阅读说明：本技术 一种螺母预拧紧装置 (Nut pre-tightening device ) 是由 丛长林 谭昌春 唐豪瑜 于 2020-04-26 设计创作，主要内容包括：本发明公开了一种螺母预拧紧装置,其包括呈筒状的本体,所述本体的外筒壁上固定连接有固定座,所述本体的内筒壁上转动安装有齿轮拨圈,所述齿轮拨圈的内筒壁形状与螺母的外筒壁形状相匹配,所述固定座上转动安装有与齿轮拨圈相啮合的齿轮,所述齿轮上设有用于与驱动装置连接的驱动结构。其目的是为了提供一种螺母预拧紧装置,工作人员使用该装置能够快速地将螺母旋至螺栓根部,省时省力。(The invention discloses a nut pre-tightening device which comprises a cylindrical body, wherein a fixed seat is fixedly connected to the outer cylinder wall of the body, a gear shifting ring is rotatably installed on the inner cylinder wall of the body, the shape of the inner cylinder wall of the gear shifting ring is matched with that of the outer cylinder wall of a nut, a gear meshed with the gear shifting ring is rotatably installed on the fixed seat, and a driving structure used for being connected with a driving device is arranged on the gear. Its purpose is in order to provide a nut device of screwing up in advance, and the staff uses the device can revolve the nut to the bolt root fast, labour saving and time saving.)

1. The utility model provides a nut is tight device in advance which characterized in that: the nut comprises a cylindrical body, wherein a fixed seat is fixedly connected to the outer cylinder wall of the body, a gear shifting ring is rotatably installed on the inner cylinder wall of the body, the shape of the inner cylinder wall of the gear shifting ring is matched with that of the outer cylinder wall of the nut, a gear meshed with the gear shifting ring is rotatably installed on the fixed seat, and a driving structure used for being connected with a driving device is arranged on the gear.

2. The nut pre-tightening device according to claim 1, wherein the manner in which the gear rim is rotatably mounted in the body is: the gear shifting ring, the bearing and the check ring are sequentially installed on the inner cylinder wall of the body from bottom to top, a first boss and a second boss are sequentially arranged on the inner cylinder wall of the body from bottom to top, the gear shifting ring is located on the first boss, the outer ring of the bearing is located on the second boss, a gap is reserved between the bottom surface of the inner ring of the bearing and the top surface of the gear shifting ring, the check ring is embedded in the inner cylinder wall of the body, and the bottom surface of the check ring is abutted to the top surface of the outer ring of the bearing.

3. Nut pre-tightening device according to claim 1 or 2, characterized in that: the gear is dialled the inside wall upper end of circle and is equipped with radial flange, be equipped with the arc recess of arranging along vertical direction on the inside wall of circle is dialled to the gear.

4. The nut pre-tightening device according to claim 3, characterized in that: six arc grooves are formed in the arc groove, and the arc grooves are evenly distributed along the circumferential direction of the inner side wall of the gear shifting ring.

5. The nut pre-tightening device according to claim 4, characterized in that: the gear comprises a first gear and a second gear which are meshed with each other, a through hole is formed in the cylinder wall of the body and is located at the fixed seat, the second gear penetrates through the through hole to be meshed with the gear shifting ring, and the driving structure is arranged on the first gear.

6. The nut pre-tightening device according to claim 5, characterized in that: the fixed first gear shaft that is equipped with on the first gear, first gear shaft passes through the axle sleeve and rotates and install on the fixing base, outside the upper end of first gear shaft extended to the fixing base, the up end of first gear shaft was equipped with the jack, the jack does drive structure.

7. The nut pre-tightening device according to claim 6, characterized in that: and a second gear shaft is fixedly arranged on the second gear, and the second gear shaft is rotatably arranged on the fixed seat through a shaft sleeve.

8. The nut pre-tightening device according to claim 7, characterized in that: the fixing seat comprises an upper fixing seat and a lower fixing seat which are fixedly connected, the first gear and the second gear are installed between the upper fixing seat and the lower fixing seat, the upper end and the lower end of the first gear shaft are respectively installed on the upper fixing seat and the lower fixing seat, the upper end of the first gear shaft extends out of the upper fixing seat, and the upper end and the lower end of the second gear shaft are respectively installed on the upper fixing seat and the lower fixing seat.

9. The nut pre-tightening device according to claim 8, characterized in that: go up the fixing base and be equipped with unsmooth cooperation structure with down between the fixing base respectively and the body, go up the fixing base and pass through screw and body fixed connection respectively with lower fixing base, go up the fixing base and pass through screw fixed connection with lower fixing base.

Technical Field

The present invention relates to a fastening device, and more particularly to a device for pre-tightening nuts.

Background

When large flange bolts are fastened, the nuts need to be screwed by hand in advance and then screwed to a specified torque or load by using a hydraulic tool, and when the bolts are long and the bolts are many, the workload and the working strength for screwing the nuts by hand are relatively large.

Disclosure of Invention

The invention aims to provide a nut pre-tightening device, which can be used by a worker to quickly screw a nut to the root of a bolt, and is time-saving and labor-saving.

The nut pre-tightening device comprises a cylindrical body, wherein a fixed seat is fixedly connected to the outer cylinder wall of the body, a gear shifting ring is rotatably mounted on the inner cylinder wall of the body, the shape of the inner cylinder wall of the gear shifting ring is matched with that of the outer cylinder wall of the nut, a gear meshed with the gear shifting ring is rotatably mounted on the fixed seat, and a driving structure used for being connected with a driving device is arranged on the gear.

The invention discloses a nut pre-tightening device, wherein a gear shifting ring is rotatably arranged in a body in a mode that: the gear shifting ring, the bearing and the check ring are sequentially installed on the inner cylinder wall of the body from bottom to top, a first boss and a second boss are sequentially arranged on the inner cylinder wall of the body from bottom to top, the gear shifting ring is located on the first boss, the outer ring of the bearing is located on the second boss, a gap is reserved between the bottom surface of the inner ring of the bearing and the top surface of the gear shifting ring, the check ring is embedded in the inner cylinder wall of the body, and the bottom surface of the check ring is abutted to the top surface of the outer ring of the bearing.

According to the nut pre-tightening device, the upper end of the inner side wall of the gear shifting ring is provided with the radial flange, and the inner side wall of the gear shifting ring is provided with the arc-shaped groove which is arranged along the vertical direction.

According to the nut pre-tightening device, the number of the arc-shaped grooves is six, and the six arc-shaped grooves are uniformly distributed along the circumferential direction of the inner side wall of the gear shifting ring.

According to the nut pre-tightening device, the gear comprises a first gear and a second gear which are meshed with each other, a through hole is formed in the cylinder wall of the body and is located at the fixed seat, the second gear penetrates through the through hole to be meshed with the gear shifting ring, and the driving structure is arranged on the first gear.

According to the nut pre-tightening device, the first gear is fixedly provided with the first gear shaft, the first gear shaft is rotatably installed on the fixed seat through the shaft sleeve, the upper end of the first gear shaft extends out of the fixed seat, the upper end face of the first gear shaft is provided with the insertion hole, and the insertion hole is of the driving structure.

According to the nut pre-tightening device, the second gear shaft is fixedly arranged on the second gear, and the second gear shaft is rotatably arranged on the fixed seat through the shaft sleeve.

The nut pre-tightening device comprises a fixed seat, a first gear, a second gear, an upper fixed seat, a lower fixed seat, a first gear shaft, a second gear shaft, a nut pre-tightening device and a nut pre-tightening device, wherein the fixed seat comprises an upper fixed seat and a lower fixed seat which are fixedly connected, the first gear and the second gear are installed between the upper fixed seat and the lower fixed seat, the upper end and the lower end of the first gear shaft are respectively installed on the upper fixed seat and the lower fixed seat, the upper end of the first gear shaft extends out of the upper fixed.

According to the nut pre-tightening device, concave-convex matching structures are arranged between the upper fixing seat and the body and between the lower fixing seat and the body respectively, the upper fixing seat and the lower fixing seat are fixedly connected with the body through screws respectively, and the upper fixing seat and the lower fixing seat are fixedly connected through screws.

The nut pre-tightening device comprises a body and a fixed seat which are fixedly connected, wherein a gear shifting ring is rotatably installed on the inner cylinder wall of the body, a gear meshed with the gear shifting ring is rotatably installed in the fixed seat, when the nut pre-tightening device is used, a worker can sleeve the gear shifting ring on a nut to be tightened and then is connected with a driving device through a driving structure on the gear, the driving device drives the gear to rotate, and the gear is meshed with the gear shifting ring, so that the gear can drive the gear shifting ring to rotate, the gear shifting ring drives the nut to rotate along a bolt until the nut is screwed to the root of the bolt, the speed is high, and time and labor are saved.

The invention will be further explained with reference to the drawings.

Drawings

FIG. 1 is a front view of the nut pre-tightening apparatus of the present invention;

FIG. 2 is a top plan view of the nut pre-tightening apparatus of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a perspective view of the nut pre-tightening apparatus of the present invention;

FIG. 5 is a perspective view of the nut pre-tightening device of the present invention (with the body and the anchor base hidden);

FIG. 6 is a top view of the gear rim of the present invention;

FIG. 7 is a bottom plan view of the gear rim of the present invention;

fig. 8 is a perspective view of the gear rim of the present invention.

Detailed Description

As shown in fig. 1 and fig. 2-5, the nut pre-tightening device of the present invention includes a cylindrical body 3, a fixed seat is fixedly connected to an outer cylindrical wall of the body 3, a gear dial ring 10 is rotatably mounted on an inner cylindrical wall of the body 3, a shape of an inner cylindrical wall of the gear dial ring 10 is matched with a shape of an outer cylindrical wall of the nut, a gear engaged with the gear dial ring 10 is rotatably mounted on the fixed seat, and a driving structure for connecting with a driving device is provided on the gear. The gear ring 10 is cylindrical, and gear teeth engaged with the gear are arranged on the outer cylinder wall of the gear ring.

As shown in fig. 3, the manner of rotatably mounting the gear rim 10 in the body 3 is as follows: the gear shifting ring 10, the bearing 6 and the check ring 5 are sequentially installed on the inner cylinder wall of the body 3 from bottom to top, a first boss 11 and a second boss 9 are sequentially arranged on the inner cylinder wall of the body 3 from bottom to top, the gear shifting ring 10 is located on the first boss 11, the outer ring of the bearing 6 is located on the second boss 9, a gap is reserved between the bottom surface of the inner ring of the bearing 6 and the top surface of the gear shifting ring 10, the check ring 5 is embedded in the inner cylinder wall of the body 3, and the bottom surface of the check ring 5 is abutted to the top surface of the outer ring of the bearing 6.

The effect of first boss 11 lies in preventing that gear dial ring 10 from droing from body 3, in the time of the use, revolve 1 to 2 threads on the screw rod with the nut earlier, later dial ring 10 along from last to the direction cover on the nut down, continue to apply decurrent pressure to body 3 until the nut drives gear dial ring 10 upward movement and bearing 6 inner circle offset, gear dial ring 10 can rotate along with bearing 6 inner circle like this, along with the rotation of nut, bearing 6 is passed on the top of bolt, retaining ring 5 extends to body 3 top, treat to revolve the nut to the bolt root after, follow upward movement body 3 again and until taking out from the bolt top down. And finally, screwing the nut by using a hydraulic screwing device.

As shown in fig. 3, the upper end of the inner side wall of the gear ring 10 is provided with a radial flange 8, and when the gear ring 10 is sleeved on the nut and continues to apply a downward pressure to the body 3, the nut can push against the radial flange 8 to enable the gear ring 10 to move upwards until abutting against the inner ring of the bearing 6. When the radial flange 8 is not provided, the nut can also move upwards against the dial ring 10 by friction between itself and the dial ring 10 until it abuts against the inner ring of the bearing 6.

As shown in fig. 6, and in conjunction with fig. 7 and 8, the inner side wall of the gear ring 10 is provided with an arc-shaped groove 12 arranged along the vertical direction. Six arc-shaped grooves 12 are formed, and the six arc-shaped grooves 12 are uniformly arranged along the circumferential direction of the inner side wall of the gear shifting ring 10. The six arc-shaped grooves 12 correspond to the hexagonal nut in shape, so that the gear shifting ring 10 is conveniently sleeved on the nut and drives the nut to rotate.

As shown in fig. 3 and 5, the gear includes a first gear 13 and a second gear 14 that are engaged with each other, a through hole is formed in the wall of the body 3, the through hole is located at the fixing seat, the second gear 14 passes through the through hole to be engaged with the gear dial ring 10, and the first gear 13 is provided with the driving structure. The second gear wheel 14 meshes with gear teeth on the outer cylinder wall of the ring gear 10.

As shown in fig. 5, in the nut pre-tightening device of the present invention, a first gear shaft 2 is fixedly disposed on the first gear 13, the first gear shaft 2 is rotatably mounted on a fixing base through a bushing, an upper end of the first gear shaft 2 extends out of the fixing base, an insertion hole 7 is disposed on an upper end surface of the first gear shaft 2, and the insertion hole 7 is the driving structure.

As shown in fig. 5, in the nut pre-tightening device of the present invention, a second gear shaft 15 is fixedly disposed on the second gear 14, and the second gear shaft 15 is rotatably mounted on the fixing base through a shaft sleeve.

As shown in fig. 4, the fixing seat includes an upper fixing seat 1 and a lower fixing seat 4 fixedly connected to each other, the first gear 13 and the second gear 14 are installed between the upper fixing seat 1 and the lower fixing seat 4, the upper end and the lower end of the first gear shaft 7 are respectively installed on the upper fixing seat 1 and the lower fixing seat 4, the upper end of the first gear shaft 2 extends out of the upper fixing seat 1, and the upper end and the lower end of the second gear shaft 15 are also respectively installed on the upper fixing seat 1 and the lower fixing seat 4.

As shown in fig. 4, in the nut pre-tightening device of the present invention, concave-convex matching structures are respectively disposed between the upper fixing seat 1 and the lower fixing seat 4 and the body 3, so as to enhance the matching degree between the two. Go up fixing base 1 and lower fixing base 4 respectively through screw and body 3 fixed connection, go up fixing base 1 and lower fixing base 4 through screw fixed connection.

When the nut screwing device is used, a worker only needs to screw the nut into 1 to 2 threads of the bolt, then the gear shifting ring 10 is sleeved on the nut to be screwed, then a driving shaft of the electric rotating mechanism (namely a driving device) is inserted into the jack 7 on the upper end face of the first gear shaft 2 to drive the first gear 13 to rotate, the first gear 13 drives the second gear 14 to rotate due to the fact that the first gear 13 is meshed with the second gear 14, and the second gear 14 drives the gear shifting ring 10 to rotate due to the fact that the second gear 14 is meshed with the gear shifting ring 10, so that the gear shifting ring 10 drives the nut to rotate along the bolt until the nut is screwed to the root of the bolt. And then the nut is screwed up through a hydraulic tightening device. Wherein the first gear wheel 13 and the second gear wheel 14, in addition to the gearing, are able to reduce the high speed rotation of the drive means to a suitable rotational speed for the rim gear 10 to drive the nut.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.