A large pin-tooth follow-up transmission mechanism of a guyed mast crane

Abstract

The present application belongs to the technical field of crane, and provides a large pin gear follow-up transmission mechanism of a diagonal bracing type mast crane, comprising a chassis, a pin gear slewing ring arranged on the top of the chassis, and a slewing structure arranged on the top of the pin gear slewing ring, wherein the pin gear slewing ring is improved by the reduction device of the diagonal bracing type mast crane, the transmission gear is made to slide up and down on the surface of the reduction machine output shaft by adding a follow-up device, and the transmission gear is made to move in cooperation with the deformation of the pin gear slewing ring by the action of the follow-up spring, so that when the pin gear slewing ring rotates and appears to be disturbed downward or upturned, the follow-up spring will make the transmission gear move adaptively to maintain a normal working state, effectively solving the problems of wear and interference between the transmission gear and the pin gear, thereby prolonging the service life of the whole transmission device, and the device is simple and practical in structure and convenient to disassemble and maintain, thereby greatly reducing the enterprise operation and maintenance cost and improving the equipment operation and maintenance efficiency.

Description

Technical Field

[0001] This invention belongs to the field of crane technology, and more specifically, relates to a large pin tooth follow-up transmission mechanism for a diagonal mast crane. Background Technology

[0002] Currently, the pinion drive system used in inclined mast cranes employs a rotation mechanism consisting of a large pin-toothed turntable, a slewing reduction mechanism, a slewing structure, and a chassis. The large pin-toothed turntable is mounted on the chassis, the slewing structure is mounted on the large pin-toothed turntable, and the slewing reduction mechanism is fixed to the chassis. During the rotation of the large pin-toothed turntable, the pinion gear needs to precisely engage with the large pin-toothed turntable. Due to the structural deformation caused by the size of the pinion turntable under stress, wear and interference occur in the meshing between the pinion gear and the pinions, affecting the service life of the entire transmission device and increasing the likelihood of transmission failures during use.

[0003] Therefore, there is an urgent need to design a new pin-tooth transmission structure to specifically solve the problem of the fit between transmission gears and pin-tooth transmission. Summary of the Invention

[0004] This invention provides a large pin tooth follow-up transmission mechanism for a diagonal mast crane, which has advantages such as solving existing technical problems.

[0005] This invention is implemented as follows:

[0006] A large pin tooth follower transmission mechanism for a diagonal mast crane includes a chassis, a pin tooth rotary table on the top of the chassis, a rotary structure on the top of the pin tooth rotary table, a guide device and a follower device. The guide device is fixedly installed on the top of the chassis and close to the pin tooth rotary table to limit the maximum upward tilt and downward deflection of the pin tooth rotary table.

[0007] The follower device includes a structural frame, which is fixedly installed on the top of the chassis. A reducer is fixedly installed on the top of the structural frame. The output shaft of the reducer is vertically downward and externally slidably connected to a transmission gear. The transmission gear meshes with one side of the pin-tooth rotary disk. A bearing is fixedly connected to the bottom of the output shaft of the reducer. The bearing is fixedly installed inside a bearing seat at the bottom of the structural frame. An end cover is fixedly installed on the top of the bearing seat. Multiple guide rods are evenly arranged around the top of the end cover. Each guide rod is fitted with a follower spring. The two ends of each follower spring are fixedly connected to the top of the end cover and the bottom of the transmission gear, respectively.

[0008] Furthermore, a flat key is fixedly connected to the output shaft surface of the reducer in the vertical direction, the transmission gear is sleeved on the outside of the output shaft, and the flat key is slidably connected to the keyway of the transmission gear.

[0009] Furthermore, the guiding device includes a support frame, which is fixedly connected to the chassis. Threaded rods are fastened to the top and bottom of the right side of the support frame. Limiting pulleys are fixedly connected to adjacent ends of the two threaded rods, and the two limiting pulleys are respectively close to the four peripheral edges of the top and bottom of the pin tooth rotary table.

[0010] Furthermore, the extension dimension of the follower spring is greater than the maximum upward tilt dimension of the pin tooth rotary disk, and the distance between the bottom of the transmission gear and the top of each guide rod is greater than the maximum downward tilt dimension of the pin tooth rotary disk.

[0011] The beneficial effects of this invention are:

[0012] This invention improves the reduction gear of a slanted mast crane by adding a follower device. This allows the transmission gear to slide up and down on the output shaft surface of the reducer. Combined with the action of a follower spring, the transmission gear moves in accordance with the deformation of the pin tooth rotary table. This ensures that when the pin tooth rotary table rotates downwards or upwards, the follower spring will adaptively move the transmission gear to maintain normal operation, always maintaining the meshing transmission relationship between the transmission gear and the pin tooth. This effectively solves the problems of wear and interference between the transmission gear and the pin tooth, thus extending the service life of the entire transmission device. Furthermore, this device has a simple and practical structure and is easy to disassemble and maintain, greatly reducing enterprise operation and maintenance costs and improving equipment operation and maintenance efficiency.

[0013] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a top view of the structure of the present invention;

[0016] Figure 2 for Figure 1A schematic diagram of the cross-sectional structure at point AA;

[0017] Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure at point BB;

[0018] Figure 4 This is a side view of the guiding device of the present invention.

[0019] Figure 5 This is a side view of the follower device of the present invention.

[0020] Figure 6 This is a magnified view of the structure at point A in Figure 5.

[0021] Explanation of reference numerals in the attached drawings: 1. Chassis; 2. Turntable; 3. Rotary structure; 4. Guide device; 41. Support frame; 42. Threaded rod; 43. Limiting pulley; 5. Follower device; 51. Reducer; 52. Structural frame; 53. Transmission gear; 54. Bearing; 55. Spring; 56. Guide rod; 57. Shaft seat; 58. End cover; 59. Flat key; 510. Keyway. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] Example

[0026] Specifically, such as Figure 1-6A large pin tooth follower transmission mechanism for a slanted mast crane is provided, including a chassis 1, a pin tooth rotary disk 2 is provided on the top of the chassis 1, a rotary structure 3 is provided on the top of the pin tooth rotary disk 2, and a guide device 4 and a follower device 5. The guide device 4 is fixedly installed on the top of the chassis 1 and close to the pin tooth rotary disk 2, and is used to limit the maximum upward tilt and downward deflection of the pin tooth rotary disk 2.

[0027] The follower device 5 includes a structural frame 52, which is fixedly installed on the top of the chassis 1. A reducer 51 is fixedly installed on the top of the structural frame 52. The output shaft of the reducer 51 is vertically downward and externally slidably connected to a transmission gear 53. The transmission gear 53 meshes with one side of the pin-tooth rotary disk 2. A bearing 54 is fixedly connected to the bottom of the output shaft of the reducer 51. The bearing 54 is fixedly installed inside the bearing seat 57 at the bottom of the structural frame 52. An end cover 58 is fixedly installed on the top of the bearing seat 57. Multiple guide rods 56 are evenly arranged around the top of the end cover 58. Each guide rod 56 is fitted with a follower spring 55. The two ends of each follower spring 55 are fixedly connected to the top of the end cover 58 and the bottom of the transmission gear 53, respectively.

[0028] A flat key 59 is fixedly connected to the output shaft surface of the reducer 51 in the vertical direction. The transmission gear 53 is sleeved on the outside of the output shaft. The flat key 59 is slidably connected to the keyway 510 of the transmission gear 53. By combining the structural characteristics of the transmission gear 53 itself and by setting a long strip flat key 59 on the output shaft surface of the reducer 51, the sliding cooperation between the flat key 59 and the keyway 510 of the transmission gear 53 enables the transmission gear 53 to slide on the output shaft surface of the reducer 51 while maintaining a stable and normal transmission output. This lays a good foundation for the stable transmission of this device as the moving pin tooth rotary disk 2 deforms.

[0029] Specifically, due to the heavy load borne by the large pin-tooth rotary table 2 during normal operation, the structure will deform to a certain extent. When the pin-tooth rotary table 2 tilts upward, the transmission gear 53 can move on the output shaft of the reducer 51 to ensure the fit between the transmission gear 53 and the pin-tooth rotary table 2. When the pin-tooth rotary table 2 tilts downward, the transmission gear 53 can also be driven by the pin-tooth rotary table 2 to compress the follower spring 55 and move to follow its deformation and perform normal transmission work. When the pin-tooth rotary table 2 rotates without tilting downward or upward, the follower spring 55 will force the transmission gear 53 to return to the normal working state, thus achieving the purpose of maintaining the fit and transmission relationship between the transmission gear 53 and the pin-tooth rotary table 2 at all times. This effectively solves the previous problem of high requirements for the fit between the transmission gear 53 and the pin teeth and the easy wear, greatly improving the service life of the parts. Moreover, the structure of this mechanism is simple and easy to disassemble and maintain, reducing the maintenance cost of this type of crane and extending the maintenance cycle.

[0030] The guiding device 4 includes a support frame 41, which is fixedly connected to the chassis 1. Threaded rods 42 are fastened to the top and bottom of the right side of the support frame 41. Limiting pulleys 43 are fixedly connected to the adjacent ends of the two threaded rods 42. The two limiting pulleys 43 are respectively close to the four periphery of the top and bottom of the pin tooth rotary table 2, as shown in the figure. By symmetrically arranging two threaded rods 42 with limiting pulleys 43 on the top and bottom edges of the pin tooth rotary table 2 and fixing them to the chassis 1 through the support frame 41, when the pin tooth rotary table 2 tilts upward or downward, the limiting pulleys 43 and threaded rods 42 prevent excessive deformation of the pin tooth rotary table 2, thus preventing safety accidents. This allows the crane to increase the stability and safety of equipment operation during operation through the guiding device 4.

[0031] The extension dimension of the follower spring 55 is greater than the maximum upward tilt dimension of the pin tooth rotary disk 2, and the distance between the bottom of the transmission gear 53 and the top of each guide rod 56 is greater than the maximum downward tilt dimension of the pin tooth rotary disk 2.

[0032] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to a specific order or hierarchy.

[0033] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0034] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

Claims

1. A large pin tooth follow-up transmission mechanism for a diagonal mast crane, comprising a chassis (1), wherein a pin tooth rotary disk (2) is provided on the top of the chassis (1), and a rotary structure (3) is provided on the top of the pin tooth rotary disk (2), characterized in that, It also includes a guide device (4) and a follower device (5). The guide device (4) is fixedly installed on the top of the chassis (1) and close to the pin tooth rotary table (2) to limit the maximum upward tilt and downward deflection of the pin tooth rotary table (2). The follower device (5) includes a structural frame (52), which is fixedly installed on the top of the chassis (1). A reducer (51) is fixedly installed on the top of the structural frame (52). The output shaft of the reducer (51) is vertically downward and is externally slidably connected to a transmission gear (53). The transmission gear (53) meshes with one side of the pin tooth rotary disk (2). A bearing (54) is fixedly connected to the bottom of the output shaft of the reducer (51). The bearing (54) is fixedly installed inside the shaft seat (57) at the bottom of the structural frame (52). An end cover (58) is fixedly installed on the top of the shaft seat (57). Multiple guide rods (56) are evenly arranged around the top of the end cover (58). Each guide rod (56) is fitted with a follower spring (55). The two ends of each follower spring (55) are fixedly connected to the top of the end cover (58) and the bottom of the transmission gear (53), respectively.

2. The large pin-tooth follow-up transmission mechanism for a diagonal mast crane according to claim 1, characterized in that, A flat key (59) is fixedly connected to the output shaft surface of the reducer (51) in the vertical direction. The transmission gear (53) is sleeved on the outside of the output shaft. The flat key (59) is slidably connected to the keyway (510) of the transmission gear (53).

3. The large pin-tooth follow-up transmission mechanism for a diagonal mast crane according to claim 1, characterized in that, The guide device (4) includes a support frame (41), which is fixedly connected to the chassis (1). Threaded rods (42) are fastened to the top and bottom of the right side of the support frame (41). Limiting pulleys (43) are fixedly connected to the adjacent ends of the two threaded rods (42). The two limiting pulleys (43) are respectively close to the four periphery of the top and bottom of the pin tooth rotary table (2).

4. The large pin-tooth follow-up transmission mechanism for a diagonal mast crane according to claim 2, characterized in that, The extension dimension of the follower spring (55) is greater than the maximum upward tilt dimension of the pin tooth rotary disk (2), and the distance between the bottom of the transmission gear (53) and the top of each guide rod (56) is greater than the maximum downward tilt dimension of the pin tooth rotary disk (2).

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