CN219403329U - Clamp for machining bearing holes on planet carrier - Google Patents

Abstract

The utility model discloses a clamp for machining bearing holes on a planet carrier, and belongs to the technical field of RV reducer planet carrier machining. Comprising the following steps: the device comprises a base, a supporting seat, an inclined plane positioning surface, a pressing assembly, a positioning pin and a floating support; the support seat is fixed on the base, and an accommodating space is arranged in the middle of the support seat and used for accommodating the planet carrier, and the edge of the accommodating space is in contact with the planet carrier and is a planet carrier contact surface; the inclined plane locating surfaces are arranged on the contact surface of the planet carrier and are symmetrically arranged; the plurality of compressing assemblies are used for compressing the end face of the planet carrier and are arranged on the supporting seat; the positioning pin is positioned in the accommodating space and is fixedly connected with the base; the floating support is located in the accommodating space and fixedly connected with the base, and the floating support and the positioning pin are adjacently arranged. According to the utility model, the C surface is used as the reference surface for processing the bearing hole, so that the error of reference transformation is reduced, the processing precision is improved, and the qualification rate is greatly improved.

Description

Clamp for machining bearing holes on planet carrier

Technical Field

The utility model relates to a clamp for machining bearing holes on a planet carrier, and belongs to the technical field of RV reducer planet carrier machining.

Background

The planet carrier is a component of the rv speed reducer, as shown in the figure, the traditional processing technology is that G is taken as an end surface reference on a machine tool, the bottom center Kong Cu is used for positioning the circle center, the surfaces of ABCDEF are processed at first, the surfaces are clamped at one time, and the position accuracy of the surfaces is higher; and then the equipment is replaced, the G surface is used as an end surface reference, and the E surface or the F surface is used as a circumference reference to process the D1 and the D2 conical bearing holes. Wherein ABCD is the mounting reference plane of the two main bearings, the axes of D1, D2 and AB are required to be parallel in use, and the fitting center is the central axis of AB. In the processing process, the precision requirement is higher, and if taper bearing holes on the long and short planet carriers are separately measured, the position degree is generally required to be within phi 0.005 mm. The flatness of the G surface is generally controlled within 0.005mm, but the flatness of 0.005mm can not meet the requirements, the height change of the supporting point can lead to the inclination of a workpiece, the position degrees of D1 and D2 can be seriously influenced, in addition, the reference is converted to a CD, the error is enlarged again, the qualification rate is too low, and the high processing precision is difficult to achieve.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: the clamp for machining the bearing holes of the planet carrier is provided, and the C surface is used as a reference surface for machining the bearing holes, so that errors of reference transformation are reduced, the machining precision is improved, and the qualification rate is greatly improved.

The technical problems to be solved by the utility model are realized by adopting the following technical scheme:

a fixture for machining a bearing hole in a planet carrier, comprising:

a base;

the support seat is fixed on the base, and the middle position is provided with an accommodating space for accommodating the planet carrier, and the edge of the accommodating space is in contact with the planet carrier and is a planet carrier contact surface;

the inclined plane positioning surfaces are arranged on the contact surface of the planet carrier and are symmetrically arranged;

the compressing assembly is used for compressing the end face of the planet carrier and is arranged on the supporting seat;

the positioning pin is positioned in the accommodating space and is fixedly connected with the base;

and the floating support is positioned in the accommodating space and fixedly connected with the base, and the floating support and the positioning pin are adjacently arranged.

In the device, the C surface is used as a reference surface to serve as a use reference, and the device is directly used for machining the bearing hole, so that the reference conversion error is reduced, the machining precision is improved, and the qualification rate is greatly improved.

Preferably, the pressing assembly includes: the pressing piece penetrates through the pressing plate and is fixedly connected with the supporting seat.

The extension of the planet carrier can be directly pressed onto the supporting seat in a manual or hydro-pneumatic mode, wherein the pressing piece is a bolt or a fastening pin.

The beneficial effects of the utility model are as follows:

the base is used for installing various accessories, the locating pin is used for locating the pin hole at the bottom of the planet carrier, and the locating pin is used for angular locating. The accommodating space of the supporting seat is provided with a notch, in order to increase the contact area with the C surface of the planet carrier as much as possible, the width of the notch is larger than the minimum width between the columns, the pressing plate is pressed on the upper surface of the planet carrier, the C datum plane can be directly used for machining the bearing hole, and the datum conversion error is eliminated. The two symmetrically arranged inclined plane locating surfaces on the contact surface of the planet carrier can locate the A reference excircle, the A reference excircle is also a reference, the center can be accurately located, if higher precision is needed, the E excircle can be detected by using a machine tool to determine the center, the E reference excircle and the A reference excircle are coaxial and are generally about phi 0.001mm, the error is small, and the contact surface of the upper surface of the supporting seat and the planet carrier C can be machined into a cutter by using the machine tool after the clamp is clamped, so that the flatness is ensured. The compressing assembly can be manual or hydraulic and pneumatic to compress the planet carrier, and a plurality of compressing assemblies can be arranged according to the requirement. The floating support is used for locking the floating support after the pressing plate presses the workpiece, so that the integral support rigidity of the workpiece is increased, and the workpiece is not easy to vibrate during boring. The C surface is used as a reference surface and is directly used for machining the bearing hole, so that the reference conversion error is reduced, the machining precision is improved, and the qualification rate is greatly improved.

Drawings

Fig. 1 is a cross-sectional view of a prior art planet carrier.

Fig. 2 is a schematic structural view of the present utility model.

Fig. 3 is a cross-sectional view of the fixture of the present utility model assembled with a planet carrier.

Fig. 4 is a side view of the planet carrier.

In the figure: 1. the device comprises a base, 2, a supporting seat, 21, a planet carrier contact surface, 3, an inclined plane positioning surface, 4, a pressing plate, 5, a pressing piece, 6, a positioning pin, 7, a floating support, 8 and a planet carrier.

Detailed Description

The utility model will be further described with reference to the following embodiments in order to make the technical means, the creation features, the achievement of the objects and the effects of the utility model easy to understand.

In the description of the present utility model, it should be understood that the terms "transverse", "longitudinal", "end", "edge", "side wall", "upper", "lower", "directly above", "surface", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "end", "head", "tail", etc. refer to the orientation or positional relationship based on the drawings, are merely for convenience of describing the technical solution of the present utility model and for simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Examples

As shown in fig. 1, in the conventional machining process, G is taken as an end surface reference on a machine tool, a bottom center Kong Cu is used for positioning a circle center, and a plurality of surfaces of ABCDEF are machined at first, wherein the surfaces are clamped at one time, and the position accuracy of the surfaces is higher; and then the equipment is replaced, the G surface is used as an end surface reference, and the E surface or the F surface is used as a circumference reference to process the D1 and the D2 conical bearing holes. Wherein ABCD is the mounting reference plane of the two main bearings, the axes of D1, D2 and AB are required to be parallel in use, and the fitting center is the central axis of AB. In the processing process, the precision requirement is higher, and if taper bearing holes on the long and short planet carriers are separately measured, the position degree is generally required to be within phi 0.005 mm. The flatness of the G surface is generally controlled within 0.005mm, but the flatness of 0.005mm can not meet the requirements, the height change of the supporting point can lead to the inclination of a workpiece, the position degrees of D1 and D2 can be seriously influenced, in addition, the reference is converted to a CD, the error is enlarged again, the qualification rate is too low, and the high processing precision is difficult to achieve. In order to solve the problems existing in the prior art, the implementation manner of the embodiment is as follows:

as shown in fig. 2 to 3, a jig for machining a bearing hole of a carrier includes: the device comprises a base 1, a supporting seat 2, an inclined plane positioning surface 3, a compression assembly, a positioning pin 6 and a floating support 7; wherein, the supporting seat 2 is fixed on the base 1, and the middle position is provided with an accommodating space for accommodating the planet carrier, and the edge of the accommodating space is contacted with the planet carrier to form a planet carrier contact surface 21; the bevel positioning surfaces 3 are embedded on the planet carrier contact surfaces 21, and are symmetrically arranged; the pressing components are used for pressing the end faces of the planet carrier, are arranged on the supporting seat 2 and are positioned at two ends of the planet carrier (two pressing components are symmetrically arranged in the embodiment); the positioning pin 6 is positioned in the accommodating space and is fixedly connected with the base 1; the floating support 7 is positioned in the accommodating space and fixedly connected with the base 1, and the floating support 7 is arranged adjacent to the positioning pin 6.

Wherein, compress tightly the subassembly and include: the pressing piece 5 and the pressing plate 4, and the pressing piece 5 penetrates through the pressing plate 4 to be fixedly connected with the supporting seat 2.

The base 1 is used for mounting various accessories, and the positioning pins 6 are used for positioning bottom pin holes of the planet carrier 8, and are used for angular positioning. The accommodating space of the supporting seat 2 is provided with a notch, in order to increase the contact area with the C surface of the planet carrier as much as possible, the width of the notch is larger than the minimum width between the posts (wherein the minimum width between the posts refers to the length of h as shown in fig. 4), the pressing plate 4 presses the upper surface of the planet carrier, and the C reference surface can be directly used for machining a bearing hole, so that the reference conversion error is eliminated. The two symmetrically arranged inclined plane locating surfaces 3 on the planet carrier contact surface 21 can locate the A reference excircle, the A reference excircle is also a reference, the center can be accurately located, if higher precision is required, the E excircle can be detected by using a machine tool to determine the center, and the coaxial line of the E reference excircle and the A reference excircle is generally about 0.001mm, so that the error is small, the contact surface between the upper surface of the supporting seat 2 and the planet carrier C can be machined by using the machine tool after the clamp is clamped, and the flatness is ensured. The compressing assembly can be manual or hydraulic and pneumatic to compress the planet carrier, and a plurality of compressing assemblies can be arranged according to the requirement. The floating support 7 is used for locking the floating support 7 after the pressing plate 4 presses the workpiece, so that the integral support rigidity of the workpiece is increased, and the workpiece is not easy to vibrate during boring.

The floating support in this embodiment is a standard component in the prior art, which is also called a self-positioning support, and refers to a support that can automatically adapt to the change of the workpiece positioning reference in the positioning process. The fixture for machining the bearing holes in the planet carrier is a common component.

In this embodiment, the "fixing", "mounting" and "setting" are all existing common fixed connection or mounting manners, for example: the detachable fixed connection is realized by bolts and pin shafts, and the non-detachable fixed connection is realized by welding, pasting, integrated forming and the like.

The specific using method is as follows:

1. and (3) installing a clamp, measuring the flatness of the supporting annular area on the upper surface of the supporting seat, and milling a supporting surface by using a machine tool if the flatness is larger than 0.002mm, so as to ensure the flatness.

2. And cleaning a certain planet carrier, lifting, putting into the supporting surface, inserting into the pin hole, and pushing forward to enable the outer circle to lean against the inclined surface.

3. And a pressing plate is pressed to lock the floating support.

4. And detecting the center of the workpiece and then processing.

The novel clamp can directly use the use standard for machining the bearing hole, reduces standard conversion error, improves machining precision and greatly improves qualification rate.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be appreciated by persons skilled in the art that the present utility model is not limited to the embodiments described above, but is capable of numerous variations and modifications without departing from the spirit and scope of the utility model as hereinafter claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (2)

1. A fixture for machining a bearing hole in a planet carrier, comprising:

a base;

the support seat is fixed on the base, and the middle position is provided with an accommodating space for accommodating the planet carrier, and the edge of the accommodating space is in contact with the planet carrier and is a planet carrier contact surface;

the inclined plane positioning surfaces are arranged on the contact surface of the planet carrier and are symmetrically arranged;

the plurality of compressing assemblies are used for compressing the end face of the planet carrier and are arranged on the supporting seat;

the positioning pin is positioned in the accommodating space and is fixedly connected with the base;

and the floating support is positioned in the accommodating space and fixedly connected with the base, and the floating support and the positioning pin are adjacently arranged.

2. The planet carrier tooling bearing bore fixture of claim 1, wherein said hold down assembly comprises: the pressing piece penetrates through the pressing plate and is fixedly connected with the supporting seat.