Automatic broach device for short main shaft of machine tool

Abstract

The utility model discloses an automatic broach device of a machine tool short main shaft. The automatic broach device is mainly composed of a gland, a bearing, a main shaft, an end face key, a main shaft connecting sleeve, a spacer bush, an internal thread pull claw, a spacer pad, a disc spring assembly, a bevel gear, a pull rod, a bearing, a precise lock nut, a cylinder barrel, a piston, a sealing ring, a rotation stopping rod, a thrust bearing and a connector. The main shaft is connected with the main shaft connecting sleeve through a fastener; the bearing, the spacer bush, the bevel gear and the bearing are installed on the outer circle surface of the main shaft and locked and fixed through the precise lock nut. According to the scheme, the main shaft and the main shaft connecting sleeve are assembled in a split mode, so that machining and precision control are facilitated; a main shaft transmission part bevel gear is arranged between supporting bearings, so that power transmission is facilitated; the pull rod is short, the broach loosening stroke is easy to adjust and assemble, the thrust bearing is arranged between the tail and the piston, the service life of a piston sealing ring is prolonged, and the device has the advantages of being simple in structure, compact in layout, high in machining precision and stability, convenient to maintain, long in service life and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of broaching devices, and more specifically, to an automatic broaching device for a short spindle of a machine tool. Background Art

[0002] During the design of the machine tool, due to the limitations of structure and space layout, the drive device and reduction device are located at the tail or side of the machine tool, and the spindle output is at the front end. Due to the length of the spindle structure, the broaching device is long, the structure is complex, and it is not easy to assemble, which affects the processing accuracy.

[0003] If the broaching device is too long, it is easy to cause the broaching stroke to be insufficient, resulting in tool change failure, tool jumping or tool falling, high failure rate and inconvenient maintenance. The elastic element of the broaching device will be fatigued and replaced frequently, and the elastic element is installed in a deeper part of the spindle inner hole, which is not easy to repair. Once it fails, it will directly cause tool falling failure. In view of this, it is necessary to invent an automatic broaching device for a short spindle of a machine tool to solve the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides an automatic tool pulling device for a short spindle of a machine tool, so as to solve the problems that the tool pulling device in the prior art is too long, easily causing the tool loosening and pulling stroke to be not in place, resulting in tool changing failure, tool jumping or tool falling, high failure rate and inconvenient maintenance.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: an automatic broaching device for a short spindle of a machine tool, mainly composed of a pressure cover, a bearing, a spindle, an end key, a spindle sleeve, a spacer, an internal threaded pulling claw, a spacer, a disc spring assembly, a bevel gear, a pull rod, a bearing, a precision lock nut, a cylinder, a piston, a sealing ring, a stop rod, a thrust bearing, and a joint.

[0006] Wherein, the main shaft and the main shaft socket are connected by fasteners.

[0007] Among them, the bearing, spacer sleeve, bevel gear and bearing are installed on the outer cylindrical surface of the main shaft and locked and fixed with a precision lock nut.

[0008] Among them, the spacer and disc spring assembly are installed in the annular groove between the main shaft and the main shaft sleeve.

[0009] Among them, after the pull rod is connected to the internal threaded claw, the outer cylindrical end surface of the pull rod is pressed on the disc spring assembly, a thrust bearing is provided between the tail of the pull rod and the piston, and a stop rod is provided between the piston and the cylinder diameter.

[0010] The beneficial effects of the above technical solution of the utility model are as follows:

[0011] The utility model adopts a split assembly method of the main shaft and the main shaft sleeve, which is convenient for processing and controlling accuracy; the bevel gear of the main shaft transmission component is arranged between the supporting bearings, which is beneficial to power transmission; the pull rod is short in length, and the loosening and pulling tool stroke is easy to adjust and assemble, and a thrust bearing is arranged between the tail and the piston to extend the service life of the piston sealing ring. The whole device has the characteristics of simple structure, compact layout, high processing accuracy, high stability, convenient maintenance, long service life, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic cross-sectional view of the overall structure of the utility model.

[0014] [reference numerals]

[0015] 1. Pressure cap; 2. Bearing; 3. Spindle; 4. End key; 5. Spindle socket; 6. Spacer; 7. Internal thread claw; 8. Spacer; 9. Disc spring assembly; 10. Bevel gear; 11. Pull rod; 12. Bearing; 13. Precision lock nut; 14. Cylinder; 15. Piston; 16. Sealing ring; 17. Stop rod; 18. Thrust bearing; 19; Connector. DETAILED DESCRIPTION

[0016] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0017] As attached Figure 1 To Attachment Figure 2 The embodiment of the utility model provides an automatic broaching device for a short spindle of a machine tool, which is mainly composed of a pressure cover 1, a bearing 2, a spindle 3, an end key 4, a spindle sleeve 5, a spacer sleeve 6, an internal threaded claw 7, a spacer 8, a disc spring assembly 9, a bevel gear 10, a pull rod 11, a bearing 12, a precision lock nut 13, a cylinder 14, a piston 15, a sealing ring 16, a stop rod 17, a thrust bearing 18, and a joint 19.

[0018] The main shaft 3 and the main shaft socket 5 are connected by fasteners; the fasteners can facilitate the replacement of the main shaft 3 during processing or when it is damaged.

[0019] Among them, the bearing 2, the spacer sleeve 6, the bevel gear 10, and the bearing 12 are installed on the outer cylindrical surface of the main shaft 3 and locked and fixed with a precision lock nut 13.

[0020] Among them, the spacer 8 and the disc spring assembly 9 are installed in the annular groove between the main shaft 3 and the main shaft sleeve 5.

[0021] Among them, after the pull rod 11 is connected to the internal threaded claw 7, the outer cylindrical end surface of the pull rod 11 is pressed on the disc spring assembly 9, a thrust bearing 18 is provided between the tail end of the pull rod 11 and the piston 15, and a stop rod 17 is provided between the diameter of the piston 15 and the cylinder 14; even if the main shaft rotates at high speed, there is no relative rotation between the piston 15 and the cylinder 14, thereby extending the service life of the sealing ring 16 on the piston 15.

[0022] The working process of the utility model is as follows: when the knife is pulled, the disc spring assembly 9 provides the power source; when the knife is loosened, the hydraulic mechanism or pneumatic mechanism provides the power source, and the joint 19 enters the bottom of the piston 15, so that the piston 15 extends and compresses the disc spring assembly 9 to complete the knife loosening action. The hydraulic mechanism and the pneumatic mechanism can be controlled by the main equipment control system, with a high degree of automation, stability and reliability.

[0023] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0024] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0025] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An automatic broaching device for a short spindle of a machine tool, characterized in that: It mainly consists of a gland (1), a bearing (2), a main shaft (3), an end key (4), a main shaft sleeve (5), a spacer (6), an internal threaded claw (7), a spacer (8), a disc spring assembly (9), a bevel gear (10), a pull rod (11), a bearing (12), a precision lock nut (13), a cylinder (14), a piston (15), a sealing ring (16), a stop rod (17), a thrust bearing (18), and a joint (19).

2. The automatic broaching device for a short spindle of a machine tool according to claim 1, characterized in that: The main shaft (3) and the main shaft connecting sleeve (5) are connected by fasteners.

3. The automatic broaching device for a short spindle of a machine tool according to claim 1, characterized in that: The bearing (2), the spacer sleeve (6), the bevel gear (10) and the bearing (12) are mounted on the outer cylindrical surface of the main shaft (3) and are locked and fixed by a precision lock nut (13).

4. The automatic broaching device for a short spindle of a machine tool according to claim 1, characterized in that: The spacer (8) and the disc spring assembly (9) are installed in the annular groove between the main shaft (3) and the main shaft sleeve (5).

5. The automatic broaching device for a short spindle of a machine tool according to claim 1, characterized in that: After the pull rod (11) is connected to the internal threaded claw (7), the outer cylindrical end surface of the pull rod (11) is pressed on the disc spring assembly (9), a thrust bearing (18) is provided between the tail of the pull rod (11) and the piston (15), and a stop rod (17) is provided between the diameter of the piston (15) and the cylinder (14).

Images