Flexible connection braking device of motor and speed reducer and driver with flexible connection braking device

Abstract

A flexible connection brake device of a motor and a speed reducer is characterized by comprising a brake disc, a bearing disc, a flange disc, an output shaft and rolling bodies, the brake disc is axially hollow, the front end of the brake disc is open, and the brake disc is provided with a built-in area; the bearing disc can be rotationally arranged in the built-in area of the brake disc, a first adaptive groove and a second adaptive groove are formed in the circumferential direction of the front end face of the bearing disc, a driving part protruding forwards is formed between the first adaptive groove and the second adaptive groove, and the bearing disc can be connected with a driving shaft of a motor; and the output shaft is rotatably arranged in the flange plate, and a bearing block is arranged at the rear end of the output shaft. The invention further discloses a driver. Due to the fact that pure machinery is adopted to achieve locking braking, circuit control and power supply are not needed, and circuit control needs an accurate algorithm and a complex circuit design, the advantages of being small in energy consumption and low in cost are achieved. The overall reliability is high and the failure rate is low.

Description

Technical Field

[0001] The present invention relates to a connection structure between a motor and a reducer, and in particular to a soft connection brake device capable of being engaged and disengaged between the motor and the reducer. The present invention also relates to a motor driver which can be applied to blinds, electric roller blinds or electric roller shutter doors. Background Art

[0002] The shutter drive device generally drives the shutter to rise or fall through a drive motor, but an additional braking function needs to be provided to ensure that the output end of the drive motor can be braked immediately when the drive motor stops rotating, so that the shutter can stop at the expected position.

[0003] The existing shutter drive device includes a tubular housing, a drive motor, a drive shaft, a turntable and a locking disk. A spring and a ratchet are provided in the turntable, a centrifugal block is provided on the ratchet, and a locking support is provided on the locking disk. When the drive motor is powered off, the ratchet engages the locking support of the locking disk to achieve rapid braking; when voltage is applied and the drive motor is started, the ratchet disengages from the locking support to achieve unlocking. The brake structure composed of the turntable and the locking disk is integrated inside the motor. For related literature, please refer to the Chinese invention patent application with application number 202180047461.2, "Control Method of Active Locking Centrifugal Brake and Shutter Driver" (application publication number CN115885082A).

[0004] The brake structure in the prior art has the following deficiencies: First, the brake structure needs to be instructed by the electrical signal of the driving motor to work, so it needs to design an additional control circuit to achieve it. The design of the control circuit involves the precise and complex calculation of the algorithm, which has the manufacturing cost of the control circuit and requires an additional power supply. If the control circuit fails or the power fails, it will cause a malfunction. Secondly, the combination of the turntable and the locking disk occupies a large axial length, which is relatively bloated and the installation space is relatively large, which is not compact enough. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a soft-connection braking device between a motor and a reducer which does not require circuit control in view of the above technical status.

[0006] The second technical problem to be solved by the present invention is to provide a driver with a soft-connection braking device that does not require circuit control in view of the above technical status.

[0007] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a soft connection brake device between a motor and a reducer, characterized in that it includes

[0008] A brake disc, hollow in the axial direction, open at the front end and having a built-in area;

[0009] A carrier plate is rotatably disposed in the built-in area of ​​the brake disc and has a first adapter groove and a second adapter groove in the circumferential direction of the front end surface. A driving portion protruding forward is formed between the first adapter groove and the second adapter groove. The carrier plate can be connected to the driving shaft of the motor.

[0010] A flange, which is axially hollow and disposed on the front end surface of the brake disc;

[0011] An output shaft is rotatably disposed in the aforementioned flange and has a receiving block at the rear end, the receiving block having a transmission part, a locking part and an unlocking part, the aforementioned transmission part radially extends outward and is adapted in the aforementioned first adapting groove and has a matching gap with the inner wall of the first adapting groove, the aforementioned locking part has at least two parts and the outer end surface is adapted to the inner wall of the driving part, the aforementioned unlocking part is arranged close to the aforementioned second adapting groove and is located between the locking parts, and the output shaft can be connected to the reducer; and

[0012] A rolling element is disposed in the aforementioned second adapting groove;

[0013] When the aforementioned carrier plate is in the rotating state, the driving part of the carrier plate acts on the transmission part, thereby driving the output shaft and the rolling body to rotate; and the rolling body is always located between the unlocking part and the inner wall of the brake disc and can move; in this way, the motor power can be transmitted to the output shaft through the carrier plate.

[0014] When the bearing disc stops rotating, the rotating output shaft drives the receiving block to rotate, and the locking part moves closer to the rolling body to clamp and lock the brake disc and the receiving block. In this way, after the motor stops rotating, the output shaft can be braked immediately.

[0015] Preferably, there are at least two first adapter grooves arranged symmetrically with respect to the axis of the output shaft, and at least two second adapter grooves arranged symmetrically with respect to the axis of the output shaft. Correspondingly, the receiving block has at least two groups of transmission parts, locking parts and unlocking parts. Of course, three or four groups can be designed.

[0016] The rolling body can be a steel ball or a cylindrical needle roller.

[0017] Preferably, the receiving block and the output shaft are an integral piece or are designed as separate pieces and connected as a whole.

[0018] Furthermore, the outer end surface of the locking portion is in an arc shape, and the outer end surface of the unlocking portion is a flat surface.

[0019] The rotating assembly of the output shaft is preferably arranged as follows: a bearing is arranged in the central through hole of the flange, and the output shaft is rotatably arranged through the aforementioned bearing.

[0020] Furthermore, the built-in area of ​​the brake disc has an annular step portion, and the bearing disc is limited on the step portion.

[0021] The technical solution adopted by the present invention to solve the above second technical problem is: a driver with a soft-connection braking device for a motor and a reducer, comprising a motor, a reducer and a soft-connection braking device arranged between the motor and the reducer.

[0022] Compared with the prior art, the advantages of the present invention are: since the locking brake is achieved purely mechanically, there is no need for circuit control and power supply, while circuit control requires precise algorithms and complex circuit design, so it has the advantages of low energy consumption and low cost; and since it does not involve circuit control and power supply issues, the overall reliability is high and the failure rate is low; there is no turntable and locking disk, only a single brake disk, which is more compact and has an advantage in installation space and product length; when the driver is used, it is arranged between the motor and the reducer, which is a built-in design, and no additional noise will be generated when locking braking occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of Example 1.

[0024] Figure 2 This is an exploded view of Example 1.

[0025] Figure 3 for Figure 2 A magnified exploded view of the mid-drive.

[0026] Figure 4 for Figure 2 Magnified perspective cutaway view of the mid-drive.

[0027] Figure 5 for Figure 4 Enlarged combination diagram of the output shaft, adapter block, rolling element and carrier plate.

[0028] Figure 6 This is a schematic diagram of the transmission state of the driver in Example 1.

[0029] Figure 7 for Figure 6 Enlarged view of part A in the middle.

[0030] Figure 8 This is a schematic diagram of the braking state of the driver in Example 1.

[0031] Fig. 9 This is a combined diagram of the output shaft, receiving block, rolling element and carrier plate in Example 2. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to the accompanying drawings.

[0033] Embodiment 1, as Figure 1 and Figure 2 As shown, the driver in this embodiment can be applied to blinds, electric roller blinds or electric roller shutter doors, and specifically includes a motor 100, a reducer 101 and a soft connection brake device 10 provided between the motor 100 and the reducer 101. The motor 100 has a drive shaft 102, and the reducer 101 can be a planetary reducer.

[0034] like Figure 3 , Figure 4 and Figure 5 As shown, the soft connection brake device 10 in this embodiment includes a brake disc 1, a bearing disc 2, a flange 6, an output shaft 3 and a rolling body 5. The brake disc 1 is hollow in the axial direction, open at the front end and has a built-in area 11. After installation, the brake disc 1 is connected and fixed to the housing of the motor 100.

[0035] The carrier disc 2 is rotatably arranged in the built-in area 11 of the brake disc 1 and has a first adapting groove 21 and a second adapting groove 22 in the circumferential direction of the front end surface. Figure 4 As shown, the inner region 11 of the brake disc 1 has an annular step 12 , and the carrier disc 2 is located on the step 12 .

[0036] A driving portion 23 protruding forward is formed between the first adapting groove 21 and the second adapting groove 22 . The supporting plate 2 can be connected to the driving shaft 102 of the motor through the inner hole 12 .

[0037] The flange 6 is axially hollow and is disposed on the front end surface of the brake disc 1 to form an integral part with the brake disc 1. Specifically, the two can be fixed by connecting bolts.

[0038] The output shaft 3 is rotatably arranged in the flange 6 and a receiving block 4 is provided at the rear end. The receiving block 4 has a transmission part 41, a locking part 42 and an unlocking part 43. The transmission part 41 extends radially outward and is adapted in the first adapting groove 21 and has a matching gap with the inner wall of the first adapting groove 21. There are four locking parts 42, two in a group. The outer end surface of the locking part 42 is adapted to the inner wall of the driving part 23. The unlocking part 43 is arranged close to the second adapting groove 22 and is located between the locking parts 42. The output shaft 3 can be connected to the reducer. Specifically, a central gear can be provided at the front end of the output shaft 3 to mesh with the input gear of the reducer 101 to achieve connection; the receiving block 4 and the output shaft 3 in this embodiment are an integral part.

[0039] The rolling body 5 is disposed in the second adapting groove 22; the rolling body 5 in this embodiment is a steel ball.

[0040] In this embodiment, there are two first adapting grooves 21 and they are arranged symmetrically with respect to the axis direction of the output shaft 3. There are two second adapting grooves 22 and they are arranged symmetrically with respect to the axis direction of the output shaft 3. Correspondingly, the receiving block 4 has two sets of transmission parts 41, locking parts 42 and unlocking parts 43.

[0041] A bearing 31 and a bearing 32 are arranged in the central through hole of the flange 6, and the output shaft 3 is rotatably arranged in the bearing 31 and the bearing 32. The bearing 32 is limited by a retaining spring 33.

[0042] Combination Figure 6 and Figure 7 As shown, after the motor 100 is started, the carrier plate 2 is driven to rotate, and the driving part 23 of the carrier plate 2 acts on the transmission part 41, thereby driving the output shaft 3 and the rolling body 5 to rotate; and the rolling body 5 is always located between the unlocking part 43 and the inner wall of the brake disc 1 and can move, as shown in FIG. Figure 7 As shown, there is an active gap 1a between the rolling element 5 and the unlocking portion 43. Thus, the power of the motor 100 can be transmitted to the output shaft 3 through the carrier plate 2, and then transmitted to the reducer 101. The forward and reverse rotation principles of the carrier plate 2 are the same.

[0043] like Figure 8 As shown, after the motor 100 is powered off, the bearing plate 2 stops rotating, the rotating output shaft 3 drives the receiving block 4 to rotate, and the locking portion 42 moves closer to the rolling body 5 to clamp and lock the brake disc 1 and the receiving block 4. In this way, after the motor stops rotating, the output shaft can be braked immediately. The principle of the output shaft 3 is the same for forward and reverse rotation.

[0044] Since it uses pure mechanical means to achieve automatic locking braking without affecting normal power transmission, and does not require circuit control and power supply, it has the advantages of low energy consumption and low cost. Since it does not involve circuit control and power supply issues, it has high overall reliability and low failure rate. It is located between the reducer and the motor, has a more compact size, and is a built-in design. When locking braking occurs, there will be no additional noise, and the user experience is good.

[0045] Embodiment 2, as Fig. 9 As shown, the rolling element 5 in this embodiment is a cylindrical needle roller. Other structures and working principles refer to the first embodiment.

Claims

1. A soft connection brake device between a motor and a reducer, characterized in that include A brake disc (1) which is axially hollow, has an open front end and has a built-in area (11); A carrier disc (2) is rotatably arranged in the built-in area (11) of the brake disc (1) and has a first adapting groove (21) and a second adapting groove (22) in the circumferential direction of the front end surface, a driving portion (23) protruding forward is formed between the first adapting groove (21) and the second adapting groove (22), and the carrier disc (2) can be connected to the driving shaft of the motor; A flange (6) is axially hollow and is disposed on the front end surface of the brake disc (1); The output shaft (3) is rotatably arranged in the aforementioned flange (6) and is provided with a receiving block (4) at the rear end. The receiving block (4) has a transmission part (41), a locking part (42) and an unlocking part (43). The aforementioned transmission part (41) radially extends outward and is adapted in the aforementioned first adapting groove (21) and has a matching gap with the inner wall of the first adapting groove (21). The aforementioned locking part (42) is at least two and the outer end surface is adapted with the inner wall of the driving part (23). The aforementioned unlocking part (43) is arranged close to the aforementioned second adapting groove (22) and is located between the locking part (42). The output shaft (3) can be connected to the reducer; as well as A rolling body (5) is arranged in the aforementioned second adapting groove (22); When the aforementioned carrier plate (2) is in a rotating state, the driving portion (23) of the carrier plate (2) acts on the transmission portion (41), thereby driving the output shaft (3) and the rolling body (5) to rotate; and the rolling body (5) is always located between the unlocking portion (43) and the inner wall of the brake disc (1) and can move; When the aforementioned carrier disc (2) stops rotating, the rotating output shaft (3) drives the receiving block (4) to rotate, and the locking portion (42) moves closer to the rolling body (5) to clamp and lock the brake disc (1) and the receiving block (4).

2. The soft connection brake device for the motor and the reducer according to claim 1 is characterized in that There are at least two first adapting grooves (21) and they are arranged symmetrically with respect to the axis direction of the output shaft (3); there are at least two second adapting grooves (22) and they are arranged symmetrically with respect to the axis direction of the output shaft (3); correspondingly, the receiving block (4) has at least two groups of transmission parts (41), locking parts (42) and unlocking parts (43).

3. The soft connection brake device for the motor and the reducer according to claim 1 is characterized in that The rolling body (5) is a steel ball or a cylindrical needle roller.

4. The soft connection brake device for the motor and the reducer according to claim 1 is characterized in that The receiving block (4) and the output shaft (3) are an integral part or are designed as separate parts and connected as a whole.

5. The soft connection brake device for the motor and the reducer according to claim 1 is characterized in that The outer end surface of the locking portion (42) is in an arc shape, and the outer end surface of the unlocking portion (43) is a flat surface.

6. The soft connection brake device for the motor and the reducer according to claim 1 is characterized in that A bearing is arranged in the central through hole of the flange (6), and the output shaft (3) is rotatably arranged to penetrate the aforementioned bearing.

7. The soft connection brake device for the motor and the reducer according to claim 1 is characterized in that The built-in area (11) of the brake disc (1) has an annular step portion (12), and the carrier disc (2) is limited on the step portion (12).

8. A driver having a soft-connection braking device for a motor and a reducer as claimed in any one of claims 1 to 7, comprising a motor (100), a reducer (101) and a soft-connection braking device (10) arranged between the motor (100) and the reducer (101).

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