CN219444216U - Automatic centering center frame device of numerical control machine tool - Google Patents

Abstract

The utility model relates to the technical field of machining equipment, in particular to an automatic centering center frame device of a numerical control machine tool. Including the casing, the middle part of casing one end is provided with telescoping device, the both sides of the casing other end are provided with the joint axle, and the middle part and the joint axle rotation of rocking arm are connected, the one end of rocking arm rotates and is connected with the leading wheel, the other end of rocking arm rotates and is connected with the riding wheel, sliding connection has the translation cam that promotes and stimulate by telescoping device in the casing, the both sides of translation cam are provided with the guide surface, the one end that keeps away from of translation cam rotates and is connected with other riding wheel, and the one end and the rocking arm of linkage board rotate to be connected and this end is coaxial with the leading wheel, the other end of linkage board is provided with the round pin, the both sides of translation cam all are provided with the guide way that is used for holding the round pin and can stimulate the rocking arm and reset when translation cam retreats. The utility model has higher reliability and compact structure.

Description

Automatic centering center frame device of numerical control machine tool

Technical Field

The utility model relates to the technical field of machining equipment, in particular to an automatic centering center frame device of a numerical control machine tool.

Background

The center frame is an auxiliary supporting device used in the turning or grinding process of slender shaft parts, and in order to improve clamping efficiency, an automatic centering center frame is generally adopted by a numerical control machine tool. The patent with application number 201810262963.7 discloses an automatic centering center frame, when a translation cam moves forwards, an upper pressing rod assembly and a lower pressing rod assembly can be pushed to rotate, a riding wheel on the automatic centering center frame can be pressed on the surface of a workpiece to be processed to support the workpiece, the centers of equilateral triangles taking the translation cam and three riding wheels on the upper pressing rod assembly and the lower pressing rod assembly as vertexes are kept unchanged, but the upper pressing rod assembly and the lower pressing rod assembly are reset by adopting springs, the springs have certain lengths, the tension of the springs is in direct proportion to the length of the springs, the reset tension of the upper pressing rod assembly and the lower pressing rod assembly under different angles is different, and especially when the spring is stretched less, the reset tension is smaller, if the upper pressing rod and the lower pressing rod are rotated more astringently, the reset is blocked, and the reliability is lower.

Disclosure of Invention

The utility model aims to solve the technical problems and provides an automatic centering center frame device of a numerical control machine tool.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides an automatic centering center frame device of digit control machine tool, includes the casing, the middle part of casing one end is provided with telescoping device, the both sides of the casing other end are provided with the joint axle, and the middle part and the joint axle rotation of rocking arm are connected, the one end rotation of rocking arm is connected with the leading wheel, the other end rotation of rocking arm is connected with the riding wheel, sliding connection has the translation cam that promotes and stimulate by telescoping device in the casing, the both sides of translation cam are provided with the guide surface, the one end rotation that telescoping device was kept away from to the translation cam is connected with other riding wheel, and the one end and the rocking arm of linkage board rotate to be connected and this end is coaxial with the leading wheel, the other end of linkage board is provided with the round pin post, the both sides of translation cam all are provided with the guide way that is used for holding the round pin post and can stimulate the rocking arm and reset when translation cam retreats.

According to the technical scheme, an axle is arranged at one end of the rotating arm, the guide wheel is sleeved outside the axle, and the linkage plate is rotationally connected with the axle.

Further optimizing this technical scheme, the round pin post rotates with the linkage board to be connected.

Further optimize this technical scheme, translation cam keeps away from the one end of telescoping device and is provided with the jack-up post, the riding wheel rotates with the top of jack-up post to be connected.

Further optimizing this technical scheme, telescoping device is the pneumatic cylinder.

Compared with the prior art, the utility model has the following advantages: one end of each rotating arm is rotationally connected with a linkage plate, the other end of the linkage plate is provided with a pin, guide grooves are formed in two sides of each translation cam, and the pin is located in each guide groove, so that when the translation cams retreat, the two rotating arms can correspondingly open outwards, the reliability is high, and the structure is compact.

Drawings

Fig. 1 is a schematic structural view of an automatic centering center frame device of a numerical control machine tool.

In the figure: 1. a housing; 2. a telescoping device; 3. a translation cam; 31. a guide surface; 32. a guide groove; 33. a top column; 4. a joint shaft; 5. a rotating arm; 51. a guide wheel; 52. a linkage plate; 53. a wheel axle; 54. and (5) a pin.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

The specific embodiment is as follows: referring to fig. 1, an automatic centering center frame device of a numerically-controlled machine tool comprises a housing 1, a telescopic device 2 is arranged in the middle of one end of the housing 1, a joint shaft 4 is arranged on two sides of the other end of the housing 1, the middle of a rotating arm 5 is rotationally connected with the joint shaft 4, one end of the rotating arm 5 is rotationally connected with a guide wheel 51, the other end of the rotating arm 5 is rotationally connected with a riding wheel, a translation cam 3 pushed and pulled by the telescopic device 2 is slidably connected in the housing 1, guide surfaces 31 are arranged on two sides of the translation cam 3, one end of the translation cam 3 far away from the telescopic device 2 is rotationally connected with another riding wheel, one end of a linkage plate 52 is rotationally connected with the rotating arm 5 and is coaxial with the guide wheel 51, a pin 54 is arranged on the other end of the linkage plate 52, and guide grooves 32 for accommodating the pin 54 and capable of pulling the rotating arm 5 to reset when the translation cam 3 retreats are arranged on two sides of the translation cam 3. The resetting is that when the translation cam 3 retreats, the two swivel arms 5 can correspondingly open outwards.

Specifically, one end of the rotating arm 5 is provided with an axle 53, the guide wheel 51 is sleeved outside the axle 53, and the linkage plate 52 is rotatably connected with the axle 53. Let d be the distance between the side of the guide groove 32 near the guide surface 31 and the guide surface 31, d should be unchanged, i.e. the guide groove 32 is equidistant from the guide surface 31, let r1 be the radius of the guide wheel 51, r2 be the radius of the pin 54, then the distance between the axis of the axle 53 and the axis of the pin 54 be equal to or slightly greater than the sum of d+r1+r2, so that the guide wheel 51 can be always attached to the guide surface 31 or a slight gap exists between the two, thereby driving the corresponding outward opening of the rotating arm 5 when the translational cam 3 is retracted.

Further, the pin 54 is rotatably connected to the linkage plate 52, so that friction between the pin 54 and the guide groove 32 can be reduced.

Further, the translation cam 3 is provided with the jack-up post 33 far away from the one end of telescoping device 2, the riding wheel rotates with the top of jack-up post 33 and is connected, is provided with corresponding sliding tray on the casing 1 this moment, and jack-up post 33 is located the sliding tray, can play the guide effect.

Preferably, the telescopic device 2 is a hydraulic cylinder, and has a small volume.

The foregoing embodiments are not intended to limit the present utility model, but while the present utility model has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, and any modifications, equivalents, improvements or changes that fall within the spirit and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims (5)

1. The utility model provides an automatic centering center frame device of digit control machine tool, includes casing (1), the middle part of casing (1) one end is provided with telescoping device (2), the both sides of casing (1) other end are provided with articulated shaft (4), and the middle part and the articulated shaft (4) of rocking arm (5) rotate to be connected with leading wheel (51), the other end rotation of rocking arm (5) is connected with the riding wheel, sliding connection has translation cam (3) by telescoping device (2) promotion and pulling in casing (1), the both sides of translation cam (3) are provided with guide surface (31), the one end rotation that telescoping device (2) was kept away from to translation cam (3) is connected with other riding wheel, its characterized in that: one end of a linkage plate (52) is rotationally connected with the rotating arm (5) and is coaxial with the guide wheel (51), a pin (54) is arranged at the other end of the linkage plate (52), and guide grooves (32) which are used for accommodating the pin (54) and can pull the rotating arm (5) to reset when the translation cam (3) retreats are formed in two sides of the translation cam (3).

2. The automatic centering center frame device of a numerical control machine according to claim 1, wherein: one end of the rotating arm (5) is provided with a wheel shaft (53), the guide wheel (51) is sleeved outside the wheel shaft (53), and the linkage plate (52) is rotationally connected with the wheel shaft (53).

3. The automatic centering center frame device of a numerical control machine according to claim 1, wherein: the pin (54) is rotatably connected with the linkage plate (52).

4. The automatic centering center frame device of a numerical control machine according to claim 1, wherein: and a jacking column (33) is arranged at one end, far away from the telescopic device (2), of the translation cam (3), and the riding wheel is rotationally connected with the top end of the jacking column (33).

5. An automatic centering center frame device of a numerical control machine according to any one of claims 1-4, characterized in that: the telescopic device (2) is a hydraulic cylinder.