CN114251373A

CN114251373A - Zero-clearance assembly method for back-to-back tapered roller bearing

Info

Publication number: CN114251373A
Application number: CN202111434570.8A
Authority: CN
Inventors: 冷兆权; 常达伟; 许杰; 葛虎群; 何群松
Original assignee: Shanghai Komman Vehicle Component Systems Stock Co ltd
Current assignee: Shanghai Komman Vehicle Component Systems Stock Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-03-29
Anticipated expiration: 2041-11-29
Also published as: CN114251373B

Abstract

The invention relates to a zero-clearance assembly method of a back-to-back tapered roller bearing, which comprises the following steps of: sequentially attaching the inner ring of the first bearing to be assembled, the spacer bush and the inner ring of the second bearing to obtain the distance from the outer side of the inner ring of the first bearing to the outer side of the inner ring of the second bearing, and recording the distance as T1; mounting the first bearing and the second bearing in a bearing mounting hole of a bearing seat to obtain T2; the measured play value T is T2-T1+ alpha; selecting two gaskets with the thickness of T/2 respectively; and assembling the first bearing, the second bearing, the spacer bush and the gasket into the bearing mounting hole of the bearing seat. The assembly method is simple, scientific and effective, and solves the batch production problem of zero-clearance assembly of the back-to-back tapered roller bearing; according to the assembling method, the clearance value of the back-to-back tapered roller bearing during assembling is obtained firstly, and the proper gasket is selected according to the clearance value, so that the assembling efficiency of the back-to-back tapered roller bearing with zero clearance is improved, the assembling difficulty is reduced, and the consistency and the stability of the product are improved.

Description

Zero-clearance assembly method for back-to-back tapered roller bearing

Technical Field

The invention relates to the technical field of assembly of back-to-back tapered roller bearings, in particular to a zero-clearance assembly method of a back-to-back tapered roller bearing.

Background

The automotive industry is a long-history, mass-produced, relatively mature traditional industry, and the production of its components must be fast and efficient because of this feature, although the alteration of the classical design has great economic value, some component designs with long history still become the current norm within the industry. Certain classical designs also do not become obsolete designs that do not meet the current state of the art of contemporary related technology, such as the application of back-to-back assembly of tapered roller bearings in commercial vehicle independent suspensions.

The independent suspension bearing seat of the commercial vehicle is connected with the upper swing arm and the lower swing arm by using the tapered roller bearing, a back-to-back assembly mode is adopted, the bearing capacity and the overturning resistance capacity of the assembly mode are stronger, but the bearing clearance adjustment is complex, and the batch production and the use are difficult. The use working condition of the assembly mode is large load and low rotating speed, so the influence of temperature on the clearance can be ignored, the clearance used in the assembly mode is in a zero clearance state according to the recommended experience and verification result of a bearing manufacturer, and the tolerance control range is + 0.03/-0.02. The structure form of the product is as follows: bosses are arranged in the bearing mounting holes, outer rings of the two bearings are respectively abutted against two sides of the bosses, and spacer bushes and gaskets are arranged in the middles of inner rings of the two bearings. The common assembling mode is an empirical assembling mode, namely, a group of gaskets are firstly selected to be installed between the inner rings of the two bearings and are screwed, the pin shaft is rotated, if the pin shaft has a clamping stagnation phenomenon, the gaskets are too thin, thicker gaskets need to be selected, and then the screwing test is carried out; if manually rock the round pin axle, axial clearance is great, then the gasket is too thick, needs attenuate gasket thickness, and this kind of assembly methods is inefficient, and the subjectivity is great, is difficult to guarantee the uniformity and the stability of product, and it is mainly because the play value when back-to-back tapered roller bearing assembles is difficult to measure, leads to the selection of gasket more difficult.

Therefore, it is necessary to provide a new zero-play assembly method for back-to-back tapered roller bearings to solve the above technical problems.

Disclosure of Invention

The invention aims to provide a zero-clearance assembly method of a back-to-back tapered roller bearing, which can simply obtain a clearance value when the back-to-back tapered roller bearing is assembled and further select a gasket with proper thickness, so that the zero-clearance assembly efficiency of the back-to-back tapered roller bearing is improved, the assembly difficulty is reduced, and the consistency and the stability of a product are improved.

In order to achieve the purpose, the invention adopts a technical scheme that:

a zero-play assembly method for a back-to-back tapered roller bearing comprises the following steps:

the method comprises the following steps that firstly, an inner ring of a first bearing to be assembled, a spacer bush and an inner ring of a second bearing are sequentially attached to one another, and the distance from the outer side of the inner ring of the first bearing to the outer side of the inner ring of the second bearing is recorded as T1;

step two, mounting the first bearing and the second bearing in a bearing mounting hole of a bearing seat, wherein a boss is arranged in the bearing mounting hole of the bearing seat, the thickness of the boss is equal to that of the spacer bush, an outer ring of the first bearing and an outer ring of the second bearing are respectively abutted against two sides of the boss, axial pressure towards the boss direction is applied to the inner ring of the first bearing and the inner ring of the second bearing while the inner ring of the first bearing and the inner ring of the second bearing rotate, the distance from the outer side of the inner ring of the first bearing to the outer side of the inner ring of the second bearing is obtained and is marked as T2, and the first bearing and the second bearing are taken out of the bearing mounting hole of the bearing seat;

step three, according to the T1 of the step one and the T2 of the step two, the measured play value T is T2-T1+ alpha, wherein alpha is a compensation value, and two gaskets with the thickness of T/2 are selected;

and step four, assembling the first bearing, the second bearing, the spacer bush and the two gaskets selected in the step three into a bearing mounting hole of the bearing seat, wherein the outer ring of the first bearing and the outer ring of the second bearing are respectively abutted against two sides of the boss of the bearing seat, the two gaskets are respectively positioned on the inner sides of the inner ring of the first bearing and the inner ring of the second bearing, and the spacer bush is positioned between the two gaskets.

Preferably, in the first step, the inner ring of the first bearing, the spacer bush, and the inner ring of the second bearing to be assembled are sequentially attached, and a set axial pressure is applied to the inner ring of the first bearing and the inner ring of the second bearing, so as to obtain a distance from the outer side of the inner ring of the first bearing to the outer side of the inner ring of the second bearing, which is denoted as T1.

Preferably, in the first step, a set axial pressure is applied to the inner race of the first bearing and the inner race of the second bearing while the inner races of the first bearing and the second bearing rotate.

Preferably, in the first step and the second step, the axial pressure is determined according to the size of the outer ring of the first bearing and the outer ring of the second bearing.

Preferably, in the first step, the inner ring of the first bearing and the inner ring of the second bearing are respectively sleeved at the end portions of the first rotating shaft and the second rotating shaft which can have the same direction, the spacer bush is placed between the inner ring of the first bearing and the inner ring of the second bearing, so that the inner ring of the first bearing, the spacer bush and the inner ring of the second bearing are sequentially attached to each other, the first rotating shaft and the second rotating shaft respectively drive the inner ring of the first bearing and the inner ring of the second bearing to rotate, and meanwhile, a set axial pressure is applied to the inner ring of the first bearing and the inner ring of the second bearing, and a sensor assembly is used to obtain a distance from the outer side of the inner ring of the first bearing to the outer side of the inner ring of the second bearing, that is, T1 is obtained.

Preferably, in the second step, the outer ring of the first bearing and the outer ring of the second bearing are installed in the bearing installation hole of the bearing seat, the inner ring of the first bearing and the inner ring of the second bearing are respectively sleeved at the end portions of the first rotating shaft and the second rotating shaft, the first rotating shaft and the second rotating shaft are moved to enable the inner ring of the first bearing and the inner ring of the second bearing to be respectively assembled into the outer ring of the first bearing and the outer ring of the second bearing, the set axial pressure is applied to the inner ring of the first bearing and the inner ring of the second bearing while the first rotating shaft and the second rotating shaft respectively drive the inner ring of the first bearing and the inner ring of the second bearing to rotate, and the sensor assembly is used to obtain the distance from the outer side of the inner ring of the first bearing to the outer side of the inner ring of the second bearing, i.e. T2 is obtained.

Preferably, the second rotating shaft and the sensor assembly are both connected to a movable rack, the first rotating shaft is slidably connected to the rack, the first rotating shaft can drive the inner ring of the first bearing to be close to the inner ring of the second bearing sleeved at the end of the second rotating shaft, and the rack can drive the first rotating shaft and the second rotating shaft to move.

Preferably, the rack is provided with a slide rail, the slide rail is connected with a first slidable slider, the first slider is connected with a support block, the first rotating shaft penetrates through the support block and can rotate in the support block, the support block drives the first rotating shaft to move, the axial pressure is applied through a first cylinder, the output end of the first cylinder is connected with a first telescopic rod, the end part of the first telescopic rod is connected with the support block, the first cylinder drives the first telescopic rod to apply force to the support block, and the support block transmits the force to an inner ring of a first bearing sleeved on the first rotating shaft.

Preferably, the sensor assembly includes a sensor, a second cylinder connected to the frame, a second telescopic rod connected to an output end of the second cylinder, and a moving block connected to an end of the second telescopic rod, and the sensor is connected to the moving block.

Preferably, the sensor assembly further comprises a second sliding block connected to the frame, a guide rod penetrating through the second sliding block, and a limiting block connected to an end of the guide rod, and the moving block is wrapped on the guide rod and connected to the second sliding block.

Compared with the prior art, the assembly method of the back-to-back tapered roller bearing with zero clearance has the beneficial effects that: the assembly method is simple, scientific and effective, and solves the batch production problem of zero-clearance assembly of the back-to-back tapered roller bearing; according to the assembling method, the clearance value of the back-to-back tapered roller bearing during assembling is obtained firstly, and the proper gasket is selected according to the clearance value, so that the assembling efficiency of the back-to-back tapered roller bearing with zero clearance is improved, the assembling difficulty is reduced, and the consistency and the stability of the product are improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic view of an inner race, a spacer, and an inner race of a second bearing of the present invention sequentially attached to each other;

FIG. 2 is a schematic view of a back-to-back tapered roller bearing of the present invention during zero-clearance assembly;

FIG. 3 is a schematic view of a measuring device of the present invention;

FIG. 4 is a schematic view of a measuring device of the present invention connecting the inner race of a first bearing and the inner race of a second bearing;

FIG. 5 is a schematic view of a support block of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, the assembly method of the back-to-back tapered roller bearing zero clearance according to the present invention is characterized in that the assembly working condition of the back-to-back tapered roller bearing zero clearance is a large load and a low rotation speed, so that the influence of temperature on the clearance is negligible, and the assembly method of the back-to-back tapered roller bearing zero clearance includes the following steps:

step one, please refer to fig. 1, sequentially attaching the inner ring of the first bearing 1, the spacer 3, and the inner ring of the second bearing 2 to be assembled, to obtain a distance from the outer side of the inner ring of the first bearing 1 to the outer side of the inner ring of the second bearing 2, which is denoted as T1, or obtaining thickness values of the inner ring of the first bearing 1, the spacer 3, and the inner ring of the second bearing 2, respectively, and recording the sum of the thickness values of the three as T1, see fig. 2, where T1 is a1+ a2+ B;

specifically, an inner ring of the first bearing 1 to be assembled, the spacer 3 and an inner ring of the second bearing 2 are sequentially attached, and a set axial pressure is applied to the inner ring of the first bearing 1 and the inner ring of the second bearing 2, so that a distance from the outer side of the inner ring of the first bearing 1 to the outer side of the inner ring of the second bearing 2 is obtained and is marked as T1; applying a set axial pressure to the inner ring of the first bearing 1 and the inner ring of the second bearing 2 to eliminate the clearance between the inner ring of the first bearing 1, the inner ring of the second bearing 2 and the spacer 3, so that the measured T1 value is more accurate;

specifically, while the inner ring of the first bearing 1 and the inner ring of the second bearing 2 rotate, a set axial pressure is applied to the inner ring of the first bearing 1 and the inner ring of the second bearing 2; the design can better simulate the working state of the first bearing 1 and the second bearing 2, so that the measured T1 value is more accurate, and the error is reduced;

specifically, please refer to fig. 3 and 4, the inner ring of the first bearing 1 and the inner ring of the second bearing 2 are respectively sleeved at the end portions of the first rotating shaft 71 and the second rotating shaft 81 which can have coaxial directions, the spacer 3 is placed between the inner ring of the first bearing 1 and the inner ring of the second bearing 2, so that the inner ring of the first bearing 1, the spacer 3 and the inner ring of the second bearing 2 are sequentially attached, the first rotating shaft 71 and the second rotating shaft 81 respectively drive the inner ring of the first bearing 1 and the inner ring of the second bearing 2 to rotate, and simultaneously, the inner ring of the first bearing 1 and the inner ring of the second bearing 2 are applied with a set axial pressure, and the sensor assembly 9 is used to obtain a distance from the outer side of the inner ring of the first bearing 1 to the outer side of the inner ring of the second bearing 2, that is T1;

step two, please refer to fig. 2, the first bearing 1 and the second bearing 2 are installed in a bearing installation hole of the bearing seat 5, a boss 51 is arranged in the bearing installation hole of the bearing seat 5, the thickness of the boss 51 is equal to the thickness of the spacer 3, the outer ring of the first bearing 1 and the outer ring of the second bearing 2 are respectively abutted against two sides of the boss 51, axial pressure towards the boss 51 direction is applied to the inner ring of the first bearing 1 and the inner ring of the second bearing 2 while the inner ring of the first bearing 1 and the inner ring of the second bearing 2 rotate, measurement errors caused by the fact that the inner rings of the first bearing 1 and the second bearing 2 are not installed in place are prevented, at this time, the distance from the outer side of the inner ring of the first bearing 1 to the outer side of the inner ring of the second bearing 2 is obtained and is marked as T2, and the first bearing 1 and the second bearing 2 are taken out of the bearing installation hole of the bearing seat 5;

specifically, in the first step and the second step, the axial pressure is determined according to the sizes of the outer ring of the first bearing 1 and the outer ring of the second bearing 2; for example, when the diameters of the outer ring of the first bearing 1 and the outer ring of the second bearing 2 are 45-90 mm, the axial pressure is 10 kg;

specifically, referring to fig. 2 to 4, an outer ring of the first bearing 1 and an outer ring of the second bearing 2 are installed in a bearing installation hole of the bearing seat 5, an inner ring of the first bearing 1 and an inner ring of the second bearing 2 are respectively sleeved at ends of the first rotating shaft 71 and the second rotating shaft 81, the first rotating shaft 71 and the second rotating shaft 81 are moved to enable the inner ring of the first bearing 1 and the inner ring of the second bearing 2 to be respectively assembled into the outer ring of the first bearing 1 and the outer ring of the second bearing 2, while the first rotating shaft 71 and the second rotating shaft 81 respectively drive the inner ring of the first bearing 1 and the inner ring of the second bearing 2 to rotate, a set axial pressure is applied to the inner ring of the first bearing 1 and the inner ring of the second bearing 2, and a distance from an outer side of the inner ring of the first bearing 1 to an outer side of the inner ring of the second bearing 2 is obtained by using the sensor assembly 9, i.e. T2 is obtained;

step three, according to the T1 of the step one and the T2 of the step two, the measured play value T is T2-T1+ alpha, wherein alpha is a compensation value; because the outer ring of the first bearing 1 and the outer ring of the second bearing 2 need to be fitted into the bearing mounting holes of the bearing seat 5 in an interference manner, the outer ring of the first bearing 1 and the outer ring of the second bearing 2 are easily deformed, and a certain degree of error exists when the T1 is obtained in the first step and the T2 is obtained in the second step, α is used as a compensation value; obtaining alpha by means of the T1 obtained in the first step and the T2 obtained in the second step, measuring alpha is T1-T2+ D (D is a thickness value of a selected reasonable gasket, and D is equal to the play value T), selecting the gasket by adopting an empirical assembly mentioned in the background technology, namely selecting two gaskets with equal thickness to be respectively assembled on the inner sides of the inner ring of the first bearing 1 and the inner ring of the second bearing 2, arranging a spacer between the two gaskets, rotating the pin shaft, enabling the pin shaft to rotate smoothly, measuring the starting torque of the pin shaft to enable the axial displacement of the pin shaft to be not more than 0.03mm, confirming that the two gaskets are selected reasonably, and measuring the total thickness value of the two gaskets to be D; according to the clearance value T, two gaskets 4 with the thickness of T/2 are selected;

and step four, assembling the first bearing 1, the second bearing 2, the spacer bush 3 and the two gaskets 4 selected in the step three into a bearing mounting hole of the bearing seat 5, wherein the outer ring of the first bearing 1 and the outer ring of the second bearing 2 are respectively abutted against two sides of a boss 51 of the bearing seat 5, the two gaskets 4 are respectively positioned on the inner sides of the inner ring of the first bearing 1 and the inner ring of the second bearing 2, and the spacer bush 3 is positioned between the gaskets 4.

Specifically, referring to fig. 3 to 5, T1 of the first step and T2 of the second step are both obtained by using a measuring device, the measuring device comprises a movable frame 6, and a first measuring assembly 7 and a second measuring assembly 8 which are connected to the frame 6, a sensor assembly 9 is connected to the movable frame 6, the sensor assembly 9 is located at the side of the second measuring assembly 8, the first measuring assembly 7 is used for connecting an inner ring of the first bearing 1, the second measuring assembly 8 is used for connecting an inner ring of the second bearing 2, and the first measuring assembly 7 and the second measuring assembly 8 correspond to each other, so that the inner ring of the first bearing 1 and the inner ring of the second bearing 2 can be close to each other; the frame 6 is movably arranged and can move with the first measuring component 7, the second measuring component 8 and the sensor component 9, so that the whole measuring device can reach the bearing seat, the frame 6 can drive the first rotating shaft 71 and the second rotating shaft 81 to move, so that the first rotating shaft 71 with the inner ring of the first bearing 1 and the second rotating shaft 81 with the inner ring of the second bearing 2 can reach the bearing seat, and T2 is obtained conveniently.

Referring to fig. 3 and 4, the frame 6 includes a top frame 61, a first vertical frame 62 and a second vertical frame 63 respectively connected to both ends of the top frame 61, and a first horizontal frame 64 and a second horizontal frame 65 respectively connected to an end of the first vertical frame 62 and an end of the second vertical frame 63, the first measuring unit 7 is connected to the first horizontal frame 64, and the second measuring unit 8 and the sensor unit 9 are connected to the second horizontal frame 65.

Referring to fig. 3 and 4, the first measuring assembly 7 includes a first rotating shaft 71 slidably connected to the frame 6, a first rotating motor 72 driving the first rotating shaft 71 to rotate, and a first cylinder 73 connected to the frame 6, an inner ring of the first bearing 1 is sleeved at an end of the first rotating shaft 71, the first cylinder 73 is used for applying axial pressure to the inner ring of the first bearing 1, and during operation, the first rotating shaft 71 can drive the inner ring of the first bearing 1 to approach an inner ring of the second bearing 2 sleeved at an end of the second rotating shaft 81, so as to obtain T1 and T2; according to the working requirement, the first rotating motor 72 can be started to drive the first rotating shaft 71 to rotate, so as to drive the inner ring of the first bearing 1 to rotate, and meanwhile, according to the working requirement, the first air cylinder 73 can apply the set axial pressure to the inner ring of the first bearing 1. Specifically, the first rotating shaft 71 is slidably coupled to the first cross member 64, and the first cylinder 73 is coupled to an end portion of the first cross member 64.

Specifically, the first measuring assembly 7 further includes a slide rail 74 mounted on the frame 6, a first slide block 75 slidably connected to the slide rail 74, and a support block 76 connected to the first slide block 75, the first rotating shaft 71 penetrates through the support block 76 and can rotate in the support block 76, an output end of the first rotating motor 72 is connected to the first rotating shaft 71, an output end of the first air cylinder 73 is connected to a first telescopic rod 77, and an end of the first telescopic rod 77 is connected to the support block 76. When the device works, the supporting block 76 drives the first rotating shaft 71 to move, when the supporting block 76 moves, the first sliding block 75 moves along the sliding rail 74, so that the stability of the supporting block 76 during moving is improved, the length of the sliding rail 74 is determined according to the distance between the first measuring component 7 and the second measuring component 8, so that the inner ring of the first bearing 1 sleeved at the end part of the first rotating shaft 71 can be close to the inner ring of the second bearing 2 sleeved at the end part of the second rotating shaft 81, and the first sliding block 75 does not depart from the sliding rail 74; axial pressure is applied through the first air cylinder 73, the first air cylinder 73 drives the first telescopic rod 77 to apply force to the supporting block 76, the supporting block 76 transmits the force to the inner ring of the first bearing 1 sleeved on the first rotating shaft 71, and the first air cylinder 73 applies set axial pressure to the inner ring of the first bearing 1.

Specifically, referring to fig. 5, the supporting block 76 includes a cross block 761 connected to the slider 75, and a first vertical block 762 and a second vertical block 763 connected to the cross block 761, the second vertical block 763 is connected to an end of the cross block 761, the first rotating shaft 71 penetrates through the first vertical block 762 and the second vertical block 763, and an end of the first telescopic rod 77 is connected to a side of the first vertical block 762. In order to ensure that the first extension rod 77 applies a better force to the support block 76, the support block 76 further comprises a reinforcement block 764 connected between the first upright 762 and the second upright 763.

Specifically, please refer to fig. 3 and 4, the first measuring assembly 7 further includes a first disc 79 sleeved on the periphery of the first rotating shaft 71, when in operation, the inner ring of the first bearing 1 is located on the side of the first disc 79, and the first disc 79 can play a role in limiting, so that the inner ring of the first bearing 1 is sleeved on the end of the first rotating shaft 71, and the inner ring of the first bearing 1 is easily close to the inner ring of the second bearing 2 within a certain range.

Referring to fig. 3 and 4, the second measuring assembly 8 includes a second rotating shaft 81 connected to the frame 6 and a second rotating motor 82 driving the second rotating shaft 81 to rotate, and an inner ring of the second bearing 2 is sleeved on the second rotating shaft 81, so that the second rotating motor 82 drives the second rotating shaft 81 to rotate according to working requirements, and drives the inner ring of the second bearing 2 to rotate. Specifically, the second rotating shaft 81 penetrates the second cross frame 65, and the second rotating electric machine 82 is connected to an end portion of the second cross frame 65.

Specifically, the second measuring assembly 8 further includes a speed reduction motor 83 connected to the second rotating motor 82, and the second rotating shaft 81 is connected to an output end of the speed reduction motor 83.

Specifically, the second measuring assembly 8 further comprises a second disc 84 sleeved on the periphery of the second rotating shaft 81, when the second measuring assembly works, the inner ring of the second bearing 2 is located on the side edge of the second disc 84, and the second disc 84 can play a limiting role, so that the inner ring of the second bearing 1 is sleeved on the end portion of the second rotating shaft 81, and the inner ring of the first bearing 1 is easily close to the inner ring of the second bearing 2.

Referring to fig. 3 and 4, the sensor assembly 9 for measuring T1 and T2 includes a sensor 91 movably attached to the frame 6, the sensor 91 being movable to the first disk 79 to measure T1 and T2. Specifically, sensor 91 is movably coupled to second cross frame 65.

Specifically, the sensor assembly 9 further includes a second cylinder 92 connected to the frame 6, a second telescopic rod 93 connected to an output end of the second cylinder 92, and a moving block 94 connected to an end of the second telescopic rod 93, the sensor 91 is connected to the moving block 94, and in operation, the second cylinder 92 drives the second telescopic rod 93 to stretch and retract, so that the moving block 94 drives the sensor 91 to move, and the sensor 91 is movably connected to the frame 6.

Specifically, the sensor assembly 9 further includes a second slider 95 connected to the frame 6, a guide rod 96 penetrating through the second slider 95, and a limit block 97 connected to an end of the guide rod 96, the moving block 94 is wrapped on the guide rod 96 and is connected to the second slider 95, when the moving block 94 moves, the moving block can move along the guide rod 96, and meanwhile, the second slider 95 slides along the frame 6, so that stability when the sensor 91 moves is ensured, and measurement accuracy of the sensor 91 is ensured.

In order to realize the automatic control of the measuring device of this embodiment, please refer to fig. 3 and 4, a first start key 66, a first stop key 67, a second start key 68 and a second stop key 69 are provided on the frame 1, the first start key 66 is used for controlling the start of the first rotating electric machine 72 and the first air cylinder 73, so that the first rotating electric machine 72 and the first air cylinder 73 can be started at the same time or at set time intervals according to requirements; the first stop key 67 is used to control the stop operations of the first rotating electric machine 72 and the first air cylinder 73 so that the first rotating electric machine 72 and the first air cylinder 73 can be stopped at the same time or at set time intervals according to the requirements; the second start key 68 is used to control the start of the second rotating electric machine 82 and the second air cylinder 92 so that they are started at a set time interval; the second stop key 69 is used for stopping the operation of the second rotating electrical machine 82 and the second air cylinder 92.

Referring to fig. 1 to 5, the working principle of the measuring device of the present embodiment is as follows:

1. respectively sleeving the inner ring of the first bearing 1 and the inner ring of the second bearing 2 at the end parts of a first rotating shaft 71 and a second rotating shaft 81, attaching the spacer 3 to the inner ring of the second bearing 2 (or attaching the spacer to the inner ring of the first bearing 1, in this embodiment, because the inner ring of the first bearing 1 needs to move along with the first rotating shaft 71, the spacer 3 is selected to be attached to the inner ring of the second bearing 2), moving the first rotating shaft 71 to drive the inner ring of the first bearing 1 to be attached to the spacer 3 (the positions of the inner ring of the second bearing 2 and the spacer 3 are kept still), and completing that the inner ring of the first bearing 1, the spacer 3 and the inner ring of the second bearing 2 are sequentially attached; the sensor assembly 9 obtains the distance from the outer side of the inner race of the first bearing 1 to the outer side of the inner race of the second bearing 2, i.e., T1; when the sensor assembly 9 obtains T1, the first rotating shaft 71 may drive the inner ring of the first bearing 1 to rotate and the second rotating shaft 81 may drive the inner ring of the second bearing 2 to rotate according to the working requirement, or the first cylinder 73 may be used to apply an axial pressure to the inner ring of the first bearing 1 according to the working requirement;

2. respectively installing the outer ring of the first bearing 1 and the outer ring of the second bearing 2 into the bearing installation holes of the bearing seat 5, respectively abutting the outer ring of the first bearing 1 and the outer ring of the second bearing 2 on two sides of the boss 51, then moving the whole measuring device to enable the inner ring of the first bearing 1 sleeved on the first rotating shaft 71 and the inner ring of the second bearing 2 sleeved on the second rotating shaft 81 to be respectively assembled into the outer ring of the first bearing 1 and the outer ring of the second bearing 2, while the inner ring of the first bearing 1 and the inner ring of the second bearing 2 are rotated, a set axial pressure is applied to the inner ring of the first bearing 1 and the inner ring of the second bearing 2 using the first cylinder 73, since the lateral position of the inner ring of the second bearing 2 is kept stationary, it is possible to realize that the first cylinder 73 applies a set axial pressure to the inner ring of the first bearing 1 and the inner ring of the second bearing 2; the sensor assembly 9 obtains the distance from the outside of the inner race of the first bearing 1 to the outside of the inner race of the second bearing 2, i.e., T2.

The assembly method of the back-to-back tapered roller bearing with zero clearance is simple, scientific and effective, and solves the problem of batch production of the back-to-back tapered roller bearing with zero clearance assembly; according to the assembling method, the clearance value of the back-to-back tapered roller bearing during assembling is obtained firstly, and the proper gasket is selected according to the clearance value, so that the assembling efficiency of the back-to-back tapered roller bearing with zero clearance is improved, the assembling difficulty is reduced, and the consistency and the stability of the product are improved.

Of course, those skilled in the art will recognize that the above-described embodiments are illustrative only, and not intended to be limiting, and that changes and modifications may be made thereto without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A zero-clearance assembly method for a back-to-back tapered roller bearing is characterized by comprising the following steps:

2. The method for assembling a back-to-back tapered roller bearing with zero play as claimed in claim 1, wherein in the first step, the inner ring of the first bearing, the spacer bush, and the inner ring of the second bearing to be assembled are sequentially attached, and a set axial pressure is applied to the inner ring of the first bearing and the inner ring of the second bearing, so as to obtain a distance, denoted as T1, from the outer side of the inner ring of the first bearing to the outer side of the inner ring of the second bearing.

3. The method for assembling a back-to-back tapered roller bearing with zero play according to claim 2, wherein in the first step, the inner ring of the first bearing and the inner ring of the second bearing rotate while applying a set axial pressure to the inner ring of the first bearing and the inner ring of the second bearing.

4. A method of assembling a back-to-back tapered roller bearing with zero play as claimed in claim 3, wherein in said first step and said second step, said axial pressure is determined in accordance with the dimensions of the outer race of said first bearing and the outer race of said second bearing.

5. The method for assembling a back-to-back tapered roller bearing with zero play as claimed in claim 1, wherein in the first step, the inner ring of the first bearing and the inner ring of the second bearing are respectively sleeved on the ends of a first rotating shaft and a second rotating shaft which can have a coaxial direction, the spacer is placed between the inner ring of the first bearing and the inner ring of the second bearing, so that the inner ring of the first bearing, the spacer and the inner ring of the second bearing are sequentially attached to each other, while the first rotating shaft and the second rotating shaft respectively drive the inner ring of the first bearing and the inner ring of the second bearing to rotate, a set axial pressure is applied to the inner ring of the first bearing and the inner ring of the second bearing, and a sensor assembly is used to obtain the distance from the outer side of the inner ring of the first bearing to the outer side of the inner ring of the second bearing, i.e. T1 is obtained.

6. The method according to claim 5, wherein in the second step, the outer ring of the first bearing and the outer ring of the second bearing are mounted in the bearing mounting hole of the bearing seat, the inner ring of the first bearing and the inner ring of the second bearing are respectively sleeved at the ends of the first rotating shaft and the second rotating shaft, the first rotating shaft and the second rotating shaft are moved to enable the inner ring of the first bearing and the inner ring of the second bearing to be respectively assembled into the outer ring of the first bearing and the outer ring of the second bearing, and the first rotating shaft and the second rotating shaft respectively drive the inner ring of the first bearing and the inner ring of the second bearing to rotate while applying the set axial pressure to the inner ring of the first bearing and the inner ring of the second bearing, the distance from the outside of the inner race of the first bearing to the outside of the inner race of the second bearing is obtained using the sensor assembly, i.e., T2 is obtained.

7. The method as claimed in claim 6, wherein the second rotating shaft and the sensor assembly are both connected to a movable frame, the first rotating shaft is slidably connected to the frame, the first rotating shaft can drive the inner ring of the first bearing to approach the inner ring of the second bearing sleeved on the end of the second rotating shaft, and the frame can drive the first rotating shaft and the second rotating shaft to move.

8. The method according to claim 7, wherein the rack is provided with a slide rail, the slide rail is connected with a first slide block that is slidable, the first slide block is connected with a support block, the first rotating shaft penetrates through the support block and can rotate in the support block, the support block drives the first rotating shaft to move, the axial pressure is applied through a first cylinder, an output end of the first cylinder is connected with a first telescopic rod, an end of the first telescopic rod is connected with the support block, the first cylinder drives the first telescopic rod to apply force to the support block, and the support block transmits the force to the inner ring of the first bearing sleeved on the first rotating shaft.

9. The method for assembling a back-to-back tapered roller bearing with zero backlash as claimed in claim 8, wherein the sensor assembly includes a sensor, a second cylinder connected to the frame, a second telescopic rod connected to an output end of the second cylinder, and a moving block connected to an end of the second telescopic rod, and the sensor is connected to the moving block.

10. The method for assembling a back-to-back tapered roller bearing with zero play as claimed in claim 9, wherein the sensor assembly further comprises a second slider connected to the frame, a guide rod penetrating through the second slider, and a stop block connected to an end of the guide rod, and the stop block is wrapped on the guide rod and connected to the second slider.