CN218326111U - Through shaft power takeoff assembly - Google Patents

Abstract

The utility model discloses a through shaft power takeoff assembly, which comprises a power takeoff shell, a power takeoff input shaft, a sliding sleeve, an input gear shaft, a piston and an output gear shaft; the cover is equipped with deep groove ball bearing on the power takeoff input shaft, the power takeoff input shaft meshes with the sliding sleeve, sliding sleeve and input gear shaft meshing, input gear shaft and output gear shaft meshing, tapered roller bearing is all installed at the both ends of input gear shaft and output gear shaft, the one end of piston shaft is connected to the sliding sleeve, the piston shaft runs through the input gear shaft, the cover is equipped with return spring on the piston shaft, one side of thrust ball bearing is installed to the other end of piston shaft, thrust ball bearing's opposite side sets up in the recess of piston end face, the piston is installed in the cylinder of power takeoff casing. The utility model discloses a power takeoff body compact structure, work are steady, have guaranteed that power takeoff occupation space size is little, mounted position and output form are nimble changeable.

Description

Through shaft power takeoff assembly

Technical Field

The utility model belongs to the power takeoff field, especially a link up axle power takeoff assembly.

Background

The automobile power takeoff is generally operated by electric control gas, when a driver opens a power takeoff control switch arranged in a cab and switches on an electromagnetic valve on a chassis, the power takeoff can be in a working state, and at the moment, compressed air pushes a piston of a cylinder of the power takeoff to output power; conversely, the driver can stop the power takeoff by closing the power takeoff switch. At present, a common gear engaging mode of an automobile power takeoff is bidirectional air operation, low-pressure air is normally used as gear disengaging force, and the on-off of high-pressure air is controlled to realize whether the power takeoff is engaged or not; however, the control system of the bidirectional air operation has a complex structure, large mechanical size and high cost, so that the power takeoff is too close to the frame of the whole vehicle or an oil path and an air path are difficult to arrange and cannot be matched with the power takeoff, and the application range is not wide enough.

Disclosure of Invention

An object of the utility model is to solve the problem among the prior art, provide a link up axle power takeoff assembly.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

a through shaft power takeoff assembly comprises a power takeoff shell, a power takeoff input shaft, a sliding sleeve, an input gear shaft, a piston and an output gear shaft;

the cover is equipped with deep groove ball bearing on the power takeoff input shaft, the power takeoff input shaft meshes with the sliding sleeve, sliding sleeve and input gear shaft meshing, input gear shaft and output gear shaft meshing, tapered roller bearing is all installed at the both ends of input gear shaft and output gear shaft, the one end of piston shaft is connected to the sliding sleeve, the piston shaft runs through the input gear shaft, the cover is equipped with return spring on the piston shaft, one side of thrust ball bearing is installed to the other end of piston shaft, thrust ball bearing's opposite side sets up in the recess of piston end face, the piston is installed in the cylinder of power takeoff casing.

Furthermore, the power takeoff input shaft is connected with the transmission intermediate shaft through a spline, a first elastic check ring is arranged between the power takeoff input shaft and the deep groove ball bearing, and the deep groove ball bearing is in interference fit with the transition shell.

Furthermore, the sliding sleeve is fixedly connected with the piston shaft through a second connecting bolt.

Further, tapered roller bearing installs in the input shaft bearing cap, tapered roller bearing and power takeoff casing interference fit, be provided with first adjustment pad between input shaft bearing cap and the power takeoff casing.

Furthermore, a second elastic check ring is arranged in a clamp spring groove in the power takeoff shell, and a second adjusting pad is arranged between the second elastic check ring and the tapered roller bearing.

Furthermore, the power takeoff casing is connected with the transition casing through a third connecting bolt, and a sealing gasket is arranged between the power takeoff casing and the transition casing.

Furthermore, an O-shaped sealing ring is arranged in a groove in the side surface of the piston.

Furthermore, the output gear shaft is connected with the flange plate through a first connecting bolt, and the output gear shaft is meshed with an external spline of the flange plate through an internal spline.

Furthermore, install first skeleton oil blanket between power takeoff casing and the output gear axle, install second skeleton oil blanket on the ring flange.

Furthermore, a pressure switch is installed on the outer wall of the air cavity connected with the power takeoff shell, and an oil drain plug screw is installed on the power takeoff shell.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model provides a link up axle power takeoff assembly adopts one-way gas to control and puts into gear, the inside transmission structure of two shaft types, and the cylinder is integrated in the power takeoff casing, forms the air cavity through the inside hole of casing and the cooperation of piston, sealing washer, has compressed power takeoff axial dimensions. The center of an input gear shaft of the power takeoff is communicated, a piston shaft is communicated with the center of the input gear shaft of the power takeoff, a sliding sleeve is connected to the piston shaft through a bolt, and the power takeoff is engaged with the gear through the engagement of an internal spline of the sliding sleeve and an external spline of the input shaft. The structure arranges the cylinder cavity and the input gear cavity of the power takeoff shell to one axis, and effectively compresses the radial size of the power takeoff. The utility model discloses a power takeoff body compact structure, work are steady, have guaranteed that power takeoff occupation space size is little, space utilization is high, part is small in quantity, and mounted position and output form are nimble variable, and the motorcycle type that can match is more extensive with the use scene, guarantees the reliability of power takeoff function and product simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic cross-sectional view of the through shaft power takeoff assembly of the present invention.

Fig. 2 is a rear view of the power takeoff assembly with through shaft according to the present invention.

Fig. 3 is a schematic diagram of the air chamber of the through shaft power takeoff assembly of the present invention.

Fig. 4 is a schematic view of the oil passage of the power takeoff assembly of the present invention.

Wherein: 1-transition shell, 2-power takeoff shell, 3-power takeoff input shaft, 4-locating pin, 5-mounting bolt, 6-deep groove ball bearing, 7-first elastic retainer ring, 8-sealing gasket, 9-input shaft bearing cover, 10-first adjusting pad, 11-tapered roller bearing, 12-sliding sleeve, 13-input gear shaft, 14-return spring, 15-piston shaft, 16-thrust ball bearing, 17-O type sealing ring, 18-piston, 19-pressure switch, 20-output gear shaft, 21-1-first framework oil seal, 21-2-second framework oil seal, 22-second elastic retainer ring, 23-flange plate, 24-second adjusting pad, 25-oil drain plug screw, 26-first connecting bolt, 27-second connecting bolt and 28-third connecting bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships usually placed when the products of the present invention are used, the description is merely for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific direction, be constructed and operated in a specific direction, and therefore, cannot be understood as a limitation to the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "set", "mounted", "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The present invention will be described in further detail with reference to the accompanying drawings:

referring to fig. 1 to 4, the utility model provides a through shaft power takeoff assembly, including transition casing 1, power takeoff casing 2, power takeoff input shaft 3, deep groove ball bearing 6, input shaft bearing cap 9, tapered roller bearing 11, sliding sleeve 12, input gear axle 13, return spring 14, piston shaft 15, thrust ball bearing 16, piston 18, output gear axle 20, skeleton oil blanket 21, ring flange 23 and oil drain plug screw 25;

the power takeoff assembly consists of two sections of shell transition shells 1 and a power takeoff shell 2, a deep groove ball bearing 6 is mounted on a power takeoff input shaft 3 and is mounted in the transition shell 1 after being limited by a first elastic check ring 7, the outer ring of the deep groove ball bearing 6 is in interference fit with the transition shell 1, and then the first elastic check ring 7 is used for axial limiting.

The inner rings of the four tapered roller bearings 11 are respectively and thermally installed at two ends of the input gear shaft 13 and the output gear shaft 20, wherein the outer rings of the two tapered roller bearings 11 are pressed into corresponding installation holes of the power takeoff casing 2, and the input gear shaft 13 and the output gear shaft 20 are installed into the power takeoff casing 2 corresponding to the existing bearing outer rings. An O-shaped sealing ring 17 is arranged at a groove on the side surface of the piston 18, an outer ring of the thrust ball bearing 16 is arranged in a groove on the bottom surface of the piston 18, grease is coated on the outer side wall of the piston 18, and the piston is arranged in a cylinder of the power takeoff shell 2. The outer ring of the other side of the thrust ball bearing 16 is installed on a piston shaft 15, a return spring 14 is sleeved on the piston shaft 15 and is positioned on a piston 18 through the thrust ball bearing 16, the center of the input gear shaft 13 is opened, the piston shaft 15 penetrates through the piston shaft, and the sliding sleeve 12 is inserted into the internal spline of the input gear shaft 13. The tapered roller bearing 11 outer race is mounted on the input shaft bearing cover 9, and the input shaft bearing cover 9 is mounted in the power take-off housing 2. Measuring the dimension from the end face of the input shaft bearing cap 9 to the end face of the power take-off housing 2 sets a first setting pad 10 of suitable thickness.

Both ends of the input gear shaft 13 and the output gear shaft 20 are in interference fit with inner rings of the tapered roller bearings 11, outer rings of the tapered roller bearings 11 are in interference fit with the power takeoff shell 2 or the input shaft bearing cover 9, and when the power takeoff device works, the outer rings of the tapered roller bearings 11 are static under the action of friction force, and the inner rings of the tapered roller bearings rotate along with the input gear shaft 13 and the output gear shaft 20. The internal dynamic balance of the power takeoff can be realized by selecting different tapered roller bearings 11 with reasonable sizes. The axial direction of the tapered roller bearing 11 is positioned through a gear shaft shoulder, the designated size is measured during assembly, and the axial clearance of the tapered roller bearing 11 is ensured by selecting an adjusting pad with a proper size.

The output gear shaft 20 is installed on the output side of the power takeoff casing 2, a second elastic check ring 22 is arranged in a clamp spring groove on the power takeoff casing 2, and a second adjusting pad 24 with proper thickness is arranged between the tapered roller bearing 11 and the second elastic check ring 22. The first framework oil seal 21-1 is arranged between the output gear shaft 20 and the power takeoff shell 2, the inner ring of the first framework oil seal 21-1 is matched with the output gear shaft 20, and the outer ring of the first framework oil seal is matched with the power takeoff shell 2 to form a sealed cavity; the second framework oil seal 21-2 is arranged on a flange plate 23, the outer ring of the second framework oil seal is matched with the power takeoff shell 2 to form a sealed cavity, and the flange plate 23 is inserted into an internal spline of the output gear shaft 20 and is fixed through an inner hexagonal first connecting bolt 26.

The output form of the 8-tooth internal spline can be changed by removing the flange plate 23, the first connecting bolt 26 and the second framework oil seal 21-2 at the outer side of the output end of the power takeoff, an oil pump with matched interfaces can be installed, and the shaft head of the oil pump is directly meshed with the output gear shaft 20, so that the axial space occupied by the power takeoff can be further reduced.

Sealing gaskets 8 are arranged between the transition shell 1 and the power take-off shell 2, and the transition shell 1 and the power take-off shell 2 are fixed by 4 hexagon socket type third connecting bolts 28. The outer wall of the air cavity of the power takeoff shell 2 is provided with a pressure switch 19, and an oil drain plug screw 25 is arranged at the bottom of the power takeoff shell 2.

The utility model discloses a link up an axle power takeoff assembly's theory of operation does:

power transmission of the power takeoff: the power takeoff is arranged on the transmission through the positioning pin 4 and the mounting bolt 5, is flexible in mounting position and convenient to arrange, and is not prone to interference with other parts of the whole vehicle; the power takeoff input shaft 3 is inserted into an internal spline of a transmission intermediate shaft, and the transmission inputs the power of an engine into the power takeoff input shaft 3. As shown in fig. 1, the external splines at the right end of the sliding sleeve 12 are constantly meshed with the input gear shaft 13 and the sliding sleeve 12 can move in the axial direction; when the power takeoff enters a gear engaging state, the sliding sleeve 12 and the power takeoff input shaft 3 coaxially rotate through the spline, and then the sliding sleeve 12 drives the input gear shaft 13; the gears of the input gear shaft 13 and the output gear shaft 20 are in a constant meshing state, the internal spline of the output gear shaft 20 is in constant meshing with the external spline of the flange plate 23, the power of the engine is transmitted to the flange plate 23 through the parts, and the power takeoff outputs the power.

The power takeoff is put into gear: as shown in fig. 3, the power takeoff casing 2 and the piston 18 form a closed air cavity, and the piston 18 is sleeved with two O-shaped sealing rings 17 to ensure air tightness; in the figure 3, the pressure switch 19 has the functions of airtightness and pressure resistance, and 6-8 bar of gas is introduced into a gas inlet to serve as a gear engaging force source. When the driver sends a power takeoff gear engaging command, and the power takeoff electromagnetic valve opens the air passage, the gear engaging air fills the air cavity in fig. 3, and pushes the piston 18 to the left. As shown in FIG. 1, a thrust ball bearing 16 is mounted at the bottom of the piston 18, the other side outer ring of the thrust ball bearing 16 is mounted on the piston shaft 15, the leftward movement of the piston 18 drives the piston shaft 15 to move and compress the return spring 14, and the rotation of the piston shaft 15 is not transmitted to the piston 18 due to the thrust ball bearing 16. The piston shaft 15 runs through the input gear shaft 13, the piston shaft 15 is fixedly connected with the sliding sleeve 12 through a second connecting bolt 27 of an inner hexagon type in the center of the sliding sleeve 12, namely, the sliding sleeve 12 is finally driven to axially move after the piston 18 is pushed by gas, and the inner spline of the shaft head of the sliding sleeve 12 is provided with a conical chamfer so as to be easily meshed with the outer spline of the power takeoff input shaft 3, so that the power takeoff is engaged.

Gear taking off of the power takeoff: after a driver sends a gear-off command of the power takeoff, the working air path of the electromagnetic valve is disconnected, the exhaust air path is opened, and the air cavity of the power takeoff is communicated with the atmosphere. The piston shaft 15 moves to the right under the action of the resilience force of the return spring 14 to drive the piston 18 to exhaust gas in the gas cavity; meanwhile, the second connecting bolt 27 drives the sliding sleeve 12 to move right, so that an inner spline of the sliding sleeve is separated from an outer spline of the power takeoff input shaft 3, and the power takeoff loses a power source and is successfully picked.

Outputting signals of a power takeoff pressure switch: the pressure switch 19 is pressed in by the piston 18 in the power takeoff gear-off state, the pressure switch 19 is of a normal-through type, after the contact is connected, the internal channel of the pressure switch 19 is disconnected and does not output any signal any more, and a power takeoff indicator lamp of a cab is turned off. When the power takeoff is in gear, the push rod of the pressure switch 19 is restored to the free state, the switch circuit is connected to output signals, and the pilot lamp of the power takeoff in the cab is turned on.

Power takeoff lubrication: the product lubrication mode is forced lubrication, even power takeoff mounted position is close to the upper end also can make lubricating oil get into the power takeoff. As shown in fig. 4, the lubricating oil flows from the transmission extension oil pipe to the deep groove ball bearing 6 at the input end through the through hole on the transition housing 1, then naturally flows into the power takeoff under the action of gravity, soaks the output gear shaft 20, and simultaneously splashes to the input gear shaft 13. The power takeoff lubricating oil is the same as the transmission lubricating oil and flows back to the interior of the transmission from the front end opening of the power takeoff. Two skeleton oil seals 21 are arranged at the rear end of the power takeoff between the power takeoff shell 2 and the output gear shaft 20 and on the flange plate 23, so that oil leakage is avoided.

The utility model discloses a link up test of inserting winding of axle power takeoff assembly:

the air pressure is 5-8 bar, the air inlet is switched on and off for 5 times, an indicator lamp arranged on a pressure switch 19 is observed, the indicator lamp is turned on when the air is switched on, the indicator lamp is turned off within 1 second after the air is switched off, the power takeoff runs for 30s in a gear engaging state, the power takeoff runs normally and does not have the problems of knocking, abnormal sound and the like, and the power takeoff passes an offline test.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A through shaft power takeoff assembly is characterized by comprising a power takeoff shell (2), a power takeoff input shaft (3), a sliding sleeve (12), an input gear shaft (13), a piston shaft (15), a piston (18) and an output gear shaft (20);

the cover is equipped with deep groove ball bearing (6) on power takeoff input shaft (3), power takeoff input shaft (3) and sliding sleeve (12) meshing, sliding sleeve (12) and input gear axle (13) meshing, input gear axle (13) and output gear axle (20) meshing, tapered roller bearing (11) are all installed at the both ends of input gear axle (13) and output gear axle (20), the one end of piston axle (15) is connected in sliding sleeve (12), input gear axle (13) is run through in piston axle (15), the cover is equipped with return spring (14) on piston axle (15), one side of thrust ball bearing (16) is installed to the other end of piston axle (15), the opposite side setting of thrust ball bearing (16) is in the recess of piston (18) terminal surface, piston (18) are installed in the cylinder of power takeoff casing (2).

2. A through-shaft power take-off assembly as claimed in claim 1, wherein the power take-off input shaft (3) is connected with the transmission intermediate shaft by splines, a first circlip (7) is arranged between the power take-off input shaft (3) and the deep groove ball bearing (6), and the deep groove ball bearing (6) is in interference fit with the transition casing (1).

3. A through-shaft power take-off assembly according to claim 1, wherein the sliding sleeve (12) is fixedly connected to the piston shaft (15) by means of a second connecting bolt (27).

4. A through-shaft power take-off assembly according to claim 1, wherein the tapered roller bearing (11) is mounted in an input shaft bearing cap (9), the tapered roller bearing (11) being an interference fit with the power take-off housing (2), and a first adjustment pad (10) being provided between the input shaft bearing cap (9) and the power take-off housing (2).

5. A through-shaft power take-off assembly according to claim 1, wherein a second circlip (22) is provided in a circlip groove in the power take-off housing (2), and a second adjusting pad (24) is provided between the second circlip (22) and the tapered roller bearing (11).

6. A through-shaft power take-off assembly according to claim 1, wherein the power take-off housing (2) is connected to the transition housing (1) by a third connecting bolt (28), and a sealing gasket (8) is arranged between the power take-off housing (2) and the transition housing (1).

7. A through-shaft power take-off assembly according to claim 1, wherein an O-ring seal (17) is provided in a groove in the side of the piston (18).

8. A through-shaft power takeoff assembly as claimed in claim 1, wherein said output gear shaft (20) is connected to the flange plate (23) by a first connecting bolt (26), said output gear shaft (20) being in splined engagement with external splines of the flange plate (23) by internal splines.

9. A through-shaft power take-off assembly as claimed in claim 8, wherein a first frame oil seal (21-1) is mounted between the power take-off housing (2) and the output gear shaft (20), and a second frame oil seal (21-2) is mounted on the flange (23).

10. A through-shaft power takeoff assembly as claimed in claim 1, wherein a pressure switch (19) is mounted on the outer wall of the air chamber to which said power takeoff housing (2) is connected, and an oil drain plug (25) is mounted on said power takeoff housing (2).

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