Anti-drawing rotating shaft and slewing mechanism combined structure of folding arm crane in tunnel

Abstract

The invention relates to the technical field of slewing mechanisms, and discloses an anti-drawing rotating shaft of a folding arm crane in a tunnel and a slewing mechanism combined structure, the rotating shaft comprises: a transmission shaft, one end of which is connected with a motor through a bearing end cover; the self-lubricating bearing is mounted in the bearing end cover; the transmission shaft end cover is used for limiting the axial displacement of the transmission shaft; the clamp spring gasket is mounted in the reserved annular groove of the transmission shaft; the shaft end check ring is located on one side of the clamp spring gasket; the bearing end cover is connected with the motor through a fastener and is used for fixing the self-lubricating bearing and supporting the rotating shaft; and a driving shaft of the motor realizes power transmission through a transmission shaft. Through cooperation of the transmission shaft end cover, the transmission shaft, the bearing end cover, the self-lubricating bearing, the shaft end check ring, the clamp spring gasket, the connecting piece and the motor, efficient and stable operation of the folding arm crane in the tunnel is achieved through tensioning force, separation of the transmission shaft and the motor and equipment damage caused by overweight hoisting are avoided, the maintenance cost is reduced, and the efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of slewing mechanisms, and in particular to a combined structure of an anti-pulling rotating shaft and a slewing mechanism of a folding arm crane in a tunnel. Background Art

[0002] TBM is widely used in the excavation of long and large tunnels, especially in tunnels with great burial depth, long distance and good rock properties. In the process of TBM excavation construction, the use of folding arm crane in material handling, mechanical lifting and other processes is prone to damage due to excessive lifting weight, which seriously affects the subsequent construction process. Therefore, solving the problem of tensile strength of the rotating shaft and slewing mechanism of the folding arm crane in the tunnel is of vital importance in tunnel material handling and mechanical lifting.

[0003] The existing folding arm cranes are mainly optimized in terms of flexibility, folding arm inflection point, fixed chassis, application environment, etc. The problem of tensile plates of the rotating shaft and slewing mechanism of the folding arm crane has not been effectively solved. Therefore, there is an urgent need for a combined structure of a tensile and pull-out resistant rotating shaft and slewing mechanism of an in-track folding arm crane. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a combined structure of a tensile-resistant rotating shaft and a slewing mechanism of a folding arm crane in a tunnel, which solves the problem that the tensile-resistant plate of the rotating shaft and the slewing mechanism of the folding arm crane has not been effectively solved in the prior art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a combined structure of an anti-pulling rotating shaft and a slewing mechanism of a knuckle boom crane in a tunnel, wherein the rotating shaft comprises:

[0006] A transmission shaft, which is used to transmit driving force, one end of which is connected to the motor through a bearing end cover;

[0007] Self-lubricating bearings, which are installed in the bearing end cover and are used to provide axial and radial support for the transmission shaft;

[0008] The transmission shaft end cover is installed at the other end of the transmission shaft, used to limit the axial displacement of the transmission shaft, and is fixed to the equipment body through a rigid connection;

[0009] A circlip washer, which is installed in a reserved annular groove of the transmission shaft and is used to prevent the transmission shaft from axially sliding in the self-lubricating bearing;

[0010] A shaft end retaining ring, which is located on one side of the circlip washer and is used to further lock the transmission shaft;

[0011] A bearing end cover, which is connected to the motor through a fastener and is used to fix the self-lubricating bearing and support the rotating shaft;

[0012] The motor has a drive shaft that transmits power through a transmission shaft and is fixed to one side of the bearing end cover by fasteners.

[0013] Preferably, the fasteners include a plurality of bolts for connecting the bearing end cover and the motor, and the bolts are hexagon socket bolts.

[0014] Preferably, the self-lubricating bearing is a stepped cylindrical structure, comprising a small cylinder and a large cylinder, wherein the central openings of the small cylinder and the large cylinder have the same aperture, and the aperture matches the outer diameter of the transmission shaft.

[0015] Preferably, the transmission shaft end cover is an integral structure and is made of one of carbon steel or alloy steel.

[0016] Preferably, the shaft end retaining ring is annular, and its inner diameter is the same as the outer diameter of the transmission shaft, and its outer diameter is the same as the outer diameter of the small cylinder of the self-lubricating bearing.

[0017] Preferably, the retaining spring washer is Ω-shaped, and its inner diameter is the same as the outer diameter of the reserved annular groove of the transmission shaft, and its outer diameter is larger than the outer diameter of the transmission shaft but smaller than the outer diameter of the shaft end retaining ring.

[0018] Preferably, the cross-section of the left end of the transmission shaft is polygonal, the middle part is a threaded structure for adjusting the position, and the right end is provided with a flat key groove.

[0019] Preferably, it is characterized in that the top of the bearing end cover is a cylindrical structure, the diameter of the central opening matches the large cylindrical outer diameter of the self-lubricating bearing, and the bottom is provided with a stepped groove for matching with the self-lubricating bearing.

[0020] The present invention provides a combined structure of an anti-pulling rotating shaft and a slewing mechanism for a folding arm crane in a tunnel, which has the following beneficial effects:

[0021] The present invention realizes efficient and stable operation of the folding arm crane in the tunnel when hoisting heavy objects, or materials and construction machinery through the coordinated cooperation of the transmission shaft end cover, the transmission shaft, the bearing end cover, the self-lubricating bearing, the shaft end retaining ring, the retaining spring washer, the connecting piece and the motor, and utilizes the tension between the bearing end cover, the self-lubricating bearing, the shaft end retaining ring and the retaining spring washer, thereby avoiding the problem of separation of the transmission shaft and the driving motor caused by the excessive weight of the heavy object hoisted by the folding arm crane, avoiding the influence of the subsequent construction process on the need for repair and maintenance of the damaged folding arm crane, reducing the economic loss caused by repairing the folding arm crane, and improving the work efficiency of hoisting heavy objects in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a structural breakdown diagram of the present invention;

[0024] Figure 3 It is a schematic diagram of the transmission shaft end cover of the present invention;

[0025] Figure 4 It is a schematic diagram of the internal structure of the transmission shaft end cover of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the self-lubricating bearing end cover of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the self-lubricating bearing of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the transmission shaft end retaining ring of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the circlip washer of the present invention;

[0030] Fig. 9 It is a schematic diagram of the motor structure of the present invention.

[0031] Among them, 1. Transmission shaft end cover; 2. Transmission shaft; 3. Bearing end cover; 4. Self-lubricating bearing; 5. Shaft end retaining ring; 6. Circlip washer; 7. Fasteners; 8. Motor. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to better understand the present invention, the above contents are described in detail in conjunction with specific embodiments. Embodiment 1:

[0034] Please see attached Figure 1 -Attached Fig. 9The embodiment of the present invention provides a pull-out resistant rotating shaft and a slewing mechanism combined structure of a folding arm crane in a tunnel, wherein the rotating shaft comprises: a transmission shaft 2, which is used to transmit driving force and one end of which is connected to a motor 8 through a bearing end cover 3; a self-lubricating bearing 4, which is installed in the bearing end cover 3 and is used to provide axial and radial support for the transmission shaft 2; a transmission shaft end cover 1, which is installed at the other end of the transmission shaft 2 and is used to limit the axial displacement of the transmission shaft 2 and is fixed to the equipment body through a rigid connection; a retaining ring 6, which is installed in a reserved annular groove of the transmission shaft 2 and is used to prevent the transmission shaft 2 from axially sliding in the self-lubricating bearing 4; a shaft end retaining ring 5, which is located on one side of the retaining ring 6 and is used to further lock the transmission shaft 2; the bearing end cover 3, which is connected to the motor 8 through a fastener 7 and is used to fix the self-lubricating bearing 4 and support the rotating shaft; the motor 8, whose drive shaft realizes power transmission through the transmission shaft 2 and is fixed to one side of the bearing end cover 3 through the fastener 7.

[0035] In the present invention, the transmission shaft 2 is used to transmit driving force, one end of which is connected to the motor 8 through the bearing end cover 3, and the other end is fixed to the equipment body through the transmission shaft end cover 1. The self-lubricating bearing 4 is installed in the bearing end cover 3 to provide axial and radial support for the transmission shaft 2 to ensure its stability during rotation. The retaining ring 6 is installed in the reserved annular groove of the transmission shaft 2 to effectively prevent the axial sliding of the transmission shaft 2 in the self-lubricating bearing 4. The shaft end retaining ring 5 is located on one side of the retaining ring 6, which can further lock the transmission shaft 2 to prevent it from axial displacement during operation. The bearing end cover 3 is connected to the motor 8 through the fastener 7 to stably support the self-lubricating bearing 4 to ensure the smooth operation of the entire device. Therefore, through the precise matching of various components, the efficient and stable movement of the transmission shaft 2 is achieved, the separation problem of the transmission shaft 2 and the motor 8 is effectively avoided, the risk of equipment failure is reduced, and the hoisting efficiency and safety of the folding arm crane in the tunnel are improved.

[0036] The fastener 7 includes a plurality of bolts for connecting the bearing end cover 3 and the motor 8, and the bolts are hexagon socket bolts.

[0037] In the present invention, the fastener 7 includes a plurality of hexagon socket bolts, which are used to connect the bearing end cover 3 and the motor 8 to ensure a stable connection between the two. By providing a mechanical fixing force, the motor 8 and the bearing end cover 3 are ensured not to loosen during operation, thereby ensuring the stability of the self-lubricating bearing 4, avoiding failures or performance degradation caused by loose components, and improving the reliability and working efficiency of the entire rotating system.

[0038] The self-lubricating bearing 4 is a stepped cylindrical structure, comprising a small cylinder and a large cylinder, wherein the central openings of the small cylinder and the large cylinder have the same aperture, and the aperture matches the outer diameter of the transmission shaft 2 .

[0039] In the present invention, the central openings of the small cylinder and the large cylinder have the same aperture, and the aperture matches the outer diameter of the transmission shaft 2. This ensures that the self-lubricating bearing 4 can provide uniform axial and radial support during the rotation of the transmission shaft 2, reduces friction and wear, and improves the service life and working stability of the self-lubricating bearing 4. At the same time, the structure ensures that the transmission shaft 2 runs smoothly during the rotation process by accurately matching the outer diameter of the transmission shaft 2, avoiding vibration or axial deviation caused by mismatching, thereby improving the reliability and efficiency of the entire system.

[0040] The transmission shaft end cover 1 is an integral structure and is made of one of carbon steel or alloy steel.

[0041] In the present invention, the transmission shaft end cover 1 is made of one of carbon steel or alloy steel to ensure that it has sufficient strength and durability. The use of carbon steel or alloy steel enables the transmission shaft end cover 1 to withstand large torque and tension under high load, and at the same time has good corrosion resistance and fatigue life, and is adapted to the harsh conditions in the working environment of the knuckle boom crane in the tunnel. The stability and reliability of the transmission shaft end cover 1 are effectively improved, and the safety of the equipment in long-term and efficient operation is guaranteed.

[0042] The shaft end retaining ring 5 is in the shape of a circular ring, the inner diameter of which is the same as the outer diameter of the transmission shaft 2 , and the outer diameter of which is the same as the outer diameter of the small cylinder of the self-lubricating bearing 4 .

[0043] In the present invention, the shaft end retaining ring 5 is annular, and its inner diameter is the same as the outer diameter of the transmission shaft 2, and its outer diameter is the same as the outer diameter of the small cylinder of the self-lubricating bearing 4. This design ensures that the shaft end retaining ring 5 can accurately cooperate with the transmission shaft 2 and the self-lubricating bearing 4 to prevent the transmission shaft 2 from axial displacement during rotation. By closely cooperating with the transmission shaft 2 and the self-lubricating bearing 4, the shaft end retaining ring 5 provides additional axial support, effectively enhances the stability of the transmission shaft 2, avoids damage caused by axial displacement or sliding, and ensures efficient and smooth operation of the entire rotating system.

[0044] The circlip washer 6 is Ω-shaped, and its inner diameter is the same as the outer diameter of the reserved annular groove of the transmission shaft 2 , and its outer diameter is larger than the outer diameter of the transmission shaft 2 but smaller than the outer diameter of the shaft end retaining ring 5 .

[0045] In the present invention, by installing the circlip washer 6 in the annular groove of the transmission shaft 2, the axial sliding of the transmission shaft 2 in the self-lubricating bearing 4 can be effectively prevented. At the same time, the outer diameter of the circlip washer 6 is larger than the outer diameter of the transmission shaft 2, but smaller than the outer diameter of the shaft end retaining ring 5, so that it can be firmly fixed on the transmission shaft 2 and form a close fit with the shaft end retaining ring 5, further enhancing the axial stability. Therefore, the circlip washer 6 effectively prevents the axial displacement of the transmission shaft 2 and ensures the smooth operation and long-term reliability of the rotating system.

[0046] The left end of the transmission shaft 2 has a polygonal cross section, the middle part has a threaded structure for adjusting the position, and the right end is provided with a flat key groove.

[0047] In the present invention, by setting the left end of the transmission shaft 2 to a polygon, the torque transmission capacity between the transmission shaft 2 and the motor 8 can be enhanced, avoiding sliding or loosening caused by rotation. The middle thread structure is used to accurately adjust the position of the transmission shaft 2 to ensure that it can reach the best working state during installation and use. The design of the flat key groove at the right end enables the transmission shaft 2 to be stably connected to the motor 8 or other driving device through the flat key, ensuring the reliability and accuracy of power transmission. The transmission shaft 2 realizes efficient and stable power transmission in the entire rotating system, ensuring the long-term stable operation of the system.

[0048] The top of the bearing end cover 3 is a cylindrical structure, the diameter of the central opening matches the large cylindrical outer diameter of the self-lubricating bearing 4, and a stepped groove is provided at the bottom for matching with the self-lubricating bearing 4.

[0049] In the present invention, the top of the bearing end cover 3 is a cylindrical structure, the aperture of the central opening matches the large cylindrical outer diameter of the self-lubricating bearing 4, and a stepped groove is provided at the bottom for matching with the self-lubricating bearing 4. This ensures that the bearing end cover 3 can stably support the self-lubricating bearing 4 and provide precise positioning. The aperture of the central opening matches the large cylindrical outer diameter of the self-lubricating bearing 4, so that the self-lubricating bearing 4 can be tightly installed in the bearing end cover 3, thereby avoiding friction and wear caused by looseness or misalignment. The stepped groove at the bottom matches the shape of the self-lubricating bearing 4, so that it can provide better centering and support during the installation process, further enhancing the stability of the rotating system and ensuring the smooth operation of the transmission shaft 2.

[0050] Working principle: When in use, that is, when installing the anti-pullout rotating shaft and the slewing mechanism combined structure of the folding arm crane, first connect the transmission shaft end cover 1 with one end of the transmission shaft 2, and then insert the self-lubricating bearing 4 into the bearing end cover 3, and rivet the two with four hexagon socket bolts, and then insert the right side of the transmission shaft 2 into the reserved hole of the self-lubricating bearing 4, fix the shaft end retaining ring 5 on the right side of the transmission shaft 2, and fix the retaining ring washer 6 in the reserved groove on the right side of the transmission shaft 2, and finally put the flat key into the reserved groove of the drive shaft of the drive motor 8, insert the drive shaft of the drive motor 8 into the reserved hole on the right side of the transmission shaft 2, and use the hexagon socket bolts to rivet the drive motor 8 to the bearing end cover 3.

[0051] Moreover, the transmission shaft end cover 1, the transmission shaft 2, the bearing end cover 3, the self-lubricating bearing 4, the motor 8 and the flat key are made of 50# steel, and the shaft end retaining ring 5, the retaining ring 6 and the fastener 7 are made of 40Cr;

[0052] By using No. 50 steel, the rotating shaft has good strength and wear resistance, can effectively withstand large loads and high wear during long-term operation, and ensure the stability and reliability of the folding arm crane when working under heavy loads. The shaft end retaining ring 5, the retaining ring washer 6, and the fastener 7 are made of 40Cr steel. 40Cr steel has high strength, good toughness and fatigue resistance, which can effectively enhance the durability of these components and prevent damage or fatigue failure caused by long-term work. Through this reasonable material combination, not only the load-bearing capacity of the entire system is improved, but also the safety and durability of the equipment in a high-intensity use environment are ensured.

[0053] Embodiment 2:

[0054] Based on Example 1, the transmission shaft end cover 1, the transmission shaft 2, the bearing end cover 3, the self-lubricating bearing 4, the motor 8 and the flat key can be made of 42CrMo, and the shaft end retaining ring 5, the retaining ring washer 6 and the fastener 7 can be made of 35CrMo, which can improve the overall strength of the folding arm crane, enable the folding arm crane to withstand a larger load, and facilitate the lifting of high-quality and large-volume materials;

[0055] It can also significantly improve the overall strength of the folding arm crane, ensuring that each component maintains sufficient torsional and tensile resistance under high-load working conditions, so that the folding arm crane can withstand greater loads and improve the safety and stability of lifting operations. In addition, the use of 42CrMo and 35CrMo steels helps to enhance the durability of the equipment, reduce maintenance costs caused by wear or fatigue damage, and improve the crane's ability to lift high-quality, large-volume materials under high loads.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined structure of an anti-pulling rotating shaft and a slewing mechanism for a knuckle boom crane in a tunnel, characterized in that: The rotating shaft comprises: A transmission shaft (2) is used to transmit driving force, one end of which is connected to the motor (8) through a bearing end cover (3); A self-lubricating bearing (4) installed in the bearing end cover (3) and used to provide axial and radial support for the transmission shaft (2); A transmission shaft end cover (1), which is mounted on the other end of the transmission shaft (2), is used to limit the axial displacement of the transmission shaft (2), and is fixed to the device body through a rigid connection; A retaining ring washer (6) is installed in a reserved annular groove of the transmission shaft (2) and is used to prevent the transmission shaft (2) from axially sliding in the self-lubricating bearing (4); A shaft end retaining ring (5), which is located on one side of the retaining ring washer (6) and is used to further lock the transmission shaft (2); A bearing end cover (3) connected to the motor (8) via a fastener (7) and used to fix the self-lubricating bearing (4) and support the rotating shaft; The motor (8) has a drive shaft that transmits power through a transmission shaft (2) and is fixed to one side of a bearing end cover (3) through a fastener (7).

2. The anti-pulling rotating shaft and slewing mechanism combined structure of a folding arm crane in a tunnel according to claim 1, characterized in that: The fastener (7) comprises a plurality of bolts for connecting the bearing end cover (3) and the motor (8), and the bolts are hexagon socket bolts.

3. The anti-pulling rotating shaft and slewing mechanism combined structure of a folding arm crane in a tunnel according to claim 1, characterized in that: The self-lubricating bearing (4) is a stepped cylindrical structure, comprising a small cylinder and a large cylinder, wherein the central openings of the small cylinder and the large cylinder have the same aperture, and the aperture matches the outer diameter of the transmission shaft (2).

4. The anti-pulling rotating shaft and slewing mechanism combined structure of a knuckle boom crane in a tunnel according to claim 1, characterized in that: The transmission shaft end cover (1) is an integral structure and is made of one of carbon steel and alloy steel.

5. The anti-pulling rotating shaft and slewing mechanism combined structure of a folding arm crane in a tunnel according to claim 3, characterized in that: The shaft end retaining ring (5) is in the form of a circular ring, the inner diameter of which is the same as the outer diameter of the transmission shaft (2), and the outer diameter of which is the same as the outer diameter of the small cylinder of the self-lubricating bearing (4).

6. The anti-pulling rotating shaft and slewing mechanism combined structure of a folding arm crane in a tunnel according to claim 1, characterized in that: The retaining spring washer (6) is Ω-shaped, and its inner diameter is the same as the outer diameter of the reserved annular groove of the transmission shaft (2), and its outer diameter is larger than the outer diameter of the transmission shaft (2) but smaller than the outer diameter of the shaft end retaining ring (5).

7. The anti-pulling rotating shaft and slewing mechanism combined structure of a knuckle boom crane in a tunnel according to claim 1, characterized in that: The left end of the transmission shaft (2) has a polygonal cross section, the middle part has a threaded structure for adjusting the position, and the right end is provided with a flat key groove.

8. The anti-pulling rotating shaft and slewing mechanism combined structure of a knuckle boom crane in a tunnel according to claim 3, characterized in that: The top of the bearing end cover (3) is a cylindrical structure, the diameter of the central opening matches the large cylindrical outer diameter of the self-lubricating bearing (4), and the bottom is provided with a stepped groove for matching with the self-lubricating bearing (4).

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