CN206475101U - A fastening bolt prestress adjustable tightening device - Google Patents

Abstract

The utility model relates to a tightening device with adjustable fastening bolt prestressing force, including locking head, connecting rod and handle, the locking head is the ring form, is provided with the hexagon through-hole at the ring form inside, locking head next door is provided with the connecting rod, the connecting rod middle part is provided with big lock nut, the connecting rod afterbody is provided with the handle be provided with movable briquetting in the locking head, the quantity of activity briquetting is three, is separated by the setting respectively and is in every side of hexagon through-hole in the locking head, be connected with little screw rod on the activity briquetting, little screw rod quantity is three, one little screw rod with big lock nut fixed connection. The utility model has the advantages that: the utility model discloses simple structure, convenient to use can adjust the size of spanner through simple adjustment, satisfies not unidimensional bolt's fastening work, has saved the time of looking for the spanner, has improved work efficiency.

Description

A fastening bolt prestress adjustable tightening device

technical field

The utility model relates to the technical field of assembly tool design, in particular to a fastening bolt prestress adjustable tightening device.

Background technique

A wrench is a commonly used installation and removal tool. Hand tools for turning bolts, screws, nuts, and other open or socketed fasteners whose threads hold bolts or nuts tightly by the principle of leverage. The wrench is usually formed with an opening or a sleeve hole for clamping a bolt or a nut at one or both ends of the handle. When in use, an external force is applied to the handle along the thread rotation direction to twist the bolt or nut.

At present, the tightening device used to tighten bolts on the market has no adjustable wrench except the open-end wrench. However, when the open-end wrench is adjusted, due to the large movable gap, it is easy to slip when tightening, causing the arm to bend. Bump, very unsafe.

Contents of the invention

The purpose of this utility model is to provide a fastening bolt prestress adjustable tightening device in order to solve the above problems.

In order to achieve the above object, the utility model provides the following technical solutions:

A fastening bolt prestress adjustable tightening device, including a locking head, a connecting rod and a handle, the locking head is in the shape of a ring, and a hexagonal through hole is arranged inside the ring, the lock The connecting rod is arranged next to the tight head, the middle part of the connecting rod is provided with a large lock nut, the tail of the connecting rod is provided with the handle, and a movable pressing block is arranged in the locking head. The number of movable briquetting blocks is three, which are separately arranged in the locking head on each side of the hexagonal through hole. The movable briquetting blocks are connected with small screws, and the number of small screws is three, one The small screw rod is fixedly connected to the large locking nut, and the other two small screw rods are respectively connected to fixing nuts, and small locking nuts are arranged outside the fixing nuts.

Using the above-mentioned adjustable prestressed tightening device for fastening bolts, in the process of fastening bolts of different sizes, it is only necessary to adjust the large lock nut and the small lock nut to adjust the movable pressure. The position of the block can change the tightening size of the wrench to achieve the purpose of adjustment.

In order to further improve the function of the fastening bolt prestress adjustable tightening device, the connecting rod is welded on the locking head, the large locking nut is installed in the middle of the connecting rod through a chute, and the handle passes through Bolts are fixedly installed at the tail of the connecting rod, and the movable pressing block is installed inside the locking head through a slide groove.

In order to further improve the function of the tightening device with adjustable prestress of fastening bolts, the locking head is made of alloy material and is made through quenching treatment.

In order to further improve the function of the tightening device with adjustable prestress of fastening bolts, the upper end of the movable pressing block is arc-shaped.

The beneficial effects that the utility model has include:

The utility model has the advantages of simple structure and convenient use, and the size of the wrench can be adjusted through simple adjustment, so as to meet the fastening work of bolts of different sizes, save the time of searching for the wrench, and improve work efficiency.

Description of drawings

Fig. 1 is a front view of a fastening bolt prestress adjustable tightening device described in the utility model;

Fig. 2 is a partial schematic diagram of a fastening bolt prestress adjustable tightening device described in the utility model.

The reference signs are explained as follows:

1. Handle; 2. Connecting rod; 3. Large locking nut; 4. Locking head; 5. Hexagonal through hole; 6. Small locking nut; 7. Fixed nut; 8. Movable pressing block; 9 , small screw.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1-2, a fastening bolt prestress adjustable tightening device includes a locking head 4, a connecting rod 2 and a handle 1. The locking head 4 is in the shape of a ring and is set inside the ring. There is a hexagonal through hole 5, and a connecting rod 2 is arranged next to the locking head 4. The connecting rod 2 is used to increase the rotational torque and install a large lock nut 3. The middle part of the connecting rod 2 is provided with a large lock nut 3, and the large lock The tightening nut 3 is used to adjust the position of the movable pressing block 8. The tail of the connecting rod 2 is provided with a handle 1. The handle 1 is used to increase the friction between the hand and the hand during fastening work. A movable clamp is arranged in the locking head 4. The briquetting block 8 and the movable briquetting block 8 are used for convenient adjustment so as to fasten bolts of different sizes. The quantity of the movable briquetting block 8 is three, and the locking head 4 arranged on each side of the hexagonal through hole 5 is separated from each other. Inside, the movable briquetting block 8 is connected with a small screw 9, and the small screw 9 is used to drive the movable briquetting 8 to move. The small screw rods 9 are connected to the fixing nuts 7 respectively, and the fixing nuts 7 are used to fix the small screw rods 9 , and a small locking nut 6 is arranged on the outside of the fixing nut 7 , and the small locking nut 6 is used for adjusting the small screw rod 9 .

Using the above-mentioned adjustable tightening device for fastening bolt prestress, in the process of tightening bolts of different sizes, only the large lock nut 3 and the small lock nut 6 need to be adjusted to adjust the position of the movable pressure block 8 , the fastening size of the wrench can be changed to achieve the purpose of adjustment.

In order to further improve the function of the fastening bolt prestress adjustable tightening device, the connecting rod 2 is welded on the locking head 4, the large lock nut 3 is installed in the middle of the connecting rod 2 through the chute, and the handle 1 is fixed and installed on the connecting rod 2 through the bolt. Rod 2 afterbody, movable briquetting block 8 is installed in locking head 4 inside by chute, and locking head 4 is alloy material, and is made through quenching treatment, and movable briquetting block 8 upper end is arc-shaped.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their effects.

Claims (4)

1. An adjustable prestressed tightening device for fastening bolts, comprising a locking head, a connecting rod and a handle, characterized in that: the locking head is in the shape of a ring, and a hexagonal shape is arranged inside the ring. A through hole, the connecting rod is provided beside the locking head, a large locking nut is provided in the middle of the connecting rod, the handle is provided at the tail of the connecting rod, and a Movable briquetting, the quantity of described movable briquetting is three, is separately arranged in the described locking head of each side of described hexagonal through-hole, and described movable briquetting is connected with small screw rod, and small screw rod The number is three, one of the small screw rods is fixedly connected with the big lock nut, and the other two small screw rods are respectively connected with fixing nuts, and small lock nuts are arranged outside the fixing nuts. 2. A fastening bolt prestress adjustable tightening device according to claim 1, characterized in that, the connecting rod is welded on the locking head, and the large locking nut is installed on the locking head through a chute. In the middle part of the connecting rod, the handle is fixedly installed on the tail of the connecting rod through bolts, and the movable pressing block is installed inside the locking head through a chute. 3 . The prestressed adjustable tightening device for fastening bolts according to claim 1 , wherein the locking head is made of alloy material and is made through quenching treatment. 4 . 4 . The tightening device with adjustable prestress for fastening bolts according to claim 1 , wherein the upper end of the movable pressing block is arc-shaped. 5 .