CN113803439A

CN113803439A - Front power takeoff

Info

Publication number: CN113803439A
Application number: CN202111142558.XA
Authority: CN
Inventors: 黄瑛
Original assignee: Chongqing Qitong Automobile Parts Co ltd
Current assignee: Chongqing Qitong Automobile Parts Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2021-12-17

Abstract

The invention discloses a preposed power takeoff, which comprises a shell, a main shaft, a flange plate and a power takeoff gear, wherein the head part of the main shaft extends forwards to form an extension part, an axial fixing structure is arranged between the extension part and the flange plate, the power takeoff gear is sleeved at the rear end of the main shaft, the middle part of the main shaft is provided with an annular bulge, the front end of the shell is provided with a front shell cover, the front shell cover comprises a cylindrical cover body, the cylinder opening at the front end of the cover body is provided with a flanging, a first adjusting sheet is arranged between the flanging and the front wall of the shell, the cover body of the front shell cover extends into the shell, the inner wall of the cover body is provided with a separating disc, a first supporting bearing is limited between the separating disc and an annular bulge, a second adjusting sheet is arranged between the first supporting bearing and the annular bulge, a third adjusting sheet is arranged between the annular bulge and a power takeoff gear, and a second supporting bearing is arranged between a main shaft at the rear end of the power takeoff gear and the shell. The invention has convenient installation and reliable performance and can reduce the moment loss.

Description

Front power takeoff

Technical Field

The invention relates to the technical field of automobiles and machinery, in particular to a front-mounted power takeoff.

Background

The power takeoff is one or more groups of speed changing gears, also called power output devices, and generally consists of a gear box, a clutch and a controller, and is connected with a low-gear or an auxiliary box output shaft of the gear box to output power to an external working device, such as a lifting pump and the like. The power of the special vehicles needing additional power, such as a crane, a pump truck, a fire truck, a cement mixer truck, refrigeration and the like, is obtained through a power takeoff, and the power takeoff drives a high-pressure oil pump to supply a dump truck, a water pump to supply the fire truck, a compressor to supply the refrigeration truck, a hydraulic motor to rotate a stirring tank and the like.

The power take-off is typically integrated with the gearbox, taking power from a certain gear of the gearbox. However, since the rear end of the transmission needs to be provided with parts such as an output flange and a pipeline bundle, the power takeoff is directly mounted on the transmission, which has the problems of insufficient space and difficulty in power takeoff and input. Moreover, the internal bearing of the traditional power takeoff is easy to axially float, and the working effect of the power takeoff is greatly influenced.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a front power takeoff which can adjust the axial clearance between two support bearings through an adjusting sheet to prevent the axial play of the front power takeoff, is convenient to mount and reliable in performance, and can reduce the torque loss.

In order to achieve the purpose, the invention provides a front power takeoff, which comprises a shell, a spindle, a flange plate and a power takeoff gear, wherein the shell is provided with a spindle hole penetrating through the front and the back, the spindle is sleeved in the spindle hole, the power takeoff gear is semi-wrapped in the shell and is used for being connected with a crankshaft gear of an engine, the head part of the spindle extends forwards to form an extension part extending out of the shell, an axial fixing structure for fixing the flange plate is arranged between the extension part and the flange plate, the rear end of the flange plate extends into the shell and is connected with the front end of the spindle through a spline to form circumferential fixing, the power takeoff gear is sleeved at the rear end of the spindle, the power takeoff gear and the spindle are also connected through the spline to form circumferential fixing, the middle part of the spindle is integrally formed with an annular bulge, the front end of the shell is provided with a front shell cover, and the front shell cover comprises a cylindrical cover body, the nozzle at the front end of lid is provided with the flanging, be provided with first trimmer between flanging and the casing antetheca, the lid of procapsid lid stretches in the casing, the lid inner wall is provided with annular separating disc, be provided with first support bearing between the main shaft of ring flange rear end and the preceding cap, first support bearing is spacing between separating disc and annular bulge, be provided with the second trimmer between first support bearing and the annular bulge, be provided with the third trimmer between annular bulge and the power takeoff gear, be provided with the second support bearing between the main shaft of power takeoff gear rear end and the casing.

In the scheme, the method comprises the following steps: the axial direction fixed knot constructs including the nut, the nut connects on the extension soon, the hole of ring flange is the step hole that the aperture reduces from the front to the back, the extension stretches to the step hole of ring flange in, the nut backward butt forms the axial direction fixed knot structure on the step portion. The axial fixing structure is simple and effective, convenient to arrange, low in cost and convenient to disassemble and assemble.

In the scheme, the method comprises the following steps: the power takeoff gear is connected with a crankshaft gear of the engine through the idler wheel, transmission of driving force is achieved through the idler wheel, and the power takeoff gear is convenient to set.

In the scheme, the method comprises the following steps: and a gasket is arranged between the bearing inner ring of the first support bearing and the flange plate. The gasket and the separating disc jointly play a role in axial limiting on the first support bearing.

In the scheme, the method comprises the following steps: the rear end of the shell is provided with a rear shell cover used for sealing the spindle hole, the rear shell cover is a rectangular plate, a cylinder extending into the spindle hole is arranged in the middle of the rectangular plate, the cylinder is matched with the spindle hole, and the rectangular plate and the shell are fixed through bolts. After the shell cover is arranged, the shell cover is tightly connected with the shell body, the protection and dust prevention effects are achieved, and the bolt connection is convenient to disassemble and assemble.

In the scheme, the method comprises the following steps: an annular step is arranged on the inner wall of the rear end of the shell, and the second support bearing is limited between the step and the power takeoff gear. Set up the step and carry on spacingly to second support bearing, prevent its axial float and make and have sufficient clearance between second support bearing and the back cap, prevent that the back cap from influencing the main shaft rotation.

In the scheme, the method comprises the following steps: and sealing rings are arranged between the front end of the main shaft and the inner wall of the flange plate, between the flange plate and the inner wall of the front shell cover, between the front shell cover and the inner wall of the shell, and between the rear shell cover and the shell. Each sealing ring plays a role in sealing oil.

The invention has the beneficial effects that:

1. the front power takeoff is integrated with an engine, a crankshaft gear of the engine drives an idle gear, a power takeoff gear shaft is driven to rotate through the idle gear, and the power takeoff gear shaft outputs rotary motion; compared with the power takeoff installed on a gearbox, the power takeoff device is convenient to install and arrange and can reduce torque loss;

2. the front and rear support bearings are arranged on the main shaft, so that the support effect is good, and the stable performance of the power takeoff can be ensured;

3. three adjusting sheets are arranged at different positions, and the axial clearance between the two support bearings can be accurately adjusted through the three adjusting sheets, so that the axial movement of the support bearings is prevented.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Detailed Description

As shown in fig. 1-2, a front power takeoff mainly comprises a shell 1, a main shaft 2, a flange 3 and a power takeoff gear 4. A main shaft hole penetrating through the front and the back is formed in the shell 1, the main shaft 2 is sleeved in the main shaft hole, and the power takeoff gear 4 is wrapped in the shell 1 in a half mode.

The power takeoff gear 4 is used for being connected with a crankshaft gear of an engine, the head of the main shaft 2 extends forwards to extend out of the shell 1 to form an extension part 5, and an axial fixing structure for fixing the flange plate is arranged between the extension part 5 and the flange plate 3.

The rear end of the flange plate 3 extends into the shell 1 and is connected with the front end of the main shaft 2 through a spline to form circumferential fixation, the power takeoff gear 4 is sleeved at the rear end of the main shaft 2, and the power takeoff gear 4 and the main shaft 2 are also connected through a spline to form circumferential fixation.

The middle part of the main shaft 2 is integrally formed with an annular bulge 201, and the front end of the shell 1 is provided with a front shell cover 7. The front housing cover 7 includes a cylindrical cover body, a flange is provided at a nozzle at a front end of the cover body, and a first adjustment sheet 8 is provided between the flange and a front wall of the housing 1. The cover body of the front housing cover 7 extends into the housing 1, the inner wall of the cover body is provided with an annular separating disc 701, a first support bearing 10 is arranged between the main shaft 2 at the rear end of the flange 3 and the front housing cover 7, and the first support bearing 10 is limited between the separating disc 701 and the annular bulge 201. This design enables the first support bearing 10 to be mounted on the front housing cover 7 so that its axial play can be adjusted by means of the first adjustment tab 8.

A second adjusting sheet 11 is arranged between the first support bearing 10 and the annular protrusion 201, a third adjusting sheet 12 is arranged between the annular protrusion 201 and the power takeoff gear 4, and a second support bearing 13 is arranged between the main shaft 2 at the rear end of the power takeoff gear 4 and the housing 1. Three adjusting sheets are arranged at different positions, and the axial clearance between the two support bearings can be accurately adjusted through the three adjusting sheets, so that the axial movement of the support bearings is prevented.

Preferably, the axial fixing structure comprises a nut 6, the nut 6 is screwed on the extension 5, the inner hole of the flange 3 is a stepped hole with a diameter decreasing from front to back, the extension 5 extends into the stepped hole of the flange 3, and the nut 6 abuts against the stepped part 14 backwards to form the axial fixing structure. The axial fixing structure is simple and effective, convenient to arrange, low in cost and convenient to disassemble and assemble.

Preferably, the power take-off gear 4 is connected with a crankshaft gear of the engine through an idler gear, and transmission of driving force is realized through the idler gear, so that the device is convenient to arrange.

Preferably, a spacer 15 is provided between the bearing inner race of the first support bearing 10 and the flange 3. The spacer 15 together with the separating disk 701 serves as an axial stop for the first support bearing 10.

Preferably, the rear end of the housing 1 is provided with a rear housing cover 9 for sealing the spindle hole, the rear housing cover 9 is a rectangular plate, a cylinder extending into the spindle hole is arranged in the middle of the rectangular plate, the cylinder is matched with the spindle hole, and the rectangular plate and the housing 1 are fixed through a bolt. The rear shell cover 9 is tightly connected with the shell 1, so that the functions of protection and dust prevention are achieved, and the bolt connection is convenient to disassemble and assemble.

Preferably, an annular step 101 is provided on the inner wall of the rear end of the housing 1, and the second support bearing 13 is held between the step 101 and the power take-off gear 4. The step 101 is arranged to limit the second support bearing 13, so that the axial movement of the second support bearing 13 is prevented, a sufficient gap is formed between the second support bearing 13 and the rear shell cover 9, and the rear shell cover 9 is prevented from influencing the rotation of the spindle 2.

Preferably, sealing rings are arranged between the front end of the main shaft 2 and the inner wall of the flange 3, between the flange 3 and the inner wall of the front shell cover 7, between the front shell cover 7 and the inner wall of the shell 1, and between the rear shell cover 9 and the shell 1. Each sealing ring plays a role in sealing oil.

Claims

1. The utility model provides a leading power takeoff, includes casing (1), main shaft (2), ring flange (3) and power takeoff gear (4), be provided with the main shaft hole that runs through around on casing (1), main shaft (2) endotheca is in the main shaft hole, power takeoff gear (4) are half parcel in casing (1), its characterized in that: power takeoff gear (4) are used for being connected with the crankshaft gear of engine, main shaft (2) head extends forward and stretches out casing (1) and form extension (5), be provided with the axial fixity structure who is used for fixed flange dish between extension (5) and ring flange (3), the rear end of ring flange (3) stretches into casing (1) in and forms circumference with main shaft (2) front end through splined connection and fixes, power takeoff gear (4) suit is at main shaft (2) rear end, and power takeoff gear (4) also forms circumference fixedly through splined connection with main shaft (2), the middle part integrated into one piece of main shaft (2) has annular arch (201), the front end of casing (1) is provided with preceding cap (7), preceding cap (7) include the cylindric lid, are provided with the flanging at the section of thick bamboo mouth of the front end of lid, be provided with first trimmer (8) between flanging and casing (1) antetheca wall, the lid of preceding casing lid (7) stretches to in casing (1), the lid inner wall is provided with annular separating disc (701), be provided with first support bearing (10) between main shaft (2) of ring flange (3) rear end and preceding casing lid (7), first support bearing (10) are spacing between separating disc (701) and annular bulge (201), be provided with second trimmer (11) between first support bearing (10) and annular bulge (201), be provided with third trimmer (12) between annular bulge (201) and power takeoff gear (4), be provided with second support bearing (13) between main shaft (2) of power takeoff gear (4) rear end and casing (1).

2. The front power takeoff as recited in claim 1, further comprising: the axial fixity structure includes nut (6), nut (6) connect soon on extension (5), the hole of ring flange (3) is the step hole that the aperture reduces from the front to the back, in the step hole of ring flange (3) is stretched in extension (5), nut (6) backward butt forms the axial fixity structure on step portion (14).

3. The front power takeoff as recited in claim 1, further comprising: and the power takeoff gear (4) is connected with a crankshaft gear of the engine through an idler gear.

4. The front power takeoff as recited in claim 1, further comprising: and a gasket (15) is arranged between the bearing inner ring of the first support bearing (10) and the flange plate (3).

5. The front power takeoff as recited in claim 1, further comprising: the rear end of the shell (1) is provided with a rear shell cover (9) used for sealing the spindle hole, the rear shell cover (9) is a rectangular plate, a cylinder extending into the spindle hole is arranged in the middle of the rectangular plate, the cylinder is matched with the spindle hole, and the rectangular plate and the shell (1) are fixed through bolts.

6. The front power takeoff as recited in claim 1, further comprising: an annular step (101) is arranged on the inner wall of the rear end of the shell (1), and the second supporting bearing (13) is limited between the step (101) and the power takeoff gear (4).

7. The pre-power takeoff as claimed in claim 5, wherein: and sealing rings are arranged between the front end of the main shaft (2) and the inner wall of the flange plate (3), between the flange plate (3) and the inner wall of the front shell cover (7), between the front shell cover (7) and the inner wall of the shell (1) and between the rear shell cover (9) and the shell (1).