 700 higher than that of the planet carrier 500. At this time, the clutch 600 disengages, and the torque of the internal gear ring 700 is output to the wheel through the output member 800. At this time, the internal transmission shifts through the planetary gear mechanism.

[0037] The control portion 2 includes a front control portion 21 and a rear control portion 22. The front control portion 21 is provided on the front section 11 of the connecting rod, and the rear control portion 22 is provided on the rear section 12 of the connecting rod. By arranging different control portions in the front and rear, the sun gear 100 of different sizes can be flexibly set, and more shift levels can be set.

[0038] The rear control portion 22 is provided at the end of the rear section 12 of the connecting rod. In this way, the control of the smallest sun gear 100 can be achieved at the end of the connecting rod 1, making full use of the connecting rod 1.

[0039] The connecting rod 1 is in contact with the core shaft 4. This can ensure a smaller radial occupied space.

[0040] On the outer side of the connection between the rear section 12 and the front section 11 of the connecting rod, there is a concave first step 13 for avoiding the smallest sun gear 100. This can make the connecting rod 1 occupy a smaller space and further ensure a smaller radial occupied space.

[0041] On the outer side of the connection between the rear section 12 of the connecting rod and the front section 11 of the connecting rod, there is a recessed second step 14, and the distance from the second step 14 to the center line of the rotating shaft is greater than the distance from the first step 13 to the center line of the rotating shaft. This can avoid more sun gears 100.

[0042] On the inner side of the connection between the rear section 12 of the connecting rod and the front section 11 of the connecting rod, there is a retracted portion 15 extending towards the core shaft 4, such that the rear section 12 of the connecting rod extends along the axial direction from the retracted portion 15. The retracted portion 15 can fit the radially reduced part of the core shaft 4, further ensuring a smaller radial occupied space.

[0043] The front section 1 of the connecting rod is parallel to the rear section 12 of the connecting rod. This can make the connecting rod 1 fit the core shaft 4 more closely and also facilitate the flatness and stability of the inner ring of the sun gear 100.

[0044] A shift mechanism includes a pawl 3 and a core shaft 4. A pawl seat 40 for accommodating the pawl 3 is provided on the core shaft 4, and the above-mentioned pawl control ring is also included.

[0045] An internal transmission also includes the above-mentioned pawl control ring.

[0046] The above has shown and described 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 principle 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 pawl control ring, comprising a connecting rod (1) and a control part (2) located on the connecting rod (1), wherein the control part (2) is provided with an opening groove (20) for controlling the opening and closing of a pawl (3), and the control part (2) rotates as the connecting rod (1) rotates around a core shaft (4), and is characterized in that: The connecting rod (1) includes a front connecting rod section (11) and a rear connecting rod section (12), and the distance of the rear connecting rod section (12) from the center line of the rotating shaft is less than the distance of the front connecting rod section (11) from the center line of the rotating shaft.

2. The pawl control ring according to claim 1, wherein: The control part (2) includes a front control part (21) and a rear control part (22). The front control part (21) is arranged on the front connecting rod section (11), and the rear control part (22) is arranged on the rear connecting rod section (12).

3. The pawl control ring according to claim 2, characterized in that: The rear control part (22) is arranged at the end of the rear connecting rod section (12).

4. The pawl control ring according to claim 1, wherein: The connecting rod (1) is in contact with the mandrel (4).

5. The pawl control ring according to claim 1, characterized in that: On the outer side of the connection between the rear connecting rod section (12) and the front connecting rod section (11), there is a recessed first step (13) for avoiding the smallest sun gear (100).

6. The pawl control ring according to claim 5, characterized in that: On the outer side of the connection between the rear connecting rod section (12) and the front connecting rod section (11), there is a recessed second step (14), and the distance of the second step (14) from the center line of the rotating shaft is greater than the distance of the first step (13) from the center line of the rotating shaft.

7. The pawl control ring according to claim 1, characterized in that: On the inner side of the connection between the rear connecting rod section (12) and the front connecting rod section (11), there is a retracted part (15) extending towards the mandrel (4), so that the rear connecting rod section (12) extends along the axial direction from the retracted part (15).

8. The pawl control ring according to claim 1, characterized in that: The front connecting rod section (11) and the rear connecting rod section (12) are parallel.

9. A shifting mechanism, comprising a pawl (3) and a core shaft (4), wherein a pawl seat (40) for accommodating the pawl (3) is provided on the core shaft (4), and is characterized in that: It also includes the pawl control ring according to any one of claims 1 to 8.

10. An internal transmission, characterized in that: It also includes the pawl control ring according to any one of claims 1 to 8.

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