Knuckle bearing, track walking device and crane

Abstract

The utility model relates to the field of hoisting machinery, and discloses a knuckle bearing, a track walking device and a crane. The knuckle bearing comprises a first rotating part and a second rotating part, one of the first rotating part and the second rotating part is provided with an inner spherical surface, the other one is provided with an outer spherical surface, the inner spherical surface is matched with the outer spherical surface, and a clamping structure is formed on the outer side wall of the first rotating part and extends in the radial direction of the knuckle bearing; one end of the limiting piece is connected with the second rotating part, the other end of the limiting piece is arranged on the outer side of the first rotating part, a limiting structure is arranged on the part, opposite to the first rotating part, of the limiting piece, and the limiting structure is used for limiting the clamping structure to move in the direction away from the second rotating part in the axial direction of the knuckle bearing; and a preset distance is formed between the limiting structure and the clamping structure. The limiting structure abuts against the clamping structure, so that the first rotating part and the second rotating part are mutually limited in the axial direction of the knuckle bearing, the first rotating part and the second rotating part are prevented from being separated from each other, and the stability of the knuckle bearing is improved.

Description

Technical Field

[0001] This utility model relates to the field of lifting machinery technology, specifically to joint bearings, track travel devices, and cranes. Background Technology

[0002] Currently, in the lifting industry, the requirements for the lifting capacity of cranes are constantly increasing, and conventional cranes are unable to meet the needs of lifting heavier loads. To solve this problem, rail-mounted cranes have emerged, in which the weight of the crane and the load is transferred to the ground via rails.

[0003] In related technologies, the rail-mounted traveling device of a rail crane includes a traveling wheel assembly and a beam assembly. The beam assembly is connected to the traveling wheel assembly, which is movably mounted on the rail. To enable the traveling wheel assembly to swing relative to the beam assembly, the traveling wheel assembly is connected to the beam assembly via a spherical bearing. In known spherical bearings, the inner ring is connected to the beam assembly, and the outer ring is connected to the traveling wheel assembly.

[0004] However, since the spherical bearing cannot withstand axial tension, when the beam assembly is misaligned, the inner and outer rings of the spherical bearing may separate, causing the beam assembly to detach from the corresponding wheel assembly, which poses a potential hazard. Utility Model Content

[0005] In view of this, the present invention provides a spherical bearing, a track-walking device, and a crane to solve or improve the problem that the inner and outer rings of the spherical bearing may separate, which can easily lead to the separation of the beam assembly from the corresponding traveling wheel assembly.

[0006] In a first aspect, this utility model provides a spherical bearing, comprising:

[0007] A first rotating part and a second rotating part, one of which has an inner spherical surface and the other has an outer spherical surface, the inner spherical surface and the outer spherical surface cooperate with each other, and the outer side wall of the first rotating part has a snap-fit ​​structure that extends radially along the joint bearing;

[0008] A limiting member is provided, one end of which is connected to the second rotating part, and the other end of which is located on the outside of the first rotating part. The portion of the limiting member opposite to the first rotating part is provided with a limiting structure. The limiting structure is used to restrict the snap-fit ​​structure from moving away from the second rotating part along the axial direction of the joint bearing. A preset distance is provided between the limiting structure and the snap-fit ​​structure so that the snap-fit ​​structure can move towards the limiting structure.

[0009] In one optional embodiment, the number of the limiting members is at least two, and the at least two limiting members are distributed circumferentially along the second rotating part, with any two adjacent limiting members connected to each other.

[0010] In one optional embodiment, one of the limiting member and the second rotating part is provided with a positioning protrusion, and the other is provided with a positioning groove. The protrusion direction of the positioning protrusion and the depth direction of the positioning groove both extend radially along the joint bearing.

[0011] The positioning protrusion is placed in the positioning groove and along the axial direction of the joint bearing, the positioning protrusion and the positioning groove form a limiting position.

[0012] In one optional embodiment, the limiting member is configured as an arc-shaped plate, the limiting structure is configured as an arc-shaped structure concentrically arranged with the limiting member, and the snap-fit ​​structure is configured as an arc-shaped structure or an annular structure concentrically arranged with the limiting structure.

[0013] In one alternative embodiment, one of the first rotating part and the second rotating part includes a first seat and an inner ring, and the other includes a second seat and an outer ring.

[0014] The first base is provided with a column structure, the inner ring is fixedly fitted onto the column structure, and the outer surface of the inner ring is set as the outer spherical surface;

[0015] The second base is provided with a mounting groove, and the outer ring is fixedly installed in the mounting groove. The inner surface of the outer ring is set as the inner spherical surface.

[0016] In one alternative embodiment, at least one of the first and second seats is provided with a positioning hole and a connecting hole, the positioning hole being used to install a positioning shaft, and the connecting hole being provided through the axial direction of the spherical bearing and for threaded fasteners to pass through.

[0017] Secondly, this utility model also provides a track-walking device, comprising:

[0018] Beam assembly and wheel assembly;

[0019] And, as described above, the joint bearing;

[0020] The joint bearing is disposed between the beam assembly and the wheel assembly, and one of the first rotating part and the second rotating part is connected to the wheel assembly, while the other is connected to the beam assembly.

[0021] In one alternative embodiment, the beam assembly includes a first beam, a second beam, and a third beam;

[0022] The first beam is connected to the second beam, and at least two third beams are connected to the second beam. The at least two third beams are arranged along the walkable direction of the track walking device. At least two walking wheel assemblies are connected to each third beam, and the at least two walking wheel assemblies are arranged along the walkable direction of the track walking device.

[0023] In one optional embodiment, the track-walking device further includes:

[0024] A support base is provided along the walkable direction of the track-walking device, and the support base is connected to the front or rear end of the walking wheel assembly.

[0025] A scraper is adjustablely positioned on the support base along the height direction of the track traveling device, and the scraper is used to slide in contact with the track.

[0026] Thirdly, this utility model also provides a crane, comprising:

[0027] The track-walking device described above, wherein the number of the track-walking devices is at least two;

[0028] A connecting platform that connects the beam assemblies of two adjacent track-walking devices;

[0029] A crane boom that connects the beam assemblies of two adjacent track-tracing devices.

[0030] The spherical bearing provided by this utility model has a spherical sliding fit between the first rotating part and the second rotating part, so that the traveling wheel assembly and the beam assembly connected by the spherical bearing can rotate relative to each other along the horizontal axis and the vertical axis.

[0031] The limiting structure of the upper limit member of the second rotating part is spaced apart on the side of the first rotating part where the locking structure is opposite to the second rotating part. During the process of the first rotating part and the second rotating part disengaging from each other, the limiting structure and the locking structure abut against each other, so that the first rotating part and the second rotating part mutually limit each other along the axial direction of the spherical bearing, thereby preventing the first rotating part and the second rotating part from disengaging from each other, improving the stability of the spherical bearing, and thus preventing the travel wheel assembly and the beam assembly connected by the spherical bearing from disengaging from each other, thereby improving the stability of the connection between the travel wheel assembly and the beam assembly.

[0032] In addition, by setting a preset gap between the snap-fit ​​structure and the limiting structure, the snap-fit ​​structure and the limiting structure can avoid each other during the rotation of the first rotating part and the second rotating part, thus avoiding mutual interference between the snap-fit ​​structure and the limiting structure and affecting the rotation between the first rotating part and the second rotating part.

[0033] The track-walking device and crane provided by this utility model, since they include the joint bearing provided by this utility model, also include all the above-mentioned advantages of the joint bearing. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 A front view of a spherical bearing provided for an embodiment of this utility model;

[0036] Figure 2 A schematic diagram illustrating the fit between the outer spherical surface of the inner ring and the inner spherical surface of the outer ring, provided for an embodiment of this utility model;

[0037] Figure 3 for Figure 1 Sectional view of AA;

[0038] Figure 4 A schematic diagram of the structure of the first rotating part and the second rotating part when they slide relative to each other, provided for an embodiment of this utility model;

[0039] Figure 5 This is an exploded view of the joint bearing provided in an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the walking wheel assembly provided in an embodiment of the present utility model;

[0041] Figure 7 This is a schematic diagram of the track walking device provided in an embodiment of the present utility model;

[0042] Figure 8 A schematic diagram of the structure of the crane provided in an embodiment of this utility model.

[0043] Explanation of reference numerals in the attached figures:

[0044] 100. Spherical plain bearing; 1. First rotating part; 101. Outer spherical surface; 102. Snap-fit ​​structure; 103. First seat; 1031. Column structure; 104. Inner ring; 105. Positioning hole; 106. Connecting hole; 2. Second rotating part; 201. Inner spherical surface; 202. Positioning groove; 203. Second seat; 2031. Mounting groove; 204. Outer ring; 3. Limiting component; 301. Limiting structure; 302. Positioning protrusion; 4. Beam assembly; 401. First beam; 402. Second beam; 403. Third beam; 5. Traveling wheel assembly; 501. Mounting seat; 502. Support wheel; 503. Limiting wheel; 504. Drive device; 6. Support seat; 7. Scraper; 8. Connecting platform; 9. Crane boom; 10. Connecting plate; 11. Self-lubricating layer; 12. Positioning shaft; 13. Slewing bearing. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0046] The following is combined Figures 1 to 8 The spherical bearing 100 provided in the embodiments of this utility model is described below.

[0047] Specifically, the spherical bearing 100 includes a first rotating part 1, a second rotating part 2, and a limiting member 3.

[0048] In this device, one of the first rotating part 1 and the second rotating part 2 is provided with an inner spherical surface 201, and the other is provided with an outer spherical surface 101. The inner spherical surface 201 and the outer spherical surface 101 cooperate with each other. For example, at least a portion of the outer spherical surface 101 is inserted into the inner spherical surface 201, and the inner spherical surface 201 can slide relative to the outer spherical surface 101. Optionally, in the track walking device, the first rotating part 1 is connected to the beam assembly 4, and the second rotating part 2 is connected to the walking wheel assembly 5. The first rotating part 1 and the second rotating part 2 are spherically slidingly engaged, so that the walking wheel assembly 5 can rotate relative to the beam assembly 4 about the vertical axis Z and also about the horizontal axis relative to the beam assembly 4.

[0049] A snap-fit ​​structure 102 is provided on the side wall of the first rotating part 1, extending radially along the spherical bearing 100. Optionally, the snap-fit ​​structure 102 can be an annular protrusion formed on the side wall of the first rotating part 1 radially along the spherical bearing 100, or a groove formed on the side wall of the first rotating part 1 radially along the spherical bearing 100; neither is limited. The snap-fit ​​structure 102 is used to cooperate with the limiting member 3 to restrict the snap-fit ​​structure 102 from moving away from the second rotating part 2, thereby preventing the first rotating part 1 and the second rotating part 2 from disengaging.

[0050] One end of the limiting member 3 is connected to the second rotating part 2, and the other end of the limiting member 3 is located on the outside of the first rotating part 1. A limiting structure 301 is provided on the portion of the limiting member 3 opposite to the first rotating part 1. The limiting structure 301 is used to restrict the movement of the snap-fit ​​structure 102 along the axial direction L of the spherical bearing away from the second rotating part 2. For example, along the axial direction L of the spherical bearing 100, the limiting structure 301 is located on the side of the snap-fit ​​structure 102 away from the second rotating part 2.

[0051] There is a preset gap between the limiting structure 301 and the locking structure 102 so that the locking structure 102 can move toward the limiting structure 301, thereby avoiding interference between the locking structure 102 and the limiting structure 301 when the first rotating part 1 and the second rotating part 2 slide relative to each other.

[0052] Understandably, reference Figures 3-4 As shown, the preset distance H between the limiting structure 301 and the locking structure 102 should satisfy the condition that when the first rotating part 1 and the second rotating part 2 slide relative to each other, there will be no mutual interference between the limiting structure 301 and the locking structure 102. The preset distance H can be obtained from experiments or simulations. The sliding of the first rotating part 1 and the second rotating part 2 includes sliding when their axes are collinear, or sliding when their axes have an angle.

[0053] Optionally, the limiting structure 301 is a protrusion arranged circumferentially along the spherical bearing 100. Correspondingly, when the snap-fit ​​structure 102 is a protrusion, the limiting structure 301 and the snap-fit ​​structure 102 at least partially overlap along the axial direction of the spherical bearing 100. When the snap-fit ​​structure 102 is a groove, the limiting structure 301 is placed in the groove, and along the radial direction of the spherical bearing 100, the limiting structure 301 at least partially overlaps with the sidewall of the groove.

[0054] In this embodiment, the first rotating part 1 and the second rotating part 2 are connected by a spherical sliding fit so that the walking wheel assembly 5 and the beam assembly 4 connected by the spherical bearing 100 can rotate relative to each other along the horizontal axis and the vertical axis Z.

[0055] The limiting structure 301 of the upper limit member 3 of the second rotating part 2 is spaced apart on the side of the first rotating part 1 opposite to the second rotating part 2 of the snap-fit ​​structure 102. During the process of the first rotating part 1 and the second rotating part 2 disengaging from each other, the limiting structure 301 and the snap-fit ​​structure 102 abut against each other, so that the first rotating part 1 and the second rotating part 2 mutually limit each other along the axial direction of the spherical bearing 100, thereby preventing the first rotating part 1 and the second rotating part 2 from disengaging from each other, improving the stability of the spherical bearing 100, and thus preventing the walking wheel assembly 5 and the beam assembly 4 connected by the spherical bearing 100 from disengaging from each other, thereby improving the stability of the connection between the walking wheel assembly 5 and the beam assembly 4.

[0056] In addition, by setting a preset distance between the snap-fit ​​structure 102 and the limiting structure 301, the snap-fit ​​structure 102 and the limiting structure 301 can avoid each other during the rotation of the first rotating part 1 and the second rotating part 2, so as to avoid mutual interference between the snap-fit ​​structure 102 and the limiting structure 301 and affect the rotation between the first rotating part 1 and the second rotating part 2.

[0057] In some embodiments provided by this utility model, there is a gap between the outer circumferential side of the snap-fit ​​structure 102 and the inner side of the limiting member 3, so as to prevent interference between the snap-fit ​​structure 102 and the limiting member 3 when the first rotating part 1 and the second rotating part 2 slide relative to each other.

[0058] In some embodiments provided by this utility model, the limiting member 3 is configured as an arc-shaped plate. Correspondingly, the limiting structure 301 is configured as an arc-shaped structure concentrically arranged with the limiting member 3, and the snap-fit ​​structure 102 is configured as an arc-shaped structure or an annular structure concentrically arranged with the limiting structure 301.

[0059] In this embodiment, by setting the limiting member 3 as an arc-shaped plate, the contact area between the limiting structure 301 and the snap-fit ​​structure 102 can be increased in the circumferential direction of the limiting member 3, thereby making the load more evenly distributed between the limiting structure 301 and the snap-fit ​​structure 102, reducing the risk of deformation or damage due to local overload.

[0060] In some embodiments provided by this utility model, the number of limiting members 3 is at least two, the at least two limiting members 3 are distributed along the circumference of the second rotating part 2, and any two adjacent limiting members 3 are connected to each other.

[0061] In this embodiment, by setting at least two limiting members 3 to limit the first rotating part 1 together, the first rotating part 1 is subjected to more balanced force. For example, during the process of the first rotating part 1 and the second rotating part 2 being subjected to axial tension, the first rotating part 1 and the second rotating part 2 can maintain a relatively stable posture, avoiding the problem of deflection or tilting between the first rotating part 1 and the second rotating part 2 during the process of being subjected to axial tension.

[0062] Furthermore, by setting at least two limiting members 3 to jointly limit the first rotating part 1, even if one limiting member 3 fails, the other limiting members 3 can still play a certain role in fixing it, reducing the risk of the first rotating part 1 and the second rotating part 2 separating. At the same time, by using at least two limiting members 3, a larger load can be borne together, reducing the possibility of the limiting members 3 being damaged due to excessive stress.

[0063] Furthermore, all limiting members 3 are configured as arc-shaped plates, and at least two limiting members 3 are arranged circumferentially along the joint bearing 100 and spliced ​​together to form a ring structure. This arrangement can further balance the force on the first rotating part 1.

[0064] In some embodiments provided by this utility model, the spherical bearing 100 further includes a connecting plate 10, and any two adjacent limiting members 3 are connected by the connecting plate 10.

[0065] Optionally, the connecting plate 10 is welded to two adjacent limiting members 3 respectively to improve the connection strength of the connecting plate 10 and reduce the number of parts.

[0066] Of course, the connecting plate 10 is not limited to being welded to two adjacent limiting members 3. For example, in some other embodiments, the connecting plate 10 can also be connected to the two adjacent limiting members 3 by threaded fasteners. Alternatively, the connecting plate 10 can be welded to one of the two adjacent limiting members 3 and connected to the other of the two adjacent limiting members 3 by threaded fasteners. This arrangement facilitates the disassembly of the snap-fit ​​component.

[0067] It is understood that the two adjacent limiting members 3 are not limited to being connected by the connecting plate 10. For example, in other embodiments provided by this utility model, the two adjacent limiting members 3 can be welded together or connected by threaded fasteners.

[0068] In some embodiments provided by this utility model, the limiting member 3 is detachably connected to the second rotating part 2 by a threaded fastener. Specifically, the threaded fastener passes through the limiting member 3 and is connected to the second rotating part 2. This arrangement facilitates the disassembly or replacement of the limiting member 3. For example, if the limiting member 3 is damaged or corroded, it can be easily disassembled and replaced.

[0069] In some embodiments provided by this utility model, one of the limiting member 3 and the second rotating part 2 is provided with a positioning protrusion 302, and the other is provided with a positioning groove 202. For example Figure 3 The image shows an example where a positioning protrusion 302 is provided on the limiting member 3 and a positioning groove 202 is provided on the second rotating part 2. Of course, the reverse is also possible.

[0070] The protrusion direction of the positioning protrusion 302 and the depth direction of the positioning groove 202 both extend radially along the spherical bearing 100. The positioning protrusion 302 is placed in the positioning groove 202, and along the axial direction of the spherical bearing 100, the positioning protrusion 302 and the positioning groove 202 form a limiting position.

[0071] In this embodiment, the positioning protrusion 302 and the positioning groove 202 limit the contact area between the limiting member 3 and the second rotating part 2. When bearing load, the larger contact area can disperse the pressure, thereby reducing the pressure per unit area, so that the limiting member 3 and the second rotating part 2 can transmit a larger load.

[0072] Furthermore, the positioning protrusion 302 and the positioning groove 202 provide a limiting fit, preventing relative displacement between the limiting member 3 and the second rotating part 2, thus improving the stability of the connection between the limiting member 3 and the second rotating part 2. For example, when the limiting member 3 is connected to the second rotating part 2 via a threaded fastener, the limiting fit between the positioning protrusion 302 and the positioning groove 202 can also prevent the threaded fastener from being affected by shearing action.

[0073] In some embodiments provided by this utility model, one of the first rotating part 1 and the second rotating part 2 includes a first seat 103 and an inner ring 104, and the other includes a second seat 203 and an outer ring 204. For example, Figure 3 The illustration shows an example where the first rotating part 1 includes a first seat 103 and an inner ring 104, and the second rotating part 2 includes a second seat 203 and an outer ring 204; of course, the reverse is also possible.

[0074] The first base 103 is provided with a column structure 1031, and the inner ring 104 is fixedly fitted onto the column structure 1031. For example, the inner ring 104 is connected to the column structure 1031 by interference fit, welding, or threaded fasteners. The outer surface of the inner ring 104 is set as an outer spherical surface 101.

[0075] The second housing 203 is provided with a mounting groove 2031, and the outer ring 204 is fixedly installed in the mounting groove 2031. For example, the outer ring 204 is connected to the mounting groove 2031 by interference fit, welding, or by threaded fasteners. The inner surface of the outer ring 204 is set as an inner spherical surface 201.

[0076] In this embodiment, by providing a first seat 103 and a second seat 203, the first seat 103 and the second seat 203 are respectively connected to two parts with a rotational relationship. For example, the first seat 103 and the second seat 203 are respectively connected to the beam assembly 4 and the walking wheel assembly 5.

[0077] The first base 103 is connected to the inner ring 104, so that the inner ring 104 and the first base 103 can be machined separately, thereby improving the machining accuracy of the inner ring 104 and reducing the machining difficulty of the first rotating part 1. Similarly, the second base 203 is connected to the outer ring 204, so that the outer ring 204 and the second base 203 can be machined separately, thereby improving the machining accuracy of the outer ring 204 and reducing the machining difficulty of the second rotating part 2.

[0078] In some embodiments provided by this utility model, the first base 103 is provided with a positioning hole 105 and a connecting hole 106.

[0079] The positioning hole 105 is used to install the positioning shaft 12, and the connecting hole 106 is provided through the axial direction of the spherical bearing 100 and is used for threaded fasteners to pass through, that is, the connecting hole 106 is used to pass through the first seat 103.

[0080] In this embodiment, by providing a positioning hole 105 on the first base 103, a positioning shaft 12 can be installed so that the positioning shaft 12 can be inserted into the positioning hole 105 of the beam assembly 4 or the wheel assembly 5, so that the spherical bearing 100 and the beam assembly 4 or the wheel assembly 5 are positioned relative to each other in a direction perpendicular to the positioning hole 105, thereby avoiding relative movement between the spherical bearing 100 and the beam assembly 4 or the wheel assembly 5 and improving the connection stability.

[0081] By providing a connecting hole 106 on the first base 103, a threaded fastener can pass through the connecting hole 106 and be threadedly connected to the beam assembly 4 or the wheel assembly 5, thereby connecting the first base 103 to the beam assembly 4 or the wheel assembly 5. In addition, the positioning shaft 12 can prevent the threaded fastener from being subjected to shearing action.

[0082] Understandably, the second base 203 can also be provided with corresponding positioning holes and connection holes.

[0083] In some embodiments provided by this utility model, a self-lubricating layer 11 is provided between the inner spherical surface 201 and the outer spherical surface 101. For example, the self-lubricating layer 11 may be, but is not limited to, polytetrafluoroethylene, polyoxymethylene, bronze or graphite.

[0084] This utility model embodiment also provides a track walking device.

[0085] Specifically, the track-walking device includes a beam assembly 4, a walking wheel assembly 5, and a joint bearing 100 as described above.

[0086] The spherical bearing 100 is disposed between the beam assembly 4 and the wheel assembly 5. One of the first rotating part 1 and the second rotating part 2 is connected to the wheel assembly 5, and the other is connected to the beam assembly 4. For example, Figure 6The example shown is where the first rotating part 1 is connected to the beam assembly 4 and the second rotating part 2 is connected to the traveling wheel assembly 5; of course, the reverse is also possible.

[0087] It should be noted that the track-walking device includes the spherical bearing 100, and thus includes all the advantages of the spherical bearing 100 mentioned above, so it will not be elaborated further.

[0088] In some embodiments provided by this utility model, the beam assembly 4 includes a first beam 401, a second beam 402, and a third beam 403.

[0089] The first beam 401 is connected to the second beam 402. The first beam 401 is used to install the crane boom 9.

[0090] At least two third beams 403 are connected to the second beam 402, and the at least two third beams 403 are arranged along the walkable direction of the track walking device.

[0091] At least two traveling wheel assemblies 5 are connected to each of the third beams 403, and the at least two traveling wheel assemblies 5 are arranged along the travel direction of the track-traveling device. Each traveling assembly is rotatably connected to the third beam 403 via a corresponding spherical bearing 100. The traveling assemblies are used for running along the track.

[0092] In this embodiment, by setting at least two third beams 403 on the second beam 402, and each third beam 403 is provided with at least two traveling wheel assemblies 5, the installation area of ​​the second beam 402 is increased, so that more traveling wheel assemblies 5 can be set on the second beam 402, thereby increasing the load-bearing capacity of the track traveling device.

[0093] In some embodiments of this utility model, the number of second beams 402 is at least two. The arrangement direction of the at least two second beams 402 intersects with the walkable direction of the track walking device, and each second beam 402 is connected to the first beam 401. Each second beam 402 is provided with a corresponding third beam 403.

[0094] In this embodiment, by setting at least two second beams 402 to jointly support the first beam 401, the load transmitted by the first beam 401 can be shared among the at least two second beams 402, reducing the problem of stress concentration in the second beams 402. Each second beam 402 is provided with a corresponding traveling wheel assembly 5, so that the track traveling device has more traveling wheel assemblies 5, thereby increasing the load-bearing capacity of the track traveling device.

[0095] refer to Figure 3As shown, in some embodiments of this utility model, the track-walking device further includes a slewing bearing 13. The rotation axis of the slewing bearing 13 extends along the vertical direction of the track-walking device.

[0096] The second beam 402 is rotatably connected to the first beam 401 through a corresponding slewing bearing 13, and the third beam 403 is rotatably connected to the second beam 402 through a corresponding slewing bearing 13. The walking wheel assembly 5 is connected to the third beam 403 through a spherical bearing 100.

[0097] In this embodiment, by providing a slewing bearing 13 between the first beam 401 and the second beam 402, the second beam 402 can swing relative to the first beam 401 about the vertical axis Z. By providing a slewing bearing 13 between the second beam 402 and the third beam 403, the third beam 403 can swing relative to the second beam 402 about the vertical axis Z.

[0098] The traveling wheel assembly 5 is connected to the third beam 403 via a spherical bearing 100. This allows the traveling wheel assembly 5 to swing relative to the third beam 403 around the vertical axis Z, and also allows it to swing relative to the third beam 403 around the horizontal axis, so that the traveling wheel assembly 5 can adapt to the height changes of the track.

[0099] As described above, the second beam 402 swings relative to the first beam 401 around the vertical axis Z, the third beam 403 swings relative to the second beam 402 around the vertical axis Z, and the walking wheel assembly 5 swings relative to the third beam 403 around the vertical axis Z, so that the track walking device can freely switch between curved track and straight track.

[0100] For example, during the operation of the track-walking device, as it gradually transitions from an arc-shaped track to a straight track, the second beam 402 and the third beam 403 rotate via corresponding slewing bearings 13, and the traveling wheel assembly 5 rotates via spherical bearings 100. This allows the second beam 402, the third beam 403, and the traveling wheel assembly 5 to adapt to the changing track shape, thus enabling the track-walking device to adapt to changes in track shape and complete the transition from an arc-shaped track to a straight track. Similarly, the track-walking device can also transition from a straight track to an arc-shaped track.

[0101] In some embodiments provided by this utility model, the walking wheel assembly 5 includes a mounting base 501, a support wheel set, and a limiting wheel 503.

[0102] The mounting base 501 is used to connect to the beam assembly 4. For example, the mounting base 501 is connected to the third beam 403 via a spherical bearing 100.

[0103] The support wheel assembly includes at least two support wheels 502, which are rotatably and spaced apart from each other on the mounting base 501. Each of the at least two support wheels 502 runs along a corresponding track. The arrangement direction of the at least two support wheels 502 intersects with the travel direction. Optionally, the number of support wheel assemblies is at least two, and the at least two support wheel assemblies are arranged along the travel direction.

[0104] The limiting wheel 503 is located between two adjacent support wheels 502 and is rotatably connected to the mounting base 501. The rotation axis of the limiting wheel 503 intersects with the rotation axis of the support wheel 502. The limiting wheel 503 is used to be placed between two adjacent tracks.

[0105] In this embodiment, by including at least two support wheels 502 in the support wheel assembly, the load can be shared among the support wheels 502, avoiding stress concentration on the support wheels 502. By providing a limiting wheel 503 on the traveling wheel assembly 5, and the limiting wheel 503 being located between two adjacent tracks, the limiting wheel 503 interacts with the tracks, providing a guiding effect on the traveling wheel assembly 5, allowing the traveling wheel assembly 5 to run on an arc track, or switch between an arc track and a straight track.

[0106] Furthermore, the traveling wheel assembly 5 also includes a drive unit 504, which is mounted on the mounting base 501 and is connected to the corresponding support wheel 502 for driving the support wheel 502 to rotate. Optionally, each support wheel assembly is provided with a corresponding drive unit 504. The drive unit 504 can be configured as an electric motor or a hydraulic motor.

[0107] In some embodiments provided by this utility model, the track walking device further includes a support base 6 and a scraper 7.

[0108] Along the travel direction of the track-walking device, the support base 6 is connected to the front or rear end of the traveling wheel assembly 5. For example, the support base 6 is connected to the front or rear end of the mounting base 501. Optionally, the support base 6 is welded to the mounting base 501 or connected by threaded fasteners.

[0109] The scraper 7 is positioned adjustablely on the support base 6 along the height direction of the track traveling device, and the scraper 7 is used to slide in contact with the track.

[0110] In this embodiment, by providing a support seat 6 and a scraper 7 on the walking wheel assembly 5, and by having the scraper 7 slide in contact with the track, the scraper 7 can remove impurities or hard objects from the track surface during the walking process of the walking wheel assembly 5, thereby preventing impurities or hard objects from damaging the track or the walking wheel assembly 5, and preventing the track walking device from bumping, making the track walking device run more smoothly.

[0111] By making the position of scraper 7 adjustable, the position of scraper 7 can be readjusted after wear occurs, so that scraper 7 can make better contact with the track surface.

[0112] Optionally, the scraper 7 is provided with a waist-shaped groove that extends along the height direction of the track traveling device. A threaded fastener passes through the waist-shaped groove and is threadedly connected to the support seat 6 to fix the scraper 7 to the support seat 6. By providing a waist-shaped groove on the scraper 7, the position of the scraper 7 can be adjusted along the extension direction of the waist-shaped groove.

[0113] Furthermore, the scraper 7 is connected to the support base 6 by at least two threaded fasteners, which are arranged along the length of the slot. The connection between the scraper 7 and the support base 6 by at least two threaded fasteners prevents the scraper 7 from rotating around the threaded fasteners, thus enabling the scraper 7 to better remove impurities or hard objects from the track surface.

[0114] refer to Figure 8 As shown, a crane is also provided in this embodiment of the utility model.

[0115] Specifically, the crane includes a track-tracing device as described above, and the number of track-tracing devices is at least two.

[0116] The connecting platform 8 connects the beam assemblies 4 of two adjacent track-walking devices. For example, the connecting platform 8 connects the first beam 401 of two adjacent track-walking devices.

[0117] The crane boom 9 connects the beam assemblies 4 of two adjacent track-tracing devices. For example, the crane boom 9 connects the first beam 401 of two adjacent track-tracing devices.

[0118] In this embodiment, the crane includes a track-tracing device, and thus includes all the advantages of a track-tracing device described above.

[0119] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A knuckle bearing, characterized by, The utility model relates to a joint bearing, which comprises: a first rotating part (1) and a second rotating part (2), one of the first rotating part (1) and the second rotating part (2) is provided with an inner spherical surface (201), the other is provided with an outer spherical surface (101), the inner spherical surface (201) and the outer spherical surface (101) are matched with each other, an outer side wall of the first rotating part (1) is formed with a clamping structure (102) extending along the radial direction of the joint bearing; a limiting piece (3) is connected to the second rotating part (2) at one end and is arranged outside the first rotating part (1) at the other end, a limiting structure (301) is arranged on the part opposite to the first rotating part (1) of the limiting piece (3), the limiting structure (301) is used for limiting the clamping structure (102) from moving in the axial direction of the joint bearing to the direction away from the second rotating part (2), and the limiting structure (301) and the clamping structure (102) have a preset interval, so that the clamping structure (102) can move towards the direction close to the limiting structure (301).

2. The knuckle bearing of claim 1, wherein, The number of the limiting piece (3) is at least two, and the at least two limiting pieces (3) are distributed along the circumferential direction of the second rotating part (2), and any two adjacent limiting pieces (3) are connected to each other.

3. The knuckle bearing of claim 1, wherein, One of the limiting piece (3) and the second rotating part (2) is provided with a positioning protrusion (302), and the other is provided with a positioning groove (202), the protruding direction of the positioning protrusion (302) and the depth direction of the positioning groove (202) extend along the radial direction of the joint bearing; The positioning protrusion (302) is arranged in the positioning groove (202) and extends along the axial direction of the joint bearing, and the positioning protrusion (302) and the positioning groove (202) form a limit.

4. The knuckle bearing of claim 1, wherein, The limiting piece (3) is arranged as an arc-shaped plate, the limiting structure (301) is arranged as an arc-shaped structure concentric with the limiting piece (3), and the clamping structure (102) is arranged as an arc-shaped structure or a ring-shaped structure concentric with the limiting structure (301).

5. The knuckle bearing according to any one of claims 1-4, characterized in that, One of the first rotating part (1) and the second rotating part (2) comprises a first seat body (103) and an inner ring (104), and the other comprises a second seat body (203) and an outer ring (204); The first seat body (103) is provided with a column structure (1031), the inner ring (104) is fixedly sleeved on the column structure (1031), and the outer surface of the inner ring (104) is arranged as the outer spherical surface (101); The second seat body (203) is provided with a mounting groove (2031), the outer ring (204) is fixedly mounted in the mounting groove (2031), and the inner surface of the outer ring (204) is arranged as the inner spherical surface (201).

6. The knuckle bearing of claim 5, wherein, At least one of the first seat body (103) and the second seat body (203) is provided with a positioning hole (105) for mounting a positioning shaft (12) and a connecting hole (106) penetrating through in the axial direction of the knuckle bearing and used for passing a threaded fastener.

7. A rail travel device characterized by comprising: The knuckle bearing comprises: a beam body assembly (4) and a walking wheel assembly (5); and the knuckle bearing as claimed in any one of claims 1-6; wherein the knuckle bearing is arranged between the beam body assembly (4) and the walking wheel assembly (5), one of the first rotating part (1) and the second rotating part (2) is connected with the walking wheel assembly (5), and the other is connected with the beam body assembly (4).

8. The rail travel device according to claim 7, characterized in that The beam body assembly (4) comprises a first beam body (401), a second beam body (402) and a third beam body (403); The first beam body (401) is connected with the second beam body (402), the second beam body (402) is connected with at least two third beam bodies (403), and the at least two third beam bodies (403) are arranged in the direction in which the track walking device can walk, and the third beam body (403) is connected with at least two walking wheel assemblies (5), and the at least two walking wheel assemblies (5) are arranged in the direction in which the track walking device can walk.

9. The rail travel device according to claim 7, wherein The track walking device further comprises: a support seat (6) connected to the front end or the rear end of the walking wheel assembly (5) in the direction in which the track walking device can walk; a scraper (7) adjustably arranged on the support seat (6) in the height direction of the track walking device, and used for sliding contact with the track.

10. A crane, characterized in that The track walking device comprises: at least two track walking devices as claimed in any one of claims 7-9; a connecting platform (8) connecting the beam body assemblies (4) of adjacent two track walking devices; a crane jib (9) connecting the beam body assemblies (4) of adjacent two track walking devices.

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