CN110847276A

CN110847276A - Connect limit structure and be used for excavating equipment's wear-resisting subassembly

Info

Publication number: CN110847276A
Application number: CN201911046723.4A
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: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-02-28

Abstract

The invention provides a connection limiting structure and a wear-resistant component for excavating equipment, belonging to the technical field of excavating machinery, wherein the connection limiting structure comprises: the hinge pin comprises a first end part and a second end part which are respectively provided with two ends, a positioning groove and a sliding groove are respectively and radially inwards arranged on the side wall of the hinge pin close to the first end part, and the sliding groove extends to the first end part; the limiting block is provided with a third through hole for the pin shaft to penetrate through, the inner side wall of the third through hole is provided with a positioning bulge extending towards the center part in the radial direction, and the limiting block can be sleeved on the pin shaft; the installation position and the fixed position can be switched by rotating the pin shaft relative to the limiting block, and the positioning bulge is limited in the sliding groove under the installation position; under the fixed position, the location arch is limited in the positioning groove. The limit block and the pin shaft are matched to realize synchronous action, so that the abrasion caused by asynchronous action is reduced, the service life of a wear-resistant part is prolonged, the replacement frequency is reduced, and the connection limit structure is convenient to assemble and disassemble.

Description

Connect limit structure and be used for excavating equipment's wear-resisting subassembly

Technical Field

The invention belongs to the technical field of excavating machinery, and relates to a connecting and limiting structure, in particular to a connecting and limiting structure and a wear-resistant part for excavating equipment.

Background

Excavating equipment is common equipment in engineering and mining industries, and an excavator bucket is an important part on the excavating equipment. Excavating equipment often collides with the rock material during the excavating operation, and it is therefore necessary to provide a wear assembly at the front edge of the bucket to better penetrate the excavated material and protect the bucket.

The wear assembly generally includes a wear root, a wear tip, and a connector fixedly connecting the wear root and the wear tip. If the wear-resistant component falls off, the bucket and the component are quickly worn, meanwhile, the lost wear-resistant component cannot be found, irreparable damage is caused to large-sized crushing equipment, and the safe connector becomes a use guarantee. Due to the environment of the wear-resistant component, the wear speed of the wear-resistant component is high, and the wear-resistant component is replaced for daily work. The efficiency of large excavating equipment is high, the economic output value of the excavating equipment is greatly influenced by the machine halt and the replacement of the wear-resistant component, and therefore the connector for quickly replacing the wear-resistant component becomes a market demand.

The prior art uses a plurality of lock pins in the market, such as a structure of a steel pin and a steel/rubber snap spring, wherein the steel pin and the steel/rubber snap spring are adopted, and the steel/rubber snap spring is disclosed in Chinese patent with application number 201210108708. X; if the chinese patent application No. 201210192594.1 discloses an excavation tooth subassembly again, including bucket tooth, toothholder and the coupling assembling of connecting bucket tooth and toothholder, coupling assembling includes tooth round pin and bayonet lock, and the pinhole that holds the tooth round pin is seted up to bucket tooth and toothholder, has seted up draw-in groove and guide way on the tooth round pin, and the bayonet lock setting is on the toothholder, and the axial displacement of bayonet lock and draw-in groove cooperation restriction tooth round pin still includes the jump ring of setting on the toothholder, and the bayonet lock setting is on the jump ring.

When the bucket teeth and the tooth holders are connected through the connecting pieces, the wear-resistant components of the excavating equipment are assembled through powerful striking of the hammer, and are disassembled through powerful striking during disassembly, and the machine is stopped for a long time during disassembly and assembly of one wear-resistant component, so that the production efficiency is reduced; moreover, because of the need of strong striking, the operator has great potential safety hazard; meanwhile, the clamp spring is stressed too much during installation and removal, so that the reusability of the clamp spring is poor, and the abrasion-resistant component is frequently dropped, so that the further improvement is needed.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a connection limiting structure which is long in service life, less in abrasion and convenient to disassemble.

The purpose of the invention can be realized by the following technical scheme: a connection limiting structure comprising: the hinge pin comprises a first end part and a second end part which are respectively provided with two ends, a positioning groove and a sliding groove are respectively and radially inwards arranged on the side wall of the hinge pin close to the first end part, and the sliding groove extends to the first end part;

the limiting block is provided with a third through hole for the pin shaft to penetrate through, the inner side wall of the third through hole is provided with a positioning bulge extending towards the center part in the radial direction, and the limiting block can be sleeved on the pin shaft;

the installation position and the fixed position can be switched by rotating the pin shaft relative to the limiting block, and the positioning bulge is limited in the sliding groove under the installation position; under the fixed position, the location arch is limited in the positioning groove.

As a further improvement of the invention, the limiting block comprises a limiting block body and a positioning block, a first notch for accommodating the positioning block is arranged on the side wall of the third through hole of the limiting block body, and the positioning protrusion is arranged on the inner side wall of the positioning block.

As a further improvement of the invention, the positioning protrusion is made of metal material, the positioning block is made of elastic material, and the conversion of the connector between the mounting position and the fixing position is realized through the elastic deformation of the positioning block in the radial direction of the pin shaft.

As a further improvement of the invention, a blocking bulge extending along the axial direction of the pin shaft is arranged between the positioning groove and the sliding groove.

As a further development of the invention, the first end and/or the second end of the pin shaft is/are provided with a radially outwardly extending end projection or a radially inwardly extending end recess.

As a further development of the invention, the first end and the second end are provided with a clamping portion for mounting or dismounting, which clamping portion is convex or concave in the axial direction.

The present invention also provides a wear assembly for excavating equipment comprising:

the wear-resisting tooth root comprises a mounting part, and a through pin hole is formed in the mounting part;

the wear-resistant tooth point comprises a first mounting cavity part which is connected with the mounting part in a nested manner, and two opposite side walls of the first mounting cavity part are provided with mounting through holes;

the connecting and limiting structure penetrates through the mounting through hole and the pin hole and connects the wear-resistant tooth root and the wear-resistant tooth tip together;

and a second mounting cavity part for accommodating the positioning block is dug in the inner side wall of the first mounting cavity part provided with the mounting through hole.

As a further improvement of the invention, the second end part of the pin shaft is provided with an end part bulge extending outwards along the radial direction, the edge of the mounting through hole of the outer side wall of the first mounting cavity part is provided with a second groove extending outwards along the radial direction and used for accommodating the end part bulge, or the second end part of the pin shaft is provided with a second groove extending inwards along the radial direction, and the edge of the mounting through hole of the outer side wall of the first mounting cavity part is provided with an end part bulge extending inwards along the radial direction and accommodated in the second groove.

As a further improvement of the invention, the second groove is in a fan shape, the two fan-shaped ends of the second groove are respectively provided with a mounting position and a fixing position, and the conversion of the mounting position and the fixing position is realized through the conversion that the end part bulge abuts against the two fan-shaped ends of the second notch.

As a further improvement of the invention, the end part of the pin hole is provided with a first groove; the locating piece includes first locating piece body and second locating piece body, and first locating piece body holds in second installation cavity portion, and the second locating piece body holds in first recess.

As a further improvement of the invention, the second mounting chamber part extends to the opening at the end of the first mounting chamber part.

As a further improvement of the invention, a second mounting cavity part for accommodating the positioning block is dug in one inner side wall of the first mounting cavity part, wherein the mounting through hole is formed in the inner side wall, a second groove which extends outwards in the radial direction and is used for accommodating the end part protrusion is formed in the edge of the mounting through hole in the other outer side wall, and the second groove is communicated with the mounting through hole.

wherein, the end part of the pin hole is dug with a second mounting cavity part for accommodating the positioning block.

Compared with the prior art, the connecting and limiting structure and the wear-resistant part for the excavating equipment provided by the invention have the advantages that the wear-resistant tooth root and the wear-resistant tooth tip are connected and fixed through the connecting and limiting structure. The cooperation of stopper and round pin axle makes stopper and round pin axle synchronization action, has reduced the wearing and tearing that lead to because of the action is asynchronous between stopper and the round pin axle, has improved wear-resisting part's life, has reduced the change frequency to it is convenient to connect limit structure loading and unloading, and part is small in quantity.

Drawings

Fig. 1 is a schematic structural diagram of a connection limiting structure according to a first embodiment.

Fig. 2 is a schematic structural view of the pin.

Fig. 3 is a schematic structural diagram of a limiting block.

Fig. 4 is a schematic structural view of the positioning projection.

Fig. 5 is an exploded view of a wear assembly for excavating equipment according to the second embodiment.

FIG. 6 is a schematic view of a wear resistant tooth root construction.

Fig. 7 is a schematic view of the structure of the wear resistant tooth tip.

Fig. 8 is a cross-sectional view of a wear resistant tooth tip.

Fig. 9 is a schematic view of the assembly of the wear-resistant tooth root and the connection limiting structure.

Fig. 10 is a partial sectional view of the assembly of the wear-resistant tooth root, wear-resistant tooth tip and connection limiting structure.

FIG. 11 is a schematic structural view of a wear-resistant tooth root in the third embodiment.

Fig. 12 is a cross-sectional view of the wear resistant tooth tip of the fourth embodiment.

Fig. 13 is a schematic structural view of the assembly of the four wear-resistant tooth tips and the connection limiting structure of the embodiment.

Fig. 14 is a schematic structural diagram of a stopper.

In the figure, 10, wear resistant tooth roots; 101. a first groove; 102. a pin hole; 103. an installation part; 20. wear-resistant tooth tips; 201. a first mounting chamber section; 202. a second through hole; 203. a first through hole; 205. a second mounting chamber section; 206. a second groove; 30. a pin shaft; 302. a chute; 303. a blocking projection; 304. a positioning groove; 305. the end part is raised; 306. a clamping portion; 307. a distal portion; 40. positioning blocks; 401. positioning the projection; 402. a leg portion; 403. a pore structure; 50. a limiting block; 501. a third through hole; 502. a first stopper body; 503. a second stopper body; 504. a first notch; 60. And (5) installing a tool.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to fig. 1 to 14, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1 to 4 and 14, the present invention provides a connection limiting structure applied to a wear assembly of excavating equipment, the connection limiting structure including: a pin shaft 30 and a limiting block 50.

As shown in fig. 2, the pin 30 includes a first end portion and a second end portion, which are separately provided with two ends, a positioning groove 304 and a sliding groove 302 are radially inwardly formed on a side wall of the pin 30 close to the first end portion, and the sliding groove 302 extends to the first end portion;

as shown in fig. 3 and 14, the limiting block 50 is provided with a third through hole 501 through which the pin shaft 30 can pass, the specific position is a center of the limiting block 50, a positioning protrusion 401 extending radially toward the center is provided on an inner side wall of the third through hole 501, and the limiting block 50 can be sleeved on the pin shaft 30;

the conversion between the installation position and the fixed position can be realized by the rotation of the pin shaft 30, and the positioning protrusion 401 is limited in the sliding groove 302 at the installation position; in the fixed position, the positioning projection 401 is defined in the positioning groove 304.

Further, a positioning groove 304 is juxtaposed with a distal end portion 307 of the chute 302 distal from the first end. The pin 30 may pass through the third through hole 501 in the core of the stopper 50 from the first end.

Specifically, the outer diameter of the pin shaft 30 is matched with the inner diameter of the third through hole 501, so that when the pin shaft 30 passes through the third through hole 501 in the center of the limiting block 50 from the first end, the pin shaft can be smoothly inserted only when the positioning protrusion 401 is aligned with the sliding groove 302, otherwise the pin shaft cannot be inserted. The positioning projection 401 slides until the chute distal end portion 307 is stopped, and stops sliding. When it is necessary to shift the connection limiting structure from the mounting position to the fixing position, the limiting block 50 is rotated so that the positioning projection 401 is shifted from the chute distal end portion 307 into the positioning groove 304. Under the fixed position, stopper 50 and round pin axle 30 synchronization action have showing and have reduced the wearing and tearing that lead to because of the action is asynchronous between stopper 50 and the round pin axle 30. The replacement frequency of parts is reduced, and the service life of the limiting block 50 and the service life of the pin shaft 30 are prolonged. And the part quantity is few, connects limit structure and only includes round pin axle 30 and stopper 50, easily shaping and installation are simple. Compared with the prior art, need not to use the jump ring, also need not to hit the assembly with the hammer vigorously.

Further, the limiting block 50 includes a limiting block body and a positioning block 40, a first notch 504 for accommodating the positioning block 40 is disposed on a side wall of the third through hole 501 of the limiting block body, and the positioning protrusion 401 is disposed on an inner side wall of the positioning block 40. The first notch 504 may be configured to disconnect the stopper body or to maintain the stopper 50 connected to the outer sidewall. The positioning block 40 is disposed in the first notch 504 to form a continuous body.

Further, the positioning protrusion 401 is made of a metal material, the positioning block 40 is made of an elastic material, more specifically, the positioning block 40 is made of a rubber material, and the positioning protrusion 401 is wrapped in the positioning block 40 to be molded when the positioning block 40 is cast, so that only the positioning protrusion 401 with a proper size is exposed outside the positioning block 40. The positioning block 40 is made of an elastic material and can be elastically deformed. The positioning block 40 elastically deforms in the radial direction of the pin 30 to change the mounting position and the fixing position of the connector. The positioning block 40 is made of elastic material, so that the abrasion between the positioning protrusion 401 and the pin shaft 30 when the mounting position is converted from the fixed position is reduced, the matching degree of the positioning protrusion 401 in the positioning groove 304 can be further improved, the limiting block 50 is tightly matched with the pin shaft 30 at the fixed position, and the synchronous action is realized.

Furthermore, as shown in fig. 4, the portion of the positioning protrusion 401 wrapped inside the positioning block 40 is provided with a plurality of radially outwardly extending legs 402, so that the contact area between the legs 402 and the positioning block 40 is increased, and the connection strength is improved.

In addition, in order to increase the amount of deformation of the positioning block 40, a plurality of hole structures 403 are dug in the positioning block 40. The conversion between the installation position and the fixed position is smoother.

Furthermore, a blocking protrusion 303 extending axially along the pin 30 is disposed between the positioning groove 304 and the sliding groove 302, so that the mounting position is separated from the fixing position, and the mounting position is prevented from being converted from the fixing position without control. Avoid producing in the use and shaking by a wide margin and leading to fixed position cunning to the mounted position to make round pin axle 30 landing.

Further, the second end of the pin shaft 30 is provided with an end protrusion 305 extending radially outwards, and the end protrusion 305 and a groove matched with an adjacent structure achieve a fixing effect, so that the position of the pin shaft 30 is ensured. Alternatively, the second end of the pin 30 may be provided with a second groove extending radially inward, and the second groove may be matched with a protrusion of an adjacent structure to achieve a fixing effect, so as to ensure the position of the pin 30.

For the convenience of disassembly, the first end portion and the second end portion are provided with clamping portions 306 for assembly or disassembly, and the clamping portions 306 are protruded or recessed in the axial direction. Specifically, the clamping portion 306 is a square concave portion, and the installation and the disassembly of the connection limiting structure can be realized by inserting the square convex installation tool 60 into the clamping portion 306 and screwing the clamping portion 306 clockwise or anticlockwise.

Example two

As shown in fig. 5 to 10, the present invention provides a wear assembly for excavating equipment comprising: a wear resistant tooth root 10, a wear resistant tooth tip 20 and a connection limiting structure as described in the first embodiment. The wear-resistant tooth root 10 is fixed to the lip of the bucket of the excavating equipment by welding, bolts, saddle pins, or the like. The wear tip 20 is then used directly for excavating work.

As shown in fig. 6, the wear-resistant tooth root 10 includes a mounting portion 103, and a pin hole 102 is provided through the mounting portion 103;

as shown in fig. 7 and 8, the wear-resistant tooth point 20 comprises a first mounting cavity part 201 nested with the mounting part 103, and two opposite side walls of the first mounting cavity part 201 are provided with mounting through holes, namely a first through hole 203 and a second through hole 202;

the connection limiting structure according to the first embodiment penetrates through the first through hole 203, the second through hole 202 and the pin hole 102, and connects the wear-resistant tooth root 10 and the wear-resistant tooth tip 20 together.

A second mounting cavity part 205 for accommodating the limiting block 50 is dug on the inner side wall of the first mounting cavity part 201 provided with the first through hole 203. Another alternative is to dig a second mounting cavity 205 at the end of the pin hole 102 to accommodate the stop block 50

Because the wear-resistant tooth point 20 is a vulnerable part which is often abraded by impact with stones in the excavation work, the replacement frequency is very high, correspondingly, the pin shaft 30 has larger and larger gaps among the pin hole 102 of the wear-resistant tooth point 20 and the installation through hole of the wear-resistant tooth root 10 in frequent friction, the matching degree is reduced, and the pin shaft 30 in the prior art can be difficult to fix due to the overlarge gap, so that the excavation work is interrupted. In the invention, the limiting block 50 matched with the pin shaft 30 is creatively arranged, the matching degree of the limiting block 50 and the pin shaft 30 is high, and synchronous action with the pin shaft 30 can be realized, so that the abrasion of the limiting block 50 is small, and even if the gap between the pin shaft 30 and the pin hole 102 of the wear-resistant tooth tip 20 and the installation through hole of the wear-resistant tooth root 10 is larger and larger, the wear-resistant tooth root 10, the wear-resistant tooth tip 20 and the connection limiting structure are still connected together under the fixing action of the limiting block 50, so that the abrasion degree is reduced, the working time of the wear-resistant tooth tip 20 is prolonged, the replacement frequency is reduced, and the working efficiency.

Furthermore, the second mounting cavity portion 205 extends directly to the opening of the first mounting cavity portion 201, and the outer edge of the limiting block 50 is rectangular. When in installation, the long side of the limiting block 50 can be directly pushed into the second installation cavity part 205 and slide to the inner side of the second installation cavity part 205, so that the installation is more convenient, and the first through hole 203 and the third through hole 501 are coaxial.

In order to make the matching degree of the limiting block 50 in the second mounting cavity portion 205 higher, further, as shown in fig. 13, both side edges of the second mounting cavity portion 205 extend towards the center portion, and both side long edges of the limiting block 50 also extend towards the center portion, so that the cross sections of the second mounting cavity portion 205 and the limiting block 50 are trapezoidal or approximately trapezoidal, and thus the limiting block 50 can be locked in the second mounting cavity portion 205 without sliding out.

Further, the second end of the pin 30 is provided with a radially outwardly extending end projection 305, a radially outwardly extending second groove 206 is formed at the edge of the second through hole 202 of the outer side wall of the first mounting cavity part 201 for accommodating the end projection 305, and the second groove 206 is communicated with the second through hole 202. Alternatively, the second end of the pin 30 is provided with a second groove 206 extending radially inward, and the edge of the second through hole 202 of the outer side wall of the first mounting cavity 201 is formed with an end projection 305 extending radially inward and receivable in the second groove 206.

The second groove 206 is fan-shaped, the fan-shaped two ends of the second groove 206 are respectively provided with a mounting position and a fixing position, and the mounting position and the fixing position are switched by the switching that the end part bulge 305 abuts against the fan-shaped two ends of the second notch.

In this embodiment, the first mounting cavity 201 is provided with an inner side wall of the first through hole 203, i.e. an inner side of the side wall, and a second mounting cavity 205 for accommodating the positioning block 40 is dug up, and an outer side wall of the second through hole 202, i.e. an outer side of the side wall, and a second groove 206 extending radially outwards is formed at the edge of the second through hole 202 for accommodating the end protrusion 305, and the second groove 206 is communicated with the second through hole 202.

The mounting method is as follows, as shown in fig. 10:

1. installation preparation: inserting the limiting block 50 into the second mounting cavity part 205, inserting the mounting part 103 into the first mounting cavity part 201, and aligning the pin hole 102, the first through hole 203, the second through hole 202 and the third through hole 501 of the mounting part 103;

2. mounting positions: a first end of the pin shaft 30 penetrates through the pin hole 102, the first through hole 203, the second through hole 202 and the third through hole 501 of the mounting part 103 until the positioning protrusion 401 abuts against the chute distal end part 307 and the end protrusion 305 abuts against the second groove 206;

3. fixing the position: the installation tool 60 is inserted into the clamping portion 306 and screwed, so that the positioning projection 401 is transferred into the positioning groove 304, and the installation is completed.

The disassembly method is the reverse operation of the installation method.

The mounting and dismounting method is simple and easy. In the excavation operation, the time consumed by installation and disassembly is greatly reduced, and the working efficiency is improved.

EXAMPLE III

As shown in fig. 11, the present embodiment is different from the second embodiment in that: after the pin hole 102 is installed, a first groove 101 is formed at one end close to the first end part of the pin shaft 30; the stopper body includes first stopper body 502 and second stopper body 503, and first stopper body 502 holds in second installation cavity portion 205, and second stopper body 503 holds in first recess 101, has further improved wear-resisting tooth root 10, wear-resisting prong 20 and the matching degree who connects limit structure, has also improved the suitability of connecting limit structure and different wear-resisting prong 20 and wear-resisting tooth root 10.

Example four

As shown in fig. 12 and 13, the present embodiment is different from the second embodiment in that: the inner side walls of the two mounting through holes of the first mounting cavity part 201 are all provided with the second mounting cavity part 205 for accommodating the positioning block 40 in an excavating mode, the limiting block 50 can be mounted on the second mounting cavity part 205 on the more proper side according to needs in the mounting process, the flexibility of the mounting process and the universality of the connection limiting structure are improved, and the mounting difficulty is reduced.

Further, the edges of the first through hole 203 and the second through hole 202 of the outer side wall of the first mounting cavity part 201 are respectively provided with a second groove 206 which extends outwards in the radial direction and is used for accommodating the end part protrusion 305, so that the flexibility of the assembling process and the universality of the connection limiting structure are further improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The utility model provides a connect limit structure which characterized in that includes:

the hinge pin comprises a first end part and a second end part which are respectively provided with two ends, a positioning groove and a sliding groove are respectively and radially inwards arranged on the side wall of the hinge pin close to the first end part, and the sliding groove extends to the first end part;

2. The connecting and limiting structure according to claim 1, wherein the limiting block comprises a limiting block body and a positioning block, a first notch for accommodating the positioning block is formed on a side wall of the third through hole of the limiting block body, and the positioning protrusion is formed on an inner side wall of the positioning block.

3. The connection limiting structure according to claim 2, wherein the positioning protrusion is made of a metal material, the positioning block is made of an elastic material, and the connector is switched between the installation position and the fixing position by elastic deformation of the positioning block in the radial direction of the pin shaft.

4. The connection limiting structure according to claim 1, wherein a stopping protrusion extending in the axial direction of the pin shaft is provided between the positioning groove and the sliding groove.

5. The connection-limiting structure of claim 4 wherein the first end portion and the second end portion are provided with a clamping portion for mounting or dismounting, the clamping portion being axially convex or concave.

6. A wear assembly for excavating equipment comprising:

the connection limiting structure according to claim 2 or 3, which penetrates through the mounting through hole and the pin hole, and connects the wear-resistant tooth root and the wear-resistant tooth tip together;

7. A wear assembly for excavating equipment according to claim 6 wherein the second end of the pin is provided with a radially outwardly extending end projection and the edge of the mounting through hole in the outer side wall of the first mounting chamber portion is formed with a second radially outwardly extending groove for receiving the end projection or the second end of the pin is provided with a second radially inwardly extending groove and the edge of the mounting through hole in the outer side wall of the first mounting chamber portion is formed with a radially inwardly extending end projection receivable in the second groove.

8. A wear assembly for excavating equipment according to claim 7 wherein the second recess is sector shaped, the ends of the sector of the second recess being at the mounting and securing locations respectively, the conversion of the mounting and securing locations being effected by the conversion of the end projections against the ends of the sector of the second recess.

9. A wear assembly for excavating equipment according to claim 6 wherein the pin bore end defines a first recess; the locating piece includes first locating piece body and second locating piece body, and first locating piece body holds in second installation cavity portion, and the second locating piece body holds in first recess.

10. A wear assembly for excavating equipment comprising: