CN108953352B

CN108953352B - Track locknut

Info

Publication number: CN108953352B
Application number: CN201811157294.3A
Authority: CN
Inventors: 孙团结; 孙振兴; 孙长春; 孙愉后
Original assignee: Fujian Jinjiang Lijing Automotive Fittings Co ltd
Current assignee: FUJIAN JINJIANG LIJING AUTOMOTIVE FITTINGS Co.,Ltd.
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2020-11-17
Anticipated expiration: 2038-09-30
Also published as: CN108953352A

Abstract

The invention discloses a track anti-loose nut which comprises a first nut, wherein an internal thread is arranged in the middle of the first nut, an external thread is arranged on a screw, the internal thread of the first nut is matched with the external thread of the screw, a first guide cavity is arranged inside the first nut, a first gravity ball is arranged in the first guide cavity, the first guide cavity is obliquely arranged, and the inclination direction of the first guide cavity from high to low is opposite to the screwing direction of the first nut. Compared with the prior art, the anti-loosening effect of the first nut is greatly improved, the anti-loosening capability is strong, and the first nut is effectively prevented from rotating in the loosening direction, so that the anti-loosening effect is realized essentially, and the normal service life of the track plate and the caterpillar track link is ensured.

Description

Track locknut

Technical Field

The invention relates to the field of nuts, in particular to a track locknut.

Background

The track connecting structure of the existing track type engineering machinery generally comprises a track shoe and a caterpillar track section, wherein the track shoe and the caterpillar track section are fixedly connected through bolts and nuts. In the process of walking of the crawler belt, the nut and the bolt are easy to loosen, so that the crawler plate and the caterpillar track link are not connected tightly, the crawler plate and the caterpillar track link are further damaged when the crawler plate and the caterpillar track link walk, and the nut is loosened mainly in the process that the nut rotates towards the unscrewing direction. The existing method for preventing the nut from loosening mainly comprises manual inspection and manual tightening. However, manual tightening inspection is prone to loss and untimely tightening, which ultimately results in damage to the track plate and track links.

In view of the above, the applicant has made an intensive study to solve the above problems and has made the present invention.

Disclosure of Invention

The invention mainly aims to provide a track locknut which has the characteristics of strong locking capability and good locking effect.

In order to achieve the above purpose, the solution of the invention is:

the utility model provides a track locknut, wherein, includes first nut, the middle part of first nut is equipped with the internal thread, is equipped with the external screw thread on the screw rod, and the internal thread of first nut and the external screw thread of screw rod cooperate, the inside of first nut is equipped with first guide chamber, first guide intracavity is equipped with first gravity ball, first guide chamber slope sets up, first guide chamber is by the opposite direction that the low slope direction of height and first nut screwed up.

Further, a second guide cavity is further formed in the first nut, the second guide cavity is arranged opposite to the first guide cavity, a second gravity ball is arranged in the second guide cavity, the weight of the second gravity ball is smaller than that of the first gravity ball, the second guide cavity is arranged in an inclined mode, and the inclined direction of the second guide cavity from high to low is opposite to the screwing direction of the first nut.

Further, the below of first nut still is equipped with the second nut and has the plastic stick of elasticity torsional properties, the plastic stick has a plurality of, and a plurality of plastic stick is the vertical distribution of circumference array between first nut and second nut, the upper end and the below of first nut of plastic stick are connected, the lower extreme and the top of second nut of plastic stick are connected.

Further, the internal thread of first nut is first single line internal thread, the internal thread aperture of second nut is greater than the diameter of screw rod external screw thread, and the screw rod external screw thread is the single line external screw thread, still be equipped with the pretension piece on the second nut, the internal thread on the second nut is the double-line internal thread, the pretension piece is the ring form pretension piece, be equipped with in the periphery of pretension piece with the second nut on the double-line internal thread assorted double-line external screw thread, be equipped with on the interior week of pretension piece with screw rod assorted second single line internal thread, the soon of double-line external screw thread is to opposite with the second single line internal thread revolves to.

Further, the diameter of the double-thread internal thread of the second nut is gradually reduced from top to bottom, and the diameter of the double-thread external thread on the peripheral surface of the preload piece is matched with the diameter of the double-thread internal thread on the second nut.

After the structure is adopted, the track locknut related to the invention firstly aligns the axis of the first nut with the axis of the screw rod and then rotates the first nut through the first guide cavity and the first gravity ball which are arranged in the first nut, so that the first nut is rotated to be tightly attached to an object to be locked, and the first nut is loosened. At this moment, because the extra gravity effect of first gravity ball for the weight distribution of first nut is uneven, be equipped with first gravity ball one side on the first nut heavier in the one side that does not set up first gravity ball, thereby make the axis of the skew screw rod of first nut, produce the dislocation between the axis of first nut and the axis of screw rod, therefore make the internal thread on the first nut act on the pressure increase of the external screw thread on the screw rod, and then make first nut be difficult for spin on the screw rod and lead to unscrewing, play locking effect. And through the first guide chamber that the slope set up and the setting that is located the first gravity ball of first guide intracavity for when first nut will be to the rotation of the orientation of unscrewing, first nut will produce relative motion with first gravity ball, and first gravity ball will be to the eminence removal in first guide chamber, and the potential energy increase of first gravity ball, and will reach the energy conservation, will reduce the angle that first nut unscrewed certainly, thereby gain further locking effect.

Compared with the prior art, the anti-loosening effect of the first nut is greatly improved, the anti-loosening capability is strong, and the first nut is effectively prevented from rotating in the loosening direction, so that the anti-loosening effect is realized essentially, and the normal service life of the track plate and the caterpillar track link is ensured.

Drawings

Fig. 1 is a schematic view of an assembly structure of a crawler according to the present invention.

Fig. 2 is a perspective view of the overall structure of the present invention.

Fig. 3 is a front view of the first nut of fig. 2 taken along line a-a in cooperation with a threaded rod.

Fig. 4 is a schematic view of the internal structure of the second guide chamber in the present invention.

Fig. 5 is a top view of the overall structure of the present invention.

Fig. 6 is an overall sectional view of section D-D in fig. 5.

Fig. 7 is an enlarged view of the portion B in fig. 6.

Fig. 8 is a perspective view of a second station of the plastic rod of the present invention.

Fig. 9 is a front view of the first nut of fig. 8 taken along section line C-C.

FIG. 10 is a front-to-back comparison of the misalignment of the screw axis and the first nut axis in the present invention.

Fig. 11 is an enlarged schematic view of portion E of fig. 10.

In the figure:

a first nut-1; a first guide chamber-11; a first gravity ball-111;

a second guide chamber-12; a first single internal thread-13;

a second gravity ball-121; a plastic rod-2;

a second nut-3; double-thread internal thread-31; a preload piece-4;

double-thread external thread-41; a second single internal thread-42; screw-6;

single thread external thread-61; a caterpillar link-7; a track shoe-8;

tightening direction-N; screw axis-L1; first nut axis-L2.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

As shown in fig. 1 to 11, the track locknut is mainly used for connecting a track shoe 8 and a track link 7, and includes a first nut 1, an internal thread is provided in the middle of the first nut 1, an external thread is provided on a screw 6, the internal thread of the first nut 1 is matched with the external thread of the screw 6, a first guiding cavity 11 is provided inside the first nut 1, a first gravity ball 111 is provided in the first guiding cavity 11, the first guiding cavity 11 is arranged in an inclined manner, and an inclined direction of the first guiding cavity 11 from high to low is opposite to a screwing direction of the first nut 1.

After adopting the above structure, it is through the first guide chamber 11 and the first gravity ball 111 that set up in first nut 1, through aligning first nut axis L2 with screw axis L1 earlier the first nut 1 of rotatory for at first nut 1 rotatory to with by the state that the tight close adhesion of locking object, loosen first nut 1. At this time, due to the additional gravity of the first gravity ball 111, the weight distribution of the first nut 1 is uneven, the side on which the first gravity ball 111 is disposed on the first nut 1 is heavier than the side on which the first gravity ball 111 is not disposed, so that the first nut axis L2 deviates from the screw axis L1, and a misalignment is generated between the first nut axis L2 and the screw axis L1, thereby increasing the pressure of the internal thread on the first nut 1 acting on the external thread on the screw 6, and further making the first nut 1 not easily rotate on the screw 6 to loosen, thereby playing a role in preventing looseness. Moreover, through the arrangement of the first guiding cavity 11 arranged obliquely and the first gravity ball 111 located in the first guiding cavity 11, when the first nut 1 is to rotate in the loosening direction, the first nut 1 will generate relative motion with the first gravity ball 111, the first gravity ball 111 will move to the high position of the first guiding cavity 11, the potential energy of the first gravity ball 111 increases, and according to the law of conservation of energy, the angle of rotation of the first nut 1 in the loosening direction will decrease or even will not rotate in the loosening direction and is directly offset by the first gravity ball 111, thereby obtaining a further anti-loosening effect.

Preferably, a second guide cavity 12 is further disposed inside the first nut 1, the second guide cavity 12 is disposed opposite to the first guide cavity 11, a second gravity ball 121 is disposed inside the second guide cavity 12, the weight of the second gravity ball 121 is smaller than that of the first gravity ball 111, the second guide cavity 12 is disposed in an inclined manner, and the inclined direction of the second guide cavity 12 from high to low is opposite to the screwing direction of the first nut 1. Because the weight of second gravity ball 121 is less than the weight of first gravity ball 111, therefore, the weight distribution of whole first nut 1 is uneven, one side that is equipped with first gravity ball 111 on first nut 1 is heavier, therefore, after screwing up first nut 1, first nut 1 receives the effect of gravity down, first nut axis L2 will take place to deviate, and make first single line internal thread 13 on first nut 1 and single line external thread 61 on the screw rod 6 produce the extrusion, the interact's effort of first nut 1 and screw rod 6 has been increased, and then increased the frictional force between first nut 1 and the screw rod 6, thereby make first nut 1 need bigger revolving force when unscrewing the direction rotation, play further locking effect.

Preferably, in order to obtain further locking effect, the below of first nut 1 still is equipped with second nut 3 and plastic stick 2 that has elasticity twisting performance, plastic stick 2 has a plurality of, and a plurality of plastic stick 2 is the vertical distribution of circumference array between first nut 1 and second nut 3, the upper end and the below of first nut 1 of plastic stick 2 are connected, the lower extreme and the top of second nut 3 of plastic stick 2 are connected. The second nut 3 generates the propping force and the rotating force to the plastic rod 2 by screwing the second nut 3, and at the moment, the plastic rod 2 is changed from the first station of the vertical state to be the second station of the twisted state. And plastic stick 2 will support apical force and revolving force transmission to first nut 1 on, thereby increase the pressure of first nut 1 to screw rod 6, and second nut 3 is when rotatory screwing up, because the removal on the process of screwing up also produces the displacement, the distance between second nut 3 and the first nut 1 is less than the length of plastic stick 2, first nut 1 and second nut 3 extrude plastic stick 2 simultaneously, and plastic stick 2 produces the reaction force to first nut 1 and second nut 3, plastic stick 2 after the torsion no longer rotates to vertical state after receiving the extrusion of first nut 1 and second nut 3, it mainly because first nut 1 and second nut 3 all are greater than the required torsional force of plastic stick 2 by turning back the state into vertical state with the frictional force of screw rod 6 respectively. When whole object received the vibration, first nut 1 with by can produce the clearance between the locking object and make to disappear in the twinkling of an eye by the effort of locking object to first nut 1, first nut 1 reduces the extrusion effort of plastic stick 2 and screw rod 6 to make plastic stick 2 take place to twist reverse, and drive first nut 1 and rotate to the direction of screwing up, play locking effect. The plastic rod 2 plays a role in pre-tightening in advance in the process.

Preferably, in order to avoid that the second nut 3 twists the plastic rod 2, the second nut 3 is unscrewed again due to the twisting of the plastic rod 2, so that the plastic rod 2 becomes a vertical state, and the plastic rod 2 loses the pre-tightening function. Therefore, the internal thread of first nut 1 is first single line internal thread 13, the internal thread aperture of second nut 3 is greater than the diameter of screw rod 6 external screw thread, and screw rod 6 external screw thread is single line external screw thread 61, still be equipped with pretension piece 4 on the second nut 3, the internal thread on the second nut 3 is double-thread internal thread 31, pretension piece 4 is ring form pretension piece 4, be equipped with on the periphery of pretension piece 4 with the double-thread external screw thread 41 of the double-thread internal thread 31 assorted on the second nut 3, be equipped with on the internal week of pretension piece 4 with screw rod 6 assorted second single line internal thread 42, the direction of turning of double-thread external thread 41 is opposite with the direction of turning of second single line internal thread 42.

After adopting above-mentioned structure, because the spiral direction of the double thread external screw thread 41 on the preload piece 4 and second single line internal thread 42 is opposite, and the external screw thread that cooperates with second nut 3 on the preload piece 4 is double thread external screw thread 41, and the internal thread that cooperates with screw 6 on the preload piece 4 is single line internal thread. Because the double-line external thread 41 and the single-line internal thread generate different displacements after rotating by the same angle, after the first nut 1 is tightly attached to the object to be fastened, the preload piece 4 is rotated to the position below the first nut 1 and slightly higher than the second nut 3, the second nut 3 is manually rotated to the tightening direction, so that the plastic rod 2 is twisted to the tightening direction, and then the preload piece 4 is loosened, so that the preload piece 4 rotates reversely and is simultaneously matched with the second nut 3 in the tightening direction. And because the internal thread of the second nut 3 and the external thread of the preload piece 4 are both double-thread threads, and the internal threads of the screw 6 and the preload piece 4 are both single-thread threads, after the preload piece 4 rotates for a circle in the loosening direction, the second nut 3 rotates in the tightening direction, and the displacement of the preload piece 4 moving in the loosening direction is smaller than the displacement of the second nut 3 in the tightening direction.

Thereby make at the in-process of vibration, preload piece 4 will take place to when unscrewing the rotation of direction, will make second nut 3 to the direction of screwing up rotate and extrude plastic rod 2 through the change in the displacement of second nut 3, plastic rod 2's counter force counteracts on second nut 3, and the opposite direction that second nut 3 and preload piece 4 removed and second nut 3 are greater than preload piece 4 displacement of unscrewing to the displacement that the plastic rod 2 direction removed, thereby make the mutual extruded power increase between second nut 3 and the preload piece 4, and second nut 3 receives plastic rod 2's counter force again, through the transmission of power, make the pressure increase that preload piece 4 received. The pressure of the preload member 4 on the screw 6 is increased to provide further anti-loosening function.

Preferably, the diameter of the double-thread internal thread 31 of the second nut 3 is gradually reduced from top to bottom, the diameter of the double-thread external thread 41 on the outer circumferential surface of the preload piece 4 is matched with the diameter of the double-thread internal thread 31 on the second nut 3, and the diameter of the second single-thread internal thread 42 is gradually reduced from top to bottom. Therefore, when the preload member 4 is vibrated to rotate in the loosening direction so that the second nut 3 rotates in the tightening direction, the preload member 4 displaces downward, the second nut 3 displaces upward, the moving distances of the preload member 4 and the second nut 3 are different due to the difference of the thread number, and the diameter of the double-thread internal thread 31 of the second nut 3 is gradually reduced from top to bottom, so that the pressure between the second nut 3 and the preload member 4 is increased when the preload member 4 moves downward and the second nut 3 moves upward. And because the diameter of the second single-thread internal thread 42 on the preload piece 4 is gradually reduced from top to bottom, the pressure between the preload piece 4 and the screw rod 6 is increased, and the torsion force generated by the twisted plastic rod 2 is ensured to be smaller than the friction force between the preload piece 4 and the screw rod 6. Thereby make after the vibration, first nut 1 with by when locking between the thing clearance, the plastic stick 2 after the torsion will drive first nut 1 and rotate to the direction of screwing up to keep first nut 1 to hug closely in by the locking thing constantly, reach locking effect.

The lower surface of first nut 1 still is equipped with the first recess of a plurality of circumference array (not shown), the upper surface of second nut 3 still is equipped with a plurality of second recess (not shown) that correspond the setting with the first recess of a plurality of, the both ends of plastic stick 2 are inserted respectively and are established in first recess and second recess. The plastic rod 2 is convenient to arrange, disassemble and replace.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.

Claims

1. A track locknut is characterized by comprising a first nut, wherein an internal thread is arranged in the middle of the first nut, an external thread is arranged on a screw, the internal thread of the first nut is matched with the external thread of the screw, a first guide cavity is arranged inside the first nut, a first gravity ball is arranged in the first guide cavity, the first guide cavity is obliquely arranged, and the inclination direction of the first guide cavity from high to low is opposite to the screwing direction of the first nut;

a plurality of plastic bars are vertically distributed between the first nut and the second nut in a circumferential array, the upper end of each plastic bar is connected with the lower part of the first nut, and the lower end of each plastic bar is connected with the upper part of the second nut;

the internal thread of first nut is first single line internal thread, the internal thread aperture of second nut is greater than the diameter of screw rod external screw thread, and the external screw thread of screw rod is single line external screw thread, still be equipped with the pretension piece on the second nut, the internal thread on the second nut is the double-line internal thread, the pretension piece is the ring form pretension piece, be equipped with in the periphery of pretension piece with the second nut on the double-line internal thread assorted double-line external screw thread, be equipped with on the interior week of pretension piece with screw rod assorted second single line internal thread, the double-line internal thread diameter of second nut diminishes from top to bottom gradually, the diameter of the double-line external screw thread on the outer peripheral face of pretension piece matches with the double-line internal thread.

2. A track locknut as claimed in claim 1, wherein a second guiding cavity is further provided in the first nut, the second guiding cavity is opposite to the first guiding cavity, a second gravity ball is provided in the second guiding cavity, the weight of the second gravity ball is less than that of the first gravity ball, the second guiding cavity is inclined, and the inclination direction of the second guiding cavity from high to low is opposite to the screwing direction of the first nut.

3. The track anti-loose nut as claimed in claim 1, wherein the internal thread of the first nut is a first single-thread internal thread, the internal thread of the second nut is larger than the diameter of the external thread of the screw, the external thread of the screw is a single-thread external thread, the second nut is further provided with a preload piece, the internal thread of the second nut is a double-thread internal thread, the preload piece is a circular preload piece, the outer periphery of the preload piece is provided with a double-thread external thread matched with the double-thread internal thread of the second nut, the inner periphery of the preload piece is provided with a second single-thread internal thread matched with the screw, and the rotation direction of the double-thread external thread is opposite to that of the second single-thread internal thread.