CN219169646U

CN219169646U - Gear shaft class part hole clamping positioning mechanism that floats

Info

Publication number: CN219169646U
Application number: CN202223410271.3U
Authority: CN
Inventors: 李钢剑; 杨帆; 陈永东
Original assignee: Xian Fast Auto Drive Co Ltd
Current assignee: Xian Fast Auto Drive Co Ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-06-13
Anticipated expiration: 2032-12-19

Abstract

The utility model discloses a floating clamping and positioning mechanism for an inner hole of a gear shaft part, which comprises a C-shaped clamp body; the center of the upper mounting part of the clamp body is provided with a machine tool spindle, the machine tool spindle is sequentially connected with a flange, a first mounting seat and a first center, the other side of the flange is connected with a hydraulic cylinder, the center of the first mounting seat is provided with a through hole, a piston rod of the hydraulic cylinder is connected with one end of a switching rod, an expansion sleeve is arranged in an inner hole of the first center, and a pull rod penetrates through the expansion sleeve and is connected with the other end of the switching rod; the lower installation department of anchor clamps body is provided with the second mount pad, and the step through-hole has been seted up at the second mount pad center, and the bottom contact of second top contacts with the spring, sets up in the step through-hole of second mount pad. The hydraulic cylinder moves upwards to drive the transfer rod, and pulls the pull rod to move upwards, so that the outer conical surface of the pull rod is matched with the inner conical surface of the expansion sleeve, the expansion sleeve is expanded, the inner hole of the workpiece is expanded tightly, the deformation of the machine tool fixture when the workpiece is clamped to the outer circle is avoided, and the machining precision of the part is effectively improved.

Description

Gear shaft class part hole clamping positioning mechanism that floats

Technical Field

The utility model belongs to the technical field of machining, and relates to a floating clamping and positioning mechanism for an inner hole of a gear shaft part.

Background

At present, the thin-wall part of the gear shaft part is processed in the automobile industry, the clamping excircle is often adopted, the clamping positioning effect is in conflict with the positioning of the upper and lower center holes of the part, the positioning problem can occur, and the problems of low yield and low processing precision of the part are caused. The structure of part of the shaft gear part is a large central hole and a thin-wall part, so that the part is easy to deform after clamping the outer circle in the processing process, and the clamping outer circle also has a positioning effect, conflicts with the upper central hole and the lower central hole as references, and has the problem of over positioning, so that the processing precision of the part is low.

Disclosure of Invention

The utility model aims to solve the problem that in the prior art, when a machine tool fixture clamps the outer circle of a gear shaft thin-wall part, the outer circle is easy to deform, so that the machining precision is low, and provides a floating clamping and positioning mechanism for the inner hole of the gear shaft part.

In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:

the utility model provides a gear shaft class part hole floating clamp positioning mechanism, includes the anchor clamps body, and the anchor clamps body is C structure, includes upper mounting portion, branch and lower installation portion;

the center of the upper mounting part is provided with a machine tool main shaft, the machine tool main shaft is sequentially connected with a flange, a first mounting seat and a first center, the other side of the flange is connected with a hydraulic cylinder, the center of the first mounting seat is provided with a through hole, a piston rod of the hydraulic cylinder is connected with one end of a switching rod, the center of the first center is provided with two-side step holes, an expansion sleeve is arranged in an inner hole of the first center, a pull rod penetrates through the expansion sleeve and is connected with the other end of the switching rod, and the outer conical surface of the pull rod is matched with the inner conical surface of the expansion sleeve;

the lower mounting part is correspondingly provided with a second mounting seat, the center of the second mounting seat is provided with a step through hole, the second center is mounted in the second mounting seat and matched with the step through hole of the second mounting seat, and the spring is arranged in the step through hole of the second mounting seat and is contacted with the bottom of the second center.

The utility model further improves that:

an Oldham coupling is connected between a piston rod of the hydraulic oil cylinder and one end of the transfer rod.

One end of the cross coupling is connected with the transfer rod through threads, and the other end of the cross coupling is connected with a piston rod of the hydraulic oil cylinder through threads.

The machine tool spindle is connected with the flange, the flange is connected with the hydraulic cylinder, the flange is connected with the first mounting seat and the first mounting seat is connected with the first center through bolts.

The pull rod is connected with the other end of the switching rod through threads.

And a switching disc and a workbench are further arranged between the lower mounting part and the second mounting seat.

The second mounting seat is connected with the adapter plate, the adapter plate is connected with the workbench and the lower mounting part through bolts.

And a plug is installed at the bottom of the through hole of the second installation seat, and the plug is connected with the second installation seat through threads.

Compared with the prior art, the utility model has the following beneficial effects:

according to the floating clamping and positioning mechanism for the inner holes of the gear shafts, the hydraulic oil cylinder moves upwards to drive the switching rod, and then the pulling rod is pulled to move upwards, so that the outer conical surface of the pulling rod is matched with the inner conical surface of the expansion sleeve, the expansion sleeve is expanded, the inner holes of the thin-wall parts of the gear shafts are further expanded, the deformation of the thin-wall parts of the gear shafts caused by the fact that the machine tool clamp in the prior art clamps the outer circles of the thin-wall parts of the gear shafts can be avoided, and the machining precision of the parts is effectively improved.

Further, through setting up the connection Oldham coupling between hydraulic cylinder's piston rod and transfer pole, thereby the effect that thereby realizes the tight work piece hole that rises by Oldham coupling drive pull rod and expansion sleeve, because the Oldham coupling has the effect of multi-direction free activity regulation, first top and the contact portion of cover that rises are provided with the conical surface of certain length, consequently rise cover and pull rod all have the effect of floating, when the tight work piece hole that rises, only can play the centre gripping effect, can not influence the machining precision of work piece.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a clamping and positioning mechanism of the present utility model;

FIG. 2 is a cross-sectional view of a clamping and positioning mechanism of the present utility model clamping a workpiece;

FIG. 3 is a cross-sectional view of the clamping and positioning mechanism of the present utility model;

fig. 4 is a schematic view of an oldham coupling according to the present utility model.

Wherein: the machine tool comprises a machine tool main shaft, a 2-flange, a 3-first mounting seat, a 4-first center, a 5-pull rod, a 6-expansion sleeve, a 7-workpiece, an 8-second center, a 9-second mounting seat, a 10-spring, an 11-plug, a 12-adapter plate, a 13-workbench, a 14-clamp body, a 15-adapter rod, a 16-cross coupling and a 17-hydraulic cylinder.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The utility model is described in further detail below with reference to the attached drawing figures:

referring to fig. 1-3, a structural schematic diagram of an inner hole floating clamping and positioning mechanism of a gear shaft part in the utility model comprises a machine tool main shaft 1, a flange 2, a first mounting seat 3, a first center 4, a pull rod 5, an expansion sleeve 6, a second center 8, a second mounting seat 9, a spring 10, a plug 11, a switching disc 12, a workbench 13, a clamp body 14, a switching rod 15, an oldham coupling 16 and a hydraulic cylinder 17; the flange 2 is connected to the machine tool spindle 1 through bolts, the first mounting seat 3 is connected with the flange 2 through bolts, the first center 4 is mounted on the first mounting seat 3 through bolts, the outer circle of the expansion sleeve 6 is sleeved in the inner hole of the first center 4, the expansion sleeve 6 is in clearance fit with the first center 4, the pull rod 5 penetrates through the inner hole of the expansion sleeve 6, one end of the pull rod 5, provided with external threads, is connected with the adapter rod 15 through threads, the external threads of the adapter rod 15 are connected with the inner threaded holes of the cross coupling 16, and the piston rod of the hydraulic cylinder 17 is connected with the other end of the cross coupling 16 through threads. The second center 8 is arranged in a step through hole of the second mounting seat 9, the spring 10 is simultaneously arranged in the step through hole of the second mounting seat 9 after the second center 8 is arranged, the plug 11 is in threaded connection with the second mounting seat 9, and the plug 11 is connected with the second mounting seat 9 after the spring 10 and the second center 8 are arranged. The second mounting seat 9 is in bolt connection with the switching disc 12, the switching disc 12 is in bolt connection with the workbench 13, and the workbench 13 is in bolt connection with the clamp body 14.

The specific installation process of the utility model is as follows:

in the lower mounting part, a second center 8 and a spring 10 are firstly sequentially mounted in an inner hole of a second mounting seat 9, a plug 11 is connected with the second mounting seat 9 through threads, the lower mounting seat 9 is connected to a switching disc 12 through a bolt, and finally the switching disc 12 is connected to a workbench 13 through a bolt;

in the upper mounting part, firstly, a hydraulic oil cylinder 17 is mounted on one side of a flange 2 through bolts, then a first mounting seat 3 is mounted on the other side of the flange 2 through bolt connection, a piston rod of the hydraulic oil cylinder 17 penetrates through the flange 2 to be sequentially connected with an Oldham coupling 16 and an adapter rod 15, then the first mounting seat 3 is mounted with a first center 4 through bolt connection, a tension sleeve 6 is sleeved in an inner hole of the first center 4, a pull rod 5 penetrates through the tension sleeve 6 and then is connected with the adapter rod 15 through threaded connection, and finally the flange 2 is mounted and connected with a machine tool spindle 1 through bolts.

The specific working process of the utility model is as follows:

firstly, a workpiece 7 is placed on a second center 8, a machine tool main shaft 1 moves downwards, so that the first center 4 is propped against an inner hole at the upper end of the workpiece 7, the second center 8 moves downwards under the stress, a spring 10 is compressed, the first center 4 and the second center 8 realize the positioning of the workpiece, the deflection of the workpiece caused by the contact of an expanding sleeve and the workpiece is avoided, and the high-precision machining is realized by means of the positioning of upper and lower center holes of the workpiece.

The piston rod of the hydraulic cylinder 17 drives the cross coupling 16 when moving upwards, and then drives the switching rod 15, so that the switching rod 15 pulls the pull rod 5 to move upwards, the outer conical surface of the pull rod 5 is matched with the inner conical surface of the expansion sleeve 6, the expansion sleeve 6 is opened, the inner hole of the workpiece 7 is further expanded, and the floating of the expansion sleeve 6 in the clamping process is realized due to the multidirectional free adjustment effect of the cross coupling 16.

According to the gear shaft inner hole floating clamping and positioning mechanism, the hydraulic oil cylinder moves upwards to drive the switching rod, and then the pulling rod is pulled to move upwards, so that the outer conical surface of the pulling rod is matched with the inner conical surface of the expansion sleeve, the expansion sleeve is opened, the inner hole of the gear shaft thin-wall part is expanded, the deformation of the gear shaft thin-wall part caused by the fact that the machine tool clamp in the prior art clamps the outer circle of the gear shaft thin-wall part can be avoided, and the machining precision of the part is effectively improved. And through setting up the connection Oldham coupling between hydraulic cylinder's piston rod and transfer pole, thereby the effect that thereby realizes the tight work piece hole that rises by Oldham coupling drive pull rod and expansion sleeve, because the Oldham coupling has the effect of multi-direction free activity regulation, the contact part of first top and expansion sleeve is provided with the conical surface of certain length, consequently rises cover and pull rod and all have the effect of floating, when the tight work piece hole that rises, only can play the centre gripping effect, can not influence the machining precision of work piece.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The inner hole floating clamping and positioning mechanism for the gear shaft part is characterized by comprising a clamp body (14), wherein the clamp body (14) is of a C-shaped structure and comprises an upper mounting part, a supporting rod and a lower mounting part;

the center of the upper mounting part is provided with a machine tool spindle (1), the machine tool spindle (1) is sequentially connected with a flange (2), a first mounting seat (3) and a first center (4), the other side of the flange (2) is connected with a hydraulic cylinder (17), the center of the first mounting seat (3) is provided with a through hole, a piston rod of the hydraulic cylinder (17) is connected with one end of a transfer rod (15), the center of the first center (4) is provided with a double-side step hole, an expansion sleeve (6) is arranged in an inner hole of the first center (4), a pull rod (5) penetrates through the expansion sleeve (6) to be connected with the other end of the transfer rod (15), and the outer conical surface of the pull rod (5) is matched with the inner conical surface of the expansion sleeve (6);

the lower mounting part is correspondingly provided with a second mounting seat (9), a step through hole is formed in the center of the second mounting seat (9), a second center (8) is mounted in the second mounting seat (9) and matched with the step through hole of the second mounting seat (9), and a spring (10) is arranged in the step through hole of the second mounting seat (9) and is in contact with the bottom of the second center (8).

2. The floating clamping and positioning mechanism for the inner hole of the gear shaft part according to claim 1, wherein an Oldham coupling (16) is connected between a piston rod of the hydraulic oil cylinder (17) and one end of the adapter rod (15).

3. The floating clamping and positioning mechanism for the inner hole of the gear shaft part according to claim 2, wherein one end of the cross coupling (16) is connected with the adapter rod (15) through threads, and the other end of the cross coupling is connected with a piston rod of the hydraulic oil cylinder (17) through threads.

4. The floating clamping and positioning mechanism for the inner hole of the gear shaft part according to claim 1 is characterized in that bolts are used for connection between a machine tool main shaft (1) and a flange (2), between the flange (2) and a hydraulic cylinder (17), between the flange (2) and a first mounting seat (3) and between the first mounting seat and a first center (4).

5. The floating clamping and positioning mechanism for the inner hole of the gear shaft part according to claim 1, wherein the pull rod (5) is connected with the other end of the switching rod (15) through threads.

6. A floating clamping and positioning mechanism for an inner hole of a gear shaft type part according to claim 1, wherein a switching disc (12) and a workbench (13) are further arranged between the lower mounting part and the second mounting seat (9).

7. The floating clamping and positioning mechanism for the inner hole of the gear shaft part according to claim 6, wherein the second mounting seat (9) is connected with the switching disc (12), the switching disc (12) is connected with the workbench (13) and the workbench (13) is connected with the lower mounting part through bolts.

8. The floating clamping and positioning mechanism for the inner hole of the gear shaft part according to claim 1, wherein a plug (11) is installed at the bottom of the through hole of the second installation seat (9), and the plug (11) is connected with the second installation seat (9) through threads.