Anti-falling excavator bucket tooth connecting structure

Abstract

The utility model discloses an anti-drop excavator bucket tooth connecting structure, which relates to the technical field of excavator parts, and comprises a bucket tooth and a tooth holder, the tooth holder is provided with a tooth holder connecting hole, the bucket tooth is connected with the tooth holder through a pin shaft, a screwed plug and a circlip for hole, the pin shaft penetrates through the tooth holder connecting hole of the tooth holder, and the screwed plug is connected with the circlip for hole. The screwed plug and the circlip for the hole are arranged at one end of the pin shaft, so that the bucket tooth can be effectively prevented from falling off; the bucket tooth and the tooth holder are connected and fixed through the pin shaft, the screwed plug and the circlip for the hole, through the two safety measures of the screwed plug and the circlip for the hole, the pin shaft is prevented from jumping out, the screwed plug can be prevented from loosening, connection is stable and reliable, the bucket tooth can be effectively prevented from falling off, and the service life of the bucket tooth is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of excavator parts, in particular to an anti-falling excavator bucket tooth connection structure. Background Art

[0002] The entire excavation process is accomplished by the interaction of the boom, dipper arm, and bucket. The bucket teeth first come into contact with the material. The bucket teeth are connected to the tooth adapter via bayonet pins, and can be removed and replaced when worn.

[0003] The existing tooth holder and bucket tooth assembly structure usually uses a bayonet, a retaining spring and a gasket to fix the bucket tooth on the tooth holder. Figure 1 As shown, the tooth adapter features a stepped hole. The large hole accommodates a retaining spring and gasket, while the smaller hole accommodates a bayonet pin. The bayonet pin is designed with a groove that allows the retaining spring to fit interference-fit within the bayonet's groove. During normal assembly, the retaining spring and gasket are first installed in the large hole of the tooth adapter. The tooth is then mounted on the adapter, and the bayonet pin is slowly hammered into the connecting hole of the adapter. During assembly, the bayonet pin stretches the elastically deformable retaining spring until it fits into the bayonet's groove. This secures the bayonet pin in the hole and prevents the tooth from separating from the adapter. During disassembly, hammer the pin shaft to disengage the retaining spring, allowing the bayonet pin to be removed and the tooth and adapter separated.

[0004] The existing assembly structure is relatively cumbersome to disassemble and disassemble. Repeated disassembly and assembly can lead to irreversible deformation of the retaining spring, wear on the retaining spring and retaining pin, and reduced interference fit, which can cause the retaining pin and the bucket tooth to fall out. This lack of long-term stability is also a problem. Furthermore, when the tooth and tooth adapter have large misalignments, the tooth can wobble significantly, subjecting the retaining pin and retaining spring to varying degrees of unbalanced load. This can easily cause the retaining pin to separate from the retaining spring, leading to both the retaining pin and the bucket tooth falling out. Utility Model Content

[0005] In response to the shortcomings of the above-mentioned existing technologies, the utility model provides an anti-falling excavator bucket tooth connection structure, which can achieve a more stable and reliable connection between the excavator bucket teeth and the tooth seat, solve the defect of the traditional connection structure causing bucket teeth to fall off during excavator operation, extend the service life of the bucket teeth, and improve the safety of excavator operations.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An anti-falling excavator bucket tooth connection structure includes a bucket tooth and a tooth seat, a tooth seat connecting hole is opened on the tooth seat, the bucket tooth and the tooth seat are connected by a pin shaft, a screw plug and a hole elastic retaining ring, the pin shaft passes through the tooth seat connecting hole of the tooth seat, and one end of the pin shaft is provided with the screw plug and the hole elastic retaining ring, which can effectively prevent the bucket tooth from falling off.

[0008] As a further implementation manner, the tooth is provided with a through hole at one end and a three-step hole structure at the other end; the three-step hole structure comprises a first step hole, a second step hole and a third step hole arranged in sequence from inside to outside, and the pin shaft, the threaded sleeve and the elastic retaining ring are arranged in the first step hole, the second step hole and the third step hole respectively.

[0009] As a further implementation manner, the first step hole is a through hole, the pin shaft is provided with a shaft shoulder, and the pin shaft is inserted into the through hole through the tooth base connecting hole at one end until the shaft shoulder end face of the pin shaft abuts against the through hole.

[0010] As a further implementation manner, the second step hole is provided with an internal thread, the threaded sleeve is fixed in the second step hole through the internal thread, and the shaft shoulder end face of the other end of the pin shaft is fixed in the three-step hole structure through the threaded sleeve, so that the pin shaft is prevented from moving axially and the tooth is prevented from falling off.

[0011] As a further implementation manner, the third step hole is provided with a groove, and the elastic retaining ring is arranged in the groove, so that the threaded sleeve is prevented from loosening and falling off, and the tooth is further prevented from falling off.

[0012] As a further implementation manner, the first step hole, the second step hole and the third step hole are coaxially arranged.

[0013] As a further implementation manner, the diameters of the first step hole, the second step hole and the third step hole increase in sequence.

[0014] As a further implementation manner, the bottom of the tooth is provided with a square taper hole, the top of the tooth base is provided with a square taper protrusion matched with the square taper hole, and the square taper protrusion is provided with a through tooth base connecting hole.

[0015] As a further implementation manner, the threaded sleeve is a countersunk threaded sleeve, which is convenient to install.

[0016] By adopting the above technical scheme, the utility model has the following beneficial effects:

[0017] 1. The utility model adopts the pin shaft, the threaded sleeve and the elastic retaining ring to connect and fix the tooth and the tooth base, through two sets of safety measures of the threaded sleeve and the elastic retaining ring, the pin shaft is prevented from moving out, the threaded sleeve is prevented from loosening, the connection is stable and reliable, the tooth falling off failure can be effectively avoided, and the service life of the tooth is prolonged.

[0018] 2. The through hole and the three-step hole structure designed at both ends of the tooth can protect the pin shaft from being impacted and abraded by earth and stone materials during excavation, so that the service life of the tooth connecting structure is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0020] Figure 1 It is a schematic diagram of a traditional bucket tooth connecting structure;

[0021] Figure 2 It is an assembly schematic of the embodiment of the present application Figure 1 ;

[0022] Figure 3 It is an assembly schematic of the embodiment of the present application Figure 2 ;

[0023] Figure 4 It is an explosion schematic of the embodiment of the present application Figure 3 ;

[0024] Figure 5 It is a bucket tooth profile schematic of the embodiment of the present application;

[0025] Figure 6 It is a tooth seat structure schematic of the embodiment of the present application.

[0026] In the figure: 1, bucket tooth; 2, tooth seat; 3, hole elastic retainer; 4, threaded plug; 5, pin shaft; 6, internal thread; 7, groove;

[0027] 11, square taper hole; 12, light hole through hole; 13, three-stage stepped hole structure; 14, first-stage hole; 15, second-stage hole; 16, third-stage hole; 21, square taper protrusion; 22, tooth seat connecting hole. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed description is all exemplary, and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as that generally understood by the ordinary skilled in the art to which the present application belongs.

[0029] It should be noted that the terms used herein are only for the purpose of describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form, and in addition, it should be understood that when the terms "comprise" and / or "include" are used in the specification, they indicate the presence of a feature, step, operation, device, component and / or combination thereof. Based on the embodiments in the present application, all other embodiments obtained by the ordinary skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0030] Example 1

[0031] In a typical embodiment of the present application, an anti-falling excavator bucket tooth connection structure is provided, such as Figures 2-6 As shown, it includes a bucket tooth 1 and a tooth seat 2, and a tooth seat connecting hole 22 is opened on the tooth seat 2. The bucket tooth 1 and the tooth seat 2 are connected by a pin 5, a wire plug 4 and an elastic retaining ring 3 for the hole. The pin 5 passes through the tooth seat connecting hole 22 of the tooth seat, and one end of the pin 5 is provided with the wire plug 4 and the elastic retaining ring 3 for the hole, which can effectively prevent the bucket tooth from falling off.

[0032] Specifically, if Figure 2 、 3 As shown in Figures 5 and 6, a light hole 12 is provided at one end of the bucket tooth 1, and a three-stepped hole structure 13 is processed at the other end. The tooth holder 2 is placed between the light hole 12 and the three-stepped hole structure 13. The three-stepped hole structure 13 includes a first-stage hole 14, a second-stage hole 15, and a third-stage hole 16 arranged in sequence from the inside to the outside. The pin 5, the screw plug 4, and the hole elastic circlip 3 are respectively arranged in the first-stage hole 14, the second-stage hole 15, and the third-stage hole 16.

[0033] Specifically, if Figure 5 As shown, the first-stage hole 14 of the bucket tooth is a plain hole for connecting the pin shaft, the second-stage hole 15 is processed with an internal thread 6 for assembling a screw plug, and the third-stage hole 16 is provided with a groove 7 for assembling a hole elastic ring. Figures 2-3 As shown, the pin 5 has shoulders machined on both ends. One end of the pin 5 passes through the first-stage hole 14 and the tooth seat connection hole 22 in sequence and is inserted into the light hole through-hole 12 until the shoulder end face of the pin abuts the light hole through-hole. The shoulder end face of the other end of the pin 5 is fixed in the three-stage stepped hole structure 13 by a screw plug 4. The screw plug 4 is fixed in the second-stage hole 15. The second-stage hole 15 is machined with an internal thread 6 for sealing with the screw plug 4, which can prevent the pin from axially moving out and prevent the bucket teeth from falling off. The third-stage hole 16 has a groove 7, and the hole elastic circlip 3 is installed in the groove 7 to prevent the screw plug from loosening and falling off, which can further prevent the bucket teeth from falling off and improve the reliability of the bucket tooth connection structure.

[0034] like Figure 5 As shown, in this embodiment, the first-stage hole, the second-stage hole and the third-stage hole are coaxially arranged, and the diameters of the first-stage hole, the second-stage hole and the third-stage hole increase successively to achieve the matching fixation of the pin shaft, the wire plug and the elastic retaining ring of the hole.

[0035] Specifically, if Figures 4-6As shown, the bottom of the tooth 1 is provided with a square taper hole 11, and the top of the tooth holder 2 is provided with a square taper protrusion 21 matched with the square taper hole, and a through tooth holder connecting hole 22 is formed in the square taper protrusion 21 to realize the matching and close connection of the tooth and the tooth holder.

[0036] In the embodiment, as shown in the figure, Figure 4 As shown, the thread plug is a countersunk head thread plug, which is convenient to install.

[0037] The assembly process of the embodiment is as follows:

[0038] During normal assembly, the pin shaft is first assembled into the three-stage stepped hole structure of the tooth, sequentially passes through the first-stage hole, the tooth holder connecting hole and the through hole of the light hole at the other end, the shaft shoulder of the pin shaft is assembled in the second-stage hole, and the tooth and the tooth holder are connected through the pin shaft; then the thread plug is assembled in the internal thread hole of the second-stage hole through the internal hexagonal wrench, the shaft shoulder of the thread plug is assembled in the third-stage hole, and after installation, a small gap exists between the pin shaft and the thread plug, which is used for compensating the shaking of the tooth during excavation; finally, the hole elastic check ring is assembled in the groove of the third-stage hole through the use of the circlip pliers.

[0039] After all the parts are assembled in place, the shaft shoulder of the pin shaft is fixed in the second-stage hole by the tooth and the thread plug, and the small gap designed only allows the pin shaft to move in the axial direction; the thread cooperation of the thread plug can limit the axial movement of the pin shaft, and the shaft shoulder of the thread plug is fixed in the third-stage hole by the tooth and the hole elastic check ring, which can prevent the thread from loosening. The whole set of connecting structure adopts two sets of safety measures of the thread plug and the hole elastic check ring to prevent the pin shaft from coming out, and the connection is stable and reliable, which can effectively prevent the tooth from falling off.

[0040] In the embodiment, the pin shaft, the thread plug and the hole elastic check ring are used to realize the anti-falling connection of the tooth and the tooth holder, the whole set of connecting parts are arranged closely and installed compactly, and after the pin shaft is installed in place, the pin shaft does not protrude from the end surface of the tooth, which can avoid the pin shaft from bearing external shearing force, protect the pin shaft from being impacted and worn by earth and stone materials during excavation, and improve the service life of the connecting structure.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them, and those skilled in the art should understand that the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An anti-falling excavator bucket tooth connection structure, characterized in that: The tooth and the tooth seat are connected by a pin shaft, a threaded sleeve and a hole elastic stopper.

2. A demating-resistant excavator bucket tooth connection structure as set forth in claim 1, characterized by The tooth is provided with a light hole through hole at one end and a three-step hole structure at the other end.

3. A demating-resistant excavator bucket tooth connection structure as defined in claim 2, wherein The three-step hole structure comprises a first step hole, a second step hole and a third step hole arranged from inside to outside.

4. A demating-resistant excavator bucket tooth connection structure as defined in claim 3, wherein The first step hole is a light hole, the pin shaft is provided with a shaft shoulder, and the pin shaft is inserted into the light hole through hole through the light hole and the tooth seat connecting hole at one end until the shaft shoulder end face of the pin shaft abuts against the light hole through hole.

5. A demating-resistant excavator bucket tooth connection structure as defined in claim 2, wherein, The second step hole is provided with an internal thread, the threaded sleeve is fixed in the second step hole through the internal thread, and the shaft shoulder end face of the other end of the pin shaft is fixed in the three-step hole structure through the threaded sleeve.

6. A demating-resistant excavator bucket tooth connection structure as defined in claim 2, wherein The third step hole is provided with a groove, and the hole elastic stopper is installed in the groove.

7. A demating-resistant excavator bucket tooth connection structure as defined in claim 2, wherein The first step hole, the second step hole and the third step hole are coaxially arranged.

8. A demating excavator bucket tooth connection structure as defined in claim 1 wherein, The diameters of the first step hole, the second step hole and the third step hole increase in turn.

9. A demating excavator bucket tooth connection structure as defined in claim 1 wherein, The bottom of the tooth is provided with a square taper hole, the top of the tooth seat is provided with a square taper protrusion matched with the square taper hole, and the square taper protrusion is provided with a through tooth seat connecting hole. The threaded sleeve is a countersunk threaded sleeve.

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