Precise worm gear hobbing device

Abstract

The utility model discloses a precise worm gear hobbing device which comprises an upper tool, a precise worm gear, a lower tool and a high-precision hobbing cutter, wherein the precise worm gear and the lower tool are sequentially arranged at the bottom of the upper tool, and the high-precision hobbing cutter is arranged on the side face of the precise worm gear. A workbench is installed at the bottom of the lower tool. The upper tool comprises a center plate and a workpiece gland installed at the bottom of the center plate. The bottom of the workpiece gland is in contact with the top of the precise worm gear; the upper tool and the lower tool are arranged at the top and the bottom of the precise worm wheel respectively, the spring chuck is tightened and opened through cooperation of the push-pull rod, the precise worm wheel can be firmly fixed, machining deformation is effectively prevented, and the positioning precision and the machining precision are improved. When the model of the precise worm gear is replaced every time, only the workpiece gland, the conical supporting sleeve and the spring chuck need to be replaced, time and labor are saved, operation is easy, and the rotation stopping screw is screwed into the conical supporting sleeve to abut against the spring chuck, so that the spring chuck can be prevented from rotating and displacing relative to the conical supporting sleeve.

Description

Technical Field

[0001] This utility model relates to the field of precision machining technology for worm gear parts, and in particular to a precision worm gear hobbing device. Background Technology

[0002] Worm gear hobbing devices are widely used in worm gear machining and are also suitable for precision machining of components used in industries such as spur gears, bevel gears, helical gears, and sprockets. A worm gear hobbing device is a high-precision positioning and mounting device that accurately positions and fixes the worm gear, ensuring high precision in the machined worm gear and facilitating the hobbing process. With the development of manufacturing technology, the performance requirements for precisely positioned and fixed worm gear hobbing devices are becoming increasingly stringent. Existing worm gear hobbing devices have the following problems:

[0003] 1. The existing worm gear hobbing device is not firmly positioned and cannot adapt to the machining of worm gears of different sizes, making changeover time-consuming and labor-intensive.

[0004] 2. Existing worm gear hobbing devices generally have low positioning accuracy and produce poor precision parts, which cannot meet the requirements for high-precision applications.

[0005] Therefore, in order to address the above problems, it is necessary to innovate and improve upon the existing worm gear hobbing device. Summary of the Invention

[0006] This invention overcomes the shortcomings of the prior art and provides a precision worm gear hobbing device.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a precision worm gear hobbing device, comprising: an upper fixture, a precision worm gear and a lower fixture sequentially arranged at the bottom of the upper fixture, and a high-precision hobbing cutter arranged on the side of the precision worm gear; a worktable is installed at the bottom of the lower fixture;

[0008] The upper tooling includes: a center plate, and a workpiece cover installed at the bottom of the center plate; the bottom of the workpiece cover contacts the top of the precision worm gear;

[0009] The lower tooling includes: a tapered support sleeve disposed at the bottom of the precision worm gear, an ejector pin sleeved inside the tapered support sleeve, and a spring collet and a threaded pull sleeve sequentially sleeved on the side of the ejector pin; the tapered support sleeve has an anti-rotation screw threaded to its side, and a pull post and a pull stud are sequentially installed at the bottom of the threaded pull sleeve, with ejector pin seats sleeved on the sides of the pull post and the pull stud;

[0010] The bottom of the ejector pin seat is equipped with a base. The bottom of the pull pin, the top of the ejector pin seat, and the top of the base are all provided with connecting screws. A push-pull rod is slidably connected to the inner side of the base. An O-ring, a buffer spring, and a pull claw are sequentially installed on the top of the push-pull rod.

[0011] In a preferred embodiment of this utility model, the side of the anti-rotation screw near one end is threaded to the inner side of the spring collet, and one end abuts against the side of the ejector pin; the top of the ejector pin abuts against the bottom of the precision worm gear, and the side of the pull claw near the top is engaged with the side of the pull pin located inside the base.

[0012] In a preferred embodiment of this utility model, the connecting screw at the bottom of the pull stud is sequentially connected to the inner threads of the pull stud, the pull post, and the threaded sleeve; the connecting screw at the top of the ejector seat is sequentially connected to the inner threads of the ejector seat and the base; and the connecting screw at the top of the base is sequentially connected to the inner threads of the base and the worktable.

[0013] In a preferred embodiment of this utility model, the center plate, the workpiece pressure cover, the precision worm gear, the ejector pin, the tapered support sleeve, the spring collet, the threaded pull sleeve, the pull column, the ejector pin seat, the pull stud, the pull claw, the push-pull rod, and the base are all coaxially arranged.

[0014] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0015] (1) This utility model provides a precision worm gear hobbing device. By setting upper and lower tooling at the top and bottom of the precision worm gear respectively, and through the cooperation of push-pull rods, the spring collet is tightened and opened, which can firmly fix the precision worm gear and effectively prevent machining deformation, thereby improving positioning accuracy and machining accuracy. Each time the precision worm gear model is changed, only the workpiece pressure cap, tapered support sleeve, and spring collet need to be replaced, which saves time and effort and is simple to operate. The anti-rotation screw is screwed into the tapered support sleeve to hold the spring collet in place, which can prevent the spring collet from rotating relative to the tapered support sleeve. The pull pin and the push-pull rod are flexibly connected by pull claws to prevent rigid impact and damage to the tooling and worm gear. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a perspective structural diagram of a preferred embodiment of the present invention;

[0018] Figure 2 This is a partial cross-sectional view of a preferred embodiment of the present invention;

[0019] Fig. 1, upper tooling; 11, center disc; 12, workpiece gland; 2, precision worm; 3, lower tooling; 31, center pin; 32, rotation-stopping screw; 33, conical support sleeve; 34, spring collet; 35, threaded pull sleeve; 36, connecting screw; 37, pull column; 38, center pin seat; 39, pull pin; 310, pull claw; 311, buffer spring; 312, O-ring; 313, push-pull rod; 314, base; 4, high-precision hob; 5, workbench. DETAILED DESCRIPTION

[0020] The utility model will be explained in further detail in combination with the drawings and embodiments, these drawings are all simplified schematic diagram, only with schematic way illustrates the basic structure of the utility model, therefore it only shows the structure related to the utility model.

[0021] As shown in Figure 1 and Figure 2 A precision worm 2 hobbing device, comprising: upper tooling 1, precision worm 2 and lower tooling 3 arranged in sequence at the bottom of upper tooling 1, and high-precision hob 4 arranged at the side of precision worm 2;The bottom of lower tooling 3 is provided with workbench 5;Upper tooling 1 comprises: center disc 11, and workpiece gland 12 installed at the bottom of center disc 11;The bottom of workpiece gland 12 is in contact with the top of precision worm 2;Lower tooling 3 comprises: conical support sleeve 33 arranged at the bottom of precision worm 2, center pin 31 sleeved on the inner side of conical support sleeve 33, and spring collet 34 and threaded pull sleeve 35 sleeved in sequence on the side of center pin 31;The side of conical support sleeve 33 is screw-connected with rotation-stopping screw 32, the bottom of threaded pull sleeve 35 is sequentially provided with pull column 37 and pull pin 39, and the side of pull column 37 and pull pin 39 is sleeved with center pin seat 38;The bottom of center pin seat 38 is provided with base 314, the bottom of pull pin 39, the top of center pin seat 38 and the top of base 314 are all provided with connecting screw 36, the inner side of base 314 is slidingly connected with push-pull rod 313, and the top of push-pull rod 313 is sequentially provided with O-ring 312, buffer spring 311 and pull claw 310.

[0022] It needs to be explained that the side of the rotation stop screw 32 close to one end is screwed with the inner side of the spring collet 34, and one end is in contact with the side of the ejector pin 31. The top of the ejector pin 31 is in contact with the bottom of the precision worm gear 2, and the side of the pull claw 310 close to the top is clamped with the side of the pull pin 39 inside the base 314. The connecting screw 36 at the bottom of the pull pin 39 is screwed with the inner side of the pull pin 39, the pull column 37 and the threaded pull sleeve 35 in turn. The connecting screw 36 at the top of the ejector pin holder 38 is screwed with the inner side of the ejector pin holder 38 and the base 314 in turn. The connecting screw 36 at the top of the base 314 is screwed with the inner side of the base 314 and the workbench 5 in turn. The center of the center disc 11, the workpiece gland 12, the precision worm gear 2, the ejector pin 31, the conical support sleeve 33, the spring collet 34, the threaded pull sleeve 35, the pull column 37, the ejector pin holder 38, the pull pin 39, the pull claw 310, the push-pull rod 313 and the base 314 are coaxially arranged.

[0023] Specifically, the center disc 11 is connected with the upper shaft of the gear hobbing machine, the center disc 11 and the workpiece gland 12 are fastened together by bolts to assemble the upper tooling 1, the conical support sleeve 33 is inverted, and the spring collet 34, the threaded pull sleeve 35, the ejector pin 31, the ejector pin holder 38, the pull column 37 and the pull pin 39 are sequentially put in, the threaded pull sleeve 35 is locked with the pull column 37 and the pull pin 39 by using the connecting screw 36, and the rotation stop screw 32 is screwed into the conical support sleeve 33. The pull claw 310, the buffer spring 311, the O-ring 312, the push-pull rod 313 and the base 314 are assembled together by using a special assembly jig, the ejector pin holder 38 and the base 314 are locked by the connecting screw 36 to assemble the lower tooling 3. The lower tooling 3 is locked with the workbench 5 by the connecting screw 36. The workbench 5 is connected with the lower shaft of the gear hobbing machine. The high-precision hob 4 is installed on the transverse shaft of the gear hobbing machine. The push-pull rod 313 is pushed up or pulled down by the pneumatic or electric device below the workbench 5 to drive the internal parts to link, so that the spring collet 34 can be tightened and opened, the precision worm gear 2 can be fixed firmly, the machining deformation can be effectively prevented, and the positioning accuracy and machining accuracy can be improved. When the model of the precision worm gear 2 is replaced, only the workpiece gland 12, the conical support sleeve 33 and the spring collet 34 need to be replaced, which saves time and effort and is simple to operate. The rotation stop screw is screwed into the conical support sleeve 33 to push against the spring collet 34, which can prevent the spring collet 34 from rotating and displacing relative to the conical support sleeve 33. The pull claw 310 is flexibly connected between the pull pin 39 and the push-pull rod 313 to prevent rigid impact and damage to the tooling and the worm gear.

[0024] The utility model discloses a worm wheel hobbing device, including the workbench 5, the lower tooling 3 and the upper tooling 1, the precision worm wheel 2, the conical support sleeve 33 and the spring chuck 34, the workbench 5 is connected with the lower rotating shaft of the hobbing machine, the upper tooling 1 is connected with the upper rotating shaft of the hobbing machine, the precision worm wheel 2 is placed on the plane of the conical support sleeve 33, and the spring chuck 34 is penetrated.

[0025] The above is according to the ideal embodiment of the utility model for the inspiration, through the above-mentioned explanation content, for the technical personnel in the field, obviously, the utility model is not limited to the details of the above exemplary embodiments, and can realize the utility model in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0026] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and the skilled person should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that can be understood by the skilled person.

Claims

1. A precision worm gear hobbing device, characterized in that, include: The upper fixture (1) is provided with a precision worm gear (2) and a lower fixture (3) arranged sequentially at the bottom of the upper fixture (1), and a high-precision hob (4) arranged on the side of the precision worm gear (2); a worktable (5) is installed at the bottom of the lower fixture (3). The upper tooling (1) includes: a center plate (11) and a workpiece cover (12) installed at the bottom of the center plate (11); the bottom of the workpiece cover (12) is in contact with the top of the precision worm gear (2); The lower tooling (3) includes: a tapered support sleeve (33) disposed at the bottom of the precision worm gear (2), an ejector pin (31) sleeved inside the tapered support sleeve (33), and a spring collet (34) and a threaded pull sleeve (35) sequentially sleeved on the side of the ejector pin (31); the tapered support sleeve (33) is threaded with an anti-rotation screw (32) on its side, and a pull post (37) and a pull stud (39) are sequentially installed at the bottom of the threaded pull sleeve (35); an ejector pin seat (38) is sleeved on the side of the pull post (37) and the pull stud (39); The bottom of the ejector pin seat (38) is equipped with a base (314). The bottom of the pull pin (39), the top of the ejector pin seat (38) and the top of the base (314) are all provided with connecting screws (36). The inner side of the base (314) is slidably connected with a push-pull rod (313). The top of the push-pull rod (313) is sequentially equipped with an O-ring (312), a buffer spring (311) and a pull claw (310).

2. The precision worm gear (2) hobbing device according to claim 1, characterized in that: The anti-rotation screw (32) is threaded to the inner side of the spring collet (34) near one end, and the other end abuts against the side of the ejector pin (31); the top of the ejector pin (31) abuts against the bottom of the precision worm gear (2), and the side of the pull claw (310) near the top engages with the side of the pull pin (39) located inside the base (314).

3. The precision worm gear (2) hobbing device according to claim 1, characterized in that: The connecting screw (36) at the bottom of the pull stud (39) is sequentially connected to the inner threads of the pull stud (39), the pull post (37), and the threaded sleeve (35); the connecting screw (36) at the top of the ejector seat (38) is sequentially connected to the inner threads of the ejector seat (38) and the base (314); the connecting screw (36) at the top of the base (314) is sequentially connected to the inner threads of the base (314) and the worktable (5).

4. The precision worm gear (2) hobbing device according to claim 1, characterized in that: The center plate (11), the workpiece pressure plate (12), the precision worm gear (2), the ejector pin (31), the tapered support sleeve (33), the spring collet (34), the threaded pull sleeve (35), the pull column (37), the ejector pin seat (38), the pull stud (39), the pull claw (310), the push-pull rod (313), and the base (314) are all coaxially arranged.

Images