CN108515812B

CN108515812B - Semi-axis structure of electronic commodity circulation car rear axle disc braking

Info

Publication number: CN108515812B
Application number: CN201810322349.5A
Authority: CN
Inventors: 杨爱喜
Original assignee: Wuhu Bao Qi Automobile Making Co Ltd
Current assignee: Wuhu Bao Qi Automobile Making Co Ltd
Priority date: 2018-04-11
Filing date: 2018-04-11
Publication date: 2020-03-10
Anticipated expiration: 2038-04-11
Also published as: CN108515812A

Abstract

The invention discloses a rear axle disc type braking half-shaft structure of an electric logistics vehicle, which comprises a half shaft, a rim, a bridge pipe, a brake disc and a bearing cover, and is characterized in that: the brake caliper comprises a caliper body, brake linings are connected to the two sides of the caliper body in a sliding fit mode, one end of a bridge pipe is connected with the half shaft, the brake disc is connected to the half shaft through the transition disc, and the bearing cover is connected with the bearing seat through the connecting bolt. When the semi-axle is machined by adopting the transition disc structure, the wheel span difference of the rear axle can be effectively compensated, the dynamic balance of the brake disc is reduced, and the installation and the maintenance are convenient; meanwhile, the wheels, the transition disc, the brake disc and the half shaft can be regarded as the same moving body, and the problem of difficulty in installation of the traditional structure mode is solved.

Description

Semi-axis structure of electronic commodity circulation car rear axle disc braking

Technical Field

The invention relates to the technical field of electric logistics vehicle processing, in particular to a half shaft structure of a rear axle disc brake of an electric logistics vehicle.

Background

With the continuous progress of human society, the energy shortage and environmental pollution caused by the traditional fuel vehicle are becoming more and more serious, and new energy becomes a new trend; most of the existing braking devices of the electric logistics vehicles adopt drum braking of the traditional rear axle wheel, and the drum braking has defects and unstable braking efficiency; under the condition of using working conditions, during continuous braking, the friction plate is sealed in the brake drum, and the generated large heat is not easy to dissipate, so that the friction plate is heated to expand and the friction force is reduced. When the drum brake runs on a rainwater road surface, the friction force is reduced after the wheel hub is soaked, and the braking efficiency of the whole vehicle is reduced.

There are two types of half-axle structures in use today: a bearing is used to traditional semi-axis structure and is tapered roller bearing, but the structure is more complicated and be not convenient for installation maintenance, and another kind of semi-axis structure uses single-row deep groove ball bearing, but the rear axle bearing capacity is less, is not suitable for electronic commodity circulation car to use.

Disclosure of Invention

The invention aims to solve the technical problems of low braking efficiency, complex half-axle structure, inconvenience in installation and maintenance, small rear axle bearing capacity and the like of drum braking of the electric logistics vehicle at the present stage, and provides the half-axle structure of the rear axle disc type braking of the electric logistics vehicle, which has the advantages of reasonable structural design, good quality performance, convenience in installation and maintenance of the half-axle, high braking efficiency and high rear axle bearing capacity.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides an electronic logistics vehicle rear axle disc brake's semi-axis structure, includes semi-axis, rim, bridge pipe, brake disc, bearing cap, its characterized in that: the brake caliper comprises a caliper body, brake linings are connected to the two sides of the caliper body in a sliding fit mode, one end of the bridge pipe is connected with the half shaft, the brake disc is connected to the half shaft through the transition disc, and the bearing cover is connected with the bearing seat through the connecting bolt. When the semi-axle is machined by adopting the transition disc structure, the wheel span difference of the rear axle can be effectively compensated, the dynamic balance of the brake disc is reduced, and the installation and the maintenance are convenient; meanwhile, the wheels, the transition disc, the brake disc and the half shaft can be regarded as the same moving body, and the problem of difficulty in installation of the traditional structure mode is solved.

Preferably, be provided with the location boss on the semi-axis outer wall, cup joint brake disc and transition dish respectively on location boss outer wall the equipartition has central round hole fluting in the brake disc equipartition location fluting in the transition dish, central round hole fluting and location fluting dislocation set have improved the stability of brake disc and transition dish on the semi-axis through the location boss, and then reinforcing semi-axis structure's quality performance.

Preferably, the bearing seat in be provided with the semi-axis cup joint the cooperation and fix the adapter sleeve on the ladder through-hole, improved the joint strength between bearing seat and the semi-axis cover through the adapter sleeve, reinforcing bearing seat stability on the semi-axis.

Preferably, the inner wall of the bearing seat is respectively provided with a spacer bush, a first half-shaft bearing and a second half-shaft bearing, the spacer bush is arranged between the first half-shaft bearing and the second half-shaft bearing, the first half-shaft bearing and the second half-shaft bearing are respectively positioned by the spacer bush, the half shaft adopts a double-deep groove ball bearing structure, the rated dynamic load is increased by 25 percent compared with a single-row deep groove ball bearing in a light-series double-single-row deep groove ball bearing with the same outer diameter, the service life of the double-single-row bearing under the same rear axle load is increased by about 2 times, the bearing capacity of the rear axle is improved, and the half shaft is simple.

Preferably, the first half-shaft bearing and the second half-shaft bearing are axially positioned, the first half-shaft bearing is uniformly provided with a slot, the second half-shaft bearing is uniformly provided with a slot, the first half-shaft bearing and the second half-shaft bearing are arranged in a staggered manner, and under the condition that the vehicle is on different road surfaces, the first half-shaft bearing and the second half-shaft bearing can bear radial force and outward axial force under the reaction force of the wheels in all directions, so that the wheels and the half shafts can be prevented from generating axial displacement under the action of lateral force.

Preferably, the two brake linings are correspondingly arranged on two sides of the brake disc, the inner side surface of each brake lining is matched with the disc surface of the brake disc to be in contact with the disc surface of the brake disc, the brake lining on one side of the brake disc is connected with a wheel cylinder of a brake caliper to enable the wheel cylinder to be in press fit with the pressure wall, the unit pressure of the brake lining on the brake disc is high, water is easily extruded out, the brake lining is easily thrown away after being wetted under the action of centrifugal force, the wiping action of the brake lining on the brake disc is improved, in addition, the disc type brake lining is easier to replace than a drum type brake lining after being worn, the structure is simpler, and.

Preferably, wheel bolts and half-shaft bolts are evenly distributed on the transition disc, the wheel bolts and the half-shaft bolts are arranged for wheel centering, the stability of the wheel on the half shaft can be improved through the wheel bolts and the half-shaft bolts, and then the stability of the electric logistics vehicle in the driving process is improved.

Has the advantages that: when the semi-axle is machined by adopting the transition disc structure, the wheel span difference of the rear axle can be effectively compensated, the dynamic balance of the brake disc is reduced, and the installation and the maintenance are convenient; meanwhile, the wheel, the transition disc, the brake disc and the half shaft can be regarded as the same moving body, the problem of difficult installation in the traditional structure mode is solved, a spacer bush, a half shaft bearing I and a half shaft bearing II are respectively arranged on the inner wall of a bearing seat, the spacer bush is arranged between the half shaft bearing I and the half shaft bearing II, the spacer bush is respectively used for positioning the half shaft bearing I and the half shaft bearing II, the half shaft adopts a double-deep groove ball bearing structure, the rated dynamic load is increased by 25 percent compared with a light-series double-single-row deep groove ball bearing with the same outer diameter, the service life of the double-single-row bearing is prolonged by about 2 times under the same rear axle load, the bearing capacity of the rear axle is improved, and meanwhile, the.

Drawings

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

Fig. 2 is a partial structural schematic view of the present invention, illustrating a connection structure of a rim and wheel bolts.

Fig. 3 is a partial structural schematic diagram of the invention, illustrating the structure of the bearing seat.

Fig. 4 is a schematic cross-sectional view a-a of fig. 3 of the present invention.

In the figure: 1. the automobile brake comprises a half shaft, a rim, a bridge pipe, a brake disc, a bearing cover, a transition disc, a half shaft flange, a brake caliper, a caliper body, a brake lining, a wheel cylinder, a pressure wall, a positioning boss, a wheel bolt, a half shaft bolt, a bearing seat, a fastening sleeve, a spacer bush, a half shaft bearing I, a half shaft bearing II and a connecting bolt, wherein the half shaft bearing II, the brake disc, the bearing cover and the connecting bolt are arranged on the half shaft flange, the brake caliper body, the brake lining, the wheel cylinder, the pressure wall, the.

Detailed Description

The invention will be described in more detail below with reference to the accompanying drawings.

The utility model provides an electronic logistics vehicle rear axle disc brake's semi-axis structure, includes semi-axis 1, rim 2, bridge pipe 3, brake disc 4, bearing cap 5, its characterized in that: the brake caliper comprises a half shaft 1, a transition disc 6 is arranged on the outer side of the half shaft 1 through a half shaft bolt 15, a bearing seat 16 is sleeved on the inner side of the half shaft 1 in a stepped mode, a half shaft flange 7 is arranged on the bearing seat 16 through a connecting bolt 21, a wheel bolt 14 is arranged on the transition disc 6, a rim 2 is connected with the transition disc 6 through the wheel bolt 14, a brake caliper 8, a wheel cylinder 11 and a pressure wall 12 are arranged on the rim 2, the brake caliper 8 comprises a caliper body 9, two sides of the caliper body 9 are connected with brake linings 10 in a sliding fit mode, one end of a bridge pipe 3 is connected with the half shaft 1, the brake disc 4 is connected onto the half shaft 1 through the transition disc 6, and the bearing cover 5 is connected with the bearing seat 16 through. When the half shaft 1 is machined by adopting the structure of the transition disc 6, the wheel span difference of a rear axle can be effectively compensated, the dynamic balance of the brake disc 4 is reduced, and the installation and the maintenance are convenient; meanwhile, the wheel, the transition disc 6, the brake disc 4 and the half shaft 1 can be regarded as the same moving body, and the problem of difficulty in installation of the traditional structure mode is solved.

Preferably, be provided with location boss 13 on the semi-axis 1 outer wall, cup joint brake disc 4 and transition dish 6 respectively on location boss 13 outer wall the equipartition has central round hole fluting in the brake disc 4 the equipartition location fluting in the transition dish 6, central round hole fluting and location fluting dislocation set have improved the stability of brake disc 4 and transition dish 6 on semi-axis 1 through location boss 13, and then strengthen the quality performance of semi-axis 1 structure.

Preferably, a fastening sleeve 17 is arranged in the bearing seat 16 and matched with the half shaft 1 in a sleeved mode on the stepped through hole in a fixed mode, the connecting strength between the bearing seat 16 and the half shaft 1 is improved through the fastening sleeve 17, and the stability of the bearing seat 16 on the half shaft 1 is enhanced.

Preferably, the inner wall of the bearing block 16 is respectively provided with a spacer 18, a first half-shaft bearing 19 and a second half-shaft bearing 20, the spacer 18 is arranged between the first half-shaft bearing 19 and the second half-shaft bearing 20, the first half-shaft bearing 19 and the second half-shaft bearing 20 are respectively positioned by the spacer 18, the half shaft 1 adopts a double deep groove ball bearing structure, the rated dynamic load is increased by 25% compared with a single-row deep groove ball bearing with the same outer diameter of a light-series double single-row deep groove ball bearing, the service life of the double single-row bearing under the same rear axle load is increased by about 2 times, the bearing capacity of the rear axle is improved, and the half shaft 1 has a simple structure and is convenient to install and.

Preferably, the first half-shaft bearing 19 and the second half-shaft bearing 20 are axially positioned, the first half-shaft bearing 19 is uniformly provided with a first half-shaft bearing slot, the second half-shaft bearing 20 is uniformly provided with a second half-shaft bearing slot, the first half-shaft bearing slot and the second half-shaft bearing slot are arranged in a staggered manner, and under the condition that the vehicle is on different road surfaces, the first half-shaft bearing 19 and the second half-shaft bearing 20 can bear radial force and outward axial force under the reaction force of each direction of the wheel, so that the wheel and the half shaft 1 can be prevented from axial displacement under the action of lateral force.

Preferably, the two brake linings 10 are correspondingly arranged on two sides of the brake disc 4, the inner side surface of each brake lining 10 is matched and contacted with the disc surface of the brake disc 4, the brake lining 10 is connected with a wheel cylinder 11 of a brake caliper 8 on one side of the brake disc 4 to be matched on a pressure wall 12 in a pressure fit mode, the unit pressure of the brake lining 10 on the brake disc 4 is high, water is easy to extrude out, the brake lining 10 is easy to throw away after being wetted under the action of centrifugal force, the wiping action of the brake lining 10 on the brake disc 4 is improved, in addition, the disc type brake lining 10 is easier to replace after being worn compared with the drum type brake lining 10, the structure is simpler, and the maintenance is easy.

Preferably, wheel bolts 14 and half-axle bolts 15 are uniformly distributed on the transition disk 6, the wheel bolts 14 and the half-axle bolts 15 are arranged for centering of the wheel, and the stability of the wheel on the half-axle 1 can be improved through the wheel bolts 14 and the half-axle bolts 15, so that the stability of the electric logistics vehicle in the driving process is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

The parts not involved in the present invention are the same as or can be implemented using the prior art.

Claims

1. The utility model provides an electronic logistics vehicle rear axle disc brake's semi-axis structure, includes semi-axis, rim, bridge pipe, brake disc, bearing cap, its characterized in that: the brake caliper comprises a caliper body, brake linings are connected to two sides of the caliper body in a sliding fit manner, one end of the bridge pipe is connected with the half shaft, the brake disc is connected to the half shaft through the transition disc, the bearing cover is connected with the bearing seat through the connecting bolt, a spacer bush, a first half shaft bearing and a second half shaft bearing are respectively arranged on the inner wall of the bearing seat, the spacer bush is arranged between the first half shaft bearing and the second half shaft bearing, the spacer bush is respectively used for positioning the first half shaft bearing and the second half shaft bearing, and the first half shaft bearing and the second half shaft bearing are axially positioned, the brake device comprises a half shaft bearing I, a half shaft bearing II, a brake disc, a transition disc, a brake caliper, a brake disc and a brake caliper.