CN216543131U - Tightening tool - Google Patents

Abstract

The utility model discloses a tightening tool, which comprises a top connector, a limiting clamp wheel, a transmission inner core and a bottom connector, wherein the bottom connector is provided with a threaded through hole; when the tightening tool rotates along the second direction, the teeth and the grooves are matched at the second meshing position to transmit torque force, and an idle stroke for the limiting clamping wheel and the bottom connector to rotate relatively is formed between the first meshing position and the second meshing position. It can be used for the tightening of stud and reduces the rate of damage to the stud threads.

Description

Tightening tool

Technical Field

The utility model is used in the field of assembling tools, and particularly relates to a screwing tool.

Background

In the engine assembling process, double-ended stud is used in a plurality of places, the double-ended stud is generally installed through a screwing sleeve, the existing screwing sleeve adopts an internal steel ball type, after the non-countersunk head of the double-ended stud is screwed into the sleeve, the top end of the double-ended stud is jacked through the steel ball and then the double-ended stud is screwed, then the sleeve is loosened, the sleeve is separated from the double-ended stud, and the double-ended stud can be screwed.

The dead condition of screwing up sleeve and double-screw bolt card easily takes place during this scheme in-service use, screws up the sleeve and returns to take up double-end screw bolt when pine, reaches unexpected tightening effect, influences the operating efficiency when causing the damage to the screw thread.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve at least one of the technical problems in the prior art, and provides a screwing tool which can be used for screwing a stud, reduces the damage rate of the stud thread, is more convenient to operate, improves the working efficiency and the screwing success rate, can be disassembled for maintenance, can be replaced, and has low use cost.

The technical scheme adopted by the utility model for solving the technical problem is as follows:

a tightening tool comprises a top connector, a limiting clamping wheel, a transmission inner core and a bottom connector, wherein the bottom connector is provided with a threaded through hole, the transmission inner core comprises a transmission end and a threaded end, the transmission end of the transmission inner core is connected with the limiting clamping wheel and the top connector to form a synchronous rotating integrated assembly, the threaded end of the transmission inner core is screwed into the threaded through hole from the top of the bottom connector, a tooth socket structure matched with the bottom connector to transmit torque is arranged between the limiting clamping wheel and the bottom connector, the tooth socket structure comprises teeth and grooves, the teeth and the grooves are provided with a first meshing position and a second meshing position, and when the tightening tool rotates along a first direction, the teeth and the grooves are matched at the first meshing position to transmit the torque; when the tightening tool rotates along the second direction, the teeth and the grooves are matched at the second meshing position to transmit torque, and an idle stroke for the limiting clamping wheel and the bottom connector to rotate relatively is formed between the first meshing position and the second meshing position.

In some embodiments, the top connector is provided with a first transmission inner hole, the limit card wheel is provided with a second transmission inner hole, the transmission end of the transmission inner core passes through the second transmission inner hole of the limit card wheel and then is connected with the first transmission inner hole of the top connector, the transmission end of the transmission inner core is matched with the second transmission inner hole of the limit card wheel to transmit torsion, and the transmission end of the transmission inner core is matched with the first transmission inner hole of the top connector to transmit torsion.

In some embodiments, the transmission end of the transmission inner core adopts a square shaft, and the first transmission inner hole and the second transmission inner hole adopt a square shaft hole matched with the square shaft.

In some embodiments, the top connector is provided with a positioning pin hole, and a positioning pin for locking the transmission end of the transmission inner core to the first transmission inner hole is arranged in the positioning pin hole.

In some embodiments, a limit step surface matched with the limit clamping wheel is arranged between the transmission end and the threaded end of the transmission inner core.

In some embodiments, an inner cavity is formed in the top of the bottom connector, the limiting clamping wheel is embedded into the inner cavity, and the tooth socket structure is arranged between the outer circumferential surface of the limiting clamping wheel and the inner wall surface of the inner cavity.

In some embodiments, the spline structure includes teeth provided on an outer circumferential surface of the click wheel and grooves provided on an inner wall surface of the inner cavity, and the teeth and the grooves extend in a direction in which the click wheel is fitted into the inner cavity.

In some embodiments, the outer circumferential surface of the limit clamp wheel is provided with a plurality of teeth distributed along the circumferential direction, and the inner wall surface of the inner cavity is correspondingly provided with a plurality of grooves distributed along the circumferential direction.

In some embodiments, the bottom edge of the top connector is provided with a convex edge, the convex edge defines a cavity at the bottom end face of the top connector, and the top of the bottom connector is embedded into the cavity.

In some embodiments, the top of the top connector is provided with a square head.

One of the above technical solutions has at least one of the following advantages or beneficial effects: when the double-end stud is screwed by adopting the screwing tool in the technical scheme, the top connector rotates under the action of external force, the top connector drives the limiting clamping wheel to rotate, the limiting clamping wheel is matched with the bottom connector at a first meshing position through the tooth socket structure, the limiting clamping wheel drives the bottom connector to rotate, the double-end stud is screwed into the threaded through hole of the bottom connector in a non-countersunk manner and is tightly propped against the transmission inner core, and then the double-end stud can be screwed; after the head connector is screwed down, the top connector is reversed, the limiting clamping wheel and the bottom connector rotate relatively, after a section of idle stroke is rotated, the limiting clamping wheel and the bottom connector are matched at a second meshing position through a tooth groove structure, the limiting clamping wheel drives the bottom connector to rotate, and during the rotation, the transmission inner core retreats along the rotation of the threaded through hole and is separated from the non-countersunk head top of the stud, so that the screwing tool can be easily taken out. This technical scheme can be used for stud's the tightening to reduce the damage rate to stud screw thread, it is more convenient to operate, improves the operating efficiency and screws up the success rate, and in addition, whole instrument can be disassembled and maintained, and the part is removable, and use cost is low.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of one embodiment of the present invention;

FIG. 2 is a schematic view of the mating structure of the teeth and grooves of one embodiment shown in FIG. 1 in a first engaged position;

FIG. 3 is a schematic view of the mating structure of the teeth and grooves of one embodiment shown in FIG. 1 in a second engaged position;

FIG. 4 is a schematic view of a top connector configuration of the embodiment shown in FIG. 1;

FIG. 5 is a schematic view of a bottom connector configuration of the embodiment shown in FIG. 1;

FIG. 6 is a schematic view of the structure of the limit catch wheel of FIG. 1 according to one embodiment;

FIG. 7 is a schematic view of the drive core of one embodiment shown in FIG. 1;

fig. 8 is an exploded view of the structure of one embodiment shown in fig. 1.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the utility model, the meaning of "a plurality" is one or more, the meaning of "a plurality" is more than two, and the terms of "more than", "less than", "more than" and the like are understood to exclude the number; the terms "above", "below", "within" and the like are understood to include the instant numbers. In the description of the present invention, if there is description of "first" and "second" only for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the present invention, unless otherwise specifically limited, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be mechanically coupled, may be electrically coupled or may be capable of communicating with each other; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.

Referring to fig. 1-8, an embodiment of the utility model provides a tightening tool, which includes a top connector 1, a limit clamp wheel 2, a transmission core 3 and a bottom connector 4, wherein the bottom connector 4 is provided with a thread through hole 41, the transmission core 3 includes a transmission end 31 and a thread end 32, the transmission end 31 of the transmission core 3 is connected with the limit clamp wheel 2 and the top connector 1 to form a synchronously rotating integrated assembly, the thread end 32 of the transmission core 3 is provided with an external thread, the thread end 32 of the transmission core 3 is screwed into the thread through hole 41 from the top of the bottom connector 4 and is in threaded connection with the bottom connector 4, and 3-4 teeth are left on the bottom thread of the thread through hole 41 after the transmission core 3 is screwed into the thread through hole 41. A tooth groove structure 5 matched with the bottom connector 4 for transmitting torque force is arranged between the limiting clamping wheel 2 and the bottom connector 4, the tooth groove structure 5 comprises teeth and grooves, the teeth and the grooves are provided with a first meshing position 51 and a second meshing position 52, and when the tightening tool rotates along the first direction a, the teeth and the grooves are matched with each other at the first meshing position 51 for transmitting the torque force; when the tightening tool is rotated in the second direction b, the teeth and grooves cooperate at the second engagement position 52 to transmit a torque force, and an idle stroke for relative rotation of the limit catch wheel 2 and the bottom connector 4 is formed between the first engagement position 51 and the second engagement position 52. In other words, when the screwing tool switches the rotation direction, the limit clamping wheel 2 and the bottom connector 4 can rotate relatively within a certain rotation angle range, and in the relative rotation process of the limit clamping wheel 2 and the bottom connector 4, the threaded end 32 of the transmission inner core 3 can retreat for a certain distance along the threaded through hole 41 to be separated from the non-countersunk top of the stud, so that the stud is prevented from being taken up when being loosened, and the thread is prevented from being damaged.

Referring to fig. 1, 2 and 3, when the stud is screwed by using the screwing tool of the embodiment of the utility model, the top connector 1 rotates under the action of external force, the top connector 1 drives the limiting clamp wheel 2 to rotate, the limiting clamp wheel 2 is matched with the bottom connector 4 at a first meshing position 51 through the tooth space structure 5, the limiting clamp wheel 2 drives the bottom connector 4 to rotate, and the stud is screwed into the threaded through hole 41 of the bottom connector 4 without being countersunk and is dead against the transmission inner core 3, so that the stud can be screwed; after screwing up, reverse top connector 1, spacing calorie of wheel 2 and bottom connector 4 produce relative rotation, after rotating a section idle stroke, spacing calorie of wheel 2 and bottom connector 4 pass through tooth's socket structure 5 and cooperate at second meshing position 52, and spacing calorie of wheel 2 drives bottom connector 4 and rotates, and during the period, transmission inner core 3 revolves the backset along screw through hole 41, breaks away from with stud non-countersunk head top, can easily take out the instrument of screwing up. This technical scheme can be used for stud's the tightening to reduce the damage rate to stud screw thread, it is more convenient to operate, improves the operating efficiency and screws up the success rate, and in addition, whole instrument can be disassembled and maintained, and the part is removable, and use cost is low.

The top connector 1, the limiting clamping wheel 2 and the transmission inner core 3 can be assembled and connected in various modes such as sleeving, clamping and the like to form an integral assembly which rotates together and transmits torsion. Referring to fig. 1, 4, 6 and 8, in some embodiments, the top connector 1 is provided with a first transmission inner hole 11, the limit catch wheel 2 is provided with a second transmission inner hole 21, and the transmission end 31 of the transmission inner core 3 passes through the second transmission inner hole 21 of the limit catch wheel 2 and then is connected with the first transmission inner hole 11 of the top connector 1 to form an assembly. Wherein, the transmission end 31 of the transmission inner core 3 is matched with the second transmission inner hole 21 of the limit clamping wheel 2 to transmit the torsion, and the transmission end 31 of the transmission inner core 3 is matched with the first transmission inner hole 11 of the top connector 1 to transmit the torsion. In this embodiment, the transmission inner core 3 passes through the inner holes of the top connector 1 and the limiting clamping wheel 2 as a connecting shaft, and is connected with the top connector 1 and the limiting clamping wheel 2 to form an assembly while torque transmission is realized. The top connector 1, the limiting clamping wheel 2 and the transmission inner core 3 adopt a structural form that independent components are mutually assembled, so that the disassembly is convenient, the components can be independently replaced after being worn, and the use cost is reduced.

The transmission end 31 of the transmission inner core 3 is matched with the first transmission inner hole 11 and the second transmission inner hole 21 to transmit torque force, and the transmission end 31 of the transmission inner core 3, the first transmission inner hole 11 and the second transmission inner hole 21 are required to have non-circular cross sections, for example, in some embodiments, referring to fig. 4, 6 and 7, the transmission end 31 of the transmission inner core 3 adopts a square shaft, and the first transmission inner hole 11 and the second transmission inner hole 21 adopt a square shaft hole matched with the square shaft.

In some embodiments, referring to fig. 1, 4 and 8, the top connector 1 is provided with a positioning pin hole 12, and a positioning pin 13 for locking the driving end 31 of the driving core 3 in the first driving inner hole 11 is disposed in the positioning pin hole 12, so as to prevent the driving core 3 from falling off from the first driving inner hole 11, and make the whole device more convenient to use.

The limiting clamping wheel 2 is sleeved on the transmission inner core 3 and forms an integral assembly with the transmission inner core 3 and the top connector 1, referring to fig. 7, a limiting step surface 33 matched with the limiting clamping wheel 2 is arranged between a transmission end 31 and a threaded end 32 of the transmission inner core 3, and after the transmission inner core 3 is connected with the top connector 1, the limiting clamping wheel 2 is pressed on the bottom end surface of the top connector 1 through the limiting step surface 33. In the embodiment, the limiting step surface 33 is directly formed at the transition position of the transmission end 31 and the thread end 32, so that the axial limiting of the limiting clamping wheel 2 is realized, and the integral structure of the transmission inner core 3 is simplified.

The tooth socket structure 5 can be arranged on the axial end face where the bottom connector 4 and the limiting clamping wheel 2 are matched with each other, or on the outer peripheral surface of the limiting clamping wheel 2, for example, in some embodiments, referring to fig. 5 and 6, an inner cavity 42 is arranged at the top of the bottom connector 4, the limiting clamping wheel 2 is embedded into the inner cavity 42, and the tooth socket structure 5 is arranged between the outer peripheral surface of the limiting clamping wheel 2 and the inner wall surface of the inner cavity 42. In this embodiment, the tooth socket structure 5 is disposed between the outer peripheral surface of the limit catch wheel 2 and the inner wall surface of the inner cavity 42, so that the torque transmission capability of the tooth socket structure 5 can be increased, and the service life of the whole tool can be prolonged.

Further, referring to fig. 5 and 6, the tooth socket structure 5 includes teeth 51 arranged on the outer peripheral surface of the limiting clamping wheel 2 and grooves 52 arranged on the inner wall surface of the inner cavity 42, and the teeth 51 and the grooves 52 extend along the direction in which the limiting clamping wheel 2 is embedded into the inner cavity 42, so that when the transmission inner core 3 is loosened reversely, the limiting clamping wheel 2 can be driven to retreat relative to the bottom connector 4, and meanwhile, the limiting clamping wheel 2 is convenient to disassemble and assemble in the inner cavity 42.

The gullet structure 5 may include one tooth 51 and one gullet 52, or may include a plurality of teeth 51 and a plurality of gullets 52. Referring to fig. 5 and 6, the outer circumferential surface of the limit catch wheel 2 is provided with a plurality of teeth 51 distributed along the circumferential direction, the inner wall surface of the inner cavity 42 is correspondingly provided with a plurality of grooves 52 distributed along the circumferential direction, and the plurality of teeth 51 and the plurality of grooves 52 are correspondingly matched, so that the torque transmission capability of the tooth socket structure 5 is improved.

In some embodiments, referring to fig. 1 and 8, the bottom edge of the top connector 1 is provided with a convex edge 14, the convex edge 14 extends to a certain length in the direction of the bottom connector 4, the convex edge 14 defines a concave cavity at the bottom end face of the top connector 1, the top of the bottom connector 4 is embedded into the concave cavity to form a socket structure capable of rotating freely, the top connector 1 and the bottom connector 4 are matched through the socket structure, and a closed cavity covering the limit clamp wheel 2 and the transmission inner core 3 is formed to prevent impurities from entering.

In some embodiments, referring to fig. 1, the top of the top connector 1 is provided with a square head 15 to facilitate the fitting of a tightening tool to the bit for transmitting torque.

In the description herein, references to the description of the term "example," "an embodiment," or "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The utility model is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the utility model, and such equivalent modifications or substitutions are included in the scope of the claims of the present application.

Claims (10)

1. A tightening tool is characterized by comprising a top connector, a limiting clamping wheel, a transmission inner core and a bottom connector, wherein the bottom connector is provided with a threaded through hole, the transmission inner core comprises a transmission end and a threaded end, the transmission end of the transmission inner core is connected with the limiting clamping wheel and the top connector to form a synchronous rotating integrated assembly, the threaded end of the transmission inner core is screwed into the threaded through hole from the top of the bottom connector, a tooth space structure matched with the limiting clamping wheel and the bottom connector to transmit torsion is arranged between the limiting clamping wheel and the bottom connector, the tooth space structure comprises teeth and grooves, the teeth and the grooves are provided with a first meshing position and a second meshing position, and when the tightening tool rotates along a first direction, the teeth and the grooves are matched at the first meshing position to transmit the torsion; when the tightening tool rotates along the second direction, the teeth and the grooves are matched at the second meshing position to transmit torque, and an idle stroke for the limiting clamping wheel and the bottom connector to rotate relatively is formed between the first meshing position and the second meshing position.

2. The tightening tool according to claim 1, wherein the top connector has a first transmission hole, the limit clamp wheel has a second transmission hole, the transmission end of the transmission core passes through the second transmission hole of the limit clamp wheel and then is connected to the first transmission hole of the top connector, the transmission end of the transmission core is matched with the second transmission hole of the limit clamp wheel to transmit torque, and the transmission end of the transmission core is matched with the first transmission hole of the top connector to transmit torque.

3. The tightening tool according to claim 2, wherein the drive end of the drive core is a square shaft, and the first and second drive bores are square shaft bores that mate with the square shaft.

4. The tightening tool according to claim 2 or 3, wherein the top connector is provided with a dowel hole in which a dowel pin is provided for locking the driving end of the driving core to the first driving bore.

5. The tightening tool according to claim 3, wherein a limit step surface is provided between the drive end and the threaded end of the drive core to engage with the limit catch wheel.

6. The tightening tool according to claim 1, wherein an inner cavity is formed in the top of the bottom connector, the limit clamping wheel is embedded in the inner cavity, and the tooth socket structure is formed between the outer peripheral surface of the limit clamping wheel and the inner wall surface of the inner cavity.

7. The tightening tool according to claim 6, wherein the spline structure includes teeth provided on an outer peripheral surface of the retainer sheave and grooves provided on an inner wall surface of the inner cavity, the teeth and the grooves extending in a direction in which the retainer sheave is fitted into the inner cavity.

8. The tightening tool according to claim 7, wherein the outer circumferential surface of the retainer ring is provided with a plurality of teeth distributed in the circumferential direction, and the inner wall surface of the inner cavity is correspondingly provided with a plurality of grooves distributed in the circumferential direction.

9. The tightening tool according to claim 6, wherein the bottom edge of the top connector is provided with a convex edge, the convex edge defines a cavity at the bottom end face of the top connector, and the top of the bottom connector is embedded in the cavity.

10. The tightening tool according to claim 1, wherein the top of the top connector is provided with a square head.

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