Wedge surface locking mechanism

Abstract

The utility model relates to the technical field of machine tool equipment, in particular to a wedge surface locking mechanism which comprises a shell, a driving wedge block, a driven wedge block and an oil cylinder, a sliding way is arranged in the shell, a piston and an elastic piece are arranged in the oil cylinder, one end of the piston is connected with the driving wedge block, and the other end of the piston is connected with the elastic piece used for pressing. The driving wedge block is driven by the piston to transversely move in the sliding way, and the driven wedge block and the driving wedge block are matched to move up and down in the sliding way so as to abut against or loosen a moving part of a machine tool. The locking mechanism is low in manufacturing cost, simple in structure, suitable for moving assemblies on various machine tools, convenient to install and use, and more reliable and safer due to the fact that wedge face locking is adopted.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe equipment technical field, concretely is a wedge surface locking mechanism. BACKGROUND

[0002] Locking mechanisms are often designed between the moving parts and the base of a lathe.

[0003] For example, between the tailstock and the bed of a lathe, when turning work is being performed, the tailstock and the bed are in a locked state, and when the tailstock needs to be moved, the tailstock and the bed are in an unlocked state. The tightness of the tailstock and the bed of the lathe currently needs to be manually operated, that is, a wrench is manually used to screw a locking screw, the locking screw controls the lifting of a locking plate, and the locking and unlocking of the tailstock and the bed are achieved. The disadvantage is that the operation is complex, and there is no electrical interlocking between the tightness action and other actions of the tailstock.

[0004] For another example, a milling power head of a turning-milling combined machining center has lifting motion perpendicular to the horizontal plane. When the milling power head is lifted to a machining position, a firm and reliable locking mechanism is needed between the power head mounting slide plate and the column to enable the power head to stably stop at the height. The current traditional structure is a hydraulic cylinder locking mechanism, and the disadvantage is that the oil supply cavity of the hydraulic cylinder is small in diameter, the hydraulic station needs to have a very high pressure, and the hydraulic pipeline is long, which will have a large pressure loss and poor locking stability. SUMMARY

[0005] To solve the above problems, the utility model provides a wedge surface locking mechanism, which is simple in structure, convenient to use, safe and reliable in wedge surface locking, and the technical scheme adopted by the utility model is as follows:

[0006] A wedge surface locking mechanism, comprising a shell, a driving wedge block, a driven wedge block and an oil cylinder, wherein the shell is provided with a slide in the shell, the oil cylinder is provided with a piston and an elastic member in the oil cylinder, one end of the piston is connected to the driving wedge block, the other end of the piston is connected to the elastic member for compression, the driving wedge block is driven by the piston to move transversely in the slide, and the driven wedge block is matched with the driving wedge block to move up and down in the slide to tightly press or loosen the moving parts of the lathe.

[0007] The wedge surface locking mechanism, wherein the wedge surface angle of the driven wedge block and the driving wedge block is not greater than 5°.

[0008] The wedge surface locking mechanism, wherein the outer end of the oil cylinder is screwed with a back nut for tightly pressing the elastic member.

[0009] The wedge surface locking mechanism, wherein the elastic member is selected from a disc spring.

[0010] The wedge surface locking mechanism, wherein the driving wedge block and the piston are connected by a screw.

[0011] The advantages of this utility model are: the locking mechanism has low manufacturing cost and simple structure, is compatible with motion components on various machine tools, is easy to install and use, and the wedge-face locking is more reliable and safe. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram showing the embodiment of this utility model installed on a machine tool;

[0013] Figure 2 This is a side view of an embodiment of the present invention installed on a machine tool;

[0014] Figure 3 for Figure 1 Diagram of section cut along line A in the middle;

[0015] Figure 4 for Figure 2 Diagram of section cut along line B in the middle;

[0016] Figure 5 This is a schematic diagram of the force analysis of the wedge surface in an embodiment of the present invention.

[0017] In the diagram: 1 is the base, 2 is the moving part, 3 is the locking mechanism, 4 is the bolt, 5 is the outer shell, 6 is the baffle, 7 is the oil cylinder, 8 is the piston, 9 is the disc spring, 10 is the back nut, 11 is the oil port, 12 is the driving wedge, 13 is the screw, 14 is the driven wedge, and 15 is the slide. Detailed Implementation

[0018] The technical solution of this utility model will now be described in detail with reference to the accompanying drawings. The following embodiments are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical terms used have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should be noted that the terminology used is for describing specific embodiments only and is not intended to limit the scope of this application.

[0019] This embodiment is a wedge-face locking mechanism, see reference. Figures 1 to 4 The system includes a housing 5, an active wedge 12, a driven wedge 14, and a hydraulic cylinder 7. The inner end of the hydraulic cylinder 7 is mounted on the outer end face of the housing 5. The housing 5 has a slide rail 15, and the active wedge 12 and the driven wedge 14 are both located within the slide rail 15. The hydraulic cylinder 7 contains a piston 8 and an elastic element. The piston 8 has multiple seals that cooperate with the hydraulic cylinder 7. The hydraulic cylinder 7 has an oil port 11. The elastic element is a disc spring 9.

[0020] refer to Figure 3 and Figure 4 One end of the piston 8 is connected to the active wedge 12, and the other end is connected to the disc spring 9. Specifically, the active wedge 12 and the piston 8 are connected by a screw 13. The disc spring 9 is used to press the piston 8.

[0021] The active wedge 12 can move transversely in the slide 15 under the action of the piston 8 and the elastic force of the disc spring 9, the driven wedge 14 cooperates with the wedge surface of the active wedge 12, the inner end surface of the slide 15 is provided with the baffle 6, so that the driven wedge 14 can move up and down in the slide 15 to tighten or loosen the moving part 2 of the machine tool.

[0022] The outer end of the oil cylinder 7 is screwed with the back nut 10 for tightening the elastic member, so that the compression amount of the disc spring 9 can be adjusted, that is, the tightening force between the disc spring 9 and the piston 8 can be adjusted.

[0023] The working principle of the locking mechanism is as follows: when in use, the bolt 4 is used to pass through the shell 5 to install the entire locking mechanism on the moving part 2 of the machine tool, as shown in Figure 1 and Figure 2 When the moving part 2 moves on the base 1, the locking mechanism needs to be in a loosened state, at this time, the hydraulic pump station supplies oil to the oil port 11 at a certain pressure, the hydraulic pressure pushes the piston 8 to overcome the tightening force of the disc spring 9 to move to the right, thereby driving the active wedge 12 to move to the right, and the driven wedge 14 moves downward to loosen the moving part 2, and then the moving part 2 can move on the base 1; when the moving part 2 needs to be fixed on the base 1, the locking mechanism needs to be in a tightened state, at this time, the hydraulic pump station stops supplying oil, the disc spring 9 pushes the piston 8 to move to the left, thereby driving the active wedge 12 to move to the left, and the driven wedge 14 moves upward to tighten the moving part 2, achieving the locking effect.

[0024] In the embodiment, the wedge surface angle of the driven wedge 14 and the active wedge 12 is not greater than 5°, taking 4° as an example, as shown in Figure 5 F2 is the thrust provided by the disc spring 9, F1 is the locking force between the base 1 and the moving part 2, F1=F2 / tan4°, it can be known that the locking force at the wedge surface is about 14.2 times the tightening force of the disc spring 9, in addition, the wedge surface not greater than 5° has the characteristics of self-locking, further making the locking stable and reliable.

[0025] The above is only the preferred embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the principle of the present application, a number of changes or improvements can be made, these changes or improvements should also be considered as the protection scope of the present application.

Claims

1. A wedge-face locking mechanism, characterized in that: The machine tool includes a housing (5), an active wedge (12), a driven wedge (14), and a hydraulic cylinder (7). The housing (5) has a slide (15), and the hydraulic cylinder (7) has a piston (8) and an elastic element. One end of the piston (8) is connected to the active wedge (12), and the other end is connected to the elastic element for clamping. The active wedge (12) is driven by the piston (8) and can move laterally in the slide (15). The driven wedge (14) cooperates with the active wedge (12) and can move up and down in the slide (15) to clamp or loosen the moving parts (2) of the machine tool.

2. The wedge locking mechanism according to claim 1, characterized in that: The angle between the driven wedge (14) and the active wedge (12) is no greater than 5°.

3. The wedge locking mechanism according to claim 1, characterized in that: The outer end of the oil cylinder (7) is screwed with a back nut (10) for tightening the elastic element.

4. The wedge locking mechanism according to claim 1 or 3, characterized in that: The elastic element is a disc spring (9).

5. The wedge-face locking mechanism according to claim 1, characterized in that: The active wedge (12) and the piston (8) are connected by screws (13).

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