High-precision combined automatic tensioning tool of numerical control gear hobbing machine

Abstract

The utility model relates to the technical field of machining, in particular to a numerical control gear hobbing machine high-precision combined automatic tensioning tool which comprises a base body, one end of the base body is provided with a first external thread groove, the outer side of the first external thread groove is connected with a first rotating cylinder through an internal thread groove, and the inner side of the base body is provided with a connecting frame. The outer side of the connecting frame is provided with a core rod, one end of the core rod is provided with a second external thread groove, the outer side of the second external thread groove is connected with a second rotating cylinder through an internal thread groove, the inner side of the core rod is provided with a taper pull rod, and the outer side of the first rotating cylinder and the outer side of the second rotating cylinder are both fixedly provided with anti-slip strips. By arranging the first external thread groove, the first rotating cylinder, the connecting frame, the core rod, the second external thread groove, the second rotating cylinder, the taper pull rod, the first anti-skid sleeve, the second anti-skid sleeve, the flange and the connecting rod, the working efficiency is improved, and the practicability is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a high-precision combined automatic tightening tool for a numerically controlled gear hobbing machine. Background Art

[0002] In the past, the conventional gear hobbing accuracy level of general gear hobbing machines was all at level 9. At the same time, the previous top tightening method of the machine tool adopted a tapered thimble point contact top tightening method, which produced slight resonance during the production process, causing the tooth shape accuracy to be affected and reduced.

[0003] After searching, the patent number CN206717194U has been published, which mentions a high-precision combined automatic tightening tool for a CNC gear hobbing machine. The tool includes an upper ejector, a mandrel, a taper pull rod, a connecting flange, a connecting shaft and a base. The taper pull rod is embedded in the mandrel, with the mandrel exposed at both ends. The upper end is connected to the upper ejector, and the lower end is connected to the connecting shaft. The lower end of the mandrel is connected to the base through a connecting flange. The connecting shaft passes through the base and the connecting flange and is connected to the taper pull rod. The utility model improves the tool design by changing the positioning to the center axis and the entire surface tightening method, which increases the rigidity of the tool. In addition, the previous product loading and unloading method was through the nut tightening method. After the improvement, the upper and lower parts are all completed automatically by hydraulic pressure, which not only meets the requirement of the gear hobbing machine to directly roll 8-level precision gears, but also reduces the labor intensity of employees and improves work efficiency.

[0004] Although the above solution solves the problems raised in the background technology, it still has the following shortcomings: poor stability during product processing, easy deviation, resulting in poor product precision, and thus low work efficiency and poor practicality. Utility Model Content

[0005] The utility model aims to provide a high-precision combined automatic tensioning tool for a CNC gear hobbing machine to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A high-precision combined automatic tensioning tool for a CNC gear hobbing machine includes a base body, one end of the base body is provided with a first external thread groove, the outer side of the first external thread groove is connected to a first rotary cylinder via an internal thread groove, the inner side of the base body is provided with a connecting frame, the outer side of the connecting frame is provided with a core rod, one end of the core rod is provided with a second external thread groove, the outer side of the second external thread groove is connected to a second rotary cylinder via an internal thread groove, the inner side of the core rod is provided with a tapered pull rod, and the outer sides of the first rotary cylinder and the second rotary cylinder are fixedly installed with anti-slip strips.

[0008] As a preferred solution of the utility model, the other end of the base body is fixedly connected to a first anti-slip sleeve, and the other end of the core rod is fixedly connected to a second anti-slip sleeve.

[0009] As a preferred solution of the utility model, the inner side of the first rotary cylinder is connected to the outer side of the first external thread groove through an internal thread groove, and the inner side of the second rotary cylinder is connected to the outer side of the second external thread groove through an internal thread groove.

[0010] As a preferred solution of the utility model, a flange is fixedly connected to the outer side of the connecting frame near the core rod.

[0011] As a preferred solution of the utility model, the bottom end of the tapered pull rod is connected to a connecting rod, and the top end of the tapered pull rod is connected to an upper ejector pin.

[0012] As a preferred solution of the present utility model, the number of the anti-slip strips is two.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In the utility model, a first external thread groove, a first rotary cylinder, a connecting frame, a core rod, a second external thread groove, a second rotary cylinder, a tapered pull rod, a first anti-slip sleeve, a second anti-slip sleeve, a flange and a connecting rod are arranged in a high-precision combined automatic tightening tooling of a CNC gear hobbing machine, so that the connecting frame is inserted into the interior of the core rod, and the second rotary cylinder is rotated. Under the action of the second external thread groove, the second rotary cylinder is driven to move, and the second anti-slip sleeve is squeezed to produce deformation, so that the second anti-slip sleeve is pressed against the connecting frame to play a certain fixing role. With the cooperation of the first external thread groove, the first rotary cylinder, the tapered pull rod, the first anti-slip sleeve, the flange and the connecting rod, the work efficiency is improved and the practicality is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the base body, the first external thread groove and the first anti-slip sleeve of the utility model;

[0017] Figure 3 It is a schematic structural diagram of the core rod, the second external thread groove and the second anti-slip sleeve of the utility model.

[0018] In the figure: 1. base body; 2. first external thread groove; 3. first rotary cylinder; 4. connecting frame; 5. core rod; 6. second external thread groove; 7. second rotary cylinder; 8. tapered pull rod; 9. anti-slip strip; 10. first anti-slip sleeve; 11. second anti-slip sleeve; 12. flange; 13. connecting rod; 14. upper ejector pin. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively with reference to the relevant drawings below. Several embodiments of the utility model are given. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0024] A high-precision combined automatic tightening tool for a CNC gear hobbing machine comprises a base body 1, a first external thread groove 2 is provided at one end of the base body 1, a first rotary cylinder 3 is connected to the outer side of the first external thread groove 2 through an internal thread groove, a connecting frame 4 is provided on the inner side of the base body 1, a core rod 5 is provided on the outer side of the connecting frame 4, a second external thread groove 6 is provided at one end of the core rod 5, a second rotary cylinder 7 is connected to the outer side of the second external thread groove 6 through an internal thread groove, and a tapered pull rod 8 is provided on the inner side of the core rod 5, so that the connecting frame 4 is inserted into the core rod 5, the second rotary cylinder 7 is rotated, and the second rotary cylinder 7 is driven to move under the action of the second external thread groove 6, and the second anti-slip sleeve 11 is squeezed to produce deformation, so that the second anti-slip sleeve 11 is pressed against the connecting frame 4, which plays a certain fixing role, the base body 1 is sleeved on the connecting frame 4, and the first rotary cylinder 3 is rotated. Under the cooperation of the first external thread groove 2, the tapered pull rod 8, the first anti-slip sleeve 10, the flange 12 and the connecting rod 13, the working efficiency is improved;

[0025] The other end of the base body 1 is fixedly connected to a first anti-slip sleeve 10, and the other end of the core rod 5 is fixedly connected to a second anti-slip sleeve 11, the inner side of the first rotary cylinder 3 is connected to the outer side of the first external thread groove 2 through an internal thread groove, and the inner side of the second rotary cylinder 7 is connected to the outer side of the second external thread groove 6 through an internal thread groove, and the outer side of the connecting frame 4 is fixedly connected to a flange 12 on the side close to the core rod 5, the bottom end of the tapered pull rod 8 is connected to a connecting rod 13, and the top end of the tapered pull rod 8 is connected to an upper ejector pin 14, so that the connecting frame 4 is inserted into the interior of the core rod 5, and the second rotary cylinder 7 is rotated, and the second external thread groove 6 is brought under the action of the second external thread groove 6. The second rotary cylinder 7 is moved to squeeze the second anti-slip sleeve 11 to produce deformation, so that the second anti-slip sleeve 11 is pressed against the connecting frame 4, which plays a certain fixing role; the base body 1 is sleeved on the connecting frame 4, and the first rotary cylinder 3 is rotated to drive the first rotary cylinder 3 to move through the first external thread groove 2, squeezing the first anti-slip sleeve 10 to produce deformation, so that the first anti-slip sleeve 10 is pressed against the connecting frame 4, and the stability is enhanced with the cooperation of the flange 12. At the same time, one end of the connecting rod 13 is tightened by hydraulic pressure, and the upper ejector pin 14 presses the positioning taper pull rod 8, thereby improving the accuracy, reducing the error, improving the work efficiency, and enhancing the practicality.

[0026] In this embodiment, please refer to Figure 1 The outer sides of the first rotary drum 3 and the second rotary drum 7 are fixedly mounted with anti-skid strips 9, so that the friction coefficient is increased by the anti-skid strips 9;

[0027] There are two anti-skid strips 9 , so that the friction coefficient is increased by the anti-skid strips 9 , which facilitates the rotation of the first rotary drum 3 and the second rotary drum 7 .

[0028] The working process of the utility model is as follows: when in use, check whether the appearance of the tooling is damaged. After the inspection is completed, insert the connecting frame 4 into the core rod 5, rotate the second rotary cylinder 7, and drive the second rotary cylinder 7 to move under the action of the second external thread groove 6, squeeze the second anti-slip sleeve 11 to produce deformation, so that the second anti-slip sleeve 11 is tightly pressed against the connecting frame 4, which plays a certain fixing role, and the base body 1 is sleeved on the connecting frame 4, and the first rotary cylinder 3 is rotated, and the first external thread groove 2 drives the first rotary cylinder 3 to move, squeezes the first anti-slip sleeve 10 to produce deformation, so that the first anti-slip sleeve 10 is tightly pressed against the connecting frame 4, and the stability is enhanced with the cooperation of the flange 12. At the same time, one end of the connecting rod 13 is tightened by hydraulic pressure, and the upper ejector pin 14 presses the positioning taper pull rod 8 to improve accuracy, reduce errors, and improve work efficiency. Among them, the friction coefficient is increased by the anti-slip strip 9, which is convenient for rotating the first rotary cylinder 3 and the second rotary cylinder 7, enhances practicality, and has promotion value.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision combined automatic tensioning tool for a CNC gear hobbing machine, comprising a base body (1), characterized in that: A first external thread groove (2) is provided at one end of the base body (1), and the outer side of the first external thread groove (2) is connected to a first rotary cylinder (3) via an internal thread groove. A connecting frame (4) is provided on the inner side of the base body (1), and a core rod (5) is provided on the outer side of the connecting frame (4). A second external thread groove (6) is provided at one end of the core rod (5), and the outer side of the second external thread groove (6) is connected to a second rotary cylinder (7) via an internal thread groove. A tapered pull rod (8) is provided on the inner side of the core rod (5), and anti-slip strips (9) are fixedly installed on the outer sides of the first rotary cylinder (3) and the second rotary cylinder (7).

2. The high-precision combined automatic tensioning tool for a CNC gear hobbing machine according to claim 1, characterized in that: The other end of the base body (1) is fixedly connected to a first anti-slip sleeve (10), and the other end of the core rod (5) is fixedly connected to a second anti-slip sleeve (11).

3. The high-precision combined automatic tensioning tool for a CNC gear hobbing machine according to claim 1, characterized in that: The inner side of the first rotating cylinder (3) is connected to the outer side of the first external thread groove (2) through an internal thread groove, and the inner side of the second rotating cylinder (7) is connected to the outer side of the second external thread groove (6) through an internal thread groove.

4. The high-precision combined automatic tensioning tool for a CNC gear hobbing machine according to claim 1, characterized in that: A flange (12) is fixedly connected to the outer side of the connecting frame (4) close to the core rod (5).

5. The high-precision combined automatic tensioning tool for a CNC gear hobbing machine according to claim 1, characterized in that: The bottom end of the tapered pull rod (8) is connected to a connecting rod (13), and the top end of the tapered pull rod (8) is connected to an upper ejector pin (14).

6. The high-precision combined automatic tensioning tool for a CNC gear hobbing machine according to claim 1, characterized in that: The number of the anti-slip strips (9) is two.

Images