A milling wheel with mixed teeth and a slot milling machine

Abstract

This application relates to the field of engineering machinery technology, and provides a milling wheel with mixed teeth and a milling machine. The milling wheel includes a hub, a milling tooth holder, and milling teeth. The milling tooth holder includes a cutting tooth holder and a hob holder, both of which are distributed along the circumference of the hub surface. The milling teeth include cutting teeth and ball-tooth hobs. The cutting teeth are rotatably mounted on the cutting tooth holder, and the ball-tooth hobs are rotatably mounted on the hob holder. This application combines the advantages of both cutting tooth milling wheels and ball-tooth milling wheels by setting both cutting teeth and ball-tooth hobs on the same hub. The cutting teeth compensate for the low efficiency of ball-tooth milling wheels in crushing large stones, and the cutting tooth holder acts as a stirrer for the stones. This type of milling wheel improves milling efficiency, reduces wear on the ball-tooth hob and hob holder, and mitigates the impact on the milling wheel transmission box during crushing.

Description

Technical Field

[0001] This application relates to the field of engineering machinery technology, and in particular to a milling wheel with mixed teeth and a milling machine. Background Technology

[0002] Currently, twin-wheel trenching machines are increasingly being used in various engineering projects, becoming core equipment for diaphragm wall construction. They mainly consist of a cutter head, lifting device, sand suction port, milling wheels, milling wheel transmission box, and mud pump. The main working principle of the trenching machine is that the milling wheels are driven by the milling wheel transmission box to break rocks, and then the mud pump pumps the broken rock through the sand suction port to a sand removal machine on the ground. During construction, different types of milling wheels are selected for strata of varying hardness. Based on the type of milling teeth, there are three main types of milling wheels: standard milling wheels, cutting tooth milling wheels, and ball tooth milling wheels (hob milling wheels). Standard milling wheels are suitable for formations with a rock hardness of less than 30 MPa. They are mainly suitable for relatively low-strength working conditions such as cohesive or non-cohesive soils, sand layers, and weathered rocks. The carbide tips of standard teeth are relatively large, which can play a scraping role when milling soft formations, resulting in high efficiency. Cutting milling wheels are generally suitable for formations with a rock hardness of less than 80 MPa. They are mainly suitable for medium-hard rock formations such as sand layers and weathered rocks, but not suitable for softer formations such as soil layers. Ball-tooth milling wheels are mainly suitable for extremely hard formations with a strength greater than 80 MPa, such as moderately weathered and weakly weathered formations.

[0003] During rock crushing, ball-tooth milling wheels produce large rock fragments. If these fragments are not crushed quickly, they will cause significant impact on the milling wheel and its transmission, thus affecting the lifespan of the ball-tooth hob and the drive reducer. Current technology relies on repeated crushing of the rock by the ball-tooth hob and cutter holder to break it. This method is not only inefficient but also accelerates wear on the milling wheel, and poses a significant risk of damage to the drive reducer due to excessive impact. Utility Model Content

[0004] To address the aforementioned problems, this application provides a milling wheel with hybrid teeth and a milling machine. The milling wheel features an ingenious design and simple structure. By incorporating both cutting teeth and ball-tooth hobs on the same hub, this application combines the advantages of both cutting tooth and ball-tooth milling wheels. The cutting teeth compensate for the low efficiency of ball-tooth milling wheels in crushing large stones, reduce wear on the ball-tooth hob and hob holder, and mitigate the impact on the milling wheel transmission during crushing. The technical solution adopted in this application is as follows:

[0005] A milling wheel with mixed teeth includes a hub, a milling gear holder, and milling teeth; the milling gear holder includes a cutting tooth holder and a hob holder, both of which are distributed along the circumferential direction of the hub on the surface of the hub; the milling teeth include cutting teeth and ball-tooth hobs, the cutting teeth being rotatably mounted on the cutting tooth holder and the ball-tooth hob being rotatably mounted on the hob holder.

[0006] In some embodiments, the tips of the cutting teeth are tilted toward the direction of rotation of the hub.

[0007] In some embodiments, the height of the cutting tooth tip in the radial direction of the hub is less than the height of the ball hob in the radial direction of the hub.

[0008] In some embodiments, the tail end of the cutting tooth is provided with an annular groove; the cutting tooth seat is provided with a cutting tooth mounting hole and a pin hole communicating with the cutting tooth mounting hole, the pin hole intersecting with the cutting tooth mounting hole; the cutting tooth is inserted into the cutting tooth mounting hole, a pin is installed in the pin hole, and the cutting tooth is engaged in the cutting tooth mounting hole by the engagement of the pin with the annular groove.

[0009] In some embodiments, one of the cutting tooth mounting holes corresponds to at least two of the pin holes, and the pins in different pin holes are engaged at different positions in the annular groove.

[0010] In some embodiments, a scraper is mounted on the cutting tooth holder; along the rotation direction of the hub, the cutting teeth on the same cutting tooth holder are located in front of the scraper; the height of the scraper in the radial direction of the hub is less than the height of the ball hob in the radial direction of the hub.

[0011] In some embodiments, the scraper is made of nylon or rubber.

[0012] In some embodiments, a bushing is provided in the mounting hole of the cutting tooth, and the bushing is sleeved on the outside of the cutting tooth.

[0013] On the other hand, this application provides a milling machine, including the aforementioned milling wheel.

[0014] The milling wheel and milling machine with mixed teeth provided in this application have the following beneficial effects:

[0015] 1. This application provides a milling wheel with hybrid teeth. By setting both cutting teeth and ball-tooth hobs on the same hub, the milling wheel structure combines the advantages of both cutting tooth milling wheels and ball-tooth milling wheels. The cutting teeth compensate for the low efficiency of ball-tooth milling wheels in crushing large stones. After the ball-tooth hob crushes the rock strata into large stones, the cutting teeth continue to crush these large stones into smaller particles. Simultaneously, the larger cutting tooth holder, during the hub rotation, can promptly agitate the crushed stones and extract them via a mud pump, thereby reducing the repeated crushing of stones by the ball-tooth hob. This avoids the situation where large stones are only crushed into smaller particles through repeated compression between the ball-tooth hob and the hob holder. The cutting teeth have high crushing efficiency for large stones, ensuring the milling efficiency of the milling wheel. Furthermore, the rapid crushing of large stones into smaller particles primarily by the cutting teeth reduces the wear on the ball-tooth hob and the hob holder, and also mitigates the impact on the milling wheel transmission box during the crushing process.

[0016] 2. The milling wheel with mixed teeth provided in this application can ensure the crushing efficiency of the cutting teeth on large stones by tilting the tips of the cutting teeth toward the rotation direction of the hub, thereby ensuring the milling efficiency of the milling wheel.

[0017] 3. The milling wheel with hybrid teeth provided in this application, by making the height of the cutting tooth tip in the radial direction of the hub less than the height of the ball hob in the radial direction of the hub, in other words, by making the radius of rotation of the cutting tooth tip about the hub axis less than the maximum radius of rotation of the ball hob about the hub axis, or by making the distance from the cutting tooth tip to the hub axis less than the distance from the farthest point on the ball hob to the hub axis, allows the ball hob to pre-crush the rock layer when the hub rotates, while the cutting tooth does not participate in the pre-crushing of the rock layer. The cutting tooth mainly further crushes the large stone particles formed by the ball hob. In this way, the advantages of the ball hob and the cutting tooth can be fully utilized, and the severe wear or even premature damage of the cutting tooth due to its participation in the pre-crushing of the rock layer can be avoided.

[0018] 4. This application provides a milling wheel with mixed teeth. An annular groove is provided at the tail end of the cutting tooth, and a cutting tooth mounting hole and a pin hole are provided on the cutting tooth holder. The cutting tooth is inserted into the cutting tooth mounting hole, and the cutting tooth is secured in the mounting hole by the engagement of the pin in the pin hole with the annular groove. This prevents the cutting tooth from falling out of the mounting hole while also not affecting its rotation within the mounting hole. This method of fixing the cutting tooth is simple and reliable, and also facilitates the disassembly and replacement of the cutting tooth.

[0019] 5. The milling wheel with mixed teeth provided in this application ensures the reliability of fixing the cutting tooth by configuring at least two pin holes for a cutting tooth mounting hole, and the pins in different pin holes are engaged at different positions of the annular groove of the cutting tooth, which greatly reduces the risk of the cutting tooth coming out of the cutting tooth mounting hole.

[0020] 6. The milling wheel with mixed teeth provided in this application has a scraper set on the cutting tooth seat and the scraper is located behind the cutting tooth. After the cutting tooth crushes large stone particles, the scraper quickly stirs up the crushed stones and finally pumps them out by the mud pump, which reduces the repeated crushing of stones and ensures the milling efficiency of the milling wheel.

[0021] 7. The milling wheel with mixed teeth provided in this application, by setting a bushing, can reduce wear on the cutting tooth mounting hole, avoid stress concentration in the cutting tooth mounting hole, reduce the risk of uneven force on the cutting tooth mounting hole, and extend the service life of the cutting tooth holder. In addition, the presence of the bushing reduces the friction force on the cutting tooth when rotating in the cutting tooth mounting hole, and improves the flexibility of the cutting tooth rotation. Attached Figure Description

[0022] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of a milling wheel with mixed teeth and a milling machine:

[0023] Figure 1 This is a schematic diagram of the overall structure of the milling wheel in this application;

[0024] Figure 2 These are a schematic diagram and a cross-sectional view of an embodiment of the cutting tooth holder;

[0025] Figure 3 This is a schematic diagram of the structure of one embodiment of the cutting tooth;

[0026] Figure 4 It shows a schematic diagram and a partial cross-sectional view of the assembled cutting teeth and cutting tooth holder.

[0027] Explanation of icon numbers:

[0028] 1. Hub, 2. Hob holder, 3. Ball tooth hob, 4. Cutting tooth holder, 401. Cutting tooth holder body, 402. Cutting tooth mounting hole, 403. Cutting tooth mounting hole, 404. Pin hole, 405. Cutting tooth, 5. Alloy head, 501. Cutting tooth body, 502. Cutting tooth shank, 503. Annular groove, 504. Scraper, 6. Bushing, 7. Pin shaft. Detailed Implementation

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0030] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0031] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] refer to Figures 1-4 This application provides a milling wheel with mixed teeth, including a hub 1, a milling gear holder and milling teeth; the milling gear holder includes a cutting tooth holder 4 and a hob holder 2, both of which are distributed on the surface of the hub 1 along the circumferential direction; the milling teeth include a cutting tooth 5 and a ball tooth hob 3, the cutting tooth 5 being rotatably mounted on the cutting tooth holder 4 and the ball tooth hob 3 being rotatably mounted on the hob holder 2.

[0035] Understandably, by setting both the cutting tooth 5 and the ball-tooth hob 3 on the same hub 1, the milling wheel structure combines the advantages of both cutting tooth milling wheels and ball-tooth milling wheels. The cutting tooth 5 compensates for the low efficiency of ball-tooth milling wheels in crushing large stones. After the ball-tooth hob 3 crushes the rock layer into large stones, the cutting tooth 5 continues to crush these large stones into smaller ones. Simultaneously, the larger cutting tooth seat 4, during the rotation of the hub 1, can promptly agitate the crushed stones and extract them via a mud pump, thus reducing the repeated crushing of stones by the ball-tooth hob 3. This avoids the situation where large stones are repeatedly crushed into smaller particles only through repeated compression between the ball-tooth hob 3 and the hob seat 2. The cutting tooth 5 has high crushing efficiency for large stones, ensuring the milling efficiency of the milling wheel. Furthermore, the rapid crushing of large stones into smaller particles primarily by the cutting tooth 5 reduces the wear on the ball-tooth hob 3 and the hob seat 2, and also mitigates the impact on the milling wheel transmission box during the crushing process.

[0036] refer to Figure 1 In one embodiment, the tip of the cutting tooth 5 is tilted toward the rotation direction of the hub 1. By tilting the tip of the cutting tooth 5 toward the rotation direction of the hub 1, the crushing efficiency of the cutting tooth 5 for large stones can be ensured, thereby ensuring the milling efficiency of the milling wheel.

[0037] In one embodiment, the height of the tip of the cutting tooth 5 in the radial direction of the hub 1 is less than the height of the ball hob 3 in the radial direction of the hub 1.

[0038] It is worth noting that by making the height of the tip of the cutting tooth 5 in the radial direction of the hub 1 less than the height of the ball hob 3 in the radial direction of the hub 1, in other words, by making the radius of rotation of the tip of the cutting tooth 5 about the axis of the hub 1 less than the maximum radius of rotation of the ball hob 3 about the axis of the hub 1, or by making the distance from the tip of the cutting tooth 5 to the axis of the hub 1 less than the distance from the farthest point on the ball hob 3 to the axis of the hub 1, the ball hob 3 can pre-crush the rock layer when the hub 1 rotates, while the cutting tooth 5 does not participate in the pre-crushing of the rock layer. The cutting tooth 5 mainly further crushes the large stone particles formed by the ball hob 3. In this way, the advantages of the ball hob 3 and the cutting tooth 5 can be fully utilized, and the cutting tooth 5 can avoid serious wear or even premature damage due to its participation in the pre-crushing of the rock layer.

[0039] refer to Figures 2-4 In one embodiment, the tail end of the cutting tooth 5 is provided with an annular groove 504; the cutting tooth seat 4 is provided with a cutting tooth mounting hole and a pin hole 405 communicating with the cutting tooth mounting hole, the pin hole 405 intersecting with the cutting tooth mounting hole; the cutting tooth 5 is inserted into the cutting tooth mounting hole, and a pin 8 is installed in the pin hole 405, the cutting tooth is engaged in the cutting tooth mounting hole by the engagement of the pin 8 with the annular groove 504.

[0040] Specifically, the axis of the cutting tooth mounting hole and the axis of the pin hole 405 can be coplanar or non-coplanar. Preferably, the axis of the cutting tooth mounting hole and the axis of the pin hole 405 are perpendicular to each other and not coplanar. (Reference) Figure 3 A specific embodiment of the cutting tooth 5 includes an alloy head 501, a cutting tooth body 502, and a cutting tooth shank 503. The cutting tooth body 502 is located between the alloy head 501 and the cutting tooth shank 503, and the tail of the cutting tooth shank 503 is provided with an annular groove 504. (Reference) Figure 2 , Figure 4 A specific embodiment of the cutting tooth holder 4 includes a cutting tooth holder body 401, on which three cutting tooth mounting holes are provided, namely cutting tooth mounting hole 402, cutting tooth mounting hole 403, and cutting tooth mounting hole 404. The three cutting tooth mounting holes are arranged in a row.

[0041] It is easy to understand that by providing an annular groove 504 at the tail end of the cutting tooth 5, and providing a cutting tooth mounting hole and a pin hole 405 on the cutting tooth base 4, the cutting tooth 5 is inserted into the cutting tooth mounting hole, and the cutting tooth 5 is secured in the cutting tooth mounting hole by the engagement of the pin 8 in the pin hole 405 with the annular groove 504. This prevents the cutting tooth 5 from coming out of the cutting tooth mounting hole, and also does not affect the free rotation of the cutting tooth 5 in the cutting tooth mounting hole. This method of fixing the cutting tooth 5 is simple and reliable, and also facilitates the disassembly and replacement of the cutting tooth 5.

[0042] refer to Figure 2 , Figure 4 In one embodiment, a cutting tooth mounting hole corresponds to at least two pin holes 405, and the pins 8 in different pin holes 405 are engaged at different positions in the annular groove 504.

[0043] It is easy to understand that by configuring at least two pin holes 405 for a cutting tooth mounting hole, and having the pins 8 in different pin holes 405 engage at different positions in the annular groove 504 of the cutting tooth 5, the reliability of fixing the cutting tooth 5 is ensured, and the risk of the cutting tooth 5 coming out of the cutting tooth mounting hole is greatly reduced.

[0044] refer to Figure 1 In one embodiment, a scraper 6 is mounted on the cutting tooth holder 4; along the rotation direction of the hub 1, the cutting teeth 5 on the same cutting tooth holder 4 are located in front of the scraper 6; the height of the scraper 6 in the radial direction of the hub 1 is less than the height of the ball hob 3 in the radial direction of the hub 1. By setting the scraper 6 on the cutting tooth holder 4, and with the scraper 6 located behind the cutting teeth 5, after the cutting teeth 5 crush large stone particles, the scraper 6 immediately stirs up the crushed stones and finally pumps them out by the mud pump, reducing the time the stones stay near the milling wheel, reducing the repeated crushing of stones, and ensuring the milling efficiency of the milling wheel.

[0045] It is important to note that by making the height of the scraper 6 in the radial direction of the hub 1 less than the height of the ball hob 3 in the radial direction of the hub 1, in other words, by making the radius of rotation of the scraper 6 about the axis of the hub 1 less than the maximum radius of rotation of the ball hob 3 about the axis of the hub 1, or by making the distance from the point on the scraper 6 furthest from the axis of the hub 1 less than the distance from the point on the ball hob 3 furthest from the axis of the hub 1, severe wear or even premature damage to the scraper 6 can be avoided.

[0046] In one embodiment, the scraper 6 is made of nylon or rubber. Both nylon and rubber have good elastic deformation capabilities, high strength, durability, and are not easily worn, making them suitable for complex geological environments. It is understood that the scraper 6 can also be made of other materials with good elastic deformation capabilities, high strength, and wear resistance.

[0047] refer to Figure 4 In one embodiment, a bushing 7 is provided in the cutting tooth mounting hole, and the bushing 7 is fitted over the cutting tooth. By providing the bushing 7, wear on the cutting tooth mounting hole can be reduced, stress concentration in the cutting tooth mounting hole can be avoided, the risk of uneven force distribution in the cutting tooth mounting hole can be reduced, and the service life of the cutting tooth holder 4 can be extended. In addition, the presence of the bushing 7 reduces the frictional force experienced by the cutting tooth 5 when rotating in the cutting tooth mounting hole, and improves the flexibility of the cutting tooth rotation.

[0048] On the other hand, this application provides a grooving machine, including the aforementioned milling wheel. The specific structure of the milling wheel is as described in the foregoing embodiments. Since this grooving machine adopts the technical solutions of the foregoing embodiments, it at least has the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be elaborated further here. Preferably, the grooving machine is a two-wheel grooving machine.

[0049] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A milling wheel with mixed teeth, characterized in that, Includes wheel hub, milling gear holder, and milling gear; The milling gear holder includes a cutting gear holder and a hob holder, both of which are distributed on the surface of the hub along the circumferential direction of the hub. The milling cutter includes a cutting tooth and a ball hob, the cutting tooth being rotatably mounted on the cutting tooth holder and the ball hob being rotatably mounted on the hob holder.

2. A milling wheel with mixed teeth according to claim 1, characterized in that, The tips of the cutting teeth are inclined toward the direction of rotation of the hub.

3. A milling wheel with mixed teeth according to claim 2, characterized in that, The height of the cutting tooth tip in the radial direction of the hub is less than the height of the ball hob in the radial direction of the hub.

4. A milling wheel with mixed teeth according to any one of claims 1-3, characterized in that, The tail end of the cutting tooth is provided with an annular groove; the cutting tooth seat is provided with a cutting tooth mounting hole and a pin hole communicating with the cutting tooth mounting hole, the pin hole intersecting with the cutting tooth mounting hole; the cutting tooth is inserted into the cutting tooth mounting hole, a pin is installed in the pin hole, and the cutting tooth is engaged in the cutting tooth mounting hole by the engagement of the pin and the annular groove.

5. A milling wheel with mixed teeth according to claim 4, characterized in that, One of the cutting tooth mounting holes corresponds to at least two of the pin holes, and the pins in different pin holes are engaged at different positions in the annular groove.

6. A milling wheel with mixed teeth according to any one of claims 1-3 and 5, characterized in that, A scraper is mounted on the cutting tooth holder; along the rotation direction of the hub, the cutting teeth on the same cutting tooth holder are located in front of the scraper; the height of the scraper in the radial direction of the hub is less than the height of the ball hob in the radial direction of the hub.

7. A milling wheel with mixed teeth according to claim 6, characterized in that, The scraper is made of nylon or rubber.

8. A milling wheel with mixed teeth according to claim 4, characterized in that, A bushing is provided in the mounting hole of the cutting tooth, and the bushing is sleeved on the outside of the cutting tooth.

9. A milling machine, characterized in that, Includes the milling wheel as described in any one of claims 1-8.

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