A pitching structure of a bucket wheel stacker-reclaimer with independent slewing adjustment

Abstract

The present invention discloses a luffing structure of a bucket wheel machine with independent slewing adjustment, which relates to the technical field of conveying equipment and includes a moving structure. A slewing structure is arranged on the moving structure, and a vehicle body structure and a luffing structure are installed on the slewing structure; the slewing structure includes an outer slewing support part, and the outer slewing support part is arranged on the moving structure and connected to the vehicle body structure; an installation part is arranged inside the outer slewing support part, the installation part is connected to the moving structure and an inner slewing support part is arranged inside it. The inner slewing support part can be adjusted in height and its top end extends outside the outer slewing support part and is connected to the luffing structure; a limiting part is arranged at the position of the inner slewing support part, and the limiting part is connected to the moving structure; a sealing part is also connected to the top end of the inner slewing support part, and the sealing part can be telescopically adjusted and is rotationally connected to the outer slewing support part. The present invention improves the unloading efficiency and quality of the bucket wheel machine, and can prevent dust, impurities, etc. from entering the inside of the slewing structure, ensuring the safety and stability of operation.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying equipment, and more particularly, to a pitching structure of a bucket wheel machine with independent slewing adjustment. Background Art

[0002] In the field of bulk material handling operations, the bucket wheel machine, as a key equipment, is widely used in places such as ports, power plants, and mines. In the structural design of traditional bucket wheel machines, the pitching structure (cantilever) and the vehicle body rotation action are unified, that is, the rotation of the pitching structure and the rotation of the vehicle body are coordinated through the same slewing structure. This design simplifies the mechanical structure and control system of the equipment to a certain extent. However, in the actual use process, this design exposes problems that affect the discharging effect.

[0003] When facing complex discharging working conditions, such as different material characteristics, irregular stockpile shapes, and space limitations of the discharging site, etc., the unified rotation action makes it difficult for the bucket wheel machine to flexibly adjust the discharging posture. Due to the inability of the pitching structure and the vehicle body to operate independently, the operator cannot accurately control the rotation angle and speed of the pitching structure relative to the vehicle body, resulting in the material not being accurately discharged to the designated position, low discharging efficiency, reduced discharging quality, increased workload of subsequent material sorting, and thus affecting the efficiency and stability of the entire bulk material handling operation process. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems raised in the above background art, and then propose a pitching structure of a bucket wheel machine with independent slewing adjustment.

[0005] The technical solution adopted by the present invention to solve its technical problems is:

[0006] A pitching structure of a bucket wheel machine with independent slewing adjustment, including a moving structure, a slewing structure is arranged on the moving structure, and a vehicle body structure and a pitching structure are installed on the slewing structure; the slewing structure includes an outer slewing support part, the outer slewing support part is arranged on the moving structure and is connected to the vehicle body structure, so that the vehicle body structure can be independently slewed and adjusted; an installation part is arranged inside the outer slewing support part, the installation part is connected to the moving structure and an inner slewing support part is arranged inside it, the inner slewing support part can be adjusted in height and its top end extends outside the outer slewing support part and is connected to the pitching structure, so that the pitching structure can be independently slewed and adjusted and adjusted in height; a limiting part is arranged at the position of the inner slewing support part, the limiting part is connected to the moving structure and limits the height adjustment of the inner slewing support part; a sealing part is also connected to the top end of the inner slewing support part, the sealing part can be telescopically adjusted and is rotationally connected to the outer slewing support part to form a seal between the outer slewing support part and the inner slewing support part.

[0007] Furthermore, in the above solution, the outer slewing support portion includes an outer support shell, which is arranged on the mobile structure and has an outer slewing support mounted thereon, and an outer slewing seat connected to the vehicle body structure is mounted on the outer slewing support.

[0008] Furthermore, in the above solution, the mounting portion includes a rib plate seat, which is arranged inside the outer supporting shell and connected to the movable structure. A mounting shell is provided on the rib plate seat, and the top end of the mounting shell extends to the inside of the outer rotating seat.

[0009] The above scheme goes further, and the inner slewing support part includes a telescopic cylinder, which is arranged inside the mounting shell and connected to the rib plate seat, and the telescopic end of the telescopic cylinder is connected to the inner support shell, the outer wall of the inner support shell contacts and slides with the inner wall of the mounting shell, and an inner slewing support is installed on the inner support shell, and an inner slewing seat is installed on the inner slewing support, the inner slewing seat extends to the outside of the outer slewing seat and is installed with a fixed seat connected to the pitch structure, and the fixed seat is located above the outer slewing seat.

[0010] The above scheme goes further, and the limiting part includes a fixed shell, which is arranged inside the inner supporting shell and outside the telescopic cylinder, and is connected to the movable structure. The sliding sleeve on the fixed shell is provided with a movable ring, and the movable ring and the fixed shell are connected by several groups of circumferentially arranged buffer springs, and the movable ring cooperates with the bottom end surface of the inner supporting shell so that when the inner supporting shell moves up to a certain height, the bottom end surface of the inner supporting shell can contact the movable ring.

[0011] Furthermore, the above solution further comprises a pressure sensor, which is arranged on the bottom end surface of the inner support shell so that when the inner support shell moves up to a certain height, the pressure sensor can contact the movable ring, and when the pressure sensor value reaches a set value, the telescopic cylinder stops the upward movement.

[0012] Furthermore, the sealing portion includes a slide groove, which is annularly arranged on the outer rotary seat, and a ring seat is slidably fitted in the slide groove, a telescopic sleeve is installed on the ring seat, and the telescopic sleeve is arranged outside the fixed seat and connected to the fixed seat.

[0013] Furthermore, in the above solution, a support portion connected to the movable structure is provided inside the outer support shell, and the support portion is floating and is provided in cooperation with the mounting shell.

[0014] The above scheme goes further, the supporting part includes a connecting shell, which is arranged inside the outer supporting shell and connected to the movable structure, and is covered on the outside of the rib plate seat. A plurality of guide rods distributed in a circle are slidably arranged on the connecting shell, and a limited seat is provided on each guide rod. The top ends of the plurality of guide rods are commonly connected to a resistance ring, which is slidably sleeved on the outside of the mounting shell, and the resistance ring and the connecting shell are connected by a plurality of support springs arranged in a circle. A fixed ring is provided above the resistance ring, and the fixed ring is fixedly sleeved on the outside of the mounting shell and is cooperated with the resistance ring.

[0015] Furthermore, in the above solution, polyurethane material is filled between the connecting shell and the rib plate seat to form an elastic buffer layer.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] When facing complex unloading conditions, the present invention can independently rotate the vehicle body structure and the pitch structure and adjust the height of the pitch structure. The operator can accurately control the rotation angle and speed of the pitch structure relative to the vehicle body structure according to the material characteristics, the shape of the material pile and the site space, and accurately unload the material to the specified position, thereby improving the unloading efficiency and quality, reducing the scattering and uneven accumulation of materials, and reducing the subsequent sorting workload. It can cope with unloading conditions such as various materials, irregular material piles and space-constrained sites, and protect the internal components of the rotating structure, and can prevent dust, impurities, etc. from entering the rotating structure, reducing component wear, reducing the probability of failure, extending service life and maintenance costs, and ensuring safe and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a structural diagram of the rotary structure;

[0020] Figure 3 for Figure 2 A partial enlarged schematic diagram;

[0021] Figure 4 This is a schematic diagram of the installation position of the pressure sensor;

[0022] Figure 5 Schematic diagram of the structure of the support part;

[0023] Figure 6 for Figure 5 A partial enlarged schematic diagram of B in the middle;

[0024] Figure 7 This is a schematic diagram of the installation position of the polyurethane material;

[0025] Wherein: 1. Moving structure; 2. Rotary structure; 21. Outer rotary support part; 211. Outer support shell; 212. Outer rotary bearing; 213. Outer rotary seat; 22. Mounting part; 221. Ribbed seat; 222. Mounting shell; 23. Inner rotary support part; 231. Telescopic cylinder; 232. Inner support shell; 233. Inner rotary bearing; 234. Inner rotary seat; 235. Fixed seat; 236. Pressure sensor; 24. Limiting part; 241. Fixed shell; 242. Movable ring; 243. Buffer spring; 25. Sealing part; 251. Chute; 252. Ring seat; 253. Telescopic sleeve; 26. Support part; 261. Connecting shell; 262. Guide rod; 263. Limiting seat; 264. Contact ring; 265. Support spring; 266. Fixed ring; 27. Polyurethane material; 3. Vehicle body structure; 4. Pitching structure. Detailed implementation manners

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. The present invention will be further described in conjunction with the accompanying drawings and embodiments:

[0027] A pitching structure 4 of a bucket wheel machine with independent rotary adjustment, referring to the attached Figure 1 and the attached Figure 2 As shown, it includes a moving structure 1. A rotary structure 2 is arranged on the moving structure 1, and a vehicle body structure 3 and a pitching structure 4 are installed on the rotary structure 2. Among them, the rotary structure 2 includes an outer rotary support part 21. The outer rotary support part 21 is arranged on the moving structure 1 and connected to the vehicle body structure 3, so that the vehicle body structure 3 can be independently rotated and adjusted, enabling the vehicle body structure 3 to rotate and adjust around the axis of the outer rotary support part 21 without being affected by the pitching structure 4. An installation part 22 is arranged inside the outer rotary support part 21. The installation part 22 is connected to the moving structure 1 and an inner rotary support part 23 is arranged inside it. The inner rotary support part 23 can be adjusted in height and its top extends to the outside of the outer rotary support part 26 and is connected to the pitching structure 4, so that the pitching structure 4 can be independently rotated and adjusted in height, realizing the independent rotation of the pitching structure 4 around its own axis and changing its working position through height adjustment to achieve flexible attitude adjustment. A limiting part 24 is arranged at the position of the inner rotary support part 23. The limiting part 24 is connected to the moving structure 1 and limits the height adjustment of the inner rotary support part 23 to ensure safety. A sealing part 25 is also connected to the top of the inner rotary support part 23. The sealing part 25 can be telescopically adjusted and is rotatably connected to the outer rotary support part 21 to form a seal between the outer rotary support part 21 and the inner rotary support part 23, preventing dust and materials from entering the inside of the rotary structure 2 and affecting the normal operation of the equipment.

[0028] In the specific implementation process of the present invention, the moving structure 1 moves the entire bucket wheel stacker-reclaimer to the unloading operation area to determine the initial position for subsequent operations; subsequently, the outer slewing bearing part 21 starts to work. Since it is connected to the moving structure 1 and supports the vehicle body structure 3, by driving the outer slewing bearing part 21, the vehicle body structure 3 can perform independent slewing adjustment around its axis, enabling the vehicle body structure 3 to adjust its direction according to factors such as the layout of the unloading site and the position of the stockpile, preparing for subsequent precise unloading; then, it enters the working preparation state to prepare for the adjustment of the pitching structure 4; during this process, the inner slewing bearing part 23 performs the height adjustment operation, achieving height change through its own lifting function. Its top is connected to the pitching structure 4, thereby driving the pitching structure 4 to rise or fall. During this process, the limiting part 24 plays a role. It is connected to the moving structure 1 and constantly monitors and limits the height adjustment range of the inner slewing bearing part 23 to ensure adjustment within a safe height and avoid equipment damage or safety accidents caused by excessive adjustment; after completing the height adjustment, the inner slewing bearing part 23 continues to work, driving the pitching structure 4 to perform independent slewing adjustment around its own axis. The operator can accurately control the rotation angle and speed of the pitching structure 4 relative to the vehicle body according to actual situations such as material characteristics and stockpile shape, thereby adjusting the unloading posture; during the entire working process, the sealing part 25 continuously plays a role. Since it is connected to the top of the inner slewing bearing part 23, it can perform telescopic adjustment according to the height adjustment and slewing adjustment of the inner slewing bearing part 23, and at the same time maintains a rotational connection with the outer slewing bearing part 21, thus forming an effective seal between the outer slewing bearing part 21 and the inner slewing bearing part 23 to prevent impurities such as dust and materials generated during the unloading process from entering the inside of the slewing structure 2 and protecting the internal components from wear.

[0029] For the above solution, specifically, referring to the attached Figure 2 As shown, the outer slewing bearing part 21 includes an outer support shell 211. The outer support shell 211 is arranged on the moving structure 1, and an outer slewing bearing 212 is installed thereon. An outer slewing seat 213 connected to the vehicle body structure 3 is installed on the outer slewing bearing 212.

[0030] In the solution, the outer support shell 211 is arranged on the moving structure 1, which plays a role in carrying and fixing the outer slewing bearing 212, providing a stable basic support for the entire slewing structure 2, enabling it to withstand various forces and torques generated by the vehicle body structure 3 and the entire bucket wheel stacker-reclaimer during operation; the outer slewing bearing 212 is the key component for realizing the independent slewing of the vehicle body structure 3, enabling the outer slewing seat 213 installed thereon to rotate around a specific axis, and then transmitting the slewing motion of the outer slewing bearing 212 to the vehicle body structure 3, enabling the vehicle body structure 3 to rotate with the rotation of the outer slewing bearing 212.

[0031] For the above solution, specifically, refer to the attached Figure 2 As shown, the mounting portion 22 includes a rib plate seat 221 , which is disposed inside the outer support shell 211 and connected to the mobile structure 1 . A mounting shell 222 is disposed on the rib plate seat 221 , and the top end of the mounting shell 222 extends to the inside of the outer rotary seat 213 .

[0032] In the scheme, the rib seat 221 plays a dual role. On the one hand, the rib seat 221 is connected to the mobile structure 1, transferring the weight of the mounting shell 222 and the components thereon to the mobile structure 1, providing stable support for the entire structure; on the other hand, it is located inside the outer support shell 211, and together with the outer support shell 211 constitutes a part of the rotating structure 2, which plays a role in strengthening the stability of the structure, ensuring that it can withstand various forces without deformation during the operation of the bucket wheel excavator; and the mounting shell 222 provides an installation space and positioning reference for components such as the inner rotating support part 23. The inner rotating support part 23 is installed in the mounting shell 222, which can ensure the accuracy and stability of its position, thereby ensuring the precise realization of the rotation and height adjustment functions of the pitch structure 4; at the same time, the mounting shell 222 extends to the inside of the outer rotating seat 213, so that the connection between the inner rotating support part 23 and the outer rotating support part 21 is more compact, which is conducive to the transmission of force and the coordinated work of the structure, so that the entire rotating structure 2 can better adapt to complex operating conditions.

[0033] For the above solution, specifically, refer to the attached Figure 2 As shown, the inner rotary support portion 23 includes a telescopic cylinder 231, which is arranged inside the mounting shell 222 and connected to the rib plate seat 221, and the telescopic end of the telescopic cylinder 231 is connected to the inner support shell 232, the outer wall of the inner support shell 232 contacts and slides with the inner wall of the mounting shell 222, and an inner rotary support 233 is installed on the inner support shell 232, and an inner rotary seat 234 is installed on the inner rotary support 233. The inner rotary seat 234 extends to the outside of the outer rotary seat 213 and is installed with a fixed seat 235 connected to the pitch structure 4, and the fixed seat 235 is located above the outer rotary seat 213.

[0034] In the scheme, when the telescopic end of the telescopic cylinder 231 performs telescopic movement, it will drive the inner support shell 232 connected thereto to move up and down. By controlling the telescopic amount of the telescopic cylinder 231, the height of the inner support shell 232 and the pitch structure 4 associated therewith can be accurately adjusted, thereby achieving a change in the pitch angle to adapt to different unloading conditions; since the outer wall of the inner support shell 232 contacts and slides with the inner wall of the mounting shell 222, this design provides a guide for the up and down movement of the inner support shell 232, ensuring that it can move smoothly along the inner wall of the mounting shell 222 during the height adjustment process. The inner slewing support 233 can slide and withstand various forces generated by the inner slewing support part 23 and the pitching structure 4 during operation. At the same time, it provides an installation foundation and stable support for the inner slewing support 233 to ensure that the inner slewing support 233 can work normally. The inner slewing support 233 can make the inner slewing seat 234 rotate around a specific axis, thereby driving the pitching structure 4 connected to the fixed seat 235 to rotate independently around the axis of the inner slewing support 233. In this way, the pitching structure 4 can realize flexible rotation adjustment at different heights to meet the requirements of the bucket wheel excavator for different unloading postures during the unloading process.

[0035] For the above solution, specifically, refer to the attached Figure 2 and attached Figure 3 As shown, the limiting portion 24 includes a fixed shell 241, which is arranged inside the inner supporting shell 232 and outside the telescopic cylinder 231, and is connected to the movable structure 1. A movable ring 242 is provided on the sliding sleeve of the fixed shell 241, and the movable ring 242 and the fixed shell 241 are connected by several groups of circumferentially arranged buffer springs 243, and the movable ring 242 cooperates with the bottom end surface of the inner supporting shell 232 so that when the inner supporting shell 232 moves up to a certain height, the bottom end surface of the inner supporting shell 232 can contact the movable ring 242.

[0036] In the scheme, the fixed shell 241 fixes the limiting part 24 as a whole on the movable structure 1 to ensure its stability. On the other hand, it provides installation space for components such as the movable ring 242, so that the movable ring 242 can slide on the fixed shell 241, and at the same time, it also limits components such as the buffer spring 243 within a certain space, thereby ensuring the compactness and reliability of the structure of the limiting part 24; when the inner support shell 232 moves up to a certain height as the telescopic cylinder 231 is extended and retracted, the bottom end surface of the inner support shell 232 will contact the movable ring 242. At this time, the movable ring 242 prevents the inner support shell 232 from continuing to move up, thereby realizing the limiting function of the height adjustment of the inner slewing bearing part 23, ensuring that the inner support shell 232 and the pitch structure 4 connected thereto will not exceed the safe height range; at the same time, during the upward movement of the movable ring 242, the buffer spring 243 will be compressed, which plays a role in buffering the impact force, avoiding rigid collision between the inner support shell 232 and the movable ring 242, thereby protecting the components from damage.

[0037] For the above solution, specifically, referring to the attached Figure 4 As shown, the inner slewing bearing part 23 further includes a pressure sensor 236, and the pressure sensor 236 is arranged on the bottom end face of the inner support shell 232, so that when the inner support shell 232 moves up to a certain height, the pressure sensor 236 can contact the movable ring 242, and when the value of the pressure sensor 236 reaches the set value, the telescopic cylinder 231 stops moving up.

[0038] In the solution, the pressure sensor 236 monitors the pressure change between the inner support shell 232 and the movable ring 242 in real time. When the inner support shell 232 moves upward under the action of the telescopic cylinder 231, the pressure sensor 236 rises accordingly. When the inner support shell 232 moves up to a certain height and the pressure sensor 236 contacts the movable ring 242, the pressure sensor 236 starts to detect the pressure and converts the pressure signal into an electrical signal. As the inner support shell 232 continues to move up, the pressure gradually increases. When the value detected by the pressure sensor 236 reaches the set value, it indicates that the inner support shell 232 has risen to the specified limit height. At this time, the telescopic cylinder 231 stops moving up to avoid damage to the equipment or safety accidents caused by excessive rising of the inner support shell 232, realizing precise limit control of the height adjustment of the inner slewing bearing part 23.

[0039] For the above solution, specifically, referring to the attached Figure 3 As shown, the sealing part 25 includes a chute 251. The chute 251 is annularly arranged on the outer slewing base 213, and a ring seat 252 is slidably fitted in the chute 251. A telescopic sleeve 253 is installed on the ring seat 252. The telescopic sleeve 253 is sleeved outside the fixed seat 235 and is connected to the fixed seat 235.

[0040] In the solution, the ring seat 252 is slidably fitted with the chute 251, so that the ring seat 252 can flexibly rotate around the axis of the fixed seat 235 on the outer slewing base 213. The telescopic sleeve 253 installed on the ring seat 252 is sleeved outside the fixed seat 235 and is connected to the fixed seat 235. Due to the telescopic characteristic of the telescopic sleeve 253, it can perform corresponding telescoping and rotation along with the height change and slewing motion of the inner slewing base 234 and the fixed seat 235. On the one hand, it effectively seals the space between the inner slewing base 234 and the outer slewing base 213 to prevent dust, sundries, etc. from entering the inside of the slewing structure 2 and affecting the normal operation of the equipment. On the other hand, it can adapt to the movement of the fixed seat 235 at different heights and angles, ensuring the sealing effect while not restricting the normal actions of the fixed seat 235 and the inner slewing base 234.

[0041] For the above solution, during the loading process of the pitching structure 4, the components connected to it will bear a large axial load. From this perspective, therefore, referring to the attached Figure 5 and the attachedFigure 6 As shown, a support part 26 connected to the moving structure 1 is arranged inside the outer support shell 211. The support part 26 is of a floating type and is arranged in cooperation with the mounting shell 222. Specifically, the support part 26 includes a connecting shell 261. The connecting shell 261 is arranged inside the outer support shell 211 and is connected to the moving structure 1, and covers the outside of the rib plate seat 221. A number of guide rods 262 distributed in a circular pattern are slidably arranged on the connecting shell 261, and a limit seat 263 is arranged on each guide rod 262. The tops of the several guide rods 262 are jointly connected to a contact ring 264. The contact ring 264 is slidably sleeved outside the mounting shell 222, and the contact ring 264 and the connecting shell 261 are connected by a number of support springs 265 arranged in a circular pattern. Above the contact ring 264, there is a fixed ring 266. The fixed ring 266 is fixedly sleeved outside the mounting shell 222 and is arranged in cooperation with the contact ring 264.

[0042] In the solution, the connecting shell 261 provides a solid and reliable foundation for subsequent coping with various loads. When the pitching structure 4 encounters a large axial load during the loading process (such as the additional axial force caused by the inclination of the pitching structure 4), the fixed ring 266 takes the lead in making a reaction. Since the fixed ring 266 is fixedly sleeved with the mounting shell 222, and the mounting shell 222 is closely related to the inner support shell 232, the axial force from the pitching structure 4 can be quickly transmitted to the fixed ring 266. After receiving this force, the fixed ring 266 immediately transmits it to the contact ring 264 that cooperates with it below, thus clearly planning the transmission path of the axial force inside the structure. A number of support springs 265 are evenly distributed between the contact ring 264 and the connecting shell 261. Once the contact ring 264 bears the axial force transmitted from the fixed ring 266, it will compress these support springs 265. During the compression process of the support springs 265, a reverse force will be generated according to their own elastic characteristics, which can effectively offset part of the axial load, greatly reducing the impact force borne by the structure and avoiding component damage caused by the instantaneous strong axial force. And because the contact ring 264 is not fixed, under the continuous action of the axial force, the contact ring 264 can adaptively adjust its position according to the actual force situation. No matter how the magnitude and direction of the axial force change, the contact ring 264 can always maintain close cooperation with the fixed ring 266 through position adjustment, continuously providing stable and effective auxiliary support for the fixed ring 266 and a series of components connected to it. This ensures that when key components such as the inner support shell 232 and the mounting shell 222 bear axial loads, the displacement is strictly controlled within a safe range, fundamentally guaranteeing the stability and safety of the entire structure, and enabling the bucket wheel stacker-reclaimer to operate stably under complex loading conditions.

[0043] For the above solution, referring to the attached Figure 7 As shown, a polyurethane material 27 is filled between the connecting shell 261 and the rib plate seat 221 to form an elastic buffer layer.

[0044] In the solution, the energy generated by the operation of the bucket wheel reclaimer is transmitted to the rib seat 221 through the connecting shell 261, and at this time, the polyurethane material 27 can absorb and disperse these vibration and impact energies. When vibration waves are transmitted from the connecting shell 261, the polyurethane molecular chains rub against and deform each other, converting mechanical energy into heat energy and dissipating it, thereby reducing the transmission of vibration to the rib seat 221 and reducing the risk of fatigue damage to the rib seat 221 caused by vibration. At the same time, the polyurethane material 27 not only increases the integrity of the structure, but also improves the wrapping and fixing effect of the connecting shell 261 on the rib seat 221 to a certain extent, so that when the rib seat 221 is subjected to an external force, it can be more stably connected to the moving structure 1 through the connecting shell 261, enhancing the stability of the entire support part 26 under complex force conditions.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A bucket wheel excavator pitch structure with independent slewing adjustment, comprising a mobile structure (1), a slewing structure (2) provided on the mobile structure (1), and a vehicle body structure (3) and a pitch structure (4) mounted on the slewing structure (2); characterized in that: The slewing structure (2) includes an outer slewing support portion (21), which is arranged on the mobile structure (1) and connected to the vehicle body structure (3) so that the vehicle body structure (3) can be independently slewed and adjusted; The outer slewing support portion (21) is provided with a mounting portion (22), the mounting portion (22) is connected to the mobile structure (1) and is provided with an inner slewing support portion (23) therein, the inner slewing support portion (23) is height-adjustable and its top end extends to the outside of the outer slewing support portion (26) and is connected to the pitch structure (4), so that the pitch structure (4) can be independently slew-adjusted and height-adjusted; A limiting portion (24) is provided at the position of the inner slewing support portion (23), the limiting portion (24) is connected to the moving structure (1) and limits the height adjustment of the inner slewing support portion (23); The top end of the inner slewing support portion (23) is further connected to a sealing portion (25), which is capable of telescopic adjustment and is rotatably connected to the outer slewing support portion (21) to form a seal between the outer slewing support portion (21) and the inner slewing support portion (23); The outer slewing support portion (21) includes an outer support shell (211), the outer support shell (211) is arranged on the mobile structure (1), and an outer slewing support (212) is installed on the outer slewing support (212), and an outer slewing seat (213) connected to the vehicle body structure (3) is installed on the outer slewing support (212); The mounting portion (22) includes a rib plate seat (221), the rib plate seat (221) is arranged inside the outer support shell (211) and connected to the movable structure (1), a mounting shell (222) is arranged on the rib plate seat (221), and the top end of the mounting shell (222) extends to the inside of the outer rotary seat (213); The inner slewing support portion (23) includes a telescopic cylinder (231), which is arranged inside the mounting shell (222) and connected to the rib plate seat (221), and the telescopic end of the telescopic cylinder (231) is connected to the inner support shell (232), the outer wall of the inner support shell (232) contacts and slides with the inner wall of the mounting shell (222), and an inner slewing support (233) is installed on the inner support shell (232), and an inner slewing seat (234) is installed on the inner slewing support (233), and the inner slewing seat (234) extends to the outside of the outer slewing seat (213) and is installed with a fixed seat (235) connected to the pitch structure (4), and the fixed seat (235) is located above the outer slewing seat (213); The limiting part (24) includes a fixed shell (241). The fixed shell (241) is arranged inside the inner support shell (232) and outside the telescopic cylinder (231), and is connected to the moving structure (1). An activity ring (242) is slidably sleeved on the fixed shell (241), and the activity ring (242) is connected to the fixed shell (241) through a number of groups of buffer springs (243) arranged in a circle. The activity ring (242) is matched with the bottom end face of the inner support shell (232), so that when the inner support shell (232) moves up to a certain height, the bottom end face of the inner support shell (232) can contact the activity ring (242).

2. The pitching structure of a bucket wheel machine with independent slewing adjustment according to claim 1, characterized in that: The inner slewing bearing part (23) further includes a pressure sensor (236). The pressure sensor (236) is arranged on the bottom end face of the inner support shell (232), so that when the inner support shell (232) moves up to a certain height, the pressure sensor (236) can contact the activity ring (242), and when the value of the pressure sensor (236) reaches the set value, the telescopic cylinder (231) stops moving upward.

3. The pitching structure of a bucket wheel machine with independent slewing adjustment according to claim 2, characterized in that: The sealing part (25) includes a chute (251). The chute (251) is arranged in a ring shape on the outer slewing base (213), and a ring seat (252) is slidably matched in the chute (251). A telescopic sleeve (253) is installed on the ring seat (252). The telescopic sleeve (253) is sleeved outside the fixed seat (235) and is connected to the fixed seat (235).

4. The pitching structure of a bucket wheel machine with independent slewing adjustment according to claim 3, characterized in that: A support part (26) connected to the moving structure (1) is arranged inside the outer support shell (211). The support part (26) is of a floating type and is arranged in cooperation with the installation shell (222).

5. The pitching structure of a bucket wheel machine with independent slewing adjustment according to claim 4, characterized in that: The support part (26) includes a connection shell (261). The connection shell (261) is arranged inside the outer support shell (211) and is connected to the moving structure (1), and covers the outside of the rib plate seat (221). A number of guide rods (262) distributed in a circle are slidably arranged on the connection shell (261), and a limit seat (263) is arranged on each guide rod (262). The tops of the several guide rods (262) are jointly connected with a contact ring (264). The contact ring (264) is slidably sleeved outside the installation shell (222), and the contact ring (264) is connected to the connection shell (261) through a number of support springs ( ​ A polyurethane material (27) is filled between the connecting shell (261) and the rib plate seat (221) to form an elastic buffer layer.

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