Broken shaft power take-off device

Abstract

The invention relates to the technical field of automobile manufacturing, in particular to a broken shaft power take-off device. Wherein the power input shaft and the power output shaft are coaxially arranged, the power input shaft and the power output shaft are both rotationally arranged in the shell, the power take-off shaft is rotationally arranged in the shell, the power take-off shaft and the power input shaft are arranged in parallel and at intervals, the power take-off input gear is arranged on the power input shaft in an empty sleeving mode, and the power take-off output gear is fixedly connected to the power take-off shaft. The power take-off input gear is meshed with the power take-off output gear, the gear sleeve is slidably arranged on the power input shaft, the driving part is in transmission connection with the gear sleeve, and when the gear sleeve is located at the first position, the gear sleeve is in spline connection with the power input shaft and the power take-off input gear. When the gear sleeve is located at the first position, the gear sleeve is in spline connection with the power input shaft, the power take-off input gear and the power output shaft, and when the gear sleeve is located at the third position, the gear sleeve is in spline connection with the power input shaft and the power output shaft. The device is simple in structure, and can realize three modes of driving power take-off, parking power take-off and driving non-power take-off.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and in particular to a broken axle power take-off device. Background Art

[0002] Existing broken-axle power take-offs have a single function and can generally only be used for driving power take-off or parking power take-off. Multifunctional broken-axle power take-offs use two sets of shifting mechanisms and two pairs of gears to enable the vehicle to have both driving power take-off and parking power take-off functions. At the same time, multifunctional broken-axle power take-offs have a complex structure, a high failure rate, and are difficult to maintain.

[0003] Therefore, there is an urgent need for a broken shaft power take-off device to solve the above technical problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a broken axle power take-off device, which can simplify the structure, reduce the failure rate, and at the same time realize three modes of driving power take-off, parking power take-off and driving without power take-off.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A broken shaft power take-off device, comprising: a housing, a power input shaft, a power output shaft, a power take-off shaft, a power take-off input gear, a power take-off output gear, a gear sleeve and a driving member, wherein the power input shaft and the power output shaft are coaxially arranged, and the power input shaft and the power output shaft are both rotatably arranged in the housing, the power take-off shaft is rotatably arranged in the housing, the power take-off shaft is parallel to the power input shaft and spaced apart, the power take-off input gear is loosely sleeved on the power input shaft, the power take-off output gear is fixedly connected to the power take-off shaft, the power take-off input gear and the power take-off output gear are fixedly connected to the power take-off shaft, and the power take-off input gear and the power take-off output gear are fixedly connected to the power take-off shaft. The gear sleeve is engaged with the gear wheel, and the gear sleeve is slidably arranged on the power input shaft. The driving member is transmission-connected to the gear sleeve so that the gear sleeve has a first position, a second position and a third position. When the gear sleeve is in the first position, the gear sleeve is spline-connected to the power input shaft and the power take-off input gear. When the gear sleeve is in the second position, the gear sleeve is spline-connected to the power input shaft, the power take-off input gear and the power output shaft. When the gear sleeve is in the third position, the gear sleeve is spline-connected to the power input shaft and the power output shaft.

[0007] As a preferred technical solution of the above-mentioned broken shaft power take-off device, the broken shaft power take-off device further includes a shift fork, and two ends of the shift fork are respectively connected to the gear sleeve and the driving member.

[0008] As an optimal technical solution of the above-mentioned broken axle power take-off device, the driving member includes a shell, a first piston and a second piston, and a accommodating chamber is provided in the shell. The first piston and the second piston are spaced and slidably arranged in the accommodating chamber to divide the accommodating chamber into a first air chamber, a second air chamber and a third air chamber. One end of the shift fork passes through the shell and is connected to the first piston. When the gear sleeve is in the first position, the first air chamber is connected to the inflation device. When the gear sleeve is in the second position, the first air chamber and the third air chamber are both connected to the inflation device. When the gear sleeve is in the third position, the second air chamber is connected to the inflation device.

[0009] As a preferred technical solution of the above-mentioned broken axle power take-off device, the driving member also includes a plurality of first seals, wherein a part of the first seals are arranged between the inner wall of the accommodating chamber and the first piston, and another part of the first seals are arranged between the inner wall of the accommodating chamber and the second piston.

[0010] As an optimal technical solution of the above-mentioned broken shaft power take-off device, the broken shaft power take-off device also includes a fork shaft, one end of the fork shaft passes through the housing and is connected to the first piston, and the other end of the fork shaft is connected to the shift fork.

[0011] As an optimal technical solution of the above-mentioned broken shaft power take-off device, the driving member also includes a retaining ring, which is fixed to the inner wall of the accommodating cavity, and the retaining ring is located between the first piston and the second piston. One end of the fork shaft is passed through the first piston and can pass through the retaining ring to resist the second piston.

[0012] As a preferred technical solution of the above-mentioned broken shaft power take-off device, the driving member further includes a second sealing member, and the second sealing member is arranged between the fork shaft and the first piston.

[0013] As a preferred technical solution of the above-mentioned broken shaft power take-off device, the driving member further includes a nut, one end of the fork shaft passes through the first piston and is threadedly connected to the nut, and the nut can be abutted against the second piston.

[0014] As a preferred technical solution of the above-mentioned broken shaft power take-off device, the second piston is provided with an abutment groove, and the nut can be inserted into the abutment groove.

[0015] As an optimal technical solution of the above-mentioned broken shaft power take-off device, the broken shaft power take-off device also includes two bearings, the inner rings of the two bearings are respectively fixed to the two ends of the power take-off shaft, and the outer rings of the two bearings are both fixed to the housing.

[0016] Beneficial effects of the present invention:

[0017] The present invention provides a broken-shaft power take-off device. The broken-shaft power take-off device includes: a housing, a power input shaft, a power output shaft, a power take-off shaft, a power take-off input gear, a power take-off output gear, a gear sleeve, and a driving member. The power input shaft and the power output shaft are coaxially arranged, and both the power input shaft and the power output shaft are rotatably arranged in the housing. The power take-off shaft is rotatably arranged in the housing. The power take-off shaft is parallel to the power input shaft and spaced apart. The power take-off input gear is loosely sleeved on the power input shaft. The power take-off output gear is fixedly connected to the power take-off shaft. The power take-off gear is meshed with the power take-off output gear. The gear sleeve is slidably arranged on the power input shaft. The driving member is transmission-connected to the gear sleeve so that the gear sleeve has a first position, a second position, and a third position. When the gear sleeve is in the first position, the gear sleeve is spline-connected to the power input shaft and the power take-off input gear. When the gear sleeve is in the second position, the gear sleeve is spline-connected to the power input shaft, the power take-off input gear, and the power output shaft. When the gear sleeve is in the third position, the gear sleeve is spline-connected to the power input shaft and the power output shaft. Compared with the existing technology, the broken shaft power take-off device is provided with a set of gear pairs on the power input shaft and the power take-off shaft, which simplifies the device structure and reduces the failure rate; at the same time, the gear sleeve is slidably arranged on the power input shaft. When the gear sleeve is in the first position, the gear sleeve is spline-connected with the power input shaft and the power take-off input gear to realize parking power take-off. When the gear sleeve is in the second position, the gear sleeve is spline-connected with the power input shaft, the power take-off input gear and the power output shaft to realize driving power take-off. When the gear sleeve is in the third position, the gear sleeve is spline-connected with the power input shaft and the power output shaft to realize driving without power take-off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0019] Figure 1 2 is a schematic structural diagram of a broken-axle power take-off device in the first position provided by an embodiment of the present invention;

[0020] Figure 2 2 is a schematic structural diagram of a second position of a broken-axle power take-off device provided by an embodiment of the present invention;

[0021] Figure 3 2 is a schematic structural diagram of the third position of the broken shaft power take-off device provided by an embodiment of the present invention;

[0022] Figure 4 It is a structural cross-sectional view of a driving member provided by an embodiment of the present invention.

[0023] In the picture:

[0024] 1. Housing; 2. Power input shaft; 3. Power output shaft; 4. Power take-off shaft; 5. Power take-off input gear; 6. Power take-off output gear; 7. Gear sleeve; 8. Housing; 81. First air chamber; 82. Second air chamber; 83. Third air chamber; 9. First piston; 10. Second piston; 11. First seal; 12. Fork shaft; 13. Snap ring; 14. Second seal; 15. Nut; 16. Bearing. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0026] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0029] like Figure 1As shown, the present invention provides a broken shaft power take-off device. The broken shaft power take-off device comprises: a housing 1, a power input shaft 2, a power output shaft 3, a power take-off shaft 4, a power take-off input gear 5, a power take-off output gear 6, a gear sleeve 7 and a driving member.

[0030] Specifically, the power input shaft 2 is coaxially arranged with the power output shaft 3, and the power input shaft 2 and the power output shaft 3 are both rotatably arranged in the housing 1, the power take-off shaft 4 is rotatably arranged in the housing 1, the power take-off shaft 4 is parallel to the power input shaft 2 and spaced apart, the power take-off input gear 5 is loosely sleeved on the power input shaft 2, the power take-off output gear 6 is fixedly connected to the power take-off shaft 4, the power take-off input gear 5 is meshed with the power take-off output gear 6, the gear sleeve 7 is slidably arranged on the power input shaft 2, and the driving member is transmission-connected with the gear sleeve 7 so that the gear sleeve 7 has a first position, a second position and a third position. When the gear sleeve 7 is in the first position, the gear sleeve 7 is spline-connected to the power input shaft 2 and the power take-off input gear 5. When the gear sleeve 7 is in the second position, the gear sleeve 7 is spline-connected to the power input shaft 2, the power take-off input gear 5 and the power output shaft 3. When the gear sleeve 7 is in the third position, the gear sleeve 7 is spline-connected to the power input shaft 2 and the power output shaft 3. Compared with the existing technology, the broken shaft power take-off device is provided with a set of gear pairs on the power input shaft 2 and the power take-off shaft 4, which simplifies the device structure and reduces the failure rate; at the same time, the gear sleeve 7 is slidably set on the power input shaft 2. When the gear sleeve 7 is in the first position, the gear sleeve 7 is spline-connected with the power input shaft 2 and the power take-off input gear 5 to achieve parking power take-off. When the gear sleeve 7 is in the second position, the gear sleeve 7 is spline-connected with the power input shaft 2, the power take-off input gear 5 and the power output shaft 3 to achieve driving power take-off. When the gear sleeve 7 is in the third position, the gear sleeve 7 is spline-connected with the power input shaft 2 and the power output shaft 3 to achieve driving without power take-off.

[0031] Optionally, the broken shaft power take-off device further includes a shift fork, the two ends of which are respectively connected to the gear sleeve 7 and the driving member to ensure high efficiency and stability of power transmission.

[0032] Further, if Figure 4 As shown, the broken shaft power take-off device also includes a fork shaft 12, one end of the fork shaft 12 passes through the housing 8 and is connected to the first piston 9, and the other end of the fork shaft 12 is connected to the shift fork. The fork shaft 12 can achieve stable transmission through the linkage with the shift fork.

[0033] Optionally, the driving member includes a housing 8, a first piston 9 and a second piston 10, and an accommodating chamber is provided in the housing 8. The first piston 9 and the second piston 10 are spaced and slidably arranged in the accommodating chamber to divide the accommodating chamber into a first air chamber 81, a second air chamber 82 and a third air chamber 83. One end of the shift fork passes through the housing 8 and is connected to the first piston 9. When the gear sleeve 7 is in the first position, the first air chamber 81 is connected to the inflation device. When the gear sleeve 7 is in the second position, the first air chamber 81 and the third air chamber 83 are both connected to the inflation device. When the gear sleeve 7 is in the third position, the second air chamber 82 is connected to the inflation device. The driving member also includes a retaining ring 13, which is fixed to the inner wall of the accommodating chamber, and the retaining ring 13 is located between the first piston 9 and the second piston 10. One end of the fork shaft 12 is passed through the first piston 9 and can pass through the retaining ring 13 to abut against the second piston 10.

[0034] Specifically, the driving member is a three-position cylinder, such as Figure 1 As shown, when the first air chamber 81 is inflated and the second air chamber 82 and the third air chamber 83 are not inflated, the first piston 9 moves to the left and fits the retaining ring 13. At this time, the gear sleeve 7 is in the first position, and the gear sleeve 7 is connected to the splines of the power take-off input gear 5 and the power input shaft 2, and is not connected to the splines of the power output shaft 3, thereby realizing parking power take-off; Figure 2 As shown, when the first air chamber 81 and the third air chamber 83 are inflated and the second air chamber 82 is not inflated, the second piston 10 moves to the right, the first piston 9 moves to the left, the nut 15 fits with the second piston 10, and the air pressure in the third air chamber 83 is greater than the air pressure in the first air chamber 81. Under the action of the air pressure, the second piston 10 pushes the first piston 9 to the right until the second piston 10 fits with the retaining ring 13. At this time, the gear sleeve 7 is in the second position. At this time, the gear sleeve 7 is connected to the spline of the power input shaft 2, the spline of the power take-off input gear 5 and the spline of the power output shaft 3, realizing driving power take-off; as shown in FIG. Figure 3 As shown, when the second air chamber 82 is inflated and the first air chamber 81 and the third air chamber 83 are not inflated, under the action of air pressure, the first piston 9 moves to the right and fits into the outer shell 8. At this time, the gear sleeve 7 is in the third position, and the gear sleeve 7 is connected to the splines of the power input shaft 2 and the power output shaft 3, but is not connected to the splines of the power take-off input gear 5, so that the vehicle can be driven without taking power.

[0035] Optionally, the driving member further includes a plurality of first seals 11, wherein a portion of the first seals 11 is spaced apart between the inner wall of the accommodating chamber and the first piston 9, and another portion of the first seals 11 is spaced apart between the inner wall of the accommodating chamber and the second piston 10. Specifically, in this embodiment, the driving member is provided with a first seal 11, two first seals 11 are spaced apart between the inner wall of the accommodating chamber and the first piston 9, and one first seal 11 is spaced apart between the inner wall of the accommodating chamber and the second piston 10, to ensure the sealing of the first air chamber 81, the second air chamber 82 and the third air chamber 83, and to prevent the gases in the first air chamber 81, the second air chamber 82 and the third air chamber 83 from communicating with each other. Of course, in some other embodiments, the number of first seals 11 is determined according to actual conditions and will not be repeated here.

[0036] Furthermore, the outer wall of the first piston 9 is provided with two grooves, and the outer wall of the second piston 10 is provided with a groove, and the first seal 11 is provided in the groove to improve the stability of the first seal 11 and prevent the first seal 11 from falling off.

[0037] Optionally, the drive member further includes a second seal 14, which is disposed between the fork shaft 12 and the first piston 9 to improve the sealing between the fork shaft 12 and the first piston 9 and ensure the sealing of the first air chamber 81, the second air chamber 82, and the third air chamber 83. Furthermore, the inner wall of the first piston 9 is provided with a groove, and the second seal 14 is disposed in the groove, thereby improving the stability of the second seal 14 and preventing the second seal 14 from falling off.

[0038] Optionally, the drive member further includes a nut 15. One end of the fork shaft 12 passes through the first piston 9 and is threadedly connected to the nut 15. The nut 15 can abut against the second piston 10, thereby improving the stability of the connection between the fork shaft 12 and the first piston 9. At the same time, the nut 15 is protruded from the first piston 9. The nut 15 abuts against the second piston 10, enabling the second piston 10 to push the first piston 9 to move rightward. Furthermore, the right end surface of the second piston 10 is provided with an abutment groove, into which the nut 15 can be inserted, so that the force direction of the fork shaft 12 is along the axial direction of the fork shaft 12, preventing the fork shaft 12 from deflecting.

[0039] Optionally, the broken-shaft PTO device further includes two bearings 16, the inner rings of which are fixed to the ends of the PTO shaft 4, and the outer rings of which are fixed to the housing 1. This can reduce the friction of the PTO shaft 4 and ensure smooth rotation of the PTO shaft 4. Furthermore, bearings 16 are provided between the housing 1 and both the power input shaft 2 and the power output shaft 3.

[0040] Furthermore, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A broken shaft power take-off device, characterized in that: include: A housing (1), a power input shaft (2), a power output shaft (3), a power take-off shaft (4), a power take-off input gear (5), a power take-off output gear (6), a gear sleeve (7) and a driving member, wherein the power input shaft (2) and the power output shaft (3) are coaxially arranged, and the power input shaft (2) and the power output shaft (3) are both rotatably arranged in the housing (1), the power take-off shaft (4) is rotatably arranged in the housing (1), the power take-off shaft (4) and the power input shaft (2) are parallel and spaced apart, the power take-off input gear (5) is loosely sleeved on the power input shaft (2), the power take-off output gear (6) is fixedly connected to the power take-off shaft (4), the power take-off input gear (5) and the power take-off output gear ( 6) is engaged, the gear sleeve (7) is slidably arranged on the power input shaft (2), and the driving member is transmission-connected with the gear sleeve (7) so that the gear sleeve (7) has a first position, a second position and a third position. When the gear sleeve (7) is located at the first position, the gear sleeve (7) is spline-connected with the power input shaft (2) and the power take-off input gear (5). When the gear sleeve (7) is located at the second position, the gear sleeve (7) is spline-connected with the power input shaft (2), the power take-off input gear (5) and the power output shaft (3). When the gear sleeve (7) is located at the third position, the gear sleeve (7) is spline-connected with the power input shaft (2) and the power output shaft (3).

2. A broken shaft power take-off device according to claim 1, characterized in that: The broken shaft power take-off device also includes a shift fork, with two ends of the shift fork respectively connected to the gear sleeve (7) and the driving member.

3. A broken shaft power take-off device according to claim 2, characterized in that: The driving member comprises a housing (8), a first piston (9) and a second piston (10); an accommodating chamber is provided in the housing (8); the first piston (9) and the second piston (10) are spaced and slidably arranged in the accommodating chamber to divide the accommodating chamber into a first air chamber (81), a second air chamber (82) and a third air chamber (83); one end of the shift fork passes through the housing (8) and is connected to the first piston (9); when the gear sleeve (7) is in the first position, the first air chamber (81) is communicated with the inflation device; when the gear sleeve (7) is in the second position, the first air chamber (81) and the third air chamber (83) are both communicated with the inflation device; when the gear sleeve (7) is in the third position, the second air chamber (82) is communicated with the inflation device.

4. A broken shaft power take-off device according to claim 3, characterized in that: The driving member further comprises a plurality of first sealing members (11), wherein a portion of the first sealing members (11) is spaced apart between the inner wall of the accommodating chamber and the first piston (9), and another portion of the first sealing members (11) is spaced apart between the inner wall of the accommodating chamber and the second piston (10).

5. The broken shaft power take-off device according to claim 3, characterized in that: The broken shaft power take-off device further comprises a fork shaft (12), one end of the fork shaft (12) passes through the housing (8) and is connected to the first piston (9), and the other end of the fork shaft (12) is connected to the shift fork.

6. A broken shaft power take-off device according to claim 5, characterized in that: The driving member further includes a snap ring (13), which is fixed to the inner wall of the accommodating chamber and is located between the first piston (9) and the second piston (10). One end of the fork shaft (12) is passed through the first piston (9) and can pass through the snap ring (13) to abut against the second piston (10).

7. A broken shaft power take-off device according to claim 6, characterized in that: The driving member further comprises a second sealing member (14), which is arranged between the fork shaft (12) and the first piston (9).

8. The broken shaft power take-off device according to claim 6, characterized in that: The driving member further comprises a nut (15), one end of the fork shaft (12) passes through the first piston (9) and is threadedly connected to the nut (15), and the nut (15) can abut against the second piston (10).

9. The broken shaft power take-off device according to claim 8, characterized in that: The second piston (10) is provided with an abutment groove, and the nut (15) can be inserted into the abutment groove.

10. A broken shaft power take-off device according to any one of claims 1 to 9, characterized in that: The broken shaft power take-off device further comprises two bearings (16), the inner rings of the two bearings (16) are respectively fixed to the two ends of the power take-off shaft (4), and the outer rings of the two bearings (16) are both fixed to the housing (1).

Images