CN219618905U

CN219618905U - Get power take-off of car power

Info

Publication number: CN219618905U
Application number: CN202320101408.2U
Authority: CN
Inventors: 庞涛; 姚凌; 黄一峰
Original assignee: Zhuzhou Gear Co Ltd
Current assignee: Zhuzhou Gear Co Ltd
Priority date: 2023-02-02
Filing date: 2023-02-02
Publication date: 2023-09-01
Anticipated expiration: 2033-02-02

Abstract

The utility model discloses a power take-off device for obtaining automobile power, which comprises an output shaft, an internal spline sleeve, a shifting fork, a cylinder and a piston, wherein an external spline I is arranged at the input end of the output shaft, the internal spline sleeve is sleeved on the external spline I and can axially slide on the external spline I, one end of the shifting fork is clamped in a clamping groove at the periphery of the internal spline sleeve, the other end of the shifting fork is connected with the piston through a push rod, the piston is positioned in the cylinder and can reciprocally slide in the cylinder, a power take-off air pressure space and a release air pressure space are respectively arranged at two ends of the cylinder, when the power take-off air pressure space is pressurized, the release air pressure space is depressurized, and when the air pressure take-off air pressure space is pressurized, the power take-off air pressure space is depressurized. The advantages are that: the risk that the internal spline housing axially slides and breaks away from the external spline II of the power shaft under the working condition is greatly reduced; the air pressure for pushing the piston to move can be reduced by more than half compared with the traditional scheme; the power take-off device is in a state with an indicator light which is lightened, so that the power take-off device is convenient for an operator to recognize.

Description

Get power take-off of car power

Technical Field

The utility model relates to a power take-off device for obtaining automobile power, and belongs to the technical field of power transmission.

Background

The automobile power (provided by a fuel engine or provided by a motor) is mainly used for driving and driving an air conditioner by an automobile, and the power provided by the fuel engine also provides a part of power for a generator so as to meet the requirement of automobile battery power storage for automobile starting and vehicle-mounted electric appliances.

With the continuous development of the automobile industry, part of special vehicles have special functions, such as lifting, pumping, tipping bucket and the like, and also have the functions of compressor operation compression, oil circulation pump pressure and the like in external refrigeration equipment for realizing oil cooling and lubrication of a gearbox, and the realization of the functions needs to provide power for an executing mechanism of the special vehicles, and the power acquisition modes are generally to directly distribute the power to the automobile. Thus, a power take-off device is added to the engine or the gearbox or the transfer case to transmit power to the actuator. The power take-off device can be connected with or disconnected from power as required.

The traditional power take-off is that an output shaft is arranged on the power take-off, an external spline I is arranged at one end of the output shaft, an internal spline housing matched with the external spline I is arranged, and the internal spline housing has a certain length and can axially slide on the external spline I. The automobile is provided with a power shaft for transmitting automobile power, the power shaft and one end of the output shaft with the external spline are coaxially arranged adjacently, the other end of the power shaft adjacent to the output shaft is provided with the external spline II, when the internal spline sleeve is sleeved with the external spline II, the external spline II of the power shaft slides to the internal spline sleeve, and is also sleeved with the external spline II, the power shaft on the automobile is connected with the output shaft of the power taking device through the internal spline sleeve, and the output shaft of the power taking device can synchronously rotate with the power shaft on the power taking automobile through the internal spline sleeve, so that the device obtains output power. The sliding of the internal spline housing is pushed by the piston through the shifting fork. The piston is pushed by the traditional force taking device, the pneumatic pressure is only applied in the cylinder at one end of the piston, and the reset of the piston depends on the reset spring. The disadvantage of this arrangement is that the air pressure requirement is higher, because the resistance of the reset spring is overcome when pushing the piston, and when the piston is pushed to be matched with the external spline II of the power shaft, the piston is required to be subjected to stronger reset force of the reset spring, if the air cylinder is out of pressure, the internal spline housing can slide towards the output shaft direction of the power take-off device to be separated from the sleeve connection with the power shaft, so that the power take-off device fails in power take-off.

Disclosure of Invention

The utility model aims to solve the technical problems that: provided is a power take-off device capable of stably obtaining automobile power.

The utility model comprises the following steps:

the utility model provides a get power take-off of car power, including output shaft, internal spline housing, shift fork, cylinder and piston, the input of output shaft has external spline first, internal spline housing cover is on external spline first and can do the axial slip on external spline first, shift fork one end block is in the draw-in groove of internal spline housing periphery, the other end passes through push rod and piston connection, the piston is located the cylinder and can do reciprocating slip in the cylinder, have respectively at the both ends of cylinder and get the atmospheric pressure space and throw off the atmospheric pressure space, when getting the atmospheric pressure space pressure boost, throw off the atmospheric pressure space pressure release, when throw off the atmospheric pressure space boost, get the atmospheric pressure space pressure release.

Further, a power taking air passage and a release air passage are respectively arranged on the shell of the inner wall of the power taking air pressure space and the shell of the inner wall of the release air pressure space, the power taking air passage is used for bearing the air intake and the pressure relief of the power taking air pressure space, and the release air passage is used for releasing the air intake and the pressure relief of the air pressure space.

Further, be equipped with the pinhole on the output shaft of external spline place section, be equipped with the elastic pin that can radially pop out an external spline surface in the pinhole, internal spline housing inner wall is equipped with the power state spacing groove of circumference, the elastic pin can slide into power state spacing inslot, carries out the axial spacing to the internal spline housing, power state spacing groove has the hypotenuse that makes the opening width be greater than tank bottom width, and the internal spline housing is under axial external force effect, and the elastic pin can follow hypotenuse roll-off power state spacing groove.

Further, the inner wall of the inner spline housing is also provided with a circumferential disengagement state limiting groove, the elastic pin can slide into the disengagement state limiting groove to axially limit the inner spline housing, the disengagement state limiting groove is provided with a bevel edge with an opening width larger than the width of the groove bottom, and the elastic pin can slide out of the disengagement state limiting groove along the bevel edge under the action of axial external force.

Further, the elastic pin comprises a pressure spring and a sliding ball, the pressure spring is arranged in the pin hole, the sliding ball presses the pressure spring at the orifice of the pin hole, and the pressure spring is in a precompressed state.

Further, the elastic pins are three, and the axes of the pin holes of the three elastic pins are in the same cross section of the output shaft at equal angles.

Further, the push rod penetrates the piston to extend towards the direction of the output end of the output shaft, a switch groove is formed in the extending section, an indication switch is correspondingly arranged in the sliding area of the switch groove, an elastic button which can slide into the switch groove from the peripheral surface of the push rod and slide out of the switch groove to the peripheral surface of the push rod is arranged on the indication switch, when the elastic button slides into the switch groove, the power taking state indicator lamp is turned off, when the elastic button slides out of the peripheral surface of the push rod, the power taking state indicator lamp is turned on, and the power taking state indicator lamp is turned on.

Advantageous effects

1. According to the technical scheme, the internal spline housing is not subjected to manual axial force under the working condition, so that the risk that the internal spline housing is separated from the external spline II of the power shaft under the working condition is greatly reduced.

2. Through spacing setting, can further guarantee that the internal spline housing can stably stay in the state of disengaging or getting the power state.

3. When the piston pushes the inner spline housing to slide towards the outer spline housing, the elastic resistance of the reset spring arranged in the traditional mode is not required to be overcome, so that the technical scheme of the utility model can reduce the air pressure for pushing the piston to move by more than half compared with the traditional scheme.

4. The power take-off device is in a state with an indicator light which is lightened, so that the power take-off device is convenient for an operator to recognize.

Drawings

FIG. 1 is a schematic cross-sectional view of the force take-off device (parts not being treated in cross-section);

FIG. 2 is an enlarged view of a portion of FIG. 1, mainly showing the configuration of the region of the female spline housing;

fig. 3 is a partial enlarged view of fig. 1, mainly showing the structure of the area where the cylinder is located.

In the figure: 1. an output shaft; 101. an external spline I; 102. a pin hole; 2. a power shaft; 201. an external spline II; 3. a shifting fork; 4. a push rod; 5. a cylinder; 501. a force taking air pressure space; 5011. a power taking airway; 502. disconnecting the air pressure space; 5021. disconnecting the airway; 6. a piston; 7. an internal spline housing; 701. a force-taking state limit groove; 702. a disengagement state limit groove; 8. an elastic pin; 801. a pressure spring; 802. a sliding ball; 9. an indication switch; 901. an elastic button; 10. and a switch groove.

Description of the embodiments

The utility model is further described below with reference to the accompanying drawings:

as shown in fig. 1-3, a power take-off device for obtaining automobile power comprises an output shaft 1, an inner spline housing 7, a shifting fork 3, a cylinder 5 and a piston 6, wherein an outer spline housing 101 is arranged at the input end of the output shaft 1, the inner spline housing 7 is sleeved on the outer spline housing 101 and can axially slide on the outer spline housing 101, one end of the shifting fork 3 is clamped in a clamping groove at the periphery of the inner spline housing 7, the other end of the shifting fork is connected with the piston 6 through a push rod 4, the piston 6 is positioned in the cylinder 5 and can reciprocally slide in the cylinder 5, a power take-off air pressure space 501 and a release air pressure space 502 are respectively arranged at two ends of the cylinder 5, when the power take-off air pressure space 501 is pressurized, the release air pressure space 502 is depressurized, and when the release air pressure space 502 is pressurized. Before assembly and application, a power shaft 2 connected with an automobile transmission part is arranged on an automobile in advance, an external spline II 201 is arranged at the output end of the power shaft 2, when the power taking device is assembled, the output shaft 1 and the power shaft 2 are coaxially and adjacently arranged, and the end part of the external spline I101 of the output shaft 1 is adjacent to the end part of the external spline II 201 of the power shaft 2; the output end of the output shaft 1 is connected with an actuating mechanism. During application, the power taking air space 501 is pressurized, the release air pressure space 502 is depressurized, the piston 6 slides towards the release air pressure space 502, the internal spline sleeve 7 is pushed from the first external spline 101 of the output shaft 1 to the second external spline 201 of the power shaft 2 through the push rod 4 and the shifting fork 3 until one end of the internal spline sleeve 7 is sleeved with the second external spline 201, and the other end of the internal spline sleeve is still sleeved with the first external spline 101, so that the output shaft 1 is connected with the power shaft 2 and can synchronously rotate, and the power taking device can acquire power to an automobile and transmit the power to an executing mechanism. When the operation of the actuating mechanism is stopped as required, the release air pressure space 502 is pressurized, the power taking air space 501 is depressurized, the piston 6 slides towards the power taking air space 501, the inner spline housing 7 slides towards the outer spline I101 from the sleeving position of the outer spline II 201 of the power shaft 2 through the push rod 4 and the shifting fork 3, and the inner spline housing 7 is completely released from the power shaft 2, so that the power taking device cuts off the power transmission with the automobile. The following arrangement is compared with the traditional mode: 1. the traditional mode is that when the inner spline housing 7 is sleeved with the outer spline second 201 of the power shaft 2 to perform power transmission, the piston 6 is always subjected to stronger restoring force of the restoring spring, when the air pressure of the power taking air space 501 is insufficient to resist, the inner spline housing 7 has the risk of being separated from the outer spline second 201 under the working condition, and the technical scheme of the utility model can not lead the inner spline housing 7 under the working condition to be subjected to the axial force which is manually set and enables the inner spline housing 7 to slide, so that the risk of being separated from the outer spline second 201 under the working condition of the inner spline housing 7 is greatly reduced; 2. when the piston 6 pushes the inner spline housing 7 to slide towards the outer spline II 201, the elastic resistance of the reset spring arranged in the traditional mode is not required to be overcome, so that the technical scheme of the utility model can reduce the air pressure for pushing the piston to move by more than half compared with the traditional scheme.

The casing of the inner wall of the power taking air space 501 and the release air space 502 are respectively provided with a power taking air passage 5011 and a release air passage 5021, wherein the power taking air passage 5011 is used for bearing the air intake and the pressure release of the power taking air space 501, and the release air passage 5021 is used for releasing the air intake and the pressure release of the air space 502.

The output shaft 1 of the section where the first external spline 101 is arranged is provided with a pin hole 102, an elastic pin 8 capable of radially ejecting out of the surface of the first external spline 101 is arranged in the pin hole 102, the inner wall of the internal spline housing 7 is provided with a circumferential force taking state limiting groove 701, when the force taking state limiting groove 701 approaches the elastic pin 8 along with the internal spline housing 7 to the same cross section of the output shaft 1 with the elastic pin 8, the elastic pin 8 can slide into the force taking state limiting groove 701, the internal spline housing 7 is axially limited, and the internal spline housing 7 is prevented from being separated from the second external spline 201 under the working condition. The force taking state limiting groove 701 is provided with a bevel edge with an opening width larger than the groove bottom width, and the elastic pin 8 can slide out of the force taking state limiting groove 701 along the bevel edge under the action of axial external force (pushing of a piston) by the internal spline housing 7.

The inner wall of the inner spline housing 7 is also provided with a circumferential disengagement state limiting groove 702, and the elastic pin 8 can slide into the disengagement state limiting groove 702 to axially limit the inner spline housing 7, so that the inner spline housing 7 is kept in a disengagement state with the outer spline II of the power shaft. The disengagement state limiting groove 702 is provided with a bevel edge with an opening width larger than the groove bottom width, and the elastic pin 8 can slide out of the disengagement state limiting groove 702 along the bevel edge under the action of axial external force of the internal spline housing 7.

The elastic pin 8 comprises a pressure spring 801 and a sliding ball 802, the pressure spring 801 is arranged in the pin hole 102, the sliding ball 802 presses the pressure spring 801 at the orifice position of the pin hole 102, the pressure spring 801 is in a precompressed state, and the sliding ball 802 can slide into or out of the release state limiting groove 702 and the power taking state limiting groove 701 more easily.

The elastic pins 8 are three, and the axes of the pin holes 102 of the three elastic pins 8 are positioned on the same cross section of the output shaft 1 at equal angles, so that the internal spline housing 7 can be balanced to receive axial resistance.

The push rod 4 passes through the piston 6 and extends towards the direction of the output end of the output shaft 1, a switch groove 10 is arranged at the extending section, an indication switch 9 is correspondingly arranged in the sliding area of the switch groove 10, an elastic button 901 which can slide into the switch groove 10 from the peripheral surface of the push rod 4 and can slide out of the switch groove 10 to the peripheral surface of the push rod 4 is arranged on the indication switch 9, the disconnection state indicator lamp is switched on when the elastic button 901 slides into the switch groove 10, the power taking state indicator lamp is switched off when the elastic button 901 slides into the switch groove 10, and the power taking state indicator lamp is switched on when the elastic button 901 slides out to the peripheral surface of the push rod 4 and is lightened.

The above embodiments are only for the purpose of more clearly describing the present utility model and should not be construed as limiting the scope of the present utility model, and any equivalent modifications should be construed as falling within the scope of the present utility model.

Claims

1. The utility model provides a get power take-off of car power, including output shaft (1), internal spline housing (7), shift fork (3), cylinder (5) and piston (6), the input of output shaft (1) has external spline one (101), internal spline housing (7) cover is on external spline one (101) and can do axial slip on external spline one (101), in the draw-in groove of internal spline housing (7) periphery of shift fork (3) one end block, the other end is connected with piston (6) through push rod (4), piston (6) are located cylinder (5) and can do reciprocating slip in cylinder (5), its characterized in that: the two ends of the air cylinder (5) are respectively provided with a power taking air space (501) and a release air pressure space (502), when the power taking air space (501) is pressurized, the release air pressure space (502) is depressurized, and when the release air pressure space (502) is pressurized, the power taking air space (501) is depressurized.

2. The power take-off for obtaining motive power of an automobile of claim 1, wherein: and a power taking air channel (5011) and a release air channel (5021) are respectively arranged on the shell of the inner wall of the power taking air space (501) and the release air pressure space (502), the power taking air channel (5011) is used for bearing the air inlet and the pressure release of the power taking air space (501), and the release air channel (5021) is used for releasing the air inlet and the pressure release of the air pressure space (502).

3. The power take-off for obtaining motive power of an automobile of claim 1, wherein: the output shaft (1) of the section where the external spline (101) is located is provided with a pin hole (102), an elastic pin (8) capable of radially ejecting the surface of the external spline (101) is arranged in the pin hole (102), the inner wall of the internal spline housing (7) is provided with a circumferential force taking state limiting groove (701), the elastic pin (8) can slide into the force taking state limiting groove (701) to axially limit the internal spline housing (7), the force taking state limiting groove (701) is provided with a bevel edge which enables the opening width to be larger than the width of the groove bottom, and the elastic pin (8) can slide out of the force taking state limiting groove (701) along the bevel edge under the action of axial external force.

4. A power take-off for obtaining motive power of an automobile as defined in claim 3, wherein: the inner wall of the inner spline housing (7) is further provided with a circumferential disengagement state limiting groove (702), the elastic pin (8) can slide into the disengagement state limiting groove (702), the inner spline housing (7) is axially limited, the disengagement state limiting groove (702) is provided with a bevel edge with an opening width larger than the width of the groove bottom, and the elastic pin (8) can slide out of the disengagement state limiting groove (702) along the bevel edge under the action of axial external force.

5. The power take-off for obtaining motive power of an automobile as claimed in claim 3 or 4, wherein: the elastic pin (8) comprises a pressure spring (801) and a sliding ball (802), the pressure spring (801) is arranged in the pin hole (102), the sliding ball (802) presses the pressure spring (801) at the position of the orifice of the pin hole (102), and the pressure spring (801) is in a precompressed state.

6. The power take-off for obtaining motive power of an automobile as claimed in claim 3 or 4, wherein: the elastic pins (8) are three, and the axes of the pin holes (102) of the three elastic pins (8) are in the same cross section of the output shaft (1) at equal angles.

7. The power take-off for obtaining motive power of an automobile of claim 1, wherein: push rod (4) pass piston (6) and extend to output direction of output shaft (1), set up switch recess (10) at this extension, be provided with in switch recess (10) slip region correspondence and instruct switch (9), be equipped with on instruct switch (9) can follow push rod (4) global elasticity button (901) of switch recess (10) and can follow switch recess (10) roll-off to push rod (4) global, take out power status indicator lamp when elasticity button (901) roll-in switch recess (10) and close, put through the power status indicator lamp when elasticity button (901) roll-off to push rod (4) global, the power status indicator lamp of taking out lights.