Sandwich type power takeoff

Abstract

The utility model discloses a sandwich type power takeoff which comprises a clutch shell, a box body, a main shaft, an input gear, a release bearing, a release claw, a release rocker arm, a return spring, an intermediate gear shaft, an output gear, an output shaft, a sliding gear sleeve and a neutral gear control assembly. Through the direct meshing design of the input gear, the main shaft and the intermediate gear, it is ensured that power transmission is efficient, no obvious energy loss exists, a driver can conveniently control connection and disconnection of power by operating the separation claw and the separation rocker arm, and different work requirements are met; a return spring ensures that the separation claw can return automatically when not in operation, the risk of misoperation is reduced, and through the matched design of a sliding gear sleeve and a neutral gear control assembly, power is allowed to be cut off safely when power output is not needed, and the flexibility of the system is improved; and a cooling pump end cover and an oil temperature cooling water circulation interface are designed, so that the heat dissipation capability of the system is enhanced, and the stability during high-load work is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power take-offs, in particular to a sandwich-type power take-off. Background Art

[0002] The sandwich PTO is a crucial transmission component. Specialized vehicles requiring additional power, such as fire trucks, cleaning vehicles, road sweepers, snow plows, cement mixers, and refrigeration trucks, all rely on a sandwich PTO to obtain power.

[0003] Currently, Chinese patent application number CN201220733122.8 discloses a sandwich-type power take-off (PTO) comprising a front input shaft, a rear input shaft, a driving gear, a driven gear, a needle roller bearing, a transmission shaft, a front bearing, a rear bearing, and a housing. The rear bearing is mounted on the rear end of the rear input shaft; the two needle roller bearings are fitted with a driving gear, which meshes with the driven gear. The rear bearing is fixedly connected to a transition plate. A gear holder is mounted on the distal end of the front and rear input shafts and is fixedly connected to the holder. The gear holder is fitted with a gear sleeve and is slidably connected to the sleeve via internal and external splines. A spline segment is provided on the cylindrical driving gear near the gear holder. The spline segment on the cylindrical driving gear matches the splines on the gear holder in size and position on the shaft. A shift fork is also connected to the sleeve, which is movably connected to the sleeve.

[0004] However, the sandwich-type power take-off in the existing technology is not convenient for quickly switching the power state, the response during switching is slow and the operation is cumbersome, and it is inconvenient to monitor the position status of the sliding gear sleeve. The response capability in the fault state is insufficient, affecting the safety of the system use. Utility Model Content

[0005] The purpose of the present utility model is to provide a sandwich-type power take-off to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sandwich-type power take-off, comprising a clutch housing, a housing, a main shaft, an input gear, a release bearing, a release claw, a release rocker arm, a return spring, an intermediate gear shaft, an output gear, an output shaft, a sliding gear sleeve and a neutral control assembly, wherein the side of the clutch housing is installed with a housing, the bottom side of the interior of the housing is penetrated by the main shaft, the middle side of the outer surface of the main shaft is provided with an input gear, and the right side of the main shaft is provided with a drive gear, the left end of the main shaft is installed with a release bearing, the outside of the release bearing is provided with a release claw and a release rocker arm, and the top sides of the release claw and the release rocker arm are connected to the housing through a return spring, the top side of the input gear is meshed with an intermediate gear shaft, the top side of the intermediate gear shaft is meshed with the output gear, the output shaft is rotated through the interior of the output gear, and the middle part of the outer surface of the output shaft is slidably meshed with a sliding gear sleeve, the top side of the sliding gear sleeve is provided with a neutral control assembly, and the neutral control assembly is installed on the top side of the interior of the housing.

[0007] Preferably, an upper cover plate and a lower cover plate are respectively provided on the upper and lower sides of the box body, and two lifting rings are installed on the top side of the upper cover plate.

[0008] Preferably, the output rear cooling pump end cover and the output front cooling pump end cover are respectively provided on the left and right sides of the output shaft, and the output rear cooling pump end cover and the output front cooling pump end cover are respectively provided on the left and right sides of the box body.

[0009] Preferably, an oil temperature cooling water circulation interface is provided on the bottom side of the front portion of the box body, and an oil pipe elbow joint and an oil pipe straight joint are installed on the output rear cooling pump end cover and the output front cooling pump end cover.

[0010] Preferably, the input gear is provided with 50 teeth, the intermediate gear shaft is provided with 48 teeth, and the output gear is provided with 37 teeth.

[0011] Preferably, the neutral control assembly includes a cylinder fastened to the right side of the box body, a fork shaft connected to the left output end of the cylinder, a positioning seat arranged on the left side of the fork shaft, a fork frame fastened to the right side of the outer surface of the fork shaft, a first spring arranged on the left side of the fork frame, a hexagonal bolt fastened to the middle side of the top of the positioning seat, a second spring arranged at the bottom of the hexagonal bolt, a steel ball installed on the bottom side of the second spring, and an induction switch inserted into the left side of the positioning seat. The positioning seat is fixed through the top left side of the box body, the bottom of the fork frame is connected to the sliding gear sleeve, the left side of the first spring abuts against the positioning seat, and the bottom of the steel ball contacts the fork shaft.

[0012] Preferably, two annular grooves are provided on the left side of the outer surface of the fork shaft. When the annular groove on the right side is in contact with the steel ball, the interior of the sliding sleeve is engaged with the output gear, and when the annular groove on the left side is in contact with the steel ball, the interior of the sliding sleeve is disengaged from the output gear.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model ensures efficient power transmission without obvious energy loss through the direct meshing design of the input gear, main shaft and intermediate gear, and the driver can easily control the connection and disconnection of power by operating the separation claw and the separation rocker arm to adapt to different work requirements; the return spring ensures that the separation claw can automatically return when not in operation, reducing the risk of misoperation, and the coordinated design of the sliding gear sleeve and the neutral control component allows the power to be safely cut off when power output is not required, thereby increasing the flexibility of the system; the design of the cooling pump end cover and the oil temperature cooling water circulation interface enhances the heat dissipation capacity of the system and ensures stability during high-load operation.

[0015] The utility model can quickly switch between power transmission and neutral state through simple cylinder action to meet different working requirements. The design of the first spring and the second spring ensures that in the event of an operational error or failure, the system can automatically reset to a safe state to reduce risks. At the same time, the state of the sliding gear sleeve can be monitored in real time, feedback can be provided, and the accuracy and reliability of the operation can be ensured, which is convenient for the operator to adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a structural diagram of the neutral gear control assembly of the present utility model.

[0018] In the figure: clutch housing 1, housing 2, main shaft 3, input gear 4, release bearing 5, release claw, release rocker arm 6, return spring 7, intermediate gear shaft 8, output gear 9, output shaft 10, sliding sleeve 11, neutral control assembly 12, output rear cooling pump end cover 13, output front cooling pump end cover 14, upper cover 21, lower cover 22, lifting ring 23, cylinder 121, shift fork shaft 122, locating seat 123, shift fork frame 124, first spring 125, hexagonal bolt 126, second spring 127, steel ball 128, induction switch 129. DETAILED DESCRIPTION

[0019] In order to further explain the technical solution of the present invention, specific embodiments are described in detail below.

[0020] See also Figure 1The utility model provides a sandwich-type power take-off, including a clutch housing 1, a case 2, a main shaft 3, an input gear 4, a release bearing 5, a release claw, a release rocker arm 6, a return spring 7, an intermediate gear shaft 8, an output gear 9, an output shaft 10, a sliding gear sleeve 11 and a neutral control assembly 12. The case 2 is installed on the side of the clutch housing 1 to provide an overall support structure to protect the internal components. The main shaft 3 is penetrated by the bottom side of the case 2 to transmit power. The input gear 4 is provided on the middle side of the main shaft 3, and a drive gear is provided on the right side of the main shaft 3 to receive power from the engine. A release bearing 5 is installed on the left end of the main shaft 3, and a release claw and a release rocker arm 6 are installed on the outside of the release bearing 5. The top side of the release claw and the release rocker arm 6 is connected to the case 2 through a return spring 7 to support the movement of the release claw and the release rocker arm through the release bearing 5 and control the power. The connection and disconnection of the gears are realized, and the return spring 7 ensures that the separation claw automatically returns to the disengaged state when not operated. The top side of the input gear 4 is meshed with an intermediate gear shaft 8, and the top side of the intermediate gear shaft 8 is meshed with the output gear 9. An output shaft 10 is rotated inside the output gear 9 to transmit power to an external device. The input gear 4 is provided with 50 teeth, the intermediate gear shaft 8 is provided with 48 teeth, and the output gear 9 is provided with 37 teeth. A sliding gear sleeve 11 is slidably engaged with the middle part of the outer surface of the output shaft 10, and a neutral control component 12 is provided on the top side of the sliding gear sleeve 11. The neutral control component 12 is installed on the top side of the interior of the housing 2 to change the position state of the sliding gear sleeve 11 through the neutral control component 12, allowing the output shaft to slide and mesh under different working conditions, so that the meshing of the sliding gear sleeve 11 and the output shaft can be cut off to achieve the neutral state, thereby controlling the start or disable of the output;

[0021] Among them, the upper and lower sides of the box body 2 are respectively provided with an upper cover plate 21 and a lower cover plate 22, two lifting rings 23 are installed on the top side of the upper cover plate 21, and the left and right sides of the output shaft 10 are respectively provided with an output rear cooling pump end cover 13 and an output front cooling pump end cover 14, and the output rear cooling pump end cover 13 and the output front cooling pump end cover 14 are respectively arranged on the left and right sides of the box body 2, an oil temperature cooling water circulation interface is provided on the bottom side of the front of the box body 2, and the output rear cooling pump end cover 13 and the output front cooling pump end cover 14 are both equipped with oil pipe elbows and oil pipe straight joints, which enhance the heat dissipation capacity of the system and ensure stability during high-load operation.

[0022] See also Figure 1 and Figure 2The present invention provides a sandwich-type power take-off, wherein the neutral control assembly 12 comprises a cylinder 121 fastened to the right side of the housing 2 and responsible for generating a control force, a fork shaft 122 connected to the left output end of the cylinder 121 and serving as an intermediary for transmitting a control action, a positioning seat 123 arranged on the left side of the fork shaft 122, a fork frame 124 fastened to the right side of the outer surface of the fork shaft 122, a first spring 125 arranged on the left side of the fork frame 124 and capable of providing elastic force to maintain the initial position of the fork frame 124, a hexagonal bolt 126 fastened to the middle side of the top of the positioning seat 123, a second spring 127 arranged at the bottom of the hexagonal bolt 126, a steel ball 128 installed on the bottom side of the second spring 127, and a steel ball 128 inserted into the left side of the positioning seat 123. The internal induction switch 129 monitors the position of the fork shaft 122 and provides a feedback signal. The positioning seat 123 is fixed to the top left side of the box body 2. The bottom of the fork frame 124 is connected to the sliding gear sleeve 11. Under the action of the fork frame 124, the sliding gear sleeve 11 is driven to move laterally to control the activation or cutoff of power transmission. The left side of the first spring 125 abuts against the positioning seat 123, and the bottom of the steel ball 128 contacts the fork shaft 122. The dynamic balance of the fork shaft 122 is improved through the cooperation of the second spring 127 and the steel ball 128. Two annular grooves are provided on the left side of the outer surface of the fork shaft 122 to play a positioning role when the cylinder 121 pushes the fork shaft 122 to different positions, thereby ensuring the dynamic balance effect.

[0023] When the cylinder 121 pushes the shift fork shaft 122 to move to the left so that the annular groove on the right side contacts and engages with the steel ball 128, the interior of the sliding gear sleeve 11 engages with the output gear 9, and the power transmission is activated, so that the power entering the main shaft 3 passes through the input gear 4, the intermediate gear shaft 8 and the output gear 9 and then is transmitted to the external device from the output shaft 10; when the cylinder 121 pushes the shift fork shaft 122 to move to the right so that the annular groove on the left side contacts and engages with the steel ball 128, the interior of the sliding gear sleeve 11 disengages from the output gear 9, the power transmission is cut off, and the gear enters the neutral state.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A sandwich-type power take-off, comprising a clutch housing (1), characterized in that: The clutch housing (1) is provided with a housing (2) on its side, a main shaft (3) is provided on the bottom side of the housing (2), an input gear (4) is provided on the middle side of the outside of the main shaft (3), and a driving gear is provided on the right side of the main shaft (3), a release bearing (5) is provided on the left end of the main shaft (3), a release claw and a release rocker arm (6) are provided on the outside of the release bearing (5), and the top sides of the release claw and the release rocker arm (6) are connected to the housing (2) through a return spring (7), an intermediate gear shaft (8) is meshed on the top side of the input gear (4), and the top side of the intermediate gear shaft (8) is meshed with the output gear (9), an output shaft (10) is provided inside the output gear (9) for rotation, and a sliding gear sleeve (11) is slidably meshed on the middle part of the outer surface of the output shaft (10), a neutral control component (12) is provided on the top side of the sliding gear sleeve (11), and the neutral control component (12) is installed on the top side of the housing (2).

2. The sandwich-type power take-off according to claim 1, characterized in that: An upper cover plate (21) and a lower cover plate (22) are respectively provided on the upper and lower sides of the box body (2), and two lifting rings (23) are installed on the top side of the upper cover plate (21).

3. The sandwich-type power take-off according to claim 1, characterized in that: An output rear cooling pump end cover (13) and an output front cooling pump end cover (14) are respectively provided on the left and right sides of the output shaft (10), and the output rear cooling pump end cover (13) and the output front cooling pump end cover (14) are respectively provided on the left and right sides of the box body (2).

4. The sandwich-type power take-off according to claim 3, characterized in that: An oil temperature cooling water circulation interface is provided on the bottom side of the front portion of the box body (2), and an oil pipe elbow and an oil pipe straight joint are installed on the output rear cooling pump end cover (13) and the output front cooling pump end cover (14).

5. The sandwich-type power take-off according to claim 1, characterized in that: The input gear (4) is provided with 50 teeth, the intermediate gear shaft (8) is provided with 48 teeth, and the output gear (9) is provided with 37 teeth.

6. The sandwich-type power take-off according to claim 1, characterized in that: The neutral control assembly (12) includes a cylinder (121) fastened to the right side of the housing (2), a fork shaft (122) connected to the left output end of the cylinder (121), a positioning seat (123) arranged on the left side of the fork shaft (122), a fork frame (124) fastened to the right side of the outer surface of the fork shaft (122), a first spring (125) arranged on the left side of the fork frame (124), a hexagonal bolt (126) fastened to the middle side of the top of the positioning seat (123), and a hexagonal bolt (127) arranged on the left side of the hexagonal bolt (127). 6) A second spring (127) at the bottom, a steel ball (128) mounted on the bottom side of the second spring (127), and an induction switch (129) inserted into the left side of the positioning seat (123), wherein the positioning seat (123) is fixed through the top of the left side of the box body (2), the bottom of the fork frame (124) is connected to the sliding gear sleeve (11), the left side of the first spring (125) is in contact with the positioning seat (123), and the bottom of the steel ball (128) is in contact with the fork shaft (122).

7. The sandwich-type power take-off according to claim 6, characterized in that: Two annular grooves are provided on the left side of the outer surface of the shift fork shaft (122). When the annular groove on the right side is in contact with the steel ball (128), the interior of the sliding gear sleeve (11) is engaged with the output gear (9). When the annular groove on the left side is in contact with the steel ball (128), the interior of the sliding gear sleeve (11) is disengaged from the output gear (9).

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