CN115899053A - Self-locking bolt structure convenient for connecting standard knot of tower crane - Google Patents

Abstract

The invention discloses a self-locking bolt structure convenient for connecting a standard knot of a tower crane, which comprises a slotted optical head screw, a nut in threaded connection with the top end of the slotted optical head screw, a fixing sleeve in inserted connection and matching with the bottom end of the slotted optical head screw, a locking slide block for clamping the slotted optical head screw to the fixing sleeve, an elastic ring for limiting the locking slide block to the fixing sleeve, and a positioning pin for relatively fixing the fixing sleeve and the bolt sleeve of the standard knot. The self-locking bolt structure has the characteristics of simple structure, convenience in installation and high reliability, and can reduce the number of construction people and improve the installation efficiency.

Description

A Self-locking Bolt Structure Convenient for Connecting Standard Sections of Tower Cranes

technical field

The invention relates to the technical field of tower cranes, in particular to a self-locking bolt structure for connecting standard joints of tower cranes.

Background technique

At present, there are problems in the connection of standard sections in the process of jacking and adding sections of integral tower cranes: during the process of jacking and adding sections of integral tower cranes, the standard sections are usually fixedly connected by threaded bolts and nuts. When bolts and nuts are connected to standard joints, bolt installation, nut installation, and pre-tightening are all done manually. During the nut installation process, one worker usually uses a wrench to fix the bolt head, and one worker uses a torque wrench to complete the nut installation and pre-tightening. During the whole installation process, the operating position and station size of the installers are relatively narrow, which is not only a high-altitude operation, but also a side-by-side operation, which makes it inconvenient for two people to operate. The connection between the two standard sections needs to be installed with 8 bolts. Working at heights tends to distract workers from their construction efforts, and sometimes workers miss installation, causing safety hazards.

Contents of the invention

In view of this, the present invention provides a self-locking bolt structure that is convenient for connecting the standard section of the tower crane. Problems such as missing installations occurred during the construction process.

The present invention adopts following concrete technical scheme:

A self-locking bolt structure convenient for connecting standard sections of tower cranes, the self-locking bolt structure includes:

Slotted bald screw, the top end is provided with external threads, the bottom end is provided with a first chamfer and the outer peripheral surface is evenly distributed with at least two grooves;

A nut is provided with an internal thread mated with the external thread;

The fixed sleeve is provided with a central hole that fits with the bottom end of the slotted bald screw and a recessed table hole that corresponds to the groove one by one; the recessed table hole communicates with the central hole and the fixed sleeve outside of

The locking slider is mated with the concave table hole; the length of the locking slider is equal to the sum of the depths of the concave table hole and the groove; the locking slider is on the outer end surface away from the nut Arranged with arc grooves;

an elastic ring, the elastic ring is sleeved on the outer peripheral side of the fixed sleeve, and elastically compressed in the arc-shaped groove;

The positioning pin is fixedly connected to the end surface of the fixed sleeve facing the nut, and is used for plugging and mating with the bolt sleeve of the standard section;

The first chamfer enables the slotted bald screw to enter the bottom end of the central hole of the fixed sleeve by its own weight; when the bottom end of the slotted bald screw is inserted into the central hole of the fixed sleeve, the Under the elastic force of the elastic ring, the inner end of the locking slider is inserted into the corresponding groove, and the slotted bald screw is locked in the fixing sleeve.

Furthermore, the cross-sectional shape of the locking slider is rectangular, and a second chamfer is provided on a vertical side facing the inner end of the groove;

When the locking slider locks the slotted bald head screw to the fixing sleeve, the second chamfer enables the slotted bald head screw to rotate only to one side in the circumferential direction, and through the rotation, the locking The slider can slide out from the groove to realize the unlocking of the slotted bald head screw and the fixing sleeve.

Furthermore, the fixed sleeve is a cylindrical structure, and the outer peripheral surface is provided with an annular groove along the circumferential direction;

The recess hole is located in the annular groove;

The elastic ring is sleeved in the annular groove.

Furthermore, a tapered guide block is provided on the top of the nut.

Furthermore, the elastic ring is an annular spring;

A plurality of positioning pins distributed along the circumferential direction are arranged on the end surface of the nut.

Beneficial effect:

1. The self-locking bolt structure of the present invention is used to connect adjacent standard sections in tower cranes. The self-locking bolt structure includes a slotted bald screw, a nut threaded with the top of the slotted bald screw, and a bottom of the slotted bald screw. The fixed sleeve for plug-in fit, the locking slider for clamping the slotted bald head screw to the fixed sleeve, and the elastic ring for restricting the locking slider to the fixed sleeve, and the fixed sleeve is opposite to the bolt sleeve of the standard section Fixed positioning pin; when the above self-locking bolt structure is used to connect adjacent standard sections, the slotted bald screw passes through the bolt sleeves of the two adjacent standard sections, one end of the slotted bald screw is threaded with the nut, and the other end is locked The slider and the fixed sleeve are clipped and fixed, so as to realize the fixed connection of the two standard sections; the specific process of using the self-locking bolt structure to connect the adjacent standard sections is as follows: During the jacking and adding of the tower crane, the standard section is in the When the ground is on the ground, first install the locking slider in the recessed hole of the fixed sleeve through the elastic ring, then fix the fixed sleeve on the bottom of the top bolt sleeve of the lower standard section in the two adjacent standard sections, and then thread the nut On the slotted bald head screw, place the slotted bald head screw with nuts in the bottom bolt sleeve of the upper standard section of the two adjacent standard sections, hoist, introduce and place the standard section, and finally place the slotted bald head The bottom end of the screw is inserted into the center hole of the fixing sleeve, and locked by locking the slider into the groove to realize the fixed connection between the bottom end of the slotted bald screw and the fixing sleeve, and then the nut is tightened to realize the quick connection between the standard joints. connect. The above self-locking bolt structure adopts slotted bald head screw, nut, fixing sleeve, locking slider, elastic ring and positioning pin to realize the quick connection of the standard joint, and pre-installs each connecting part on the standard joint. Therefore, the self-locking bolt The structure has the characteristics of simple structure, convenient installation, and high reliability. At the same time, the self-locking bolt structure of the present invention can reduce the number of construction workers, improve installation efficiency, and avoid problems such as missing installation during construction.

2. The cross-sectional shape of the locking slider of the self-locking bolt structure of the present invention is a rectangle, and a second chamfer is provided on a vertical edge towards the inner end of the groove; when the locking slider locks the slotted bald screw rod When using the fixed sleeve, the second chamfer enables the slotted bald screw to rotate only to one side in the circumferential direction, and through the rotation, the locking slider can slide out of the groove to realize the unlocking of the slotted bald screw and the fixed sleeve; There is a second chamfer at the end where the locking slider is inserted into the groove of the slotted bald screw. The second chamfer can restrict the slotted bald screw to rotate in one direction, which facilitates the slotted bald screw during the connection process. Angle adjustment, and the locking slider can be slid out of the groove of the slotted bald screw through one-way rotation to realize the disassembly and assembly of the slotted bald screw and the fixed sleeve; therefore, the above self-locking bolt structure is not only convenient for installation, but also It is also possible to improve the assembly and disassembly efficiency.

3. The fixed sleeve of the self-locking bolt structure of the present invention is a cylindrical structure, and an annular groove along the circumferential direction is arranged on the outer peripheral surface of the fixed sleeve, the concave table hole is located in the annular groove, and the elastic ring is sleeved in the annular groove, so , the position of the elastic ring can be limited by the annular groove on the outer peripheral surface of the fixing sleeve, and the elastic ring is always kept in the annular groove, so that the locking slider can be securely snapped into the groove of the slotted bald screw, ensuring the standard joint The reliability and stability of the connection between them can prevent safety accidents due to the detachment of the elastic ring.

Description of drawings

Fig. 1 is the connection structure schematic diagram of self-locking bolt structure of the present invention when connecting standard section;

Fig. 2 is the schematic diagram of partial enlarged structure of part A in Fig. 1;

Fig. 3 is the structural representation of self-locking bolt structure of the present invention;

Figure 4 is a schematic diagram of the exploded structure of the bottom of the slotted bald screw and the fixing sleeve.

Among them, 1-upper standard section, 2-lower standard section, 3-bolt sleeve, 4-slotted bald screw, 5-first chamfer, 6-groove, 7-nut, 8-fixing sleeve, 9-center Hole, 10-concave hole, 11-lock slider, 12-arc groove, 13-elastic ring, 14-locating pin, 15-second chamfer, 16-ring groove, 17-tapered guide block

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and examples.

The embodiment of the present invention provides a self-locking bolt structure that is convenient for connecting the standard sections of tower cranes. As shown in Figure 1 and Figure 2, the self-locking bolt structure is used to connect two vertically Standard section, the standard section located on the upper side of two adjacent standard sections is defined as upper standard section 1, and the lower standard section is defined as lower standard section 2, the upper and lower of upper standard section 1 and lower standard section 2 Two bolt sleeves 3 are fixedly installed at both ends and four corners, and the fixed connection between the upper standard section 1 and the lower standard section 2 is realized through the slotted bald screw rod 4 pierced in the bolt sleeve 3;

As shown in Figure 3 and Figure 4, the self-locking bolt structure includes a slotted bald screw 4, a nut 7, a fixing sleeve 8, a locking slider 11, an elastic ring 13 and a positioning pin 14; wherein:

The top end of the slotted bald screw 4 is provided with external threads, the bottom end is provided with a first chamfer 5 and at least two grooves 6 are evenly distributed on the outer peripheral surface;

Nut 7 is provided with the internal thread that cooperates with external thread thread, and nut 7 realizes the fixed connection with slotted bald screw rod 4 by the threaded connection of internal thread and external thread; The shape guide block 17 can guide the tool for tightening the nut 7, so that the tightening tool can be quickly sleeved on the outer peripheral side of the nut 7;

The fixed sleeve 8 is provided with a central hole 9 that fits in with the bottom end of the slotted bald screw 4 and a concave table hole 10 corresponding to the groove 6; the concave table hole 10 communicates with the outside of the central hole 9 and the fixed sleeve 8 ;

The locking slider 11 is mated with the concave table hole 10; the length of the locking slider 11 is equal to the sum of the depths of the concave table hole 10 and the groove 6; the locking slider 11 is provided with an arc-shaped groove on the outer end surface away from the nut 7 12;

Elastic ring 13, the elastic ring 13 is sheathed on the outer peripheral side of the fixed sleeve 8, and elastically compressed in the arc-shaped groove 12;

The positioning pin 14 is fixedly connected to the end surface of the fixed sleeve 8 facing the nut 7, and is used for plugging and mating with the bolt sleeve 3 of the standard section;

The first chamfer 5 enables the slotted bald head screw 4 to enter the bottom end of the central hole 9 of the fixed sleeve 8 by its own weight; Under the action of elastic force, the inner end of the locking slider 11 is inserted into the corresponding groove 6 , and the slotted bald screw 4 is locked in the fixing sleeve 8 .

The above self-locking bolt structure is used to connect adjacent standard sections in tower cranes. The self-locking bolt structure includes a slotted bald screw 4, a nut 7 threaded with the top of the slotted bald screw 4, and a nut 7 connected to the bottom of the slotted bald screw 4. The fixed sleeve 8 that is mated with the end, the locking slider 11 used to clamp the slotted bald screw 4 to the fixed sleeve 8, and the elastic ring 13 used to limit the locking slider 11 to the fixed sleeve 8 and the fixed sleeve 8 and the relative fixed positioning pin 14 of the bolt sleeve 3 of the standard section. When the above self-locking bolt structure is used to connect adjacent standard sections, the slotted bald screw 4 passes through the bolt sleeves 3 of two adjacent standard sections, one end of the slotted bald screw 4 is threaded with the nut 7, and the other end passes through the locking slide The block 11 is clamped and fixed with the fixed sleeve 8, so as to realize the fixed connection of the two standard sections.

The specific process of using the above self-locking bolt structure to connect adjacent standard sections is as follows: when the standard section is on the ground during the lifting and adding of the tower crane, the locking slider 11 is first installed in the concave hole of the fixed sleeve 8 through the elastic ring 13. In the platform hole 10, fix the fixing sleeve 8 on the bottom of the top bolt sleeve 3 of the lower standard section in the two adjacent standard sections, and then thread the nut 7 on the slotted bald screw rod 4, and then install the nut 7 The slotted bald screw 4 is placed in the bottom bolt sleeve 3 of the upper standard section in two adjacent standard sections, the standard section is hoisted, introduced and put in place, and finally the bottom end of the slotted bald screw 4 is inserted into the fixing sleeve 8 In the center hole 9 of the center hole 9, lock the sliding block 11 into the groove 6 to lock, realize the fixed connection between the bottom end of the slotted bald screw rod 4 and the fixed sleeve 8, and then tighten the nut 7 to realize the quick connection between the standard joints .

The above self-locking bolt structure uses slotted bald head screw 4, nut 7, fixing sleeve 8, locking slider 11, elastic ring 13 and positioning pin 14 to realize the quick connection of the standard joint, and pre-install each connecting part on the standard joint. Only one worker needs to pre-tighten the nut 7 with a torque wrench. Therefore, the self-locking bolt structure has the characteristics of simple structure, convenient installation and high reliability. Efficiency, and avoid problems such as missing installation during the construction process of workers.

In a specific embodiment, the cross-sectional shape of the locking slider 11 is rectangular, and a second chamfer 15 is provided on a vertical side towards the inner end of the groove 6; when the locking slider 11 will be grooved When the bald head screw 4 is locked on the fixed sleeve 8, the second chamfer 15 enables the slotted bald head screw 4 to only rotate to one side in the circumferential direction, and the locking slider 11 can slide out from the groove 6 to realize the slotted bald head through the rotation. The unlocking of screw rod 4 and fixed sleeve 8. As shown in Figure 4, the concave table hole 10 is a stepped hole with a small inside and a large outside; the locking slider 11 is a stepped structure that matches the shape of the concave table hole 10, and the cross-sectional shape is rectangular, and the locking slider 11 is inserted into the groove. The inner end of 6 is provided with second chamfer 15, and second chamfer 15 is only arranged on a vertical edge of locking slider 11, also can be arranged on the horizontal edge of top and bottom, but the other vertical edge No chamfering is provided, and it is used to limit the rotation direction of the slotted bald screw 4 through the limit formed by the vertical edge on the other side and the groove 6, so that the slotted bald screw 4 can only move along the direction from the second chamfer 15 Rotate to the direction of the vertical edge on the other side, but not in the direction from the vertical edge toward the second chamfer 15, as shown in the structure of Figure 4, the slotted bald screw 4 can only rotate in the counterclockwise direction, and cannot Turn clockwise; and when turning counterclockwise, the locking slider 11 can be withdrawn from the groove 6, so that the slotted bald screw 4 can be pulled out from the central hole 9 of the fixing sleeve 8 to realize unlocking.

In the above-mentioned self-locking bolt structure, the cross-sectional shape of the locking slider 11 is rectangular, and a second chamfer 15 is provided on a vertical edge towards the inner end of the groove 6; When the screw 4 is locked on the fixed sleeve 8, the second chamfer 15 enables the slotted bald screw 4 to only rotate to one side in the circumferential direction, and through the rotation, the locking slider 11 can slide out from the groove 6 to realize the slotted bald screw. 4 and the unlocking of the fixed sleeve 8; since a second chamfer 15 is provided at the end where the locking slider 11 is inserted into the groove 6 of the slotted bald screw 4, the slotted bald screw 4 can be restricted by the second chamfer 15 It can only rotate in one direction, which facilitates the angle adjustment of the slotted bald screw 4 during the connection process, and can make the locking slider 11 slide out from the groove 6 of the slotted bald screw 4 by unidirectional rotation to realize the slotted bald screw. 4 and the fixing sleeve 8; therefore, adopting the above-mentioned self-locking bolt structure is not only convenient for installation, but also can improve the efficiency of disassembly.

Further, as shown in FIG. 4 , the fixed sleeve 8 is a cylindrical structure, and the outer peripheral surface is provided with an annular groove 16 along the circumference; the concave platform hole 10 is located in the annular groove 16; the elastic ring 13 is sleeved in the annular groove 16 . The number and position of the recessed table holes 10 correspond to the grooves 6 one by one, 2, 3 or more can be set, and the recessed table holes 10 are evenly distributed along the circumferential direction of the fixed sleeve 8, in this embodiment, the set There are five concave table holes 10 as an example for illustration.

The fixed sleeve 8 of the above-mentioned self-locking bolt structure is a cylindrical structure, and an annular groove 16 along the circumferential direction is arranged on the outer peripheral surface of the fixed sleeve 8. The concave table hole 10 is located in the annular groove 16, and the elastic ring 13 is sleeved in the annular groove. 16, therefore, the position of the elastic ring 13 can be limited by the annular groove 16 on the outer peripheral surface of the fixed sleeve 8, and the elastic ring 13 is always kept in the annular groove 16, so that the locking slider 11 can be securely snapped into the slot In the groove 6 of the bald head screw 4, the reliability and stability of the connection between the standard joints are ensured, and safety accidents due to the separation of the elastic ring 13 are prevented.

On the basis of the above-mentioned various embodiments, the elastic ring 13 can be an annular spring; a plurality of positioning pins 14 distributed along the circumferential direction are arranged on the end surface of the nut 7, as shown in the structure of FIG. 4 , on the top of the fixed sleeve 8 There are four positioning pins 14 on the surface, and the top surface is the end surface of the fixed sleeve 8 facing the nut 7; during use, the bottom end surface of the bolt sleeve 3 at the top of the standard section is provided with positioning holes corresponding to the positioning pins 14 one by one , prevent the fixed sleeve 8 from rotating relative to the bolt sleeve 3 of the standard section through the plug-in cooperation of the positioning pin 14 and the positioning hole, thereby facilitating the fastening of the nut 7 and the slotted bald screw rod 4 . In this embodiment, the fixed sleeve 8 provided with four positioning pins 14 is taken as an example for illustration. In actual use, the number of positioning pins 14 can be 2, 3 or more, and the positioning pins 14 can be The circumference of the fixed sleeve 8 is evenly distributed, and can also be randomly distributed.

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (5)

1. The utility model provides a self-locking bolt structure convenient to connect tower crane standard festival which characterized in that includes:

the top end of the slotted optical head screw is provided with an external thread, the bottom end of the slotted optical head screw is provided with a first chamfer, and at least two grooves are uniformly distributed on the peripheral surface of the slotted optical head screw;

the nut is provided with an internal thread which is in threaded fit with the external thread;

the fixed sleeve is provided with a central hole which is in plug fit with the bottom end of the slotted optical head screw rod and concave platform holes which are in one-to-one correspondence with the grooves; the concave station hole is communicated with the central hole and the outer side of the fixed sleeve;

the locking sliding block is in inserted fit with the concave platform hole; the length of the locking slide block is equal to the sum of the depths of the concave platform hole and the concave groove; an arc-shaped groove is formed in the outer end face, away from the nut, of the locking sliding block;

the elastic ring is sleeved on the outer peripheral side of the fixed sleeve and elastically pressed in the arc-shaped groove;

the positioning pin is fixedly connected to the end face of one side, facing the nut, of the fixing sleeve and is used for being in inserting fit with the bolt sleeve of the standard section;

the first chamfer enables the slotted optical head screw to enter the bottom end of the central hole of the fixed sleeve through self weight; when the bottom end of the slotted optical head screw rod is inserted into the central hole of the fixed sleeve, the inner end part of the locking slide block is embedded into the corresponding groove under the elastic action of the elastic ring, and the slotted optical head screw rod is locked in the fixed sleeve.

2. The self-locking bolt structure according to claim 1, wherein the cross-sectional shape of the locking slider is rectangular and a second chamfer is provided at a vertical side toward an inner end portion of the groove;

when the locking slide block locks the slotted optical head screw rod on the fixed sleeve, the second chamfer angle enables the slotted optical head screw rod to rotate towards one side along the circumferential direction, and the locking slide block can slide out of the groove through rotation to realize unlocking of the slotted optical head screw rod and the fixed sleeve.

3. A self-locking bolt structure as defined in claim 1 wherein said retaining sleeve is cylindrical in configuration with a circumferential annular groove in its outer peripheral surface;

the concave station hole is positioned in the annular groove;

the elastic ring is sleeved in the annular groove.

4. The self-locking bolt structure of claim 1, wherein a tapered guide block is provided at the top end of the nut.

5. The self-locking bolt structure according to any one of claims 1 to 4, characterized in that the elastic ring is an annular spring;

and a plurality of positioning pins distributed along the circumferential direction are arranged on the end surface of the nut.

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