A low-speed end brake system for a hoisting machine drum

Abstract

The utility model relates to a hoisting machinery drum low -speed end braking system, its structure includes: drum, the output end of drum axle is installed on first support, planetary gear speed -up mechanism, the planetary carrier of planetary gear speed -up mechanism is connected with the output end of drum axle coaxially, is used for promoting the low -speed of drum axle to be high -speed and is exported through sun wheel axle, brake wheel / disc, set up on sun wheel axle, rotates with sun wheel axle synchronously, second support is used for fixed mounting high -speed brake, high -speed brake, set up on second support, cooperate installation with brake wheel / disc, is used for with brake wheel / disc friction produces brake torque and acts on drum after planetary gear speed -up mechanism, realizes the brake of hoisting machinery drum low -speed end, the utility model discloses through the speed -up effect of speed -up mechanism, makes the brake torque needed by drum low -speed end brake to be reduced greatly, has very high cost performance, small, maintenance simple, the characteristics such as high security.

Description

Technical Field

[0001] This utility model relates to a crane braking system, specifically a low-speed end braking system for a crane drum. Background Technology

[0002] In the hoisting mechanism of lifting machinery, two independent braking systems are typically installed to ensure safety: a service brake (also known as a support brake) and a drum low-speed end brake. The service brake is usually installed at the tail of the motor (e.g., an electromagnetic disc brake) or on the high-speed shaft of the reduction mechanism, and has a relatively small braking torque. The drum low-speed end brake is directly installed on the drum or on the drum's brake disc, and is used to reliably brake the load in emergency situations (such as transmission system damage or hoisting mechanism failure).

[0003] Currently, the brakes installed at the low-speed end of the transmission system drum in the hoisting machinery industry have the following disadvantages: First, the braking torque is huge. Because the drum is at the lowest speed end of the transmission system, the speed is low and the torque is high, the braking torque required for the brake to directly stop the drum is very large. Second, the brake structure is large and cumbersome. The huge braking torque results in the brake body being large in size and weight, and the cost is very high. Third, the installation space is limited. It is difficult to arrange the huge brake in the compact hoisting mechanism, and sometimes it is necessary to specially lengthen the drum shaft or design a complex support structure. Fourth, maintenance is inconvenient. The inspection and replacement of brake pads and other maintenance work of large brakes are labor-intensive.

[0004] Therefore, the low-speed end of the transmission system drum in the hoisting machinery industry urgently needs a braking solution that can both guarantee the braking function and compensate for the above-mentioned shortcomings. Utility Model Content

[0005] The purpose of this utility model is to provide a low-speed end braking system for crane drums to solve the problems of large braking torque and large size of existing low-speed end brakes in the transmission system of crane machinery.

[0006] This utility model is implemented as follows: a low-speed end braking system for a hoisting machinery drum, comprising: A drum, with a drum shaft disposed at the axis of the drum, and the output end of the drum shaft mounted on a first bracket; A planetary gear speed-increasing mechanism, wherein the planet carrier of the planetary gear speed-increasing mechanism is coaxially connected to the output end of the drum shaft, and is used to increase the low speed of the drum shaft to a high speed and output it through the sun gear shaft; A brake wheel / disc is mounted on the sun gear shaft and rotates synchronously with the sun gear shaft; The second bracket is used to securely mount the high-speed brake. A high-speed brake is mounted on the second bracket and is installed in conjunction with the brake wheel / disc. It is used to generate braking torque through friction with the brake wheel / disc, which is then applied to the drum via the planetary gear speed-increasing mechanism to achieve braking of the low-speed end of the crane drum.

[0007] As a further improvement of this utility model, a mounting plate is provided at the output end of the drum shaft, and a flange is provided on the planetary carrier. The mounting plate is coaxial with the drum shaft, and the flange of the planetary carrier is connected to the mounting plate by bolts.

[0008] As a further improvement of this utility model, a stop mating surface is provided between the flange of the planetary carrier and the mounting plate.

[0009] As a further improvement of this utility model, a bushing is provided at the center of the brake wheel / disc, the bushing is sleeved on the sun gear shaft, and the bushing and the sun gear shaft are connected by a key.

[0010] As a further improvement of this utility model, the end of the sun gear shaft is provided with an external thread and a fixing nut is threadedly connected to it.

[0011] As a further improvement of this utility model, a shaft retaining ring is provided at the end of the sun gear shaft.

[0012] As a further improvement of this utility model, the high-speed brake is a normally closed mechanical brake.

[0013] As a further improvement of this utility model, the high-speed brake is a drum brake, a boom disc brake, a direct-pressure drum brake, or an electromagnetic disc brake.

[0014] As a further improvement of this utility model, it also includes a platform, on which both the first support and the second support are disposed.

[0015] This invention incorporates a speed-increasing mechanism connected in series at the low-speed end of a crane drum. This mechanism converts the drum's low speed to a high speed, which is then transmitted to a high-speed brake located at the output end of the speed-increasing mechanism. Through the speed-increasing action of the mechanism, the braking torque required by the low-speed end brake is significantly reduced. This allows for the use of a compact and cost-effective brake to achieve the same or even better braking effect at the low speed end. This solution is particularly suitable for applications requiring highly reliable and safe braking, such as crane machinery and mining machinery.

[0016] This invention employs a planetary gear speed-increasing mechanism, which is small in size and has its input and output directions coaxial with the drum, resulting in a compact structure for the entire low-speed braking system. The transmission components are located within the housing of the planetary gear speed-increasing mechanism, avoiding the influence of dust and other environmental factors in the working environment, thus ensuring the stability and service life of the low-speed braking system. The planetary gear speed-increasing mechanism has a high transmission ratio, effectively reducing the braking torque of the low-speed brake on the drum.

[0017] This invention implements a low-speed end braking function for crane drums, which can be applied to the hoisting mechanism of cranes to prevent special accidents caused by damage to the drive device (including motor, working brake, transmission shaft, and reduction mechanism) of the hoisting mechanism. Compared with existing low-speed end brakes for drums, it has the characteristics of extremely high cost performance, small size, simple maintenance, and high safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the utility model used for the low-speed end of a lifting machinery drum.

[0019] Figure 2 This is a structural diagram showing the connection between the planetary gear speed-increasing mechanism of this utility model and the drum and brake wheel / disc.

[0020] Figure 3 This is a structural diagram of the drum brake used in this utility model.

[0021] Figure 4 yes Figure 3 Side view.

[0022] Figure 5 This is a structural diagram of the wall-mounted disc brake used in this utility model.

[0023] Figure 6 yes Figure 5 Side view.

[0024] Figure 7 This is a structural diagram of the direct-pressure drum brake used in this utility model.

[0025] Figure 8 yes Figure 7 Side view.

[0026] Figure 9 This is a structural diagram of the electromagnetic disc brake used in this utility model.

[0027] Figure 10 yes Figure 9 Side view.

[0028] In the diagram: 1. Planetary gear speed-increasing mechanism; 2. High-speed brake; 3. Brake wheel; 4. Electric motor; 5. Working brake; 6. Drive shaft; 7. Reduction mechanism; 8. Drum; 9. Brake disc; 10. First support; 11. Second support; 12. Drum shaft; 13. Mounting disc; 14. Platform; 15. Fixing nut; 16. Friction disc; 17. Bushing; 18. Shaft retaining circlip. 101. Sun gear axle; 102. Planet carrier; 201. Drum brake; 202. Arm disc brake; 203. Direct pressure drum brake; 204. Electromagnetic disc brake. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example 1

[0031] This embodiment is a low-speed end braking system for a hoisting machinery drum 8, whose structure mainly includes a drum 8, a planetary gear speed-increasing mechanism 1, a brake wheel / disc, and a high-speed brake 2.

[0032] like Figure 1 , Figure 2 As shown, the drum 8 of the lifting machinery is mounted on the platform 14, and the motor 4 is installed on the platform 14. The motor 4 is connected to the input shaft of the reduction mechanism 7 through the transmission shaft 6. At least one working brake 5 is installed on the transmission shaft 6. One end of the drum 8 is connected to the output end of the reduction mechanism 7, and the other end is equipped with the low-speed end braking system of this utility model.

[0033] A drum shaft 12 is provided at the center of the drum 8. The drum shaft 12 extends to both ends of the drum 8. One end of the drum shaft 12 is connected to the reduction mechanism 7 via a coupling, and the other end serves as the output end. The output end is mounted on the first bracket 10 via a bearing. The first bracket 10 is fixedly mounted on the platform 14. The output end of the drum shaft 12 is used to mount the planetary gear speed-increasing mechanism 1.

[0034] The planetary gear speed-increasing mechanism 1 can be a commercially available planetary gear speed-increasing device. Its planet carrier 102 and sun gear shaft 101 serve as the input and output components, respectively. The planet carrier 102 of the planetary gear speed-increasing mechanism 1 is coaxially connected to the output end of the drum shaft 12, used to increase the low speed of the drum shaft 12 to a high speed and output it through the sun gear shaft 101. A brake wheel / disc is provided on the sun gear shaft 101. By converting the low speed of the drum 8 at its low speed end to a high speed through the planetary gear speed-increasing mechanism 1, the braking torque required at the low speed end of the drum 8 is significantly reduced through the speed-increasing effect, thereby reducing the requirements for the brake. This allows for the use of a low-cost brake to achieve the same or even better braking effect.

[0035] The planetary gear speed-increasing mechanism 1 is small in size, and its input and output directions are coaxial with the drum 8, making the entire low-speed braking system compact. The transmission components are located inside the housing of the planetary gear speed-increasing mechanism 1, which avoids the influence of dust and other environmental factors in the working environment, ensuring the stability and service life of the low-speed braking system. The planetary gear speed-increasing mechanism 1 has a high transmission ratio, which can effectively reduce the braking torque of the low-speed brake of the drum 8.

[0036] The second bracket 11 is fixedly mounted on the platform 14. The high-speed brake 2 is mounted on the second bracket 11. The position of the high-speed brake 2 is fixed by the second bracket 11 and its center is coaxial with the sun gear shaft 101 of the planetary gear speed-increasing mechanism 1.

[0037] The high-speed brake 2 adopts several conventional brake structures currently on the market. It generates braking torque through friction with the brake wheel / disc, which is then applied to the drum 8 via the planetary gear speed-increasing mechanism 1, thereby achieving braking of the low-speed end of the crane machinery drum 8.

[0038] The high-speed brake 2 is a normally closed mechanical brake. When the crane is working normally, the high-speed brake 2 remains open; when the crane's transmission system is damaged or the hoisting mechanism fails, the working brake 5 cannot stop the load, the high-speed brake 2 is triggered, clamping the brake wheel / disc, and the planetary gear speed increaser converts the small braking torque of the high-speed brake 2 into a large torque and transmits it to the drum shaft 12, realizing the braking function of the low-speed end of the crane drum 8.

[0039] The triggering of the low-speed end brake of drum 8 is existing technology and will not be described in detail here.

[0040] To facilitate installation, a mounting plate 13 is provided at the output end of the drum shaft 12, and a flange is provided on the planetary carrier 102. The mounting plate 13 is coaxial with the drum shaft 12, and the flange of the planetary carrier 102 is connected to the mounting plate 13 by bolts to achieve torque transmission.

[0041] A stop mating surface is provided between the flange of the planetary carrier 102 and the mounting plate 13 to achieve axial and radial positioning.

[0042] A bushing 17 is provided at the center of the brake wheel / disc. The bushing 17 is fitted onto the sun gear shaft 101. The bushing 17 is axially and radially positioned by the shaft and the shoulder. The bushing 17 and the sun gear shaft 101 are connected by a key, and torque is transmitted through the key.

[0043] For the end of the sun gear shaft 101, an external thread can be provided at the end of the sun gear shaft and a fixing nut 15 can be threadedly connected, or a shaft retainer 18 can be provided at the end of the sun gear shaft 101, and the brake wheel / disc can be axially fixed by the fixing nut 15 or the shaft retainer 18 in conjunction with the shaft shoulder.

[0044] The high-speed brake 2 and the second bracket 11 are connected by fixing screws, and the second bracket 11 and the platform 14 can be connected by screws or welding. Example 2

[0045] like Figure 3 , Figure 4 As shown, a drum brake 201 is used in this embodiment. The sun gear shaft 101 and the brake wheel 3 are axially and radially positioned by the shaft and the shaft shoulder. The brake wheel 3 is fixed by the fixing nut 15 to prevent axial movement of the brake wheel 3. Torque is transmitted by the key. The drum brake 201 is fixedly mounted on the platform 14 by the second bracket 11. Other structures are the same as in Embodiment 1.

[0046] When the crane is working normally, the drum brake 201 remains open; when the crane's transmission system is damaged or the hoisting mechanism fails, the working brake 5 cannot stop the load, the drum brake 201 is triggered, clamping the brake wheel 3, and the planetary gear speed-increasing mechanism 1 converts the small braking torque of the high-speed brake 2 into a large torque and transmits it to the drum shaft 12, thereby realizing the braking function of the low-speed end of the crane drum 8. Example 3

[0047] like Figure 5 , Figure 6 As shown, this embodiment employs a disc brake 202. The sun gear shaft 101 and the brake disc 9 are axially and radially positioned via the shaft and shaft shoulder. The brake wheel 3 is fixed by the fixing nut 15 to prevent axial movement of the brake disc 9. Torque is transmitted via a key. The disc brake 202 is fixedly mounted on the platform 14 via the second bracket 11. Other structures are the same as in Embodiment 1.

[0048] When the crane is working normally, the boom disc brake 202 remains open; when the crane's transmission system is damaged or the hoisting mechanism fails, the working brake 5 cannot stop the load, the boom disc brake 202 is triggered, clamping the brake disc 9, and the planetary gear speed-increasing mechanism 1 converts the small braking torque of the high-speed brake 2 into a large torque and transmits it to the drum shaft 12, thereby realizing the low-speed end braking function of the crane drum 8. Example 4

[0049] like Figure 7 , Figure 8 As shown, a direct-pressure drum brake 203 is used in this embodiment. The sun gear shaft 101 and the brake disc 9 are axially and radially positioned by the shaft and shaft shoulder. The brake wheel 3 is fixed by the fixing nut 15 to prevent axial movement of the brake wheel 3. Torque is transmitted by a key. The direct-pressure drum brake 203 is fixed to the second bracket 11 by fixing screws. The second bracket 11 is welded to the platform 14. Other structures are the same as in Embodiment 1.

[0050] When the crane is working normally, the direct pressure drum brake 203 remains open; when the crane's transmission system is damaged or the hoisting mechanism fails, the working brake 5 cannot stop the load, the direct pressure drum brake 203 is triggered, clamping the brake wheel 3, and the planetary gear speed-increasing mechanism 1 converts the small braking torque of the high-speed brake 2 into a large torque and transmits it to the drum shaft 12, thereby realizing the low-speed end braking function of the crane drum 8. Example 5

[0051] like Figure 9 , Figure 10 As shown, this embodiment employs an electromagnetic disc brake 204. The sun gear shaft 101 and the bushing 17 of the friction disc 16 are axially and radially positioned via the shaft and shoulder. A circlip 18 secures the bushing 17 of the friction disc 16 to prevent axial movement of the brake wheel 3. Torque is transmitted via a spline. The electromagnetic disc brake 204 is fixed to a second bracket 11, which in turn is fixed to a platform 14. Other structures are the same as in Embodiment 1.

[0052] When the crane is working normally, the electromagnetic disc brake 204 remains open; when the crane's transmission system is damaged or the hoisting mechanism fails, the working brake 5 cannot stop the load, the electromagnetic disc brake 204 is triggered, clamping the friction disc 16, and the planetary gear speed-increasing mechanism 1 converts the small braking torque of the high-speed brake 2 into a large torque and transmits it to the drum shaft 12, thereby realizing the low-speed end braking function of the crane drum 8.

[0053] This invention implements a low-speed end braking function for the hoisting drum 8, which can be applied to the hoisting mechanism of cranes to prevent special accidents caused by damage to the drive device of the hoisting mechanism (including the motor 4, working brake 5, transmission shaft 6, and reduction mechanism 7). It features extremely high cost-effectiveness, small size, simple maintenance, and high safety.

[0054] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A low-speed end braking system for a hoisting machinery drum, characterized in that, include: A drum, with a drum shaft disposed at the axis of the drum, and the output end of the drum shaft mounted on a first bracket; A planetary gear speed-increasing mechanism, wherein the planet carrier of the planetary gear speed-increasing mechanism is coaxially connected to the output end of the drum shaft, and is used to increase the low speed of the drum shaft to a high speed and output it through the sun gear shaft; A brake wheel / disc is mounted on the sun gear shaft and rotates synchronously with the sun gear shaft; The second bracket is used to securely mount the high-speed brake. A high-speed brake is mounted on the second bracket and is installed in conjunction with the brake wheel / disc. It is used to generate braking torque through friction with the brake wheel / disc, which is then applied to the drum via the planetary gear speed-increasing mechanism to achieve braking of the low-speed end of the crane drum.

2. The low-speed end braking system of the hoisting machinery drum according to claim 1, characterized in that, A mounting plate is provided at the output end of the drum shaft, and a flange is provided on the planetary carrier. The mounting plate is coaxial with the drum shaft, and the flange of the planetary carrier is connected to the mounting plate by bolts.

3. The low-speed end braking system of the hoisting machinery drum according to claim 2, characterized in that, A stop mating surface is provided between the flange of the planetary carrier and the mounting plate.

4. The low-speed end braking system of the hoisting machinery drum according to claim 1, characterized in that, A bushing is provided at the center of the brake wheel / disc, and the bushing is sleeved on the sun gear shaft. The bushing and the sun gear shaft are connected by a key.

5. The low-speed end braking system of the hoisting machinery drum according to claim 4, characterized in that, The end of the sun gear shaft is provided with an external thread and is threadedly connected to a fixing nut.

6. The low-speed end braking system of the hoisting machinery drum according to claim 4, characterized in that, A retaining ring is provided at the end of the sun gear shaft.

7. The low-speed end braking system of the hoisting machinery drum according to claim 1, characterized in that, The high-speed brake is a normally closed mechanical brake.

8. The low-speed end braking system of the hoisting machinery drum according to claim 7, characterized in that, The high-speed brake is a drum brake, a boom disc brake, a direct-pressure drum brake, or an electromagnetic disc brake.

9. The low-speed end braking system of the hoisting machinery drum according to claim 1, characterized in that, It also includes a platform, on which both the first support and the second support are mounted.

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