A composite direct drive motor and beam pumping unit

Abstract

The utility model relates to oil production drive technology field, concretely relates to a kind of composite direct drive motor and beam-pumping unit;The composite direct drive motor includes: disc type permanent magnet motor and speed reducer, and parallelly set on main shaft, disc type permanent magnet motor includes shell and stator rotor, rotor sleeve is set on main shaft, stator is set on rotor, shell is set on stator;Speed reducer includes shell and one-stage speed reduction mechanism, two-stage speed reduction mechanism, shell is set on one-stage speed reduction mechanism and two-stage speed reduction mechanism, one-stage speed reduction mechanism includes by inside to outside sequentially set on main shaft one-stage sun gear and one-stage planetary gear, one-stage retainer, one-stage inner tooth ring, one-stage sun gear is connected with rotor;Instead of the transmission mode of traditional motor and belt cooperation, all shortcomings of belt drive are cancelled.Make beam-pumping unit can more accurate control the stroke of beam-pumping unit, and lower stroke operation;More accurate detection beam-pumping unit operating state, not affected by belt.

Description

Technical Field

[0001] This utility model relates to the field of oil production transmission technology, specifically to a composite direct drive motor and a walking beam pumping unit. Background Technology

[0002] A beam pumping unit, also known as a beam pumping unit or a beam-crank-balanced pumping unit, refers to a pumping unit containing a walking beam, which is reversed via a connecting rod mechanism and balanced by a crank weight; it is commonly called a nodding donkey pump. In terms of oil extraction method, it belongs to the rod-based oil production equipment category (which can be divided into two categories: rod-based and rodless oil production equipment). Current beam pumping units are driven by a motor and belt drive with a gearbox. However, the core drawbacks are that the transmission efficiency is easily affected and the maintenance frequency is relatively high, especially under long-term high-load conditions.

[0003] 1. Transmission efficiency and stability issues: slippage occurs. The transmission between the belt and pulley relies on friction. When the load exceeds the friction limit or the belt tension is insufficient, slippage will occur, directly leading to power transmission loss and reducing oil pumping efficiency. Furthermore, the transmission ratio is unstable: the elastic deformation of the belt changes with the load and cannot maintain a precise transmission ratio like gear transmission, which may affect the stability of the pumping unit's stroke rate.

[0004] 2. Belts are prone to wear and have a limited lifespan. As consumable parts, belts are exposed to the elements for extended periods, including wind, sand, rain, snow, and temperature fluctuations. They also endure alternating stress, making them susceptible to aging, cracking, and wear, typically requiring periodic replacement. Pulleys are also prone to wear. If a worn belt is not replaced promptly, its rough edges will accelerate wear on the pulley grooves, creating a vicious cycle of belt-pulley wear and increasing overall maintenance costs.

[0005] 3. The installation and maintenance requirements are high, with strict precision requirements. Improper adjustment of the pulley parallelism and alignment can lead to uneven belt stress, accelerated localized wear, and shortened service life. This places high demands on the technical skills of installation and maintenance personnel; frequent inspection and maintenance are also necessary. During daily operation, the belt tension, wear level, and pulley condition must be checked regularly. Maintenance work is time-consuming, especially in remote oilfields, increasing manpower and time costs for operation and maintenance.

[0006] 4. Poor environmental adaptability and weak resistance to harsh environments. In dusty, humid, high-temperature or low-temperature oilfield environments, the belt will age faster and the friction will fluctuate due to environmental influences, further reducing transmission reliability and increasing the probability of failure.

[0007] Therefore, a semi-direct drive motor can be used for transmission, that is, the belt drive is eliminated and the motor is directly connected to the gearbox through a coupling; however, domestic oil fields are generally in the middle and late stages of oil production, and now they are mostly doing renovations. Due to the inconsistent size of the drive shaft, each unit requires surveying and installation of the original equipment, which makes it difficult to promote on a large scale, and the semi-direct drive motor has poor adaptability. Utility Model Content

[0008] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the semi-direct drive motor in the prior art has poor adaptability because the size of the drive shaft is inconsistent, each unit requires the original equipment to be measured and installed, and it is difficult to promote it on a large scale. In order to provide a composite direct drive motor and a beam pumping unit.

[0009] To solve the above-mentioned technical problems, this utility model provides a composite direct-drive motor, comprising: a disc-type permanent magnet motor and a reducer, which are mounted side-by-side on a main shaft. The disc-type permanent magnet motor includes a housing and a stator and rotor. The rotor is mounted on the main shaft, the stator is mounted on the rotor, and the housing is mounted on the stator. The reducer includes a housing and a first-stage reduction mechanism and a second-stage reduction mechanism. The housing is mounted on the first-stage and second-stage reduction mechanisms. The first-stage reduction mechanism includes a first-stage sun gear, a first-stage planetary gear, a first-stage cage, and a first-stage internal gear ring, which are mounted sequentially from the inside to the outside on the main shaft. The first-stage sun gear is connected to the rotor. The second-stage reduction mechanism includes a second-stage sun gear, a second-stage planetary gear, a second-stage cage, and a second-stage internal gear ring, which are mounted sequentially from the inside to the outside on the main shaft. The second-stage sun gear is connected to the first-stage cage. A flat key is provided on the second-stage cage, and the flat key is connected to the main shaft. A braking device is located on the main shaft and at one end away from the disc-type permanent magnet motor.

[0010] Furthermore, the first-stage planetary gear is fixed to the first-stage cage by a first fixing pin, and the second-stage planetary gear is fixed to the second-stage cage by a second fixing pin.

[0011] Furthermore, it also includes a left side plate and a right side plate, which are disposed on both sides of the housing.

[0012] Furthermore, it also includes a left end cover and a right end cover, wherein the left end cover is disposed on the left side plate and the right end cover is disposed on the right side plate.

[0013] Furthermore, it also includes a self-aligning roller bearing, which is sleeved on the main shaft and located between the main shaft and the left end cover and the right end cover.

[0014] Furthermore, the braking device includes a handbrake and a safety lock, a brake disc, a right brake, a left brake, and a linkage mechanism; the brake disc is sleeved on the main shaft, the safety lock is fixed to the left side plate by a support rod, the right brake and the left brake are located on both sides of the brake disc, and the handbrake is connected to the right brake and the left brake through the linkage mechanism.

[0015] Furthermore, the linkage mechanism includes a first link and a second link, a link seat, and a third link. The first link and the second link are both connected to one end of the right brake and the left brake, respectively. The link seat is connected to the second link and the third link, and the third link is connected to the handbrake.

[0016] Furthermore, a support column is provided on the left side plate, and the other ends of the right brake and the left brake are rotatably mounted on the support column.

[0017] Furthermore, it also includes a support frame, the housing is disposed within the support frame, and the handbrake is disposed at one end of the support frame and near the end of the housing.

[0018] This utility model also provides a beam pumping unit, including the aforementioned composite direct drive motor.

[0019] The technical solution of this utility model has the following advantages: 1. The composite direct-drive motor provided by this utility model includes: a disc-type permanent magnet motor and a reducer, which are mounted side-by-side on a main shaft. The disc-type permanent magnet motor includes a housing and a stator and a rotor. The rotor is mounted on the main shaft, the stator is mounted on the rotor, and the housing is mounted on the stator. The reducer includes a housing and a first-stage reduction mechanism and a second-stage reduction mechanism. The housing is mounted on the first-stage reduction mechanism and the second-stage reduction mechanism. The first-stage reduction mechanism includes a first-stage sun gear, a first-stage planetary gear, a first-stage cage, and a first-stage internal gear ring, which are mounted sequentially from the inside to the outside on the main shaft. The first-stage sun gear is connected to the rotor. The second-stage reduction mechanism includes a second-stage sun gear, a second-stage planetary gear, a second-stage cage, and a second-stage internal gear ring, which are mounted sequentially from the inside to the outside on the main shaft. The second-stage sun gear is connected to the first-stage cage. A flat key is provided on the second-stage cage, and the flat key is connected to the main shaft. A braking device is provided on the main shaft and at one end away from the disc-type permanent magnet motor.

[0020] By mounting the rotor on the main shaft and the stator on the rotor, when the composite direct drive motor is energized, the stator generates a magnetic field, which drives the rotor to rotate. Simultaneously, since the rotor is connected to the first-stage sun gear, it drives the first-stage sun gear to rotate synchronously. The first-stage sun gear transmits power to the first-stage planetary gears, causing them to rotate around the first-stage internal gear ring. This power is then transmitted to the first-stage cage, causing the cage to rotate. Because the first-stage cage is fixedly connected to the second-stage sun gear, the first-stage reduction mechanism drives the second-stage reduction mechanism to rotate synchronously. The second-stage sun gear transmits power to the second-stage planetary gears, causing them to rotate around the second-stage internal gear ring. This power is then transmitted to the second-stage cage, causing it to rotate. The second-stage cage is connected to the main shaft of the composite direct drive motor via a key, causing the main shaft to rotate and transmitting the final torque. A braking device then brakes the main shaft, quickly stopping its rotation.

[0021] In practical applications, this composite direct-drive motor is directly installed on the beam pumping unit. The motor drives the crank of the beam pumping unit to rotate for oil extraction, replacing the traditional motor-belt transmission method and eliminating all the drawbacks of belt drives. This allows for more precise control of the pumping unit's stroke rate and lower stroke rates; more accurate detection of the pumping unit's operating status, unaffected by belts; reduced manual belt replacement time; safer operation; and no exposed rotating parts. Furthermore, during the retrofitting of old wells, unlike semi-direct-drive motors, there is no need for surveying each well, making it highly adaptable and easy to widely adopt. The integrated design saves space and reduces costs; the direct drive method using a disc permanent magnet motor to directly drive the reducer results in higher transmission efficiency and greater energy savings.

[0022] 2. The composite direct-drive motor provided by this utility model further includes a left side plate and a right side plate, which are disposed on both sides of the housing. That is, the left side plate and right side plate are used to enclose the housing, thereby ensuring the airtightness of the composite direct-drive motor and preventing damage to the components inside the housing.

[0023] 3. The composite direct-drive motor provided by this utility model also includes a self-aligning roller bearing, which is sleeved on the main shaft and located between the main shaft and the left and right end covers. The self-aligning roller bearing on the main shaft increases the lubrication of the connection between the main shaft and the left and right end covers, and prevents friction between the left and right end covers and the main shaft, thus avoiding any impact on the rotation of the main shaft.

[0024] 4. The composite direct-drive motor provided by this utility model includes a braking device comprising a handbrake and a safety lock, a brake disc, a right brake, a left brake, and a linkage mechanism. The brake disc is sleeved on the main shaft, the safety lock is mounted on the brake disc, and the right and left brakes are located on opposite sides of the brake disc. The handbrake is connected to the right and left brakes via the linkage mechanism. By using the brake disc, when braking is required, the handbrake is activated via the linkage mechanism. The linkage mechanism drives the right and left brakes to move simultaneously toward and contact the brake disc, stopping its rotation. This stops the main shaft from rotating, and the safety lock then locks the disc, thus achieving the braking function of the main shaft.

[0025] The utility model summary section is provided to present the chosen concepts in a simplified form, which will be further described in the detailed embodiments below. The utility model summary section is not intended to identify essential or essential features of this disclosure, nor is it intended to limit the scope of this disclosure. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the walking beam pumping unit provided by this utility model; Figure 2 A schematic diagram of the composite direct drive motor provided by this utility model; Figure 3 This is a front view of the composite direct drive motor provided by this utility model; Figure 4 Rear view of the composite direct drive motor provided by this utility model; Figure 5 A top view of the composite direct drive motor provided by this utility model; Figure 6 A cross-sectional view of the composite direct drive motor provided by this utility model.

[0028] Explanation of reference numerals in the attached figures: 1. Disc-type permanent magnet motor; 101. Housing; 102. Stator; 103. Rotor; 2. Reducer; 201. Housing; 211. First-stage internal gear ring; 212. First-stage cage; 213. First-stage planetary gears; 214. First-stage sun gear; 215. First retaining pin; 221. Second-stage internal gear ring; 222. Second-stage cage; 223. Second-stage planetary gears; 224. Second-stage sun gear; 225. Second retaining pin; 3. 1. Braking device; 301. Handbrake; 302. Safety lock; 303. Brake disc; 304. Right brake; 305. Left brake; 306. First connecting rod; 307. Second connecting rod; 308. Connecting rod seat; 309. Third connecting rod; 4. Main shaft; 5. Right side plate; 6. Right end cover; 7. Left side plate; 8. Left end cover; 9. Self-aligning roller bearing; 10. Flat key; 11. Support frame; 12. Support column; 13. Support rod. Detailed Implementation

[0029] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this disclosure. Therefore, the drawings and description are to be considered exemplary in nature and not restrictive.

[0030] The preferred embodiments of this disclosure are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0031] Please see Figures 1 to 6 As shown, this utility model provides a composite direct-drive motor, including: a disc-type permanent magnet motor 1 and a reducer 2, which are mounted side-by-side on a main shaft 4. The disc-type permanent magnet motor 1 includes a housing 101, a stator 102, and a rotor 103. The rotor 103 is mounted on the main shaft 4, the stator 102 is mounted on the rotor 103, and the housing 101 is mounted on the stator 102. The reducer 2 includes a housing 201, a first-stage reducer 2 structure, and a second-stage reducer 2 structure. The housing 201 is mounted on the first-stage reducer 2 structure and the second-stage reducer 2 structure. The first-stage reducer 2 structure includes components sequentially mounted from the inside to the outside on the main shaft 4. The first-stage sun gear 214, first-stage planetary gear 213, first-stage cage 212, and first-stage internal gear ring 211 are mounted on the main shaft 4. The first-stage sun gear 214 is connected to the rotor 103. The second-stage reducer 2 includes a second-stage sun gear 224, second-stage planetary gear 223, second-stage cage 222, and second-stage internal gear ring 221, which are sequentially mounted on the main shaft 4 from the inside to the outside. The second-stage sun gear 224 is connected to the first-stage cage 212. A flat key 10 is provided on the second-stage cage 222, and the flat key 10 is connected to the main shaft 4. A brake device 3 is located on the main shaft 4 and is located away from one end of the disc permanent magnet motor 1.

[0032] By mounting the rotor 103 on the main shaft 4 and the stator 102 on the rotor 103, when the composite direct drive motor is energized, the stator 102 generates a magnetic field, thereby driving the rotor 103 to rotate. Simultaneously, since the rotor 103 is connected to the first-stage sun gear 214, the rotor 103 can drive the first-stage sun gear 214 to rotate synchronously. The first-stage sun gear 214 transmits power to the first-stage planetary gears 213, causing the first-stage planetary gears 213 to rotate on the first-stage internal gear ring 211. This, in turn, transmits power from the first-stage planetary gears 213 to the first-stage cage 212 ... The primary cage 212 rotates; since the primary cage 212 is fixedly connected to the secondary sun gear 224, the primary reducer 2 drives the secondary reducer 2 to rotate synchronously. The secondary sun gear 224 transmits power to the secondary planetary gears 223, causing the secondary planetary gears 223 to rotate around the secondary internal gear ring 221, and then transmits the power of the secondary planetary gears 223 to the secondary cage 222, causing the secondary cage 222 to rotate. The secondary cage 222 is connected to the main shaft 4 of the composite direct drive motor via the flat key 10, thereby causing the main shaft 4 to rotate and transmitting the final torque. Then, the braking device 3 brakes the main shaft 4, causing the main shaft 4 to stop rotating quickly.

[0033] In practical applications, this composite direct-drive motor is directly installed on the beam pumping unit. The composite direct-drive motor drives the crank of the beam pumping unit to rotate for oil extraction, replacing the traditional motor and belt-driven transmission method and eliminating all the disadvantages of belt drives. This allows for more precise control of the pumping unit's stroke rate and lower stroke rates; more accurate detection of the pumping unit's operating status, unaffected by belts; and reduced manual belt replacement time, resulting in safer operation with no exposed rotating parts. Furthermore, during the renovation of old wells, it eliminates the need for surveying each well as with semi-direct-drive motors, making it highly adaptable and easy to widely adopt. The integrated design saves space and reduces costs; the direct drive method using a disc permanent magnet motor 1 to directly drive the reducer 2 results in higher transmission efficiency and greater energy savings.

[0034] The first-stage reducer 2 and the second-stage reducer 2 are arranged in parallel, and the housing 201 is fitted onto the first-stage reducer 2 and the second-stage reducer 2. Specifically, the first-stage planetary gear 213 is meshed with the first-stage internal gear ring 211 and the first-stage sun gear 214; the second-stage planetary gear 223 is meshed with the second-stage internal gear ring 221 and the second-stage sun gear 224.

[0035] In some optional embodiments, the first-stage planetary gear 213 is fixed to the first-stage cage 212 by the first fixing pin 215, so that the first-stage planetary gear 213 and the first-stage cage 212 are connected as a whole, that is, the power of the first-stage planetary gear 213 is transmitted to the first-stage cage 212, causing the first-stage cage 212 to rotate. The secondary planetary gear 223 is fixed to the secondary cage 222 by the second fixing pin 225, so that the secondary planetary gear 223 and the secondary cage 222 are connected into one piece, that is, the power of the secondary planetary gear 223 is transmitted to the secondary cage 222, causing the secondary cage 222 to rotate.

[0036] The composite direct drive motor also includes a left side plate 7 and a right side plate 5, which are located on both sides of the housing 101. The left side plate 7 and right side plate 5 are used to enclose the housing 101, thereby ensuring the airtightness of the composite direct drive motor and preventing damage to the components inside the housing 101.

[0037] In some optional embodiments, the composite direct drive motor further includes a left end cover 8 and a right end cover 6, wherein the left end cover 8 is disposed on the left side plate 7 and the right end cover 6 is disposed on the right side plate 5. The arrangement of the left end cover 8 and the right end cover 6 can effectively realize the connection between the left side plate 7, the right side plate 5 and the main shaft 4, ensuring the sealing of the composite direct drive motor.

[0038] Specifically, the composite direct drive motor also includes a self-aligning roller bearing 9, which is sleeved on the main shaft 4 and located between the main shaft 4 and the left end cover 8 and the right end cover 6.

[0039] The self-aligning roller bearing 9 is installed on the main shaft 4, which increases the lubrication between the main shaft 4 and the left end cover 8, and between the main shaft 4 and the right end cover 6, and avoids the situation where the left end cover 8 and the right end cover 6 rub against the main shaft 4, thus affecting the rotation of the main shaft 4.

[0040] In some optional embodiments, the braking device 3 includes a handbrake 301 and a safety lock 302, a brake disc 303, a right brake 304, a left brake 305, and a linkage mechanism; the brake disc 303 is sleeved on the main shaft 4, the safety lock 302 is fixed to the left side plate by a support rod 13, the right brake 304 and the left brake 305 are located on both sides of the brake disc 303, and the handbrake 301 is connected to the right brake 304 and the left brake 305 by a linkage mechanism.

[0041] By setting the brake disc 303, when braking is required, the handbrake 301 is activated via the linkage mechanism. The linkage mechanism drives the right brake 304 and the left brake 305 to move towards the brake disc 303 simultaneously and come into contact with it, causing the brake disc 303 to stop rotating. This, in turn, stops the main shaft 4 from rotating. The safety lock 302 is then used to lock the main shaft 4, thus achieving the braking function of the main shaft 4.

[0042] The linkage mechanism includes a first link 306, a second link 307, a link seat 308, and a third link 309. The first link 306 and the second link 307 are both connected to one end of the right brake 304 and the left brake 305. The link seat 308 is connected to the second link 307 and the third link 309. The third link 309 is connected to the handbrake 301.

[0043] The handbrake 301 is connected to the third link 309, and the third link 309 is connected to the link seat 308. This causes the link seat 308 to rotate, which in turn causes the first link 306 and the second link 307 to move. This causes the right brake 304, which is connected to the first link 306, and the left brake 305, which is connected to the second link 307, to rotate and come into contact with the brake disc 303. This stops the brake disc 303 from rotating, and consequently, stops the main shaft 4 from rotating.

[0044] Specifically, a support column 12 is provided on the left side plate 7, and the other ends of the right brake 304 and the left brake 305 are rotatably mounted on the support column 12. The support column 12 provides a mounting base for the right brake 304 and the left brake 305, ensuring the stability when the first link 306 drives the right brake 304 and the second link 307 drives the left brake 305.

[0045] In some optional embodiments, the composite direct drive motor further includes a support frame 11, the housing 101 is disposed within the support frame 11, and the handbrake 301 is disposed at one end of the support frame 11 and near one end of the housing 101.

[0046] By setting the support frame 11, the housing 101 can be coaxially sleeved in the support frame 11, and the support frame 11 can be used to provide support for the overall composite direct drive motor.

[0047] Meanwhile, the handbrake 301 is mounted on the support frame 11, which provides an installation position for the handbrake 301 and ensures the installation stability of the handbrake 301.

[0048] This utility model also provides a beam pumping unit, including the aforementioned composite direct drive motor.

[0049] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A composite direct-drive motor, characterized in that, include: A disc-type permanent magnet motor (1) and a reducer (2) are mounted side by side on a main shaft (4). The disc-type permanent magnet motor (1) includes a housing (101), a stator (102), and a rotor (103). The rotor (103) is mounted on the main shaft (4), the stator (102) is mounted on the rotor (103), and the housing (101) is mounted on the stator (102). The reducer (2) includes a housing (201) and a first-stage reducer (2) structure and a second-stage reducer (2) structure. The housing (201) is fitted on the first-stage reducer (2) structure and the second-stage reducer (2) structure. The first-stage reducer (2) structure includes a first-stage sun gear (214) and a first-stage planetary gear (213), a first-stage cage (212), and a first-stage internal gear ring (211) that are fitted on the main shaft (4) from the inside to the outside. The first-stage sun gear (214) is connected to the rotor (103). The two-stage reducer (2) includes a two-stage sun gear (224) and a two-stage planetary gear (223), a two-stage cage (222), and a two-stage internal gear ring (221) sequentially mounted on the main shaft (4) from the inside to the outside. The two-stage sun gear (224) is connected to the first-stage cage (212). The second-stage cage (222) is provided with a flat key (10), which is connected to the main shaft (4). The braking device (3) is located on the main shaft (4) and is located away from the end of the disc permanent magnet motor (1).

2. The composite direct drive motor according to claim 1, characterized in that, The first-stage planetary gear (213) is fixed to the first-stage cage (212) by the first fixing pin (215), and the second-stage planetary gear (223) is fixed to the second-stage cage (222) by the second fixing pin (225).

3. A composite direct-drive motor according to claim 1 or 2, characterized in that, It also includes a left side plate (7) and a right side plate (5), which are located on both sides of the housing (101).

4. A composite direct-drive motor according to claim 3, characterized in that, It also includes a left end cover (8) and a right end cover (6), with the left end cover (8) located on the left side plate (7) and the right end cover (6) located on the right side plate (5).

5. A composite direct-drive motor according to claim 4, characterized in that, It also includes a self-aligning roller bearing (9), which is sleeved on the main shaft (4) and located between the main shaft (4) and the left end cover (8) and the right end cover (6).

6. A composite direct-drive motor according to claim 5, characterized in that, The braking device (3) includes a handbrake (301) and a safety lock (302), a brake disc (303), a right brake (304), a left brake (305), and a linkage mechanism; the brake disc (303) is mounted on the main shaft (4), the safety lock (302) is fixed on the left side plate (7) by a support rod (13), the right brake (304) and the left brake (305) are located on both sides of the brake disc (303), and the handbrake (301) is connected to the right brake (304) and the left brake (305) by a linkage mechanism.

7. A composite direct-drive motor according to claim 6, characterized in that, The linkage mechanism includes a first link (306) and a second link (307), a link seat (308) and a third link (309). The first link (306) and the second link (307) are both connected to one end of the right brake (304) and the left brake (305). The link seat (308) is connected to the second link (307) and the third link (309). The third link (309) is connected to the handbrake (301).

8. A composite direct-drive motor according to claim 6, characterized in that, A support column (12) is provided on the left side plate (7), and the other ends of the right brake (304) and the left brake (305) are rotatably mounted on the support column (12).

9. A composite direct-drive motor according to claim 6, characterized in that, It also includes a support frame (11), a housing (101) is disposed inside the support frame (11), and a handbrake (301) is disposed at one end of the support frame (11) and at the end near the housing (101).

10. A beam pumping unit, characterized in that, Includes a composite direct drive motor according to any one of claims 1-9.

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