Ultra-high torque split shaft connecting structure

Abstract

This invention relates to the field of mechanical transmission and connection structure technology, specifically to an ultra-high torque split-shaft connection structure. It is used to transmit pressure provided by a hydraulic system to the grinding roller through a high-torque split-shaft coupling, ultimately converting it into grinding force on the material bed. It includes a rocker arm, a shaft, and a hub; the rocker arm and shaft are connected, and the shaft and hub are connected by a toothed structure. This application improves the shape and structure of the rocker arm casting by eliminating the expansion sleeve structure, reducing the manufacturing difficulty of the component, and improving the product's high-efficiency torque transmission.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission and connection structure technology, specifically to an ultra-high torque split shaft connection structure, which is particularly suitable for applications requiring high-reliability torque transmission, such as heavy machinery, mining machinery, wind turbine generators, large ship propulsion systems, and oil drilling platforms. Background Technology

[0002] Vertical roller mills are large, critical pieces of equipment widely used in grinding operations in industries such as cement, mining, and power. During operation, the grinding rollers apply enormous grinding pressure to the material. This pressure is transmitted to the rocker arms via hydraulic cylinders and ultimately falls onto the grinding rollers. Therefore, the effective transmission of ultra-high torque is crucial for the efficient operation of the entire machine.

[0003] The traditional vertical mill rocker arm column currently has the following main shortcomings: 1. High scrap rate in rocker arm casting The vertical mill rocker arm fork has a complex structure with significant variations in wall thickness, making it prone to shrinkage porosity and other defects during casting due to concentrated heat. Localized stress concentration in the rocker arm increases the tendency for hot cracking, and difficulties in sand core positioning lead to dimensional deviations and misalignment. Furthermore, the material is sensitive to cooling rates, with thicker sections exhibiting coarse microstructures and unstable mechanical properties. These combined factors result in a significantly higher scrap rate compared to conventional structures, increasing manufacturing costs and extending production time.

[0004] 2. Difficult to disassemble and maintain, and long repair cycle. The original design featured an interference fit between the tapered pin and the tapered sleeve, requiring specialized hydraulic tools or a heating device for disassembly. This made operation difficult and time-consuming in harsh environments. Replacing worn tapered pins or sleeves necessitated disassembling the entire rocker arm assembly, resulting in significant workload, prolonged downtime for maintenance, and reduced production efficiency.

[0005] 3. Inadequacy of the expansion sleeve connection The axial space requirement is large. The expansion sleeve requires a relatively long axial installation length, which limits the design of a compact structure.

[0006] Disassembly and assembly are difficult. The expansion sleeve is disassembled and assembled with the assistance of high-pressure oil, which is complicated and requires special tools, resulting in high maintenance costs.

[0007] Torque transmission stability is affected by temperature. The expansion sleeve relies on friction to transmit force. Under high temperature or alternating load, the friction coefficient changes, which may lead to a decrease in torque transmission capability. Summary of the Invention

[0008] In response to the aforementioned technical background, this invention designs a new ultra-high torque split-shaft connection structure. By eliminating the expansion sleeve structure, the external shape of the rocker arm casting is improved, reducing the manufacturing difficulty of the component and improving the product's high-efficiency torque transmission efficiency. Technical solution

[0009] To achieve the above-mentioned technical objectives, the present invention provides the following technical solution.

[0010] It includes a rocker arm, gasket, shaft, rocker arm connecting bolt, locking gasket, positioning screw, left bearing cover, bearing, right bearing cover, cover connecting bolt, cover flat washer, left steel strip, right steel strip, connecting bolt, connecting nut, hub, long connecting bolt, washer ring, large gasket, sealing air inlet pipe, connecting screw, connecting gasket, large gasket connecting screw, large gasket connecting flat washer, pin assembly, right positioning ring, spacer sleeve, left positioning ring, and end cap.

[0011] Furthermore, the loading force of the hydraulic cylinder is transmitted to the grinding roller through the rocker arm, and the grinding roller grinds the material on the material layer to achieve the grinding effect.

[0012] Furthermore, the shaft and rocker arm are connected by rocker arm connecting bolts and locking washers. Washers are installed between the rocker arm and the shaft, and the washers are coated with a special coating to increase the static friction coefficient of the mechanical parts and improve the friction force of the connection structure during operation.

[0013] Furthermore, the positioning screws are installed first before connecting the rocker arm and the shaft, serving to position both.

[0014] Furthermore, the left and right bearing covers are fixed to the bearing housing by cover connecting bolts and cover flat washers.

[0015] Furthermore, the bearing is installed between the left and right bearing caps. A high-torque split-shaft connection structure has bearings at both ends; the right-side bearing is a floating bearing, allowing for slight axial movement during operation. The left-side bearing is a fixed bearing.

[0016] Furthermore, the left steel belt, right steel belt, and upper part of the hub are connected using connecting bolts, locking washers, and connecting nuts.

[0017] Furthermore, the locking washer needs to be installed using a special torque wrench to achieve the set torque requirement.

[0018] Furthermore, long connecting bolts and locking washers connect the shaft and the hub.

[0019] Furthermore, the washer ring is connected to the wheel hub by a long connecting bolt, which locks the washer in place and improves torque transmission.

[0020] Furthermore, the sealing air inlet pipe is connected to the external sealing air duct, and the sealing air enters the rocker arm cavity through the sealing air inlet pipe to protect the grinding roller bearing.

[0021] Furthermore, one side of the large gasket is connected to the connecting sealing air inlet pipe via a connecting screw, while the other side is connected to the wheel hub via a large gasket connecting screw and a large gasket flat washer.

[0022] Furthermore, the pin assembly, connecting the hub, the left steel belt, and the lower part of the right steel belt, is a key component for transmitting the applied force. The hydraulic cylinder transmits the applied force to the shaft via the left and right steel belts, and finally to the grinding roller shaft via the rocker arm.

[0023] Furthermore, the left end bearing installed in the ultra-high torque split shaft connection structure is axially limited by the right positioning ring and the spacer sleeve, and the left positioning ring radially limits the spacer sleeve to fix the left end bearing.

[0024] Furthermore, the end cap is connected to the screw via a large washer, and the large washer is fixed to the wheel hub via a flat washer. An ultra-high torque connection structure uses an end cap to seal the left end, preventing air from leaking out.

[0025] Compared with the prior art, the present invention has the following outstanding advantages: (1) Ultra-high torque split shaft connection structure for stable and reliable torque transmission: The rocker arm and hub are connected by a toothed structure, which efficiently transmits torque while the 180 teeth in the circumferential direction allow the rocker arm angle to be adjusted in 2° units.

[0026] (2) The ultra-high torque split shaft connection structure is easy and accurate to install: the locking nut is specially designed, and the torque is recorded by a drive torque wrench to achieve precise torque control.

[0027] (3) Low scrap rate of ultra-high torque split shaft connection structure parts: The gear structure uses forged gears, which has a low scrap rate and better economic benefits compared with integral casting.

[0028] In summary, this invention employs a toothed structure to connect the rocker arm and the hub, enabling ultra-high torque transmission and rocker arm angle adjustment, improving torque transmission stability, facilitating installation, and achieving high precision. Furthermore, the toothed structure uses forged components, resulting in a lower scrap rate and better economic benefits. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a simplified diagram of the torque transmission force of the present invention; Figure 3 This is the main structure of the present invention; Figure 4 This is the toothed connection structure of the present invention; The components include: rocker arm 1, gasket 2, shaft 3, rocker arm connecting bolt 4, locking gasket 5, positioning screw 6, bearing left cover 7, bearing 8, bearing right cover 9, cover connecting bolt 10, cover flat washer 11, left steel strip 12, right steel strip 13, connecting bolt 14, connecting nut 15, hub 16, long connecting bolt 17, washer ring 18, large gasket 19, sealing air inlet pipe 20, connecting screw 21, connecting gasket 22, large gasket connecting screw 23, large gasket connecting flat washer 24, pin assembly 25, right positioning ring 26, spacer sleeve 27, left positioning ring 28, end cap 29, connecting rod head 30, grinding roller shaft 31, roller sleeve 32, hydraulic cylinder loading force F1, and grinding force on the grinding roller F2. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] like Figure 1 As shown, the rocker arm is connected to shafts at both ends. The shafts and rocker arm are positioned by positioning screws and connected by rocker arm connecting bolts and locking washers. Washers with special coatings, such as f-CER coating, are installed between the rocker arm and shafts to effectively increase the static friction coefficient of the mechanical parts and improve the friction force during operation. Bearings are installed at both ends of the high-torque split-shaft connection structure. The left and right bearing covers are fixed to the bearing seats by cover connecting bolts and cover flat washers, protecting the bearings from external environmental contamination. The bearings at both ends have different functions. The right-side bearing is a floating bearing, allowing slight axial movement during operation. The left-side bearing is a fixed bearing, axially limited by a right positioning ring and a spacer sleeve, while the left positioning ring radially limits the spacer sleeve, fixing the left-side bearing. During the actual operation of the vertical mill, due to material layer fluctuations, the rocker arm swings slightly up and down via the bearings. The left and right steel belts and the upper part of the hub are connected by connecting bolts and locking washers, while the lower part of the hub and the left and right steel belts are connected by a pin assembly, which better transmits the loading force of the hydraulic cylinder. The hub is connected to the shaft by long connecting bolts and locking washers. Special tools are used to install the bolts to meet the torque requirements. The hub and shaft are connected by a toothed connection, which can greatly transmit the torque from the hydraulic cylinder, simplifying the mechanical structure and increasing the transmission efficiency. Pure mechanical transmission results in higher equipment stability. The washer ring fits snugly against the locking washer and the hub, increasing the contact surface between the locking washer and the hub. One side of the large washer is connected to the connecting sealing air inlet pipe by a connecting screw, and the other side is connected to the hub by a large washer connecting screw and a large washer flat washer. Sealing air enters from the sealing air inlet, which acts as a seal for the main roller bearing. The end cap is fixed to the hub by a large washer connecting screw and a large washer flat washer, achieving port closure and preventing sealing air from flowing out from the left end.

[0032] Figure 2As shown, the hydraulic cylinder load force F1 is transmitted to the hub through the connecting rod head 30. The hub is connected to the shaft and rocker arm by long connecting bolts and locking washers. The shaft is connected to the rocker arm by rocker arm connecting bolts and locking washers. The hydraulic cylinder load force is transmitted to the rocker arm through the hub and shaft, then to the grinding roller shaft 31, and finally to the roller sleeve 32, forming a grinding force F2 on the grinding roller.

[0033] Figure 3 As shown, this illustrates the connection method of the rocker arm, shaft, and hub.

[0034] Figure 4 As shown, a toothed connection structure is used to connect the hub and shaft, improving torque transmission efficiency. The tiny teeth are perfectly bonded together, precisely transmitting torque and adjusting the angle of the rocker arm, achieving high grinding efficiency.

[0035] The structures, proportions, and sizes illustrated in the accompanying drawings of this embodiment are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed in the specification. They are not intended to limit the implementation conditions of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed in this invention. The scope of protection sought by this invention is not limited to the technical solutions provided in this embodiment; any technical solutions inspired by this embodiment fall under the protection of this invention.

Claims

1. A high-torque split-shaft connection structure, characterized in that: It includes a rocker arm (1), a shaft (3) and a hub (16); the rocker arm (1) and the shaft (3) are connected, and the shaft (3) and the hub (16) are connected by a toothed structure.

2. The ultra-high torque split-shaft connection structure as described in claim 1, characterized in that: The loading force of the hydraulic cylinder is transmitted to the grinding roller through the rocker arm (1).

3. The ultra-high torque split-shaft connection structure as described in claim 1, characterized in that: The shaft (3) is connected to the rocker arm (1) by a rocker arm connecting bolt (4) and a locking washer (5), and a washer (2) is installed between the rocker arm (1) and the shaft (3).

4. The ultra-high torque split-shaft connection structure as described in claim 1, characterized in that: A positioning screw (6) is provided between the rocker arm (1) and the shaft (3).

5. The ultra-high torque split-shaft connection structure as described in claim 1, characterized in that: include: Bearing housing, left bearing cover (7), right bearing cover (9), cover connecting bolt (10) and cover flat washer (11); the left bearing cover (7) and right bearing cover (9) are fixed to the bearing housing by cover connecting bolt (10) and cover flat washer (11).

6. The ultra-high torque split-shaft connection structure as described in claim 5, characterized in that: Includes bearing (8), which is installed between the left bearing cover (7) and the right bearing cover (9); the left and right ends of the ultra-high torque split shaft connection structure are respectively equipped with bearing (8), the right end bearing (8) is a floating end bearing, and the bearing can move slightly axially when the connection structure is running, and the left end bearing (8) is a fixed end bearing.

7. The ultra-high torque split-shaft connection structure as described in claim 1, characterized in that: Includes connecting bolts (14), connecting nuts (15), locking washers (5), left steel strip (12) and right steel strip (13); the connecting bolts (14), locking washers (5) and connecting nuts (15) are used to connect the left steel strip (12), right steel strip (13) and the upper part of the hub (16).

8. The ultra-high torque split-shaft connection structure as described in claim 7, characterized in that: The locking washer (5) is installed using a special torque wrench to achieve the set torque requirement.

9. The ultra-high torque split-shaft connection structure as described in claim 1, characterized in that: include: The long connecting bolt (17) and the locking washer (5) connect the shaft (3) and the hub (16).

10. The ultra-high torque split-shaft connection structure as described in claim 9, characterized in that: Includes a washer (18), which is connected to the hub (16) via the long connecting bolt (17) and the locking washer (5).

11. The ultra-high torque split-shaft connection structure as described in claim 1, characterized in that: It includes a sealing air inlet pipe (20), which is connected to an external sealing air pipe. The sealing air enters the cavity of the rocker arm (1) through the sealing air inlet pipe (20).

12. The ultra-high torque split-shaft connection structure as described in claim 11, characterized in that: Includes a large washer (19), a connecting screw (21), a large washer (19), a connecting washer (22), a large washer connecting screw (23), and a large washer flat washer (24). One side of the large gasket (19) is connected to the sealing air inlet pipe (20) by the connecting screw (21) and the connecting gasket (22), and the other side is connected to the hub (16) by the large gasket connecting screw (23) and the large gasket flat washer (24).

13. The ultra-high torque split-shaft connection structure as described in claim 7, characterized in that: Includes a pin assembly (25) that connects the lower part of the hub (16), the left steel belt (12) and the right steel belt (13); the hydraulic cylinder transmits the loading force to the shaft (3) through the left steel belt (12) and the right steel belt (13), and finally to the grinding roller through the rocker arm (1).

14. The ultra-high torque split-shaft connection structure as described in claim 6, characterized in that: Includes a right positioning ring (26), a spacer sleeve (27), and a left positioning ring (28); The left end bearing (8) installed in the ultra-high torque split shaft connection structure is axially limited by the right positioning ring (26) and the spacer sleeve (27), and the left positioning ring (28) radially limits the spacer sleeve (27) to fix the left end bearing (8).

15. The ultra-high torque split-shaft connection structure as described in claim 12, characterized in that: Includes an end cap (29), which is fixed to the hub (16) by the large washer connecting screw (23) and the large washer connecting flat washer (24).

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