CN112658762A - Wheel rim turning clamp - Google Patents

Abstract

The invention belongs to the technical field of machining, and discloses a rim turning clamp which comprises a bearing plate fixed on a lathe spindle, a positioning mechanism, a clamping mechanism and a transmission mechanism, wherein the positioning mechanism can move along the radial direction of the spindle to support or release a rim, the clamping mechanism can move along the axial direction of the spindle to clamp or release the rim, the bottom of the transmission mechanism can penetrate through the bearing plate and is fixedly connected with a piston of an oil cylinder, the transmission mechanism is in transmission connection with the positioning mechanism and the clamping mechanism, when the piston is in a contraction state, the transmission mechanism can drive the positioning mechanism to support the rim and drive the clamping mechanism to clamp the rim, and when the piston is in an extension state, the transmission mechanism can drive the positioning mechanism to release the rim and drive the clamping mechanism to release the rim. The center and the end face of the rim are positioned simultaneously, and the rim is prevented from being elastically deformed along the end face when being supported, so that the machining precision of the rim is improved.

Description

Wheel rim turning clamp

Technical Field

The invention relates to the technical field of machining, in particular to a rim turning clamp.

Background

With the continuous development of manufacturing industry, because the rotary swaging process has the advantages of small deformation resistance, small machine quality, stable work, no vibration and easy realization of automatic production, the rotary swaging process is widely applied to processing of rims of automobile rims, and the rims are usually turned after the rotary swaging processing is finished so as to improve the roundness and the flatness of the rims.

The inner ring of the rim is used to mount spokes to support the rim, so that no reinforcing ribs are usually provided on the rim, making the rim less rigid.

Before lathe machining, an inner ring of a rim supported by a hydraulic chuck is generally adopted to perform turning operation, however, when the hydraulic chuck supports the inner ring of the rim, the rim bears large stress, and because the end surface of the rim is not fixed, when the rim is supported by the hydraulic chuck, the rim generates elastic deformation along the end surface, so that the finished rim recovers the elastic deformation after being taken down from the hydraulic chuck, and the machining precision of the rim is unqualified.

Therefore, it is desirable to provide a turning jig to solve the above problems.

Disclosure of Invention

The invention aims to provide a rim turning clamp to solve the problem that a rim can be elastically deformed along the end surface when the rim is supported by a hydraulic chuck.

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

a rim turning fixture disposed on a lathe, the lathe including a spindle and a cylinder disposed in an inner cavity of the spindle, the rim turning fixture configured to secure a rim to a machining position of the lathe, the rim turning fixture comprising:

the bearing plate is fixedly connected to a main shaft of the lathe;

the positioning mechanism is arranged on the bearing plate and can move along the radial direction of the main shaft so as to support or release the rim;

the clamping mechanism is arranged on the bearing plate and can move along the axial direction of the main shaft so as to clamp or release the rim; and

the bottom of the transmission mechanism can penetrate through the bearing plate and is fixedly connected with the piston of the oil cylinder, and the transmission mechanisms are in transmission connection with the positioning mechanism and the clamping mechanism;

when the piston is in a contraction state, the transmission mechanism can drive the positioning mechanism to support the wheel rim and drive the clamping mechanism to clamp the wheel rim; when the piston is in an extending state, the transmission mechanism can drive the positioning mechanism to release the rim and drive the clamping mechanism to release the rim.

Preferably, the transmission mechanism includes a guide portion, a connecting portion, and a connecting shaft, wherein:

the guide part is arranged and fixed at the top end of the connecting shaft and can penetrate through the top of the bearing plate, and the guide part is connected to the positioning mechanism in a sliding manner;

the connecting part is arranged and fixed at the middle section of the connecting shaft, the first end of the clamping mechanism is hinged to the connecting part, the other end of the clamping mechanism can extend out of the top of the bearing plate, the middle section of the clamping mechanism is hinged to a first hinged shaft on the bearing plate, and the first hinged shaft extends in the horizontal direction;

the bottom end of the connecting shaft is fixedly connected with the piston, and when the connecting shaft is in a falling state, the connecting shaft can drive the positioning mechanism to support the wheel rim and drive the clamping mechanism to clamp the wheel rim;

when the connecting shaft is in a jacking state, the transmission mechanism can drive the positioning mechanism to release the rim and drive the clamping mechanism to release the rim.

As preferred, drive mechanism is including apron, elastic component, guide part, ejector pin, connecting portion and the connecting axle that sets gradually, wherein:

the cover plate is fixed and covered on the top surface of the bearing plate, two ends of the elastic piece are fixedly connected to the bottom surface of the cover plate and the guide part respectively, the top of the ejector rod is fixedly connected to the guide part, the ejector rod can penetrate through the bearing plate, the ejector rod and the connecting shaft are arranged at intervals, the connecting part is fixedly connected to the connecting shaft, and the bottom end of the connecting shaft is fixedly connected to the piston;

the positioning mechanism is connected to the guide part in a sliding mode, a first end of the clamping mechanism is hinged to the connecting part, a second end of the clamping mechanism can extend out of the top of the bearing plate, the middle section of the clamping mechanism is hinged to a first hinged shaft located on the bearing plate, and the first hinged shaft extends in the horizontal direction;

when the connecting shaft is in a falling state, the connecting shaft is separated from the ejector rod, and the guide part is pressed against the bearing plate by the elastic piece, so that the positioning mechanism supports the wheel rim and drives the clamping mechanism to clamp the wheel rim;

when the connecting shaft is in a jacking state, the connecting shaft props up the ejector rod so as to drive the positioning mechanism to release the wheel rim and drive the clamping mechanism to release the wheel rim.

Preferably, the guide portion is provided with a first sliding groove, and the first sliding groove is gradually close to the rotating shaft of the connecting shaft in the axial direction from the connecting shaft to the main shaft;

when the connecting shaft is in the falling state, the positioning mechanism can support the wheel rim;

when the connecting shaft is in the jacking state, the positioning mechanism can release the rim.

Preferably, the first sliding groove is a T-shaped groove, and the positioning mechanism includes:

the first sliding block is connected to the T-shaped groove in a sliding mode and can slide along the radial direction of the main shaft when the connecting shaft is lifted;

the second sliding block is arranged on the bearing plate and can slide along the radial direction of the main shaft, and the second sliding block is fixedly connected to the first sliding block; and

and the positioning block is fixedly connected with the second sliding block and can be abutted to the wheel rim.

Preferably, a connecting block is further arranged between the second sliding block and the positioning block, wherein:

the top surface of the second sliding block and the bottom surface of the connecting block are both provided with anti-skidding teeth, and the positioning block is fixedly connected to the connecting block;

the second sliding block is provided with a threaded hole, and the connecting block is provided with a through hole corresponding to the threaded hole, so that an external bolt can tightly press the connecting block on the second sliding block.

Preferably, the connecting portion includes a connecting plate and a flange, wherein:

the middle section of connecting axle is provided with the shaft shoulder, the top surface butt of connecting plate in the bottom surface of shaft shoulder, the bottom surface butt of ring flange in the top surface of shaft shoulder, the ring flange rigid coupling in the connecting plate, fixture's first end articulate in the connecting plate.

Preferably, the clamping mechanism includes:

the bearing seat is arranged on the bearing plate and is configured to bear the rim;

the first end of the clamping plate is hinged to the connecting plate, the second end of the clamping plate extends out of the top of the bearing plate, the middle section of the clamping plate is hinged to the first hinge shaft, and the first hinge shaft is arranged between the first end and the axis of the connecting shaft;

when the connecting axle is in during the whereabouts state, the second end of grip block winds first articulated shaft is along being close to the direction of bearing the seat rotates extremely bear the top of seat, in order with the wheel rim support press in bear the seat, work as the connecting axle is in during the jacking state, the second end of grip block winds first articulated shaft is along keeping away from bear the direction of seat and roll out bear the top of seat, in order to release to be located bear on the seat the wheel rim.

Preferably, the middle section of grip block is provided with the guide way, works as the grip block is in when the whereabouts state, first articulated shaft slides to the groove top of guide way, so that the second end swing extremely bear the top of seat, works as the grip block is in when the jacking state, first articulated shaft slides to the tank bottom of guide way, so that the second end swings out bear the top of seat.

Preferably, the carrier plate includes a top plate and a bottom plate disposed at an interval, wherein:

the positioning mechanism and the bearing seat are both arranged on the top surface of the top plate, and a guide shaft is arranged between the top plate and the bottom plate;

the first articulated shaft is arranged on the top plate, the connecting plate is arranged between the top plate and the bottom plate, and the connecting plate is connected with the guide shaft in a sliding mode.

The invention has the beneficial effects that: the clamping mechanism and the positioning mechanism which are connected to the transmission mechanism are arranged on the bearing plate, so that the clamping mechanism can fix the end face of the wheel rim, and when the piston drives the transmission mechanism, the transmission mechanism can drive the clamping mechanism and the positioning mechanism to position and fix the wheel rim together, the wheel rim is prevented from being elastically deformed along the end face of the wheel rim, and the machining precision of the wheel rim is improved.

Drawings

Fig. 1 is a schematic structural diagram of a rim machining fixture according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic cross-sectional view A-A of the rim machining fixture of FIG. 2 in a clamped state;

FIG. 4 is a cross-sectional view of the rim machining fixture in a released state according to the first embodiment;

FIG. 5 is an enlarged view of a portion of FIG. 1 at L;

fig. 6 is a cross-sectional view of a rim machining fixture in a clamped state according to a second embodiment of the present invention;

fig. 7 is a cross-sectional view of the rim machining jig according to the second embodiment of the present invention in a released state.

In the figure:

11. a top plate; 111. a first hinge shaft; 12. a base plate; 13. a guide shaft;

2. a positioning mechanism; 21. a base; 22. a second slider; 23. connecting blocks; 24. positioning blocks; 25. a first slider;

3. a clamping mechanism; 31. a bearing seat; 32. a clamping plate; 321. a connecting rod; 3211. a second hinge shaft; 3212. a guide groove; 322. a pressure head;

41. a connecting shaft; 42. a connecting plate; 43. a top rod; 44. a guide portion; 45. and (7) a cover plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element 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" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

The embodiment provides a rim turning clamp, which aims to solve the problem that when a rim is supported by a hydraulic chuck, the rim can elastically deform along the end face of the rim.

Referring to fig. 1 to 5, the rim turning fixture is disposed on a lathe, the lathe includes a main shaft and an oil cylinder disposed in an inner cavity of the main shaft, the oil cylinder can be in an extended state and a retracted state, and the oil cylinder rotates along with the main shaft. The rim turning jig is configured to fix a rim to a machining position of a lathe, and includes a bearing plate, a positioning mechanism 2, a clamping mechanism 3, and a transmission mechanism. The loading board includes roof 11 and bottom plate 12, and roof 11 sets up with bottom plate 12 interval to on roof 11 is fixed in bottom plate 12, bottom plate 12 rigid coupling in the main shaft of lathe, so that the main shaft of lathe drives the loading board and rotates.

The positioning mechanism 2 is arranged on the top plate 11, and the positioning mechanism 2 can move along the radial direction of the main shaft to support or release an inner ring of the rim placed in the rim machining clamp, so that the rotating shaft of the rim can be positioned, and the rotating shaft of the rim is overlapped with the rotating shaft of the lathe main shaft. The clamping mechanism 3 is arranged on the bearing plate, and the clamping mechanism 3 can move along the axial direction of the main shaft so as to clamp or release the inner ring end face of the rim placed in the rim turning clamp. The bottom of the transmission mechanism can penetrate through the bottom plate 12 and is fixedly connected with the piston of the oil cylinder, and the transmission mechanism is in transmission connection with the positioning mechanism 2 and the clamping mechanism 3.

When the piston is in a contraction state, the transmission mechanism can drive the positioning mechanism 2 to support the rim and drive the clamping mechanism 3 to clamp the rim. When the piston is in the extending state, the transmission mechanism can drive the positioning mechanism 2 to release the rim and drive the clamping mechanism 3 to release the rim.

The end face of the inner ring of the rim is fixed through the clamping mechanism 3, and when the piston drives the transmission mechanism, the transmission mechanism can simultaneously drive the positioning mechanism 2 and the clamping mechanism 3 to fix or release the rim in the action process, so that the rim is prevented from elastically deforming along the end face of the rim, and the processing precision of the rim is improved.

With the above structure, specifically, in the present embodiment, the transmission mechanism includes the guide portion 44, the connecting portion, the connecting shaft 41 and the push rod 43. In the present embodiment, the push rod 43 is a part of the connecting shaft 41 and is disposed on the top of the connecting shaft 41, since the push rod 43 is disposed on the connecting shaft 41 by a bolt for easy maintenance and replacement. In other embodiments, the connecting shaft 41 may be obtained by welding or directly by turning, without limitation.

The guide part 44 is arranged and fixed on the top rod 43 at the top end of the connecting shaft 41 and can penetrate through the top of the top plate 11, and the guide part 44 is connected with the positioning mechanism 2 in a sliding mode.

The connecting portion is disposed between the top plate 11 and the bottom plate 12 and fixed to a middle section of the connecting shaft 41, a first end of the clamping mechanism 3 is hinged to the second hinge shaft 3211 on the connecting portion, the other end of the clamping mechanism 3 can extend out of the top plate 11, and the middle section of the clamping mechanism 3 is hinged to the first hinge shaft 111 on the top plate 11, and the first hinge shaft 111 extends in a horizontal direction.

The bottom end of the connecting shaft 41 is fixedly connected to a piston of the oil cylinder, when the piston is in a contraction state, the connecting shaft 41 is in a falling state, and the connecting shaft 41 can drive the positioning mechanism 2 to slide along the radial direction of the main shaft away from the rotating shaft of the main shaft so as to support the inner ring of the rim. And the connecting shaft 41 drives the clamping mechanism 3 to rotate around the first hinge shaft 111 so as to clamp the end surface of the inner ring of the rim.

When the piston is in the extended state, the connecting shaft 41 is in the jacking state, and the transmission mechanism can drive the positioning mechanism 2 to slide along the radial direction of the main shaft towards the direction of the rotating shaft of the main shaft, so as to release the rim. And the connecting shaft 41 drives the clamping mechanism 3 to rotate around the first hinge shaft 111 to release the end surface of the inner ring of the rim.

It can be understood that, when the clamping mechanism 3 rotates around the first hinge shaft 111, the specific position relationship between the first hinge shaft 111 and the second hinge shaft 3211 can be set to determine the clamping action and the releasing action of the clamping mechanism 3 when the clamping mechanism 3 rotates clockwise or counterclockwise around the first hinge shaft 111, which is not limited herein.

Further, in order to make the positioning mechanism 2 move more firmly along the radial direction of the main shaft, the guide portion 44 is provided with a first sliding slot, and in the axial direction from the connecting shaft 41 to the main shaft, the guide slot 3212 is gradually close to the rotating shaft of the connecting shaft 41, so that when the connecting shaft 41 falls, the positioning mechanism 2 can slide along the radial direction of the main shaft away from the direction of the rotating shaft of the main shaft, so that when the connecting shaft 41 is in a falling state, the positioning mechanism 2 can support the inner ring of the rim; when the connecting shaft 41 is lifted, the positioning mechanism 2 can slide along the radial direction of the main shaft toward the direction of the main shaft rotating shaft, and when the transferring connecting shaft 41 is in a lifting state, the positioning mechanism 2 can release the inner ring of the rim.

In order to enable the connecting shaft 41 to drive the positioning mechanism 2 to slide when lifting, the first sliding groove may be a T-shaped groove, the positioning mechanism 2 includes a first sliding block 25, a second sliding block 22, a base 21 and a positioning block 24, and the first sliding block 25 is slidably connected to the T-shaped groove and can slide along the radial direction of the main shaft when the connecting shaft 41 is lifted. The base 21 is fixed on the top plate 11, a second sliding groove is arranged on the base 21, the second sliding groove extends along the radial direction of the main shaft, and the second sliding block 22 is connected to the base 21 in a sliding mode. The second slider 22 is fixed to the first slider 25 so that the second slider 22 can slide along the extending direction of the second sliding groove. The positioning block 24 is fixedly connected to the second slider 22, so that the second slider 22 drives the positioning block 24 to abut against or release the rim.

Further, in order to enable the positioning mechanism 2 to adjust the position according to the sizes of the inner rings of different rims, a connecting block 23 is further arranged between the second slider 22 and the positioning block 24, anti-slip teeth are arranged on the top surface of the second slider 22 and the bottom surface of the connecting block 23, the positioning block 24 is fixedly connected to the connecting block 23, a threaded hole is formed in the second slider 22, a through hole corresponding to the threaded hole is formed in the connecting block 23, so that an external bolt can press the connecting block 23 to the second slider 22, the distance between the positioning block 24 and the second slider 22 is adjusted through the anti-slip teeth on the top surface of the second slider 22 and the bottom surface of the connecting block 23, and the positioning block 24 is pressed to the second slider 22 through the bolt, so that the positioning mechanism 2 can stably support rims of different specifications.

Further, in order to enable the connecting shaft 41 to stably drive the clamping mechanism 3, a shoulder is disposed at the middle section of the connecting shaft 41, the top surface of the connecting plate 42 abuts against the bottom surface of the shoulder, the bottom surface of the flange abuts against the top surface of the shoulder, the flange is fixedly connected to the connecting plate 42 to stably fix the connecting portion to the connecting shaft 41, and the second hinge shaft 3211 at the first end of the clamping mechanism 3 is hinged to the connecting plate 42, so that the connecting shaft 41 can stably drive the clamping mechanism 3 to clamp or release the rim.

Further, in order to optimize the structure of the clamping mechanism 3, the clamping mechanism 3 includes a bearing seat 31 and a clamping plate 32. The bearing seat 31 is disposed on the top plate 11, and the bearing seat 31 is configured to bear a rim placed in the rim machining jig.

Further, in order to enable the clamping mechanism 3 to clamp rims of different specifications, the top plate 11 is provided with slide rails extending along the radial direction of the main shaft, and the bearing seat 31 can be slidably connected to the slide rails and can slide along the radial direction of the main shaft, so that the bearing seat 31 can bear rims of different specifications.

The clamping plate 32 includes a connecting rod 321 and a pressing head 322, the pressing head 322 is fixed on the connecting rod 321, and the pressing head 322 is disposed at the second end of the clamping plate 32. The second hinge shaft 3211 of the first end of the clamping plate 32 is hinged to the connecting plate 42, the second end of the clamping plate 32 extends out of the top of the loading plate, the middle section of the clamping plate 32 is hinged to the first hinge shaft 111 on the top plate 11, and the first hinge shaft 111 is disposed between the second hinge shaft 3211 at the first end and the axis of the connecting shaft 41.

When the connecting shaft 41 falls, the pressing head 322 on the second end of the clamping plate 32 rotates around the first hinge shaft 111 to the upper side of the bearing seat 31 in the direction close to the bearing seat 31, and when the connecting shaft 41 is in the falling state, the pressing head 322 presses the end surface of the rim against the bearing seat 31, when the connecting shaft 41 rises, the second end of the clamping plate 32 rotates around the first hinge shaft 111 out of the upper side of the bearing seat 31 in the direction away from the bearing seat 31, and when the connecting shaft 41 is in the jacking state, the pressing head 322 releases the rim on the bearing seat 31.

Further, in order to optimize a rotation path of the chucking plate 32, a guide groove 3212 is provided at a middle section of the chucking plate 32, and the chucking plate 32 is rotatable about the second hinge shaft 3211 and swings in an extending direction of the guide groove 3212. When the clamping plate 32 is in the falling state, the second hinge shaft 3211 slides to the top of the guide groove 3212, so that the pressing head 322 swings to the top of the bearing seat 31, and when the clamping plate 32 is in the jacking state, the second hinge shaft 3211 slides to the bottom of the guide groove 3212, so that the second end swings out of the top of the bearing seat 31.

Further, in order to make the connecting plate 42 firmly drive the clamping plate 32 to rotate, a guide shaft 13 is arranged between the top plate 11 and the bottom plate 12, the guide shaft 13 extends along the axial direction of the main shaft, and the connecting plate 42 is slidably connected to the guide shaft 13, so that the connecting plate 42 can stably slide along the axial direction of the main shaft along with the connecting shaft 41.

It can be understood that, since three points can locate a plane and three points can locate a circle, in the present embodiment, the positioning mechanism 2 is provided with three positioning blocks 24 that are equidistantly spaced, and the included angle between the sliding directions of two adjacent positioning blocks 24 is 120 degrees. The clamping mechanism 3 is provided with three groups of bearing seats 31 and clamping plates 32, and each group of bearing seat 31 and clamping plate 32 is arranged between two adjacent positioning blocks 24, so that the layout of the rim machining clamp is more reasonable.

Example two

In order to solve the problem that the force of the positioning mechanism 2 for supporting the rim is provided by the piston of the oil cylinder, and the force provided by the oil cylinder is large, the rim may be supported and deformed by the positioning mechanism 2, so that the precision of the turning operation is reduced, the embodiment is different from the first embodiment in that the structure of the transmission mechanism is different, and the manner of driving the positioning mechanism 2 for supporting the rim is different.

Specifically, as shown in fig. 6 and 7, in this embodiment, the transmission mechanism includes a cover plate 45, an elastic member, a guide portion 44, a push rod 43, a connecting portion, and a connecting shaft 41, which are sequentially disposed, the cover plate 45 is fixed and covered on the top surface of the top plate 11, two ends of the elastic member are respectively and fixedly connected to the bottom surface of the cover plate 45 and the guide portion 44, the top of the push rod 43 is fixedly connected to the guide portion 44, the push rod 43 can penetrate through the top plate 11, the push rod 43 and the connecting shaft 41 are disposed at an interval, the connecting portion is fixedly connected to the connecting shaft 41, and the bottom end of the connecting shaft 41.

The positioning mechanism 2 is slidably connected to the guide portion 44, the first end of the clamping mechanism 3 is hinged to the connecting portion, the second end of the clamping mechanism 3 can extend out of the top plate 11, the middle section of the clamping mechanism 3 is hinged to a first hinge shaft 111 located on the bearing plate, and the first hinge shaft 111 extends in the horizontal direction.

When the connecting shaft 41 is in a falling state, the connecting shaft 41 is separated from the ejector rod 43, and the guide part 44 is pressed on the top plate 11 by the elastic piece, so that the positioning mechanism 2 can support the rim and drive the clamping mechanism 3 to clamp the rim; when the connecting shaft 41 is in the jacking state, the connecting shaft 41 props up the jacking rod 43 so as to drive the positioning mechanism 2 to release the rim and drive the clamping mechanism 3 to release the rim, and the elastic force provided by the elastic piece is converted into the force for supporting the rim by the positioning mechanism 2, so that the phenomenon that the rim is supported and deformed by the positioning mechanism 2 due to the fact that the force provided by the oil cylinder is large is avoided.

Preferably, the elastic member may be a spring with an outer diameter of 40mm, and the pressure of the guide portion 44 pressed against the top plate 11 by the spring is no more than 1280N, so that the positioning mechanism 2 can firmly support the rim.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A rim turning jig provided on a lathe including a main shaft and a cylinder provided in an inner cavity of the main shaft, the rim turning jig being configured to fix a rim to a machining position of the lathe, the rim turning jig comprising:

the bearing plate is fixedly connected to a main shaft of the lathe;

the positioning mechanism (2) is arranged on the bearing plate, and the positioning mechanism (2) can move along the radial direction of the main shaft so as to support or release the wheel rim;

the clamping mechanism (3) is arranged on the bearing plate, and the clamping mechanism (3) can move along the axial direction of the main shaft so as to clamp or release the rim; and

the bottom of the transmission mechanism can penetrate through the bearing plate and is fixedly connected with the piston of the oil cylinder, and the transmission mechanisms are in transmission connection with the positioning mechanism (2) and the clamping mechanism (3);

when the piston is in a contraction state, the transmission mechanism can drive the positioning mechanism (2) to support the rim and drive the clamping mechanism (3) to clamp the rim; when the piston is in an extending state, the transmission mechanism can drive the positioning mechanism (2) to release the rim and drive the clamping mechanism (3) to release the rim.

2. A rim machining clamp according to claim 1, characterized in that the transmission mechanism comprises a guide portion (44), a connecting portion and a connecting shaft (41), wherein:

the guide part (44) is arranged and fixed at the top end of the connecting shaft (41) and can penetrate through the top of the bearing plate, and the guide part (44) is connected to the positioning mechanism (2) in a sliding manner;

the connecting part is arranged and fixed at the middle section of the connecting shaft (41), the first end of the clamping mechanism (3) is hinged to the connecting part, the other end of the clamping mechanism (3) can extend out of the top of the bearing plate, the middle section of the clamping mechanism (3) is hinged to a first hinged shaft (111) on the bearing plate, and the first hinged shaft (111) extends in the horizontal direction;

the bottom end of the connecting shaft (41) is fixedly connected with the piston, and when the connecting shaft (41) is in a falling state, the connecting shaft (41) can drive the positioning mechanism (2) to support the rim and drive the clamping mechanism (3) to clamp the rim;

when the connecting shaft (41) is in a jacking state, the transmission mechanism can drive the positioning mechanism (2) to release the rim and drive the clamping mechanism (3) to release the rim.

3. The rim machining jig according to claim 1, wherein the transmission mechanism includes a cover plate (45), an elastic member, a guide portion (44), a carrier rod (43), a connecting portion, and a connecting shaft (41) which are arranged in this order, wherein:

the cover plate (45) is fixed and covered on the top surface of the bearing plate, two ends of the elastic piece are fixedly connected to the bottom surface of the cover plate (45) and the guide part (44) respectively, the top of the ejector rod (43) is fixedly connected to the guide part (44), the ejector rod (43) can penetrate through the bearing plate, the ejector rod (43) and the connecting shaft (41) are arranged at intervals oppositely, the connecting part is fixedly connected to the connecting shaft (41), and the bottom end of the connecting shaft (41) is fixedly connected to the piston;

the positioning mechanism (2) is connected to the guide part (44) in a sliding manner, a first end of the clamping mechanism (3) is hinged to the connecting part, a second end of the clamping mechanism (3) can extend out of the top of the bearing plate, the middle section of the clamping mechanism (3) is hinged to a first hinged shaft (111) on the bearing plate, and the first hinged shaft (111) extends in the horizontal direction;

when the connecting shaft (41) is in a falling state, the connecting shaft (41) is separated from the ejector rod (43), and the guide part (44) is pressed against the bearing plate by the elastic piece, so that the positioning mechanism (2) supports the rim and drives the clamping mechanism (3) to clamp the rim;

when the connecting shaft (41) is in a jacking state, the connecting shaft (41) props up the ejector rod (43) so as to drive the positioning mechanism (2) to release the rim and drive the clamping mechanism (3) to release the rim.

4. A rim machining jig according to any one of claims 2 or 3, characterized in that the guide portion (44) is provided with a first slide groove, and the first slide groove is gradually close to a rotation axis of the connecting shaft (41) in an axial direction from the connecting shaft (41) to the main shaft;

when the connecting shaft (41) is in the falling state, the positioning mechanism (2) can support the rim;

when the connecting shaft (41) is in the jacking state, the positioning mechanism (2) can release the rim.

5. A rim machining clamp according to claim 4, characterized in that said first runner is a T-shaped groove, said positioning mechanism (2) comprising:

the first sliding block (25) is connected to the T-shaped groove in a sliding mode and can slide along the radial direction of the main shaft when the connecting shaft (41) is lifted;

the second sliding block (22) is arranged on the bearing plate and can slide along the radial direction of the main shaft, and the second sliding block (22) is fixedly connected to the first sliding block (25); and

and the positioning block (24) is fixedly connected with the second sliding block (22), and the positioning block (24) can be abutted to the rim.

6. Rim machining clamp according to claim 5, characterized in that a connection block (23) is further provided between the second slide (22) and the positioning block (24), wherein:

the top surface of the second sliding block (22) and the bottom surface of the connecting block (23) are both provided with anti-skidding teeth, and the positioning block (24) is fixedly connected to the connecting block (23);

the second sliding block (22) is provided with a threaded hole, and the connecting block (23) is provided with a through hole corresponding to the threaded hole, so that an external bolt can press the connecting block (23) onto the second sliding block (22).

7. A rim machining clamp according to any one of claims 2 or 3, characterized in that the connecting portion comprises a connecting plate (42) and a flange plate, wherein:

the middle section of connecting axle (41) is provided with the shaft shoulder, the top surface butt of connecting plate (42) in the bottom surface of shaft shoulder, the bottom surface butt of ring flange in the top surface of shaft shoulder, the ring flange rigid coupling in connecting plate (42), the first end of fixture (3) articulate in connecting plate (42).

8. A rim machining clamp according to claim 7, characterized in that the clamping mechanism (3) comprises:

a bearing seat (31) arranged on the bearing plate, wherein the bearing seat (31) is configured to bear the rim;

the first end of the clamping plate (32) is hinged to the connecting plate (42), the second end of the clamping plate (32) extends out of the top of the bearing plate, the middle section of the clamping plate (32) is hinged to the first hinge shaft (111), and the first hinge shaft (111) is arranged between the first end and the axis of the connecting shaft (41);

when connecting axle (41) is in when the whereabouts state, the second end of grip block (32) winds first articulated shaft (111) is along being close to bear the direction of seat (31) and rotate extremely bear the top of seat (31), with the wheel rim to push against in bear seat (31), work as connecting axle (41) are in when the jacking state, the second end of grip block (32) winds first articulated shaft (111) is along keeping away from bear the direction of seat (31) and turn out bear the top of seat (31), in order to release to be located bear the wheel rim on the seat (31).

9. The rim machining jig according to claim 8, wherein a guide groove (3212) is formed in a middle section of the clamping plate (32), the first hinge shaft (111) slides to a top of the guide groove (3212) when the clamping plate (32) is in the falling state, so that the second end swings to above the bearing seat (31), and the first hinge shaft (111) slides to a bottom of the guide groove (3212) when the clamping plate (32) is in the lifting state, so that the second end swings out of the upper side of the bearing seat (31).

10. A rim machining fixture according to claim 8, wherein the carrier plate includes spaced apart top and bottom plates (11, 12), wherein:

the positioning mechanism (2) and the bearing seat (31) are both arranged on the top surface of the top plate (11), and a guide shaft (13) is arranged between the top plate (11) and the bottom plate (12);

the first hinge shaft (111) is arranged on the top plate (11), the connecting plate (42) is arranged between the top plate (11) and the bottom plate (12), and the connecting plate (42) is connected to the guide shaft (13) in a sliding manner.

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