A replaceable rear axle differential structure

Abstract

The utility model discloses a kind of gear-changing rear axle differential structures, it includes shell, input shaft, differential, forward drive mechanism, reverse drive mechanism, synchronizer and shift element;Input shaft is rotatably matched with shell;Differential is cooperated in shell;The forward drive mechanism's forward driving wheel rotatable sleeve input shaft's matching section, the forward drive mechanism's forward driven wheel is connected with the driving gear of differential;The reverse drive mechanism's reverse driving wheel rotatable sleeve input shaft's matching section, the reverse drive mechanism's reverse driven wheel is connected with the driving gear of differential;Synchronizer and input shaft's matching section slidingly cooperate and synchronizer and input shaft's matching section circumferentially limit cooperation, synchronizer is movably connected with forward driving wheel and reverse driving wheel;Shift element is rotatably cooperated with synchronizer and is used to drive synchronizer to move.The utility model can make tricycle have the function of reversing, to facilitate user to drive tricycle.

Description

Technical Field

[0001] This utility model relates to the field of transportation vehicles, and in particular to a shiftable rear axle differential structure. Background Technology

[0002] Existing tricycles that are driven purely by human power or those that are driven by electric power without human power do not have a reversing function. Users need to get off and push the tricycle to make it reverse, which is a functional deficiency and inconvenient for users.

[0003] In view of the above problems, it is necessary to study a shiftable rear axle differential structure that enables tricycles to have a reversing function. Utility Model Content

[0004] The purpose of this invention is to provide a shiftable rear axle differential structure that enables a tricycle to have a reversing function.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A shiftable rear axle differential structure includes a housing, an input shaft, a differential, a forward transmission mechanism, a reverse transmission mechanism, a synchronizer, and a shifting element. The input shaft is rotatably fitted to the housing and has a mating section extending into the housing. The differential is fitted inside the housing, and the housing has two half-shaft channels corresponding to the differential. The forward transmission mechanism includes a forward drive wheel and a forward driven wheel disposed within the housing. The forward drive wheel rotatably fits the mating section of the input shaft. The forward driven wheel is connected to and rotates synchronously with the drive gear of the differential. The forward driven wheel and the forward drive wheel are in a transmission fit and rotate in the same direction. The reverse transmission mechanism includes a reverse drive wheel and a reverse driven wheel disposed within the housing. The gearbox comprises a rotating section of the input shaft fitted with a reversing drive wheel, a reversing driven wheel connected to and rotating synchronously with the drive gear of the differential, and a reversing driven wheel and a reversing drive wheel with opposite rotation directions. A synchronizer is fitted onto the input shaft section and positioned between the forward and reversing drive wheels. The synchronizer slides on the input shaft section and is circumferentially limited by the input shaft section. The synchronizer is movably connected to both the forward and reversing drive wheels, and its outer wall has an annular groove along its circumference. The shifting component includes a connected shift fork and a shift lever. The shift fork is inserted into the annular groove of the synchronizer and rotates with it. The shift lever is parallel to the input shaft and slides on the outer casing.

[0007] The outer shell comprises two connected half-shells.

[0008] One end of the lever extends out of the housing, and the other end of the lever is connected to the shift fork.

[0009] The housing is fitted with a shift motor, which is driven by a shift nut, and the shift nut is screwed to the lever.

[0010] The shift motor is fitted onto the outside of the housing, and the output shaft of the shift motor is connected to a transmission gear, which meshes with the shift nut.

[0011] The forward drive wheel and the forward driven wheel are driven by a forward chain, and the forward drive wheel and the forward driven wheel mesh with the inner side of the forward chain.

[0012] The backward transmission mechanism also includes at least one rotatable backward guide wheel fitted inside the housing. The backward driving wheel, the backward driven wheel, and the backward guide wheel are driven and engaged by a backward chain. The backward driving wheel and the backward guide wheel mesh with the inner side of the backward chain, and the backward driven wheel meshes with the outer side of the backward chain.

[0013] The synchronizer has at least two splines on its inner side; the mating section of the input shaft has keyways that slide with each spline of the synchronizer.

[0014] The splines of the synchronizer protrude from both ends of the synchronizer; the forward drive wheel is provided with forward slots that are movably inserted into each spline of the synchronizer; the backward drive wheel is provided with backward slots that are movably inserted into each spline of the synchronizer.

[0015] The outer casing is fitted with a flywheel mounting bracket.

[0016] After adopting the above solution, the working principle of this utility model is as follows: the user can drive the synchronizer to move through the shifting component and control the tricycle to move forward and backward;

[0017] When the synchronizer is moved to connect with the forward drive wheel, it is in the forward gear. The input shaft drives the forward drive wheel to rotate through the synchronizer. The forward drive wheel then drives the differential's drive wheel to rotate forward through the forward driven wheel, thereby driving the tricycle forward and realizing the forward function.

[0018] When the synchronizer is engaged with the reverse drive wheel, it is in reverse gear. The input shaft drives the reverse drive wheel through the synchronizer, which in turn drives the reverse drive wheel to rotate. The reverse drive wheel then drives the differential's drive wheel to rotate forward through the reverse driven wheel, thus driving the tricycle to reverse and achieving the reverse function.

[0019] As can be seen from the above, this utility model enables tricycles to have a reversing function, thereby making it more convenient for users to drive tricycles. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0022] Figure 3 Structural breakdown of this utility model Figure 1 .

[0023] Figure 4 Structural breakdown of this utility model Figure 2 .

[0024] Figure 5 A cross-sectional view of this utility model Figure 1 (Forward gear).

[0025] Figure 6 A cross-sectional view of this utility model Figure 2 (Reverse gear).

[0026] Figure 7 This is a schematic diagram of the input shaft of this utility model.

[0027] Figure 8 This is a schematic diagram of the forward drive wheel of this utility model.

[0028] Figure 9 This is a schematic diagram of the reversing drive wheel of this utility model.

[0029] Figure 10 This is a schematic diagram of the synchronizer of this utility model.

[0030] Figure 11 This is a schematic diagram of the present invention installed on a tricycle.

[0031] Label Explanation:

[0032] Outer shell 1, half shell 11, half shaft channel 111,

[0033] Input shaft 2, mating section 21, keyway 211,

[0034] Differential 3,

[0035] Forward transmission mechanism 4, forward drive wheel 41, forward slot 411, forward driven wheel 42, forward chain 43.

[0036] Reverse transmission mechanism 5, reverse drive wheel 51, reverse slot 511, reverse driven wheel 52, reverse guide wheel 53, reverse chain 54.

[0037] Synchronizer 6, ring groove 61, spline 62,

[0038] Shift piece 7, shift fork 71, shift lever 72, shift nut 73.

[0039] Shift motor 8, transmission gear 81,

[0040] Flywheel mounting bracket 9,

[0041] Center axle A, rear wheel B. Detailed Implementation

[0042] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0043] like Figures 1 to 11 As shown, this utility model discloses a shiftable rear axle differential structure, which includes a housing 1, an input shaft 2, a differential 3, a forward transmission mechanism 4, a reverse transmission mechanism 5, a synchronizer 6, and a shifting component 7; wherein, the input shaft 2 is rotatably coupled to the housing 1, and the input shaft 2 has a mating section 21 extending into the housing 1, the input shaft 2 is used for unidirectional transmission with the central axle A of the tricycle, the transmission structure of the input shaft 2 and the central axle A of the tricycle is prior art, and will not be described in detail here; the differential 3 is fitted inside the housing 1, the housing 1 The differential 3 has two half-shaft channels 111. The differential 3 is connected to the left and right rear wheels B of the tricycle by two half-shafts passing through the two half-shaft channels 111 respectively. The structure of the differential 3 and the connection structure between the differential 3 and the left and right rear wheels B are existing technologies and will not be described in detail here. The forward transmission mechanism 4 includes a forward drive wheel 41 and a forward driven wheel 42 disposed in the housing 1. The forward drive wheel 41 is rotatably fitted with a mating section 21 of the input shaft 2. The forward driven wheel 42 is connected to the drive gear of the differential 3. The forward driven wheel 42 and the forward driving wheel 41 are connected and rotate synchronously, with their rotation directions being the same. The backward transmission mechanism 5 includes a backward driving wheel 51 and a backward driven wheel 52 disposed in the housing 1. The backward driving wheel 51 is rotatably fitted onto the mating section 21 of the input shaft 2. The backward driven wheel 52 is connected to the driving gear of the differential 3 and rotates synchronously. The backward driven wheel 52 and the backward driving wheel 51 are connected and rotate in opposite directions. The synchronizer 6 is fitted onto the mating section 21 of the input shaft 2 and... Synchronizer 6 is located between forward drive wheel 41 and reverse drive wheel 51. Synchronizer 6 is slidably engaged with the mating section 21 of input shaft 2 and is circumferentially limited to the input shaft 2. Synchronizer 6 is movably connected to forward drive wheel 41 and reverse drive wheel 51. The outer wall of synchronizer 6 has an annular groove 61 along its circumference. The shifting component 7 includes a connected shift fork 71 and shift lever 72. The shift fork is inserted into the annular groove 61 of synchronizer 6 and rotates with synchronizer 6. The shift lever 72 is arranged parallel to the input shaft 2 and is slidably engaged with the outer casing 1.

[0044] The working principle of this utility model is as follows: the user can drive the synchronizer 6 to move through the shifter 7 and control the tricycle to move forward and backward.

[0045] When synchronizer 6 moves to connect with forward drive wheel 41, it is in forward gear. Input shaft 2 drives forward drive wheel 41 to rotate through synchronizer 6. Forward drive wheel 41 then drives the drive wheel of differential 3 to rotate forward through forward driven wheel 42, thereby driving the tricycle forward and realizing the forward function.

[0046] When synchronizer 6 moves to connect with reverse drive wheel 51, it is in reverse gear. Input shaft 2 drives reverse drive wheel 51 through synchronizer 6. Reverse drive wheel 51 rotates, and then reverse drive wheel 51 drives the drive wheel of differential 3 to rotate in the opposite direction through reverse driven wheel 52, thereby driving the tricycle to reverse and realizing the reverse function.

[0047] In an embodiment of this utility model, the outer shell 1 includes two connected half-shells 11, which facilitates the installation of the input shaft 2, differential 3, forward transmission mechanism 4, reverse transmission mechanism 5, synchronizer 6, and shifting component 7.

[0048] In this embodiment of the present invention, one end of the lever 72 protrudes outside the housing 1, and the other end of the lever 72 is connected to the shift fork 71; the end of the lever 72 protruding from the housing 1 allows the user to drive the shifting component 7 to move. The shifting component 7 can be driven to move by the shifting motor 8. Specifically, the housing 1 is fitted with the shifting motor 8, and the shifting motor 8 is connected to the shifting nut 73. The shifting nut 73 is screwed to the lever 72 of the shifting component 7. The shifting motor 8 drives the shifting nut 73 to rotate forward and backward, thereby driving the lever 72 to move forward and backward accordingly, thereby controlling the synchronizer 6 to selectively connect one of the forward drive wheel 41 and the backward drive wheel 51; the shifting motor 8 can be fitted to the outside of the housing 1 for easy maintenance of the shifting motor 8, and the output shaft of the shifting motor 8 is connected to the transmission gear 81, which meshes with the shifting nut 73. It should be noted that the shifting component 7 of this utility model is not limited to being driven by the shifting motor 8. The shifting component 7 can also be driven by a spring and a pull cable. The spring is used to keep the shifting component 7 in the position where the synchronizer 6 is connected to the forward drive wheel 41, and the pull cable is used to pull the shifting component 7 to move to the position where the synchronizer 6 is connected to the rear drive wheel.

[0049] In an embodiment of this utility model, the forward drive wheel 41 and the forward driven wheel 42 can be driven together by the forward chain 43, and the forward drive wheel 41 and the forward driven wheel 42 mesh with the inner side of the forward chain 43; this arrangement makes the forward drive wheel 41 and the forward driven wheel 42 rotate in the same direction.

[0050] In an embodiment of this utility model, the reversing transmission mechanism 5 further includes at least one rotatable reversing guide wheel 53 fitted inside the housing 1. The reversing driving wheel 51, the reversing driven wheel 52, and the reversing guide wheel 53 are driven and engaged by the reversing chain 54. The reversing driving wheel 51 and the reversing guide wheel 53 mesh with the inner side of the reversing chain 54, and the reversing driven wheel 52 meshes with the outer side of the reversing chain 54. This arrangement ensures that the reversing driving wheel 51 and the reversing driven wheel 52 rotate in opposite directions.

[0051] In an embodiment of this utility model, the synchronizer 6 has at least two splines 62 on its inner side; the mating section 21 of the input shaft 2 has keyways 211 that slide with each spline 62 of the synchronizer 6 respectively; this arrangement allows the synchronizer 6 to slide with the mating section 21 of the input shaft 2 and the synchronizer 6 to be circumferentially limited with the input shaft 2.

[0052] In an embodiment of this utility model, each spline 62 of the synchronizer 6 protrudes from both ends of the synchronizer 6; the forward drive wheel 41 is provided with forward slots 411 that are movably inserted into each spline 62 of the synchronizer 6; and the reverse drive wheel 51 is provided with reverse slots 511 that are movably inserted into each spline 62 of the synchronizer 6. When the synchronizer 6 is connected to the forward drive wheel 41, each spline 62 of the synchronizer 6 is inserted into each forward slot 411 of the forward drive wheel 41, so that the synchronizer 6 can drive the forward drive wheel 41 to rotate; when the synchronizer 6 is connected to the reverse drive wheel 51, each spline 62 of the synchronizer 6 is inserted into each reverse slot 511 of the reverse drive wheel 51, so that the synchronizer 6 can drive the reverse drive wheel 51 to rotate.

[0053] In an embodiment of this utility model, the outer shell 1 may be fitted with a flywheel mounting seat 9; the central axle A of the tricycle can be coupled with the input shaft 2 for one-way transmission through the gearbox, the gearbox chain is connected to the central axle A, and the flywheel of the gearbox is installed on the flywheel mounting seat 9, so that the gearbox can make the user ride more effortlessly.

[0054] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A shiftable rear axle differential structure, characterized in that: Includes housing, input shaft, differential, forward drive mechanism, reverse drive mechanism, synchronizer, and shift mechanism; The input shaft is rotatably fitted with the housing, and the input shaft has a fitting section that extends into the housing; The differential is fitted inside the housing, and the housing has two half-shaft channels corresponding to the differential. The forward transmission mechanism includes a forward drive wheel and a forward driven wheel disposed in the housing. The forward drive wheel has a rotatable fitting section that is sleeved on the input shaft. The forward driven wheel is connected to the drive gear of the differential and rotates synchronously. The forward driven wheel and the forward drive wheel are in a transmission fit and their rotation directions are the same. The reversing transmission mechanism includes a reversing drive wheel and a reversing driven wheel disposed in the housing. The reversing drive wheel has a rotatable fitting section that is sleeved on the input shaft. The reversing driven wheel is connected to the drive gear of the differential and rotates synchronously. The reversing driven wheel and the reversing drive wheel are in transmission cooperation and their rotation directions are opposite. The synchronizer is fitted onto the mating section of the input shaft and is located between the forward drive wheel and the reverse drive wheel. The synchronizer and the mating section of the input shaft are in sliding fit and circumferentially limited fit. The synchronizer is movably connected to the forward drive wheel and the reverse drive wheel. The outer wall of the synchronizer is provided with an annular groove along its circumference. The shifting component includes a connected shift fork and a shift lever. The shift fork is inserted into the annular groove of the synchronizer and rotates with the synchronizer. The shift lever is arranged parallel to the input shaft and slides with the housing.

2. The shiftable rear axle differential structure as described in claim 1, characterized in that: The outer shell comprises two connected half-shells.

3. The shiftable rear axle differential structure as described in claim 1, characterized in that: One end of the lever extends out of the housing, and the other end of the lever is connected to the shift fork.

4. A shiftable rear axle differential structure as described in claim 1 or 3, characterized in that: The housing is fitted with a shift motor, which is driven by a shift nut, and the shift nut is screwed to the lever.

5. The shiftable rear axle differential structure as described in claim 4, characterized in that: The shift motor is fitted onto the outside of the housing, and the output shaft of the shift motor is connected to a transmission gear, which meshes with the shift nut.

6. The shiftable rear axle differential structure as described in claim 1, characterized in that: The forward drive wheel and the forward driven wheel are driven by a forward chain, and the forward drive wheel and the forward driven wheel mesh with the inner side of the forward chain.

7. The shiftable rear axle differential structure as described in claim 1, characterized in that: The backward transmission mechanism also includes at least one rotatable backward guide wheel fitted inside the housing. The backward driving wheel, the backward driven wheel, and the backward guide wheel are driven and engaged by a backward chain. The backward driving wheel and the backward guide wheel mesh with the inner side of the backward chain, and the backward driven wheel meshes with the outer side of the backward chain.

8. The shiftable rear axle differential structure as described in claim 1, characterized in that: The synchronizer has at least two splines on its inner side; the mating section of the input shaft has keyways that slide with each spline of the synchronizer.

9. The shiftable rear axle differential structure as described in claim 1, characterized in that: The splines of the synchronizer protrude from both ends of the synchronizer; the forward drive wheel is provided with forward slots that are movably inserted into each spline of the synchronizer; the backward drive wheel is provided with backward slots that are movably inserted into each spline of the synchronizer.

10. A shiftable rear axle differential structure as described in claim 1, characterized in that: The outer casing is fitted with a flywheel mounting bracket.

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