Variable eccentric gear and clutch having such variable eccentric gear

Abstract

A variable eccentric gear, consisting of an inner wheel (1), an outer wheel (2), a spring (3), a locking pin (4) and a shifting fork (5). The working state of the variable eccentric gear is changed by controlling the relative position of the inner wheel (1) and the outer wheel (2) in the radial direction. In a clutch having such variable eccentric gear, the clutch is disengaged and engaged by controlling different working states of the variable eccentric gear in the clutch, the clutch using a constant mesh gear structure.

Description

Variable eccentric gear and clutch with the same TECHNICAL FIELD

[0001] The present application belongs to the field of mechanical transmission, in particular, it relates to a variable eccentric gear and a clutch with the same. BACKGROUND

[0002] Any mechanical system is composed of multiple simple mechanical parts, including gears, shafts, clutches, bearings, washers, springs, screws, pipelines, housings, etc. Each mechanical part has a specific single function, and different functional mechanical parts are assembled together to form a mechanical system with complete functions. TECHNICAL PROBLEM

[0003] The purpose of the present application is to provide a new mechanical part, a variable eccentric gear, and a new clutch with the same. TECHNICAL SOLUTION

[0004] The variable eccentric gear provided by the present application comprises an inner wheel (1), an outer wheel (2), a spring (3), a locking bolt (4), and a shift fork (5). The outer wheel (2) is installed on the inner wheel (1) and rotates synchronously with the inner wheel (1), and the outer wheel (2) can be displaced by a small distance in a radial direction of the inner wheel (1). The spring (3) is installed between the inner wheel (1) and the outer wheel (2) to limit the initial position and the reset position of the inner wheel (1) and the outer wheel (2) in the radial direction. The locking bolt (4) is installed on the inner wheel (1) and rotates synchronously with the inner wheel (1), and the locking bolt (4) can axially slide on the inner wheel (1) to change the radial relative position of the inner wheel (1) and the outer wheel (2). The shift fork (5) is used to control the axial position of the locking bolt (4).

[0005] Preferably, when the shift fork (5) pushes the locking bolt (4) to axially slide and insert between the inner wheel (1) and the outer wheel (2), the spring (3) is compressed, and the variable eccentric gear works in an eccentric state; when the shift fork (5) pushes the locking bolt (4) to axially slide out of the inner wheel (1) and the outer wheel (2), the spring (3) pushes the outer wheel (2) to reset, and the variable eccentric gear works in a normal state.

[0006] Preferably, when the shift fork (5) pushes the locking bolt (4) to axially slide and insert between the inner wheel (1) and the outer wheel (2), the spring (3) is compressed, and the variable eccentric gear works in a normal state; when the shift fork (5) pushes the locking bolt (4) to axially slide out of the inner wheel (1) and the outer wheel (2), the spring (3) pushes the outer wheel (2) to reset, and the variable eccentric gear works in an eccentric state.

[0007] Preferably, the spring (3) can be replaced by a locking bolt (10), and the locking bolt (4) and the locking bolt (10) jointly control the radial relative position of the inner wheel (1) and the outer wheel (2) to change the state of the variable eccentric gear.

[0008] The application also provides a clutch, which comprises a sun gear, a planet carrier with at least one planet gear, and among all the gears of the clutch, one gear must be a variable eccentric gear, and the sun gear and the planet carrier are the driving member and the driven member of the clutch respectively, when the variable eccentric gear is controlled to work in the ordinary gear state, the sun gear and the planet carrier do not affect each other, and the clutch is separated; when the variable eccentric gear is controlled to work in the eccentric gear state, the sun gear and the planet carrier are locked to rotate synchronously as a whole, and the clutch is combined.

[0009] Preferably, the sun gear is the variable eccentric gear.

[0010] Preferably, the sun gear is the variable eccentric gear.

[0011] Preferably, the sun gear is the variable eccentric gear. Advantages

[0012] The application can constitute a new clutch by decomposing the ordinary gear into two parts of the inner wheel and the outer wheel, changing the relative position of the inner wheel and the outer wheel by the control mechanism to realize two different working modes, and applying the new clutch in the planetary gear system. The new clutch is composed of the constantly meshing gears, has the advantages of small size and large torque capacity compared with the existing clutch. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a variable eccentric gear of the application

[0014] Fig. 2 is an exploded view of the variable eccentric gear of the application

[0015] Fig. 3 is an installation schematic diagram of the spring (3) and the outer wheel (2)

[0016] Fig. 4 is an installation schematic diagram of the spring (3) and the inner wheel (1)

[0017] Fig. 5 is a sectional view of the variable eccentric gear working in the ordinary state

[0018] Fig. 6 is a schematic diagram of the variable eccentric gear working in the ordinary state

[0019] Fig. 7 is a sectional view of the variable eccentric gear working in the eccentric state

[0020] Fig. 8 is a schematic diagram of the variable eccentric gear working in the eccentric state

[0021] Figure 9 is another variable eccentric gear of the present application

[0022] Figure 10 is a double locking bolt variable eccentric gear provided by the present application

[0023] Figure 11 is an exploded view of the double locking bolt variable eccentric gear

[0024] Figure 12 is a cross-sectional view of the double locking bolt variable eccentric gear working in a normal state

[0025] Figure 13 is a process of switching the double locking bolt variable eccentric gear to an eccentric state

[0026] Figure 14 is a process of switching the double locking bolt variable eccentric gear back to a normal state

[0027] Figure 15 is a clutch provided by the present application

[0028] Figure 16 is an exploded view of the clutch

[0029] Figure 17 is a schematic view of the clutch in a disengaged state

[0030] Figure 18 is a schematic view of the clutch in an engaged state

[0031] Figure 19 is a second clutch provided by the present application

[0032] Figure 20 is an exploded view of the second clutch

[0033] Figure 21 is a schematic view of the second clutch in a disengaged state

[0034] Figure 22 is a schematic view of the second clutch in an engaged state

[0035] Figure 23 is a third clutch provided by the present application

[0036] Figure 24 is an exploded view of the third clutch

[0037] Figure 25 is a schematic view of the third clutch in a disengaged state

[0038] Figure 26 is a schematic view of the third clutch in an engaged state

[0039]

[0040] Figure illustration number:

[0041] 1 - inner wheel; 2 - outer wheel; 3 - spring; 4 - locking bolt; 5 - yoke; 6 - gear; 7 - carrier; 8 - ring gear; 9 - carrier; 10 - locking bolt Best mode of the present application

[0042] Embodiment one, as shown in Figure 1 is a variable eccentric gear provided by the present application, which comprises an inner wheel 1, an outer wheel 2, a spring 3, a locking bolt 4, a shift fork 5, and Figure 2 is an exploded view thereof. The square part in the middle of the inner wheel 1 is installed inside the opening of the outer wheel 2, the left and right outer walls of the square part of the inner wheel 1 correspondingly fit the left and right inner walls of the outer wheel 2, the spring 3 is installed between the upper outer wall of the square part of the inner wheel 1 and the upper inner wall of the outer wheel 2, the spring 3 is an arc-shaped leaf spring, as shown in Figure 3, the top of the spring 3 and the arc-shaped opening 21 of the upper inner wall of the outer wheel 2 fit, as shown in Figure 4, the two ends of the spring 3 and the upper outer wall of the square part of the inner wheel 1 fit, the locking bolt 4 is installed between the lower outer wall of the square part of the inner wheel 1 and the lower inner wall of the outer wheel 2, the locking bolt 4 rotates synchronously with the inner wheel 1 and can axially slide on the inner wheel 1, and the shift fork 5 is used to control the axial position of the locking bolt 4 on the inner wheel 1.

[0043] As shown in Figure 5, in the initial state, the shift fork 5 and the locking bolt 4 are not in action, under the elastic force of the spring 3, the lower outer wall of the square part of the inner wheel 1 and the lower inner wall of the outer wheel 2 fit, the variable eccentric gear works in the ordinary gear mode shown in Figure 6 (the dotted line represents the addendum circle in the ordinary mode), at this time the variable eccentric gear as a whole is equivalent to an ordinary gear; when the shift fork 5 pushes the locking bolt 4 to slide to the left, the locking bolt 4 is inserted between the lower outer wall of the square part of the inner wheel 1 and the lower inner wall of the outer wheel 2, in the process of insertion of the locking bolt 4, the inclined surface 41 of the locking bolt 4 pushes the inclined surface 22 of the outer wheel 2, so that the outer wheel 2 is displaced downward relative to the inner wheel 1, as shown in Figure 7, the lower outer wall of the square part of the inner wheel 1 and the lower inner wall of the outer wheel 2 are separated, the spring 3 is fully compressed into the arc-shaped opening 21 of the outer wheel 2, the variable eccentric gear works in the eccentric gear mode shown in Figure 8 (the dotted line represents the addendum circle in the ordinary mode); when the variable eccentric gear needs to switch back to the ordinary gear mode, the shift fork 5 pushes the locking bolt 4 to slide out of the lower outer wall of the square part of the inner wheel 1 and the lower inner wall of the outer wheel 2, under the reverse thrust of the spring 3, the lower outer wall of the square part of the inner wheel 1 and the lower inner wall of the outer wheel 2 fit, the variable eccentric gear returns to the ordinary gear mode.

[0044] As shown in Figure 9, the variable eccentric gear of the present embodiment can also be designed such that its initial working state is the eccentric gear mode, and when the shift fork 5 pushes the locking bolt 4 to insert between the lower outer wall of the square part of the inner wheel 1 and the lower inner wall of the outer wheel 2, it is switched to the ordinary gear mode.

[0045] Embodiment two, on the basis of embodiment one, the spring 3 is replaced by a locking bolt 10, the locking bolt 10 and the locking bolt 4 are connected as a whole and are controlled by the shift fork 5, the inner upper wall of the outer wheel 2 is correspondingly provided with an inclined surface 23, that is, the variable eccentric gear with double locking bolts provided by the present embodiment is obtained, Figure 10 is the main structure diagram of the present embodiment, and Figure 11 is an exploded view of the present embodiment.

[0046] As shown in FIG. 12, in the initial state, the locking pin 4 is not inserted between the inner wheel 1 and the outer wheel 2, the locking pin 10 has been inserted between the inner wheel 1 and the outer wheel 2, and the variable eccentric gear works in the ordinary gear mode; when the variable eccentric gear needs to be switched to the eccentric gear mode, the control yoke 5 pushes the locking pin 10 and the locking pin 4 to slide leftward at the same time, and the process can be divided into three steps shown in FIG. 13: ① first, the locking pin 10 is unlocked, ② then the locking pin 4 pushes the outer wheel 2 to move downward, ③ finally, the locking pin 4 is locked, and the variable eccentric gear completes the state switching; when the variable eccentric gear needs to be switched back to the ordinary gear mode, the control yoke 5 pushes the locking pin 10 and the locking pin 4 to slide rightward at the same time, and the switching process can also be divided into three steps shown in FIG. 14: ① first, the locking pin 4 is unlocked, ② then the locking pin 10 pushes the outer wheel 2 to move upward, ③ finally, the locking pin 10 is locked, and the variable eccentric gear completes the state switching.

[0047] As shown in FIG. 15, the clutch provided by the present application is a planetary gear system without a gear ring, and its exploded view is shown in FIG. 16. The clutch comprises the variable eccentric gear provided by the embodiment one, a gear 6, and a planet carrier 7. The variable eccentric gear is the sun gear of the planetary gear system, the inner wheel 1 is freely rotatably installed at the center position of the planet carrier 7, and the gear 6 is freely rotatably installed on the planet carrier 7 and meshes with the outer wheel 2 of the variable eccentric gear as a planetary gear, and the inner wheel 1 and the planet carrier 7 of the variable eccentric gear are the driving end and the driven end of the clutch, respectively.

[0048] As shown in FIG. 17 (the dotted line in the figure represents the addendum circle of the variable eccentric gear working in the ordinary mode), when the variable eccentric gear works in the ordinary gear mode, the yoke 5 does not need to act, the variable eccentric gear drives the gear 6 to idle, the variable eccentric gear and the planet carrier 7 do not affect each other, and the driving end inner wheel 1 and the driven end planet carrier 7 of the clutch are equivalent to being separated; as shown in FIG. 18 (the dotted line in the figure represents the addendum circle of the variable eccentric gear working in the ordinary mode), when the control yoke 5 makes the variable eccentric gear work in the eccentric gear mode, the variable eccentric gear cannot continuously drive the gear 6 to rotate, the gear 6 is locked and cannot rotate when the meshing gap between the outer wheel 2 of the variable eccentric gear and the gear 6 is 0, the entire planetary gear system is locked as a whole and rotates synchronously after the gear 6 is locked, and the driving end inner wheel 1 and the driven end planet carrier 7 of the clutch are equivalent to being combined; when the clutch needs to be separated, it only needs to control the yoke 5 to make the variable eccentric gear work back to the ordinary gear mode. In this embodiment, the working mode of the variable eccentric gear is directly changed by the yoke 5 to indirectly control the force relationship between the driving end inner wheel 1 and the driven end planet carrier 7, so that the planetary gear system realizes the function of the clutch.

[0049] Figure 19 is another clutch provided by the present application, and Figure 20 is an exploded view thereof, which is based on the third embodiment, and the positions of the sun gear and the planetary gear in the planetary gear system are interchanged, i.e. the gear 6 is used as the central gear of the planetary gear system, and the variable eccentric gear is used as the planetary gear of the system, and the gear 6 and the planet carrier 7 are the driving end and the driven end of the clutch, respectively.

[0050] Figure 21 shows that, when the control yoke 5 is controlled to make the variable eccentric gear work in the ordinary gear mode, the gear 6 idles the variable eccentric gear, the gear 6 and the planet carrier 7 do not affect each other, and the driving end gear 6 and the driven end planet carrier 7 of the clutch are equivalent to being separated; and Figure 22 shows that, when the control yoke 5 is controlled to make the variable eccentric gear work in the eccentric gear mode, the gear 6 cannot continuously rotate the variable eccentric gear, the variable eccentric gear is locked when the meshing gap between the variable eccentric gear and the gear 6 is 0, the entire planetary gear system is locked to rotate synchronously as a whole after the variable eccentric gear is locked, and the driving end gear 6 and the driven end planet carrier 7 of the clutch are equivalent to being combined.

[0051] Figure 23 is a third clutch provided by the present application, and Figure 24 is an exploded view thereof, which is a planetary gear system without a sun gear, and includes a variable eccentric gear provided by the first embodiment, a ring gear 8, and a planet carrier 9. The variable eccentric gear is used as a planetary gear, the inner wheel 1 of the variable eccentric gear is freely rotatably installed on the planet carrier 9, and the outer wheel 2 of the variable eccentric gear is internally meshed with the ring gear 8, the ring gear 8 is the central gear of the planetary gear system, and the ring gear 8 and the planet carrier 9 are the driving end and the driven end of the clutch, respectively.

[0052] Figure 25 shows that, when the variable eccentric gear works in the ordinary gear mode, the ring gear 8 idles the variable eccentric gear, the ring gear 8 and the planet carrier 9 do not affect each other, and the driving end ring gear 8 and the driven end planet carrier 9 of the clutch are equivalent to being separated; and Figure 26 shows that, when the control yoke 5 is controlled to make the variable eccentric gear work in the eccentric gear mode, the ring gear 8 cannot continuously rotate the variable eccentric gear, the variable eccentric gear is locked when the meshing gap between the outer wheel 2 of the variable eccentric gear and the ring gear 8 is 0, the entire planetary gear system is locked to rotate synchronously as a whole after the variable eccentric gear is locked, and the driving end ring gear 8 and the driven end planet carrier 9 of the clutch are equivalent to being combined.

Claims

1. A variable eccentric gear, characterized by It includes an inner wheel (1), an outer wheel (2), a spring (3), a locking bolt (4) and a shift fork (5), the outer wheel (2) is installed on the inner wheel (1) and rotates synchronously with the inner wheel (1), and the outer wheel (2) can be displaced by a small distance in a radial direction of the inner wheel (1), the spring (3) is installed between the inner wheel (1) and the outer wheel (2) to limit the initial position and reset of the inner wheel (1) and the outer wheel (2) in the radial direction, the locking bolt (4) is installed on the inner wheel (1) and rotates synchronously with the inner wheel (1), and the locking bolt (4) can axially slide on the inner wheel (1) to change the radial relative position of the inner wheel (1) and the outer wheel (2), and the shift fork (5) is used to control the axial position of the locking bolt (4).

2. The variable eccentric gear of claim 1, wherein: When the shift fork (5) pushes the locking bolt (4) to axially slide and insert between the inner wheel (1) and the outer wheel (2), the spring (3) is compressed, and the variable eccentric gear works in the eccentric state; when the shift fork (5) pushes the locking bolt (4) to axially slide out of the inner wheel (1) and the outer wheel (2), the spring (3) pushes the outer wheel (2) to reset, and the variable eccentric gear works in the normal state.

3. The variable eccentric gear of claim 1, wherein: The spring (3) can be replaced by a locking bolt (10), and the locking bolt (4) and the locking bolt (10) jointly control the radial relative position of the inner wheel (1) and the outer wheel (2) to change the state of the variable eccentric gear.

4. A clutch characterized by: It includes a central gear, a planet carrier with at least one planet gear, among all gears of the clutch, there must be a variable eccentric gear as claimed in claim 1, the central gear and the planet carrier are respectively the driving member and the driven member of the clutch, when the variable eccentric gear is controlled to work in the normal state, the driving member and the driven member of the clutch do not affect each other, the clutch is separated, and when the variable eccentric gear is controlled to work in the eccentric state, the driving member and the driven member of the clutch are locked to rotate synchronously, and the clutch is combined.

5. The clutch of claim 4 wherein: The central gear is a sun gear, and the sun gear is a variable eccentric gear as claimed in claim 1.

6. The clutch of claim 4 wherein: The central gear is a sun gear, and the planet gear is at least one variable eccentric gear as claimed in claim 1.

7. The clutch of claim 4 wherein: The central gear is a ring gear, and the planet gear is at least one variable eccentric gear as claimed in claim 1.

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