CN207616496U - A kind of diagonal tools for bolts ' pretension device of adjustable pitch formula - Google Patents

Abstract

The utility model discloses an adjustable-distance diagonal bolt pre-tightening device, which comprises an inverted Y-shaped main casing. The main casing includes a main passage and two branch passages symmetrically connected at the bottom of the main passage. The main passage is interspersed with a Stage transmission shaft, the bottom of the primary transmission shaft is connected with two secondary transmission shafts through the primary bevel gear transmission group, the two secondary transmission shafts are respectively arranged in two branch channels, and the two secondary transmission shafts are respectively connected to a The third-stage transmission shaft, the third-stage transmission shaft is connected to the fourth-stage transmission shaft through the second-stage bevel gear transmission group, the bottom of the fourth-stage transmission shaft is connected with a sleeve, and the outside of the third-stage transmission shaft and the fourth-stage transmission shaft is provided with a secondary casing, and The secondary housing and the main housing are connected by adjusting screws. The utility model can make the symmetrically arranged bolts be tightened synchronously, so as to achieve the purpose of evenly loading the bolt groups.

Description

An Adjustable Diagonal Bolt Pretensioning Device

technical field

The utility model belongs to the field of mechanical tools, in particular to an adjustable-distance diagonal bolt pre-tightening device.

Background technique

At present, many devices with sealing rings often use a symmetrical bolt group connection method. This symmetrical bolt group arrangement is particularly prominent in mechanical, hydraulic assembly, vehicles, and aerospace. The pre-tightening of symmetrical bolt groups often requires installing each bolt diagonally to ensure that each bolt and the sealing ring under the contact surface are well stressed. Using the traditional method and using an ordinary wrench is often inefficient and inconvenient to operate. , it is difficult to meet the needs of use.

Utility model content

In order to solve the problems of the prior art, the utility model provides an adjustable-distance diagonal bolt pre-tightening device, which can make the symmetrically arranged bolts be tightened synchronously, so as to achieve the purpose of evenly loading the bolt group.

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

An adjustable-distance diagonal bolt pretensioning device includes an inverted Y-shaped main casing. The main casing includes a main passage and two branch passages symmetrically connected at the bottom of the main passage. The bottom of the stage transmission shaft is connected with two secondary transmission shafts through a primary bevel gear transmission group, and the two secondary transmission shafts are respectively arranged in two branch channels, and the two secondary transmission shafts are respectively connected to a tertiary transmission shaft, The third-stage transmission shaft is connected to the fourth-stage transmission shaft through the second-stage bevel gear transmission group. The bottom of the fourth-stage transmission shaft is connected with a sleeve. Attached by adjusting screw.

Further, the primary transmission shaft is connected with the main passage through an angular contact ball bearing seat set.

Further, the secondary transmission shaft and the tertiary transmission shaft are connected by splines.

Further, the secondary transmission shaft, the tertiary transmission shaft and the fourth transmission shaft are axially fixed to the secondary housing through the shaft ends.

Compared with the prior art, the utility model has the following beneficial technical effects:

The utility model is simple in structure and reasonable in design, and can work on two diagonal bolts at the same time. Adjusting the distance between the two sleeves can adapt to different pitch environments, and it is simple and convenient to use, improving work efficiency.

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is a sectional view of plane A-A in Fig. 1 of the present utility model.

Among them, 1. Primary transmission shaft; 2. Primary bevel gear transmission group; 3. Main casing; 4. Secondary casing; 5. Secondary bevel gear transmission group; 6. Sleeve; 7. Fourth-stage transmission shaft; 8 , Adjusting screw; 9, angular contact ball bearing group; 10, secondary drive shaft; 11, tertiary drive shaft.

Detailed ways

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

Referring to Figures 1 and 2, an adjustable-distance diagonal bolt pretensioning device includes a primary transmission shaft 1, which is connected to the main housing 3 through an angular contact ball bearing set 9, and the primary transmission shaft 1 The lower part of the drive shaft is connected to the left and right two secondary transmission shafts 10 through the primary bevel gear transmission group 2, the secondary transmission shaft 10 cooperates with the external spline of the tertiary transmission shaft 11 through the internal spline, and the tertiary transmission shaft 11 is connected to the four-stage transmission shaft. The first-stage transmission shaft 7 is connected through the second-stage bevel gear transmission group 5, the sleeve 6 is arranged under the fourth-stage transmission shaft 7, the third-stage transmission shaft 11 and the fourth-stage transmission shaft 7 are wrapped by the secondary casing 4, and the secondary casing 4 is connected with the main casing 3 is fixed by the adjusting screw 8, and the secondary transmission shaft 10, the tertiary transmission shaft 11 and the fourth transmission shaft 7 are axially fixed with the secondary housing 4 through the shaft ends.

Below in conjunction with embodiment, the utility model using process is described in detail:

Before use, replace the suitable sleeve 6, and then change the protruding length of the secondary housing 4 by adjusting the adjusting screw 8, and then adjust the distance between the two sleeves 6 to meet the actual work needs. When in use, the primary transmission shaft 1 is rotated by using tools such as a wrench, the primary transmission shaft 1 drives the secondary transmission shaft 10 to rotate through the primary bevel gear transmission group 2, and the secondary transmission shaft 10 drives the third transmission shaft through spline cooperation. The first-stage transmission shaft 11 rotates, the third-stage transmission shaft 11 drives the fourth-stage transmission shaft 7 to rotate through the second-stage bevel gear transmission group 5, and the fourth-stage transmission shaft 7 further drives the sleeve 6 to rotate, thereby completing the purpose of pre-tightening the diagonal bolts .

Claims (4)

1. An adjustable-diagonal bolt pretensioning device is characterized in that it includes an inverted Y-shaped main casing (3), and the main casing (3) includes a main channel and two branches symmetrically connected to the bottom of the main channel channel, the main channel is interspersed with a primary transmission shaft (1), the bottom of the primary transmission shaft (1) is connected with two secondary transmission shafts (10) through a primary bevel gear transmission group (2), and the two secondary transmission shafts (10) The shafts (10) are respectively arranged in two branch passages, and the two secondary transmission shafts (10) are respectively connected to a tertiary transmission shaft (11), and the tertiary transmission shaft (11) passes through the secondary bevel gear transmission group (5) Connected to the fourth-stage transmission shaft (7), the bottom of the fourth-stage transmission shaft (7) is connected with a sleeve (6), and the outside of the third-stage transmission shaft (11) and the fourth-stage transmission shaft (7) is provided with a secondary casing (4) , and the secondary housing (4) and the main housing (3) are connected by adjusting screws (8). 2. An adjustable distance diagonal bolt pretensioning device according to claim 1, characterized in that the primary transmission shaft (1) is connected to the main channel through an angular contact ball bearing seat group (9). 3. An adjustable distance diagonal bolt pretensioning device according to claim 1, characterized in that the secondary transmission shaft (10) and the tertiary transmission shaft (11) are connected by splines. 4. A kind of adjustable distance type diagonal bolt pretensioning device according to claim 1, characterized in that, the secondary transmission shaft (10), the tertiary transmission shaft (11) and the fourth transmission shaft (7) are all Axial fixation is carried out through the shaft end and the secondary housing (4).