Size-adjustable screw tap sleeve

Abstract

According to the size-adjustable screw tap sleeve, a sleeve body and a clamping structure are arranged, and the sleeve body comprises a cylindrical end and a conical cylinder end with the smooth inner wall; the clamping structure comprises a columnar base and movable clamping jaws, external threads are formed in the outer end face of the columnar base, the multiple movable clamping jaws are arranged at intervals and rotationally arranged on the clamping part, and the movable clamping jaws are correspondingly buckled to form a limiting clamping opening; during installation, the movable clamping jaw is connected with the columnar base through the pin shaft, and the movable clamping jaw can freely rotate along the pin shaft. The cylindrical base is in threaded fit with the barrel, the depth of the cylindrical base screwed into the barrel is adjusted by rotating the barrel, when the cylindrical base is screwed into the barrel by a certain depth, the movable clamping jaw is extruded by the conical barrel end of the barrel to shrink, the deeper the screwing depth is, the tighter the movable clamping jaw shrinks, a proper screw tap can be selected according to operation conditions, and the sleeve is adjusted to be matched with the screw tap. And finally, the locking ring is used for limiting and fixing the cylinder body to meet the requirements of different hole diameters.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal cutting, in particular to a tap sleeve with adjustable size. Background Art

[0002] The existing tap sleeves are fixed-model sleeves. One model sleeve can only be matched with one model tap. Different models of sleeves need to be carried during operation, which is troublesome to replace.

[0003] The utility model of announcement number CN109465505B discloses a safety anti-breakage tap chuck. The technical solution key points include a chuck body, a tap sleeve, a support arm and a telescopic tightening screw, the front central axis of the chuck body is provided with a taper sleeve fixing groove, and the upper and lower side walls of the taper sleeve fixing groove are provided with longitudinal tightening threaded holes; the telescopic tightening screw includes a screw body, the tap sleeve is provided with a tap fixing groove; the tap sleeve is distributed in the taper sleeve fixing groove and is tightened and fixed by the telescopic tightening screw through the tightening threaded hole; the support arm includes a support arm body, the support arm body is nearly "7" shaped, distributed on the left and right sides of the front of the chuck body, and the lower left end of the support arm body is in compression contact with the shank of the tap. Although it can achieve good tap tightening effect, convenient tap replacement and effective prevention of tap breakage, it still can only match one model of sleeve with one model of tap, which cannot meet the requirements of multiple specifications. Summary of the Invention

[0004] The purpose of the utility model is to provide an adjustable size tap sleeve to address the deficiencies of the above-mentioned prior art, so as to achieve size adjustment and multi-purpose use of one sleeve to meet the tapping operations of taps of different sizes.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] An adjustable tap sleeve comprises a barrel and a clamping structure arranged inside the barrel, wherein the barrel comprises a cylindrical end with an internal thread and a conical end with a smooth inner wall;

[0007] The clamping structure includes a columnar base and a movable clamping claw provided at the clamping portion at the head end of the columnar base, and an external thread is provided on the outer end surface of the columnar base to match the internal thread of the cylindrical end, and a plurality of movable clamping claws are provided at intervals and correspondingly engage and are respectively rotatably provided on the clamping portion;

[0008] During installation, the cylinder is sleeved on the outside of the clamping structure and the opening aperture of the movable clamping claw is limited and adjusted through a locking ring arranged on the columnar base.

[0009] The end of the movable claw is provided with a connecting shaft, and the columnar base is provided with mounting holes corresponding to the connecting shafts one by one, and the connecting shafts are limited by the provided pin shafts.

[0010] The outer end surface of the movable claw is set as a tapered surface.

[0011] The movable claws are provided at intervals of 3 to 6.

[0012] The movable claws are provided with four at intervals.

[0013] A limiting ring for limiting the position of the movable claw is provided at the front end port of the cone end.

[0014] The beneficial effects of the utility model are:

[0015] (1) The adjustable tap sleeve is provided with a cylinder body and a clamping structure arranged inside the cylinder body, and the cylinder body includes a cylindrical end with an internal thread and a conical end with a smooth inner wall; the clamping structure includes a columnar base and a movable clamping claw, and the outer end surface of the columnar base is provided with an external thread matching the internal thread of the cylindrical end, and a plurality of movable clamping claws are arranged at intervals and are respectively rotatably arranged on the clamping part, and the movable clamping claws are correspondingly buckled to form a limiting clamping mouth; when installed, the movable clamping claw is connected to the columnar base through a pin shaft, and the movable clamping claw can rotate freely along the pin shaft; the columnar base is matched with the cylinder body thread, and the depth of the columnar base screwed into the cylinder body is adjusted by rotating the cylinder body. When the columnar base is screwed into the cylinder body to a certain depth, the movable clamping claw is squeezed by the conical end of the cylinder body and contracts. The deeper the screwing depth, the tighter the movable clamping claw contracts. The appropriate tap can be selected according to the working conditions, the adjusting sleeve is matched with the tap, and finally the cylinder body is limited and fixed with a locking ring to meet the requirements of different apertures.

[0016] (2) The cylinder and the clamping structure can be matched through threaded installation, which is convenient and quick to install. By adjusting the tightening depth, the retraction state of the movable clamping claw can be adjusted, thereby meeting the multi-purpose needs of one cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the overall structural diagram of the utility model;

[0018] Figure 2 It is a structural diagram of the cylinder;

[0019] Figure 3 It is a structural diagram of the card-mounted structure;

[0020] Figure 4 It is a structural diagram of the movable claw;

[0021] Figure 5 It is a structural diagram of the locking ring. DETAILED DESCRIPTION

[0022] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0023] The utility model provides a tap sleeve with adjustable size, such as Figures 1 to 5 shown.

[0024] An adjustable tap sleeve comprises a barrel 1 and a mounting structure 2 disposed within the barrel. The barrel 1 comprises an internally threaded cylindrical end 11 and a smooth tapered end 12. The mounting structure 2 comprises a cylindrical base 21 and a movable claw 22 disposed on a clamping portion 211 at the front end of the cylindrical base 21. The outer end surface of the cylindrical base 21 is provided with external threads that mate with the internal threads of the cylindrical end 11. Multiple movable claws 22 are provided at intervals and are rotatably mounted on the clamping portion. The movable claws 22 engage with corresponding clamps to form a limiting clamp. A limiting ring is provided at the front end of the tapered end to limit the position of the movable claw 22.

[0025] During installation, the cylinder 1 is sleeved on the outside of the clamping structure 2 and the opening diameter of the movable clamping claw 22 is limited and adjusted by the locking ring 3 provided on the columnar base.

[0026] In this embodiment, the distal end of the movable jaw 22 is provided with a connecting shaft 221. Mounting holes corresponding to the connecting shafts 221 are defined in the cylindrical base 21 and secured in position by a pin. Three to six movable jaws are provided at intervals; in this embodiment, four are provided at intervals, and the outer end surfaces of the movable jaws are tapered.

[0027] During installation, the movable claw is connected to the cylindrical base through a pin shaft, and the movable claw can rotate freely along the pin shaft; the cylindrical base is matched with the cylinder thread, and the depth of the cylindrical base screwed into the cylinder is adjusted by rotating the cylinder. When the cylindrical base is screwed into the cylinder to a certain depth, the movable claw is squeezed by the tapered end of the cylinder and shrinks. The deeper the screwing depth, the tighter the movable claw shrinks. The appropriate tap can be selected according to the operating conditions, the sleeve can be adjusted to match the tap, and finally the cylinder can be limited and fixed with a locking ring to meet the requirements of different apertures.

[0028] If the words "first" and "second" are used in this patent to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying the description, and the above words have no special meaning.

[0029] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0030] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "center", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the protection content of the present invention.

Claims

1. An adjustable tap sleeve, characterized by: It includes a cylinder and a clamping structure arranged inside the cylinder, and the cylinder includes a cylindrical end with an internal thread and a conical end with a smooth inner wall; The clamping structure includes a columnar base and a movable clamping claw provided at the clamping portion at the head end of the columnar base, and an external thread is provided on the outer end surface of the columnar base to match the internal thread of the cylindrical end, and a plurality of movable clamping claws are provided at intervals and correspondingly engage and are respectively rotatably provided on the clamping portion; During installation, the cylinder is sleeved on the outside of the clamping structure and the opening aperture of the movable clamping claw is limited and adjusted through a locking ring arranged on the columnar base.

2. The adjustable tap sleeve according to claim 1, characterized in that: The end of the movable claw is provided with a connecting shaft, and the columnar base is provided with mounting holes corresponding to the connecting shafts one by one, and the connecting shafts are limited by the provided pin shafts.

3. The adjustable tap sleeve according to claim 1, characterized in that: The outer end surface of the movable claw is set as a tapered surface.

4. The adjustable tap sleeve according to any one of claims 1 to 3, characterized in that: The movable claws are provided at intervals of 3 to 6.

5. The adjustable tap sleeve according to claim 4, characterized in that: The movable claws are provided with four at intervals.

6. The adjustable tap sleeve according to claim 4, characterized in that: A limiting ring for limiting the position of the movable claw is provided at the front end port of the cone end.

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