Nut thread hob

Abstract

The utility model relates to the technical field of hobbing cutters, in particular to a nut thread hobbing cutter, which comprises a mounting plate, a cutter bar and a hobbing cutter head, the lower end of the mounting plate is provided with a mounting seat, the lower end of the mounting seat is provided with a mounting groove, the upper end of the cutter bar is provided with a mounting block, and the mounting block is positioned in the mounting groove. A limiting plate is mounted at the tail end of the cutter bar, a rectangular cutter shaft is arranged at the lower end of the limiting plate, a mounting shaft is mounted at the tail end of the rectangular cutter shaft, staggered second mounting holes are formed in the side end and the front end of the mounting shaft, the hob head is mounted on the outer side of the rectangular cutter shaft, and a rectangular through hole penetrating through the hob head is formed in the hob head. And positioning grooves distributed in an array mode are formed in the inner wall of the rectangular through hole, the rectangular cutter shaft is located in the rectangular through hole, and the mounting shaft extends to the position below the hobbing cutter head. The utility model has the advantages that the whole body and the tool bit are convenient to disassemble and assemble, and are convenient to replace after being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of hobs, in particular to a nut thread hob. Background Art

[0002] A hob is a gear machining tool with teeth arranged in a spiral line along a cylinder or cone. Hobs are mainly used to machine cylindrical gears, worm gears and other cylindrical toothed workpieces by the development method. During the machining process, the hob is equivalent to a helical gear with a large helical angle. The number of its teeth is the number of heads of the hob. The workpiece is equivalent to another helical gear. They mesh with each other in space like a pair of helical gears and rotate at a fixed speed ratio. The tooth profiles of the teeth in adjacent positions cut in sequence are enveloping the gear tooth profile.

[0003] A thread hob is required for processing nuts on sewing machines. Currently, the nut thread hob is composed of multiple components, and the cutter head is installed and fixed through a relatively complex installation structure. The installation operation is cumbersome, and it is not convenient to disassemble and replace the cutter head when it is damaged. Utility Model Content

[0004] The utility model aims to provide a nut thread rolling cutter, which has the advantages that the whole and the cutter head are easy to disassemble and assemble, and convenient to replace after damage, thereby solving the problems raised by the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a nut thread hob, comprising a mounting plate, a tool rod and a hob cutter head, the lower end of the mounting plate is provided with a mounting seat, the lower end of the mounting seat is provided with a mounting groove, the upper end of the tool rod is provided with a mounting block, the mounting block is located in the mounting groove, the end of the tool rod is provided with a limiting plate, the lower end of the limiting plate is provided with a rectangular tool shaft, the end of the rectangular tool shaft is provided with a mounting shaft, the side end and the front end of the mounting shaft are provided with staggered second mounting holes, the hob cutter head is installed on the outside of the rectangular tool shaft, a rectangular through hole penetrating the hob cutter head is provided on the hob cutter head, the inner wall of the rectangular through hole is provided with positioning grooves distributed in an array, the rectangular tool shaft is located in the rectangular through hole, and the mounting shaft extends to the bottom of the hob cutter head.

[0006] Preferably, corresponding first mounting holes are opened at the side ends of the mounting seat and the mounting block, mounting bolts are inserted into the first mounting holes, and nuts are threadedly mounted on the ends of the mounting bolts.

[0007] Preferably, the outer surface of the rectangular knife shaft is installed with positioning plates distributed in an array, the size of the positioning plates is adapted to the size of the positioning slots, and the positioning plates are located in the positioning slots.

[0008] Preferably, a limiting cap is sleeved and installed on the outer side of the end of the installation shaft. The limiting cap is rectangular in shape, and a circular hole matching the installation shaft is opened on the upper end of the limiting cap, and the installation shaft is located in the circular hole.

[0009] Preferably, threaded holes corresponding to the second mounting hole are formed at the front end and the side end of the limiting cap, and positioning screws are threadedly installed in the second mounting hole and the threaded hole.

[0010] Preferably, the limiting plate is arranged in a circular shape, and is located at the upper end of the hob cutter head.

[0011] Preferably, the mounting groove and the mounting block are both arranged in a rectangular shape, and the size of the mounting block is matched with the size of the mounting groove.

[0012] Preferably, the outer surface of the hob cutter head is provided with helically arranged teeth.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: when installing the tool rod, the mounting block is inserted into the mounting groove, and the tool rod can be installed by fitting the mounting bolts and nuts. When installing the hob cutter head, it is sleeved on the outside of the rectangular tool shaft, and then the limit cap is installed on the mounting shaft to complete the installation of the hob cutter head. The installation operation of multiple structures of the threaded hob is simple and quick, and when the hob cutter head and other structures are damaged, they can be easily disassembled and replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view structural schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0016] Figure 3 This is a schematic diagram of the cutter head structure of the utility model;

[0017] Figure 4 It is a partial front view structural schematic diagram of the utility model;

[0018] Figure 5 It is a partial bottom view structural schematic diagram of the utility model.

[0019] The reference numerals and names in the figures are as follows:

[0020] 101. Mounting plate; 102. Cutter bar; 103. Limiting plate; 104. Mounting seat; 105. Limiting cap; 106. Rectangular cutter shaft; 107. Positioning plate; 108. Mounting bolt; 109. Mounting groove; 110. Mounting block; 111. Mounting shaft; 201. Hob cutter head; 202. Rectangular through hole; 203. Positioning groove. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example

[0023] See also Figures 1 to 5 The utility model provides an embodiment: a nut thread hob, comprising:

[0024] The mounting plate 101, the cutter bar 102 and the hob cutter head 201, the lower end of the mounting plate 101 is provided with a mounting seat 104, the lower end of the mounting seat 104 is provided with a mounting groove 109, the upper end of the cutter bar 102 is provided with a mounting block 110, the mounting block 110 is located in the mounting groove 109, the end of the cutter bar 102 is provided with a limit plate 103, the lower end of the limit plate 103 is provided with a rectangular cutter shaft 106, the end of the rectangular cutter shaft 106 is provided with The mounting shaft 111 has a second mounting hole arranged staggered at the side end and the front end thereof, the hob cutter head 201 is mounted on the outside of the rectangular cutter shaft 106, a rectangular through hole 202 penetrating the hob cutter head 201 is provided on the hob cutter head 201, the inner wall of the rectangular through hole 202 has positioning grooves 203 distributed in an array, the rectangular cutter shaft 106 is located in the rectangular through hole 202, and the mounting shaft 111 extends to the bottom of the hob cutter head 201.

[0025] In this embodiment, when the tool rod 102 is installed, the mounting block 110 is inserted into the mounting groove 109, and the tool rod 102 can be installed by the cooperation of the mounting bolts 108 and the nuts. When the hob cutter head 201 is installed, it is sleeved on the outside of the rectangular tool shaft 106, and the hob cutter head 201 can be limited once by the cooperation of the rectangular through hole 202 and the rectangular tool shaft 106. The hob cutter head 201 can be limited for a second time by the cooperation of the positioning plate 107 and the positioning groove 203. Finally, the limiting cap 105 is installed on the mounting shaft 111, and the limiting cap 105 is installed by the positioning screw to complete the assembly of the hob.

[0026] Furthermore,

[0027] The side ends of the mounting seat 104 and the mounting block 110 are provided with corresponding first mounting holes, in which mounting bolts 108 are inserted, and nuts are threadedly installed at the ends of the mounting bolts 108. The first mounting holes are provided to cooperate with the mounting bolts 108 and nuts to mount and connect the mounting block 110 to the mounting seat 104.

[0028] Furthermore,

[0029] The outer surface of the rectangular cutter shaft 106 is provided with positioning plates 107 distributed in an array, the size of the positioning plates 107 matches the size of the positioning slots 203, and the positioning plates 107 are located in the positioning slots 203. The positioning plates 107 and the positioning slots 203 can limit the position of the hob cutter head 201.

[0030] Furthermore,

[0031] A limiting cap 105 is sleeved and installed on the outer side of the end of the installation shaft 111. The limiting cap 105 is rectangular in shape. A circular hole matching the installation shaft 111 is opened on the upper end of the limiting cap 105, and the installation shaft 111 is located in the circular hole.

[0032] Furthermore,

[0033] The front end and side end of the limiting cap 105 are provided with threaded holes corresponding to the second mounting hole, and the second mounting hole and the threaded hole are threadedly installed with positioning screws. The threaded hole and the second mounting hole are provided with the positioning screws to install the limiting cap 105, and the lower end of the hob cutter head 201 can be limited by the limiting cap 105.

[0034] Furthermore,

[0035] The limiting plate 103 is arranged in a circular shape and is located at the upper end of the hob cutter head 201. The setting of the limiting plate 103 can limit the upper end of the hob cutter head 201.

[0036] Furthermore,

[0037] The mounting groove 109 and the mounting block 110 are both rectangular in shape, and the size of the mounting block 110 matches the size of the mounting groove 109 .

[0038] Furthermore,

[0039] The outer surface of the hob cutter head 201 is provided with spirally arranged cutting teeth.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A nut thread hob, comprising a mounting plate (101), a cutter bar (102) and a hob cutter head (201), characterized in that: The lower end of the mounting plate (101) is provided with a mounting seat (104), the lower end of the mounting seat (104) is provided with a mounting groove (109), the upper end of the knife rod (102) is provided with a mounting block (110), the mounting block (110) is located in the mounting groove (109), the end of the knife rod (102) is provided with a limiting plate (103), the lower end of the limiting plate (103) is provided with a rectangular knife shaft (106), the end of the rectangular knife shaft (106) is provided with a mounting shaft (111), and the mounting plate (103) is provided with a mounting plate (104). The side end and the front end of the mounting shaft (111) are provided with second mounting holes which are arranged in a staggered manner. The hob cutter head (201) is mounted on the outside of the rectangular cutter shaft (106). The hob cutter head (201) is provided with a rectangular through hole (202) which penetrates the hob cutter head (201). The inner wall of the rectangular through hole (202) is provided with positioning grooves (203) which are distributed in an array. The rectangular cutter shaft (106) is located in the rectangular through hole (202), and the mounting shaft (111) extends to the bottom of the hob cutter head (201).

2. A nut thread hob according to claim 1, characterized in that: The side ends of the mounting seat (104) and the mounting block (110) are provided with corresponding first mounting holes, a mounting bolt (108) is inserted into the first mounting hole, and a nut is threadedly mounted on the end of the mounting bolt (108).

3. A nut thread hob according to claim 1, characterized in that: The outer surface of the rectangular knife shaft (106) is provided with positioning plates (107) distributed in an array, the size of the positioning plates (107) is adapted to the size of the positioning groove (203), and the positioning plates (107) are located in the positioning groove (203).

4. A nut thread hob according to claim 1, characterized in that: A limiting cap (105) is sleeved and installed on the outer side of the end of the installation shaft (111); the limiting cap (105) is arranged in a rectangular shape; a circular hole matching the installation shaft (111) is opened at the upper end of the limiting cap (105); and the installation shaft (111) is located in the circular hole.

5. A nut thread hob according to claim 4, characterized in that: The front end and the side end of the limiting cap (105) are provided with threaded holes corresponding to the second mounting hole, and the second mounting hole and the threaded hole are internally threaded with positioning screw pins.

6. A nut thread hob according to claim 1, characterized in that: The limiting plate (103) is arranged in a circular shape, and the limiting plate (103) is located at the upper end of the hob cutter head (201).

7. A nut thread hob according to claim 1, characterized in that: The installation groove (109) and the installation block (110) are both arranged in a rectangular shape, and the size of the installation block (110) is adapted to the size of the installation groove (109).

8. The nut thread hob according to claim 1, characterized in that: The outer surface of the hob cutter head (201) is provided with helically arranged cutter teeth.

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