Anti-loose bucket tooth and engineering trolley for non-explosive excavation

Abstract

The utility model relates to the field of bucket teeth, in particular to an anti-loose bucket tooth and an engineering trolley for non-explosive excavation, the anti-loose bucket tooth comprises a tooth tip, a tooth holder and a pin shaft, and further comprises a pulling and connecting mechanism, and the pulling and connecting mechanism comprises a pulling and connecting piece; a groove is formed in the tooth holder; the pulling and connecting piece is arranged in the groove and is limited to move forwards; and the front end of the pulling and connecting piece is connected with the pin shaft in a position adjustable manner. According to the utility model, the pin shaft is always pulled by the pull connecting piece to move backwards, so that the tooth tip and the tooth holder are driven to be tightly combined all the time, and looseness is avoided. If the slot of the tooth tip is expanded after long-term use, the connection tightness between the pull connecting piece and the pin shaft can be adjusted again, the tensioning effect of the pull connecting piece on the pin shaft is enhanced, the tooth tip further moves towards the tooth holder, and therefore the tooth tip and the tooth holder are tightly attached again.

Description

Technical Field

[0001] The utility model relates to the field of bucket teeth, in particular to a loosening-preventing bucket tooth. Background Art

[0002] The bucket tooth is a commonly used component for rock breaking in an excavator or a high-frequency breaker, and is also a very important component. The bucket tooth is similar to human teeth and is also a vulnerable part. It is a combined bucket tooth composed of a tooth base and a tooth tip (also called a tooth sleeve), and the two are connected by a pin shaft. Since the worn and ineffective part of the bucket tooth is the tooth tip, as long as the tooth tip is replaced, the normal operation of the whole bucket tooth can be ensured.

[0003] At present, the bucket tooth usually connects the tooth base and the tooth tip together through a pin shaft. There is an annular groove at the end of the pin shaft, and a circlip is placed in the annular groove to prevent the pin shaft from withdrawing. In this structure, the tooth tip is only connected to the tooth base through the pin shaft, and the assembly position of the tooth tip on the tooth base is determined by the pin shaft. Therefore, it cannot be ensured that the corresponding mating surfaces of the tooth tip and the tooth base can be completely fitted, but there may be a certain gap. After the assembly is completed, the tooth tip can be shaken only by manpower. If there is a certain gap between the corresponding mating surfaces of the tooth tip and the tooth base, it will lead to an unsatisfactory fitting effect between the corresponding mating surfaces of the tooth tip and the tooth base, and further accelerate the wear of the tooth tip and the tooth base. In this case, when the bucket tooth is struck during use, each strike will form an impact between the tooth tip and the tooth base, and this impact will gradually expand the inner conical surface (i.e., the mating surface for assembling with the tooth base) of the tooth tip. When the inner conical surface of the tooth tip expands to a certain extent, the tooth tip will move towards the tooth base. When the tooth tip moves to a certain position, the impact force received by the tooth tip will be transmitted to the pin shaft. Over time, the pin shaft will be broken by the force, which will cause the tooth tip to fall off the tooth base. Summary of the Utility Model

[0004] In view of this, the utility model provides a loosening-preventing bucket tooth and an engineering vehicle for non-explosive excavation, aiming to avoid loosening between the tooth tip and the tooth base in the bucket tooth.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0006] A loosening-preventing bucket tooth includes a tooth tip, a tooth base and a pin shaft, and further includes a pulling mechanism. The pulling mechanism includes a pulling member; a groove is provided on the tooth base; the pulling member is arranged in the groove and is restricted from moving forward; the front end of the pulling member is connected with the pin shaft in an adjustable position.

[0007] In some alternative embodiments, a second insertion hole for the pin shaft to pass through is provided on the tooth base; the groove is provided behind the second insertion hole, and the groove includes a first clamping groove and a second clamping groove; the front end of the first clamping groove communicates with the second insertion hole, and the rear end of the first clamping groove communicates with the front end of the second clamping groove; the pulling member includes a rod portion and a head portion; the rod portion is arranged in the first clamping groove and its front end is adjustably connected to the position of the pin shaft; the head portion is arranged in the second clamping groove.

[0008] In some alternative embodiments, the pulling mechanism further includes a backing plate, and the backing plate is arranged in the second clamping groove and sleeved on the rod portion of the pulling member.

[0009] In some alternative embodiments, the pulling mechanism further includes a limiting block, and the limiting block is clamped in the groove and clamped with the rear end of the pulling member.

[0010] In some alternative embodiments, the rear end of the pulling member has a clamping groove; the front end of the limiting block has a protruding portion that is used in cooperation with the clamping groove.

[0011] In some alternative embodiments, the rear end of the limiting block also has a protruding portion.

[0012] In some alternative embodiments, a locking member is further included; a through hole is provided on the limiting block; the locking member is connected to the tooth base after passing through the through hole on the limiting block.

[0013] In some alternative embodiments, there are two grooves, which are respectively located on the left and right sides of the tooth base; there are two pulling mechanisms, which are respectively arranged in the two grooves; a locking member is further included; a third insertion hole penetrating through the two grooves is further provided on the tooth base, and the locking member passes through the third insertion hole and is simultaneously connected to the two limiting blocks.

[0014] In some alternative embodiments, the length of the second insertion hole in the front-rear direction is greater than the length of the pin shaft in the front-rear direction.

[0015] An engineering trolley for non-explosive excavation includes the anti-loosening bucket tooth as described above.

[0016] In summary, compared with the prior art, the present utility model has the following advantages and beneficial effects: In the present utility model, the pin shaft is always pulled backward by the pulling member, so as to drive the tooth tip and the tooth base to always maintain a tight combination and avoid loosening. If the slot of the tooth tip is enlarged after long-term use, at this time, the connection tightness between the pulling member and the pin shaft can be adjusted again to enhance the pulling effect of the pulling member on the pin shaft, so that the tooth tip moves further towards the tooth base, so that the tooth tip and the tooth base are again kept in close fit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the anti-loosening bucket tooth described in the present utility model.

[0018] Figure 2 This is a front-view structural schematic diagram of the anti-loosening bucket tooth described in the present utility model.

[0019] Figure 3 is Figure 2 a sectional structural schematic diagram in the A-A direction in

[0020] Figure 4 This is a structural schematic diagram of the tooth tip in the anti-loosening bucket tooth described in the present utility model.

[0021] Figure 5 This is a structural schematic diagram of the tooth socket in the anti-loosening bucket tooth described in the present utility model.

[0022] Figure 6 This is a schematic diagram of the assembly relationship between the pulling mechanism, the pin shaft and the locking part in the anti-loosening bucket tooth described in the present utility model.

[0023] Figure 7 is Figure 6 a structural schematic diagram of the structure shown after omitting a limit block and a backing plate.

[0024] The interpretations of each label in the figure are as follows: tooth tip 1, slot 11, first insertion hole 12, tooth socket 2, second insertion hole 21, third insertion hole 22, groove 23, first card slot 231, second card slot 232, pin shaft 3, pulling mechanism 4, pulling part 41, rod part 411, head part 412, clamping slot 413, backing plate 42, limit block 43, protruding part 431, locking part 5. Specific embodiments

[0025] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below in conjunction with specific embodiments.

[0026] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0027] In the description of the present utility model, the meaning of "a number of" is one or more, the meaning of "a plurality of" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there are descriptions of similar terms such as "first", "second", etc., they are only used for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0028] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0029] Embodiment 1

[0030] As Figures 1-3 shown, a kind of anti-loosening bucket tooth described in the embodiment of the present application includes a tooth tip 1, a tooth seat 2 and a pin shaft 3. For the convenience of description, a spatial rectangular coordinate system shown in the attached drawing is introduced to explain the related structure of the embodiment of the present application. Among them, the direction shown by the X-axis is the front, the direction shown by the Y-axis is the left, and the direction shown by the Z-axis is the upper.

[0031] Among them, as Figure 4 shown, the rear end of the tooth tip 1 has a slot 11, and first insertion holes 12 are respectively arranged on the left and right sides of the part where the slot 11 is located.

[0032] As Figure 5 shown, the front part of the tooth seat 2 has a second insertion hole 21 that penetrates in the left-right direction.

[0033] The pin shaft 3 passes through the first insertion hole 12 and the second insertion hole 21 at the same time to connect the tooth tip 1 and the tooth seat 2 together. Considering that as the working time increases, the slot 11 of the tooth tip 1 may expand and move closer to the tooth seat 2, the second insertion hole 21 can be designed as a long strip hole extending in the front-rear direction, that is, the length of the second insertion hole 21 in the front-rear direction is greater than the length of the pin shaft 3 in the front-rear direction, so that the pin shaft 3 can move backward within a limited range.

[0034] In order to avoid loosening between the tooth tip 1 and the tooth seat 2, as Figures 1-3 shown, the embodiment of the present application further includes a pulling mechanism 4.

[0035] As Figure 6 shown, the pulling mechanism 4 mainly includes two pulling members 41.

[0036] As Figure 5As shown, the left and right sides of the tooth base 2 are respectively provided with grooves 23 arranged in the front-rear direction to respectively accommodate two connecting members 41. Moreover, the grooves 23 can also limit the forward movement of the connecting members 41 therein, that is, during use, the front end of the connecting member 41 abuts against the front side wall of the groove 23.

[0037] As Figure 3 and Figure 6 shown, the front ends of the two connecting members 41 are simultaneously connected to the pin shaft 3 in an adjustable position.

[0038] The connecting mechanism 4 realizes the tension between the tooth tip 1 and the tooth base 2 in the following way: During use, first, the tooth tip 1 is sleeved on the tooth base 2, and the first insertion hole 12 is aligned with the second insertion hole 21. Then, the pin shaft 3 is inserted into the first insertion hole 12 and the second insertion hole 21. After that, the two connecting members 41 are respectively installed in the grooves 23 on the left and right sides of the tooth base 2, and then the front end of the connecting member 41 is connected to the pin shaft 3 and the connecting member 41 is prevented from moving forward in the groove 23. In this way, the pin shaft 3 is always pulled backward by the connecting member 41, thereby driving the tooth tip 1 and the tooth base 2 to always maintain a tight combination and avoid loosening. If the slot 11 of the tooth tip 1 is enlarged after long-term use, at this time, the connection tightness between the connecting member 41 and the pin shaft 3 can be adjusted again to enhance the tension of the connecting member 41 on the pin shaft 3, so that the tooth tip 1 moves further towards the tooth base 2, thereby making the tooth tip 1 and the tooth base 2 fit tightly again.

[0039] As an optional structural form for the groove 23 to limit the forward movement of the connecting member 41, as Figure 5 shown, the groove 23 is arranged behind the second insertion hole 21, and the groove 23 can include a first card slot 231 and a second card slot 232. The front end of the first card slot 231 is communicated with the second insertion hole 21, the rear end of the first card slot 231 is communicated with the front end of the second card slot 232, and the size of the first card slot 231 is smaller than the size of the second card slot 232. Here, the size mainly refers to the height dimension in the Z-axis parallel direction and the width dimension in the Y-axis parallel direction.

[0040] As Figures 1-3 , Figures 5-6 shown, the connecting member 41 includes a rod portion 411 and a head portion 412. The rod portion 411 is arranged in the first card slot 231 and the front end of the rod portion 411 is connected to the pin shaft 3 in an adjustable position; the head portion 412 is arranged in the second card slot 232, and the size of the head portion 412 is larger than the size of the first card slot 231. Here, the size also mainly refers to the height dimension in the Z-axis parallel direction and the width dimension in the Y-axis parallel direction.

[0041] In this way, the head 412 of the connecting member 41 is restricted from moving forward within the second card slot 232 because it cannot pass through the first card slot 231, thereby restricting the entire connecting member 41 from moving forward.

[0042] The position between the connecting member 41 and the pin shaft 3 can be adjusted and the tension force therebetween can be adjusted by screwing. For example, external threads can be provided at the front end of the rod portion 411, and threaded holes for mating with the external threads can be provided on the pin shaft 3. This connection method is simple and reliable, easy to process, and also facilitates the adjustment of the tension force between the connecting member 41 and the pin shaft 3.

[0043] The connecting member 41 having the rod portion 411 and the head 412 here can also be said to be a bolt. Therefore, a backing plate 42 can also be installed on the bolt to protect the connection surface from being scratched and to disperse the pressure at the connection. As Figure 3 、 Figures 5-7 shown, two backing plates 42 are respectively disposed within two second card slots 232 and respectively sleeved on the rod portions 411 of the two connecting members 41, and the size of the backing plate 42 is larger than the size of the first card slot 231. The size here also refers to the height dimension in the Z-axis parallel direction and the width dimension in the Y-axis parallel direction.

[0044] During the operation of the bucket tooth, especially during the operation of the high-frequency breaker, it will vibrate back and forth at a high frequency due to the exciting force. Over time, it is possible that the connection between the connecting member 41 and the pin shaft 3 becomes loose. For example, when they are connected by screwing, the connecting member 41 itself may rotate and become loose, resulting in its inability to always maintain a tensioning effect on the pin shaft 3. As Figures 1-3 、 Figures 6-7 shown, the connecting mechanism 4 described in the embodiment of the present application further includes two limit blocks 43. The two limit blocks 43 are respectively clamped within the two grooves 23 and respectively clamped with the rear ends of the two connecting members 41 to prevent the connecting member 41 from rotating, thereby preventing loosening between the connecting member 41 and the pin shaft 3.

[0045] For example, the second card slot 232 of the groove 23 can be a groove with a rectangular cross-section, and the limit block 43 can be a generally rectangular block. Therefore, after the limit block 43 is placed in the second card slot 232, the limit block 43 can be prevented from rotating within the second card slot 232.

[0046] Correspondingly, as Figure 7As shown, a clamping groove 413 may be provided at the rear end of the connecting member 41, and a protruding portion 431 adapted to cooperate with the clamping groove 413 may be provided at the front end of the limiting block 43. For example, the cross-section of the clamping groove 413 is a regular polygon, and the shape of the protruding portion 431 is a regular prism, and the number of sides of both is the same, for example, both are hexagons. In this way, after the protruding portion 431 on the limiting block 43 is inserted into the clamping groove 413 of the connecting member 41, since the limiting block 43 cannot rotate in the groove 23, the connecting member 41 clamped to the limiting block 43 cannot rotate either, thereby preventing loosening between the connecting member 41 and the pin shaft 3.

[0047] A protruding portion 431 may also be provided at the rear end of the limiting block 43, and the protruding portion 431 has the same shape as the protruding portion 431 provided at the front end of the limiting block 43. The provision of protruding portions 431 at both the front and rear ends of the limiting block 43 facilitates the assembly of the limiting block 43 in the groove 23, that is, it is not necessary to strictly distinguish between the left and right and the front and rear of the limiting block 43, improving the assembly efficiency. In addition, if one of the protruding portions 431 of the limiting block 43 is deformed and cannot cooperate with the clamping groove 413 to limit the rotation of the connecting member 41, another protruding portion 431 can still be used to cooperate with the clamping groove 413 to limit the rotation of the connecting member 41.

[0048] In addition, to prevent the limiting block 43 from sliding in the groove 23 or falling off from the groove 23, as Figures 1-3 、 Figures 6-7 shown, the embodiment of the present application may further include a locking member 5. A third insertion hole 22 penetrating through the two grooves 23 is further provided on the tooth base 2, and the locking member 5 passes through the third insertion hole 22 and is connected to the two limiting blocks 43 at the same time. Since the limiting block 43 is located in the second clamping groove 232, both ends of the third insertion hole 22 are also located in the second clamping groove 232. The two limiting blocks 43 are connected into one body by the locking member 5, and the locking member 5 is restricted by the third insertion hole 22 and cannot move forward and backward or up and down, so the limiting block 43 cannot move forward and backward or up and down either. Coupled with the fact that the limiting block 43 is clamped in the groove 23 and cannot rotate and is connected to the limiting block 43 to prevent it from moving left and right, the combination of the above methods restricts all degrees of freedom of the limiting block 43, and the limiting block 43 cannot move in any way in the groove 23, thereby further ensuring that the position of the connecting member 41 cannot move in any way, and further ensuring that there will be no loosening between the connecting member 41 and the pin shaft 3, and the tooth tip 1 and the tooth base 2 can always be kept in close contact.

[0049] As an optional implementation manner, through holes for the locking member 5 to pass through may be provided on both of the two limiting blocks 43. The locking member 5 includes a bolt and a nut, and the bolt passes through the through holes on the two limiting blocks 43 and is connected to the nut. This connection method is simple and reliable, convenient to operate, and low in manufacturing cost.

[0050] As another alternative embodiment, two locking members 5 may be provided, and the locking member 5 is preferably a bolt. The third insertion hole 22 on the tooth base 2 may be designed as a threaded hole, so that for each limiting block 43, a locking member 5 can be individually passed through the through hole on the limiting block 43 and then connected to the tooth base 2.

[0051] In the embodiment of the present application, the pulling mechanism 4 includes a pulling member 41, a backing plate 42, and a limiting block 43. The foregoing has described the structure and working principle of the pulling mechanism 4 by taking two pulling mechanisms 4 as an example. However, obviously, the pulling mechanism 4 in the embodiment of the present application may also be provided with one or more. Correspondingly, the grooves 23 of the tooth base 2 may also be provided with one or more accordingly, and the technical effects are similar to the foregoing content and will not be elaborated. In addition, a locking member 5 may be provided corresponding to each pulling mechanism 4. When the limiting blocks 43 in a plurality of pulling mechanisms 4, for example, the limiting blocks 43 in the foregoing two pulling mechanisms 4, can be simultaneously passed through and connected by a locking member 5, the number of locking members 5 provided can be correspondingly reduced.

[0052] Embodiment Two

[0053] The present application also introduces an engineering trolley for non-explosive excavation, which includes the anti-loosening bucket tooth described in Embodiment One. When the engineering trolley with this anti-loosening bucket tooth is operating, there is no need to worry about the loosening of the tooth tip 1, so that the operation can be carried out continuously and efficiently, thereby improving the construction efficiency.

[0054] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should be considered as the scope described in this specification.

[0055] The above preferred embodiments should not be regarded as limitations on the present invention. The protection scope of the present invention should be defined by the scope of the claims. For those of ordinary skill in the art of this technology, without departing from the spirit and scope of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A locking prevention bucket tooth, comprising a tooth tip (1), a tooth seat (2) and a pin shaft (3), characterized in that: It further includes a connecting mechanism (4), and the connecting mechanism (4) includes a connecting piece (41); A groove (23) is provided on the tooth base (2); the connecting piece (41) is arranged in the groove (23) and is restricted from moving forward; the front end of the connecting piece (41) is adjustably connected to the pin shaft (3).

2. The anti-loosening bucket tooth according to claim 1, characterized in that: A second insertion hole (21) for the pin shaft (3) to pass through is provided on the tooth base (2); The groove (23) is arranged behind the second insertion hole (21), and the groove (23) includes a first clamping groove (231) and a second clamping groove (232); the front end of the first clamping groove (231) communicates with the second insertion hole (21), and the rear end of the first clamping groove (231) communicates with the front end of the second clamping groove (232); The connecting piece (41) includes a rod portion (411) and a head portion (412); the rod portion (411) is arranged in the first clamping groove (231) and its front end is adjustably connected to the pin shaft (3); the head portion (412) is arranged in the second clamping groove (232).

3. The anti-loosening bucket tooth according to claim 2, characterized in that: The connecting mechanism (4) further includes a backing plate (42), and the backing plate (42) is arranged in the second clamping groove (232) and sleeved on the rod portion (411) of the connecting piece (41).

4. The anti-loosening bucket tooth according to claim 1, characterized in that: The connecting mechanism (4) further includes a limiting block (43), and the limiting block (43) is clamped in the groove (23) and is clamped with the rear end of the connecting piece (41).

5. The anti-loosening bucket tooth according to claim 4, characterized in that: The rear end of the connecting piece (41) has a clamping groove (413); the front end of the limiting block (43) has a protruding portion (431) that is used in cooperation with the clamping groove (413).

6. The anti-loosening bucket tooth according to claim 5, wherein: The rear end of the limiting block (43) also has a protruding portion (431).

7. The anti-loosening bucket tooth according to claim 4, characterized in that: It further includes a locking piece (5); a through hole is provided on the limiting block (43); the locking piece (5) passes through the through hole on the limiting block (43) and then is connected to the tooth base (2).

8. The anti-loosening bucket tooth according to claim 4, characterized in that: There are two grooves (23) which are respectively located on the left and right sides of the tooth base (2); There are two connecting mechanisms (4) which are respectively arranged in the two grooves (23); It further includes a locking piece (5); a third insertion hole (22) penetrating through the two grooves (23) is further provided on the tooth base (2), and the locking piece (5) passes through the third insertion hole (22) and then is connected to the two limiting blocks (43) at the same time.

9. The anti-loosening bucket tooth according to claim 2, wherein: The length of the second insertion hole (21) in the front-rear direction is greater than the length of the pin shaft (3) in the front-rear direction.

10. An engineering trolley for non-explosive excavation, characterized in that: It includes the anti-loosening bucket tooth according to any one of claims 1-9.

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