CN216576756U

CN216576756U - Machining clamp for inner hole of center of supporting plate vehicle of heavy truck automobile gearbox

Info

Publication number: CN216576756U
Application number: CN202123447925.5U
Authority: CN
Inventors: 谭舒冕
Original assignee: Chongqing Xidi Gear Co ltd
Current assignee: Chongqing Xidi Gear Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-24
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a heavy truck motor transmission's supporting plate car center hole adds clamping apparatus, its characterized in that: comprises a clamp disc, three positioning sleeves and a pressure plate; a circular truncated cone used for clamping the three-jaw chuck is arranged on one side of the clamp disc, and a positioning surface is arranged on the other side of the clamp disc and is used for being in surface contact fit with the front surface of the supporting plate; three positioning sleeve mounting holes are formed in the other side of the fixture disc, and the distribution centers of the three positioning sleeve mounting holes are consistent with the center of the circular truncated cone; the three positioning sleeves are respectively fixed in the three positioning sleeve mounting holes and are respectively used for inserting three round caps on the supporting plate; an inner groove is also arranged on the other side of the clamp disc; the pressure plate is used for pressing the back surface of the support plate. The utility model discloses can be used to the bearing plate and compress tightly in accurate location when car center hole adds man-hour, can make and satisfy this bearing plate center hole and its each simultaneously after the processing the circle emits the axiality requirement at distribution center and rather than positive straightness's that hangs down technical requirement.

Description

Machining clamp for inner hole of center of supporting plate vehicle of heavy truck automobile gearbox

Technical Field

The utility model relates to a heavy truck motor transmission's supporting plate car center hole adds clamping apparatus.

Background

Referring to fig. 1-4, it is a heavy truck automobile gear box support plate, the support plate needs to be punched and processed to obtain several circular caps (N-3) distributed in circumference when it is produced, then finish-lathing the central bore (N-4) of the support plate on the lathe, and simultaneously, the central bore of the support plate and the distributed center of each circular cap (N-3) are required to be concentric (i.e. coaxiality requirement), and simultaneously, the front face (N-1) of the support plate (N) and the central line of the central bore (N-4) of the support plate have vertical position requirement (i.e. two position requirements relative to the CD reference in fig. 2 are simultaneously satisfied). The conventional lathe three-jaw chuck is adopted for direct clamping, the technical requirements cannot be met simultaneously, and meanwhile, the thickness of the bearing plate is small, and the bearing plate is easy to deform and loosen after clamping, so that a special clamp needs to be designed and researched.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned one or more defect problems that exist among the prior art, the utility model provides a heavy truck motor transmission's supporting plate car center hole adds clamping apparatus.

In order to achieve the above object, the utility model provides a hole adds clamping apparatus in supporting plate car center of heavy truck motor transmission, its characterized in that: comprises a clamp disc, three positioning sleeves and a pressure plate; a circular truncated cone used for clamping the three-jaw chuck is arranged on one side of the clamp disc, and a positioning surface is arranged on the other side of the clamp disc and is used for being in surface contact fit with the front surface of the supporting plate; three positioning sleeve mounting holes are formed in the other side of the fixture disc, and the distribution centers of the three positioning sleeve mounting holes are consistent with the center of the circular truncated cone; the three positioning sleeves are respectively fixed in the three positioning sleeve mounting holes and are respectively used for inserting three round caps on the supporting plate; the other side of the clamp disc is also provided with an inner groove for inserting and limiting other round caps of the supporting plate; the pressure plate is detachably fixed on the clamp disc and is used for pressing the back surface of the support plate.

Preferably, the pressing plate is strip-shaped and has a plurality of pressing plates, and each pressing plate is fixed on the clamp plate through a bolt.

Preferably, the locating sleeve is inserted into the locating sleeve mounting hole and fixed by interference fit.

As a second preferable mode, the pressure plate is annular, and the pressure plate is fixed in the circumferential direction of the clamp disk by a plurality of bolts.

The utility model discloses beneficial effect:

firstly, the utility model can be used for positioning, compressing and clamping the bearing plate of the heavy truck automobile gearbox when the central inner hole of the bearing plate is machined, so that the coaxiality requirement of the central inner hole of the bearing plate and each round cap distribution center and the technical requirement of the front verticality of the central inner hole can be simultaneously met after machining;

secondly, the positioning surface of the clamp disc is provided with an inner groove for inserting and limiting other round caps of the supporting plate; when the clamp disc rotates at a high speed during turning, other round caps of the supporting plate are inserted into the inner grooves of the clamp disc for limiting and are limited to be loosened radially, so that the supporting plate can be prevented from centrifugally jumping or vibrating, the firmness and stability of the position of a workpiece can be guaranteed during processing after the workpiece is compressed, and the processing precision can be guaranteed;

third, the utility model discloses owing to adopt the clamp plate to compress tightly the back of bearing plate and the front of this bearing plate is supported by the big face-to-face contact of anchor clamps dish locating surface, makes this bearing plate compressed tightly by two-sided butt clamp, can avoid because the less problem that warp behind the clamping of its thickness.

Drawings

Fig. 1 is a perspective view of a bearing plate of a heavy truck vehicle transmission.

Fig. 2 is a cross-sectional view a-a of fig. 1.

Figures 3-4 are perspective views of a bearing plate for a heavy truck vehicle transmission.

Fig. 5 is an exploded view of a center inner hole machining fixture of a bearing plate lathe of a heavy truck automobile gearbox in the embodiment.

Fig. 6 is a front view of a center inner hole machining fixture of a bearing plate lathe of a heavy truck automobile gearbox for positioning and pressing a workpiece.

Fig. 7 is a sectional view of B-B in fig. 6.

Fig. 8 is an enlarged view at Q in fig. 7.

Fig. 9 is an enlarged view of fig. 7 at S.

Fig. 10 is a perspective view of a center inner hole machining fixture of a supporting plate lathe of a heavy truck automobile gearbox for positioning and pressing a workpiece.

Fig. 11 is a perspective view of a support plate lathe center inner hole machining fixture of a heavy truck automobile transmission case according to the second embodiment after positioning a workpiece but before pressing the workpiece.

Fig. 12 is a perspective view of a support plate lathe center inner hole machining fixture for a heavy truck automobile transmission according to the second embodiment for positioning and pressing a workpiece.

Fig. 13-14 are perspective views of the chuck plate.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

the first embodiment is as follows: referring to fig. 3-10, a clamp for machining a central inner hole of a bearing plate lathe of a heavy truck automobile gearbox comprises a clamp disc 1, three positioning sleeves 2 and a pressure plate 3.

One side of the fixture disc 1 is provided with a circular truncated cone 1-1 for the three-jaw chuck 4 to clamp, when in use, the three-jaw chuck 4 clamps the circular truncated cone 1-1 of the fixture disc 1, and the three-jaw chuck 4 is concentric with the fixture disc 1.

The other side of the clamp disc 1 is provided with a positioning surface 1-2, and the positioning surface 1-2 is in contact fit with the front surface N-1 of the support plate N during clamping.

Three positioning sleeve mounting holes 1-4 are formed in the other side of the fixture disc 1, and the distribution centers of the three positioning sleeve mounting holes 1-4 are consistent with the center of the circular truncated cone 1-1, so that the centers of the three-jaw chuck 4 (which is concentric with the spindle) and the distribution centers of the three positioning sleeve mounting holes 1-4 can be guaranteed to be consistent.

With reference to fig. 13-14, the three positioning sleeves 2 are respectively fixed in the three positioning sleeve mounting holes 1-4, and the three positioning sleeves 2 are respectively used for inserting and positioning three round caps N-3 on the support plate N. When a workpiece is clamped, the three round caps N-3 on the bearing plate N are respectively inserted into the inner holes of the three positioning sleeves 2, and the three positioning sleeves 2 are fixed and three-point centering positioning is adopted to ensure that the center of the bearing plate N is consistent with the positioning center of the clamp, so that the inner center hole N-4 of the bearing plate N after being turned on the clamp is concentric with the distribution center of each round cap N-3 and the coaxiality requirement is met.

With reference to fig. 13-14, in addition, the positioning surface 1-2 of the clamp plate 1 is provided with an inner groove 1-3 for inserting and limiting the other round caps N-3 of the support plate N. When the lathe is machined, the clamp disc 1 rotates at a high speed, and other round caps N-3 of the support plate N are inserted into the inner grooves 1-3 of the clamp disc 1 for limiting radial displacement, so that the support plate N is prevented from centrifugally shifting or vibrating, the firmness and stability of the position of a workpiece can be kept during machining after the workpiece is compressed, and the machining precision can be ensured.

In addition, the pressing plate 3 is detachably fixed on the clamp disc 1 and is used for pressing the back surface N-2 of the supporting plate N, and the front surface N-1 of the supporting plate N is clung to the positioning surface 1-2, so that the verticality requirement of the front surface N-1 of the supporting plate N and the central hole N-4 in the supporting plate N is met.

In the present embodiment, the pressure plates 3 are strip-shaped and have three numbers, and each of the pressure plates 3 is fixed on the jig disc 1 by bolts 5. The clamp disc 1 is provided with three threaded holes 1-5, and the pressure plate 3 is provided with a hole or a strip-shaped notch 3-1 through which the rod part of the bolt passes.

In this embodiment, the positioning sleeve 2 is inserted into the positioning sleeve mounting holes 1 to 4 and fixed by interference fit.

The three positioning sleeves 2 are fixed in the positioning sleeve mounting holes 1-4 of the fixture disc 1, and the distribution centers of the three positioning sleeves 2 are ensured to be in concentric fit with the circular truncated cone 1-1; and further ensuring that three round caps N-3 on the bearing plate N are respectively inserted into the inner holes of the three fixed positioning sleeves 2 during each workpiece processing, and further ensuring that the positioning center of the bearing plate N can be consistent with the center of the three-jaw chuck (lathe spindle) after each clamping.

In addition, when the round cap N-3 on the support plate N is pulled out of the positioning sleeve 2, the positioning sleeve 2 cannot loosen or fall off. Meanwhile, the locating sleeve 2 can be detached and replaced after being worn.

The utility model discloses a round platform 1-1 of anchor clamps dish 1 is kept pressing from both sides tightly always by three-jaw chuck 4 on the lathe, and this 1 centers of anchor clamps dish are concentric with the lathe spindle.

With reference to fig. 6-10, before machining, a support plate N needs to be placed on the fixture disk 1, three round caps N-3 of the support plate N are respectively inserted into the three positioning sleeves 2 for positioning, and the support plate N is limited to rotate relative to the fixture disk 1, so as to ensure that the support plate N can rotate synchronously with the fixture disk 1. The other circular caps N-3 of the three positioning sleeves 2 can be inserted into the inner concave ring grooves 1-3 to be limited radially, so that the positioning of a workpiece is realized; then the three pressing plates 3 are fixed on the clamp disc 1 through bolts 5 to press three different parts of the back surface N-2 of the support plate N to realize circumferential pressing.

The three circular caps N-3 on the bearing plate N are concentrically consistent with the circular truncated cone 1-1 of the clamp disc 1 after three-point positioning, so that the centers of the circular caps N-3 on the bearing plate N are consistent with the center of a lathe spindle, and meanwhile, the front surface N-1 of the bearing plate N is tightly attached to the positioning surface 1-2, so that the front surface N-1 of the bearing plate N is perpendicular to the center of the lathe spindle.

After the workpiece is positioned and compressed on the clamp, the machine tool is started to work, the main shaft of the machine tool rotates, the bearing plate N and the machine tool rotate concentrically, and the central inner hole of the bearing plate N is machined through turning tool feeding. After the machining is finished, loosening the bolts, taking the three pressing plates 3 off the fixture disc 1, and then pulling the support plate N off the fixture disc 1; and then the next workpiece can be clamped.

This example has the following characteristics and analyses when used:

firstly, the embodiment can be used for positioning, pressing and clamping the bearing plate of the heavy truck automobile gearbox when the central inner hole of the bearing plate is machined, so that the coaxiality requirement of the central inner hole of the bearing plate and the distribution center of each round cap and the technical requirement of the perpendicularity of the central inner hole of the bearing plate and the front surface of the central inner hole can be met simultaneously after the central inner hole of the bearing plate is machined;

secondly, in the embodiment, the positioning surface of the clamp plate is provided with an inner groove for inserting and limiting other round caps of the support plate; when the clamp disc rotates at a high speed during turning, other round caps of the supporting plate are inserted into the inner grooves of the clamp disc for limiting and are limited to be loosened radially, so that the supporting plate can be prevented from centrifugally jumping or vibrating, the firmness and stability of the position of a workpiece can be kept during processing after the workpiece is compressed, and the processing precision can be ensured;

thirdly, in the embodiment, the pressure plate is adopted to press the back surface of the support plate, and the front surface of the support plate is supported by the large-surface contact of the positioning surface of the clamp disc, so that the support plate is pressed by the double-surface opposite clamp, and the problem of deformation after clamping due to small thickness of the support plate can be avoided.

Example two: this embodiment is substantially the same as the first embodiment, and is different from the first embodiment in that:

referring to fig. 11 to 12, in the present embodiment, the pressing plate 3 is ring-shaped, and the pressing plate 3 is fixed to the clamp plate 1 circumferentially by three bolts 5. The pressing plate 3 can press the circumferential edge of the bearing plate and the part close to the circumferential edge in the circumferential direction, so that the pressing plate is firmer, more stable and more reliable after being pressed, and the operation is simpler.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. The utility model provides a hole adds clamping apparatus in supporting plate car center of heavy truck motor transmission which characterized in that: comprises a clamp disc (1), three positioning sleeves (2) and a pressing plate (3);

a circular truncated cone (1-1) used for clamping the three-jaw chuck (4) is arranged on one side of the clamp disc (1), a positioning surface (1-2) is arranged on the other side of the clamp disc (1), and the positioning surface (1-2) is in surface contact fit with the front surface (N-1) of the support plate (N);

three positioning sleeve mounting holes (1-4) are formed in the other side of the clamp disc (1), and the distribution centers of the three positioning sleeve mounting holes (1-4) are consistent with the center of the circular table (1-1);

the three positioning sleeves (2) are respectively fixed in the three positioning sleeve mounting holes (1-4), and the three positioning sleeves (2) are respectively used for inserting three circular caps (N-3) on the support plate (N);

the other side of the clamp disc (1) is also provided with an inner groove (1-3) for inserting and limiting other round caps (N-3) on the support plate (N);

the pressure plate (3) is detachably fixed on the clamp plate (1) and is used for pressing the back surface (N-2) of the support plate (N).

2. The machining fixture for the center inner hole of the bearing plate lathe of the gearbox of the heavy truck as claimed in claim 1, wherein: the pressing plates (3) are strip-shaped and are provided with a plurality of pressing plates, and each pressing plate (3) is fixed on the clamp disc (1) through a bolt (5).

3. The machining fixture for the center inner hole of the bearing plate lathe of the gearbox of the heavy truck as claimed in claim 1, wherein: the locating sleeve (2) is inserted into the locating sleeve mounting hole (1-4) and fixed in an interference fit mode.

4. The machining fixture for the center inner hole of the bearing plate lathe of the gearbox of the heavy truck as claimed in claim 1, wherein: the pressing plate (3) is annular, and the pressing plate (3) is fixed on the circumferential direction of the clamp disc (1) through a plurality of bolts (5).