CN219787418U

CN219787418U - Electric spindle inner hole clamping jig

Info

Publication number: CN219787418U
Application number: CN202321341680.4U
Authority: CN
Inventors: 徐富有; 季涛; 李瑜; 邓舟; 宋椅平; 谭星林
Original assignee: Huizhou Jingyang Technology Co ltd
Current assignee: Huizhou Jingyang Technology Co ltd
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-10-03
Anticipated expiration: 2033-05-29

Abstract

The utility model provides an electric spindle inner hole clamping jig, which comprises: a base, a movable clamping member, and a driving member; the base is provided with a containing cavity, and the movable clamping part is arranged in the containing cavity in a sliding way. Wherein, the movable clamping member includes: the first swing arm, the second swing arm, the elastic rubber ring and the base assembly are arranged in the accommodating cavity in a sliding mode, the first swing arm and the second swing arm are both rotationally arranged on the base assembly, the first swing arm and the second swing arm are both provided with clamping probe parts, and the elastic rubber ring is sleeved on the clamping probe parts. The driving part comprises a telescopic ejector rod and a force application cylinder, the force application cylinder pushes the telescopic ejector rod, the telescopic ejector rod penetrates through the base and the base assembly, the base is provided with a reference panel, and the clamping probe part penetrates through the reference panel. The clamping jig for the inner hole of the electric spindle can stably clamp and fix the inner hole of the electric spindle and protect the electric spindle from being damaged.

Description

Electric spindle inner hole clamping jig

Technical Field

The utility model relates to the technical field of motorized spindle clamping, in particular to an motorized spindle inner hole clamping jig.

Background

An electric spindle is a novel technology for integrating a machine tool spindle with a spindle motor in the field of numerical control machine tools. The electric spindle has the advantages of compact structure, light weight, small inertia, low noise, quick response and the like, has high rotating speed and high power, simplifies the design of a machine tool, is easy to realize spindle positioning, and is an ideal structure in a high-speed spindle unit.

In the machining process of the electric spindle, the electric spindle needs to be fixed, and particularly in some scenes, the electric spindle needs to be fixed through an inner hole of the electric spindle. Traditional hole centre gripping tool adopts screw thread steel claw or card to hold structures such as nail, supports to hold the hole of electricity main shaft, and then realizes fixing. Although this way is simple and convenient, but also easily scratch the inner wall of the motorized spindle.

Therefore, how to design an electric spindle inner hole clamping fixture, so that the electric spindle inner hole clamping fixture can stably clamp and fix an electric spindle inner hole, meanwhile, the electric spindle is protected from being damaged, the yield is improved, and the electric spindle inner hole clamping fixture is a technical problem which needs to be solved by a person skilled in the art.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides an electric spindle inner hole clamping jig which can stably clamp and fix an inner hole of an electric spindle, and meanwhile, the electric spindle is protected from being damaged, and the yield is improved.

The aim of the utility model is realized by the following technical scheme:

an electric spindle inner hole clamping fixture, it comprises the following steps: a base, a movable clamping member, and a driving member; the base is provided with an accommodating cavity, the movable clamping part is arranged in the accommodating cavity in a sliding manner, and the driving part is used for driving the movable clamping part;

the movable clamping member includes: the device comprises a first deflection arm, a second deflection arm, an elastic rubber ring and a base assembly, wherein the base assembly is arranged in the accommodating cavity in a sliding manner, the first deflection arm and the second deflection arm are both rotationally arranged on the base assembly, clamping probe parts are arranged on the first deflection arm and the second deflection arm, and the elastic rubber ring is sleeved on the clamping probe parts;

the driving part comprises a telescopic ejector rod and a force application cylinder, the force application cylinder pushes the telescopic ejector rod, the telescopic ejector rod penetrates through the base and the base assembly, and the telescopic ejector rod drives the first swing arm and the second swing arm in a matched mode;

the base is provided with a reference panel, and the clamping probe part penetrates through the reference panel.

In one embodiment, the base assembly comprises: the device comprises an upper supporting plate, a lower supporting plate, supporting bolts and limiting bolts;

the upper support plate is connected with the lower support plate through the support bolt, the first deviation arm and the second deviation arm are arranged between the upper support plate and the lower support plate, the first deviation arm and the second deviation arm are all rotationally arranged on the support bolt, the limit bolt is arranged on the upper support plate, the waist-shaped hole is formed in the base, and the limit bolt penetrates through the waist-shaped hole.

In one embodiment, the telescopic ejector rod is arranged between the upper support plate and the lower support plate, an accommodating groove is formed in the telescopic ejector rod, a telescopic elastic piece is arranged in the accommodating groove, the limiting bolt extends into the accommodating groove, and two ends of the telescopic elastic piece are respectively propped against the limiting bolt and the groove wall of the accommodating groove.

In one embodiment, the lower support plate is provided with a sliding block, a sliding rail matched with the sliding block is arranged in the accommodating cavity of the base, and the base assembly is arranged on the sliding rail in a sliding manner through the sliding block.

In one embodiment, the first swing arm and the second swing arm are respectively provided with a hinge part, the hinge parts are rotatably arranged on the supporting bolts, and bearings are arranged between the hinge parts and the supporting bolts.

In one embodiment, the end part of the telescopic ejector rod is provided with a force application inclined plane, the clamping probe parts of the first swing arm and the second swing arm are respectively provided with a guide inclined plane, and the force application inclined plane and the guide inclined plane are mutually in abutting fit.

In one embodiment, the clamping probe part is provided with an annular positioning groove, and the elastic rubber ring is clamped in the annular positioning groove; the diameter of the outer ring of the elastic rubber ring is larger than that of the clamping probe part.

In one embodiment, the cross section of the elastic rubber ring is of a T-shaped structure, the cross section of the elastic rubber ring comprises a positioning part and a contact part, and the positioning part is sunk into the annular positioning groove.

In one embodiment, the elastic rubber ring is of a high-strength rubber structure.

In one embodiment, the end of the clamping probe portion is provided with a rounded chamfer.

In conclusion, the clamping jig for the inner hole of the electric spindle can stably clamp and fix the inner hole of the electric spindle, the electric spindle is protected from being damaged, and the yield is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described, it is to be understood that the following drawings illustrate only certain embodiments of the utility model, and thus should not be taken as limiting the scope, other related drawings may also be obtained from these drawings without inventive effort to those of ordinary skill in the art.

FIG. 1 is a schematic diagram of the clamping fixture for an inner hole of an electric spindle;

FIG. 2 is a schematic plan view of the clamping fixture for the inner bore of the motorized spindle shown in FIG. 1;

FIG. 3 is a schematic view of the mating relationship between the base and the movable clamping member shown in FIG. 1;

FIG. 4 is an exploded view of the clamping fixture for the inner bore of the motorized spindle shown in FIG. 1;

FIG. 5 is a schematic view of the movable clamp part shown in FIG. 4;

FIG. 6 is an exploded view of the movable clamp part shown in FIG. 5;

FIG. 7 is a schematic view of the mating relationship of the telescoping ram and the movable clamping member when not clamped;

FIG. 8 is a schematic diagram of the mating relationship of the telescoping ram and the movable clamping member during clamping;

FIG. 9 is a schematic view of a movable clamp member in another embodiment;

fig. 10 is a schematic structural view of an elastic rubber ring in another embodiment.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The utility model provides an electric spindle inner hole clamping jig 10, which aims to clamp and fix an electric spindle 20 inner hole under the condition that the inner wall of the electric spindle 20 is not damaged, so as to protect the electric spindle 20 from being damaged. As shown in fig. 1 and 2, the motorized spindle inner hole clamping fixture 10 includes: base 100, movable clamp member 200, and drive member 300. The base 100 is provided with a receiving cavity 110, the movable clamping member 200 is slidably disposed in the receiving cavity 110, and the driving member 300 is used for driving the movable clamping member 200.

As shown in fig. 5 and 6, the movable clamp member 200 includes: the first swing arm 210, the second swing arm 220, the elastic rubber ring 230 and the base assembly 240, the base assembly 240 is slidably disposed in the accommodating cavity 110, the first swing arm 210 and the second swing arm 220 are both rotatably disposed on the base assembly 240, and the first swing arm 210 and the second swing arm 220 are both provided with a clamping probe portion 211, and the elastic rubber ring 230 is sleeved on the clamping probe portion 211.

As shown in fig. 4, the driving part 300 includes a telescopic ram 310 and a force application cylinder 320, the force application cylinder 320 pushing the telescopic ram 310, the telescopic ejector rod 310 penetrates through the base 100 and the base assembly 240, and the telescopic ejector rod 310 drives the first swing arm 210 and the second swing arm 220 in a matched mode. The base 100 is provided with a reference panel 120 (as shown in fig. 3 and 4), and the clamping probe portion 211 penetrates the reference panel 120.

When in use, the clamping probe portion 211 of the movable clamping component 200 protrudes out of the reference panel 120, the first swing arm 210 and the second swing arm 220 are close to each other, the electric spindle 20 is sleeved on the outer side of the clamping probe portion 211 by a worker, and the force application cylinder 320 pushes the telescopic ejector rod 310 to move forward, so that the first swing arm 210 and the second swing arm 220 are spread. The first and second spread swing arms 210 and 220 are close to the inner wall of the electric spindle 20, and the elastic rubber ring 230 on the clamping probe 211 is abutted against the inner wall of the electric spindle 20, so that the inner hole of the electric spindle 20 is clamped by virtue of friction between the elastic rubber ring 230 and the inner wall.

In this embodiment, as shown in fig. 6, the base assembly 240 includes: an upper support plate 241, a lower support plate 242, a support bolt 243, and a limit bolt 244. The upper support plate 241 is connected with the lower support plate 242 through a support bolt 243, the first swing arm 210 and the second swing arm 220 are arranged between the upper support plate 241 and the lower support plate 242, the first swing arm 210 and the second swing arm 220 are both rotatably arranged on the support bolt 243, the limit bolt 244 is arranged on the upper support plate 241, and the base 100 is provided with a waist-shaped hole 101 (as shown in fig. 4), and the limit bolt 244 is arranged through the waist-shaped hole 101. The stop bolt 244 mates with the waist-shaped hole 101, limiting the range of motion of the base assembly 240 within the receiving cavity 110.

Preferably, the first swing arm 210 and the second swing arm 220 are both provided with a hinge portion 212 (as shown in fig. 6), the hinge portion 212 is rotatably disposed on a supporting bolt 243, and a bearing (not shown) is disposed between the hinge portion 212 and the supporting bolt 243. The first swing arm 210 or the second swing arm 220 is deflected by using the supporting bolt 243 as a rotation axis, and the bearing can prevent the first swing arm 210 or the second swing arm 220 from being jammed during deflection.

In this embodiment, the end of the telescopic ram 310 is provided with a force application inclined surface 311 (as shown in fig. 4), and the clamping probe portions 211 of the first swing arm 210 and the second swing arm 220 are provided with guide inclined surfaces 213 (as shown in fig. 6), and the force application inclined surface 311 and the guide inclined surfaces 213 are in abutting engagement with each other.

Next, with reference to the above structure, a specific working principle of the motorized spindle inner hole clamping fixture 10 of the present utility model will be described:

in the initial state, the clamping probe portion 211 partially protrudes out of the reference panel 120, and the first swing arm 210 and the second swing arm 220 are close to each other, and the telescopic ejector rod 310 is in a contracted state, as shown in fig. 7;

when the electric spindle 20 needs to be clamped, a worker first sleeves the electric spindle 20 outside the clamping probe 211, and the end face of the electric spindle 20 abuts against the reference panel 120. The force application cylinder 320 pushes the telescopic ejector rod 310 to move forward, in this process, the telescopic ejector rod 310 will push the movable clamping component 200 to slide preferentially, specifically, the base component 240 slides close to the reference panel 120, the first swing arm 210 and the second swing arm 220 slide along with the telescopic ejector rod, the clamping probe part 211 further protrudes out of the reference panel 120 and goes deep into the motorized spindle 20 until the lower support plate 242 abuts against the reference panel 120, and the base component 240 cannot slide continuously; then, as the telescopic ejector rod 310 continues to advance, the telescopic ejector rod 310 is extruded between the first swing arm 210 and the second swing arm 220, and the force application inclined surface 311 is matched with the guide inclined surface 213 in an extrusion manner, so that the first swing arm 210 and the second swing arm 220 deflect;

after deflection, the distance between the first deflection arm 210 and the second deflection arm 220 is increased (the clamping probe portion 211 is expanded), the first deflection arm 210 and the second deflection arm 220 are close to the inner wall of the electric spindle 20, the elastic rubber ring 230 on the clamping probe portion 211 is expanded, and the outer ring of the elastic rubber ring 230 and the inner wall of the electric spindle 20 are mutually extruded. In this way, the elastic rubber ring 230 and the electric spindle 20 have friction force, the magnitude of the friction force is in direct proportion to the pressure holding force of the clamping probe part 211 on the inner wall of the electric spindle 20, and the electric spindle 20 and the clamping probe part 211 are difficult to separate due to the existence of the friction force, so that the clamping and fixing of the inner hole of the electric spindle 20 are realized, as shown in fig. 8;

when the disassembly is needed, the force application cylinder 320 pulls the telescopic ejector rod 310 to move in the opposite direction, the telescopic ejector rod 310 is retracted, the first swing arm 210 and the second swing arm 220 are not expanded by the telescopic ejector rod 310 any more, and the first swing arm 210 and the second swing arm 220 are close to each other again under the elastic force of the elastic rubber ring 230. As the telescopic ram 310 retracts, the base assembly 240 will also slide away from the datum plate 120, the clamping probe portion 211 again partially retracts into the receiving cavity 110, and the motorized spindle female clamping jig 10 returns to the original state. At this time, the electric spindle 20 is no longer supported by the elastic rubber ring 230, and can be smoothly removed.

In this way, the elastic rubber ring 230 is matched with the inner wall of the electric spindle 20 to fix the electric spindle 20. Compared with the traditional clamping mode, the elastic rubber ring 230 is not matched with the surface in a point-surface mode, but is matched with the surface in a surface-surface mode, so that the stress area is greatly increased, the unit pressure intensity is reduced, and the inner wall of the electric spindle 20 is not easily scratched. Moreover, since the elastic rubber ring 230 is made of a soft material, it is elastically deformed during clamping, so that it is more tightly attached to the inner wall of the electric spindle 20, and the friction coefficient between the two is increased, so that the electric spindle 20 is more firm after being fixed.

It is emphasized that the elastomeric ring 230 has two functions: firstly, when the clamping probe 211 is unfolded, the elastic rubber ring 230 is in abutting fit with the inner wall of the electric spindle 20, and the elastic rubber ring 230 plays a role in clamping and fixing; secondly, when the telescopic ejector rod 310 is retracted, the retraction force of the elastic rubber ring 230 provides the restoring force for the first swing arm 210 and the second swing arm 220 to approach each other, and the elastic rubber ring 230 plays a role in promoting the restoration.

Further, when the telescopic ram 310 moves (retracts) in the opposite direction, the telescopic ram 310 needs to retract from between the first swing arm 210 and the second swing arm 220, and then drives the base assembly 240 to slide in the opposite direction. However, in use, it is found that the clamping between the force application inclined surface 311 and the guide inclined surface 213 is easy to occur, so that the telescopic ejector rod 310 drives the base assembly 240 to slide first, and then retract from between the first swing arm 210 and the second swing arm 220. This causes the clamping probe portion 211 to slide a certain distance inside the electric spindle 20, which is liable to damage the inner wall of the electric spindle 20. The present utility model has been devised in order to solve this problem.

Specifically, the telescopic ejector rod 310 is disposed between the upper support plate 241 and the lower support plate 242, as shown in fig. 4, an accommodating groove 312 is formed on the telescopic ejector rod 310, an elastic member 313 is disposed in the accommodating groove 312, the limit bolt 244 extends into the accommodating groove 312, and two ends of the elastic member 313 respectively abut against the limit bolt 244 and the groove wall of the accommodating groove 312.

In use, when clamping is performed, the telescopic ejector rod 310 moves forward to drive the base assembly 240 to slide, and after the base assembly 240 abuts against the reference panel 120, the telescopic ejector rod 310 continues to move forward, and the telescopic elastic member 313 is compressed. When the clamp is released, the telescopic ram 310 moves in the opposite direction, the telescopic elastic member 313 begins to extend and apply a pushing force to the limit bolt 244, so that the base assembly 240 is always held against the reference panel 120. In this way, at the initial stage of the opposite movement of the telescopic ejector rod 310, the base assembly 240 is kept still under the action of the telescopic elastic member 313, and the telescopic ejector rod 310 is displaced relative to the clamping probe 211, that is, the telescopic ejector rod 310 is retracted from between the first swing arm 210 and the second swing arm 220; after the retraction, the elastic force of the telescopic elastic member 313 is completely released, and the base assembly 240 can slide under the driving of the telescopic ejector rod 310. In this way, the step that the telescopic ejector rod 310 firstly retracts from between the first swing arm 210 and the second swing arm 220 and then drives the base assembly 240 to slide in the opposite direction is realized, so that the condition that the clamping probe 211 damages the inner wall of the motorized spindle 20 is avoided.

In order to make the sliding of the base assembly 240 in the accommodating cavity 110 smoother, in one embodiment, the lower support plate 242 is provided with a sliding block 245 (as shown in fig. 6), the accommodating cavity 110 of the base 100 is provided with a sliding rail 111 (as shown in fig. 4) matching with the sliding block 245, and the base assembly 240 is slidably disposed on the sliding rail 111 through the sliding block 245. Cooperation of the slider 245 and the slide rail 111 guiding and limiting effects are achieved.

In one embodiment, the clamping probe 211 is provided with an annular positioning groove 214 (as shown in fig. 6), and the elastic rubber ring 230 is clamped in the annular positioning groove 214. The elastic rubber ring 230 can adopt a high-strength rubber structure, and the high-strength rubber has certain rigidity while taking the elasticity of materials into consideration, and can be clamped and matched with the annular positioning groove 214 more tightly.

Preferably, as shown in fig. 9 and 10, the cross section of the elastic rubber ring 230 is a T-shaped structure, and the cross section of the elastic rubber ring 230 includes a positioning portion 231 and a contact portion 232, and the positioning portion 231 is sunk into the annular positioning groove 214. In use, the positioning portion 231 is retained in the annular positioning groove 214 for limiting and fixing, and the contact portion 232 abuts against the inner wall of the motorized spindle 20. The contact area between the elastic rubber ring 230 and the inner wall of the electric spindle 20 can be obviously enlarged due to the design of the T-shaped structure, so that the effective stress area during clamping is increased, the pressure intensity in unit area is reduced, and the inner wall of the electric spindle 20 is better protected.

In one embodiment, the end of the clamping probe portion 211 is provided with a rounded chamfer 215 (as shown in FIG. 6). When clamping is performed, a worker sleeves the electric spindle 20 on the outer part of the clamping probe part 211, and the circular chamfer 215 can provide guidance for the electric spindle 20, so that the electric spindle 20 is easier to sleeve on the clamping probe part 211.

In summary, the clamping fixture 10 for the inner hole of the electric spindle can stably clamp and fix the inner hole of the electric spindle 20, protect the electric spindle 20 from being damaged, and improve the yield.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. Electric main shaft hole centre gripping tool, its characterized in that includes: a base seat a movable clamping member and a driving member; the base is provided with an accommodating cavity, the movable clamping part is arranged in the accommodating cavity in a sliding manner, and the driving part is used for driving the movable clamping part;

2. The motorized spindle female clamping jig of claim 1, wherein the base assembly comprises: the device comprises an upper supporting plate, a lower supporting plate, supporting bolts and limiting bolts;

3. The clamping jig for an inner hole of an electric spindle according to claim 2, wherein the telescopic ejector rod is arranged between the upper supporting plate and the lower supporting plate, a containing groove is formed in the telescopic ejector rod, a telescopic elastic piece is arranged in the containing groove, the limit bolt extends into the containing groove, and two ends of the telescopic elastic piece are respectively abutted against the limit bolt and the groove wall of the containing groove.

4. The motorized spindle inner hole clamping jig according to claim 2, wherein a sliding block is arranged on the lower supporting plate, a sliding rail matched with the sliding block is arranged in the accommodating cavity of the base, and the base assembly is slidably arranged on the sliding rail through the sliding block.

5. The motorized spindle female clamping jig of claim 2, wherein, the first swing arm and the second swing arm are both provided with a hinge part, the hinge part is rotationally arranged on the supporting bolt, and a bearing is arranged between the hinge part and the supporting bolt.

6. The clamping jig for the inner hole of the motorized spindle according to claim 1, wherein a force application inclined plane is arranged at the end part of the telescopic ejector rod, guide inclined planes are arranged at the clamping probe parts of the first swing arm and the second swing arm, and the force application inclined plane and the guide inclined plane are mutually abutted and matched.

7. The clamping jig for the inner hole of the motorized spindle according to claim 1, wherein the clamping probe part is provided with an annular positioning groove, and the elastic rubber ring is clamped in the annular positioning groove; the outer ring of the elastic rubber ring has large diameter at the diameter of the gripping probe portion.

8. The motorized spindle inner hole clamping jig according to claim 7, wherein the cross section of the elastic rubber ring is of a T-shaped structure, the cross section of the elastic rubber ring comprises a positioning portion and a contact portion, and the positioning portion is sunk into the annular positioning groove.

9. The motorized spindle female clamping jig according to claim 7, the elastic rubber ring is characterized by being of a high-strength rubber structure.

10. The motorized spindle female clamping jig of claim 7, wherein the end of the clamping probe portion is provided with a rounded chamfer.