Built-in rotary oil cylinder of numerical control rotary table of gear hobbing machine

Abstract

The utility model discloses a built-in rotary oil cylinder of a gear hobbing machine numerical control rotary table, which comprises a piston, an oil cylinder cover and an oil cylinder body, the piston, the oil cylinder cover and the oil cylinder body form an oil cylinder assembly, the oil cylinder assembly is fixed with a rotary table top of a working table, a rod outlet end of the piston is provided with an internal thread, a clamp pull rod or a blind rivet is screwed in, and pressure oil is introduced into an upper cavity of the piston to apply pressing force to a workpiece through the piston and the pull rod; the piston rear end groove is used for stopping rotation of the piston and preventing the piston from rotating and being unable to be screwed when the pull rod is screwed. According to the scheme, the oil cylinder is coaxially and fixedly connected with the rotary table top of the workbench and rotates together with the workbench, and therefore a workpiece can be automatically pressed on the supporting clamp; an internal threaded hole is machined in the piston rod, external threads of a pull rod or a blind rivet are connected with the internal threaded hole of the piston, and a workpiece is pressed and fixed to the end face of the rotary table top of the workbench through the oil cylinder piston, the pull rod or the blind rivet. A rotation stopping structure is arranged between the piston and the oil cylinder, and the situation that the piston rotates and cannot be tightened when a blind rivet or a pull rod is screwed in is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of a gear hobbing machine numerical control gear hobbing machine worktable (C axis), and more specifically, to a built-in rotating oil cylinder of a gear hobbing machine numerical control turntable. Background Art

[0002] The CNC rotary table of the gear hobbing machine is a CNC gear hobbing machine that uses the principle of development to process gears, that is, the single-head hob rotates one circle, and the workpiece rotates one tooth. To achieve this transmission relationship, the hob axis and the workpiece rotation axis need to be CNC axes, and this transmission relationship is completed through the control of the CNC system. However, it still has some shortcomings in actual use. For example, in actual applications, there is a lack of a tensioning device that is built into the rotating table of the worktable and rotates synchronously, so that the workpiece cannot be automatically pressed on the supporting fixture, which brings certain inconveniences to use. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a built-in rotating cylinder for a CNC turntable of a gear hobbing machine, so as to solve the problem that the prior art lacks a tensioning device built into the rotating table of the worktable and rotating synchronously in practical applications, thereby failing to automatically press the workpiece onto the supporting fixture.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a rotary cylinder is built into the CNC turntable of the gear hobbing machine, including

[0005] The piston, the cylinder cover and the cylinder body constitute a cylinder assembly, which is fixed to the rotating table of the workbench. The rod end of the piston has an internal thread, and the clamp pull rod or pull nail is screwed in. The pressure oil in the upper chamber of the piston applies a clamping force to the workpiece through the piston and the pull rod; the groove at the rear end of the piston is used to stop the piston from rotating, so as to prevent the piston from rotating and being unable to be screwed in when the pull rod is screwed in.

[0006] It also includes a rotation-stop connector and an oil distribution rod. The rotation-stop connector and the oil distribution rod are fixed to the rear end of the cylinder body by screws. The rotation-stop connector prevents the piston from rotating and introduces hydraulic oil into the upper cavity and the lower cavity of the cylinder body.

[0007] It also includes an oil-proof cover and an encoder. The oil-proof cover is fixed on the oil distribution rod to protect the encoder below. The oil-proof cover rotates with the work surface, and the oil drops falling on the oil-proof cover are thrown away to prevent oil leakage from flowing onto the encoder.

[0008] It also includes an adjusting pad, a seat, and a tight nut. The front end of the inner ring of the encoder is provided with an adjusting pad, which is pressed and fixed to the oil distribution rod by a tight nut. The outer shell of the encoder is fixed to the bolts on the seat, and the seat is fixed to the base of the workbench and can be regarded as an extension of the base.

[0009] The utility model also includes a connecting body and a tension sleeve. The connecting body is connected to the oil distribution rod through the tension sleeve and rotates together with the oil distribution rod.

[0010] It also includes a rotating joint and a stop rod. The rotating shaft of the rotating joint is fixedly connected to the connector by bolts and rotates with the rotating table of the workbench together with the oil distribution rod. The outer shell is flexibly connected to the workbench base through the stop rod.

[0011] The beneficial effects of the above technical solution of the utility model are as follows:

[0012] 1. The oil cylinder is coaxially fixedly connected to the rotating table of the workbench and rotates together with the workbench, so that the workpiece can be automatically pressed on the supporting fixture to improve the applicability of the equipment;

[0013] 2. The piston rod is processed with an internal thread hole, and the external thread of the pull rod or pull nail is connected with the internal thread hole of the piston. The workpiece is pressed and fixed on the end surface of the rotating table of the workbench through the oil cylinder piston, pull rod or pull nail;

[0014] 3. There is a rotation-stopping structure between the piston and the oil cylinder to prevent the piston from rotating together and failing to tighten when the pull pin or pull rod is screwed in;

[0015] 4. The workbench is a CNC turntable, which uses a high-precision circular grating (rotary encoder) with a through hole of Φ20 as a feedback element to achieve full closed-loop control. The inner hole of the encoder is fixedly connected to the oil distribution rod, and the outer shell is connected to the workbench base. When the rotating table of the workbench rotates, the inner ring of the encoder is driven to rotate together to form a full closed-loop signal feedback;

[0016] 5. The oil distribution rod is connected to the hydraulic rotary joint through a connecting assembly. The hydraulic oil flows into the cylinder through the rotary joint and the oil distribution rod to control the extension and retraction of the piston. The rotary joint housing does not rotate relative to the workbench base through the anti-rotation rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] [reference numerals]

[0019] 1. Piston; 2. Cylinder head; 3. Cylinder body; 4. Anti-rotation connector; 5. Oil distribution rod; 6. Oil cover; 7. Adjustment pad; 8. Seat; 9. Encoder; 10. Tightening nut; 11. Connector; 12. Tensioning sleeve; 13. Rotating joint; 14. Anti-rotation rod. DETAILED DESCRIPTION

[0020] 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.

[0021] As attached Figure 1The embodiment of the utility model provides a gear hobbing machine numerical control turntable with a built-in rotary cylinder, comprising

[0022] Piston 1, cylinder cover 2, cylinder body 3, piston 1, cylinder cover 2, cylinder body 3 constitute the cylinder assembly, the cylinder assembly is fixed to the rotating table of the workbench, the rod end of piston 1 has an internal thread, the fixture pull rod or pull nail is screwed in, the pressure oil in the upper chamber of piston 1 passes through piston 1 and the pull rod to apply a clamping force to the workpiece; the rear end groove of piston 1 is used to stop piston 1 from rotating, and when the pull rod is screwed in, it is prevented that piston 1 cannot rotate and cannot be screwed in; there are three structures for introducing pressure oil through the rotary joint:

[0023] 1. The oil cylinder is directly connected to the rotary joint 13. The rotary joint 13 is of non-standard design. The rotary shaft is made into a form with two ends of the shaft extending. One end is connected to the oil cylinder and the other end is connected to the encoder 9. In this way, the encoder 9 in the form of a shaft extending can be connected to the other end of the rotary shaft of the rotary joint 13 through a coupling.

[0024] 2. The oil cylinder is directly connected to the rotary joint 13, the rotary joint 13 is a standard product, and the encoder 9 is a steel belt grating scale angle encoder.

[0025] 3. Select the encoder 9 with the middle through hole, the oil cylinder is connected to the encoder 9 through the oil distribution rod 5, the oil distribution rod 5 is connected to the rotary joint 13, and the rotary joint 13 uses a standard product.

[0026] It also includes a stopper connector 4 and an oil distribution rod 5. The stopper connector 4 and the oil distribution rod 5 are fixed to the rear end of the cylinder body 3 by screws. The stopper connector 4 prevents the piston 1 from rotating and introduces hydraulic oil into the upper chamber and the lower chamber of the cylinder body 3.

[0027] It also includes an oil-proof cover 6 and an encoder 9. The oil-proof cover 6 is fixed on the oil distribution rod 5 to protect the encoder 9 below. The oil-proof cover 6 rotates with the work surface, and the oil drops falling on the oil-proof cover 6 are thrown away to prevent oil leakage from flowing onto the encoder 9. The encoder 9 adopts a standard hollow shaft high-precision encoder. Considering the need to reduce costs and reduce size, an angle encoder with a through hole of Φ20 is selected.

[0028] It also includes an adjusting pad 7, a seat 8, and a tight nut 10. The front end of the inner ring of the encoder 9 is provided with an adjusting pad 7, which is pressed and fixed to the oil distribution rod 5 by the tight nut 10. The outer shell of the encoder 9 is fixed to the bolts on the seat 8. The seat 8 is fixed to the base of the workbench and can be regarded as an extension of the base.

[0029] The connecting body 11 and the tension sleeve 12 are also included. The connecting body 11 is connected to the oil distribution rod 5 through the tension sleeve 12 and rotates together with the oil distribution rod 5 .

[0030] It also includes a rotary joint 13 and a stop rod 14. The rotary shaft of the rotary joint 13 is fixedly connected to the connector 11 by bolts and rotates with the rotating table surface of the workbench together with the oil distribution rod 5. The outer shell is flexibly connected to the workbench base or the base extension through the stop rod 14. The rotary joint 13 uses a standard two-way hydraulic rotary joint.

[0031] 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;

[0032] 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;

[0033] 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. The CNC turntable of the gear hobbing machine has a built-in rotary cylinder, which is characterized by: include A piston (1), a cylinder cover (2), and a cylinder body (3), wherein the piston (1), the cylinder cover (2), and the cylinder body (3) form a cylinder assembly, which is fixed to a rotating table surface of a workbench. The rod end of the piston (1) has an internal thread, into which a clamp pull rod or a pull pin is screwed. Pressure oil passes through the upper chamber of the piston (1) to apply a clamping force to a workpiece through the piston (1) and the pull rod. The rear end groove of the piston (1) is used to stop the piston (1) from rotating, so as to prevent the piston (1) from rotating and being unable to be screwed in when the pull rod is screwed in.

2. The built-in rotary cylinder of the CNC turntable of the gear hobbing machine according to claim 1 is characterized in that: It also includes a rotation-stopping connector (4) and an oil distribution rod (5). The rotation-stopping connector (4) and the oil distribution rod (5) are fixed to the rear end of the oil cylinder body (3) by screws. The rotation-stopping connector (4) prevents the piston (1) from rotating, and at the same time introduces hydraulic oil into the upper chamber of the oil cylinder body (3) and the lower chamber of the oil cylinder body (3).

3. The built-in rotary cylinder of the CNC turntable of the gear hobbing machine according to claim 1 is characterized in that: It also includes an oil-proof cover (6) and an encoder (9). The oil-proof cover (6) is fixed on the oil distribution rod (5) to protect the encoder (9) below. The oil-proof cover (6) rotates with the work surface, and oil drops falling on the oil-proof cover (6) are thrown away, thereby preventing oil from leaking onto the encoder (9).

4. The built-in rotary cylinder of the CNC turntable of the gear hobbing machine according to claim 3 is characterized in that: It also includes an adjustment pad (7), a seat (8), and a tight nut (10). The front end of the inner ring of the encoder (9) is provided with an adjustment pad (7), which is pressed and fixed to the oil distribution rod (5) through the tight nut (10). The housing of the encoder (9) is fixed to the bolts on the seat (8). The seat (8) is fixed to the base of the workbench and can be regarded as an extension of the base.

5. The built-in rotary cylinder of the CNC turntable of the gear hobbing machine according to claim 1 is characterized in that: It also comprises a connecting body (11) and a tension sleeve (12); the connecting body (11) is connected to the oil distribution rod (5) via the tension sleeve (12) and rotates together with the oil distribution rod (5).

6. The built-in rotary cylinder of the CNC turntable of the gear hobbing machine according to claim 1 is characterized in that: It also comprises a rotating joint (13) and a stop rod (14); the rotating shaft of the rotating joint (13) is fixedly connected to the connecting body (11) by bolts and rotates with the rotating table surface of the workbench together with the oil distribution rod (5); and the outer shell is flexibly connected to the workbench base by the stop rod (14).

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