Heavy-load steering wheel

Abstract

A wheel assembly comprises a first driving assembly, a wheel and a wheel sealing assembly, the first driving assembly comprises a first driving motor and a first speed reducer, the wheel sealing assembly comprises a first protective cover and a first sealing component, and the first protective cover is connected to the outer wall face of the first speed reducer; a first sealing space for accommodating the first driving motor is defined by the first driving motor and the second driving motor; part of the first speed reducer is contained in the wheel, and the outer circumferential face of the first speed reducer and the inner circumferential face of the wheel are sealed through a first sealing component. The rotary support assembly comprises a second driving assembly, a rotary fluted disc and a rotary sealing assembly, the rotary sealing assembly comprises a second protective cover, a sealing cover and a rotary support, the rotary support is connected between the second protective cover and the sealing cover, and a second sealing space for containing the second driving assembly and the rotary fluted disc is defined by the second protective cover, the sealing cover and the rotary support. The heavy-load steering wheel can be suitable for the severe environment of sand blasting and paint spraying, and the working stability and reliability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical equipment applicable to sandblasting and painting environments, and particularly to a heavy-duty steering wheel. Background Art

[0002] For heavy-duty steering wheels, their current requirements for sealing are mostly not high. Even the rotating gear disk and the electrode are almost exposed to the environment, and they are mostly applicable to indoor, dry, and dust-free places. When used in sandblasting and painting environments, there will be problems such as dust and impurities entering the inside of the rotating gear disk, affecting the lubrication effect, accelerating wear, and reducing the service life. Moreover, it will also cause problems such as unstable operation, noise, and vibration of the equipment. Therefore, conventional heavy-duty steering wheels cannot be applied to harsh environments such as painting and sandblasting. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a heavy-duty steering wheel that can be applied to harsh environments such as painting and sandblasting.

[0004] A heavy-duty steering wheel, comprising:

[0005] A wheel assembly, including a first drive assembly, a wheel, and a wheel sealing assembly. The first drive assembly includes a first drive motor and a first reduction gear connected to the first drive motor. The wheel sealing assembly includes a first protective cover and a first sealing member. The first protective cover is connected to the outer wall surface of the first reduction gear, and the two jointly enclose a first sealed space for accommodating the first drive motor. Part of the first reduction gear is accommodated inside the wheel and is connected to the wheel inside the wheel. The outer peripheral surface of the first reduction gear and the inner peripheral surface of the wheel are sealed by the first sealing member;

[0006] A rotary support assembly, including a second drive assembly, a rotary gear disk, and a rotary sealing assembly. The second drive assembly is connected to the rotary gear disk to drive the rotary gear disk to rotate. The rotary sealing assembly includes a second protective cover, a sealing cover, and a rotary support. The rotary support is connected between the second protective cover and the sealing cover, and the three jointly enclose a second sealed space for accommodating the second drive assembly and the rotary gear disk; and

[0007] A shock absorption mechanism, including a shock absorption rocker arm and a shock absorption assembly. The shock absorption rocker arm is rotatably connected to both the wheel and the rotary support, and the shock absorption assembly is connected between the shock absorption rocker arm and the rotary support.

[0008] In one embodiment, the first sealing member includes a plurality of first skeleton oil seals, and the plurality of first skeleton oil seals are arranged at intervals along the rotation center axis of the wheel between the first speed reducer and the wheel; and / or, the wheel sealing assembly includes a plurality of first silicone pads. The first protective cover includes a main body and a connecting body connected to the main body. The connecting body is connected to the first speed reducer, and the first silicone pads are provided between the main body and the connecting body and between the connecting body and the first speed reducer.

[0009] In one embodiment, the second driving assembly includes a second driving motor and a second speed reducer connected to the second driving motor. The output wheel of the second speed reducer meshes with the slewing gear disk; the slewing support assembly includes a slewing bearing accommodated in the second sealing space and mounted on the slewing support. The slewing gear disk is sleeved on the periphery of the slewing bearing and is rotatably connected to the slewing bearing; the sealing cover is fixedly connected to the slewing gear disk.

[0010] In one embodiment, the sealing cover has a first sealing surface, a second sealing surface and a third sealing surface, and the first sealing surface, the second sealing surface and the third sealing surface are sequentially connected to form a "Z" shape as a whole; the first sealing surface and the second sealing surface are both sealingly connected to the slewing support, and the third sealing surface is sealingly connected to the slewing gear disk.

[0011] In one embodiment, the slewing sealing assembly includes a second sealing member. The second sealing member includes a plurality of first O-rings. The slewing gear disk has a connecting surface closely attached to the third sealing surface, and the plurality of first O-rings are concentrically and spacedly arranged between the third sealing surface and the connecting surface.

[0012] In one embodiment, the slewing sealing assembly includes a second sealing member. The second sealing member includes a second skeleton oil seal and a felt ring oil seal. Part of the slewing support is accommodated in the space surrounded by the first sealing surface and the second sealing surface. The second skeleton oil seal is arranged between the slewing support and the second sealing surface, and the felt ring oil seal is arranged between the slewing support and the first sealing surface.

[0013] In one embodiment, the slewing sealing assembly includes a second sealing member. The second sealing member includes a plurality of second silicone pads. The second protective cover includes a first split body and a second split body connected to the first split body. The second split body is connected to the slewing support; the first silicone pads are provided between the first split body and the second split body and between the second split body and the slewing support.

[0014] In one embodiment, a part of the second speed reducer extends out of the second protective cover, and its outer peripheral surface is sealingly connected to the slewing support, so as to divide the second sealed space into a first sub-space and a second sub-space. The slewing gear disc is located in the first sub-space, and the second driving motor is located in the second sub-space.

[0015] In one embodiment, the slewing seal assembly includes a second seal member, and the second seal member includes at least one second O-ring. The first O-ring is arranged between the outer peripheral surface of the second speed reducer and the slewing support.

[0016] In one embodiment, the heavy-duty steering wheel includes a positive pressure explosion-proof assembly, and the positive pressure explosion-proof assembly includes an air inlet joint, a purging joint and a safety valve. The first protective cover is provided with the positive pressure explosion-proof assembly, and the internal channels of the air inlet joint, the purging joint and the safety valve are all communicated with the first sealed space. The second protective cover is provided with the positive pressure explosion-proof assembly, and the internal channels of the air inlet joint, the purging joint and the safety valve are all communicated with the second sealed space; and / or,

[0017] The heavy-duty steering wheel includes an induction assembly, and the induction assembly includes a temperature sensor, a pressure sensor and a gas detection probe. The induction assembly is arranged in both the first sealed space and the second sealed space.

[0018] In the above-mentioned heavy-duty steering wheel, for the wheel assembly, the first protective cover is connected to the second speed reducer and sealed therebetween to jointly enclose a first sealed space, so that the first driving motor is accommodated in the first sealed space and isolated from the outside to be protected. In addition, by sealing between the outer peripheral surface of the second speed reducer and the inner peripheral surface of the wheel through the first seal member, the power connection between the second speed reducer and the wheel can also be isolated from the outside to be protected. For the slewing support assembly, by arranging a slewing support between the second protective cover and the seal cover and sealing the connections between the second protective cover and the slewing support and between the seal cover and the slewing support, the three can jointly enclose a second sealed space, so that the second driving assembly and the slewing gear disc are accommodated in the second sealed space and isolated from the outside to be protected.

[0019] Thus, when the entire overloaded steering wheel is in use, all the joints for power transmission in the wheel assembly and the slewing bracket assembly are in a sealed environment and isolated from the outside world. This can prevent dust from entering and causing lubricating oil pollution and wear of internal components, and also prevent paint from splashing and adhering inside, keeping the interior clean and extending the service life. As a result, the overloaded steering wheel can meet the relevant regulations and standards for equipment in environments such as dust and paint, and is suitable for working in harsh environments such as sandblasting and painting. In addition, the use of the first protective cover, the second protective cover, the sealing cover, and the slewing bracket can also make the overall appearance of the overloaded steering wheel more concise and beautiful. Further, since the joints for power transmission in the wheel assembly and the slewing bracket assembly are not easily worn and do not cause problems such as unstable operation, noise, and vibration, the working stability and reliability of the entire overloaded steering wheel are also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of the overloaded steering wheel according to the embodiment of the present application;

[0022] Figure 2 is Figure 1 a schematic structural diagram of the overloaded steering wheel from another perspective as shown;

[0023] Figure 3 is Figure 2 a top view of the overloaded steering wheel as shown;

[0024] Figure 4 is Figure 3 a sectional view of the overloaded steering wheel at A-A as shown;

[0025] Figure 5 is Figure 4 an enlarged schematic view of the structure at B in;

[0026] Figure 6 is Figure 4 an enlarged schematic view of the structure at C in;

[0027] Figure 7 is Figure 4 an enlarged schematic view of the structure at D in;

[0028] Figure 8 is Figure 4 an enlarged schematic view of the structure at E in;

[0029] Description of reference numerals:

[0030] 10. Heavy-duty steering wheel; 200. Wheel assembly; 210. First drive assembly; 211. First drive motor; 212. First reducer; 220. Wheel; 230. Wheel seal assembly; 231. First protective cover; 231a. Main body; 231b. Connector; 232. First sealed space; 233. First skeleton oil seal; 234. First silicone pad; 400. Rotary bracket assembly; 410. Second drive assembly; 411. Second drive motor; 412. Second reducer; 413. Output wheel; 420. Rotary gear disc; 421. Connecting surface; 430. Rotary seal assembly; 431. Second protective cover; 431a. First split body; 431b. Second split body; 432. Sealing cover; 432a. First sealing surface; 432b. Second sealing surface; 432c. First Three sealing surfaces; 433, slewing support; 433a, through hole; 434, second sealing space; 434a, first subspace; 434b, second subspace; 435, first O-ring; 436, second skeleton oil seal; 437, felt ring oil seal; 438, second silicone pad; 439, second O-ring; 440, slewing support; 450, screw; 600, shock absorbing mechanism; 610, shock absorbing rocker arm; 611, first axis; 612, second axis; 620, shock absorbing assembly; 621, limiting member; 622, guide member; 623, shock absorbing elastic member; 800, positive pressure explosion-proof assembly; 810, air inlet joint; 820, exhaust joint; 830, safety valve; 900, sensing assembly; 910, temperature sensor; 920, pressure sensor; 930, gas detection probe. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application 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 application.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0034] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0036] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0037] Combined with Figures 1 to 8 As shown, the present application protects a heavy-duty steering wheel 10, which includes a wheel assembly 200, a slewing bracket assembly 400 and a shock-absorbing mechanism 600. The wheel assembly 200 includes a first drive assembly 210, a wheel 220 and a wheel seal assembly 230. The first drive assembly 210 includes a first drive motor 211 and a first speed reducer 212 connected to the first drive motor 211. The wheel seal assembly 230 includes a first protective cover 231 and a first sealing member. The first protective cover 231 is connected to the outer wall surface of the first speed reducer 212, and the two jointly enclose a first sealed space 232 for accommodating the first drive motor 211. Part of the first speed reducer 212 is disposed inside the wheel 220 and is connected to the wheel 220 inside the wheel 220, and the outer peripheral surface of the first speed reducer 212 and the inner peripheral surface of the wheel 220 are sealed by the first sealing member. The slewing bracket assembly 400 includes a second drive assembly 410, a slewing gear 420 and a slewing seal assembly 430. The second drive assembly 410 is connected to the slewing gear 420 to drive the slewing gear 420 to rotate. The slewing seal assembly 430 includes a second protective cover 431, a sealing cover 432 and a slewing bracket 433. The slewing bracket 433 is connected between the second protective cover 431 and the sealing cover 432, and the three jointly enclose a second sealed space 434 for accommodating the second drive assembly 410 and the slewing gear 420. The shock-absorbing mechanism 600 includes a shock-absorbing rocker arm 610 and a shock-absorbing assembly 620. The shock-absorbing rocker arm 610 is rotatably connected to both the wheel 220 and the slewing bracket 433, and the shock-absorbing assembly 620 is connected between the shock-absorbing rocker arm 610 and the slewing bracket 433.

[0038] In the above-mentioned overloaded steering wheel 10, for the wheel assembly 200, by connecting the first protective cover 231 to the second speed reducer 412 and sealing between them, a first sealed space 232 is jointly formed. Thus, the first driving motor 211 is placed in the first sealed space 232 and isolated from the outside to be protected. In addition, by sealing between the outer peripheral surface of the second speed reducer 412 and the inner peripheral surface of the wheel 220 through the first sealing member, the power connection between the second speed reducer 412 and the wheel 220 can also be isolated from the outside to be protected. For the slewing support assembly 400, by arranging the slewing support 433 between the second protective cover 431 and the sealing cover 432 and sealing the connections between the second protective cover 431 and the slewing support 433, and between the sealing cover 432 and the slewing support 433, the three can jointly form a second sealed space 434. Thus, the second driving assembly 410 and the slewing gear 420 are placed in the second sealed space 434 and isolated from the outside to be protected.

[0039] In this way, when the entire overloaded steering wheel 10 is in use, all the connection points of power transmission in the wheel assembly 200 and the slewing support assembly 400 are in a sealed environment and isolated from the outside, which can prevent dust from entering the interior and causing lubricating oil pollution and wear of internal components, and can also prevent paint from splashing and adhering to the interior, keeping the interior clean and extending the service life. Thus, the overloaded steering wheel 10 can meet the relevant regulations and standards for equipment in environments such as dust and paint, and is suitable for working in harsh environments such as sandblasting and painting. In addition, the use of the first protective cover 231, the second protective cover 431, the sealing cover 432 and the slewing support 433 can also make the overall appearance of the overloaded steering wheel 10 more concise and beautiful. Further, since the connection points of power transmission in the wheel assembly 200 and the slewing support assembly 400 are not easily worn and do not cause problems such as unstable operation, noise and vibration, the working stability and reliability of the entire overloaded steering wheel 10 are also improved.

[0040] Combined with Figure 4 and Figure 5 As shown, specifically in this application, the first sealing member includes a plurality of first skeleton oil seals 233. The plurality of first skeleton oil seals 233 are arranged at intervals along the rotation center axis of the wheel 220 between the first speed reducer 212 and the wheel 220. It can be understood that the arrangement of the first skeleton oil seals 233 can seal the gap between the first speed reducer 212 and the wheel 220 while allowing the wheel 220 to rotate relative to the first speed reducer 212 around the rotation center axis to prevent dust and impurities from entering. Specifically, two first skeleton oil seals 233 are arranged between the first speed reducer 212 and the wheel 220. In other embodiments, the number of the first skeleton oil seals 233 can also be changed.

[0041] Continuing to refer to Figure 4 and Figure 5, specifically in the present application, the wheel seal assembly 230 includes a plurality of first silicone pads 234. The first protective cover 231 includes a main body 231a and a connecting body 231b connected to the main body 231a. The connecting body 231b is connected to the first reduction gear 212. First silicone pads 234 are provided between the main body 231a and the connecting body 231b, and between the connecting body 231b and the first reduction gear 212. By dividing the first protective cover 231 into two parts, namely the main body 231a and the connecting body 231b, the connecting body 231b can maintain the connection with the first reduction gear 212. Only by disassembling and assembling the connecting body 231b and the main body 231a can the convenience of later maintenance of the first driving motor 211 be satisfied. In addition, by disassembling and assembling the main body 231a and the connecting body 231b instead of the connecting body 231b and the first reduction gear 212, the possibility of damage to the first reduction gear 212 can be reduced. Even when damage occurs at the connection, only one of the connecting body 231b and the main body 231a needs to be replaced, which reduces the maintenance cost. Further, first silicone pads 234 are provided between the main body 231a and the connecting body 231b, and between the connecting body 231b and the first reduction gear 212, so as to use the first silicone pads 234 to achieve the sealing of the connection. In addition, the silicone pads can also provide a relatively large sealing surface, which helps to improve the sealing performance between the main body 231a and the connecting body 231b, and between the connecting body 231b and the first reduction gear 212.

[0042] As Figure 4 shown, specifically in the present application, the second driving assembly 410 includes a second driving motor 411 and a second reduction gear 412 connected to the second driving motor 411. The output wheel 413 of the second reduction gear 412 meshes with the slewing gear 420. The slewing support assembly 400 includes a slewing support 440 accommodated in the second sealing space 434 and mounted on the slewing bracket 433. The slewing gear 420 is sleeved on the periphery of the slewing support 440 and is rotatably connected to the slewing support 440. The sealing cover 432 is fixedly connected to the slewing gear 420. The second driving motor 411, the second reduction gear 412, and the slewing gear 420 are connected in sequence. The output wheel 413 of the second reduction gear 412 drives the slewing gear 420 to rotate by meshing with the slewing gear 420. In addition, the sealing cover 432 is fixedly connected to the slewing gear 420, so that the sealing cover 432 rotates with the slewing gear 420 and further drives other components mounted thereon to perform rotational motion.

[0043] Combined with Figure 4 and Figure 6As shown, in the present application, the sealing cover 432 has a first sealing surface 432a, a second sealing surface 432b, and a third sealing surface 432c, and the first sealing surface 432a, the second sealing surface 432b, and the third sealing surface 432c are sequentially connected to form a "Z" shape as a whole; both the first sealing surface 432a and the second sealing surface 432b are sealingly connected to the slewing bracket 433, and the third sealing surface 432c is sealingly connected to the slewing gear disk 420. By sealingly connecting the sealing cover 432 to the slewing bracket 433 and sealing the fixed connection between the sealing cover 432 and the slewing gear disk 420, dust and impurities can be blocked from entering.

[0044] Specifically, the rotary sealing assembly 430 includes a second sealing member, and the second sealing member includes a plurality of first O-rings 435. The slewing gear disk 420 has a connection surface 421 that is in close contact with the third sealing surface 432c. The plurality of first O-rings 435 are concentrically and spacedly arranged between the third sealing surface 432c and the connection surface 421. It can be understood that by arranging a plurality of first O-rings 435 between the connection surface 421 and the third sealing surface 432c, stable sealing between the slewing gear disk 420 and the sealing cover 432 can be achieved when the area of the connection surface 421 is small. Specifically, the sealing cover 432 is locked to the connection surface 421 of the slewing gear disk 420 by a plurality of screws 450. There are two first O-rings 435, and the two first O-rings 435 are respectively located on both sides of the screw 450. Or it can be understood that the plurality of screws 450 are all located in the gap between the two first O-rings 435, so that the two first O-rings 435 cooperate to block external dust and impurities from entering the second sealing space 434 where the slewing gear disk 420 is located along the holes penetrated by the screws 450.

[0045] Specifically, the second sealing member includes a second skeleton oil seal 436 and a felt ring oil seal 437. The partial slewing bracket 433 is accommodated in the space enclosed by the first sealing surface 432a and the second sealing surface 432b. The second skeleton oil seal 436 is provided between the slewing bracket 433 and the second sealing surface 432b, and the felt ring oil seal 437 is provided between the slewing bracket 433 and the first sealing surface 432a. It can be understood that seals can be formed between the slewing bracket 433 and the first sealing surface 432a and the second sealing surface 432b respectively. Thus, two seals are formed between the slewing bracket 433 and the sealing cover 432, which can improve the sealing effect. In addition, the first sealing surface 432a is a plane perpendicular to the rotation center axis of the slewing gear disc 420. By providing a felt oil seal between the first sealing surface 432a and the slewing bracket 433, the dense felt material of the felt oil seal is used for sealing to block the entry of dust and impurities, and at the same time, it will not hinder the rotation of the sealing cover 432 with the slewing gear disc 420. In addition, the second sealing surface 432b is a cylindrical surface surrounding the rotation center axis of the slewing gear disc 420. By providing the second skeleton oil seal 436 between the second sealing surface 432b and the slewing bracket 433, the gap between the second sealing surface 432b and the slewing bracket 433 can be sealed while meeting the requirement of the relative rotation of the sealing cover 432 with respect to the slewing bracket 433 to block the entry of dust and impurities.

[0046] Combined Figure 4 、 Figure 7 and Figure 8 As shown, specifically in the present application, the second sealing member includes a plurality of second silicone pads 438. The second protective cover 431 includes a first split body 431a and a second split body 431b connected to the first split body 431a. The second split body 431b is connected to the slewing bracket 433; second silicone pads 438 are provided between the first split body 431a and the second split body 431b, and between the second split body 431b and the slewing bracket 433.

[0047] By dividing the second protective cover 431 into a first part 431a and a second part 431b, the second part 431b can be kept connected to the slewing bracket 433. Only by disassembling and assembling the first part 431a and the second part 431b can the convenience of later maintenance of the second drive motor 411 be satisfied. In addition, by disassembling and assembling the first part 431a and the second part 431b instead of the second part 431b and the slewing bracket 433, the possibility of damage to the slewing bracket 433 can be reduced. Even when damage occurs at the connection, only one of the first part 431a and the second part 431b needs to be replaced, thus reducing the maintenance cost. Further, second silicone pads 438 are provided between the first part 431a and the second part 431b, and between the second part 431b and the slewing bracket 433, so as to use the second silicone pads 438 to achieve sealing at the connection. In addition, the silicone pads can also provide a relatively large sealing surface, which helps to improve the sealing performance between the first part 431a and the second part 431b, and between the second part 431b and the slewing bracket 433.

[0048] Continue to refer to Figure 4 , Figure 7 and Figure 8 , in this application, part of the second speed reducer 412 extends out of the second protective cover 431, and its outer peripheral surface is hermetically connected to the slewing bracket 433 to divide the second sealed space 434 into a first sub-space 434a and a second sub-space 434b. The slewing gear disc 420 is located in the first sub-space 434a, and the second drive motor 411 is located in the second sub-space 434b. It can be understood that when dust and impurities enter due to seal failure in any one of the first sub-space 434a and the second sub-space 434b, the sealing structure between the outer peripheral surface of the second speed reducer 412 and the slewing bracket 433 can block the dust and impurities from entering the other sub-space, thus preventing the entire second sealed space 434 from failing completely. In addition, such an arrangement can also quickly lock the seal failure position through the sub-space with seal failure, so as to improve the later maintenance efficiency.

[0049] Further, the second sealing member includes at least one second O-ring 439, and the first O-ring 435 is disposed between the outer peripheral surface of the second speed reducer 412 and the rotary bracket 433. It can be understood that the rotary bracket 433 is provided with a through hole 433a, and a part of the second speed reducer 412 extends out of the second protective cover 431 and then passes through the through hole 433a, and is rotatably connected to the rotary gear disk 420 in the space surrounded by the sealing cover 432 and the rotary bracket 433. Specifically, the second speed reducer 412 is sealingly connected to the inner wall surface of the through hole 433a. By providing the second O-ring 439 between the outer peripheral surface of the second speed reducer 412 and the rotary bracket 433, stable sealing between the second speed reducer 412 and the rotary bracket 433 can be achieved when the area of the inner wall surface of the through hole 433a is small.

[0050] Combined Figures 1 to 4 As shown, specifically in the present application, the heavy-duty steering wheel 10 includes a positive pressure explosion-proof component 800, and the positive pressure explosion-proof component 800 includes an air inlet joint 810, an exhaust joint 820 and a safety valve 830. The first protective cover 231 is provided with the positive pressure explosion-proof component 800, and the internal channels of the air inlet joint 810, the exhaust joint 820 and the safety valve 830 are all communicated with the first sealed space 232. The second protective cover 431 is provided with the positive pressure explosion-proof component 800, and the internal channels of the air inlet joint 810, the exhaust joint 820 and the safety valve 830 are all communicated with the second sealed space 434. It can be understood that by providing the positive pressure explosion-proof component 800 for both the first protective cover 231 and the second protective cover 431, the risk of explosion and fire of the first drive motor 211 in the first protective cover 231 and the second drive motor 411 in the second protective cover 431 can be effectively reduced, thereby improving the safety of the heavy-duty steering wheel 10. Specifically, clean external air can be sent into the first sealed space 232 and the second sealed space 434 through the air inlet joint 810, so as to form a positive pressure environment to prevent external harmful gases and particulate matter from entering, and the harmful gases and particulate matter in the first sealed space 232 and the second sealed space 434 can be discharged through the exhaust joint 820 to maintain a normal ventilation state. The safety valve 830 is used to prevent the pressure in the first sealed space 232 and the second sealed space 434 from exceeding the design allowable value, thereby protecting the safety of the equipment.

[0051] As Figure 4As shown, specifically, the overload steering wheel 10 includes a sensing component 900, and the sensing component 900 includes a temperature sensor 910, a pressure sensor 920, and a gas detection probe 930. The sensing component 900 is provided in both the first sealed space 232 and the second sealed space 434. It can be understood that by providing the sensing component 900 in the first sealed space 232 and the second sealed space 434, the internal environment can be monitored in real time, so that the external system can immediately give feedback according to the abnormal conditions sensed by the sensing component 900 and take corresponding countermeasures. In this application, the temperature sensor 910, the pressure sensor 920, and the gas detection probe 930 are all installed in both the first sealed space 232 and the second sealed space 434 at the same time. Among them, the temperature sensor 910 is used to sense the temperature of the internal environment, the pressure sensor 920 is used to sense the pressure of the internal environment, and the gas detection probe 930 is used to detect the combustible gas in the internal environment. Once any one of the temperature sensor 910, the pressure sensor 920, and the gas detection probe 930 senses an abnormal condition, the external system will take feedback.

[0052] In this application, it is defined that the shock-absorbing rocker arm 610 is rotatably connected to the slewing bracket 433 around the first axis 611 and is rotatably connected to the wheel 220 around the second axis 612 (i.e., the rotation center axis of the wheel 220). The first axis 611 is arranged offset from the second axis 612 and the two are parallel. The shock-absorbing component 620 is connected between the shock-absorbing rocker arm 610 and the slewing bracket 433. During the vibration of the wheel 220 during travel, the shock-absorbing component 620 can absorb and release energy, thereby reducing the vibration and impact received by the slewing bracket 433 and other structural components mounted on the slewing bracket 433, playing a shock-absorbing role.

[0053] Further, the shock absorption assembly 620 includes a limiting member 621, a guiding member 622, and a shock absorption elastic member 623. The limiting member 621 is fixedly connected to the slewing bracket 433. The guiding member 622 is connected between the shock absorption rocker arm 610 and the limiting member 621, and guides the limiting member 621 during the relative rotation of the shock absorption rocker arm 610 and the slewing bracket 433. The limiting member 621 moves relative to the guiding member 622 and has a first limit position and a second limit position. The shock absorption elastic member 623 is connected between the shock absorption rocker arm 610 and the limiting member 621, and can elastically act on the limiting member 621 during the movement of the limiting member 621 relative to the guiding member 622. In this way, through the elastic action exerted by the shock absorption elastic member 623 on the limiting member 621 between the shock absorption rocker arm 610 and the limiting member 621, energy is absorbed and released to play a shock absorption role. In addition, dust and sand in the environment will not cause any impact on the shock absorption mechanism 600, so that the shock absorption mechanism 600 can maintain a good shock absorption effect, thereby making the reliability and safety of the heavy-duty steering wheel 10 relatively high. At the same time, each structural member in the shock absorption mechanism 600 is easy to repair and replace, and the material cost is low.

[0054] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0055] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A heavy-load steering wheel, characterized in that: include: A wheel assembly, comprising a first drive assembly, a wheel and a wheel sealing assembly, wherein the first drive assembly comprises a first drive motor and a first reducer connected to the first drive motor, and the wheel sealing assembly comprises a first protective cover and a first sealing member, wherein the first protective cover is connected to an outer wall surface of the first reducer, and the two together form a first sealed space for accommodating the first drive motor; a portion of the first reducer is accommodated inside the wheel and connected to the wheel inside the wheel, and an outer peripheral surface of the first reducer and an inner peripheral surface of the wheel are sealed by the first sealing member; A slewing bracket assembly, comprising a second drive assembly, a slewing gear disc and a slewing sealing assembly, wherein the second drive assembly is connected to the slewing gear disc to drive the slewing gear disc to rotate; the slewing sealing assembly comprises a second protective cover, a sealing cover and a slewing bracket; the slewing bracket is connected between the second protective cover and the sealing cover, and the three together form a second sealed space for accommodating the second drive assembly and the slewing gear disc; and The shock absorbing mechanism comprises a shock absorbing rocker arm and a shock absorbing assembly. The shock absorbing rocker arm is rotatably connected to the wheel and the slewing bracket, and the shock absorbing assembly is connected between the shock absorbing rocker arm and the slewing bracket.

2. The heavy-duty steering wheel according to claim 1, characterized in that: The first sealing component includes a plurality of first skeleton oil seals, which are arranged at intervals between the first reducer and the wheel along the rotation center axis of the wheel; and / or the wheel sealing assembly includes a plurality of first silicone pads, the first protective cover includes a main body and a connector connected to the main body, the connector is connected to the first reducer, and the first silicone pads are arranged between the main body and the connector, and between the connector and the first reducer.

3. The heavy-duty steering wheel according to claim 1, characterized in that: The second drive component includes a second drive motor and a second reducer connected to the second drive motor, and the output wheel of the second reducer is meshed with the rotating gear disc; the rotating bracket assembly includes a rotating support accommodated in the second sealed space and installed on the rotating bracket, and the rotating gear disc is sleeved on the periphery of the rotating support and rotatably connected to the rotating support; the sealing cover is fixedly connected to the rotating gear disc.

4. The heavy-duty steering wheel according to claim 3, characterized in that: The sealing cover has a first sealing surface, a second sealing surface and a third sealing surface, and the first sealing surface, the second sealing surface and the third sealing surface are connected in sequence to form a "Z" shape as a whole; the first sealing surface and the second sealing surface are both sealed to the rotating bracket, and the third sealing surface is sealed to the rotating gear disk.

5. The heavy-duty steering wheel according to claim 4, characterized in that: The rotary seal assembly includes a second sealing component, the second sealing component includes a plurality of first O-rings, the rotary gear disk has a connecting surface close to the third sealing surface, and the plurality of first O-rings are concentrically and spaced apart between the third sealing surface and the connecting surface.

6. The heavy-duty steering wheel according to claim 4, characterized in that: The rotary sealing assembly includes a second sealing component, which includes a second skeleton oil seal and a felt ring oil seal. Part of the rotary bracket is accommodated in the space surrounded by the first sealing surface and the second sealing surface. The second skeleton oil seal is arranged between the rotary bracket and the second sealing surface, and the felt ring oil seal is arranged between the rotary bracket and the first sealing surface.

7. The heavy-duty steering wheel according to claim 3, characterized in that: The rotary sealing assembly includes a second sealing member, the second sealing member includes a plurality of second silicone pads, the second protective cover includes a first split body and a second split body connected to the first split body, and the second split body is connected to the rotary bracket; The second silicone pad is disposed between the first split body and the second split body, and between the second split body and the swivel bracket.

8. The heavy-duty steering wheel according to claim 3, characterized in that: Part of the second reducer extends out of the second protective cover, and its outer peripheral surface is sealed and connected to the rotating bracket to divide the second sealed space into a first subspace and a second subspace. The rotating gear is located in the first subspace, and the second drive motor is located in the second subspace.

9. The heavy-duty steering wheel according to claim 8, characterized in that: The rotary seal assembly includes a second sealing component, the second sealing component includes at least one second O-ring, and the second O-ring is arranged between the outer peripheral surface of the second reducer and the rotary support.

10. The heavy-duty steering wheel according to any one of claims 1 to 9, characterized in that: The heavy-load steering wheel includes a positive pressure explosion-proof component, which includes an air intake connector, a purge connector and a safety valve; the first protective cover is provided with the positive pressure explosion-proof component, and the internal channels of the air intake connector, the purge connector and the safety valve are all connected to the first sealed space; the second protective cover is provided with the positive pressure explosion-proof component, and the internal channels of the air intake connector, the purge connector and the safety valve are all connected to the second sealed space; and / or, The heavy-load steering wheel includes a sensing component, which includes a temperature sensor, a pressure sensor and a gas detection probe; the sensing component is arranged in both the first sealed space and the second sealed space.

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