CN113714834A

CN113714834A - Bearing seat boring clamp and assembling method

Info

Publication number: CN113714834A
Application number: CN202111187885.7A
Authority: CN
Inventors: 陈小敏; 宁梦涛; 吴子琅; 易筱彧; 丁康; 徐志洪
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2021-11-30
Anticipated expiration: 2041-10-12
Also published as: CN113714834B

Abstract

The invention relates to the technical field of machine tool fixtures, in particular to a bearing seat boring fixture and an assembling method, comprising a base, a positioning mechanism and a clamping mechanism respectively mounted on the base; the positioning mechanism comprises a bottom positioning reference piece, which is connected with the base connection, used for positioning the bottom surface of the bearing seat; side positioning reference piece, connected with the base, used for positioning the first side surface of the bearing seat; end face positioning reference piece, connected with the base, used for positioning the first end face of the bearing seat; the The clamping mechanism is installed on the base, and is respectively matched with the side positioning reference piece and the end face positioning reference piece to clamp the bearing seat. The invention has a simple structure and is easy to operate, can meet the processing requirements and precision requirements of the bearing seat, and effectively improves the processing efficiency.

Description

Bearing seat boring clamp and assembling method

Technical Field

The invention relates to the technical field of machine tool fixtures, in particular to a bearing seat boring fixture and an assembling method.

Background

In the process of boring the bearing seat, the bearing seat needs to be positioned and clamped by a clamp, so that the boring precision of the bearing seat is ensured. In the process of boring the bearing seat, the distances between the axis of the bored hole and the bottom surface and the side surface and the depth of the bored hole are ensured by positioning reference.

The patent with publication number CN213104611U discloses a boring processing clamp for a bearing seat, which comprises a boring die base and a positioning mechanism; a positioning mechanism comprising: the supporting plate is arranged on the boring die base, and a positioning hole is formed in the supporting plate; and the lower part of the positioning pin is matched and arranged in the positioning hole, and the upper part of the positioning pin is suitable for being in positioning connection with two screw holes on the bottom surface of the bearing seat. This patent adopts the locate mode of "one side two round pins", needs to process the locating hole of high accuracy in bearing frame and backup pad, also makes to cause the damage between round pin axle and the locating hole because of the error easily when changing the bearing frame, influences positioning accuracy, complex operation.

Disclosure of Invention

The invention aims to overcome the technical problems of influence on positioning accuracy and complex operation in the prior art, and provides a bearing seat boring clamp on one hand and an assembly method of the bearing seat boring clamp on the other hand.

On one hand, the boring clamp for the bearing seat comprises a base, and a positioning mechanism and a clamping mechanism which are respectively arranged on the base; the positioning mechanism includes: the bottom surface positioning reference part is connected with the base and used for positioning the bottom surface of the bearing seat; the side positioning reference piece is connected with the base and used for positioning the first side of the bearing seat; the end face positioning reference piece is connected with the base and used for positioning the first end face of the bearing seat; the clamping mechanism is arranged on the base and is matched with the side positioning reference part and the end surface positioning reference part respectively to clamp the bearing seat.

Furthermore, the clamping mechanism comprises a connecting rod, a wheel disc, a clamping screw and a pressing block; the connecting rod comprises a first rod body and a second rod body connected with the first rod body; the first rod body is vertical to the second rod body; the connecting rod is connected with the base through a first pin in a manner of rotating around the axis of the first pin; a threaded hole penetrating through the first rod body is formed in the first rod body; one end of the clamping screw is fixedly connected with the wheel disc, and the other end of the clamping screw is matched with the threaded hole and abuts against the second side face of the bearing seat after penetrating through the threaded hole; the pressing block is connected with the second rod body through a second pin in a manner of rotating around the axis of the second pin; the pressing block abuts against the second end face of the bearing seat.

Furthermore, a pin shaft hole for a second pin to pass through is formed in the middle of the pressing block; the two ends of the pressing block are respectively provided with arc-shaped bulges protruding towards the direction of the bearing seat.

Furthermore, the clamping screw comprises a connecting section connected with the rotary table, a threaded section matched with the threaded hole and a clamping part abutted against the second side face; the clamping part is smooth and hemispherical.

Furthermore, a channel is formed in the second rod body, and the pressing block can rotate around the axis of the second pin and is arranged in the channel.

Furthermore, the bearing seat boring clamp comprises two bottom positioning reference parts which are distributed at intervals; the bottom surface positioning reference part comprises a bottom surface positioning reference plate and a plurality of positioning convex strips positioned on the bottom surface positioning reference plate, and the positioning convex strips are abutted against the bottom surface of the bearing seat; the bottom positioning reference plate is provided with a counter bore for connecting the base; the positioning convex strip avoids the counter sink.

Further, the side positioning reference piece comprises a support nail seat and a first support nail; the support nail seat is fixedly connected with the base and is abutted against the first side face; the first support nail is fixedly connected with the support nail seat; the first support nail is arranged coaxially with the clamping screw.

Further, the end face positioning reference part comprises a first bracket and two second supporting nails; the first support is fixedly connected with the base, the two support nails are respectively fixedly connected with the first support, and the support nails are abutted to the first end face.

Further, the boring sleeve assembly comprises a second bracket and a boring sleeve; the second support is fixedly connected with the base and is positioned on one side, away from the bearing seat, of the end face positioning reference part; and the second support is provided with an assembling hole for assembling the boring sleeve.

On the other hand, the assembling method of the bearing seat boring clamp provided by the invention comprises the following steps:

prefabricating a first connecting hole, a second connecting hole, a third connecting hole, a fourth connecting hole and a fifth connecting hole on a base;

placing the pressing block in the channel of the second rod body, connecting the pressing block and the second pin by adopting a fit tolerance H9/H9, and connecting the second rod body and the second pin by adopting a fit tolerance P7/H6; the press block and the second pin are in clearance fit, and the second rod body and the second pin are in interference fit;

connecting the first pin and the connecting rod by adopting a fit tolerance H9/H9, so that the first pin and the connecting rod form clearance fit, and the connecting position is positioned at the intersection of the first rod body and the second rod body; then, the first pin and the first connecting hole are connected in a threaded fit manner, so that the lower bottom surface of the connecting rod is tightly attached to the base;

adopting a fit tolerance P7/h6 to connect the wheel disc and the clamping screw, so that interference fit is formed between the connecting wheel disc and the clamping screw; then the clamping screw is in threaded fit connection with the connecting rod;

connecting the boring sleeve and the second bracket by adopting a fit tolerance P7/h6 to form clearance fit between the boring sleeve and the second bracket; the second support is fixed on the base through the threaded fit of the screw and the second connecting hole;

connecting the first bracket and the second supporting nail by adopting a fit tolerance H7/r6 to enable the first bracket and the second supporting nail to form interference fit; the first support is fixed on the base through the threaded fit of the screw and the third connecting hole;

connecting the support nail seat and the first support nail by adopting a fit tolerance H7/r6 to ensure that the support nail seat and the first support nail form interference fit; then the support nail seat is fixed on the base through the threaded fit of the screw and the fourth connecting hole;

and the bottom positioning reference part is fixed on the base by utilizing the threaded fit of the screw passing through the countersunk hole and the fifth connecting hole.

The invention has the beneficial effects that:

1. according to the invention, the bottom surface, the first side surface and the first end surface of the bearing seat are respectively positioned by the bottom surface positioning reference piece, the side surface positioning reference piece and the end surface positioning reference piece, and the bearing seat is clamped by matching with the clamping mechanism, so that the positioning precision is prevented from being influenced by the error between the positioning hole and the pin shaft.

2. According to the clamping mechanism provided by the invention, the clamping screw is pressed against the second side surface of the bearing seat by screwing the clamping screw, and the clamping screw is continuously screwed after the clamping screw is pressed against the second side surface of the bearing seat, so that the connecting rod rotates around the first pin, the pressing block is pressed against the second end surface of the bearing seat, and the bearing seat is clamped. The clamping process is simple to operate, and the X-axis direction and the Y-axis direction of the bearing seat can be synchronously clamped by screwing the clamping screw.

3. According to the clamping mechanism provided by the invention, the pressing block is connected with the second connecting rod in a manner of rotating around the axis of the second pin through the second pin, so that the pressing block can be self-adaptively adjusted to be parallel to the second end surface in the clamping process, the clamping of the bearing seat is ensured, and the precision of the boring machining process is ensured.

Drawings

FIG. 1 is a schematic illustration of a trial workpiece of the present invention;

FIG. 2 is an isometric view of the present invention;

FIG. 3 is a schematic view of the assembly of the present invention with a workpiece;

FIG. 4 is a schematic view of a briquette according to the present invention;

FIG. 5 is a schematic view of a connecting rod of the present invention;

FIG. 6 is a schematic view of a clamping mechanism of the present invention;

FIG. 7 is a schematic view of a positioning rib of the present invention;

fig. 8 is a schematic view of a base in the present invention.

Reference numerals:

1-a base; 2-supporting the nail seat; 3-a first support nail; 4-a first scaffold; 5-a second support nail; 6-boring sleeve assembly; 7-a wheel disc; 8-a clamping screw; 9-a connecting rod; 10-positioning convex strips; 11-a first pin; 12-briquetting; 13-a second pin; 14-a bearing seat; 15-a first side; 16-a second side; 17-a first end face; 18-a second end face; 19-a first rod; 20-a second rod body; 21-a second scaffold; 22-boring sleeve.

Detailed Description

It should be apparent that the embodiments described below are some, but not all embodiments of the invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically indicated and limited.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The embodiment of the invention provides a bearing seat boring clamp which comprises a base 1, a positioning mechanism, a clamping mechanism and a boring sleeve assembly 6.

The base 1 plays a supporting role and is mainly used for supporting the positioning mechanism, the clamping mechanism and the boring sleeve assembly 6.

The positioning mechanism is mainly used for positioning the bearing seat 14 and comprises a bottom surface positioning reference piece, a side surface positioning reference piece and an end surface positioning reference piece;

the bottom positioning reference part comprises two bottom positioning reference parts which are distributed at intervals; the bottom surface positioning reference part comprises a bottom surface positioning reference plate and a plurality of positioning convex strips 10 positioned on the bottom surface positioning reference plate, and the positioning convex strips 10 are abutted against the bottom surface of the bearing seat 14; the bottom positioning reference plate is provided with a counter bore for connecting the base 1; the positioning ribs 10 avoid the counter bores.

The side positioning reference part comprises a support nail seat 2 and a first support nail 3; the support nail seat 2 is fixedly connected with the base 1 and is abutted against the first side surface 15; the first support nail 3 is fixedly connected with the support nail seat 2; the first support pin 3 is arranged coaxially with the clamping screw 8.

The end face positioning reference part comprises a first bracket 4 and two second supporting nails 5; first support 4 and base 1 fixed connection, two the support nail respectively with first support 4 fixed connection, and the support nail with first terminal surface 17 offsets.

In the fixing mechanism, the first support 4 and the second support 5 are in interference fit.

In the fixing mechanism, the support nail seat 2 and the first support 3 nail form interference fit.

The clamping mechanism is mainly used for fixing the bearing seat 14. Comprises a connecting rod 9, a wheel disc 7, a clamping screw 8 and a pressing block 12; the connecting rod 9 comprises a first rod body 19 and a second rod body 20 connected with the first rod body 19; the first rod body 19 is perpendicular to the second rod body 20; the connecting rod 9 is connected with the base 1 through a first pin 11 in a manner of rotating around the axis of the first pin 11; a threaded hole is formed in the first rod body 19 in a penetrating manner; one end of the clamping screw 8 is fixedly connected with the wheel disc 7, and the other end of the clamping screw is matched with the threaded hole and abuts against the second side surface 16 of the bearing seat 14 after penetrating through the threaded hole; the pressing block 12 is connected with the second rod body 20 through a second pin 13 in a manner of rotating around the axis of the second pin 13; the pressure piece 12 abuts against a second end face 18 of the bearing seat 14.

The clamping screw 8 comprises a connecting section connected with the rotary table 7, a threaded section matched with the threaded hole and a clamping part abutted against the second side surface 16; the clamping part is smooth and hemispherical.

In the clamping mechanism, the clamping part abutting against the second side surface 16 presses and contacts the second side surface 16 during clamping, and the pressing block 12 presses and contacts the second end surface 18, so that the clamping stability is improved.

In the clamping mechanism, the first pin 11 and the connecting rod 9 form clearance fit.

In the clamping mechanism, a press block 12 and a second pin 13 form clearance fit.

In the clamping mechanism, the second rod body 20 and the second pin 13 form interference fit.

In the clamping mechanism, the wheel disc 7 and the clamping screw 8 form interference fit.

The boring sleeve assembly 6 is mainly used for boring the bearing seat 14. The device comprises a second support 21 and a boring sleeve 22, wherein the second support 21 is fixedly connected with the base 1, a transversely arranged mounting hole is formed in the second support 21, and the boring sleeve 22 is mounted in the mounting hole.

In the boring sleeve assembly 6, a clearance fit is formed between the boring sleeve 22 and the second bracket 21.

With this structure, the freedom of movement in the Z direction of the bearing housing 14, and the freedom of rotation in the direction X, Y are restricted by the support plate; the second support nail 5 is matched with the first bracket 4 to limit the freedom degree of movement along the X direction and the freedom degree of rotation along the Z direction; the first support nail 3 is matched with the support nail seat 2 to limit the freedom degree of movement along the Y direction, and six-point complete positioning is formed; through the above-mentioned constitutional unit, can realize the location accuracy of bearing frame 14. And the pressing block 12, the connecting rod 9 and the wheel disc 7 form a clamping mechanism, so that the end surface of the bearing seat 14 is tightly attached to the positioning element supporting nail, and machining errors are avoided. And finally, the positioning and fixing requirements of the bearing seat 14 are finished. The invention has simple operation and convenient maintenance, and can meet the processing requirement and the precision requirement of the bearing seat 14.

The assembling method of the bearing seat boring clamp comprises the following steps:

prefabricating a first connecting hole, a second connecting hole, a third connecting hole, a fourth connecting hole and a fifth connecting hole on the base 1;

placing the press block 12 in the groove of the second rod body 20, connecting the press block 12 with the second pin 13 by adopting a fit tolerance H9/H9, and connecting the second rod body 20 with the second pin 13 by adopting a fit tolerance P7/H6; a clearance fit is formed between the pressing block 12 and the second pin 13, and an interference fit is formed between the second rod body 20 and the second pin 13;

connecting the first pin 11 and the connecting rod 9 by adopting a fit tolerance H9/H9, so that the first pin 11 and the connecting rod 9 form clearance fit, and the connection position is positioned at the intersection of the first rod body 19 and the second rod body 20; then, the first pin 11 and the first connecting hole are connected in a threaded fit manner, so that the lower bottom surface of the connecting rod 9 is tightly attached to the base 1;

adopting a fit tolerance P7/h6 to connect the wheel disc 7 and the clamping screw 8, so that the connecting wheel disc 7 and the clamping screw 8 form interference fit; then the clamping screw 8 is in threaded fit connection with the connecting rod 9;

connecting the boring sleeve 22 and the second support 21 by adopting a fit tolerance P7/h6, so that a clearance fit is formed between the boring sleeve 22 and the second support 21; the second bracket 21 is fixed on the base 1 through the threaded fit of the screw and the second connecting hole;

connecting the first support 4 and the second support nail 5 by adopting a fit tolerance H7/r6 to enable the first support 4 and the second support nail 5 to form interference fit; the first support 4 is fixed on the base 1 through the threaded fit of the screw and the third connecting hole;

connecting the support nail seat 2 and the first support nail 3 by adopting a fit tolerance H7/r6 to ensure that the support nail seat 2 and the first support nail 3 form interference fit; then the support nail seat 2 is fixed on the base 1 through the threaded fit of the screw and the fourth connecting hole;

and the bottom positioning reference part is fixed on the base 1 by utilizing the threaded fit of the screw and the fifth connecting hole after the screw passes through the counter bore.

The operation method of the clamp in the above embodiment is as follows: the first support nail 3 is fixedly connected with the support nail seat 2, the two second support nails 5 are respectively fixedly connected with the first support 4, then the bearing seat 14 is placed on the upper end face of the bottom surface positioning reference part, the bottom of the bearing seat 14 is abutted against the positioning convex strip 10, the first support nail 3 is abutted against the bearing seat 14 and the first side face 15, the two second support nails 5 are abutted against the bearing seat 14 and the first end face 17, the clamping part abutted against the second side face 16 is clamped with the second side face 16 by screwing the wheel disc 7, and the pressing block 12 is clamped with the second end face 18, so that the bearing seat 14 can be processed. And after the machining is finished, loosening the wheel disc 7, taking out the bearing seat 14, putting the next bearing seat 14 to be machined into the bearing seat, and fixing according to the process.

The structure of the bearing seat 14 is not complicated, but for the process of boring, the universal clamp is difficult to meet the processing requirements of quick positioning, clamping and the like, so a special clamp is designed according to the actual situation. The fixture can realize quick positioning and clamping of the bearing seat 14 in the machining process, obviously reduces the auxiliary machining time, improves the machining efficiency and reduces the production cost; the requirement on the technology of workers is reduced, the clamp is convenient to use, easy to machine and manufacture, and meanwhile, the product quality can be well guaranteed.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A bearing seat boring fixture, comprising a base (1), and a positioning mechanism and a clamping mechanism respectively installed on the base (1); it is characterized in that:

The positioning mechanism includes:

The bottom surface positioning reference piece is connected with the base (1) and used for positioning the bottom surface of the bearing seat (14);

a lateral positioning reference piece, connected with the base (1), for positioning the first lateral surface (15) of the bearing seat (14);

an end face positioning reference piece, connected with the base (1), and used for positioning the first end face (17) of the bearing seat (14);

The clamping mechanism is mounted on the base (1), and is respectively matched with the lateral positioning reference piece and the end surface positioning reference piece to clamp the bearing seat (14).

2. A bearing seat boring fixture according to claim 1, characterized in that: the clamping mechanism comprises a connecting rod (9), a wheel disc (7), a clamping screw (8) and a pressing block (12) ); the connecting rod (9) includes a first rod body (19) and a second rod body (20) connected with the first rod body (19); the first rod body (19) is perpendicular to the second rod body (20) ; the connecting rod (9) is connected with the base (1) through the first pin (11) in a rotatable manner around the axis of the first pin (11); the first rod body (19) is provided with a through threaded hole; One end of the clamping screw (8) is fixedly connected with the wheel disc (7), and the other end is matched with the threaded hole and abuts against the second side surface (16) of the bearing seat (14) after passing through the threaded hole; 12) The second pin (13) and the second rod body (20) are rotatably connected around the axis of the second pin (13); the pressing block (12) is in abutment with the second end surface (18) of the bearing seat (14) .

3. A bearing seat boring fixture according to claim 2, characterized in that: the middle of the pressing block (12) is provided with a pin shaft hole for accommodating the passage of the second pin (13); Both ends of (12) are respectively provided with arc-shaped protrusions that protrude toward the direction where the bearing seat (14) is located.

4. A bearing seat boring fixture according to claim 2, characterized in that: the clamping screw (8) comprises a connecting section connected with the turntable (7), a threaded section matched with the threaded hole, and a connecting section connected with the turntable (7) The clamping part with the two side surfaces (16) abutting against each other; the clamping part is a smooth hemispherical shape.

5. A bearing seat boring fixture according to claim 2, characterized in that: the second rod body (20) is provided with a groove, and the pressing block (12) can be wound around the second pin (13) The axis is rotatably placed in the channel.

6 . The bearing seat boring fixture according to claim 1 , wherein: it comprises two bottom positioning reference pieces distributed at intervals; the bottom positioning reference piece comprises a bottom positioning reference plate, and a plurality of bottom positioning reference pieces located on the bottom surface. 7 . A positioning protruding strip (10) on the reference plate, the positioning protruding strip (10) is in contact with the bottom surface of the bearing seat (14); the bottom positioning reference plate is provided with a countersunk hole for connecting the base (1); The positioning protruding strip (10) avoids the countersunk hole.

7. A bearing boring fixture according to claim 1, characterized in that: the lateral positioning reference member comprises a support nail seat (2) and a first support nail (3); the support nail seat (2) It is fixedly connected with the base (1) and abuts against the first side surface (15); the first support nail (3) is fixedly connected with the support nail seat (2); the first support nail (3) is connected with the clamping screw (8) Coaxial arrangement.

8. A bearing boring fixture according to claim 1, characterized in that: the end face positioning reference member comprises a first bracket (4) and two second support nails (5); the first bracket ( 4) It is fixedly connected to the base (1), the two support pins are respectively fixedly connected to the first bracket (4), and the support pins are abutted against the first end surface (17).

9. A bearing boring fixture according to any one of claims 1 to 8, characterized in that it further comprises a boring sleeve assembly (6), the boring sleeve assembly (6) comprising a second bracket (21) and A boring sleeve (22); the second bracket (21) is fixedly connected with the base (1), and is located on the side of the end face positioning reference piece away from the bearing seat (14); the second bracket (21) is provided with a Fit the mounting hole of the boring sleeve (22).

10. A method for assembling the bearing housing boring fixture according to any one of claims 1 to 9, characterized in that it comprises the following steps:

Prefabricating a first connection hole, a second connection hole, a third connection hole, a fourth connection hole and a fifth connection hole on the base (1);

Place the pressure block (12) in the groove of the second rod body (20), then use the matching tolerance H9/h9 to connect the pressure block (12) and the second pin (13), and use the matching tolerance P7/h6 to connect the second rod body ( 20) and the second pin (13); form a clearance fit between the pressing block (12) and the second pin (13), and form an interference fit between the second rod body (20) and the second pin (13);

The first pin (11) and the connecting rod (9) are connected by the fit tolerance H9/h9, so that the first pin (11) and the connecting rod (9) form a clearance fit, and the connection is located between the first rod body (19) and the second connecting rod (9). the intersection of the rod bodies (20); the first pin (11) and the first connecting hole are then connected by threaded fitting, so that the lower bottom surface of the connecting rod (9) is close to the base (1);

Use the fitting tolerance P7/h6 to connect the wheel disc (7) and the clamping screw (8) to form an interference fit between the connecting wheel disc (7) and the clamping screw (8); then connect the clamping screw (8) to the clamping screw (8). Connecting rod thread fit connection;

Use the matching tolerance P7/h6 to connect the boring sleeve (22) and the second bracket (21), so that a clearance fit is formed between the boring sleeve (22) and the second bracket (21); The second bracket (21) is fixed on the base (1);

The first bracket (4) and the second support nail (5) are connected with the matching tolerance H7/r6, so that the first bracket (4) and the second support nail (5) form an interference fit; The first bracket (4) is fixed on the base (1) by screw fit;

The supporting nail base (2) and the first supporting nail (3) are connected with the matching tolerance H7/r6, so that the supporting nail base (2) and the first supporting nail (3) form an interference fit; The support nail seat (2) is fixed on the base (1) by screw fit;

The bottom surface positioning reference member is fixed on the base (1) by using the screw to pass through the countersunk hole and then threaded with the fifth connecting hole.