CN216993896U

CN216993896U - Hub reduction gear with braking structure

Info

Publication number: CN216993896U
Application number: CN202220893937.6U
Authority: CN
Inventors: 翟营; 王义平; 郭志强; 王富凯; 杨彦朋; 金鑫
Original assignee: First Tractor Co Ltd
Current assignee: First Tractor Co Ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-07-19
Anticipated expiration: 2032-04-18

Abstract

The utility model provides a hub reduction gear with braking structure, is including connecting motor casing, shell body, gear drive subassembly and brake assembly, connects motor casing and shell body and passes through the bolt and link to each other, and brake assembly is integrated on the shell body, and gear drive unit mount is in connecting motor casing and shell body to it is fixed to lean on the bearing location. The device is provided with a braking structure, and the rocker arm rotating mechanism is adopted, so that the ejector pin moves axially, and the service braking is realized. The wheel edge speed reducer device is used for riding type mowers, is driven by an independent motor, is small in size, simple in part processing and manufacturing and low in cost, integrates a service braking structure on the outer shell of the device, has a heat dissipation function, and well solves the problems of wheel edge speed reduction, braking structure arrangement, zero steering and the like of the existing riding type mowers. Meanwhile, the device can be used as an independent module, different motors are configured to be applied to various types of machines, and the practical effect is good.

Description

Hub reduction gear with braking structure

Technical Field

The utility model relates to the technical field of speed reducers, in particular to a wheel-side speed reducer device with a braking structure for a riding type zero-steering mower.

Background

With the development of socioeconomic at home and abroad, the global gardening lawn is increased year by year, and the market demand of the lawn mower is increased year by year. At present, the main brand of lawn mower in the market is occupied by foreign products, and there are product simple structure, the function singleness in domestic product, the not high scheduling problem of work efficiency. The mower in the current market is mainly divided into a hand-push type mower and a riding type mower, and the riding type mower has the defects of high price, large volume, complex structural arrangement, incapability of completely realizing zero steering function and the like, and is not popularized in a large area all the time. Most riding type mowers in the prior art adopt a small tractor to configure a combined structure of a mowing disc, the combined structure is high in cost and large in size, and a zero-steering function cannot be realized. And to braking structure and radiating structure, all do not integrate together, spatial position is not compact, and it is relatively poor to use the assembly effect.

The state intellectual property office discloses respectively in 2018 12 month 11 date utility model patent "reduction gear casing and reduction gear", and grant publication number CN208221561U, this patent is mainly protruding to be equipped with many crisscross strengthening ribs each other at reduction gear casing's installation wall, but does not mention solitary braking integrated configuration. The utility model discloses a utility model patent "a reduction gear casing, reduction gear and car" that 2021 year 9 month 7 days disclose, grant publication No. CN214146532U, this patent has mainly explained the inside sealed cavity that forms of reduction gear casing, the overall arrangement of strengthening rib, but does not involve braking constructional device. The utility model discloses a utility model patent "the integrated structure and the reducing gear box of reducing gear box and motor that 2018 disclosed on 4 month 17, grant publication No. CN207251382U, this patent highlights the integrated structure of reduction gear casing and motor to and the trend form of radial strengthening rib, does not mention braking structure and gear drive system.

Therefore, it is necessary to design and manufacture a wheel-side reducer which is adaptive to a riding mower, has a small size and a compact structure, and has a braking function.

Disclosure of Invention

The technical purpose of the utility model is as follows: the wheel hub reducer has the advantages of convenience in disassembly and assembly, wide adaptive range, small size, compact structure, good safety and reliability, good heat dissipation function, capability of realizing service braking and capability of better solving the wheel hub reduction and zero steering problems of the existing riding mower.

In order to solve the technical problems, the utility model adopts the technical scheme that: a hub reduction gear with a braking structure comprises a connecting motor shell, an outer shell, a gear transmission assembly and a braking assembly, wherein the connecting motor shell and the outer shell are arranged in a left-right butt joint mode and are connected through bolts, a short screw used for fixing a driving motor is further arranged on one side, not in butt joint with the outer shell, of the connecting motor shell, the gear transmission assembly is installed inside the connecting motor shell and the outer shell and comprises a stage I driving gear shaft, a stage I driven gear, a stage II driving gear shaft, a stage II driven gear and a driving shaft, the stage I driving gear shaft, the stage II driving gear shaft and the driving shaft are arranged in parallel up and down and are respectively fixed in bearing holes in the outer shell and the connecting motor shell through bearings, one end of the stage I driving gear shaft extends out to be connected with the motor shell and is connected with an output shaft of the driving motor through a spline, a third oil seal used for sealing the extending end of the I-stage driving gear shaft is further arranged in the connecting motor shell, the I-stage driven gear is meshed with the I-stage driving gear shaft and is connected with a II-stage driving gear shaft spline, one end of the II-stage driving gear shaft extends out of the outer shell and is connected with the brake assembly, a first framework oil seal used for sealing the extending end of the II-stage driving gear shaft is further arranged in the outer shell, the II-stage driven gear is meshed with the II-stage driving gear shaft and is connected with the driving shaft spline, one end of the driving shaft extends out of the outer shell and is connected with a hub and a tire, and a second oil seal used for sealing the extending end of the driving shaft is further arranged in the outer shell;

the brake assembly comprises a brake support and a brake friction disc, the brake support is fixed on the shell body through a long bolt, the brake friction disc is arranged inside the brake support and connected with a II-grade driving gear shaft spline, friction blocks are arranged on the left side and the right side of the brake friction disc along the radial direction of the brake friction disc respectively, one friction block is fixed in a groove preset in the shell body, the other friction block is connected with the brake unit, the brake unit comprises a top plate, a top pin, a brake rocker arm, a brake spring and an adjusting nut which are sequentially arranged on the brake support from inside to outside, one end of the brake rocker arm is connected with the brake flexible shaft, the brake rocker arm can push the top pin, the top plate and the friction block connected with the brake rocker arm to move axially under the pulling of the brake flexible shaft, and then the two friction blocks clamp the brake friction disc to realize brake.

Preferably, the motor housing and the outer housing are connected and fixed by long screws arranged at the upper part and positioning pins arranged at the lower part of the motor housing and the outer housing respectively.

Preferably, a sealant for preventing oil leakage is further coated on the butt joint surface for connecting the motor shell and the outer shell.

Preferably, I level driving gear axle fix in the shell body and the bearing hole of connecting motor casing through first bearing and fourth bearing respectively, II level driving gear axles also fix in the shell body and the bearing hole of connecting motor casing through first bearing and fourth bearing respectively, the drive shaft is fixed in the shell body and the bearing hole of connecting motor casing through second bearing and third bearing respectively.

Preferably, a lubricant injection hole communicated with the inside of the outer shell is formed in the lower part of the outer shell, and a screw plug is further plugged on the lubricant injection hole.

Preferably, the brake unit further comprises a first washer disposed between the adjusting nut and the brake spring, and the brake rocker arm, the brake spring and the first washer 8 are fixed to the brake bracket through the adjusting nut.

Has the advantages that:

1. the wheel-side speed reducer with the braking structure is simple in structure and convenient to use. The wheel-side speed reducer device is driven by an independent motor and is directly connected with the driving wheel hub, so that the structure is compact, the size is small, the requirement on the space required by the whole zero-steering riding mower can be met, and the influence on the structure of the whole mower is small. Meanwhile, the required parts are simple to process and manufacture and low in cost. Meanwhile, the heat dissipation function is achieved, and the problems of wheel side speed reduction, brake structure arrangement, zero steering and the like of the existing riding mower are solved well.

2. According to the wheel-side speed reducer with the braking structure, the service braking assembly is integrated on the outer shell of the device, effective braking in service is realized by adopting a mode that the rocker rotating mechanism drives the ejector pin to axially move, the braking effect is good, and the braking assembly is convenient to install, safe, reliable and good in practical effect.

3. The wheel-side speed reducer with the braking structure adopts a modular design, and the whole device can be used as an independent module to be matched with different motors, is applied to mower types with different power sections, and has good adaptability. Meanwhile, the whole device can be installed and fixed on the frame, three connecting rods are further arranged between the outer shell and the shell of the connecting motor for connection, the structure is safe and reliable, and the installation and the disassembly are convenient.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a sectional view taken along line B-B of FIG. 2;

FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1;

reference numerals: the brake device comprises a connecting motor shell 1, a first bearing 2, an outer shell 3, a first framework oil seal 4, a brake support 5, a long bolt 6, a top pin 7, a first gasket 8, an adjusting nut 9, a gasket 10, a second gasket 11, an elastic cushion 12, a driving shaft 13, a second oil seal 14, a second bearing 15, a brake rocker arm 16, a brake spring 17, a top plate 18, a friction block 19, a brake friction disc 20, a positioning pin 21, a II-stage driven gear 22, a third bearing 23, a screw plug 24, a II-stage driving gear shaft 25, an I-stage driven gear 26, an I-stage driving gear shaft 27, a third oil seal 28, a fourth bearing 29, a short screw 30 and a long screw 31.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and examples.

As shown in fig. 1 and 2, a front view and a sectional view a-a of a hub reduction gear with a brake structure, the hub reduction gear with the brake structure mainly comprises a connecting motor housing 1, an outer housing 3, a gear transmission assembly and a brake assembly, in the device, the connecting motor housing 1 and the outer housing 3 are connected through bolts, the brake assembly is integrated on the outer housing 3, and the gear transmission assembly is installed in the connecting motor housing 1 and the outer housing 3 and is positioned and fixed by a bearing. The wheel edge speed reducer device is used for riding type mowers, is driven by an independent motor, is small in size, simple in part processing and manufacturing and low in cost, integrates a service braking structure on the outer shell of the device, has a heat dissipation function, and well solves the problems of wheel edge speed reduction, braking structure arrangement, zero steering and the like of the existing riding type mowers. Meanwhile, the device can be used as an independent module, and different motors can be configured to be applied to various machine types.

The wheel-side reducer with the braking structure specifically comprises the following components: the brake device comprises a connecting motor shell 1, a first bearing 2, an outer shell 3, a first framework oil seal 4, a brake support 5, a long bolt 6, a top pin 7, a first washer 8, an adjusting nut 9, a gasket 10, a second washer 11, an elastic washer 12, a driving shaft 13, a second oil seal 14, a second bearing 15, a brake rocker arm 16, a brake spring 17, a top plate 18, a friction block 19, a brake friction disc 20, a positioning pin 21, a II-stage driven gear 22, a third bearing 23, a screw plug 24, a II-stage driving gear shaft 25, an I-stage driven gear 26, an I-stage driving gear shaft 27, a third oil seal 28, a fourth bearing 29, a short screw 30 and a long screw 31.

Connect motor casing 1 and shell body 3 left and right sides butt joint setting, and closely link to each other through lag screw 31 and locating pin 21 between the two, still paint sealed glue on the connection face of connecting motor casing 1 and shell body 3, prevent that fluid from revealing. The upper part of the side of the motor housing 1 not butted with the outer housing 3 is connected with a driving motor through a short screw 30. When the gearbox is in failure, the long screw 31 can be detached to overhaul the inside. The lower part of the outer shell 3 is provided with a lubricating oil injection hole communicated with the inside of the outer shell, the lubricating oil injection hole is also plugged with a screw plug 24, if the lubricating oil needs to be replaced, the screw plug 24 needs to be detached, and the corresponding lubricating oil can be injected through the lubricating oil injection hole. The local of connecting motor casing 1 still designs the strengthening rib, improves the intensity of connecting motor casing 1 on the one hand, and on the other hand plays the radiating effect.

The gear transmission assembly is arranged inside the motor shell 1 and the outer shell 3, can drive the hub and the tire to rotate under the driving of the driving motor, and the brake assembly is arranged on the outer shell 3 and can control the gear transmission assembly to stop transmission under the pulling of the brake flexible shaft, so that the driving brake is realized.

The gear transmission assembly specifically comprises a first-stage driving gear shaft 27, a first-stage driven gear 26, a second-stage driving gear shaft 25, a second-stage driven gear 22 and a driving shaft 13, wherein the first-stage driving gear shaft 27, the second-stage driving gear shaft 25 and the driving shaft 13 are arranged in parallel from top to bottom and are respectively fixed in bearing holes in the outer shell 3 and the connecting motor shell 1 through bearings. The I-stage driving gear shaft 27 is respectively fixed in the bearing holes of the outer shell 3 and the connecting motor shell 1 through the first bearing 2 and the fourth bearing 29, one end of the I-stage driving gear shaft 27 extends out to be connected with the motor shell 1 and is connected with an output shaft spline of the driving motor, a third oil seal 28 for sealing the extending end of the I-stage driving gear shaft is also arranged in the connecting motor shell, the I-stage driven gear 26 is meshed and connected with the I-stage driving gear shaft 27, and is connected with a II-stage driving gear shaft 25 by a spline, the II-stage driving gear shaft 25 is respectively fixed in bearing holes of the outer shell 3 and the motor shell 1 through a first bearing 2 and a fourth bearing 29, and one end of the II-stage driving gear shaft 25 extends out of the outer shell 3 and is connected with the brake component, a first framework oil seal 4 for sealing the extending end of the II-stage driving gear shaft 25 is also arranged in the outer shell 3; the II-stage driven gear 22 is meshed with the II-stage driving gear shaft 25 and connected with the driving shaft 13 through splines, the driving shaft 13 is fixed in a bearing hole of the outer shell 3 and the connecting motor shell 1 through a second bearing 15 and a third bearing 23 respectively, one end of the driving shaft 13 extends out of the outer shell 3 to be connected with a hub and a tire, and a second oil seal 14 used for sealing the extending end of the driving shaft 13 is further arranged in the outer shell 3.

In general, in the gear transmission assembly, the driving motor is connected with the I-stage driving gear shaft 27, and power is output through the driving shaft 13 after two-stage speed reduction. The I-stage driving gear shaft 27 is in splined connection with a driving motor, power is transmitted to the I-stage driving gear shaft 27 from the driving motor, the I-stage driving gear shaft 27 is meshed with the I-stage driven gear 26, the power is transmitted to the I-stage driven gear 26 through the I-stage driving gear shaft 27, and at the moment, the power is transmitted through first-stage speed reduction; the II-stage driving gear shaft 25 is connected with the I-stage driven gear 26 through a spline, power enters the I-stage driven gear 26 and is transmitted to the II-stage driving gear shaft 25, the II-stage driving gear shaft 25 is meshed with the II-stage driven gear 22, the power is transmitted to the II-stage driven gear 22 through the II-stage driving gear shaft 25, the II-stage driven gear 22 is connected with the driving shaft 13 through a spline, and the power is transmitted to the driving shaft 13 through the II-stage driven gear 22 and then is output through the driving shaft 13.

As shown in figures 3 and 4, which are cross-sectional views of the wheel hub reduction gear brake assembly of the present invention, the brake assembly includes a brake bracket 5 and a brake disc 20, the brake bracket 1 is fixed on the outer shell 3 through four long bolts 6, the brake disc 20 is arranged inside the brake bracket 5 and is spline-connected with a II-stage driving gear shaft 25, the brake disc 20 is provided with a friction block 19 along the radial left and right sides thereof, one friction block 19 is fixed in a preset groove in the outer shell 3, the other friction block 19 is connected with a brake unit, the brake unit includes a top plate 18, a top pin 7, a brake rocker arm 16, a brake spring 17 and an adjusting nut 9 which are arranged on the brake bracket from inside to outside in sequence, one end of the brake rocker arm 16 is connected with a brake flexible shaft, the brake rocker arm 16 can be pushed against the top pin 7 under the pulling of the brake flexible shaft, The top plate 18 and the friction blocks 19 connected thereto are axially moved, so that the two friction blocks 19 clamp the brake friction disc 20 to realize braking.

The brake rocker arm 16, the brake spring 17 and the first washer 8 in the brake unit are fixed on the brake bracket 5 through the adjusting nut 9, a gasket 10 is further arranged between the adjusting nut 9 and the first washer 8, the gasket 10 is also fixed on one long bolt 6, a second washer 11 and a spring pad 12 are further arranged on the long bolt 6 at a position between the gasket 10 and the head of the long bolt 6, one end of two ejector pins 7 in the brake unit is connected with the brake rocker arm 16, the other end of the two ejector pins is connected with a top plate 18, the top plate 18 is connected with a friction block 19, and the other friction block 19 is arranged in a groove of the outer shell 3. One end of the brake rocker arm 16 is connected with a brake flexible shaft. When a vehicle brakes, the brake flexible shaft pulls the brake rocker arm 16 to rotate around the pin shaft on the brake support 5, and because the brake rocker arm 16 has an inclination angle, the brake rocker arm 16 gradually pushes against the two ejector pins 7 to axially move along with the change of the angle during rotation, the two ejector pins 7 push against the friction block 19 to clamp the brake friction disc 20, and the brake friction disc 20 is connected with the II-stage driving gear shaft 25 through a spline, so that the brake braking effect can be achieved through friction; when the vehicle is braked, the brake rocker arm 16 returns and rotates in the opposite direction along with the return of the brake spring 17, the two ejector pins 7 gradually return and move axially due to no axial force, the brake friction disc 20 rotates again due to the separation of the friction blocks 19 at the two sides, and therefore the vehicle runs again, and the repeated motion process can achieve the effect of service braking. When the braking force is insufficient, the adjusting nut 9 can be adjusted to further press the first gasket 8, so that the direct idle stroke of the two friction blocks 19 is reduced, and the effect of increasing the braking force is achieved.

The wheel reduction gear with the braking structure of this embodiment is compact in structure, has little influence on the whole machine structure, is convenient for the installation and the disassembly of internal parts of gearboxes such as a driving motor, the braking structure and a gear set, and can be applied to different machine types as independent modules.

It is intended that the embodiments selected for the purpose of disclosing the utility model are presently considered to be suitable, but it is to be understood that the utility model is intended to cover all variations and modifications of the embodiments falling within the spirit and scope of the present inventive concept.

Finally, it will be understood by those skilled in the art that the embodiments of the present invention described above and illustrated in the drawings are illustrative only and not limiting. The objects of the utility model have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. The utility model provides a hub reduction gear with braking structure which characterized in that: the motor comprises a connecting motor shell, an outer shell, a gear transmission assembly and a brake assembly, wherein the connecting motor shell and the outer shell are arranged in a left-right butt joint mode and are connected through bolts, a short screw used for fixing a driving motor is further arranged on one side, not in butt joint with the outer shell, of the connecting motor shell, the gear transmission assembly is arranged inside the connecting motor shell and the outer shell and comprises a first-stage driving gear shaft, a first-stage driven gear, a second-stage driving gear shaft, a second-stage driven gear and a driving shaft, the first-stage driving gear shaft, the second-stage driving gear shaft and the driving shaft are arranged in a vertical parallel mode and are respectively fixed in bearing holes in the outer shell and the connecting motor shell through bearings, one end of the first-stage driving gear shaft extends out to be connected with an output shaft of the driving motor and is connected with the output shaft of the driving motor shell through splines, and a third oil seal used for sealing the extending end of the first-stage driving gear shaft is further arranged in the connecting motor shell, the first-stage driven gear is meshed with the first-stage driving gear shaft and connected with a second-stage driving gear shaft spline, one end of the second-stage driving gear shaft extends out of the outer shell and is connected with the brake assembly, a first framework oil seal used for sealing the extending end of the second-stage driving gear shaft is further arranged in the outer shell, the second-stage driven gear is meshed with the second-stage driving gear shaft and connected with a driving shaft spline, one end of the driving shaft extends out of the outer shell and is connected with a wheel hub and a tire, and a second oil seal used for sealing the extending end of the driving shaft is further arranged in the outer shell;

2. The hub reduction gear with a braking structure according to claim 1, characterized in that: the motor shell and the outer shell are connected and fixed through a long screw arranged on the upper portion of the motor shell and a positioning pin arranged on the lower portion of the motor shell.

3. The hub reduction gear with a braking structure according to claim 1, characterized in that: and a sealant for preventing oil leakage is also coated on the butt joint surface of the connecting motor shell and the outer shell.

4. The hub reduction gear with a braking structure according to claim 1, characterized in that: i level driving gear axle fix the shell body in and connect motor casing's bearing hole through first bearing and fourth bearing respectively, II level driving gear axles also fix the shell body in and connect motor casing's bearing hole through first bearing and fourth bearing respectively, the drive shaft is fixed in the shell body and is connected motor casing's bearing hole through second bearing and third bearing respectively.

5. The hub reduction gear with a braking structure according to claim 1, characterized in that: the lower part of the outer shell is provided with a lubricating oil injection hole communicated with the inside of the outer shell, and the lubricating oil injection hole is also plugged with a screw plug.

6. The hub reduction gear with a braking structure according to claim 1, characterized in that: the brake unit further comprises a first washer, the first washer is arranged between the adjusting nut and the brake spring, and the brake rocker arm, the brake spring and the first washer are fixed on the brake support through the adjusting nut.