CN203109872U - Tap wrench adjustable in torque - Google Patents

Abstract

The utility model relates to the technical field of wrenches, in particular to a thread tapping wrench with adjustable torque. The screw tap wrench with adjustable torque includes a cylindrical handle, a second handle, a ring, a grip chuck with an arc-shaped notch and a torque adjustment assembly, and one end of the cylindrical handle is connected with the ring to form a In one piece, the second handle and the cylindrical handle are symmetrically arranged on the ring, and a telescopic rod is arranged on the second handle or the cylindrical handle, and the size of the force arm can be adjusted through the telescopic rod. The hand chuck is arranged inside the ring and matched with the ring, and the torque adjustment assembly is arranged in the inner cavity of the cylindrical handle and is engaged with the grip chuck through a straight pin , to prevent the tap from breaking due to excessive torque.

Description

A screw tap wrench with adjustable torque

technical field

The utility model relates to the technical field of wrenches, in particular to a thread tapping wrench with adjustable torque.

Background technique

At present, the commonly used tapping wrenches are generally rigid non-adjustable torque wrenches. One type of tapping wrench corresponds to one or several types of taps. It is often necessary to replace different types of tapping wrenches to complete the tapping of holes with different apertures. , in the tapping process, since the torque is rigid and non-adjustable, with the gradual increase of the tightening torque, the tightening torque will often exceed the maximum torque value that the tap can withstand, which will cause the tap to break due to excessive tightening torque and eccentricity , and the broken tap in the hole often needs to be corroded by electric discharge machining, which adds a lot of unnecessary trouble and cost to the enterprise. In addition, the length of the handle of the commonly used tapping wrench is not adjustable, and in the process of manual tapping, especially when the diameter of the hole is large, it often requires a lot of force to tap it.

Therefore, aiming at the above deficiencies, the utility model provides a thread tapping wrench with adjustable torque.

Utility model content

(1) Technical problems to be solved

The purpose of the utility model is to solve the problem that the tap is easy to break due to the unadjustable torque and excessive torque of the existing tapping wrench during the tapping process.

(2) Technical solution

In order to solve the above technical problems, the utility model provides a torque-adjustable tapping wrench, which includes a cylindrical handle, a ring, a grip chuck with an arc-shaped notch, and a torque adjustment assembly. One end of the handle is integrated with the ring, the center of the gripper chuck is connected with the tap, the gripper chuck is arranged inside the ring and matches with the ring, and the torque adjustment The component is arranged in the inner cavity of the cylindrical handle and is clamped with the gripper chuck through a cylindrical pin.

Wherein, the torque adjustment assembly includes a piston, a spring and a screw, one end of the piston is connected to the screw through a spring, the other end of the piston has an arc-shaped notch, and the arc-shaped notch of the piston is connected to the gripper The arc-shaped notches of the chuck are clamped by cylindrical pins, and the screws are threadedly connected with the inner wall of the inner cavity of the cylindrical handle.

Wherein, a plurality of arc-shaped notches are evenly distributed on the edge of the gripper chuck.

Wherein, the center of the gripper chuck has a square hole, and a tap sleeve is inserted into the square hole of the gripper chuck, and the gripper chuck is connected with the tap through the tap sleeve.

Wherein, the tapping wrench further includes a second handle, and the second handle is symmetrically arranged on the ring with the cylindrical handle.

Wherein, the gripper chuck is a magnetic gripper chuck.

Wherein, a telescopic rod is sheathed on the cylindrical handle.

Wherein, a telescopic rod is sleeved on the second handle.

(3) Beneficial effects

The above technical solution of the utility model has the following advantages: by arranging the gripper chuck inside the ring and matching with the ring, the torque adjustment assembly is arranged on the cylindrical handle The inner cavity is connected with the grip chuck through a straight pin. When the tightening torque of the wrench exceeds the maximum torque value that the tap can bear, the grip chuck and the straight pin will slip, even if the handle continues to be turned, the grip will The hand chuck also no longer rotates, thereby preventing the phenomenon that the screw tap is broken due to excessive torque.

Description of drawings

Fig. 1 is the sectional view of tapping wrench of the utility model embodiment;

Fig. 2 is a schematic diagram of the assembly of the tapping wrench and the tap sleeve of the embodiment of the utility model.

In the figure, 1: grip chuck; 2: cylindrical pin; 3: piston; 4: spring; 5: screw; 6: telescopic rod; 7: cylindrical handle; 8: second handle; 9: ring; 10: Tap set.

Detailed ways

The specific implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

As shown in Figures 1 and 2, the tap wrench provided by the utility model includes a cylindrical handle 7, a ring 9, a grip chuck 1 with an arc-shaped notch and a torque adjustment assembly, and the cylindrical handle 7 One end of one end is integrated with the ring 9, the center of the grip chuck 1 has a square hole, the grip chuck 1 is arranged inside the ring 9 and matches with the ring 9, The torque adjusting assembly is arranged in the inner cavity of the cylindrical handle 7 and is clamped with the gripper chuck 1 through a cylindrical pin 2 . The square hole of the gripper chuck 1 is used to match different types of tap sleeves 10, preferably, the gripper chuck 1 can be a magnetic gripper chuck, the gripper chuck 1 and the torque adjustment assembly The arc notches match with the cylindrical pins 2 respectively.

The torque adjustment assembly includes a piston 3, a spring 4 and a screw 5, one end of the piston 3 is connected with the screw 5 through the spring 4, the other end of the piston 3 has an arc-shaped notch, and the arc-shaped of the piston 3 The notch is engaged with the arc-shaped notch of the gripper chuck 1 through a cylindrical pin 2 , and the screw 5 is threadedly connected to the inner wall of the inner cavity of the cylindrical handle 7 .

Different screw taps can bear different tightening torques, and the expansion and contraction of the spring 4 can be adjusted by screwing in or out of the screw 5, so that the maximum torque value that different screw taps can bear can be specified.

When in use, the cylindrical handle 7 is rotated, because the torque adjustment assembly in the inner chamber of the cylindrical handle 7 is engaged with the gripper chuck 1 through the cylindrical pin 2, the contact between the cylindrical handle 7 and the gripper chuck 1 is limited. Relatively sliding, so that the cylindrical handle 7 drives the grip chuck 1 to rotate, and then the grip chuck 1 drives the tap to rotate through the tap sleeve 10 to realize tapping. During the tapping process, when the tightening torque reaches the maximum that the tap can bear When the torque value is reached, the gripper chuck 1 squeezes the cylindrical pin 2, and the cylindrical pin 2 squeezes the torque adjustment assembly. Due to the elasticity of the torque adjustment assembly, the slip between the gripper chuck 1 and the cylindrical pin 2, even if you continue to turn the handle, Chuck also no longer rotates, thereby avoided the breakage of screw tap that tightening torque is too large.

Preferably, six arc-shaped notches are evenly distributed on the edge of the gripper chuck 1 . Like this, after slipping between gripper chuck 1 and cylindrical pin 2, cylindrical pin 2 can cooperate with next gap quickly and conveniently, then replace screw tap and adjusting screw 5 in time.

Further, a tap sleeve 10 is inserted into the square hole of the gripper chuck 1, and the tap sleeve 10 can be of different types, so that the wrench can be used with different taps.

As shown in Figures 1 and 2, the tapping wrench also includes a second handle 8, which is symmetrically arranged on the ring 9 with the cylindrical handle 7, and on the first Two handles 8 are sleeved with telescopic rods 6, so that the length of the arm of force can be adjusted to reduce the effort in the manual tapping process. Similarly, the telescopic rod 6 can also be sleeved on the cylindrical handle 7, and when using a wrench, the size of the arm of force can be adjusted through the telescopic rod.

To sum up, the torque-adjustable thread tapping wrench provided by the utility model sets the torque adjustment assembly by arranging the gripper chuck 1 inside the ring 9 and matching with the ring 9. In the inner cavity of the cylindrical handle 7 and clamped with the gripper chuck 1 through a cylindrical pin 2, when the tightening torque of the wrench exceeds the maximum torque value that the tap can bear, the gripper chuck 1 and the cylindrical The pin 2 slips, even if the handle continues to be turned, the gripper chuck 1 will not rotate any more, thus preventing the tap from breaking due to excessive torque; through the square hole of the gripper chuck 1 and different types of tap sleeves 10, so that the wrench can be used with different taps; by setting the telescopic rod 6 on the second handle 8 or the cylindrical handle 7, the length of the arm of force can be adjusted, reducing the effort in the manual tapping process.

The above is only a preferred embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, some improvements and modifications can be made without departing from the technical principle of the utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims (8)

1. tap wrench that moment is adjustable, it is characterized in that: it comprises cylindrical shape handle (7), annulus (9), has handgrip chuck (1) and the torque adjusting assembly of arc notch, one end of described cylindrical shape handle (7) and described annulus (9) are connected as a single entity, the center of described handgrip chuck (1) is connected with screw tap, it is inner and match with described annulus (9) that described handgrip chuck (1) is arranged on described annulus (9), described torque adjusting assembly be arranged in the inner chamber of described cylindrical shape handle (7) and with described handgrip chuck (1) by straight pin (2) clamping.

2. tap wrench according to claim 1, it is characterized in that: described torque adjusting assembly comprises piston (3), spring (4) and screw (5), one end of described piston (3) is connected by spring (4) with described screw (5), the other end of described piston (3) has arc notch, by straight pin (2) clamping, described screw (5) is connected with the inner thread of described cylindrical shape handle (7) inner chamber between the arc notch of the arc notch of described piston (3) and described handgrip chuck (1).

3. tap wrench according to claim 2 is characterized in that: be evenly equipped with a plurality of arc notch on the edge of described handgrip chuck (1).

4. tap wrench according to claim 2, it is characterized in that: the center of described handgrip chuck (1) has a square hole, be inserted with wire taper sleeve (10) in the square hole of described handgrip chuck (1), described handgrip chuck (1) is connected with screw tap by described wire taper sleeve (10).

5. according to each described tap wrench of claim 1-4, it is characterized in that: described tap wrench also comprises second handle (8), and described second handle (8) is arranged on the described annulus (9) symmetrically with described cylindrical shape handle (7).

6. according to each described tap wrench of claim 1-4, it is characterized in that: described handgrip chuck (1) is magnetic handgrip chuck.

7. tap wrench according to claim 5 is characterized in that: be arranged with expansion link (6) on the described cylindrical shape handle (7).

8. tap wrench according to claim 5 is characterized in that: be arranged with expansion link (6) on the described second handle (8).

Images