Screwdriver head fixing device

Abstract

The utility model belongs to the technical field of tool equipment, and particularly relates to a screwdriver head fixing device which comprises a seat body, an inserting hole is formed in the seat body, a tail gap limiting groove is formed in the bottom face of the inserting hole, and lug clamping grooves extending in the axial direction of the inserting hole are formed in the two opposite sides of a port respectively. A limiting structure is arranged on the side, away from the end opening of the inserting hole, of the base body, and the sliding sleeve is installed on the outer side of the base body in a sliding mode, the check ring structure is arranged on the side, away from the limiting structure, of the sliding sleeve, and the limiting balls are limited between the sliding sleeve and the base body and arranged in the circumferential direction of the base body at intervals. Mounting holes are formed in the positions, corresponding to the limiting balls, of the seat body, and a pushing structure used for pushing the limiting balls to penetrate out of the mounting holes to be inserted into the inserting holes is arranged on the inner side wall of the sliding sleeve. According to the screwdriver blade fixing base, the tail-missing type screwdriver blade and the double-lug type screwdriver blade can be fixedly installed, the problem that an existing screwdriver blade fixing base cannot be compatible with the tail-missing type screwdriver blade and the double-lug type screwdriver blade is solved, and using is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooling equipment, and in particular relates to a screwdriver head fixing device. Background Art

[0002] At present, many screwdrivers and electric screwdrivers are commonly used tools for tightening or loosening screws. In order to facilitate the operation of screws of different types, the screwdriver heads on the screwdrivers and electric screwdrivers can be replaced.

[0003] Existing screwdriver heads are mainly divided into tail-notch type screwdriver heads and double-ear type screwdriver heads. Among them, the tail-notch type screwdriver head is limited by the cooperation between the tail of the screwdriver head and the limiting groove at the bottom of the insertion hole on the fixed base, and the double-ear type screwdriver head is limited by the cooperation between the ears on both sides and the grooves on both sides of the insertion hole on the fixed base. The two are not interchangeable, resulting in inconvenience in use. Utility Model Content

[0004] The utility model aims to provide a screwdriver bit fixing device, aiming to solve the problem that the existing screwdriver bit fixing seat is not compatible with the tail-notch type screwdriver bit and the double-ear type screwdriver bit, and is more convenient to use.

[0005] The utility model discloses a screwdriver head fixing device, which includes a seat body, an insertion hole is provided on the seat body, a tail notch limit groove is provided on the bottom surface of the insertion hole, ear grooves extending along the axial direction of the insertion hole are respectively provided on the opposite sides of the port of the insertion hole, a limit structure is provided on the side of the seat body away from the port of the insertion hole, and also includes a sliding sleeve slidably installed on the outer side of the seat body, a retaining ring structure arranged on the side of the sliding sleeve away from the limiting structure and fixedly installed on the seat body, an elastic telescopic structure arranged between the limiting structure and the sliding sleeve, and at least two limiting balls defined between the sliding sleeve and the seat body, at least two limiting balls are arranged at intervals along the circumference of the seat body, mounting holes are respectively provided on the seat body corresponding to each of the limiting balls, and a pushing structure for pushing the limiting ball to pass through the mounting hole and insert into the insertion hole is provided on the inner side wall of the sliding sleeve.

[0006] As an improvement, a pushing structure is provided at each of the limiting balls.

[0007] As an improvement, the sliding sleeve is configured as an elastic cylinder, and the pushing structure is a protrusion disposed on the inner wall of the elastic cylinder.

[0008] As an improvement, the protrusion is connected to the elastic cylinder as an integral structure.

[0009] As an improvement, the pushing structure includes a sliding groove arranged on the inner wall of the sliding sleeve along the sliding direction of the sliding sleeve, one end of the sliding groove corresponding to the port of the insertion hole is set as an open end, and one end of the sliding groove away from the port of the insertion hole is set as an inclined surface.

[0010] As an improvement, two limiting balls are provided, which are respectively arranged on opposite sides of the seat body; or, three limiting balls are provided, and the three limiting balls are evenly distributed along the circumference of the seat body.

[0011] As an improvement, the elastic telescopic structure is a spring sleeved on the seat between the sliding sleeve and the limiting structure.

[0012] As an improvement, the diameter of the inner port of the mounting hole close to the insertion hole is smaller than the diameter of the outer port of the mounting hole on the side corresponding to the inner wall of the sliding sleeve, and the diameter of the inner port of the mounting hole is smaller than the diameter of the limiting ball; or, the mounting hole is set as a straight hole, and a limiting ring is provided at the inner port of the straight hole close to the insertion hole.

[0013] As an improvement, the limiting structure is a convex ring protruding from the seat body.

[0014] As an improvement, the convex ring and the seat body are connected to form an integral structure.

[0015] Due to the adoption of the above-mentioned technical scheme, the screwdriver head fixing device of the utility model includes a seat body, an insertion hole is provided on the seat body, a tail notch limit groove is provided on the bottom surface of the insertion hole, ear slots extending along the axial direction of the insertion hole are respectively provided on the opposite sides of the port of the insertion hole, a limit structure is provided on the side of the seat body away from the port of the insertion hole, and also includes a sliding sleeve slidably installed on the outside of the seat body, a retaining ring structure arranged on the side of the sliding sleeve away from the limiting structure and fixedly installed on the seat body, an elastic telescopic structure arranged between the limiting structure and the sliding sleeve, and at least two limiting balls limited between the sliding sleeve and the seat body, at least two limiting balls are arranged at intervals along the circumference of the seat body, and mounting holes are respectively provided on the seat body corresponding to each limiting ball, and a pushing structure for pushing the limiting ball to pass through the mounting hole and insert into the insertion hole is provided on the inner side wall of the sliding sleeve.

[0016] During installation, the sleeve is first slid toward the side close to the limiting structure. When the sleeve slides, the elastic telescopic structure is compressed, and the limitation of the limiting ball on the pushing structure of the inner side wall of the sleeve disappears, so that the limiting ball can move freely at the installation hole. Then the screwdriver head is inserted into the insertion hole, and then the sleeve is loosened. Under the elastic force of the elastic telescopic structure, the sleeve is pushed to slide toward the side away from the limiting structure. The pushing structure of the inner side wall of the sleeve pushes the limiting ball to pass through the installation hole, insert into the insertion hole and get stuck into the annular groove on the screwdriver head, so that the screwdriver head is fixedly installed in the insertion hole. Not only the tail-notch type screwdriver head can be fixedly installed, but also the double-ear type screwdriver head can be fixedly installed. The screwdriver head fixing device of the utility model solves the problem that the existing screwdriver head fixing seat is not compatible with the tail-notch type screwdriver head and the double-ear type screwdriver head, and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional structural schematic diagram of a screwdriver bit fixing device according to a first embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional structural schematic diagram of a screwdriver bit fixing device according to a first embodiment of the utility model;

[0019] Among them, 10, seat body; 11, insertion hole; 12, tail notch limit groove; 13, ear slot; 14, limit structure; 15, mounting hole; 20, sliding sleeve; 21, protrusion; 22, sliding groove; 23, inclined surface; 30, retaining ring structure; 40, elastic telescopic structure; 50, limit ball. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] Figure 1 and Figure 2 It is a structural schematic diagram of the screwdriver head fixing device of the utility model, wherein: Figure 1 The cross-sectional structure diagram of the screwdriver head fixing device of the first embodiment of the utility model is shown. Figure 2 The cross-sectional structure diagram of the screwdriver bit fixing device of the first embodiment of the utility model is shown. For the convenience of description, only the parts related to the utility model are shown in the figure.

[0022] Depend on Figure 1 and Figure 2It can be seen that the screwdriver head fixing device of the utility model includes a base body 10, an insertion hole 11 is provided on the base body 10, a tail notch limiting groove 12 is provided on the bottom surface of the insertion hole 11, ear slots 13 extending along the axial direction of the insertion hole 11 are respectively provided on the opposite sides of the port of the insertion hole 11, a limiting structure 14 is provided on the side of the base body 10 away from the port of the insertion hole 11, and also includes a sliding sleeve 20 slidably installed on the outside of the base body 10, and a sliding sleeve 20 is provided on the side of the sliding sleeve 20 away from the limiting structure 14 and A retaining ring structure 30 is fixedly installed on the seat body 10, an elastic telescopic structure 40 is arranged between the limiting structure 14 and the sliding sleeve 20, and at least two limiting balls 50 are defined between the sliding sleeve 20 and the seat body 10. At least two limiting balls 50 are arranged at intervals along the circumference of the seat body 10, and a mounting hole 15 is respectively provided on the seat body 10 corresponding to each limiting ball 50, and a pushing structure is provided on the inner wall of the sliding sleeve 20 for pushing the limiting ball 50 to pass through the mounting hole 15 and insert into the insertion hole 11.

[0023] During installation, first slide the sleeve 20 toward the side close to the limiting structure 14. When the sleeve 20 slides, the elastic telescopic structure 40 is compressed, and the limit of the limiting ball 50 by the pushing structure of the inner wall of the sleeve 20 disappears, and the limiting ball 50 can move freely at the installation hole 15. Then insert the screwdriver head into the insertion hole 11. For the tail-notch type screwdriver head, the tail of the screwdriver head is inserted into the tail-notch limiting groove 12. For the double-ear type screwdriver head, the ears on both sides are respectively inserted into the ear slots 13 on the opposite sides of the port of the insertion hole 11. Then loosen the sleeve 20. Under the elastic force of the elastic telescopic structure 40, the sliding sleeve 20 is pushed to slide to the side away from the limiting structure 14, and the pushing structure of the inner wall of the sliding sleeve 20 pushes the limiting ball 50 to pass through the mounting hole 15, insert into the insertion hole 11 and get stuck into the annular groove on the screwdriver head, so that the screwdriver head is fixedly installed in the insertion hole 11. Not only can the tail-notched screwdriver head be fixedly installed, but also the double-ear screwdriver head can be fixedly installed. The screwdriver head fixing device of the utility model solves the problem that the existing screwdriver head fixing seat is not compatible with the tail-notched screwdriver head and the double-ear screwdriver head, and is more convenient to use.

[0024] In the present utility model, in order to facilitate pushing the limiting ball 50 out of the mounting hole 15 and inserting into the insertion hole 11 , a pushing structure is respectively provided at each limiting ball 50 .

[0025] in, Figure 1 The specific structure of the first embodiment of the screwdriver bit fixing device of the utility model is shown. The sliding sleeve 20 of the screwdriver bit fixing device is set as an elastic cylinder, and the pushing structure is a protrusion 21 set on the inner wall of the elastic cylinder, and the limiting ball 50 is pushed to move by the protrusion 21. Specifically, the protrusion 21 is connected to the elastic cylinder as an integrated structure.

[0026] Figure 2The specific structure of the second embodiment of the screwdriver head fixing device of the utility model is shown. The structure of this embodiment is basically the same as that of the first embodiment, and the difference is that the pushing structure includes a slide groove 22 arranged on the inner wall of the slide sleeve 20 along the sliding direction of the slide sleeve 20, and one end of the slide groove 22 corresponding to the port of the insertion hole 11 is set as an open end, and one end of the slide groove 22 away from the port of the insertion hole 11 is set as an inclined surface 23, and the limit ball 50 is pushed to move by the size change of the inclined surface 23 in the radial direction.

[0027] Usually, two limiting balls 50 are provided, which are respectively arranged at opposite sides of the seat body 10 ; of course, three limiting balls 50 are provided, and the three limiting balls 50 are evenly distributed along the circumference of the seat body 10 .

[0028] In the present invention, the port diameter of the mounting hole 15 corresponding to the insertion hole 11 is smaller than the port diameter of the mounting hole 15 corresponding to the inner wall of the sliding sleeve 20, and the port diameter of the mounting hole 15 corresponding to the insertion hole 11 is smaller than the diameter of the limiting ball 50.

[0029] Of course, the mounting hole 15 can also be set as a straight hole, and a limiting ring is provided at the inner end of the straight hole close to the insertion hole 11 to block the limiting ball 50.

[0030] In the present invention, the limiting structure 14 is a convex ring protruding from the seat body 10 . Usually, the convex ring and the seat body 10 are connected to form an integrated structure.

[0031] In some other embodiments, the limiting structure 14 and the seat body 10 are separate structures, an external threaded portion is correspondingly provided on the seat body 10, and the limiting structure 14 is a nut matched with the external threaded portion.

[0032] In the present invention, the elastic telescopic structure 40 is configured as a spring sleeved on the seat body 10 between the sliding sleeve 20 and the limiting structure 14 .

[0033] Of course, the elastic telescopic structure 40 may also be an elastic sleeve.

[0034] In the present invention, an annular groove is provided on the outer peripheral side of the end of the seat body 10 away from the limiting structure 14, and the retaining ring structure 30 is a retaining spring clamped in the annular groove.

[0035] In some other embodiments, an external threaded portion is provided on the outer peripheral side of the end of the seat body 10 away from the limiting structure 14, and the retaining ring structure 30 is a nut.

[0036] The above descriptions are only some embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A screwdriver bit fixing device, characterized in that: The invention comprises a seat body, an insertion hole is provided on the seat body, a tail notch limit groove is provided on the bottom surface of the insertion hole, ear grooves extending along the axial direction of the insertion hole are respectively provided on the opposite sides of the port of the insertion hole, a limit structure is provided on the side of the seat body away from the port of the insertion hole, and also comprises a sliding sleeve slidably installed on the outside of the seat body, a retaining ring structure arranged on the side of the sliding sleeve away from the limiting structure and fixedly installed on the seat body, an elastic telescopic structure arranged between the limiting structure and the sliding sleeve, and at least two limit balls defined between the sliding sleeve and the seat body, at least two of the limit balls are arranged at intervals along the circumference of the seat body, mounting holes are respectively provided on the seat body corresponding to each of the limit balls, and a pushing structure for pushing the limit ball through the mounting hole and inserted into the insertion hole is provided on the inner side wall of the sliding sleeve.

2. The screwdriver bit fixing device according to claim 1, characterized in that: A pushing structure is respectively provided corresponding to each of the limiting balls.

3. The screwdriver bit fixing device according to claim 2, characterized in that: The sliding sleeve is configured as an elastic cylinder, and the pushing structure is a protrusion configured on the inner wall of the elastic cylinder.

4. The screwdriver bit fixing device according to claim 3, characterized in that: The protrusion is connected to the elastic cylinder to form an integrated structure.

5. The screwdriver bit fixing device according to claim 2, characterized in that: The pushing structure includes a sliding groove arranged on the inner side wall of the sliding sleeve along the sliding direction of the sliding sleeve, one end of the sliding groove corresponding to the port of the insertion hole is arranged as an open end, and one end of the sliding groove away from the port of the insertion hole is arranged as an inclined surface.

6. The screwdriver bit fixing device according to claim 1, characterized in that: There are two limiting balls, which are respectively arranged at two opposite sides of the seat body; or, there are three limiting balls, which are evenly distributed along the circumference of the seat body.

7. The screwdriver bit fixing device according to claim 1, characterized in that: The elastic telescopic structure is a spring sleeved on the seat body between the sliding sleeve and the limiting structure.

8. The screwdriver bit fixing device according to claim 1, characterized in that: The diameter of the inner port of the mounting hole close to the insertion hole is smaller than the diameter of the outer port of the mounting hole corresponding to the inner wall of the sleeve, and the diameter of the inner port of the mounting hole is smaller than the diameter of the limiting ball; or, the mounting hole is set as a straight hole, and a limiting ring is provided at the inner port of the straight hole close to the insertion hole.

9. The screwdriver bit fixing device according to any one of claims 1 to 8, characterized in that: The limiting structure is a convex ring protruding from the seat body.

10. The screwdriver bit fixing device according to claim 9, characterized in that: The convex ring and the seat body are connected to form an integral structure.

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