CN219152708U - Fixed torque wrench - Google Patents

Abstract

The utility model provides a constant torque wrench, and relates to the technical field of wrenches. The constant torque wrench includes: the operating mechanism is detachably connected with the working mechanism, and the working mechanism comprises a motor group and is detachably connected with the operating mechanism; the transmission assembly is in transmission connection with an output shaft of the motor group; and the sleeve assembly is in transmission connection with an output shaft of the transmission assembly. The utility model solves the defect that the fixed torque wrench in the prior art is inconvenient to carry. The torque wrench is convenient to carry, and the working efficiency is greatly improved.

Description

Fixed torque wrench

Technical Field

The utility model relates to the technical field of wrenches, in particular to a constant torque wrench.

Background

The torque wrench is a tool for tightening and loosening bolts and nuts, particularly for loosening rusted bolts, and is also applied to the anchor change of sleeper nylon sleeves. The secondary power forms comprise an electric fixed torque wrench, a lithium battery fixed torque wrench, an internal combustion engine fixed torque wrench and the like; from the working principle, there are impact torque wrench and torque wrench. The existing fixed torque wrench consists of a power, a speed reduction transmission part, an output sleeve assembly and the like. During operation, the torque output by electric or other power is transmitted through speed reduction, and finally the torque is output by the output sleeve, so that the fastening and unscrewing operations of the bolts and nuts on the fastener are completed.

The motor in the existing electric static torque wrench structure is large in size and inconvenient to carry. When the device works, a 220V single-phase power supply is required, so that good insulation of a construction environment is required to be ensured, and if the use environment is wet, personal safety of staff can be threatened.

Disclosure of Invention

The utility model provides a fixed torque wrench, which is used for solving the defect that the fixed torque wrench is inconvenient to carry in the prior art and realizing the convenience of carrying the fixed torque wrench.

The utility model provides a constant torque wrench, comprising: the operating mechanism is detachably connected with the working mechanism, and the working mechanism comprises

The motor unit is detachably connected with the operating mechanism;

the transmission assembly is in transmission connection with an output shaft of the motor group; and

and the sleeve assembly is in transmission connection with an output shaft of the transmission assembly.

According to the constant torque wrench provided by the utility model, the operating mechanism comprises the switch handle, the connecting rod and the lithium battery assembly, wherein the switch handle, the connecting rod and the lithium battery assembly are assembled into a whole or are independent, the connecting rod is arranged between the switch handle and the lithium battery assembly, and the lithium battery assembly is detachably connected with the motor unit.

According to the fixed torque wrench provided by the utility model, the transmission assembly comprises a shell, a first speed reducing mechanism and a second speed reducing mechanism, wherein the first speed reducing mechanism and the second speed reducing mechanism are arranged in the shell and are in transmission connection, an output shaft of the motor unit is in transmission connection with an input shaft of the first speed reducing mechanism, and an output shaft of the second speed reducing mechanism is in transmission connection with the sleeve assembly.

According to the constant torque wrench provided by the utility model, the first speed reducing mechanism comprises the first gear reducer and the second gear reducer, the output shaft of the motor unit is in transmission connection with the input shaft of the first gear reducer, the output shaft of the first gear reducer is in transmission connection with the input shaft of the second gear reducer, and the output shaft of the second gear reducer is in transmission connection with the second speed reducing mechanism.

According to the constant torque wrench provided by the utility model, the second speed reducing mechanism comprises a first planetary speed reducer, a second planetary speed reducer and a third planetary speed reducer, wherein the first planetary speed reducer, the second planetary speed reducer and the third planetary speed reducer are coaxially arranged, the output shaft of the second gear speed reducer is in transmission connection with the input shaft of the first planetary speed reducer, the output shaft of the first planetary speed reducer is in transmission connection with the input shaft of the second planetary speed reducer, the output shaft of the second planetary speed reducer is in transmission connection with the input shaft of the third planetary speed reducer, and the output shaft of the third planetary speed reducer is in transmission connection with the sleeve assembly.

According to the constant torque wrench provided by the utility model, the lithium battery assembly comprises the battery box and the lithium battery, one side of the battery box is connected with the connecting rod, the other side of the battery box is detachably connected with the motor group, and the lithium battery is installed in the battery box.

According to the constant torque wrench provided by the utility model, the switch is arranged on the switch handle, and the switch is electrically connected with the lithium battery.

According to the constant torque wrench provided by the utility model, the constant torque wrench further comprises a counter force arm, and the counter force arm is connected in series between the transmission assembly and the sleeve assembly.

According to the constant torque wrench provided by the utility model, the working mechanism is provided with the lighting device.

According to the fixed torque wrench provided by the utility model, the switch handle is provided with the anti-skid sleeve.

The above technical solutions in the embodiments of the present utility model have at least one of the following technical effects:

according to the utility model, the operating mechanism and the working mechanism are detachably connected, so that the operating mechanism and the working mechanism can be conveniently detached, when the operating mechanism and the working mechanism are required to be assembled, and when the operating mechanism and the working mechanism are required to be transferred, the operating mechanism and the working mechanism can be detached and separately placed, so that the small-space placement is facilitated. Meanwhile, the components of the utility model are connected in series, so that the utility model has compact structure and is convenient for carrying.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a constant torque wrench according to the present utility model;

fig. 2 is a cross-sectional view of a constant torque wrench provided by the present utility model.

Reference numerals:

100: an operating mechanism; 200: a working mechanism; 1: a switch handle; 2: a connecting rod; 3: a lithium battery module; 4: a motor group; 5: a transmission assembly; 6: a reaction arm; 7: a sleeve assembly; 31: a battery box; 32: a lithium battery; 51: a housing; 52: a first gear reducer; 53: a second gear reducer; 54: a first planetary reducer; 55: a second planetary reducer; 56: and a third planetary reducer.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In describing embodiments of the present utility model, it should be noted that the terms "first" and "second" are used for clarity in describing the numbering of the product components and do not represent any substantial distinction unless explicitly stated or defined otherwise. The directions of the upper and the lower are all the directions shown in the drawings. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances. Furthermore, the meaning of "plurality" is two or more. In the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally indicates that the associated object is an "or" relationship.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The torque wrench is a tool for tightening and loosening bolts and nuts, particularly for loosening rusted bolts, and is also applied to the anchor change of sleeper nylon sleeves. The torque may be set or adjusted. High precision, small volume, light weight and no impact.

The secondary power forms comprise an electric fixed torque wrench, a lithium battery fixed torque wrench, an internal combustion engine fixed torque wrench and the like; from the working principle, there are impact type wrenches and static torque wrenches, the utility model is mainly based on the static torque wrenches for improvement. The components of the existing constant torque wrench products are composed of power, a speed reduction transmission part, an output sleeve assembly and the like. During operation, the torque output by electric or other power is transmitted through speed reduction, and finally the torque is output by the output sleeve, so that the fastening and unscrewing operations of the bolts and nuts on the fastener are completed. The existing electric static torque wrench structure uses a series excited motor with larger volume, and is inconvenient to carry due to the need of an external power supply. The disadvantages in functional applications are mainly: the 220V single-phase power supply is required to be used, good insulation is required, and the use environment is moist and has the possibility of electric shock or personal injury.

Referring to fig. 1 and 2, an embodiment of the present utility model provides a constant torque wrench, including: the operating mechanism 100 and the working mechanism 200 are detachably connected, the working mechanism 200 comprises a motor group 4, a transmission assembly 5 and a sleeve assembly 7, and the motor group 4 is detachably connected with the operating mechanism 100; the transmission assembly 5 is in transmission connection with an output shaft of the motor group 4; the sleeve assembly 7 is in driving connection with the output shaft of the transmission assembly 5.

With the above structure, the utility model can be conveniently disassembled, when the operation is needed, the operation mechanism 100 and the operation mechanism 200 are assembled, and when the operation mechanism is needed to be transferred, the operation mechanism 100 and the operation mechanism 200 can be disassembled and separately placed, so that the placement in a small space is convenient. Meanwhile, the parts of the utility model are connected in series, and the connection mode is convenient for carrying the utility model. Meanwhile, the device is very convenient for work.

It should be noted that, in some embodiments, the detachable connection between the operating mechanism 100 and the working mechanism 200 is one of a threaded connection, a clamping connection, and the like.

Referring to fig. 1 and 2, according to some embodiments of the present utility model, an operating mechanism 100 includes a switch handle 1, a connection rod 2, and a lithium battery module 3, the switch handle 1, the connection rod 2, and the lithium battery module 3 are assembled integrally or independently, the connection rod 2 is disposed between the switch handle 1 and the lithium battery module 3, and the lithium battery module 3 is detachably connected with a motor pack 4.

In the structure, the switch handle 1 is annular, and when the switch handle 1 works, a worker can hold the switch handle 1 to work, and meanwhile, the annular switch handle 1 has the advantage of small occupied space, and is convenient to carry and transport. In the process of transferring, a worker can carry the device by one hand, thereby greatly facilitating the work of the worker. The lithium battery assembly 3 adopts a lithium battery as driving power, and compared with the existing driving power adopting a motor and an internal combustion engine, the lithium battery assembly 3 does not need to use a power supply or gasoline in the use process, is clean and environment-friendly, and avoids the damage to the environment and people.

It should be noted that the switch handle 1 may be a rectangular ring, and a gravure matched with a finger is arranged at the grip of the switch handle 1, so that on one hand, the anti-slip effect is achieved, and on the other hand, the comfort level of staff is improved. The switch handle 1 is not limited to a ring shape, but may be a left-right symmetrical armrest, similar to the handlebar of a bicycle. When the device is used, workers with different heights need to set different heights by the device, so that the workers can operate. If the height of the device is lower to the staff, the staff needs to bend down, the labor intensity of the staff can be increased for a long time, and the device is unfavorable to the health of the staff. Based on this, in order to be convenient for adjust the height of whole device, connecting rod 2 can also design as the telescopic link, specifically electric telescopic link, and this electric telescopic link's one end and switch handle 1 fixed connection, the other end and lithium cell module 3 fixed connection. The staff can adjust according to its actual height to adjust to suitable height, make the staff work better.

Referring to fig. 1-2, according to some embodiments of the present utility model, the transmission assembly 5 includes a housing 51, a first reduction mechanism and a second reduction mechanism, the first reduction mechanism and the second reduction mechanism are disposed inside the housing 51, the first reduction mechanism and the second reduction mechanism are in transmission connection, an output shaft of the motor group 4 is in transmission connection with an input shaft of the first reduction mechanism, and an output shaft of the second reduction mechanism is in transmission connection with the sleeve assembly 7.

In the above-described structure, the housing 51 is integrally assembled with the housing of the motor group 4, so that the motor group 4 and the transmission assembly 5 are connected as a single body, and the output torque of the present apparatus can be increased by the first reduction mechanism and the second reduction mechanism.

Referring to fig. 1-2, according to some embodiments of the present utility model, the first reduction mechanism includes a first gear reducer 52 and a second gear reducer 53, an output shaft of the motor set 4 is in driving connection with an input shaft of the first gear reducer 52, an output shaft of the first gear reducer 52 is in driving connection with an input shaft of the second gear reducer 53, and an output shaft of the second gear reducer 53 is in driving connection with the second reduction mechanism.

With the above structure, the gears of the first gear reducer 52 and the second gear reducer 53 are made of high-quality low-carbon alloy steel, and not only has high strength, but also has high tooth surface hardness and accuracy. The first gear reducer 52 and the second gear reducer 53 also have a certain stability and wear resistance. Not only has high transmission rate during operation, but also can lighten noise generated during operation.

Referring to fig. 1-2, according to some embodiments of the present utility model, the second reduction mechanism includes a first planetary reducer 54, a second planetary reducer 55, and a third planetary reducer 56, the first planetary reducer 54, the second planetary reducer 55, and the third planetary reducer 56 are coaxially disposed, an output shaft of the second gear reducer 53 is in driving connection with an input shaft of the first planetary reducer 54, an output shaft of the first planetary reducer 54 is in driving connection with an input shaft of the second planetary reducer 55, an output shaft of the second planetary reducer 55 is in driving connection with an input shaft of the third planetary reducer 56, and an output shaft of the third planetary reducer 56 is in driving connection with the sleeve assembly 7.

With the above structure, the first planetary reducer 54, the second planetary reducer 55 and the third planetary reducer 56 have multiple sets of gear meshing transmission, the number of gear sets is large, the transmission speed ratio is correspondingly increased, and the bearing capacity, the transmission precision, the efficiency and the motion are high. The first planetary reducer 54, the second planetary reducer 55 and the third planetary reducer 56 have 360-degree uniform loads with 6 larger areas on the gear contact surfaces, and the plurality of tooth surfaces uniformly bear instantaneous impact loads together, so that the first planetary reducer 54, the second planetary reducer 55 and the third planetary reducer 56 bear impact with larger torsion force, and the main body and the bearing parts cannot be damaged or cracked due to overlarge loads.

Referring to fig. 1-2, according to some embodiments of the present utility model, a lithium battery module 3 includes a battery case 31 and a lithium battery 32, one side of the battery case 31 is connected with a connection rod 2, the other side is detachably connected with a motor group 4, and the lithium battery 32 is installed inside the battery case 31. With the above structure, the battery case 31 can provide a protection cavity for the lithium battery 32, and the lithium battery 32 can be assembled.

Referring to fig. 1-2, according to some embodiments of the utility model, a switch is provided on the switch handle 1, the switch being electrically connected to the lithium battery 32. The switch is arranged on the switch handle 1, so that the work of a worker can be facilitated, the switch is a push type switch, when the switch is always pushed to start the lithium battery 32, and when the switch is released, the switch is restored to the original position, and the power supply is disconnected.

Referring to fig. 1-2, according to some embodiments of the present utility model, a reaction arm 6 is further included, the reaction arm 6 being disposed in series between the transmission assembly 5 and the sleeve assembly 7. The reaction arm 6 is specifically fixedly connected between the transmission assembly 5 and the sleeve assembly 7, and the reaction arm 6 is arranged to enable the machine to find a supporting point of the reaction moment during operation.

It should be noted that the reaction arm 6 can be installed at any direction, and after the machine is started, the reaction arm 6 can be driven to rotate due to a certain resistance moment of the bolt and the nut, so that the switch handle part can not freely rotate before the fulcrum is found, and no influence is exerted on an operator. Referring to fig. 1-2, a work mechanism 200 is provided with a lighting device according to some embodiments of the utility model. The lighting device is convenient for work at night.

Referring to fig. 1-2, according to some embodiments of the utility model, an anti-slip sleeve is provided on the switch handle 1. So that the staff is more stable during work.

In embodiments of the utility model, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 embodiments of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (8)

1. A constant torque wrench, comprising: an operating mechanism (100) and a working mechanism (200), wherein the operating mechanism (100) and the working mechanism (200) are detachably connected, and the working mechanism (200) comprises

A motor unit (4) detachably connected to the operating mechanism (100);

the transmission assembly (5) is in transmission connection with the output shaft of the motor group (4); and

the sleeve assembly (7) is in transmission connection with an output shaft of the transmission assembly (5);

the operating mechanism (100) comprises a switch handle (1), a connecting rod (2) and a lithium battery assembly (3), wherein the switch handle (1), the connecting rod (2) and the lithium battery assembly (3) are assembled into a whole or are independent, the connecting rod (2) is arranged between the switch handle (1) and the lithium battery assembly (3), and the lithium battery assembly (3) is detachably connected with the motor group (4);

the transmission assembly (5) comprises a shell (51), a first speed reducing mechanism and a second speed reducing mechanism, wherein the first speed reducing mechanism and the second speed reducing mechanism are arranged inside the shell (51), the first speed reducing mechanism and the second speed reducing mechanism are in transmission connection, an output shaft of the motor unit (4) is in transmission connection with an input shaft of the first speed reducing mechanism, and an output shaft of the second speed reducing mechanism is in transmission connection with the sleeve assembly (7).

2. The fixed torque wrench as claimed in claim 1, wherein the first reduction mechanism includes a first gear reducer (52) and a second gear reducer (53), the output shaft of the motor unit (4) is in driving connection with the input shaft of the first gear reducer (52), the output shaft of the first gear reducer (52) is in driving connection with the input shaft of the second gear reducer (53), and the output shaft of the second gear reducer (53) is in driving connection with the second reduction mechanism.

3. The fixed torque wrench as claimed in claim 2, wherein the second reduction mechanism comprises a first planetary reducer (54), a second planetary reducer (55) and a third planetary reducer (56), the first planetary reducer (54), the second planetary reducer (55) and the third planetary reducer (56) are coaxially arranged, an output shaft of the second gear reducer (53) is in driving connection with an input shaft of the first planetary reducer (54), an output shaft of the first planetary reducer (54) is in driving connection with an input shaft of the second planetary reducer (55), an output shaft of the second planetary reducer (55) is in driving connection with an input shaft of the third planetary reducer (56), and an output shaft of the third planetary reducer (56) is in driving connection with the sleeve assembly (7).

4. The constant torque wrench as claimed in claim 1, wherein the lithium battery pack (3) includes a battery box (31) and a lithium battery (32), one side of the battery box (31) is connected with the connecting rod (2), the other side is detachably connected with the motor group (4), and the lithium battery (32) is mounted inside the battery box (31).

5. The constant torque wrench as claimed in claim 4, wherein a switch is provided on the switch handle (1), the switch being electrically connected to the lithium battery (32).

6. The constant torque wrench as claimed in claim 1, further comprising a reaction arm (6), the reaction arm (6) being serially disposed between the transmission assembly (5) and the sleeve assembly (7).

7. The constant torque wrench as claimed in claim 1, wherein the working mechanism (200) is provided with a lighting device.

8. The constant torque wrench as claimed in claim 1, wherein the switch handle (1) is provided with an anti-slip sleeve.

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