CN219562170U - Clamp for planet carrier turning and boring - Google Patents

Abstract

The utility model discloses a clamp for planet carrier turning and boring, which comprises a bottom plate, a chuck base, a clamping head and a positioning seat metal, wherein the chuck base is fixed on the bottom plate, the chuck base is annular, the clamping head is provided with three circumferences distributed on the chuck base, the positioning seat metal is provided with three circumferences distributed on the top surface of the chuck base, the back side of the clamping head and the chuck base are provided with inclined planes which are mutually abutted, the chuck base is provided with a driving telescopic cylinder, and the telescopic end of the driving telescopic cylinder is connected with the clamping head and used for driving the clamping head to move inwards and downwards or upwards and outwards. The utility model can rapidly and stably clamp the long shaft end of the planet carrier, avoid clamping runout and is beneficial to improving the machining precision.

Description

Clamp for planet carrier turning and boring

Technical Field

The utility model relates to a machining clamp, in particular to a clamp for turning and boring a planet carrier.

Background

The requirements on the position degree of a main shaft hole and a planet wheel shaft hole on the planet carrier of the coal mining machine are high, if a plurality of turning and boring steps are respectively carried out by adopting multi-machine tool processing, the total accumulated error tends to be larger due to the repeated clamping and errors of the machine tools, and the product precision is not beneficial to improvement. And a plurality of processing steps are completed as much as possible through one-time clamping on a single machine tool, so that errors caused by clamping can be reduced, and the precision is improved.

The ring frame of the planet carrier is close to the short shaft end, so that if one end of the long shaft of the planet carrier is clamped firstly, the short shaft end and the ring frame are machined at one time, and then the long shaft end is machined by turning the position, the error can be reduced to the greatest extent. The common three-jaw chuck structure only adopts a radial force clamp mode, but because a certain inclination exists after the peripheral surface of the long shaft end is roughly machined, the jaw surface is difficult to ensure complete contact with the workpiece surface, for example, poor contact can cause axial displacement of the workpiece in the clamping process, the positioning plane is in poor contact with a tool pivot, the workpiece is easy to loosen or fly due to centrifugal force caused by the high-speed rotation of the positioning plane and the cutting force of the tool on the workpiece during machining, and the machining precision is influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a clamp for turning and boring a planet carrier, which solves the problems of stability and clamping precision of clamping a long shaft end of the planet carrier.

The technical scheme of the utility model is as follows: the utility model provides a planet carrier boring anchor clamps for processing, includes bottom plate, chuck base, gripping head and positioning seat gold, the chuck base is fixed in on the bottom plate, the chuck base is cyclic annular, the gripping head be equipped with three distribute in the circumference of chuck base, positioning seat gold be equipped with three distribute in the circumference of the top surface of chuck base, the dorsal part of gripping head with the chuck base is equipped with the inclined plane that leans on each other, the chuck base is equipped with the flexible jar of drive, the flexible end of the flexible jar of drive with the gripping head is connected and is used for the drive the gripping head inwards and moves down or upwards and outwards moves.

Further, the driving telescopic cylinder is arranged vertically, the telescopic end of the driving telescopic cylinder is connected with the clamping head through a pin, and the pin hole on the clamping head is a long hole. The power assembly is arranged in the vertical direction, the moving direction of the clamping head is changed by means of the inclined plane on the back side of the clamping head, and the clamping problem of the clamping head is reduced.

Further, a plurality of notches are formed between the chuck base and the bottom plate, the notches are formed in the middle of the clamp to be outward Zhou Daotong, and the bottoms of the notches on the bottom plate are high and low. The metal chip falling into the clamp during processing can be conveniently guided out of the notch through the notch, so that the metal chip is convenient to clean.

Further, a sliding groove is formed in the surface of the chuck base, the positioning seat is slidably arranged on the surface of the chuck base, and a detachable clamping block is arranged at the head end of the clamping head. The positioning seat gold position is moved through the chute, and clamping blocks with different lengths are replaced, so that the support positioning device can be suitable for supporting and positioning workpieces with different sizes.

Further, a detachable guide ring is arranged on the inner ring of the chuck base, and an extension groove which is in butt joint with the sliding groove is formed in the guide ring. The workpiece with different sizes can be guided to be initially centered by disassembling and replacing different guide rings, and meanwhile, the collision risk of the workpiece and the clamp can be reduced.

Further, be equipped with a plurality of balance components on the bottom plate, the balance component includes the balance cylinder, be equipped with the balancing piece in the balance cylinder, the balance cylinder is equipped with but the switching top cap.

Compared with the prior art, the utility model has the advantages that:

the mechanism similar to a three-jaw chuck is used for radially clamping by adopting three clamping heads, and the self-centering function is realized, so that the workpiece does not need to be aligned, and the clamping time can be saved; during clamping, the clamping head is pressed downwards obliquely, and has axial acting force when generating radial clamping force on the workpiece, so that the end face of the ring frame can be tightly attached to the positioning seat, and the precision is ensured. Through the removal of positioning seat gold and the change of the clamp splice of gripping head, can adapt to the work piece of multiple equidimension, the dynamic balance state after the balanced subassembly setting can conveniently adjust the centre gripping work piece reduces centrifugal force, improves machining precision.

Drawings

Fig. 1 is a schematic structural view of a jig for turning and boring a carrier according to an embodiment.

Fig. 2 is a schematic diagram of a base plate structure.

Fig. 3 is a schematic view of the chuck base structure (shown in upper section).

Fig. 4 is a schematic diagram of a connection structure between a clamping head and a hydraulic cylinder.

Fig. 5 is a schematic view of the structure of the carrier clamped by the jig for boring the carrier.

Detailed Description

The utility model is further illustrated, but is not limited, by the following examples.

Referring to fig. 1, a fixture for turning and boring a planet carrier according to this embodiment mainly includes a base plate 1, a chuck base 2, a clamping head 3, and a positioning seat 4, where the base plate 1 is used for fixing with a machine tool. The chuck base 2 is fixedly connected to the bottom plate 1 through bolts, and the top of the chuck base 2 is used for installing a clamping head and a positioning seat. The bottom surface of the chuck base 2 and the bottom plate 1 are provided with notches 5 along the radial direction of the chuck base 2, and as shown in fig. 2, the notches 5 on the bottom plate 1 are inclined ports with high central positions and low edge positions. Notch 5 is turned on the periphery by the centre of anchor clamps and is formed clear bits passageway, and the metal fillings that fall into inside anchor clamps during the processing can conveniently follow notch 5 and lead out, the clearance of being convenient for.

As shown in fig. 3, the chuck base 2 has a ring-shaped multi-layer structure, and the bottom layer 201 of the chuck base 2 is directly connected with the base plate 1, and three hydraulic cylinders 6 are mounted as driving telescopic cylinders for driving the clamping heads 3. The hydraulic cylinder 6 is vertically arranged, that is, when the hydraulic cylinder 6 acts, the telescopic direction of the hydraulic cylinder 6 is longitudinal and is vertical to the top surface of the chuck base 2. The upper layer 202 of the chuck base 2 is fixedly connected with the bottom layer 201, three clamping holes 7 are formed in the upper layer 202, the positions of the clamping holes 7 are opposite to the positions of the hydraulic cylinders 6, and the clamping heads 3 are arranged in the clamping holes 7. In order to convert the vertical movement of the hydraulic cylinder 6 into the dual movement of the clamping head 3 in the vertical direction and the horizontal direction, the outer side 701 of the clamping hole 7, that is, the side, away from the center of the chuck base 2, of the clamping hole 7 is set to be a bevel, the back side of the clamping head 3 is a corresponding bevel, and when the hydraulic cylinder 6 pulls the clamping head 3 to move downwards, the clamping head 3 is pushed by the bevel to move radially (horizontally) at the same time, so that the clamping effect is achieved. In this embodiment, in order to better guide the clamping head 3 radially, two side walls of the clamping hole 7 are provided with oblique ribs 702, the extending direction of the ribs 702 is parallel to the oblique direction of the oblique plane, and the section of the clamping hole 7 is in an i shape.

The shape of the clamping head 3 is matched with the clamping hole 7. The end of the clamping head 3 is provided with a connecting table for connecting the clamping blocks 8 contacted with the workpiece, the clamping blocks 8 are connected with the connecting table by bolts, and the clamping blocks 8 can be detached and replaced, when the workpiece with different sizes is clamped, the clamping blocks 8 with different lengths are replaced to obtain different clamping sizes (2 clamping heads 3 are provided with different clamping blocks 8 in the figure, and the other clamping head 3 is not provided with the clamping blocks 8). Referring to fig. 4, in order to ensure that the clamping head 3 can move obliquely, the clamping head 3 is connected with the hydraulic cylinder 6 by adopting a movable pin manner. Specifically, a connecting port is formed at the bottom of the clamping head 3, long holes 301 are formed at two sides of the clamping head 3, the long holes 301 are longer in the horizontal direction and shorter in the vertical direction, and the long holes 301 are communicated with the connecting port. The telescopic end of the hydraulic cylinder 6 stretches into the connecting port and has a certain gap with the connecting port in the radial direction of the chuck base 2, and the pin shaft 9 penetrates into the long hole 301 and the telescopic end of the hydraulic cylinder 6 to complete the connection of the clamping head 3 and the telescopic end of the hydraulic cylinder 6. When the telescopic end of the hydraulic cylinder 6 stretches up and down, the pin 9 can horizontally move in the long hole 301, so that the clamping head 3 can obliquely move.

The surface of the upper layer 202 of the chuck base 2 is provided with three groups of radial T-shaped sliding grooves 10, three positioning seat gold 4 (only two positioning seat gold 4 with different shapes are shown in the figure) are matched with the T-shaped sliding grooves 10 to be slidably arranged on the surface of the chuck base 2, meanwhile, the inner ring of the chuck base 2 is provided with a detachable guide ring 11, the guide ring 11 is connected with the upper layer 202 of the chuck base 2 through screws, and an extension groove 15 which is in butt joint with the sliding grooves 10 is formed in the guide ring 11. The positioning seat gold 4 can be adjusted to the position of the chuck base 2 according to the requirement, so that the support of the ring frame end faces of the planet frame workpieces with different sizes is met. The guide ring 11 can guide workpieces of different sizes to perform preliminary centering, and meanwhile collision risk of the workpieces and the clamp can be reduced.

As a preferred embodiment, the base plate 1 of the present embodiment is further provided with three balancing assemblies and a plurality of hanging rings 12, and the hanging rings 12 can facilitate the whole clamping by means of a lifting appliance. The balance assembly comprises a balance cylinder 13, the balance cylinder 13 is fixed on the bottom plate 1, the balance cylinder 13 can be internally provided with different numbers of balance weights according to the requirement to change the local weight, the top of the balance cylinder 13 is connected with an openable top cover 14 by bolts for adjusting the number of the balance weights, so that the whole fixture has better dynamic balance after clamping workpieces, and the influence of centrifugal force on the machining precision is reduced.

As shown in fig. 5, when the carrier work is required to be clamped, the positioning seat gold 4 is slid so that the carrier work can support the ring frame end face of the carrier a, and the position of the positioning seat gold 4 is fixed. After the clamping blocks 8 with proper lengths are selected to be installed on the clamping heads 3, long shaft ends of the planet carrier A are hung into middle through holes of the annular chuck base 2, and the planet carrier A is supported by the positioning seat gold 4. Then the hydraulic cylinder 6 is started to shrink downwards, the clamping head 3 is driven by the hydraulic cylinder 6 to move downwards and inwards to clamp the long shaft end, and as the clamping head 3 moves downwards while generating plane movement, a certain axial effect is achieved when clamping the long shaft end of the planet carrier A, so that the close contact between the ring frame end surface of the planet carrier A and the top surface of the positioning seat gold 4 can be ensured, and the gap between the ring frame end surface and the positioning seat gold 4 caused by workpiece jumping during clamping is avoided, thereby providing guarantee for high-precision machining.

Claims (6)

1. The utility model provides a planet carrier boring anchor clamps for processing, its characterized in that includes bottom plate, chuck base, gripping head and positioning seat gold, the chuck base is fixed in on the bottom plate, the chuck base is cyclic annular, the gripping head be equipped with three distribute in the circumference of chuck base, positioning seat gold be equipped with three distribute in the circumference of the top surface of chuck base, the dorsal part of gripping head with the chuck base is equipped with the inclined plane that leans on each other, the chuck base is equipped with the flexible jar of drive, the flexible end of the flexible jar of drive with the gripping head is connected and is used for the drive the inwards and down remove or upwards and outwards remove of gripping head.

2. The jig for boring a planet carrier according to claim 1, wherein the driving telescopic cylinder is arranged vertically, a telescopic end of the driving telescopic cylinder is connected with the clamping head in a pin manner, and a pin hole on the clamping head is a long hole.

3. The fixture for planet carrier turning and boring according to claim 1, wherein a plurality of notches are arranged between the chuck base and the bottom plate, the notches are Zhou Daotong from the middle of the fixture to the outside, and the bottom surfaces of the notches on the bottom plate are high in the inside and low in the outside.

4. The fixture for turning and boring the planet carrier according to claim 1, wherein a chute is formed in the surface of the chuck base, the positioning seat is slidably disposed on the surface of the chuck base, and a detachable clamping block is arranged at the head end of the clamping head.

5. The fixture for turning and boring the planet carrier according to claim 4, wherein the inner ring of the chuck base is provided with a detachable guide ring, and the guide ring is provided with an elongated slot which is in butt joint with the chute and extends.

6. The fixture for turning and boring the planet carrier according to claim 1, wherein a plurality of balance components are arranged on the bottom plate, the balance components comprise a balance cylinder, a balance weight is arranged in the balance cylinder, and an openable top cover is arranged in the balance cylinder.