Crane trolley and crane with same

Abstract

The invention provides a crane trolley and a crane with the same. The crane trolley comprises a trolley frame, a lifting device and a lifting device, and a hollow cavity is formed in the trolley frame; the trolley comprises a trolley frame, two sets of wheel assemblies, the two sets of wheel assemblies are installed at the two ends of the trolley frame in the length direction respectively, each set of wheel assemblies comprises two wheel assemblies, and the wheel assemblies are oppositely installed at the two ends of the trolley frame in the axial direction. The side face, corresponding to the end of the trolley frame, of the shaft end of each wheel assembly is arranged in the cavity in the width direction. According to the crane trolley disclosed by the embodiment of the invention, the size of the trolley frame in the length direction can be greatly reduced, the compactness of the trolley is improved, the length of a girder of a whole machine is further reduced, and the layout structure and performance of the whole crane are improved.

Description

Technical Field

[0001] The invention relates to the field of port transportation equipment, and in particular to a crane trolley and a crane having the same. Background Art

[0002] The running trolley is one of the key mechanisms in the quay crane. Its geometric size and weight have an important impact on the layout and performance of the entire quay crane.

[0003] Common running trolleys adopt a fixed-axle cantilever wheel assembly form, and most of their wheel assemblies are arranged in an exposed manner, that is, the entire set of wheel assembly components including the axle, sleeve, and support are all exposed outside the frame end beam structure, and are generally connected to the front support bolts of the frame with a 45° open section and installed on the side of the frame end beam. In addition, for most solid-belly main beam quay cranes (the trolley is suspended on the inner side of the main beam section of the quay crane, that is, the main beam is a double box beam section), due to the obstruction of the main beam structure, the axial movement range of the wheel is limited by space. Therefore, when the wheel assembly is disassembled and assembled, it can only be moved in and out from the opening along the running direction of the trolley (that is, perpendicular to the axial direction of the wheel). Furthermore, due to the layout or construction reasons, the longitudinal length of the running trolley is too long, and the front and rear beams of the quay crane have to be extended accordingly, and the weight of the trolley and the whole machine also increases, which is not conducive to the layout and performance of the whole quay crane. Summary of the invention

[0004] In view of this, the present invention provides a crane trolley and a crane having the same, which can reduce the structural size of the trolley and thus improve the overall layout structure and performance of the crane.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The crane trolley according to the first embodiment of the present invention comprises:

[0007] A small vehicle frame, wherein a hollow chamber is formed inside the small vehicle frame;

[0008] Two sets of wheel assemblies, the two sets of wheel assemblies are respectively installed at the two ends of the small vehicle frame along the length direction, each set of wheel assemblies includes two, and each set of wheel assemblies is axially oppositely installed at the two ends of the small vehicle frame,

[0009] Wherein, a side surface of the axial end of each wheel assembly corresponding to the end of the small vehicle frame is arranged inside the cavity along the width direction.

[0010] Furthermore, bearing holes are formed on each side surface along the width direction at both ends of the trolley frame.

[0011] Each of the wheel assemblies comprises:

[0012] A front bearing assembly, the front bearing assembly being mounted in the bearing hole;

[0013] A rear support assembly, the rear support assembly corresponding to the front support assembly is arranged inside the chamber on one side close to both ends of the trolley frame;

[0014] A wheel axle, one end of which is connected to the rear support assembly, and the other end of which is connected to the front support assembly, and passes through the front support assembly and extends out of a side surface of the end of the trolley frame along the width direction;

[0015] A small wheel is connected to one end of the wheel axle extending out of the end of the small vehicle frame.

[0016] Furthermore, the front support assembly comprises:

[0017] A front supporting body, wherein the front supporting body is arranged in the bearing hole, and a first supporting hole is formed in the middle of the front supporting body;

[0018] A front ball joint support seat is arranged in the first support hole, and the other end of the wheel axle is passed through the front ball joint support seat.

[0019] Furthermore, a first flange surface is formed on the outer end surface of the front support body near the periphery of the first support hole.

[0020] The front ball joint support seat comprises:

[0021] A support sleeve, one end of which is disposed in the support hole and has a second support hole formed in the middle, and the other end of which is formed with a second flange surface matching the first flange surface, wherein the second flange surface is detachably connected to the first flange surface via a first bolt;

[0022] A ball joint support is arranged in the second support hole of the support sleeve, the outer ring of the ball joint support is connected to the first support hole, and the inner ring of the ball joint support is connected to the other end of the wheel shaft.

[0023] Furthermore, a shoulder with an annular groove is formed in the second supporting hole of the support sleeve, and the outer ring of the ball joint support is arranged in the shoulder;

[0024] A first gasket is also provided on the first bolt between the second flange surface and the first flange surface.

[0025] Furthermore, the chamber includes rear support assembly accommodating chambers respectively arranged near the two ends of the trolley frame, and each group of the rear support assemblies is relatively arranged at the two ends of the rear support assembly accommodating chamber.

[0026] The rear support assembly comprises:

[0027] A rear support body, the rear support body being disposed at an end of the rear support component accommodating cavity;

[0028] A rear support is arranged on the surface of the rear support body at one end close to the front support assembly, and the rear support is connected to one end of the wheel axle extending into the accommodating cavity of the rear support assembly.

[0029] Furthermore, the rear support comprises:

[0030] A base, the base is L-shaped, the outer side surface of the long side of the L-shaped base is connected to the upper surface of the rear support body through a second bolt, and one end of the wheel axle extending into the accommodating cavity of the rear support assembly is connected to the short side of the base;

[0031] An axle clamping plate, the axle clamping plate is detachably connected to one side surface of the short side of the base, and one end of the wheel axle passes through the base and the axle clamping plate in sequence from outside to inside;

[0032] A pair of positioning components, the pair of positioning components are respectively arranged on both sides of the long side of the base in the rear support component accommodating cavity along the length direction, and the pair of positioning components respectively abut against both sides of the long side of the base.

[0033] Furthermore, a second gasket is provided on the second bolt between the long side of the base and the upper surface of the rear support body.

[0034] Furthermore, maintenance hand holes are respectively provided on the two side walls of the rear support assembly accommodating cavity corresponding to the rear support.

[0035] A crane according to an embodiment of the second aspect of the present invention comprises:

[0036] A main beam, wherein the main beam comprises a pair of truss-type side beams, wherein the inner sides of the bottoms of the pair of truss-type side beams are respectively provided with track-bearing beams, or the outer sides of the bottoms of the pair of truss-type side beams are respectively provided with track-bearing beams;

[0037] A pair of trolley guide rails, wherein the pair of trolley guide rails are respectively arranged on the rail-bearing beams of a pair of truss-type side beams;

[0038] A crane trolley, wherein the crane trolley is the crane trolley of any embodiment of the first aspect mentioned above, and the crane trolley is rollingly connected to a pair of trolley guide rails through two sets of wheel assemblies.

[0039] The above technical solution of the present invention has at least one of the following beneficial effects:

[0040] The crane trolley according to the embodiment of the present invention installs the wheel assembly inside the front and rear ends of the trolley frame, which can greatly save the length of the trolley frame and improve the space compactness of the trolley. In addition, the front support structure of the crane trolley according to the embodiment of the present invention is improved from a conventional oblique open section to a closed section, the force is significantly improved, the plate thickness and geometric dimensions can be greatly reduced, and the deadweight of the wheel assembly is also reduced accordingly.

[0041] Compared with conventional solid-belly main-beam quay cranes, the crane according to the embodiment of the present invention has the advantages of light weight and small windward area, which can minimize the impact of the equipment's deadweight and wind load on the dock structure and meet the needs of dock operations for extra-large container ships. In addition, by making full use of the gaps naturally formed between the web bars of the truss-type side beams and the feature that the axial movement range of the wheels is not restricted, the wheel assembly can be axially disassembled and assembled as a whole, without occupying the side of the end beam of the trolley frame (the front and rear of the length direction of the trolley frame) and less space above, and the space required for disassembly and maintenance is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic structural diagram of a crane according to an embodiment of the present invention;

[0043] Figure 2 for Figure 1 A-direction view in the figure;

[0044] Figure 3 It is a structural schematic diagram of a wheel assembly in a crane trolley according to an embodiment of the present invention;

[0045] Figure 4 for Figure 3 AA section view in the figure;

[0046] Figure 5 for Figure 3 BB section view in the figure;

[0047] Figure 6 for Figure 3 An enlarged schematic diagram of the a region in FIG.

[0048] Figure 7 It is a structural schematic diagram of a crane in the prior art;

[0049] Figure 8 for Figure 7 Left view of;

[0050] Fig. 9 The figure is a schematic structural diagram of a crane according to another embodiment of the present invention.

[0051] Reference numerals: 100. Truss side beam; 110. Track-bearing beam; 200. Trolley guide rail;

[0052] 300. Crane trolley; 310. Trolley frame; 311. Chamber; 3111. Rear support assembly accommodating chamber; 3112. Maintenance hand hole;

[0053] 320. Wheel assembly; 321. Front support assembly; 3211. Front support body; 3212. First flange surface; 3213. Front ball joint support seat; 32131. Support sleeve; 32132. Second flange surface; 32133. Ball joint support;

[0054] 322. rear support assembly; 3221. rear support body; 3222. rear support; 32221. base; 32222. axle plate; 32223. positioning assembly;

[0055] 323. Wheel axle; 324. Small wheel;

[0056] 10. Existing trolley; 11. Frame; 12. Wheel set; 20. Existing main beam. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0058] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0059] First, combine the attached Figure 7-8 The existing crane trolley and crane are described in detail.

[0060] like Figure 7 and Figure 8As shown, the existing trolley 10 includes a frame 11 and two pairs of wheel sets 12, and the two pairs of wheel sets 12 are respectively mounted on the front and rear ends of the frame 11. The front and rear ends of the frame 11 are respectively formed with 45° open inclined surfaces, and the shafts, sleeves, supports, etc. in the wheel set 12 are all mounted on the two ends of the inclined surface of the frame 11, so that all the accessories of the entire wheel set 12 are exposed outside the end beam structure of the frame. Therefore, when the wheel set 12 is disassembled and assembled, it is along the running direction of the trolley (i.e., perpendicular to the axial direction of the wheel, such as Figure 8 In addition, existing cranes generally use solid-belt main beam quay cranes (such as Figure 7 The existing trolley 10 is suspended on the inner side of the cross section of the quay crane main beam. Due to the obstruction of the main beam structure, the axial movement range of the wheel is limited by space. Therefore, due to the layout or construction of the existing structure, the longitudinal length of the running trolley is too long, and the front and rear beams of the quay crane have to be extended accordingly. The weight of the trolley and the whole machine also increases, affecting the layout structure and performance of the whole machine. On this basis, the inventor of the present application proposes a crane trolley and a crane having the same according to the embodiment of the present invention, which reduces the structural size of the trolley by setting the wheels in the frame, thereby improving the overall layout structure and performance of the crane.

[0061] The crane trolley according to the embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0062] According to the crane trolley 300 of the first embodiment of the present invention, Figure 1 and Figure 2 As shown, it may include: a small vehicle frame 310 and two sets of wheel assemblies 320 .

[0063] A hollow chamber 311 is formed inside the small vehicle frame 310 .

[0064] Two sets of wheel assemblies 320 are respectively installed at two ends of the small vehicle frame 310 along the length direction. Each set of wheel assemblies 320 includes two wheels, and each set of wheel assemblies 320 is axially oppositely installed at two ends of the small vehicle frame 310.

[0065] The axial end of each wheel assembly 320 corresponds to a side surface of the end of the small vehicle frame 310 and is arranged inside the cavity 311 along the width direction.

[0066] As an example, the crane trolley 300 of the embodiment of the present invention is provided with a set of wheel assemblies 320 at both ends of the length direction of the chamber 311 inside the trolley frame 310, that is, at both ends of the length direction of the chamber 311. Each set of wheel assemblies 320 includes two wheel assemblies 320. The shaft ends of the two wheel assemblies 320 are opposite to each other and are respectively arranged inside one end of the chamber 311 along the width direction of the chamber 311. Therefore, compared with the structure of the existing trolley, the crane trolley 300 of the embodiment of the present invention installs the wheel assemblies 320 inside the front and rear ends of the trolley frame 310, which can greatly save the size of the trolley frame 310 in the length direction.

[0067] In addition, the front support structure of the crane trolley 300 in the embodiment of the present invention is improved from an open section to a closed section, the force is significantly improved, the plate thickness and size of the support structure can be greatly reduced, and the deadweight of the wheel assembly 320 is also reduced accordingly.

[0068] In some embodiments, Figure 3 As shown, bearing holes (not shown) are formed on each side surface along the width direction at both ends of the small frame 310. In other words, bearing holes are respectively provided on both sides along the width direction at both ends of the small frame 310 to penetrate the wheel assembly 320.

[0069] like Figure 3 As shown, each wheel assembly 320 may include: a front support assembly 321 , a rear support assembly 322 , a wheel axle 323 and a small wheel 324 .

[0070] The front support assembly 321 is installed in the bearing hole.

[0071] The rear support assembly 322 is disposed inside the chamber 311 on one side close to both ends of the trolley frame 310 corresponding to the front support assembly 321 .

[0072] One end of the wheel axle 323 is connected to the rear support assembly 322, and the other end of the wheel axle 323 is connected to the front support assembly 321, and passes through the front support assembly 321 to extend out of a side surface of the end of the trolley frame 310 along the width direction, that is, the other end of the wheel axle 323 extends out of the trolley frame 310.

[0073] The small wheel 324 is connected to one end of the wheel axle 323 extending out of the end of the small vehicle frame 310 .

[0074] Thus, the wheel assembly 320 is stably and reliably connected to the inside of one side of the end of the trolley frame 310 along the width direction, and the trolley wheel 324, the front support assembly 321 and the wheel shaft 323 can be disassembled and installed as a whole along the axial direction of the wheel shaft 323, which is convenient and quick. In addition, the lifting height requirement during disassembly and assembly is low, and it only needs to be slightly higher than the height of the rim of the trolley wheel 324, which is safer to operate and is also conducive to the arrangement of power supply systems such as towing or drag chains above the trolley.

[0075] In addition, the axle end of the wheel assembly 320 is hidden in the box of the end beam of the trolley frame 310, so that the geometric size of the crane trolley 300 can be shortened and the space compactness is improved.

[0076] In some embodiments, Figure 3 and Figure 4 As shown, the front support assembly 321 may include: a front support body 3211 and a front ball joint support seat 3213 .

[0077] The front supporting body 3211 is disposed in the bearing hole, and a first supporting hole (not shown) is formed in the middle of the front supporting body 3211 .

[0078] The front ball joint support seat 3213 is arranged in the first support hole, and the other end of the wheel shaft 323 is passed through the front ball joint support seat 3213 .

[0079] That is to say, the front support assembly 321 including the front support body 3211 and the front ball joint support seat 3213 can stably and reliably support the front end of the wheel axle 323, and it is also convenient for disassembly, assembly and maintenance.

[0080] In some embodiments, Figure 6 As shown, a first flange surface 3212 is formed on the outer end surface of the front support body 3211 near the periphery of the first support hole.

[0081] The front ball joint support seat 3213 may include: a support sleeve 32131 and a ball joint support 32133 .

[0082] One end of the support sleeve 32131 is arranged in the support hole and a second support hole (not shown) is formed in the middle, and the other end is formed with a second flange surface 32132 matched with the first flange surface 3212, and the second flange surface 32132 is detachably connected to the first flange surface 3212 by a first bolt. Thus, a reliable connection between the front support body 3211 and the support sleeve 32131 can be achieved, and the stability of the connection of the front ball joint support seat 3213 is improved. The support sleeve 32131 can be composed of two semicircular parts, which is more convenient for disassembly and installation.

[0083] The ball joint support 32133 is disposed in the second support hole of the support sleeve 32131 , the outer ring of the ball joint support 32133 is connected to the first support hole, and the inner ring of the ball joint support 32133 is connected to the other end of the wheel shaft 323 .

[0084] Therefore, the front ball joint support seat 3213 can stably and reliably support the wheel shaft 323, and is easy to disassemble and maintain.

[0085] In some embodiments, Figure 6As shown, a shoulder with an annular groove is formed in the second support hole of the support sleeve 32131, and the outer ring of the ball joint support 32133 is arranged in the shoulder. In this way, the ball joint support 32133 is accurately positioned and bears the horizontal lateral force transmitted by the small wheel 324. In addition, a labyrinth seal structure is also provided at one end close to the outer side of the second support hole of the support sleeve 32131 to prevent rainwater from seeping in.

[0086] A first gasket is also provided on the first bolt between the second flange surface 32132 and the first flange surface 3212 to adjust the axial positioning of the wheel shaft 323 and the small wheel 324, and further adjust the track gauge of the crane trolley 300.

[0087] In some embodiments, Figure 1 and Figure 2 As shown, the chamber 311 includes rear support assembly accommodating chambers 3111 respectively arranged near the two ends of the trolley frame 310 along the length direction (that is, the length direction of the trolley frame 310), and each group of rear support assemblies 322 are relatively arranged at the two ends of the rear support assembly accommodating chamber 3111.

[0088] like Figure 3 As shown, the rear support assembly 322 may include: a rear support body 3221 and a rear support 3222 .

[0089] The rear support body 3221 is disposed at the end of the rear support component accommodating cavity 3111 .

[0090] The rear support 3222 is disposed on the surface of the rear support body 3221 at one end close to the front support assembly 321 , and the rear support 3222 is connected to one end of the wheel axle 323 extending into the interior of the small vehicle frame 310 .

[0091] That is to say, the rear support body 3221 is respectively arranged at the end parts of the rear support assembly accommodating cavity 3111 at both ends of the trolley frame 310, and the rear support 3222 is detachably connected to the upper surface of the rear support body 3221 for supporting one end of the wheel axle 323 extending into the rear support assembly accommodating cavity 3111. The structure is reliable and easy to disassemble and maintain.

[0092] In some embodiments, Figure 3 and Figure 5 As shown, the rear support 3222 may include: a base 32221 , a clamping shaft plate 32222 and a pair of positioning assemblies 32223 .

[0093] The base 32221 is L-shaped, and the outer side surface of the long side of the L-shaped base 32221 is connected to the upper surface of the rear support body 3221 through the second bolt, and the end of the wheel shaft 323 extending into the rear support component accommodating cavity 3111 is connected to the short side of the base 32221. In other words, the base 32221 is set to be L-shaped, one end of its long side is connected to the rear support body 3221, and one end of the short side is open to support the end of the wheel shaft 323 extending into the interior of the small vehicle frame 310, and the structure is stable and has good support performance. The head of the second bolt is located on the bottom surface of the rear support body 3221, and a stop plate can also be set on the head of the second bolt to clamp the head of the second bolt, thereby limiting the rotation of the second bolt, and facilitating the direct tightening of the nut on the second bolt for fixing.

[0094] The axle clamping plate 32222 is detachably connected to one side of the short side of the base 32221, and one end of the wheel axle 323 passes through the base 32221 and the axle clamping plate 32222 from outside to inside. The axle clamping plate 32222 can be used to axially fix the end of the wheel axle 323 on the other side of the base 32221 relative to the wheel axle 323 to prevent it from rotating and deviating.

[0095] A pair of positioning components 32223 are respectively arranged on both sides of the long sides of the base 32221 in the rear support component accommodating cavity 3111 along the length direction (that is, the length direction of the small vehicle frame 310), and the pair of positioning components 32223 respectively abut against both sides of the long sides of the base 32221.

[0096] As an example, Figure 5 As shown, the positioning assembly 32223 may include a positioning seat and a bolt assembly threaded through the positioning seat, the positioning seat is arranged on the surface of the rear support body 3221 on both sides of the long side of the base 32221, the bolt assembly passes through the positioning seat laterally, and the end of the bolt abuts the side end of the long side of the base 32221, and then the base 32221 is fixed by adjusting the bolt to prevent it from moving left and right.

[0097] In some embodiments, a second gasket is provided on the second bolt between the long side of the base 32221 and the upper surface of the rear support body 3221 .

[0098] Therefore, by adjusting the number of second gaskets installed, the distance between the bottom of the base 32221 and the upper surface of the rear support body 3221 is adjusted, and finally the inclination angle of the wheel axle 323 is adjusted.

[0099] In some embodiments, Figure 3 As shown, maintenance hand holes 3112 are respectively opened on the two side walls of the rear support assembly accommodating cavity 3111 corresponding to the rear support 3222.

[0100] Specifically, Figure 5As shown, the maintenance hand hole 3112 can be provided to include: a small hand hole (on the right side in the figure) and a large hand hole (on the left side in the figure), wherein the small hand hole is used for manual hand insertion to perform maintenance operations, and the large hand hole is larger than the outer dimensions of the rear support 3222 to facilitate the rear support 3222 to enter and exit from it during installation or disassembly.

[0101] The openings of the small hand hole and the large hand hole are respectively provided with a small cover plate and a large cover plate, which are fixed to the outer side of the box beam web on the small frame 310 by screws at the edge of the opening. The openings of the small hand hole and the large hand hole are also provided with a small rubber sealing gasket and a large rubber sealing gasket, which are sealed between the cover plate and the hand hole under the compaction of the small cover plate and the large cover plate. The maintenance hand hole 3112 is usually closed and is only opened in the maintenance state. By opening the small cover plate or the large cover plate, maintenance operations such as observation, disassembly or adjustment of the wheel posture can be performed on the rear support 3222.

[0102] Next, combine Figure 1 , Figure 2 as well as Fig. 9 A crane according to an embodiment of the second aspect of the present invention will be described in detail.

[0103] like Figure 1 , Figure 2 and Fig. 9 As shown, the crane of the embodiment of the present invention may include: a main beam, a pair of trolley guide rails 200 and a crane trolley 300.

[0104] The main beam includes a pair of truss-type side beams 100 , and the inner sides of the bottoms of the pair of truss-type side beams 100 are respectively provided with track-bearing beams 110 , or the outer sides of the bottoms of the pair of truss-type side beams 100 are respectively provided with track-bearing beams 110 .

[0105] A pair of trolley guide rails 200 are respectively disposed on the track-supporting beams 110 of a pair of truss-type side beams 100 .

[0106] The crane trolley 300 is the crane trolley 300 of any of the above embodiments, and the crane trolley 300 is rollingly connected to a pair of trolley guide rails 200 via two sets of wheel assemblies 320 .

[0107] That is, the main beam arrangement in the crane of the embodiment of the present invention includes a pair of truss-type side beams 100, and the support beams 110 are respectively arranged on the inner side or outer side of the bottom of the pair of truss-type side beams 100 to receive the trolley guide rails 200, and the crane trolley 300 is rollingly connected to the pair of trolley guide rails 200 on the inner side or outer side of the bottom of the pair of truss-type side beams 100 through the wheel assembly 320. The specific arrangement of the support beams 110 is selected according to the actual application, and the present invention does not limit this.

[0108] The crane according to the embodiment of the present invention adopts a truss-type main beam, which has the advantages of light weight and small windward area compared with the conventional solid-web main beam quay crane, and can minimize the impact of the equipment's deadweight and wind load on the dock structure, meeting the needs of extra-large container ships for dock operations. It is particularly suitable for docks with high wind speeds in non-working conditions, insufficient infrastructure bearing capacity, or aviation height restrictions. In addition, by making full use of the gaps naturally formed between the web bars of the truss-type side beams 100 and the feature that the axial movement range of the wheels is not restricted, the wheel assembly 320 can be axially disassembled and assembled as a whole, without occupying the side of the end beam of the trolley frame 310 (the front and rear of the length direction of the trolley frame) and less space above, and the space required for disassembly and maintenance is low.

[0109] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A crane trolley, characterized in that: include: A small vehicle frame, wherein a hollow chamber is formed inside the small vehicle frame; Two sets of wheel assemblies, the two sets of wheel assemblies are respectively installed at the two ends of the small vehicle frame along the length direction, each set of wheel assemblies includes two, and each set of wheel assemblies is axially oppositely installed at the two ends of the small vehicle frame, Wherein, a side surface of the axial end of each wheel assembly corresponding to the end of the small vehicle frame is arranged inside the cavity along the width direction.

2. The crane trolley according to claim 1, characterized in that: Bearing holes are formed on each side surface along the width direction at both ends of the small vehicle frame. Each of the wheel assemblies comprises: A front bearing assembly, the front bearing assembly being mounted in the bearing hole; a rear support assembly, the rear support assembly being arranged inside the chamber corresponding to the front support assembly; A wheel axle, one end of which is connected to the rear support assembly, and the other end of which is connected to the front support assembly, and passes through the front support assembly and extends out of a side surface of the end of the trolley frame along the width direction; A small wheel is connected to one end of the wheel axle extending out of the end of the small vehicle frame.

3. The crane trolley according to claim 2, characterized in that: The front support assembly comprises: A front supporting body, wherein the front supporting body is arranged in the bearing hole, and a first supporting hole is formed in the middle of the front supporting body; A front ball joint support seat is arranged in the first support hole, and the other end of the wheel axle is passed through the front ball joint support seat.

4. The crane trolley according to claim 3, characterized in that: A first flange surface is formed on the periphery of the first supporting hole on the outer end surface of the front supporting body. The front ball joint support seat comprises: A support sleeve, one end of which is disposed in the support hole and has a second support hole formed in the middle, and the other end of which is formed with a second flange surface matching the first flange surface, wherein the second flange surface is detachably connected to the first flange surface via a first bolt; A ball joint support is arranged in the second support hole of the support sleeve, the outer ring of the ball joint support is connected to the first support hole, and the inner ring of the ball joint support is connected to the other end of the wheel shaft.

5. The crane trolley according to claim 4, characterized in that: A shoulder with an annular groove is formed in the second supporting hole of the support sleeve, and the outer ring of the ball joint support is arranged in the shoulder; A first gasket is also provided on the first bolt between the second flange surface and the first flange surface.

6. The crane trolley according to claim 2, characterized in that: The chamber includes rear support assembly accommodating chambers respectively arranged near the two ends of the trolley frame along the length direction, and each group of rear support assemblies is relatively arranged at the two ends of the rear support assembly accommodating chamber. The rear support assembly comprises: A rear support body, the rear support body being disposed at an end of the rear support component accommodating cavity; A rear support is arranged on the surface of the rear support body at one end close to the front support assembly, and the rear support is connected to one end of the wheel axle extending into the accommodating cavity of the rear support assembly.

7. The crane trolley according to claim 6, characterized in that: The rear support comprises: A base, the base is L-shaped, the outer side surface of the long side of the L-shaped base is connected to the upper surface of the rear support body through a second bolt, and one end of the wheel axle extending into the accommodating cavity of the rear support assembly is connected to the short side of the base; An axle clamping plate, the axle clamping plate is detachably connected to one side surface of the short side of the base, and one end of the wheel axle passes through the base and the axle clamping plate in sequence from outside to inside; A pair of positioning components, the pair of positioning components are respectively arranged on both sides of the long side of the base in the rear support component accommodating cavity along the length direction, and the pair of positioning components respectively abut against both sides of the long side of the base.

8. The crane trolley according to claim 7, characterized in that: A second gasket is provided on the second bolt between the long side of the base and the upper surface of the rear supporting body.

9. The crane trolley according to claim 6, characterized in that: Maintenance hand holes are also respectively provided on the two side walls of the rear support assembly accommodating cavity corresponding to the rear support.

10. A crane, characterized in that: include: A main beam, wherein the main beam comprises a pair of truss-type side beams, wherein the inner sides of the bottoms of the pair of truss-type side beams are respectively provided with track-bearing beams, or the outer sides of the bottoms of the pair of truss-type side beams are respectively provided with track-bearing beams; A pair of trolley guide rails, wherein the pair of trolley guide rails are respectively arranged on the rail-bearing beams of a pair of truss-type side beams; A crane trolley, wherein the crane trolley is the crane trolley described in any one of claims 1-9, and the crane trolley is rollingly connected to a pair of trolley guide rails through two sets of wheel assemblies.

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