CN217267764U

CN217267764U - Convenient lockpin subassembly of plug and excavation tooth connected system

Info

Publication number: CN217267764U
Application number: CN202220826521.2U
Authority: CN
Inventors: 任美康; 李辉
Original assignee: Ningbo Hopesun New Material Co Ltd
Current assignee: Ningbo Hopesun New Material Co Ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-08-23
Anticipated expiration: 2032-04-11

Abstract

The utility model discloses a lockpin component which is convenient to plug and unplug, an excavating tooth connecting system, a locking seat and a lockpin; the lock pin comprises a conical section and a locking head, and the locking head is positioned at one end with the large diameter of the conical section; the outer peripheral wall of the locking head is provided with a sliding groove which axially extends to the inner end face of the locking head; a locking groove is arranged on one circumferential side of the sliding groove; the locking seat is provided with a pin hole which axially penetrates through and is matched with the locking pin; the inner wall of the pin hole is provided with a locking convex part which is convex in the radial direction; the conical section is provided with a conical surface; in the process of inserting the lock pin, the conical surface plays a role in guiding, so that the inserting process is smoother; in the lockpin removal process, a gap is gradually formed between the conical surface of the conical section and the inner wall of the connecting through hole or the pin hole, so that the lockpin is removed more easily, and the problem that the lockpin is difficult to insert and remove due to soil, slurry and the like is solved.

Description

Convenient lockpin subassembly of plug and excavation tooth connected system

Technical Field

The utility model relates to a tooth subassembly of excavating equipment especially relates to a convenient lockpin subassembly of plug that the plug is convenient and utilize the lockpin to fix the system of toothholder with tooth part.

Background

Excavating equipment is common equipment in engineering and mining industries, and an excavating bucket is an important part on the excavating equipment. When the excavating machine is used for excavating, the excavating machine often collides with stones and soil, so that wear-resistant bucket teeth are required to be arranged at the front edge of the bucket.

Specifically, the tooth holder is fixedly connected to the bucket, and then the bucket teeth are fixed to the tooth holder through the lock pins. The tooth holder is fixed on the bucket by a screw or welding mode.

Application publication No. CN 110847276A's connection limit structure and wear-resisting subassembly disclose the structure that tooth fill and toothholder pass through the lockpin and connect.

In the use process of the wear-resistant component, soil enters the connecting part of the tooth holder and the bucket tooth and then enters the pin hole where the lock pin is located. When the bucket teeth are replaced, the insertion and the extraction of the lock pin are difficult due to mud, slurry and the like.

SUMMERY OF THE UTILITY MODEL

Based on earth, mud lead to the problem of lockpin plug difficulty, the utility model aims to solve the technical problem that a convenient lockpin subassembly of plug that the plug is convenient is provided, designs into certain tapering, the plug of the lockpin of being convenient for with the lockpin body.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the locking pin assembly convenient to insert and pull is characterized by comprising a locking seat and a locking pin;

the lock pin comprises a conical section and a locking head, and the locking head is positioned at one end with the large diameter of the conical section;

the outer peripheral wall of the locking head is provided with a sliding groove which axially extends to the inner end face of the locking head;

a locking groove is formed in one circumferential side of the sliding groove;

the locking seat is provided with a pin hole which penetrates through the locking seat in the axial direction and is matched with the locking pin;

the inner wall of the pin hole is provided with a locking convex part which is convex in the radial direction;

in an assembled state, the locking protrusion moves along the slide groove;

in a locked state, the locking protrusion is displaced into the locking groove, and the locking seat and the lock pin are fixed in position.

The utility model provides a further preferred technical scheme who above-mentioned technical problem adopted is: the locking head is a cylindrical member.

The utility model provides a further preferred technical scheme who above-mentioned technical problem adopted is: the locking seat comprises an outer base part and an inner plug protruding outwards, and the locking convex part is arranged at the base part.

The utility model provides a further preferred technical scheme who above-mentioned technical problem adopted is: the outer end face of the locking head is provided with a polygonal groove for applying a rotating force.

The utility model provides a further preferred technical scheme that above-mentioned technical problem adopted is: the base is provided with a sunken groove extending to the inner wall of the pin hole, a locking block is detachably assembled in the sunken groove, and the locking convex part is arranged at the inner end of the locking block.

The utility model provides a further preferred technical scheme who above-mentioned technical problem adopted is: the locking piece is an elastic component which is integrally formed.

The utility model provides a further preferred technical scheme who above-mentioned technical problem adopted is: and a positioning clamping protrusion is arranged on the peripheral wall of one side of the locking head, which is close to the outer end face.

The utility model provides an another technical scheme that above-mentioned technical problem adopted does: the excavating tooth connecting system comprises a tooth holder, a bucket tooth and the locking pin assembly convenient to insert and pull out;

the tooth holder is provided with a connecting through hole penetrating through two side surfaces, the locking seat is connected to one side of the tooth holder in a non-rotatable manner, and the connecting through hole is coaxial with the pin hole;

the bucket tooth is provided with a cavity with a backward opening, two side walls of the bucket tooth are provided with a pair of lock pin through holes communicated with the cavity, the tooth holder is inserted into the cavity, and the lock pin through holes and the connecting through holes are coaxial;

the lock pin penetrates through the lock pin through holes on the two sides and rotates for a certain angle at an angle of alignment of the locking convex part and the sliding groove, the locking convex part is shifted into the locking groove from the sliding groove, and the lock pin assembly convenient to insert and pull is switched to a locking state from an assembling state.

The utility model provides a further preferred technical scheme who above-mentioned technical problem adopted is: the plug of the locking seat is plugged into the connecting through hole, and the base of the locking seat is exposed out of the outer side of the tooth seat.

The utility model provides a further preferred technical scheme that above-mentioned technical problem adopted is: the inner cavity wall of the bucket tooth is provided with a containing groove for containing the base.

Compared with the prior art, the utility model has the advantages that the lock pin is arranged into a conical section and a locking head, the locking head is positioned at one end with large diameter of the conical section, and the conical section is provided with a conical surface; in the process of inserting the lock pin, the small-diameter end is arranged on the front side in the moving direction, the large-diameter end is arranged on the rear side in the moving direction, and the conical surface plays a role in guiding, so that the inserting process is smoother; in the lockpin pulling-out process, because the conical surface cooperation, a clearance is gradually formed between the conical surface of the conical section and the inner wall of the connecting through hole or the pin hole, so that the lockpin is pulled out more easily, and the problem that the plugging and pulling of the lockpin becomes difficult due to soil, slurry and the like is avoided.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the present invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is an exploded view of an excavating tooth attachment system in accordance with a preferred embodiment of the present invention;

fig. 2 is a perspective view of a tooth holder according to a preferred embodiment of the present invention;

FIG. 3 is a perspective view of a tooth according to a preferred embodiment of the present invention;

FIG. 4 is an exploded view of a latch assembly according to a preferred embodiment of the present invention;

FIG. 5 is an exploded view of a locking seat in accordance with a preferred embodiment of the present invention;

fig. 6 is a schematic view of the assembly of the locking seat and the tooth seat of a preferred embodiment of the present invention;

FIG. 7 is a schematic view of the digging tooth attachment system in an assembled condition in accordance with a preferred embodiment of the present invention;

FIG. 8 is a schematic illustration of the locking condition of the digging tooth attachment system in accordance with a preferred embodiment of the present invention;

FIG. 9 is a schematic view of the assembled state of the lock pin and the lock block according to a preferred embodiment of the present invention;

fig. 10 is a schematic view showing a locking state of the lock pin and the lock block according to a preferred embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the invention.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

Excavating equipment is common equipment in engineering and mining industries, and an excavator bucket is an important part on the excavating equipment. The front edge of the bucket is transversely provided with a plurality of digging teeth at intervals, and the digging teeth often collide with stones and soil during digging operation and are subjected to huge impact force and friction force, so that the digging teeth are easily damaged and the service life is short.

As shown in FIG. 1, the digging tooth attachment system includes a block 100, a tooth 200 and a lock pin assembly 300 securing the two.

Specifically, as shown in fig. 1 and 3, the tooth holder 100 is fixed to the front lower lip of the bucket, and is provided with a connecting through hole 1 penetrating through both side surfaces.

As shown in FIGS. 1 and 2, the bucket tooth 200 is provided with a cavity K which is opened backwards, and two side walls of the bucket tooth 200 are provided with a pair of lock pin through holes 6 communicated with the cavity K.

As shown in fig. 1 and 4, the locking pin assembly 300 includes a locking seat 10 and a locking pin 20. The locking pin 20 includes a conical section S1 and a locking head S2, the locking head S2 being located at the large diameter end of the conical section S1. Preferably, the locking head S2 is a cylindrical member, and the diameter of the locking head S2 is greater than the diameter of the end of the conical section S1.

The outer peripheral wall of the locking head S2 is provided with a slide groove 2 extending axially to the inner end face of the locking head S2, and one circumferential side of the slide groove 2 is provided with a locking groove 3. The locking seat 10 is provided with a pin hole 4 which axially penetrates through and is matched with the locking pin 20, and the inner wall of the pin hole 4 is provided with a locking convex part 5 which is radially convex.

During installation, the lock holder 10 is first non-rotatably coupled to one side of the block 100 such that the coupling through-hole 1 is coaxial with the pin hole 4.

Then, the bucket tooth 200 is moved, the mouth of the cavity K of the bucket tooth 200 faces backward, the tooth holder 100 is inserted into the cavity K from the rear side opening of the bucket tooth 200, the lock pin through hole 6 and the connecting through hole 1 are coaxial, and the opening of the pin hole 4 is completely visible from the opening of the lock pin through hole 6.

Further, the lock pin 20 is inserted into the lock pin through hole 6 on the side of the tooth 200 and is positioned properly to ensure that the lock pin 20 is at an angle at which the locking protrusion 5 and the slide groove 2 are aligned.

Thereafter, the lock pin 20 is inserted from the lock pin through hole 6 on one side of the tooth 200 to the lock pin through hole 6 on the other side through the pin hole 4 and the connecting through hole 1.

In the process of the step, the locking convex part 5 enters the sliding chute 2 from the slideway port of the sliding chute 2 at the insertion end of the lock pin 20 and slides in the sliding chute 2, so that the axial advance and retreat can be ensured by avoiding.

As shown in fig. 7 and 9, after the above steps are completed, the locking protrusion 5 moves to the side of the locking recess 3 along the slide groove 2 of the lock pin 20, and both ends of the lock pin 20 rest on the hole wall of the lock pin through hole 6. I.e., the lock pin 20 bridges the two side walls of the tooth 200. The latch assembly 300 is now in an assembled state.

Finally, as shown in fig. 8 and 10, a rotational force is applied to the lock pin 20, so that the lock pin 20 rotates at a certain angle relative to the lock seat 10, the locking protrusion 5 is displaced from the slide groove 2 into the locking recess 3, the lock seat 10 and the lock pin 20 are fixed in position, and the lock pin assembly 300 is switched from the assembled state to the locked state.

In summary, since the conical section S1 has a conical surface; in the process of inserting the lock pin 20, the small diameter end is arranged at the front side in the moving direction, the large diameter end is arranged at the rear side in the moving direction, and the conical surface plays a guiding role, so that the inserting process is smoother; in the process of pulling out the lock pin 20, because of the conical surface matching, a gap is gradually formed between the conical surface of the conical section S1 and the inner wall of the connecting through hole 1 or the pin hole 4, so that the lock pin 20 is more easily pulled out, and the problem that the plug-in and the pull-out of the lock pin 20 are difficult due to soil, slurry and the like is solved.

As shown in fig. 5 and 6, preferably, lock base 10 includes an outer base M1 and an inner outwardly projecting plug M2. The locking protrusion 5 is provided at the base M1. During the connection process of the locking seat 10 and the tooth holder 100, the plug M2 is plugged into the connecting through hole 1, the base M1 of the locking seat 10 is exposed outside the tooth holder 100, and the connecting through hole 1 and the pin hole 4 of the locking seat 10 jointly form a channel matched with the locking pin 20.

In order to facilitate the installation of the lock seat 10 and the tooth seat 100, the lock seat 10 and the tooth seat 100 are only in a plug-in connection relationship in the present embodiment, and therefore, in addition to considering the non-rotatability of the lock seat 10, it is necessary to consider the certainty of the assembly angle of the lock seat 10 each time. Therefore, in this embodiment, the cross section of the plug M2 is non-circular, and is eccentric and non-circular, and one of the outer sections of the connecting through hole 1 matches with the outer contour of the plug M2, so that the plug M2 can only be connected to the side of the tooth holder 100 at a certain angle.

As shown in fig. 4 and 5, the base M1 is provided with a recessed groove G extending to the inner wall of the pin hole 4, the lock piece 30 is detachably fitted in the recessed groove G, and the locking protrusion 5 is provided at the inner end of the lock piece 30. It will be appreciated that the locking nose 5 is also susceptible to wear due to the high impact and shock forces experienced during use of the digging tooth, and that the removable provision of the locking piece 30 facilitates maintenance of the lock base 10 while significantly reducing costs as compared to the overall replacement of the lock base 10.

Preferably, the locking piece 30 in this embodiment is an integrally formed elastic member, so that the locking protrusion 5 has elastic deformation capability.

Since the locking protrusion 5 is elastically deformed so that the locking protrusion 5 tightens the locking seat 10 and the locking pin 20 when it is displaced into the locking recess 3, which increases the friction therebetween and eliminates the radial gap. Not only can the lock pin 20 not move axially, but also the lock pin 20 is prevented from being stressed to slip during the operation of the digging tooth to cause the locking convex part 5 to be separated from the locking groove 3, thereby ensuring the stability of the bucket tooth 200 connected to the tooth holder 100 and further resisting the vibration and impact during the operation of the digging tooth.

As shown in fig. 1, 2 and 4, a positioning locking protrusion 7 is arranged on the outer peripheral wall of the locking head S2 near the outer end face, a notch 8 matched with the locking protrusion is arranged on the corresponding locking pin through hole 6, and the positioning locking protrusion 7 can move along the notch 8. Two side walls of the positioning clamping protrusion 7 form two action surfaces, and the notch 8 is provided with an initial position and a termination position. When the lock pin 20 is rotated, the locking convex part 5 enters the limit position of the locking groove 3, one acting surface of the positioning clamping convex part 7 is abutted against the positioning surface which is taken as the stop position of the corresponding notch 8, so that the lock pin 20 is limited to further rotate; conversely, when the lock pin 20 is rotated and the locking protrusion 5 exits the locking groove 3 and completely enters the sliding groove 2, the other acting surface of the positioning clip protrusion 7 abuts against the other positioning surface of the corresponding notch 8 as a starting position so as to limit the lock pin 20 from further rotation. And the start position and the positioning clamp projection 7 can be matched for initial positioning of the lock pin 20.

As shown in fig. 4, the outer end surface of the locking head S2 is provided with a polygonal groove 9 matched with a tool, and the polygonal groove 9 is inserted by a tool having a polygonal outer protrusion, so that the lock pin 20 is screwed clockwise or counterclockwise to switch the assembling state and the locking state of the lock pin assembly 300. Preferably, the polygonal groove is a square groove.

As shown in fig. 4, further, a blocking protrusion V extending in the axial direction of the lock pin 20 is provided between the locking groove 3 and the sliding chute 2, so that the locking groove 3 is clearly separated from the sliding chute 2, and the locking groove 3 is prevented from being transformed into the sliding chute 2 without control. Avoid the lock pin 20 from rotating and sliding off due to large vibration generated in the using process.

As shown in fig. 2, the inner cavity wall of the tooth 200 is provided with a receiving groove C for receiving the base M1, and the receiving groove C not only serves as an avoiding function to provide the assembling position of the base M1, but also more importantly, further limits the movement of the locking seat 10, prevents the locking seat 10 and the lock pin 20 from being displaced in the locking state, and further enhances the firmness of connection.

As shown in fig. 3, the tooth holder 100 includes a nose portion R1 and a mounting portion R2 extending axially from front to back, and usually the nose portion R1 and the mounting portion R2 are integrally formed to secure the strength of the tooth holder 100. The mounting portion R2 is connected with the bucket, and the connecting through holes 1 are arranged on two side walls of the nose portion R1.

As shown in fig. 1, 7 and 8, the tooth 200 includes a solid tip L1 at the front and a connecting body L2 at the rear with a cavity K opening axially rearward. The nose R1 is held by the lock pin assembly 300 extending into the cavity K from the opening, so that the tooth 200 and the tooth holder 100 are combined into a whole by the lock pin assembly 300.

It is right above the utility model provides a lockpin subassembly and excavation tooth connected system that carry out the plug convenience introduce, it is right to have used specific individual example herein the utility model discloses a principle and implementation mode have been explained, and the explanation of above embodiment is only used for helping understanding the utility model discloses and core thought. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The locking pin assembly convenient to insert and pull out is characterized by comprising a locking seat and a locking pin;

a locking groove is formed in one circumferential side of the sliding groove;

in an assembled state, the locking protrusion moves along the slide groove;

2. The easy-to-insert locking pin assembly of claim 1, wherein the locking head is a cylindrical member.

3. The easy entry locking pin assembly of claim 1, wherein said locking seat includes an outer base and an inner outwardly projecting plug, said locking projection being disposed at said base.

4. The easy-to-insert and remove locking pin assembly as recited in claim 1, wherein the outer end surface of said locking head is provided with a polygonal recess for applying a rotational force.

5. The easy-to-insert and remove lock pin assembly as claimed in claim 3, wherein said base portion is provided with a recessed groove extending to an inner wall of said pin hole, said recessed groove is detachably fitted with a lock block, and said locking protrusion is provided at an inner end of said lock block.

6. The easy entry locking pin assembly of claim 5, wherein said locking piece is an integrally formed resilient member.

7. The easy-to-insert/remove locking pin assembly as recited in claim 5, wherein a positioning protrusion is formed on a peripheral wall of the locking head adjacent to the outer end surface.

8. An excavating tooth attachment system comprising a tooth holder, a tooth and a plug-in facilitating lock pin assembly according to any of claims 1-7;

the lock pin penetrates through the lock pin through holes on the two sides and rotates for a certain angle at the alignment angle of the locking convex part and the sliding groove, the locking convex part is shifted into the locking groove from the sliding groove, and the lock pin assembly convenient to insert and pull is switched from an assembly state to a locking state.

9. The excavating tooth attachment system according to claim 8 wherein the plug of said locking socket is inserted into said connecting through-hole, and the base of said locking socket is exposed to the outside of said tooth socket.

10. The digging tooth attachment system according to claim 9 wherein the inner cavity wall of the tooth is provided with a receiving slot for receiving the base.