Locking mechanism and excavator bucket device

Abstract

The utility model relates to the technical field of industrial excavating machine accessories. A locking mechanism comprises a U-shaped groove arc locking piece, a bucket tooth, a bolt component and a tooth sleeve. The U-shaped groove arc locking piece comprises a half-crescent part and a shaped groove part; the half-crescent part forms a half-crescent part with one flat end and the other thick end through a lower arc part and an upper arc part, the lower arc part and the upper arc part are connected at the flat end and separated at the thick end, the gear sleeve comprises an inner arc part and a release part, the upper arc of the inner arc part is matched with the arc of the upper end of the locking part, and the lower arc of the inner arc part is matched with the lower arc part. The excavator bucket device comprises an excavator bucket main body and a locking mechanism, the structures and the connection matching relation of all components of the locking mechanism are specifically set, so that the easily-worn component bucket teeth of the excavator bucket device can be simply disassembled in real time, the durability and convenience of the excavator bucket device are greatly improved, all the components generate a very strong tight matching relation, and the service life of the excavator bucket device is prolonged. Mutual movement is avoided, the service life of parts is prolonged, and due to the fact that a tooth holder structure of a traditional excavator bucket is omitted, the condition of tooth holder breakage is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial excavator accessories, and in particular relates to a locking mechanism and a bucket device. Background Art

[0002] The bucket teeth of the excavator bucket are subject to the most collision and friction with the material, so the impact force on the bucket teeth is the greatest, so the wear resistance and stability of the bucket teeth are relatively high. Traditional excavation systems weld tooth seats on the blade and then connect them to the bucket teeth through cylindrical pins. During long-term operation, the tooth seats are prone to breakage and the bucket teeth are prone to loosening, which will seriously affect work efficiency.

[0003] Chinese utility model patent publication CN210440342U discloses a bolt-type crescent-shaped locking device, which is suitable for locking connections of different types of modules and reduces damage to the modules caused by welding processes. Chinese utility model patent publication CN210482442U discloses a single crescent-shaped locking single hook tooth, which realizes detachable locking of components through a crescent-shaped locking piece. However, these locking devices are not specifically applicable to bucket devices. Utility Model Content

[0004] In view of the above technical problems, the purpose of the utility model is to propose a locking mechanism and a bucket device which are free of tooth seats, have built-in bucket teeth, and are fixed by U-groove arc locking pins.

[0005] This is achieved through the following technical means:

[0006] A locking mechanism comprises a U-groove arc locking piece, a bucket tooth, a bolt component and a gear sleeve.

[0007] The bucket tooth includes a tooth tip and a locking portion. The tooth tip is a wedge-shaped structure with one end being thin and the other end being thick. One end of the locking portion is connected to the thick end of the tooth tip, and the other end of the locking portion is extended through arc structures at the upper and lower ends.

[0008] The U-groove arc locking piece includes a semi-crescent portion and a profile groove portion; the semi-crescent portion is formed by a lower arc portion and an upper arc portion to form a semi-crescent portion with one end flat and the other end thick, the lower arc portion and the upper arc portion are connected at the flat end and separated at the thick end, and the shape of the upper arc portion is consistent with the shape of the arc structure at the lower end of the bucket tooth locking portion; the profile groove portion is a rectangular plate or a trapezoidal plate with a U-shaped groove, and the thick end of the semi-crescent portion is fixedly connected to the non-open end of the profile groove portion.

[0009] The bolt component includes a screw rod and a nut.

[0010] The tooth sleeve includes an inner arc portion and a release portion, the inner arc portion is arranged inside the tooth sleeve, and the upper arc of the inner arc portion matches the upper end arc of the bucket tooth locking portion, and the lower arc of the inner arc portion matches the lower arc of the semi-crescent portion; the release portion is connected to the inside of the inner arc portion and has an opening at the bottom, and a through hole is provided at the top of the release portion for the screw to pass through.

[0011] The arcuate surfaces of the arcuate structures at the upper and lower ends of the bucket tooth are closest to the center line of the locking portion at non-ends.

[0012] In the locked state, at any longitudinal section of the inner arc portion, the height of the inner arc portion is equal to or substantially equal to the sum of the height of the half-moon portion and the height of the locking portion of the bucket tooth; or, in the locked state, at the longitudinal sections at both ends of the inner arc portion (51), the height of the inner arc portion (51) is equal to or substantially equal to the sum of the height of the half-moon portion (21) and the height of the locking portion (32) of the bucket tooth (3), and at the longitudinal sections of the inner arc portion (51) other than the two end portions, the height of the inner arc portion (51) is greater than the sum of the height of the half-moon portion (21) and the height of the locking portion (32) of the bucket tooth (3).

[0013] Preferably, the width of the U-shaped groove on the profile portion is greater than or equal to the diameter of the screw.

[0014] Preferably, an outwardly protruding arc portion is provided at the connection point between the release portion and the inner arc portion of the gear sleeve, and the end of the outwardly protruding arc portion abuts against the junction of the semi-crescent portion and the groove portion in the locked state and limits the relative movement of the U-groove arc locking member.

[0015] Preferably, the width and length of the opening of the release portion are greater than the width and length of the profile groove portion of the U-groove arc locking member.

[0016] Preferably, in the locked state, the axis of the through hole arranged at the top of the release portion is perpendicular to the center plane of the profile groove portion of the U-groove arc lock.

[0017] Preferably, in the locked state, the axis of the through hole arranged at the top of the release portion is not arranged perpendicular to the center plane of the locking portion of the bucket tooth.

[0018] Preferably, the width of the U-shaped groove formed on the profile portion is smaller than the outer diameter of the nut.

[0019] Preferably, the angle between the center plane of the profile groove portion and the tangent line at the junction of the semi-crescent portion and the profile groove portion is 33-85°.

[0020] A bucket device comprises a bucket body and a locking mechanism, wherein the locking mechanism is the above-mentioned locking mechanism.

[0021] Preferably, a plurality of locking mechanisms are provided and arranged side by side at the bottom wall of the bucket body, and the outer wall of the tooth sleeve of each locking mechanism is connected to the end of the bottom wall of the bucket body.

[0022] The range limitations such as “upper”, “lower”, “left”, “right”, “front”, “back” and “middle” described in the present invention are all relative positions under specific conditions, rather than absolute positions, and do not limit the range of devices and components.

[0023] The technical effects of the utility model are:

[0024] 1. The utility model sets a U-groove arc lock piece, and matches the semi-crescent portion of its specific structure with the locking portion of the bucket tooth and the inner arc portion of the tooth sleeve, so that the locking portion is first inserted into the inner arc portion from one end, and then the semi-crescent portion is matched with the locking portion from the other direction, so as to form an upper and lower double-arc structure with thick ends and thin middle as a whole. The upper and lower double-arc structures match the inner arc portion of the tooth sleeve (the double arc protruding outward in the middle) to form a locking structure that does not produce relative displacement, so that the force transmitted from the tip of the bucket tooth during operation will be converted into a uniform and stable force on the entire upper and lower double-arc surfaces, so that even if there is vibration, it will not cause excessive wear and will not cause deformation of the components. Compared with the existing excavation system, the bucket tooth assembly set by the utility model is more firm, the service life of the bucket tooth is improved, and the work efficiency is increased.

[0025] 2. The utility model makes the force transmission direction of the U-groove arc lock more evenly distributed when locking through the angle setting of the bolt and the U-groove plane, the matching mode of the U-groove and the bolt, the angle between the semi-crescent part and the U-groove and other specific structural settings, and can form a smoother release angle when releasing the U-groove arc lock, thereby greatly improving the replacement efficiency. In particular, through the arrangement of the above-mentioned angles and structures, the semi-crescent portion can be continuously pressed and extended between the locking portion and the inner arc portion during the gradual tightening of the nut, so that the three form a very tight tight fit relationship, and the fitting clearance tends to zero, so that the locking mechanism as a whole forms a tight fit relationship (that is, at any longitudinal section of the inner arc portion, the sum of the height of the inner arc portion, the height of the semi-crescent portion and the height of the locking portion of the bucket tooth is equal or basically equal), and the screw and the nut always maintain an elastic locking force on the U-groove arc lock, so that the bucket tooth and the tooth sleeve are always in a tensioned state, thereby strengthening the tight fit state, so that the bucket tooth always maintains an unchanged directional displacement relative to the tooth sleeve during operation, so that there is basically no mutual wear during the operation, thereby extending the life of the components, and then the probability of bucket tooth breakage can be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a structural schematic diagram of the bucket device of the utility model.

[0027] Figure 2 The utility model is a schematic diagram of the structure of the bucket device assembly.

[0028] Figure 3 It is a structural schematic diagram of the locking mechanism assembly of the utility model.

[0029] Figure 4 This is a schematic diagram of the appearance structure of the locking mechanism of the utility model in the locked state.

[0030] Figure 5 It is a schematic cross-sectional structural diagram of the locking mechanism of the utility model in a locked state.

[0031] Figure 6 It is a structural schematic diagram of the U-groove arc lock of the utility model.

[0032] Figure 7 It is a schematic cross-sectional structural diagram of the gear sleeve of the utility model.

[0033] Figure 8 The figure is a schematic diagram of the appearance structure of the gear sleeve of the utility model.

[0034] Fig. 9 It is a schematic diagram of the appearance structure of the gear sleeve of the utility model when it is turned over.

[0035] in:

[0036] 1- bucket body, 11- connection part between bucket body and gear sleeve;

[0037] 2-U-groove arc lock, 21-semi-crescent portion, 211-lower arc portion, 212-upper arc portion, 22-groove portion, 221-U-shaped groove;

[0038] 3- bucket tooth, 31- tooth tip, 32- locking part, 33- locking part center line, 34- locking part upper arc, 35- locking part lower arc;

[0039] 4-bolt component, 41-screw rod, 42-nut;

[0040] 5-tooth sleeve, 51-inner arc portion, 511-arc portion at the upper part of the inner arc portion, 512-arc portion at the lower part of the inner arc portion, 513-end part of the arc portion, 52-releasing portion, 53-through hole of the releasing portion. DETAILED DESCRIPTION

[0041] The process technology scheme of the utility model is further described below by combining embodiments and drawings. Unless otherwise described, each feature is only an example of a series of equivalent or similar features. It is only to help understand the utility model. Those skilled in the art should understand that the embodiments are only to help understand the utility model and should not be regarded as specific limitations of the utility model.

[0042] Example 1

[0043] like Figures 3 to 9 A locking mechanism as shown, Figure 3 and Figure 4 The figure shows a U-groove arc lock part 2, a bucket tooth 3, a bolt part 4 and a tooth sleeve 5.

[0044] like Figure 3 and Figure 5 As shown, the bucket tooth 3 includes a tooth tip portion 31 and a locking portion 32. The tooth tip portion 31 is a wedge-shaped structure with one end being thin and the other end being thick. One end of the locking portion 32 is connected to the thick end of the tooth tip portion 31, and the other end of the locking portion 32 is extended through the arc structures at the upper and lower ends to form an upper arc structure and a lower arc structure.

[0045] like Figure 3 , Figure 5 and Figure 6 As shown, the U-groove arc locking member 2 includes a semi-crescent portion 21 and a profiled groove portion 22; the semi-crescent portion 21 is formed by a lower arc portion 211 and an upper arc portion 212 to form a semi-crescent portion 21 with one end flat and the other end thick, the lower arc portion 211 and the upper arc portion 212 are connected at the flat end and separated at the thick end, and the shape of the upper arc portion 212 is consistent with the shape of the lower end arc structure of the bucket tooth locking portion (i.e., the lower arc 35 of the locking portion); the profiled groove portion 22 is a rectangular plate or a trapezoidal plate with a U-shaped groove 221, and the thick end of the semi-crescent portion 21 is fixedly connected to the non-open end of the profiled groove portion 22.

[0046] The bolt component 4 includes a screw rod 41 and a nut 42 .

[0047] like Figure 7 and Figure 8 as well as Fig. 9 As shown, the tooth sleeve 5 includes an inner arc portion 51 and a release portion 52. The inner arc portion 51 is arranged inside the tooth sleeve 5, and includes an arc portion 511 at the upper part of the inner arc portion and an arc portion 512 at the lower part of the inner arc portion. The arc portion 511 at the upper part of the inner arc portion matches with the upper arc of the locking portion 32 of the bucket tooth 3, and the arc portion 512 at the lower part of the inner arc portion matches with the lower arc portion 211 of the semi-crescent portion 21; Fig. 9The release portion 52 shown is connected to the interior of the inner arc portion 51 and has an opening at the bottom. A through hole (forming a through hole 53 of the release portion) is provided at the top of the release portion 52 for the screw rod 41 to pass through.

[0048] like Figure 3 As shown, the arc surfaces of the arc structures at the upper and lower ends of the bucket tooth 3 are closest to the center line 33 of the locking portion at non-ends. Figure 5 As shown, the upper arc 34 of the locking portion and the lower arc 35 of the locking portion both gradually extend from both ends toward the center line 33 of the locking portion, and then continue to extend in the direction away from the center line 33 of the locking portion, so that the closest point to the center line 33 of the locking portion is not the two end portions, so that when the semi-crescent portion 21 is inserted, locking forces in all directions are formed between the locking portion 32 and the inner arc portion 51 of the tooth sleeve 5.

[0049] like Figure 5 As shown, in the locked state, at any longitudinal section of the inner arc portion 51, the height of the inner arc portion 51 is equal to or substantially equal to the sum of the height of the half-moon portion 21 and the height of the locking portion 32 of the bucket tooth 3. This ensures that the three components are in close contact in the locked state to form a tight fit. In some other embodiments, at non-end portions, the height of the inner arc portion 51 may be greater than the sum of the height of the half-moon portion 21 and the height of the locking portion 32 of the bucket tooth 3, so that a gap may be formed at non-end portions (i.e., the middle portion).

[0050] like Figure 5 As shown, the width of the U-shaped groove 221 on the groove portion 22 is greater than or equal to the diameter of the screw 41, and the width of the U-shaped groove 221 on the groove portion 22 is smaller than the outer diameter of the nut 42. Thus, the screw 41 can be inserted and the nut 42 can be tightened to tighten the U-shaped groove 221.

[0051] like Figure 5 and Figure 7 As shown, the place where the release portion 52 of the tooth sleeve 5 communicates with the inner arc portion 51 is provided with an arc portion protruding outward (including an arc portion 511 at the upper part of the inner arc portion and an arc portion 512 at the lower part of the inner arc portion), and the end portion 513 of the arc portion protruding outward abuts against the junction of the semi-crescent portion 21 and the profile groove portion 22 in the locked state and restricts the relative movement of the U-groove arc locking member 2. The arc formed by the semi-crescent portion 21 and the locking portion 32 of the bucket tooth 3 as a whole wraps the arc of the tooth sleeve 5.

[0052] like Figure 5 As shown, the width and length of the opening of the release portion 52 are greater than the width and length of the profile groove portion 22 of the U-groove arc lock 2. Thus, the U-groove arc lock 2 can be taken out as a whole when released.

[0053] like Figure 5As shown, in the locked state, the axis of the through hole set at the top of the release portion 52 is perpendicular to the center plane of the profile portion 22 of the U-groove arc lock 2. Thus, the fixity of the U-groove arc lock 2 is guaranteed in the locked state, and each component can be in a tight fit state at all times.

[0054] like Figure 5 As shown, in the locked state, the axis of the through hole arranged at the top of the release portion 52 is not perpendicular to the center plane of the locking portion 32 of the bucket tooth 3.

[0055] like Figure 5 As shown, the angle between the center plane of the profile groove portion 22 and the tangent line at the junction of the semi-crescent portion 21 and the profile groove portion 22 is 50°.

[0056] Example 2

[0057] like Figure 1 and Figure 2 A bucket device is shown, the bucket device comprises a bucket body 1 and a locking mechanism, the locking mechanism is the locking mechanism shown in Example 1. Figure 1 and Figure 2 As shown, in this embodiment, there are five locking mechanisms, which are arranged side by side at the bottom wall of the bucket body 1, and the outer wall of the tooth sleeve 5 of each locking mechanism is connected to the end of the bottom wall of the bucket body 1. Figure 4 As shown, the tooth sleeve 5 is fixedly connected to the bottom wall end of the bucket body 1 through the two side walls of the tooth sleeve 5, and as shown in Figure 4 As shown, the connection point is the connection part 11 between the bucket body and the gear sleeve.

[0058] Comparative Example 1

[0059] This comparative example shows an example of using bolts to directly fix the bucket teeth to the tooth sleeve to form a bucket device. The material used is exactly the same as that of Example 1. Through 1000 times of strengthening comparison experiments with the same strength as Example 2, it is found that the wear thickness of the hole where the bucket teeth of this comparative example are connected to the bolts is 1.35mm, while all parts in the locking mechanisms of the bucket device of Example 2 are not found to have wear exceeding 0.1mm. This shows that the matching mode between the various parts of the locking mechanism set in the utility model, especially the tight matching mode, can greatly reduce wear while ensuring easy disassembly.

[0060] The known technologies in the art involved in the present utility model are not described in detail. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A locking mechanism, characterized in that: It comprises a U-groove arc lock component (2), a bucket tooth (3), a bolt component (4) and a tooth sleeve (5); The bucket tooth (3) comprises a tooth tip portion (31) and a locking portion (32), wherein the tooth tip portion (31) is a wedge-shaped structure with one end being thin and the other end being thick, one end of the locking portion (32) is connected to the thick end of the tooth tip portion (31), and the other end of the locking portion (32) is extended through arc structures at upper and lower ends; The U-groove arc locking member (2) comprises a semi-crescent portion (21) and a profiled groove portion (22); the semi-crescent portion (21) is formed by a lower arc portion (211) and an upper arc portion (212) to form a semi-crescent portion (21) with one end flat and the other end thick, the lower arc portion (211) and the upper arc portion (212) being connected at the flat end and separated at the thick end, and the shape of the upper arc portion (212) is consistent with the shape of the arc structure at the lower end of the locking portion (32) of the bucket tooth; the profiled groove portion (22) is a rectangular plate or a trapezoidal plate on which a U-shaped groove (221) is provided, and the thick end of the semi-crescent portion (21) is fixedly connected to the non-open end of the profiled groove portion (22); The bolt component (4) comprises a screw rod (41) and a nut (42); The gear sleeve (5) comprises an inner arc portion (51) and a release portion (52), wherein the inner arc portion (51) is arranged inside the gear sleeve (5), and the upper arc of the inner arc portion (51) matches the upper arc of the locking portion (32) of the bucket tooth (3), and the lower arc of the inner arc portion (51) matches the lower arc portion (211) of the semi-crescent portion (21); the release portion (52) is connected to the inside of the inner arc portion (51) and has an opening at the bottom, and a through hole is arranged at the top of the release portion (52) for the screw (41) to penetrate through; The arcuate surfaces of the arcuate structures at the upper and lower ends of the bucket tooth (3) are closest to the center line (33) of the locking portion, which is not the end portions; In the locked state, at any longitudinal section of the inner arc portion (51), the sum of the height of the inner arc portion (51), the height of the semi-crescent portion (21), and the height of the locking portion (32) of the bucket tooth (3) is equal or substantially equal; Alternatively, in the locked state, at the longitudinal sections at the two end portions of the inner arc portion (51), the height of the inner arc portion (51), the height of the semi-crescent portion (21), and the height of the locking portion (32) of the bucket tooth (3) are equal to or substantially equal to each other, and at the longitudinal sections at the non-end portions of the inner arc portion (51), the height of the inner arc portion (51) is greater than the sum of the height of the semi-crescent portion (21) and the height of the locking portion (32) of the bucket tooth (3).

2. The locking mechanism according to claim 1, characterized in that: The width of the U-shaped groove (221) formed on the groove portion (22) is greater than or equal to the diameter of the screw rod (41).

3. The locking mechanism according to claim 1, characterized in that: An outwardly protruding arc portion is provided at the point where the release portion (52) of the gear sleeve (5) communicates with the inner arc portion (51); the end of the outwardly protruding arc portion abuts against the junction of the semi-crescent portion (21) and the profile groove portion (22) in a locked state and restricts the relative movement of the U-groove arc locking member (2).

4. The locking mechanism according to claim 1, characterized in that: The width and length of the opening formed by the release portion (52) are both greater than the width and length of the profile groove portion (22) of the U-groove arc locking member (2).

5. The locking mechanism according to claim 1, characterized in that: In the locked state, the axis of the through hole arranged at the top of the release portion (52) is perpendicular to the center plane of the profile groove portion (22) of the U-groove arc locking piece (2).

6. The locking mechanism according to claim 1, characterized in that: In the locked state, the axis of the through hole arranged at the top of the release portion (52) is not arranged perpendicular to the center plane of the locking portion (32) of the bucket tooth (3).

7. The locking mechanism according to claim 2, characterized in that: The width of the U-shaped groove (221) formed on the groove portion (22) is smaller than the outer diameter of the nut (42).

8. The locking mechanism according to any one of claims 1 to 7, characterized in that: The angle between the central plane of the profile groove portion (22) and the tangent line at the junction of the semi-crescent portion (21) and the profile groove portion (22) is 33-85°.

9. A bucket device, characterized in that: The bucket device comprises a bucket body (1) and a locking mechanism, and the locking mechanism is the locking mechanism according to any one of claims 1 to 8.

10. The bucket device according to claim 9, characterized in that: A plurality of locking mechanisms are provided and arranged side by side at the bottom wall of the bucket body (1); the outer wall of the tooth sleeve (5) of each locking mechanism is connected to the end of the bottom wall of the bucket body (1).

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