CN217192624U

CN217192624U - Centering tool for machining bearing seat

Info

Publication number: CN217192624U
Application number: CN202221232263.1U
Authority: CN
Inventors: 曾宪金; 王亚平; 杨俊杰; 王开富
Original assignee: Chongqing City Rongchang District Jinyi Casting Co ltd
Current assignee: Chongqing City Rongchang District Jinyi Casting Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-08-16
Anticipated expiration: 2032-05-20

Abstract

The utility model discloses a centering tool for processing bearing seats, which comprises a base detachably connected with a chuck of a lathe, a centering shaft arranged on the base, an elastic self-resetting mechanism sleeved on the centering shaft, a clamping jaw fixing assembly distributed above the elastic self-resetting mechanism and movably connected with the centering shaft, and a locking mechanism arranged above the clamping jaw fixing assembly and connected with the centering shaft for controlling the position of the clamping jaw fixing assembly, wherein the clamping jaw fixing assembly comprises a centering support sleeved with the centering shaft and at least three supporting clamping jaws distributed at equal intervals around the centering support, two ends of each supporting clamping jaw are respectively movably connected with the centering support and the centering shaft, the centering support slides up and down along the height direction of the centering shaft to drive the supporting clamping jaws to fold and unfold, when all the supporting clamping jaws are unfolded, the bearing seats are fixed with the chuck of the lathe, and the automatic centering alignment can be realized by unfolding the supporting clamping jaws, repeated adjustment is not needed, and positioning is accurate and convenient, so that defective products can be reduced, and the working efficiency is improved.

Description

Centering tool for machining bearing seat

Technical Field

The utility model belongs to the technical field of the bearing frame processing, concretely relates to bearing frame processing is with centering frock.

Background

The bearing is an important part in the modern mechanical equipment, and the main function of the bearing is to support a mechanical rotating body, reduce the friction coefficient in the movement process of the mechanical rotating body and ensure the rotation precision of the mechanical rotating body. The inner support point of the bearing is a shaft, and the outer support is a bearing seat. The bearing is circular, and therefore the bearing frame also is circular structure or semi-circular structure with bearing contact portion, in the bearing frame course of working, need do accurate positioning to the bearing frame and can further carry out the finish machining.

In the prior art, a bearing seat is fixed on a lathe chuck through a chuck self-carrying clamp, the center of a shaft hole is usually aligned in a visual inspection or tool measurement mode, and then the position is adjusted on the lathe chuck to realize accurate positioning. However, such a positioning processing method is prone to generate errors, waste products are easily cut during rotational processing, and the operation is very complicated, thereby reducing the work efficiency.

SUMMERY OF THE UTILITY MODEL

There is the inconvenient technical problem in location to prior art, the utility model provides a bearing frame processing is with centering frock.

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

a centering tool for machining a bearing seat comprises a base detachably connected with a chuck of a clamping machine, a centering shaft arranged on the base, an elastic self-resetting mechanism sleeved on the centering shaft, a clamping jaw fixing assembly distributed above the elastic self-resetting mechanism and movably connected with the centering shaft, and a locking mechanism arranged above the clamping jaw fixing assembly and connected with the centering shaft for controlling the position of the clamping jaw fixing assembly, wherein the clamping jaw fixing assembly comprises a centering support sleeved with the centering shaft and at least three supporting clamping jaws distributed around the centering support at equal intervals, two ends of each supporting clamping jaw are respectively movably connected with the centering support and the centering shaft, the centering support slides up and down along the height direction of the centering shaft so as to drive the supporting clamping jaws to fold and unfold, and when all the supporting clamping jaws are unfolded, and fixing the bearing seat on a lathe chuck for processing.

Furthermore, the centering shaft comprises a main shaft and a connecting chassis fixedly connected with the main shaft, the main shaft is vertically connected above the connecting chassis, the bottom surface of the connecting chassis is connected with the base, three connecting parts which are arranged at equal intervals are arranged on the connecting chassis, and the supporting claws are movably connected in the connecting parts.

Furthermore, each connecting part is internally provided with a U-shaped cavity, and the supporting clamping jaws are movably connected with the U-shaped cavities.

Further, the centering support include with main sleeve and rigid coupling that the main shaft cup jointed in the connection journal stirrup of main sleeve outer wall, it has three and is equidistant interval and centers on to connect the journal stirrup the main sleeve arranges, and is a plurality of it is with a plurality of to connect the journal stirrup the position of U die cavity is the one-to-one respectively.

Furthermore, the supporting jaw comprises a jaw piece which is abutted against the inner wall of the shaft hole of the bearing seat and a connecting rod assembly which connects the jaw piece with the connecting lug and the U-shaped cavity; the clamping jaw piece comprises a propping block and a connecting wing which is fixedly connected to the inner wall of the propping block and is arranged along the height direction of the propping block; the connecting rod assembly comprises two first connecting rod groups and a second connecting rod, one end of one first connecting rod group is in shaft connection with the upper part of the connecting support lug, the other end of the one first connecting rod group is in shaft connection with the upper part of the connecting wing, one end of the other first connecting rod group is in shaft connection with the lower part of the connecting support lug, the other end of the other first connecting rod group is in shaft connection with the lower part of the connecting wing, and when the supporting clamping jaws are in an unfolded state, the two first connecting rod groups are arranged in parallel; one end of the second connecting rod is coupled in the U-shaped cavity, and the other end of the second connecting rod is coupled with the first connecting rod group close to the lower part of the connecting support lug.

Further, the abutting block is of an arc-shaped structure.

Furthermore, the first connecting rod group comprises two first connecting rods which are oppositely arranged, and the connecting lug and the connecting wing are connected between the two first connecting rods through a rotating shaft.

Further, the base is of a cylindrical structure.

Further, the elastic self-resetting mechanism is a spring.

Furthermore, the locking mechanism comprises a locking nut in threaded connection with the centering support and supporting rods in threaded connection with the outer wall of the locking nut, and the number of the supporting rods is at least three and the supporting rods are arranged at equal intervals.

To sum up, the beneficial effects of the utility model are that: the entire process of securing the workpiece requires only approximately three steps: 1. clamping the centering tool with a lathe chuck; 2. sleeving a bearing seat to be machined on a centering tool; 3. and rotating the locking nut to operate the supporting clamping jaw to stretch and tighten to fix the bearing seat. After the support jack catch struts, because this centering frock is originally fixed in lathe chuck's the centre of a circle, the bearing frame of waiting to process is fixed with the centering frock again, adopts the triangulation locating principle, and centering frock automatic centering need not debug repeatedly or measure the centre of a circle of finding the axle hole, easy dismounting fixes a position accurately, helps promoting work efficiency and ensures accurate processing.

Drawings

Fig. 1 is a schematic structural view of a centering tool for machining a bearing seat according to the present invention.

Fig. 2 is a schematic perspective view of fig. 1 in another direction.

Fig. 3 is a schematic perspective view of the centering shaft of the present invention.

Fig. 4 is a schematic perspective view of the connecting rod assembly of the present invention.

Fig. 5 is a schematic perspective view of the tightening block of the present invention.

Fig. 6 is a schematic diagram of the state of the center bearing seat fixed to the centering tool of the present invention.

In the figure, 100-base, 200-centering shaft, 210-main shaft, 220-connecting chassis, 221-U cavity, 300-elastic self-resetting mechanism, 400-jaw fixing component, 410-centering support, 411-main sleeve, 412-connecting support lug, 420-supporting jaw, 421-jaw piece, 4211-abutting block, 4212-connecting wing, 422-connecting rod component, 4220-first connecting rod group, 4221-second connecting rod, 4222-first connecting rod, 4223-rotating shaft, 4224-flange nut, 500-locking mechanism, 510-locking nut, 520-supporting rod, 600-bearing seat and 610-spigot step.

Detailed Description

The present invention will be further described with reference to the following specific drawings.

As shown in fig. 1 and 2, the utility model provides a centering frock is used in bearing frame processing, include with the base 100 of lathe chuck spiro union or joint, locate centering shaft 200 on the base 100, cup joint in elasticity on the centering shaft 200 is from canceling release mechanical system 300, distribute in elasticity from canceling release mechanical system 300 top and with centering shaft 200 swing joint's jack catch fixed component 400 and locate jack catch fixed component 400 top and with centering shaft 200 is connected in order to be used for control the locking mechanism 500 in jack catch fixed component 400 position. The jaw fixing assembly 400 includes a centering support 410 sleeved with the centering shaft 200 and at least three supporting jaws 420 distributed around the centering support 410 at equal intervals, and two ends of the supporting jaws 420 are movably connected with the centering support 410 and the centering shaft 200 respectively. The centering holder 410 slides up and down in the height direction of the centering shaft 200, thereby drawing in and drawing out the supporting jaws 420. When all the supporting jaws 420 are unfolded, the bearing housing 600 is fixed to a lathe chuck for machining. The lathe chuck is a circular disk, a cavity is arranged at the position of the circle center, and the base 100 is clamped in the cavity at the position of the circle center. Before the bearing seat 600 to be processed is not assembled, the supporting jaws 420 are in a folded state, the centering tool is sleeved in the shaft hole of the bearing seat, and the position of the jaw fixing assembly 400 is adjusted through the locking mechanism 500 after the centering tool is positioned in the shaft hole. As shown in fig. 6, when the supporting jaw 420 is in the unfolded state, the unfolded supporting jaw 420 is unfolded to prop against the inner wall of the shaft hole, so that the bearing seat 600 is fixed with the centering tool, the centering tool is installed at the center of the lathe chuck, the center of the shaft hole is automatically centered, and the lathe chuck can accurately finish the turning tool after rotating. Whole positioning process convenient and fast, base 100 just is equivalent to the pivot that shaft hole and lathe chuck aimed at, opens support jack catch 420 and can automatic centering aim at, need not to adjust repeatedly, and the location is accurate convenient for the machining precision also obtains promoting, thereby can make the defective products reduce, and helps promoting work efficiency.

Just because the central hole of lathe chuck is the centre of a circle, consequently base 100 is cylindrical structure, what can laminate with lathe chuck joint.

As shown in fig. 3, the centering shaft 200 includes a main shaft 210 and a connecting base plate 220 fixedly connected to the main shaft 210, and the main shaft 210 is vertically connected above the connecting base plate 220. The spindle 210 is a cylindrical structure, and when the base 100 is connected to a lathe chuck, the axis of a cavity on the lathe chuck is aligned with the axis of the spindle 210. After the base 100 is connected to the lathe chuck, the centering shaft 200 can be used as a center, so that the three supporting jaws 420 are spread apart and fixed, and the centering shaft 200 around the center is also spread out, so that automatic centering is achieved.

The bottom surface of the connection chassis 220 is connected with the base 100, three connection parts are arranged on the connection chassis 220 at equal intervals, and the support claws 420 are movably connected in the connection parts. Each connecting part is internally provided with a U-shaped cavity 221, and the supporting claws 420 are movably connected with the U-shaped cavities 221. The centering support 410 includes a main sleeve 411 sleeved with the main shaft 210 and a connecting lug 412 fixedly connected to an outer wall of the main sleeve 411. The three connecting lugs 412 are arranged around the main sleeve 411 at equal intervals, and the positions of the connecting lugs 412 and the positions of the U-shaped cavities 221 are in one-to-one correspondence. Three supporting claws 420 are connected around the centering shaft 200, and after the three supporting claws 420 are spread by being distributed at equal intervals, three points form 3 fulcrums to be connected with the shaft hole of the bearing seat by utilizing the triangular positioning principle so as to realize the purpose of automatic centering.

The elastic self-resetting mechanism 300 is a spring, the main sleeve 411 moves downwards to press the spring, but when the main sleeve 411 moves away from the elastic self-resetting mechanism 300, the spring returns quickly, and then the centering support 410 can be pushed to return quickly.

The supporting jaw 420 includes a jaw member 421 abutting against an inner wall of the bearing housing shaft hole, and a link assembly 422 connecting the jaw member 421 with the connecting lug 412 and the U-shaped cavity 221. As shown in fig. 5, the jaw member 421 includes a resisting block 4211 and a connecting wing 4212 fixedly connected to an inner wall of the resisting block 4211 and arranged along a height direction of the resisting block 4211. The abutting block 4211 is of an arc-shaped structure, the shape of the semicircular abutting block 4211 can be fit with the shape of the inner wall of the shaft hole, and the abutting block 4211 is propped against the inner wall of the shaft hole tightly after being propped open, so that the fixing is very firm.

As shown in fig. 4, the link assembly 422 includes two first link groups 4220 and a second link 4221, wherein one end of one first link group 4220 is coupled to the upper portion of the connecting lug 412, and the other end is coupled to the upper portion of the connecting wing 4212. One end of the other first link group 4220 is coupled to a lower portion of the connection lug 412, and the other end is coupled to a lower portion of the connection wing 4212. When the support jaws 420 are in the unfolded state, the two first link groups 4220 are arranged in parallel. One end of the second link 4221 is coupled to the U-shaped cavity 221, and the other end is coupled to the first link group 4220 near the lower portion of the connecting lug 412. The first link group 4220 includes two oppositely disposed first links 4222, and the connecting lug 412 and the connecting wing 4212 are both coupled between the two first links 4222 through a rotating shaft 4223. Each connecting support lug 412 is provided with an installation shaft hole which is arranged at an upper and lower interval, the left side and the right side of the connecting support lug 412 are respectively distributed with a first connecting rod 4222, then the first connecting rods 4222 are installed in the installation shaft holes through rotating shafts 4223 to be connected with the connecting support lugs 412 in a shaft coupling mode, and the rotating shafts 4223 after shaft coupling are locked and fixed through threaded flange nuts 4224. According to the above connection manner, the first link 4222 and the connection wing 4212, the second link 4221 and the connection wing 4212 and the U-shaped cavity 221 are movably coupled by installing the rotating shaft 4223 in the corresponding installation shaft hole, so that the support jaw 420 is driven to be folded or unfolded by the link assembly 422.

The locking mechanism 500 comprises a locking nut 510 screwed with the centering support 410 and at least three supporting rods 520 screwed on the outer wall of the locking nut 510, wherein the supporting rods 520 are arranged at equal intervals. The support rod 520 is arranged perpendicular to the outer wall of the lock nut 510, so that the support rod 520 can be held to rotate the lock nut 510 to adjust the locking position.

By adopting the structure, after the centering tool is fixed with a lathe chuck, the bearing seat 600 needs to cut a spigot step 610 lower than the plane of the bearing seat 600 as an example. Bearing frame 600 is with this centering frock suit in the shaft hole, it is rotatory to the direction that is close to base 100 with lock nut 510 to grip branch 520, first connecting rod 4222 and second connecting rod 4221 mutually support and can strut to the direction of bearing frame 600 shaft hole inner wall tightly 4211 this moment, until support the piece 4211 arc surface tightly to support the shaft hole inner wall tightly, after three equidistant support jack catch 420 of arranging all expand, stable firm fixes bearing frame 600, the rotary lathe chuck just utilizes the lathe tool to aim at and cuts out tang step 610. When the bearing housing 600 needs to be removed, the locking nut 510 is rotated to a direction away from the base 100, the elastic self-resetting mechanism 300 is reset, and at this time, the opened supporting jaws 420 are closed and gathered in a direction toward the centering shaft 200, so that the bearing housing 600 can be easily removed. The entire process of centering and securing the workpiece requires only approximately three steps: 1. clamping the centering tool with a lathe chuck; 2. sleeving a bearing seat to be machined on a centering tool; 3. rotating the lock nut 510 operates the support jaws 420 to spread tension and secure the bearing housing 600. The centre of a circle in shaft hole need not debug repeatedly or measure and come the alignment, and the dismouting is swift convenient, and the location is accurate, helps promoting work efficiency and ensures the accuracy of work piece.

The above are only embodiments of the present invention, and the scope of the present invention is not limited thereby.

Claims

1. The utility model provides a bearing frame processing is with centering frock which characterized in that: comprises a base detachably connected with a chuck of a clamping machine, a centering shaft arranged on the base, an elastic self-resetting mechanism sleeved on the centering shaft, a jaw fixing component distributed above the elastic self-resetting mechanism and movably connected with the centering shaft, and a locking mechanism arranged above the jaw fixing component and connected with the centering shaft for controlling the position of the jaw fixing component, the jaw fixing assembly comprises a centering support sleeved with the centering shaft and at least three supporting jaws distributed around the centering support at equal intervals, two ends of the supporting jaw are respectively movably connected with the centering support and the centering shaft, the centering support slides up and down along the height direction of the centering shaft, thereby driving the supporting jaws to fold and unfold, and when all the supporting jaws are in an unfolded state, fixing the bearing seat on a lathe chuck for processing.

2. The centering tool for machining the bearing seat according to claim 1, wherein: the centering shaft comprises a main shaft and a connecting chassis fixedly connected with the main shaft, the main shaft is vertically connected above the connecting chassis, the bottom surface of the connecting chassis is connected with the base, three connecting parts which are arranged at equal intervals are arranged on the connecting chassis, and the supporting clamping jaws are movably connected in the connecting parts.

3. The centering tool for machining the bearing seat according to claim 2, wherein: each connecting part is internally provided with a U-shaped cavity, and the supporting clamping jaws are movably connected with the U-shaped cavities.

4. The centering tool for machining the bearing seat according to claim 3, wherein the centering tool comprises: the centering support include with main sleeve and rigid coupling that the main shaft cup jointed in the connection journal stirrup of main sleeve outer wall, it has three and is equidistant interval and centers on to connect the journal stirrup arrange, and a plurality of it is with a plurality of to connect the journal stirrup the position of U die cavity is the one-to-one respectively.

5. The centering tool for machining the bearing seat as claimed in claim 4, wherein the centering tool comprises: the supporting clamping jaw comprises a clamping jaw piece which is abutted against the inner wall of the shaft hole of the bearing seat and a connecting rod assembly which connects the clamping jaw piece with the connecting support lug and the U-shaped cavity; the clamping jaw piece comprises a propping block and a connecting wing which is fixedly connected to the inner wall of the propping block and is arranged along the height direction of the propping block; the connecting rod assembly comprises two first connecting rod groups and a second connecting rod, one end of one first connecting rod group is in shaft connection with the upper part of the connecting support lug, the other end of the one first connecting rod group is in shaft connection with the upper part of the connecting wing, one end of the other first connecting rod group is in shaft connection with the lower part of the connecting support lug, the other end of the other first connecting rod group is in shaft connection with the lower part of the connecting wing, and when the supporting clamping jaws are in an unfolded state, the two first connecting rod groups are arranged in parallel; one end of the second connecting rod is coupled in the U-shaped cavity, and the other end of the second connecting rod is coupled with the first connecting rod group close to the lower part of the connecting support lug.

6. The centering tool for machining the bearing seat according to claim 5, wherein: the abutting block is of an arc-shaped structure.

7. The centering tool for machining the bearing seat according to claim 5, wherein: the first connecting rod group comprises two first connecting rods which are oppositely arranged, and the connecting lug and the connecting wing are connected between the two first connecting rods through rotating shafts.

8. The centering tool for machining the bearing seat according to claim 1, wherein the centering tool comprises: the base is of a cylindrical structure.

9. The centering tool for machining the bearing seat according to claim 1, wherein: the elastic self-resetting mechanism is a spring.

10. The centering tool for machining the bearing seat according to claim 1, wherein the centering tool comprises: the locking mechanism comprises a locking nut in threaded connection with the centering support and supporting rods in threaded connection with the outer wall of the locking nut, and the number of the supporting rods is at least three and the supporting rods are arranged at equal intervals.