WO2019205392A1

WO2019205392A1 - File

Info

Publication number: WO2019205392A1
Application number: PCT/CN2018/102463
Authority: WO
Inventors: 闵航; 刘少江; 阮炯
Original assignee: 上海西美工具进出口有限公司
Priority date: 2018-04-23
Filing date: 2018-08-27
Publication date: 2019-10-31
Also published as: CN208147033U

Abstract

A file, comprising: a handle (200), at least one file assembly (100), and a fixing end cap (300). The file assembly (100) comprises a file head (110) and a connecting member (120); the front end of the file head (110) is a work surface (111) having file teeth, and the rear end is a connecting handle (112); the front end of the connecting member (120) is provided with a connecting hole (121), and the rear end is provided with connecting external threads (123); the connecting handle (112) of the file head (110) is inserted into the connecting hole (121) of the connecting member (120), and the file head (110) and the connecting member (120) are fixedly connected; the handle (200) is provided with a center hole (201), the connecting member (120) is inserted into the front end of the center hole (201) of the handle (200), and the connecting external threads (123) of the connecting member (120) are exposed out of the rear end of the handle (200); the fixing end cap (300) is provided with internal threads (301), and the internal threads (301) mesh with the connecting external threads (123) of the connecting member (120). The file head (110) of the file can be replaced, and the volume and weight of a carried tool can be reduced.

Description

Sickle

The present application claims priority to Chinese Patent Application No. 20112058 205 2.8, filed on Apr. 23, 2018, the entire disclosure of which is hereby incorporated by reference.

Technical field

The utility model relates to the technical field of boring tools, in particular to a boring tool which can replace a boring head.

Background technique

Scythe is a common tool. The boring head has many models, and it is very inconvenient to carry large and heavy.

Summary of the invention

The utility model provides a file which can replace the boring head, reduce the volume and weight of the carrying tool, and solve the prior art problems to overcome the defects of the prior art.

The utility model provides a file, comprising: a handle, at least one boring tool assembly and a fixed end cover; the boring tool assembly comprises a boring head and a connecting piece; the front end of the boring head is a working surface with a dent, the rear end is a connecting handle; the connecting piece The front end has a connecting hole, and the rear end has a connecting external thread; the connecting handle of the boring head is inserted into the connecting hole of the connecting piece, the boring head and the connecting piece are fixedly connected; the handle has a central hole, and the connecting piece is inserted into the front end of the central hole of the handle, and is connected The connecting external thread of the piece is exposed at the rear end of the handle; the fixed end cap has an internal thread, and the internal thread is engaged with the external thread of the connecting piece.

Further, the present invention provides a boring tool, which may further have a feature that the outer circumference of the connecting member has a plurality of axially extending ribs; the central hole of the handle has a plurality of axial grooves on the circumference; The ribs are matched with the axial grooves, and the ribs are embedded in the axial grooves.

Further, the utility model provides a file, which can also have the following features: the rear end of the handle has an external thread of the handle, the external thread of the handle is consistent with the thread connecting the external thread; the axial groove penetrates the external thread of the handle; The connecting member is inserted into the central hole of the handle, and the external thread is inserted into the axial groove, and the external thread of the handle is combined with the external thread to form a complete external thread; the internal thread is engaged with the external thread and the external thread of the handle.

Further, the present invention provides a file, which may also have the feature that each of the axial grooves is evenly distributed in the circumferential direction.

Further, the present invention provides a file, which may also have the following features: two axial grooves, one-line shape; or four axial grooves, which are cross-shaped.

Further, the present invention provides a boring tool, which may also have the feature that the connecting shank of the boring head and the connecting hole of the connecting member have an interference fit to achieve a fixed connection.

Further, the present invention provides a file, and may also have the feature that the connecting handle of the boring head is wedge-shaped.

Further, the present invention provides a file, which may also have the feature that the connecting member is a plastic material and is thermoplastic on the boring head.

Further, the present invention provides a file, and may also have the feature that the working surface of the boring head and the connecting handle have a shoulder; the shoulder is attached to the front end of the handle.

Further, the present invention provides a file, and may also have the feature that the file head in each file assembly is any one of a flat file, a semi-circular file, a triangular file, a square file, and a round file.

The utility model also provides a boring tool, comprising: a handle, at least one boring tool assembly and a fixed end cover; the boring tool assembly comprises a boring head and a connecting piece; the front end of the boring head is a working surface with a dent, and the rear end is The connecting handle has a connecting hole at the front end and a connecting external thread at the rear end; the connecting handle of the boring head is inserted into the connecting hole of the connecting piece, the boring head and the connecting piece are fixedly connected; the handle has a central hole, and the connecting piece is inserted into the central hole of the handle The front end, and the connecting external thread of the connecting member is exposed at the rear end of the handle; the fixed end cap has an internal thread, and the internal thread is engaged with the external thread of the connecting piece.

DRAWINGS

Fig. 1 is a perspective view of a trowel of the first embodiment.

Figure 2 is an exploded view of the file in the first embodiment.

Figure 3 is an enlarged view showing the connection position of the connecting member and the handle in the first embodiment.

Figure 4 is an exploded view of the file in the second embodiment.

Figure 5 is an enlarged view showing the connection position of the connecting member and the handle in the second embodiment.

Figure 6 is a perspective view of a file in the third embodiment.

Figure 7 is an exploded view of the file in the third embodiment.

Figure 8 is an enlarged view showing the connection position of the three connecting members and the handle of the embodiment.

detailed description

The present invention will be further described below in conjunction with the drawings and specific embodiments.

Embodiment 1

Fig. 1 is a perspective view of a trowel of the first embodiment.

As shown in FIG. 1, in the present embodiment, the file includes: a file assembly 100, a handle 200, and a fixed end cover 300. The file assembly 100 can be provided in plurality as needed.

Figure 2 is an exploded view of the file in the first embodiment.

As shown in FIG. 2, the file assembly 100 includes a boring head 110 and a connector 120. The front end of the boring head 110 is a working surface 111 having a serration, the rear end is a connecting handle 112, and a shoulder 113 is provided between the working surface 111 and the connecting shank 112. When the plurality of boring head assemblies 100 are disposed, each of the boring heads 111 may be a flat boring, a semicircular cymbal, a triangular cymbal, a square cymbal, or a round cymbal; or a boring head of the same shape, but having different sizes. The connecting handle 112 of the boring head 110 is wedge-shaped for convenient connection with the connecting member 120.

Herein, the descriptions of the "front", "rear" and the like indicating the orientation or positional relationship are based on the orientation and positional relationship in FIG. 2, and in FIG. 2, the up and down direction is the front and rear direction, wherein the lower side is The direction is the front and the upper direction is the rear; for any part, the lower end can be called the front end, and the upper end can be called the rear end or the tail end.

The front end of the connecting member 120 has a connecting hole 121, and the rear end has a connecting external thread 123. The connecting handle 112 of the boring head 110 is inserted into the connecting hole 121 of the connecting member 120, and the boring head 110 and the connecting member 120 can be fixedly connected by an interference fit. In this embodiment, the connecting member 120 is a plastic material and is thermoplastically formed on the boring head 110 to achieve a fixed connection between the two as an integral component.

The connecting external thread 123 at the rear end of the connecting member 120 is not a complete circumferential thread. The connecting member 120 has two protruding ribs 122 extending in the axial direction on the circumference, and the connecting external thread 123 is disposed on the two protruding ribs 123. The position of the two raised ribs 122 matches the axial groove 203 of the handle 200. The thread connecting the external thread 123 and the external thread 202 of the handle are identical, that is, the nominal diameter, the number of teeth, and the pitch are the same.

As shown in Figures 2 and 3, the handle 200 has a central bore 201 with a distal end (i.e., the rear end) having a handle external thread 202. The external thread 202 of the handle coincides with the thread connecting both the external threads 123. The external thread 202 of the handle has two axial grooves 203, and the two axial grooves 203 are uniformly arranged in a line shape in the circumferential direction, that is, the two axial grooves 203 are disposed in the same radial direction. The two axial grooves 203 extend downwardly to the central opening 201 of the handle 200, that is to say also have two axial grooves 203 on the circumference of the central opening 201. The position and size of the axial groove 203 and the raised rib 122 match. Of course, the number of the axial grooves 203 and the protruding ribs 122 may be four, which is a cross shape.

The connecting member 120 can be inserted into the central hole 201 of the handle 200 from the front to the rear such that the connecting external thread 123 is embedded in the axial groove 203, and the external thread 123 of the handle and the connecting external thread 202 are combined to form a complete external thread.

The fixed end cap 300 has an internal thread 301 that simultaneously engages the external thread 123 and the external thread 202 of the handle.

The boring tool assembly 100 replacement process:

The fixed end cap 300 is rotated and removed from the connecting external thread 123 of the connector 120 and the handle external thread 202 of the handle 200. The file assembly 100 as a whole is taken out from the center hole 201 of the handle 200.

Another type of trowel assembly 100 is replaced and inserted into the center hole 201 of the handle 200. The shoulder 113 of the boring head 110 of the boring tool assembly 100 is fitted to the front end surface of the handle 200, and the connecting external thread 123 of the connecting member 120 is embedded in the handle 200. The axial groove 203 is inside; the external thread 123 of the handle and the external thread 202 are combined to form a complete external thread. The internal thread 301 of the fixed end cap 300 is simultaneously engaged with the connecting external thread 123 and the external thread 202 of the handle to achieve fixation and complete replacement.

Embodiment 2

In this embodiment, except that the threads of the connecting member 120 and the handle 200 are different from those in the first embodiment, the structures and working principles of the other components are the same, and the description will not be repeated.

Figure 4 is an exploded view of the file in the second embodiment.

In the embodiment shown in FIG. 4 and FIG. 5, the tail end (ie, the rear end) of the handle 200 is not provided with the external thread 202 of the handle, and the connecting external thread 123 at the rear end of the connecting member 120 is a circumferentially complete thread. The connecting member 120 of the boring tool assembly 100 is inserted into the central hole 201 of the handle 200, and the two protruding ribs 122 are embedded in the two axial grooves 203 for circumferential positioning to prevent the connecting member 120 from rotating within the handle 200. The connecting external thread 123 is exposed from the rear end (ie, the rear end) of the handle 200, and the internal thread 301 of the fixed end cap 300 is only engaged with the connecting external thread 123 to complete the fixing of the file assembly 100.

Embodiment 3

In this embodiment, except that the connection structure of the connecting member 120 and the handle 200 and the fixed end cover 300 is different from that of the first embodiment, the structures and working principles of the other components are the same, and are not described herein.

Figure 6 is a perspective view of a file in the third embodiment.

Figure 7 is an exploded view of the file in the third embodiment.

As shown in FIG. 6-8, in the embodiment, the connecting member 120 of the handle 200 and the connecting external thread 123 at the trailing end thereof may not be completely exposed at the rear end of the handle 200, that is, the connecting external thread 123 may be partially or completely. The end of the fixed end cover 300 facing the handle 200 may have a convex portion having an internal thread 301. After the installation is completed, the convex portion may be inserted into the tail end of the center hole 201 and connected with the connecting member 121. The connecting external threads 123 are engaged to complete the fixing of the trowel assembly 100.

In addition, the outer circumference of the connecting member 120 may not be provided with the protruding ribs 122. The inner wall of the central hole 201 of the handle 200 may not be provided with the axial groove 203, but may be matched with the central hole 201 by the outer shape of the connecting member 120 to limit The relative rotation of the connector 120 with the handle 200. As shown in FIG. 7, the connecting member 120 is not provided with a portion connecting the external thread 123. For convenience of description, it may be referred to as a connecting portion, and the connecting portion may have a non-circular cross section, such as an elliptical shape, a waist shape, and a drum shape. Or a square or the like. Correspondingly, the matching portion of the central hole 201 and the connecting portion may also be a matching non-circular hole so that the connecting member 120 can be inserted into the central hole 201 and can be mutually elbowed by the matching of the shapes. To limit relative rotation. Of course, even in the form of the connector 120 and the handle 200 of this type, the outer wall of the connector 120 and the inner wall of the center hole 201 may be provided with the aforementioned rib 122 and the axial groove 203 to further enhance the anti-rotation effect.

Claims

A sickle comprising: a handle, at least one file assembly and a fixed end cover;

Wherein the boring tool assembly comprises a boring head and a connecting member;

The front end of the boring head is a working surface having a molar, and the rear end is a connecting handle;

The front end of the connecting member has a connecting hole, and the rear end has a connecting external thread;

The connecting handle of the boring head is inserted into the connecting hole of the connecting member, and the boring head and the connecting member are fixedly connected;

The handle has a central hole, the connecting member is inserted into the front end of the central hole of the handle, and the connecting external thread of the connecting member is exposed at the rear end of the handle;

The fixed end cap has an internal thread that engages the external thread of the connection of the connector.
The trowel of claim 1 wherein:

Wherein, the outer circumference of the connecting member has a plurality of protruding ribs extending in the axial direction;

The central hole of the handle has a plurality of axial grooves on the circumference thereof;

The raised ribs are mated with the axial grooves, and the raised ribs are embedded in the axial grooves.
The file according to claim 2, wherein:

Wherein, the rear end of the handle has an external thread of the handle, and the external thread of the handle is consistent with the thread connecting the external thread;

The axial groove runs through the external thread of the handle;

The connecting external thread is disposed on the protruding rib;

The connecting member is inserted into the central hole of the handle, the connecting external thread is embedded in the axial groove, and the external thread of the handle and the external thread of the connecting joint form a complete external thread;

The internal thread is simultaneously meshed with the external thread of the connection and the external thread of the handle.
The file according to claim 2, wherein:

Wherein each of the axial grooves is evenly distributed in the circumferential direction.
The file according to claim 4, wherein:

Wherein, the axial grooves are two in a shape;

Or the axial grooves are four and have a cross shape.
The trowel of claim 1 wherein:

Wherein, the connecting handle of the boring head and the connecting hole of the connecting member are in an interference fit to achieve a fixed connection.
The trowel of claim 1 wherein:

Wherein, the connecting handle of the boring head is wedge-shaped.
The trowel of claim 1 wherein:

Wherein, the connecting member is a plastic material and is thermoplastic on the boring head.
The trowel of claim 1 wherein:

Wherein the working face of the boring head and the connecting handle have a shoulder;

The shoulder fits the front end face of the handle.
The trowel of claim 1 wherein:

Wherein, the boring head in each of the boring tool assemblies is any one of a flat cymbal, a semicircular cymbal, a triangular cymbal, a square cymbal, and a round cymbal.
A sickle comprising: a handle, at least one file assembly and a fixed end cover;

Wherein the boring tool assembly comprises a boring head and a connecting member;

The front end of the boring head is a working surface having a molar, and the rear end is a connecting handle;

The front end of the connecting member has a connecting hole, and the rear end has a connecting external thread;

The connecting handle of the boring head is inserted into the connecting hole of the connecting member, and the boring head and the connecting member are fixedly connected;

The handle has a central hole, the connecting member is inserted into the front end of the central hole of the handle, and the connecting external thread of the connecting member is exposed at a rear end of the handle;

The fixed end cap has an internal thread that engages the external thread of the connection of the connector.