Double-shaft differential steering device

Abstract

The utility model discloses a double-shaft differential steering device, which comprises an output shaft assembly, a first output shaft, a second output shaft and transmission teeth, the first output shaft and the second output shaft rotate independently, and the transmission teeth are fixedly sleeved on the first output shaft and the second output shaft respectively and rotate synchronously. The clutch assembly comprises a clutch shaft, a fixed tooth, a sliding tooth and a clutch disc, wherein the clutch shaft is sleeved with the fixed tooth, the sliding tooth and the clutch disc. Wherein the sliding teeth are meshed with the transmission teeth, the sliding teeth and the clutch disc are synchronously and rotationally connected, and the clutch disc can be in power connection and disconnection with the fixed teeth by sliding left and right along the clutch shaft. The differential steering device has the advantages that the clutch on one side is controlled to be separated through the manual shifting rod, power output on the side is cut off, and the other side is continuously driven to form a rotating speed difference to achieve differential steering; when the clutch discs on the two sides are meshed at the same time, the double output shafts are forced to synchronously achieve linear locking. And the clutch mechanism is integrated in the box body, so that dust prevention and collision prevention are realized, and the transmission is relatively reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of mechanical drive especially relates to a double axle differential steering device integrated in the inside of gearbox. BACKGROUND

[0002] The existing single motor driven equipment adopts single axle output or wheel differential to realize steering, the former cannot differential, the latter has dispersed structure and low reliability, the double hub motor scheme can differential steering but has high cost and is difficult to synchronous lock when walking in a straight line, therefore, the single motor driven differential clutch mechanism integrated in the gearbox is needed to solve the above problems. UTILITY MODEL CONTENTS

[0003] The utility model aims at overcoming the insufficient of prior art, provides a double axle differential steering device integrated in the inside of gearbox, is applicable to lithium electricity snow sweeper, micro tiller and other small self-propelled equipment.

[0004] In order to solve the above technical problems, the utility model provides the following technical scheme: a double axle differential steering device, comprising, output shaft assembly, including the first output shaft and the second output shaft that rotate independently, the synchronous rotation fixed sleeve of transmission tooth on the first output shaft and the second output shaft;Clutch assembly, including clutch shaft, fixed tooth, sliding tooth and clutch disc that are sleeved on the clutch shaft;Wherein, the sliding tooth is engaged with the transmission tooth, and the sliding tooth and the clutch disc are synchronously connected, the clutch disc can be connected and disconnected with the fixed tooth through the left and right sliding along the clutch shaft.

[0005] Preferably, the sliding tooth and the clutch disc are not rotatable relative to the clutch shaft, and can slide left and right along the clutch shaft.

[0006] Preferably, the fixed tooth is provided with a sliding tooth and a clutch disc on both sides, and the two sliding teeth are engaged with the transmission tooth.

[0007] Preferably, the sliding tooth and the clutch disc can be limited from rotating relative to each other by embedding the limiting tooth into the tooth groove.

[0008] Preferably, the left and right sliding of the clutch disc drives the rack to slide into or out of the long groove.

[0009] Preferably, the end portions of the first output shaft and the second output shaft are connected by the sleeve.

[0010] Preferably, the first output shaft and the second output shaft are connected by the gear teeth and the gear hole.

[0011] Preferably, the clutch disc is provided with a circumferential sliding groove, and the sliding block is clamped into the sliding groove and slides along the circumference but is limited left and right.

[0012] Preferably, a lever and a paddle are connected above the slider.

[0013] Preferably, it includes a power assembly for providing output power, wherein the output shaft of the motor in the power assembly transmits power between itself and the fixed teeth through a transmission gear set.

[0014] The beneficial effects of this utility model are as follows: the clutch on one side is disengaged by manual lever control, disconnecting the power output on that side, while the other side continues to drive to form a speed difference to achieve differential steering; when both clutch discs are engaged at the same time, the two output shafts are forced to synchronize to achieve linear locking; the all-gear transmission eliminates belt slippage, and the clutch mechanism is integrated into the housing for dust and impact protection, making the transmission more reliable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the dual-axis differential steering device described in this utility model;

[0016] Figure 2 This is a schematic diagram of the clutch assembly described in this utility model;

[0017] Figure 3 This is an exploded structural diagram of the clutch assembly described in this utility model;

[0018] Figure 4 This is an exploded view of the output shaft assembly described in this utility model;

[0019] Figure 5 This is a schematic diagram of the slider, paddle, and lever described in this utility model;

[0020] Figure 6 This is a schematic diagram of the internal structure of the dual-axis differential steering device of this utility model;

[0021] Figure 7 This is a schematic diagram of the internal structure of the dual-axis differential steering device of this utility model on the other side. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0023] Example 1

[0024] Existing single-motor solutions are mostly single-axis outputs without differential mechanisms, or they use differential mechanisms on the wheel side to achieve steering requirements, which are relatively complex, scattered, and have poor reliability. There are also dual-hub motor solutions, which can easily achieve differential steering, but require two motors, resulting in higher costs and difficulty in locking straight-line travel.

[0025] Reference Figures 1-2 This embodiment illustrates the overall structure of a dual-axis differential steering device, including an output shaft assembly 100, a clutch assembly 200, a power assembly 300, and a housing 400. The power assembly 300 provides output power, while the output shaft assembly 100 outputs power externally. For example, the drive wheels are connected to the output shaft assembly 100, and the torque on the output wheels can be applied to the drive transmission of lithium-ion snowplows or small self-propelled machines such as mini-tillers. The output shaft assembly 100 is connected to the power assembly 300 via the clutch assembly 200, which is used to disconnect and connect the power transmitted from the power assembly 300 to the output shaft assembly 100. The clutch assembly 200 is located within the housing 400.

[0026] Specifically, the dual-axis differential steering device includes an output shaft assembly 100 comprising an independently rotating first output shaft 101 and a second output shaft 102, with transmission gears 103 synchronously rotating and fixedly mounted on the first and second output shafts 101 and 102, respectively. The clutch assembly 200 includes a clutch shaft 201, fixed gears 202, sliding gears 203, and a clutch disc 204 mounted on the clutch shaft 201. The sliding gears 203 mesh with the transmission gears 103, and the sliding gears 203 and the clutch disc 204 are synchronously rotatably connected. The clutch disc 204 can engage and disengage with the fixed gears 202 by sliding left and right along the clutch shaft 201.

[0027] This embodiment adopts a single motor solution with all-gear transmission. The gearbox integrates a single-sided differential device, a manual engagement sleeve separation mechanism, and differential steering, which is relatively reliable. It can be applied to the walking transmission of lithium-ion snow sweepers, as well as small self-propelled machines such as mini tillers.

[0028] Reference Figure 3 As illustrated, to achieve single-sided clutch control with independent dual-shaft transmission, in this embodiment, the clutch control part consists of a sliding tooth 203 and a clutch disc 204 that are sleeved on the clutch shaft 201 without rotating relative to each other, and can slide together along the clutch shaft 201. The fixed tooth 202 has sliding teeth 203 and clutch discs 204 on both sides, and both sliding teeth 203 mesh with the transmission teeth 103 for transmission.

[0029] Furthermore, the relative rotation between the sliding tooth 203 and the clutch disc 204 can be restricted by the limiting tooth 203a engaging in the tooth groove 204a. The left and right sliding of the clutch disc 204 causes the rack 204b to slide into or out of the elongated groove 202a.

[0030] Reference Figure 4 As illustrated, in this embodiment, the dual-shaft independent transmission structure is such that the ends 105 of the first output shaft 101 and the second output shaft 102 are connected by a sleeve 104, and both the first output shaft 101 and the second output shaft 102 are transmitted to the transmission teeth 103 through the meshing between the shaft teeth 106 and the tooth holes 103a.

[0031] Reference Figure 5 As illustrated, to enable the clutch disc 204 to slide left and right, in one embodiment, the clutch disc 204 is provided with a circumferential groove 204c. The slider 205 is inserted into the groove 204c and slides circumferentially but is limited to the left and right. A paddle 206 and a lever 207 are connected above the slider 205.

[0032] Reference Figures 6-7 The diagram illustrates the power assembly 300 used to provide output power in this embodiment, wherein the output shaft 302 of the motor 301 in the power assembly 300 transmits power between the transmission gear set 303 and the fixed gear 202.

[0033] More specifically, the output shaft assembly 100 includes a first output shaft 101 and a second output shaft 102 arranged in parallel, which can rotate independently. Transmission gears 103 are fixedly fitted on each shaft, and the transmission gears 103 mesh with toothed holes 103a on the output shafts through shaft teeth 106 to achieve synchronous rotation. The ends 105 of the two shafts are connected by a sleeve 104 to ensure coaxiality but allow differential rotation.

[0034] The clutch assembly 200 is parallel to the output shaft; the fixed tooth 202 is fixedly sleeved in the middle of the clutch shaft 201; the sliding tooth 203 and the clutch disc 204 are arranged in pairs, and the two achieve circumferential synchronous rotation by the limiting tooth 203a being embedded in the tooth groove 204a; the sliding tooth 203 is constantly meshed with the transmission tooth 103 to transmit power; the clutch disc 204 can slide along the axial direction of the clutch shaft 201, and its outer edge is provided with a rack 204b. When sliding, the rack 204b can be inserted into or disengaged from the long groove 202a on the side of the fixed tooth 202 to achieve power engagement or disengagement.

[0035] The output shaft of the motor 301 of the power assembly 300 drives the fixed gear 202 to rotate through the transmission gear set 303.

[0036] The differential steering in this embodiment is implemented as follows:

[0037] Symmetrical clutch mechanism:

[0038] Sliding teeth 203 and clutch discs 204 are provided on both the left and right sides of the fixed gear 202. Figure 2 The two sliding teeth 203 simultaneously mesh with the transmission teeth 103 on both sides.

[0039] Under normal conditions, the racks 204b of the clutch discs 204 on both sides are embedded in the long slots 202a of the fixed teeth 202. At this time, the motor power passes through the fixed teeth 202, the clutch discs 204 on both sides, the sliding teeth 203, the transmission teeth 103, and the dual output shafts to rotate synchronously, thus achieving linear travel.

[0040] Differential triggering mechanism:

[0041] When a left turn is required, the lever 207 is moved to the right, which drives the paddle 206 and the slider 205 to move along the circumferential groove 204c, pushing the right clutch disc 204 to slide to the right along the clutch shaft 201. The right rack 204b disengages from the long groove 202a, and the power on the right side is disconnected. At this time, the power connection on the left side remains, and the right output shaft 102 rotates freely, realizing differential left turn. The same applies to right turn.

[0042] Details of the sliding control:

[0043] The sliding tooth 203 and the clutch disc 204 are linked by the limiting tooth 203a, and the two slide as a whole along the clutch shaft 201; the slider 205 is inserted into the circumferential groove 204c of the clutch disc 204, which only restricts axial displacement and allows circumferential relative movement.

[0044] The rack 204b has a raised key-like structure, and the long groove 202a is a corresponding groove; when engaged, the rack 204b is fully inserted into the long groove 202a to achieve torque transmission, and there is no contact when disengaged. The transmission gear 103 has a toothed hole 103a in the center, and the output shaft end is machined with shaft teeth 106, which are interference fit to achieve no relative rotation.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the scope of protection of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description and ideas. It is neither necessary nor possible to exhaustively describe all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the technical solution of this utility model should be covered within the scope of protection of the claims of this utility model.

Claims

1. A dual-axle differential steering device, characterized in that: include, The output shaft assembly (100) includes a first output shaft (101) and a second output shaft (102) that rotate independently, and transmission gears (103) that rotate synchronously and are respectively fixedly sleeved on the first output shaft (101) and the second output shaft (102). The clutch assembly (200) includes a clutch shaft (201), a fixed tooth (202), a sliding tooth (203), and a clutch disc (204) sleeved on the clutch shaft (201); The sliding tooth (203) meshes with the transmission tooth (103), and the sliding tooth (203) and the clutch disc (204) are synchronously rotated and connected. The clutch disc (204) can be dynamically engaged and disengaged from the fixed tooth (202) by sliding left and right along the clutch shaft (201).

2. The dual-axle differential steering device according to claim 1, characterized in that: The sliding teeth (203) and the clutch disc (204) are sleeved on the clutch shaft (201) without rotating relative to each other, and can slide together left and right along the clutch shaft (201).

3. The dual-axle differential steering device according to claim 1, characterized in that: Both sides of the fixed tooth (202) are provided with sliding teeth (203) and clutch disc (204), and both sliding teeth (203) mesh with the transmission tooth (103) for transmission.

4. The dual-axle differential steering device according to claim 1, characterized in that: The relative rotation between the sliding tooth (203) and the clutch disc (204) can be restricted by the limiting tooth (203a) being embedded in the tooth groove (204a).

5. The dual-axle differential steering device according to claim 1, characterized in that: The left and right sliding of the clutch disc (204) causes the rack (204b) to slide into or out of the long groove (202a).

6. The dual-axle differential steering device according to claim 1, characterized in that: The ends (105) of the first output shaft (101) and the second output shaft (102) are connected by a sleeve (104).

7. The dual-axle differential steering device according to claim 1, characterized in that: Both the first output shaft (101) and the second output shaft (102) are driven by the meshing between the shaft teeth (106) and the tooth holes (103a) and the transmission teeth (103).

8. The dual-axle differential steering device according to claim 1, characterized in that: The clutch disc (204) is provided with a circumferential groove (204c), and the slider (205) is inserted into the groove (204c) and slides circumferentially but is limited to the left and right.

9. The dual-axle differential steering device according to claim 8, characterized in that: The slider (205) is connected above a paddle (206) and a lever (207).

10. The dual-axle differential steering device according to claim 1, characterized in that: It includes a power assembly (300) for providing output power, wherein the output shaft (302) of the motor (301) in the power assembly (300) transmits power between the fixed teeth (202) and the transmission gear set (303).

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