CN216463937U

CN216463937U - Crankshaft grinder center frame

Info

Publication number: CN216463937U
Application number: CN202122469206.7U
Authority: CN
Inventors: 陈俊桥; 陆涛
Original assignee: Neijiang Jinhong Crankshaft Co ltd
Current assignee: Neijiang Jinhong Crankshaft Co ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-05-10
Anticipated expiration: 2031-10-13

Abstract

The utility model relates to the technical field of center frames, and provides a crankshaft grinding machine center frame which comprises a base, an upper support arm and a lower support arm, wherein the upper support arm is used for abutting against a journal, the lower support arm is used for supporting the journal, and the upper support arm and the lower support arm are both hinged to the base; in addition, the center frame further comprises an upper pushing column and a first self-locking driving mechanism, one end of the upper pushing column abuts against the upper support arm, the other end of the upper pushing column penetrates through the base and then forms a mechanical self-locking structure with the first self-locking driving mechanism, and the first self-locking driving mechanism drives the upper pushing column to reciprocate. According to the utility model, the first self-locking driving mechanism matched with the upper pushing column is additionally arranged, so that a mechanical self-locking structure is formed between the upper pushing column and the first self-locking driving mechanism in the practical application process, the upper support arm cannot be reversely pushed even if the supported and fixed shaft neck is out of round, the grinding processing of other shaft necks is avoided being influenced, and the actual processing quality is further improved.

Description

Crankshaft grinder center frame

Technical Field

The utility model relates to the technical field of center frames, in particular to a center frame of a crankshaft grinding machine.

Background

The crankshaft is one of the important parts in the engine and is used for receiving the force transmitted by the connecting rod and converting the force into torque to drive other accessories on the engine to work. The crankshaft is generally composed of a front journal, a main journal, a connecting rod journal, a crank, a balance weight, and a rear journal.

The crankshaft is usually supported and pressed by a center frame during machining on a grinding machine, and the conventional center frame, as shown in fig. 1, includes a base, a lower arm hinged to the base and an upper arm driven by a cylinder to reciprocate in a horizontal direction, wherein the lower arm is used for supporting the journal from the bottom, and the upper arm is used for pressing the journal from the side, so as to play a role in supporting and fixing the journal by the cooperation of the lower arm and the upper arm.

However, in practical application, it is found that if the journal is out of round during the previous process, the elliptic part of the journal may push the upper arm reversely during the rotation grinding process of the crankshaft, so that the piston rod of the oil cylinder is contracted, the central position of the crankshaft is always in change, and the fine grinding process of the rest journals of the crankshaft is also out of round immediately, thereby affecting the processing quality.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a crankshaft grinding machine center frame, which enables a crankshaft not to reversely push a piston cylinder of an oil cylinder even if a supported journal is out of round in a rotary grinding process by additionally arranging a self-locking mechanism, so that the processing quality is improved to a certain extent.

The embodiment of the utility model is realized by the following technical scheme:

a crankshaft grinding machine center frame comprises a base, an upper support arm and a lower support arm, wherein the upper support arm is used for abutting against a journal, the lower support arm is used for supporting the journal, and the upper support arm and the lower support arm are both arranged on the base in a hinged mode;

the automatic lifting device is characterized by further comprising an upper pushing column and a first self-locking driving mechanism, one end of the upper pushing column abuts against the upper supporting arm, the other end of the upper pushing column penetrates through the base and then forms a mechanical self-locking structure with the first self-locking driving mechanism, and the first self-locking driving mechanism drives the upper pushing column to reciprocate.

Optionally, first auto-lock actuating mechanism includes box, linear drive device and cunning locates wedge in the box, it keeps away from to go up the pushing post the one end of going up the support arm passes behind the box with the inclined plane of wedge contacts in order to form mechanical auto-lock structure, linear drive device is used for the drive the wedge is in reciprocating motion is in the box with the top pushing post.

Further, the outer wall cover of the upper pushing column is provided with a first buffer spring, the first buffer spring is located inside the base, one end of the first buffer spring is connected with the outer wall of the upper pushing column, and the other end of the first buffer spring is connected with the inner wall of the base.

Optionally, the device further comprises a lower pushing column and a second self-locking driving mechanism, one end of the lower pushing column abuts against the lower support arm, the other end of the lower pushing column penetrates through the base and then forms a mechanical self-locking mechanism with the second self-locking driving mechanism, and the second self-locking driving mechanism drives the lower pushing column to reciprocate.

Further, the structure of the second self-locking driving mechanism is the same as that of the first self-locking driving mechanism.

Further, the outer wall cover of pushing away the post down is equipped with second buffer spring, second buffer spring is located inside the base, second buffer spring one end and the outer wall connection of pushing away the post down, the second buffer spring other end with the inner wall connection of base.

Optionally, the base is further provided with a detachable ground hinge seat and a lower hinge seat, the upper support arm is hinged to the base through the upper hinge seat, and the lower support arm is hinged to the base through the lower hinge seat.

The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects:

the utility model has reasonable design, and a mechanical self-locking structure is formed between the upper pushing column and the first self-locking driving mechanism by additionally arranging the first self-locking driving mechanism matched with the upper pushing column in the practical application process, so that the upper support arm cannot be reversely pushed even if the supported and fixed shaft neck is out of round, the grinding processing of other shaft necks is avoided being influenced, and the actual processing quality is further improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a conventional center frame according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a center frame according to an embodiment of the present invention;

fig. 3 is a top view of a first self-locking driving structure according to an embodiment of the present invention.

Icon: 1-base, 2-upper support arm, 3-lower support arm, 4-oil cylinder, 5-upper hinged seat, 6-lower hinged seat, 7-upper push column, 8-first self-locking driving mechanism, 801-box body, 802-linear driving device, 803-wedge block, 9-first buffer spring, 10-lower push column, 11-second self-locking driving mechanism, 12-second buffer spring and 100-journal.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of this application is used, the description is merely for convenience and simplicity of description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1, the conventional steady rest includes a base 1, a lower arm 3 hinged to the base 1, and an upper arm 2 driven by a cylinder 4 to reciprocate in a horizontal direction, wherein the lower arm 3 is used to support a journal 100 from the bottom, and the upper arm 2 is used to press the journal 100 from the side, so as to play a role of assisting in supporting the fixed journal 100 by the cooperation of the lower arm 3 and the upper arm 2.

Considering that the oil cylinder 4 is directly adopted to drive the upper support arm 2 to move to press against the side surface of the journal 100 in the prior art, when the supported and fixed journal 100 is out of round, the elliptical part of the journal 100 reversely pushes the upper support arm 2 so as to contract the piston rod of the oil cylinder 4, so that the central position of the crankshaft is always in change, and the actual processing quality is affected.

Therefore, referring to fig. 2, the present embodiment provides a center rest of a crankshaft grinding machine, which includes a base 1, an upper arm 2, a lower arm 3, an upper hinge seat 5 and a lower hinge seat 6. Wherein, this base 1 is L type structure, goes up articulated seat 5 detachably and installs in the bottom of base 1, and articulated seat 6 detachably installs at the lateral wall of base 1 down, goes up 2 one ends of support arm and sets up on base 1 through last articulated seat 5 is articulated, and lower support arm 3 sets up on base 1 through articulated seat 6 is articulated down, and goes up crisscross setting between support arm 2 and the lower support arm 3 to avoid taking place to interfere between the two. In the actual use process, the pressing block arranged at the end of the upper arm 2 far away from the upper hinge seat 5 presses the shaft neck 100 from the side of the shaft neck 100, and the supporting block arranged at the end of the lower arm 3 far away from the lower hinge seat 6 supports the shaft neck 100 from the lower part of the shaft neck 100, so as to play a role in assisting in supporting and fixing the shaft neck 100.

Meanwhile, with continued reference to fig. 2, the center frame of this embodiment further includes an upward pushing column 7 and a first self-locking driving mechanism 8, one end of the upward pushing column 7 abuts against the upper support arm 2, the other end of the upward pushing column 7 penetrates through the base 1 and then forms a mechanical self-locking structure with the first self-locking driving mechanism 8, and the first self-locking driving mechanism 8 drives the upward pushing column 7 to reciprocate.

Specifically, referring to fig. 3, the first self-locking driving mechanism 8 includes a box 801, a linear driving device 802, and a wedge 803 slidably disposed in the box 801 and having at least one inclined surface, preferably, the wedge 803 is horizontally slidably disposed in the box 801; meanwhile, one end of the push-up column 7, which is far away from the upper support arm 2, penetrates through the box body 801 and then forms an inclined surface contact with the inclined surface of the wedge block 803, and the inclined angle of the inclined surface is smaller than or equal to the self-locking angle (friction angle) of the inclined surface, so that a mechanical self-locking structure is formed between the push-up column 7 and the wedge block 803. The self-locking angle can be calculated according to common knowledge, and is not described in detail herein. The linear driving device 802 is used to drive the wedge 803 to reciprocate horizontally in the box 801, and based on the inclined plane transmission principle, the upper pushing column 7 can be pushed by the wedge 803, so that the upper supporting arm 2 can be pushed by the upper pushing column 7 to rotate around the hinge point of the upper supporting arm 2, and the pressing block of the upper supporting arm 2 presses the journal 100 from the side of the journal 100. It can be understood that the linear driving device 802 of the present embodiment may be a conventional driving device such as a cylinder, an air cylinder, etc., and in order to further improve the reliability of the center frame during use, the linear driving device 802 is also a cylinder with a more stable and reliable operation process.

With such an arrangement, in the actual use process, when the linear driving device 802 of the first self-locking driving mechanism 8 drives the wedge 803 to move, the wedge 803 pushes the push-up post 7 to push the upper support arm 2 to press against the side surface of the journal 100 by using the push-up post 7, and at this time, because a mechanical self-locking structure is formed between the push-up post 7 and the wedge 803, the wedge 803 can move only when the thrust acting on the wedge 803 is large enough, and even if the journal 100 supported and fixed is out of round, the force acting on the upper support arm 2 by the journal 100 in the rotation process is relatively small, so that the upper support arm 2 cannot be pushed reversely, so that the central position of the journal 100 cannot be changed in the grinding process, and the actual processing quality can be improved.

In addition, with reference to fig. 2, the outer wall of the push-up post 7 is sleeved with a first buffer spring 9, the first buffer spring 9 is located in a first reset groove formed in the base 1, one end of the first buffer spring 9 is connected to the outer wall of the push-up post 7, and the other end of the first buffer spring 9 is connected to the inner wall of the first reset groove formed in the base 1. The first buffer spring 9 can play a certain buffering role, so that the stability of the push-up column 7 in the movement process is improved; meanwhile, when the linear driving device 802 of the first self-locking driving mechanism 8 drives the wedge 803 to move in the opposite direction, the push-up column 7 can move in the direction away from the upper support arm 2 under the action of the first buffer spring 9, so that the automatic reset of the push-up column 7 is realized.

Further, in order to further improve the reliability of the center frame, with continued reference to fig. 2, the center frame further includes a lower push column 10 and a second self-locking driving mechanism 11, one end of the lower push column 10 abuts against the lower arm 3, the other end of the lower push column 10 penetrates through the base 1 and then forms a mechanical self-locking mechanism with the second self-locking driving mechanism 11, and the second self-locking driving mechanism 11 drives the lower push column 10 to reciprocate. The structure and action principle of the second self-locking driving mechanism 11 of the present embodiment are the same as those of the first self-locking driving mechanism 8, and the self-locking structure is also adopted to prevent the journal 100 from reversely pushing the lower support arm 3 during the machining process, so as to avoid affecting the actual machining quality.

Meanwhile, with reference to fig. 2, the outer wall of the lower push pillar 10 is also sleeved with a second buffer spring 12, the second buffer spring 12 is located in a second reset groove formed in the base 1, one end of the second buffer spring 12 is connected to the outer wall of the lower push pillar 10, and the other end of the second buffer spring 12 is connected to the inner wall of the second reset groove formed in the base 1. The second buffer spring 12 can also play a certain buffering role, so that the stability of the push-down column 10 in the movement process is improved; meanwhile, when the linear driving device 802 of the second self-locking driving mechanism 11 drives the wedge 803 to move in the opposite direction, the push-down column 10 can move in the direction away from the lower arm 3 under the action of the second buffer spring 12, so that the automatic reset of the push-down column 10 is realized.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The crankshaft grinding machine center frame is characterized by comprising a base, an upper support arm and a lower support arm, wherein the upper support arm is used for abutting against a journal, the lower support arm is used for supporting the journal, and the upper support arm and the lower support arm are hinged to the base;

2. The center frame of the crankshaft grinding machine as claimed in claim 1, wherein the first self-locking driving mechanism includes a box, a linear driving device and a wedge block slidably disposed in the box, one end of the upward pushing column, which is far away from the upper support arm, passes through the box and then contacts with an inclined surface of the wedge block to form a mechanical self-locking structure, and the linear driving device is used for driving the wedge block to reciprocate in the box to push the upward pushing column.

3. The center frame of the crankshaft grinding machine as claimed in claim 2, wherein the outer wall of the push-up column is sleeved with a first buffer spring, the first buffer spring is located inside the base, one end of the first buffer spring is connected with the outer wall of the push-up column, and the other end of the first buffer spring is connected with the inner wall of the base.

4. The center frame of the crankshaft grinding machine as claimed in claim 1, further comprising a lower pushing column and a second self-locking driving mechanism, wherein one end of the lower pushing column abuts against the lower support arm, the other end of the lower pushing column penetrates through the base and then forms a mechanical self-locking mechanism with the second self-locking driving mechanism, and the second self-locking driving mechanism drives the lower pushing column to reciprocate.

5. The crankshaft grinding machine center frame of claim 4, wherein the second self-locking drive mechanism is identical in structure to the first self-locking drive mechanism.

6. The center frame of the crankshaft grinding machine as claimed in claim 4, wherein a second buffer spring is sleeved on the outer wall of the downward pushing column, the second buffer spring is located inside the base, one end of the second buffer spring is connected with the outer wall of the downward pushing column, and the other end of the second buffer spring is connected with the inner wall of the base.

7. The crankshaft grinding machine center rest of claim 1, wherein the base is further provided with a detachable ground hinge seat and a lower hinge seat, the upper arm is hinged to the base through the upper hinge seat, and the lower arm is hinged to the base through the lower hinge seat.