Self-locking connection device for the combined bucket teeth of mining equipment

Abstract

The present invention discloses a self-locking connection device for a combined bucket tooth of an excavation device, which includes a pin sleeve, a self-locking pin, an elastic member, a magnet, a bolt and a nut. The self-locking pin, the elastic member and the magnet are assembled and connected into an integral structure by the bolt and the nut and placed in the pin sleeve. This self-locking connection device is an internal hidden pin connection structure. Compared with the traditional external pin connection structure, it has simple locking, higher reliability, direct force transmission, the self-locking pin is only subject to shear force and has a longer service life. Moreover, this internal hidden pin connection structure is placed in the installation blind hole of the tooth base during use, which can reduce the rust and wear of the components of the self-locking connection device, thereby further improving the service life of the self-locking connection device. Furthermore, this self-locking connection device does not require additional nuts, washers, etc. to achieve fastening and anti-loosening, and can adsorb the self-locking connection device in the tooth base installation blind hole through the magnet without tight fitting or spot welding fixation. The elastic member ensures the reliable connection and locking between the tooth tip and the tooth base.

Description

Technical Field

[0001] The present invention belongs to the technical field of excavation equipment, and particularly relates to a self-locking connection device for a combined bucket tooth of an excavation equipment. Background Art

[0002] The bucket tooth is a typical wear-resistant component of excavation equipment. The bucket tooth wears severely during use, and the components need to be replaced frequently. To reduce the cost of the bucket tooth, it is usually designed as a combined structure. As Figure 1 shown, the combined bucket tooth of the existing excavation equipment in the prior art includes: a tooth tip 100, a tooth socket 200, and a connection bolt 300. The inner cavity 110 of the tooth tip 100 cooperates with the head 210 of the tooth socket 200. A pin hole 220 for cooperating with the connection bolt 300 is provided on the head 210 of the tooth socket 200. Side wall through holes 120 for cooperating with the connection bolt 300 are respectively provided on both side walls of the inner cavity 110 of the tooth tip 100. When assembling the combined bucket tooth, the connection bolt 300 is inserted into the side wall through hole 120 of the tooth tip 100 and the pin hole 220 of the tooth socket 200 that match it, and then the connection bolt 300 is fastened with a nut and a washer, thereby combining the tooth tip 100 and the tooth socket 200 to form the combined bucket tooth of the excavation equipment. When the tooth tip 100 needs to be replaced due to wear, the tooth tip 100 can be disassembled from the tooth socket 200 and a new tooth tip can be replaced.

[0003] However, the connection bolt 300 is prone to loosening and is not firmly fixed, which may cause the tooth tip 100 to be lost during use. To prevent the connection bolt 300 from loosening, some in the prior art adopt a tight fit, and some adopt spot welding nuts. However, in this case, when disassembling the combined bucket tooth, the connection bolt 300 needs to be hammered and pried to remove the connection bolt, which is very troublesome to operate, brings many difficulties to manufacturing and assembly, and has relatively high process requirements. Summary of the Invention

[0004] To solve some or all of the technical problems existing in the above prior art, the present invention provides a self-locking connection device for a combined bucket tooth of an excavation equipment, which is used to connect the tooth tip and the tooth socket of the combined bucket tooth of the excavation equipment. The self-locking connection device includes a pin sleeve, a self-locking pin, an elastic member, a magnet, a bolt, and a nut. The self-locking pin, the elastic member, and the magnet are assembled and connected into an integral structure by the bolt and the nut and placed in the pin sleeve.

[0005] Further, in the self-locking connection device for the combined bucket tooth of the excavation equipment, the pin sleeve is a hollow cylindrical structure, and a convex ring portion extending inward is provided along the circumferential direction at one end.

[0006] Further, in the self-locking connection device for the combined bucket tooth of the excavation equipment, the self-locking pin, the elastic member, and the magnet are cylindrical structures and are provided with through holes in the center. The diameter of the through hole matches the diameter of the bolt.

[0007] Furthermore, in the self-locking connection device of the combined bucket teeth of the above-mentioned excavating equipment, the outer diameter of the elastic member is smaller than the inner diameter of the pin sleeve.

[0008] Furthermore, in the self-locking connection device of the combined bucket teeth of the above-mentioned excavating equipment, the outer diameter of the elastic member is 2-5 mm smaller than the inner diameter of the pin sleeve.

[0009] Furthermore, in the self-locking connection device of the combined bucket teeth of the above-mentioned excavating equipment, the self-locking pin is composed of a large-diameter main body part and a small-diameter pin head part. The outer diameter of the large-diameter main body part is smaller than the inner diameter of the pin sleeve and larger than the inner diameter of the convex ring part. The outer diameter of the small-diameter pin head part is smaller than the inner diameter of the convex ring part.

[0010] Furthermore, in the self-locking connection device of the combined bucket teeth of the above-mentioned excavating equipment, the outer diameter of the large-diameter main body part is 2-5 mm smaller than the inner diameter of the pin sleeve and 8-12 mm larger than the inner diameter of the convex ring part. The outer diameter of the small-diameter pin head part is 2-5 mm smaller than the inner diameter of the convex ring part.

[0011] Furthermore, in the self-locking connection device of the combined bucket teeth of the above-mentioned excavating equipment, the height of the elastic member is greater than or equal to the length of the small-diameter pin head part.

[0012] Furthermore, in the self-locking connection device of the combined bucket teeth of the above-mentioned excavating equipment, the pin head end of the small-diameter pin head part is circular or wedge-shaped.

[0013] Furthermore, in the self-locking connection device of the combined bucket teeth of the above-mentioned excavating equipment, the elastic member is elastic rubber or a coil spring wound around the outer circumference of the bolt.

[0014] Compared with the prior art, the self-locking connection device of the combined bucket teeth of the present invention has the following advantages and beneficial effects: The self-locking connection device is an internal hidden pin connection structure, which is the first case in excavating equipment. Compared with the traditional external pin connection structure, the locking is simple, more reliable, the force transmission is direct, the pin is only subjected to shear force, and the service life will be longer. Moreover, this internal hidden pin connection structure is placed in the installation blind hole of the tooth seat during use, so it can reduce the rust and wear of each component of the self-locking connection device, especially the self-locking pin, thereby further increasing the service life of the self-locking pin and thus the self-locking connection device; for connecting the tooth tip and the tooth seat, no additional nuts, washers, etc. are required to achieve fastening and anti-loosening; the self-locking connection device can be adsorbed in the tooth seat installation blind hole by a magnet without tight fitting or spot welding; the elastic member ensures the reliable connection and locking between the tooth tip and the tooth seat, and the clamping operation is simple; when the tooth tip is disassembled from the tooth seat, only by rotating the tooth tip can the unlocking and disassembly be realized, the operation is simple and convenient, time-saving and labor-saving, and no hammering, prying, etc. are required; the overall structure of the self-locking connection device is simple, the assembly is convenient, the production process requirements are not high, and the product manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. In the drawings:

[0016] Figure 1 FIG. is a schematic structural diagram of a combined bucket tooth of an excavation device in the prior art.

[0017] Figure 2 FIG. is a schematic structural diagram of a self-locking connection device of a combined bucket tooth of an excavation device according to the present invention.

[0018] Figure 3 FIG. is a three-dimensional schematic diagram of a combined bucket tooth of an excavation device using the self-locking connection device of the present invention.

[0019] Figure 4 For Figure 3 is a cross-sectional schematic diagram, particularly showing the installation state of the self-locking connection device of the present invention in the tooth socket.

[0020] Description of the reference numerals:

[0021] 100 - tooth tip, 110 - inner cavity, 120 - side wall through hole, 200 - tooth socket, 210 - head, 220 - pin hole, 300 - connecting bolt;

[0022] 10 - tooth tip, 11 - inner cavity, 20 - tooth socket, 21 - head, 22 - mounting blind hole;

[0023] 30 - self-locking connection device, 31 - pin sleeve, 311 - convex ring portion, 32 - self-locking pin, 321 - large diameter main body portion, 322 - small diameter pin head, 33 - elastic member, 34 - magnet, 35 - bolt, 36 - nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention in combination with the specific embodiments and corresponding drawings of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] Such as Figure 2 , Figure 3 and Figure 4As shown in the figure, the self-locking connection device 30 of the combined bucket teeth of the excavation equipment of the present invention is used to connect the tooth tip 10 and the tooth socket 20 of the combined bucket teeth of the excavation equipment. The self-locking connection device 30 includes a pin sleeve 31, a self-locking pin 32, an elastic member 33, a magnet 34, a bolt 35 and a nut 36. Among them, the self-locking pin 32, the elastic member 33 and the magnet 34 are assembled and connected into an integral structure by the bolt 35 and the nut 36 and placed in the pin sleeve 31.

[0026] The pin sleeve 31 is a hollow cylindrical structure, and a convex ring portion 311 extending inward is provided at one end thereof along the circumferential direction. The self-locking pin 32, the elastic member 33 and the magnet 34 are all cylindrical structures and have through holes opened in the center. The diameter of the through hole matches the diameter of the bolt 35. Thus, the bolt 35 can pass through the through holes of the self-locking pin 32, the elastic member 33 and the magnet 34 and assemble and connect the self-locking pin 32, the elastic member 33 and the magnet 34 into an integral structure by the nut 36.

[0027] The outer diameter of the elastic member 33 is smaller than the inner diameter of the pin sleeve 31 to facilitate the elastic scaling of the elastic member 33 within the pin sleeve 31. For example, the outer diameter of the elastic member 33 is 2-5 mm smaller than the inner diameter of the pin sleeve 31.

[0028] The self-locking pin 32 is composed of a large-diameter main body portion 321 and a small-diameter pin head portion 322. The outer diameter of the large-diameter main body portion 321 of the self-locking pin 32 is smaller than the inner diameter of the pin sleeve 31 and larger than the inner diameter of the convex ring portion 311, so as to facilitate the retraction and extension of the self-locking pin 32 relative to the pin sleeve 31, and to facilitate the large-diameter main body portion 321 of the self-locking pin 32 to abut against the convex ring portion 311 without disengaging from the pin sleeve 31. For example, the outer diameter of the large-diameter main body portion 321 is 2-5 mm smaller than the inner diameter of the pin sleeve 31 and 8-12 mm larger than the inner diameter of the convex ring portion 311. The outer diameter of the small-diameter pin head portion 322 of the self-locking pin 32 is smaller than the inner diameter of the convex ring portion 311, so as to facilitate the small-diameter pin head portion 322 to enter and exit the pin sleeve 31. For example, the outer diameter of the small-diameter pin head portion 322 is 2-5 mm smaller than the inner diameter of the convex ring portion 311.

[0029] Furthermore, in order to ensure that the small-diameter pin head portion 322 of the self-locking pin 32 can be fully retracted into the pin sleeve 31 when being pressed, the height H of the elastic member 33 is set to be greater than or equal to the length L of the small-diameter pin head portion 322.

[0030] As a specific implementation manner, according to the actual force conditions of the tooth tip 10 and the tooth socket 20 of the combined bucket teeth of the excavation equipment to be connected, the pin head end of the small-diameter pin head portion 322 of the self-locking pin 32 can be circular, wedge-shaped, etc.

[0031] As a specific implementation manner, the elastic member 33 can be elastic rubber or a coil spring wound around the outer periphery of the bolt 35.

[0032] In order to couple the tooth tip 10 and the tooth socket 20 to each other by using the self-locking connection device 30 of the combined bucket teeth of the excavation equipment of the present invention, a mounting blind hole 22 is pre-set on the side wall of the head 21 of the tooth socket 20, and the inner diameter and depth of the mounting blind hole 22 respectively match the outer diameter and height of the pin sleeve 31.

[0033] When using the self-locking connection device 30 of the present invention to couple the tooth tip 10 and the tooth socket 20 to each other to form the combined bucket teeth of the excavation equipment, first, the self-locking pin 32, the elastic member 33 and the magnet 34 are assembled and connected into an integral structure by bolts 35 and nuts 36 and placed inside the pin sleeve 31. Then, the pin sleeve 31 is placed into the mounting blind hole 22 on the side wall of the head 21 of the tooth socket 20. Subsequently, the inner cavity 11 of the tooth tip 10 is pushed towards the head 21 of the tooth socket 20. When the self-locking connection device 30 contacts the inner wall of the inner cavity 11 of the tooth tip 10, the small-diameter pin head 322 of the self-locking pin 32 is pressed, and thereby the elastic member 33 is compressed and retracted. As a result, the small-diameter pin head 322 retracts into the pin sleeve 31 accordingly until the top end of the head 21 of the tooth socket 20 abuts against the top end surface of the inner cavity 11 of the tooth tip 10, thereby enabling the inner cavity 11 of the tooth tip 10 to be fully sleeved and connected with the head 21 of the tooth socket 20, realizing the connection between the tooth tip 10 and the tooth socket 20. After the tooth tip 10 and the tooth socket 20 are connected, under the elastic action of the elastic member 33 of the self-locking connection device 30, the small-diameter pin head 322 of the self-locking pin 32 always abuts against the inner wall of the inner cavity 11 of the tooth tip 10, realizing the locking of the connection between the tooth tip 10 and the tooth socket 20.

[0034] As described above, the bolts 35 and nuts 36 assemble and connect the self-locking pin 32, the elastic member 33 and the magnet 34 into an integral structure and place them inside the pin sleeve 31, and the pin sleeve 31 is placed into the mounting blind hole 22 on the side wall of the head 21 of the tooth socket 20. Therefore, the self-locking connection device of the combined bucket teeth of the excavation equipment of the present invention is designed as an in-built hidden pin connection structure, which is completely different from the external pin / bolt connection structure in the prior art. The locking of this in-built hidden pin connection structure of the present invention is simpler and more reliable, the force transmission is direct, the self-locking pin 32 only bears the shear force, and the service life will be longer.

[0035] Since the tooth tip 10 is a vulnerable part during actual use, when the tooth tip 10 needs to be replaced and the tooth tip 10 is to be disassembled from the tooth socket 20, by rotating the tooth tip 10, the small-diameter pin head 322 of the self-locking pin 32 stuck in the inner cavity 11 of the tooth tip 10 can be pressed and retracted into the pin sleeve 31, so that the tooth tip 10 can be unlocked from the tooth socket 20 and then disassembled and replaced. The self-locking connection device can be loosened from the inner cavity 11 of the tooth tip 10, so that the tooth tip 10 can be removed from the tooth socket 20 for replacement.

[0036] In summary, the self-locking connection device of the combined bucket teeth of the excavation equipment of the present invention has the following advantages and beneficial effects:

[0037] 1. The self-locking connection device is an internal hidden pin connection structure, which is the first of its kind in excavation equipment. Compared with the traditional external pin connection structure, it has simpler and more reliable locking, direct force transmission, the pin is only subject to shear force, and its service life will be longer. Moreover, this internal hidden pin connection structure is placed in the installation blind hole of the tooth base during use, so it can reduce the rust and wear of the components of the self-locking connection device, especially the self-locking pin, thereby further improving the service life of the self-locking pin and thus the self-locking connection device;

[0038] 2. When using the self-locking connection device to connect the tooth tip and the tooth base, there is no need for additional nuts, washers, etc. to achieve fastening and anti-loosening;

[0039] 3. The setting of the magnet in the self-locking connection device can adsorb the self-locking connection device in the installation blind hole of the tooth base through the magnet without tight fitting or spot welding, preventing the self-locking connection device from falling off;

[0040] 4. The setting of the elastic member in the self-locking connection device ensures reliable connection and locking between the tooth tip and the tooth base, effectively avoiding the loss of the tooth tip, and the clamping operation is simple; at the same time, when the tooth tip is disassembled from the tooth base, only by rotating the tooth tip can the unlocking and disassembly be realized, the operation is simple and convenient, time-saving and labor-saving, without hammering, prying, etc.;

[0041] 5. The overall structure of the self-locking connection device is simple, the assembly is easy, the production process requirements are not high, and the product manufacturing cost is low.

[0042] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "rear", "left", "right", "upper" and "lower" in this article are all referenced with the placement state shown in the drawings.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-locking connection device for a combined bucket tooth of an excavation device, which is used to connect the tooth tip and the tooth base of the combined bucket tooth of the excavation device, and is characterized in that, The self-locking connection device includes a pin sleeve, a self-locking pin, an elastic member, a magnet, a bolt and a nut. The self-locking pin, the elastic member and the magnet are assembled and connected into an integral structure by the bolt and the nut and placed in the pin sleeve; The pin sleeve is a hollow cylindrical structure, and a convex ring portion extending inward is provided at one end along the circumferential direction; The self-locking pin, the elastic member and the magnet are cylindrical structures and are provided with through holes in the center, and the diameter of the through hole is matched with the diameter of the bolt; The self-locking pin is composed of a large-diameter main body portion and a small-diameter pin head portion. The outer diameter of the large-diameter main body portion is smaller than the inner diameter of the pin sleeve and larger than the inner diameter of the convex ring portion, and the outer diameter of the small-diameter pin head portion is smaller than the inner diameter of the convex ring portion; The elastic member is sleeved on the bolt and is located above the large-diameter main body portion of the self-locking pin, and the magnet is sleeved on the bolt and is located above the elastic member; The self-locking connection device is an internal hidden pin connection structure; An installation blind hole is pre-set on the side wall of the head of the tooth socket, and the inner diameter and depth of the installation blind hole are respectively matched with the outer diameter and height of the pin sleeve; When using the self-locking connection device to connect the tooth tip and the tooth socket to form a combined bucket tooth of an excavation device, first, the self-locking pin, the elastic member and the magnet are assembled and connected into an integral structure by the bolt and the nut and placed in the pin sleeve, and then the pin sleeve is placed into the installation blind hole on the side wall of the head of the tooth socket. Subsequently, the inner cavity of the tooth tip is pushed towards the head of the tooth socket. When the self-locking connection device contacts the inner wall of the inner cavity of the tooth tip, the small-diameter pin head portion of the self-locking pin is pressed, and thus the elastic member is pressed and retracted, and the small-diameter pin head portion retracts towards the inside of the pin sleeve until the top end of the head of the tooth socket abuts against the top end surface of the inner cavity of the tooth tip, thereby enabling the inner cavity of the tooth tip to be fully sleeved and connected with the head of the tooth socket, realizing the connection between the tooth tip and the tooth socket. After the tooth tip and the tooth socket are connected, under the elastic action of the elastic member of the self-locking connection device, the small-diameter pin head portion of the self-locking pin always abuts against the inner wall of the inner cavity of the tooth tip, realizing the connection lock between the tooth tip and the tooth socket; When it is necessary to replace the tooth tip and disassemble the tooth tip from the tooth socket, rotate the tooth tip to press the small-diameter pin head portion of the self-locking pin that is stuck in the inner cavity of the tooth tip and retract it into the pin sleeve, loosen the self-locking connection device from the inner cavity of the tooth tip, and thus disassemble the tooth tip from the tooth socket for replacement.

2. The self-locking connection device for the combined bucket teeth of the excavation equipment according to claim 1, characterized in that, The outer diameter of the elastic member is smaller than the inner diameter of the pin sleeve.

3. The self-locking connection device of the combined bucket teeth of the excavation equipment according to claim 2, characterized in that, The outer diameter of the elastic member is 2 - 5 mm smaller than the inner diameter of the pin sleeve.

4. The self-locking connection device for the combined bucket teeth of the excavation equipment according to claim 1, characterized in that, The outer diameter of the large-diameter main body portion is 2 - 5 mm smaller than the inner diameter of the pin sleeve and 8 - 12 mm larger than the inner diameter of the convex ring portion; the outer diameter of the small-diameter pin head portion is 2 - 5 mm smaller than the inner diameter of the convex ring portion.

5. The self-locking connection device of the combined bucket teeth of the excavation equipment according to claim 1, characterized in that, The height of the elastic member is greater than or equal to the length of the small-diameter pin head portion.

6. The self-locking connection device of the combined bucket teeth of the excavation equipment according to claim 1, characterized in that, The pin head end of the small-diameter pin head portion is circular or wedge-shaped.

7. The self-locking connection device of the combined bucket teeth of the excavation equipment according to any one of claims 1 to 6, characterized in that, The elastic member is an elastic rubber or a coil spring wound around the outer periphery of the bolt.

Images