Manually unlockable mechanical reduction mechanism

Abstract

The utility model relates to big deceleration ratio mechanical speed reduction mechanism of manual emergency unlocking, compared with prior art, the utility model discloses under the condition of power failure or drive unit failure, can drive transmission flat axle rotation more easily through the rotation of unlocking gear, under the premise of retaining big deceleration ratio planetary reducer self -locking ability, when power failure or drive unit failure, uses the unlocking tool to pass through the unlocking hole on the sleeve, rotates unlocking gear to be used to unlock operation, as the means of emergency or maintenance, convenient operation, realized the emergency rotation of first speed reduction unit and second speed reduction unit under the condition of power failure or drive unit failure, finally realizes the emergency rotation of output main shaft, is used for emergency operation or maintenance.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a mechanical speed reduction mechanism that can be manually unlocked. Background Technology

[0002] A planetary gear reducer is a precision speed reduction device based on the principle of planetary gear transmission. Its core structure consists of a sun gear, planet gears, an internal gear ring, and a planet carrier, achieving power transmission through multi-tooth meshing. Planetary gear reducers feature high precision and efficiency, a compact structure, and high load-bearing capacity, and are widely used in various fields such as industrial automation, power tools, automobiles, special equipment, and household appliances.

[0003] However, mechanical speed reduction mechanisms with large reduction ratios often have a large self-locking force, making them difficult to operate manually in the event of power failure or motor malfunction. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the existing technology and provide a mechanical deceleration mechanism that can be manually unlocked.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] According to the present invention, a manually unlockable mechanical deceleration mechanism includes a drive unit, a first deceleration unit, a second deceleration unit, a first transmission flat shaft, a coupling, a second transmission flat shaft, and an unlocking gear.

[0007] The output shaft of the drive unit serves as the rotation input end of the first reduction unit, and the first transmission flat shaft serves as the rotation output shaft of the first reduction unit. The first transmission flat shaft is connected to the second transmission flat shaft through the coupling, and the second transmission flat shaft serves as the rotation input end of the second reduction unit. This allows the output shaft of the drive unit to rotate under normal operating conditions, thereby driving the first reduction unit to rotate. The output end of the first reduction unit then drives the first transmission flat shaft to rotate, which in turn drives the second transmission flat shaft to rotate through the coupling, further driving the second reduction unit to rotate, and finally driving the output main shaft of the second reduction unit to rotate.

[0008] The unlocking gear includes a transmission part and a mounting part; the transmission part and the mounting part are integrated. The mounting part is mounted on the second transmission flat shaft through a centrally located shaft hole. The teeth of the transmission part are arranged in a ring around the outer side of the mounting part, so that when the transmission part rotates as the driving wheel, it will drive the first transmission flat shaft, the coupling, and the second transmission flat shaft to rotate together, thereby realizing the emergency rotation of the first reduction unit and the second reduction unit, and finally realizing the emergency rotation of the output main shaft.

[0009] Compared with the prior art, under normal operating conditions, the output shaft of the drive unit rotates, driving the first reduction unit to rotate. This causes the first transmission flat shaft at the output end of the first reduction unit to rotate, which in turn drives the second transmission flat shaft to rotate via a coupling, further driving the second reduction unit to rotate, and finally driving the output main shaft of the second reduction unit to rotate. In the event of a power outage or drive unit failure, the transmission flat shaft can be easily rotated by rotating the unlocking gear, enabling emergency rotation of the first reduction unit, the second reduction unit, and the output main shaft. This design retains the self-locking capability of a planetary reduction mechanism with a large reduction ratio, while also allowing manual operation of the unlocking gear for unlocking in the event of a power outage or drive unit failure. As an emergency or maintenance method, this design is convenient to operate.

[0010] Preferably, the mechanical reduction structure further includes a sleeve and an unlocking tool, and the transmission part is a bevel gear; the two ends of the sleeve are respectively connected to the first reduction unit and the second reduction unit, and the unlocking gear is located in the sleeve; the outer wall of the sleeve is provided with an unlocking hole for the unlocking tool to pass through, the toothed head of the unlocking tool is also a bevel gear, and the toothed head and the transmission part of the unlocking gear can be correspondingly engaged and transmitted, so that the unlocking tool passes through the unlocking hole, and the rotation of the toothed head of the unlocking tool drives the unlocking gear to rotate.

[0011] Compared with the prior art, this utility model retains the self-locking capability of the large reduction ratio planetary reduction mechanism. In the event of power failure or drive unit failure, an unlocking tool is used to pass through the unlocking hole on the sleeve and rotate the unlocking gear to unlock the operation. This serves as an emergency or maintenance method and is easy to operate. It enables the emergency rotation of the first and second reduction units in the event of power failure or drive unit failure, and ultimately enables the emergency rotation of the output spindle for emergency operation or maintenance.

[0012] Preferably, the unlocking tool is a cylindrical metal part with a toothed head constructed of bevel gears or a crank with a toothed head constructed of bevel gears.

[0013] Preferably, one end of the sleeve has a countersunk hole, and the sleeve is connected to the second reduction unit through the countersunk hole by a countersunk screw. The sleeve and the second reduction unit are fixedly connected by the countersunk hole to ensure the relative position of the unlocking hole and the fixing screw hole on the output shaft end face of the second reduction unit.

[0014] Preferably, the connection between the sleeve and the first reduction unit is a threaded connection, and the coupling is used to eliminate the concentricity deviation when the first transmission flat shaft and the second transmission flat shaft rotate.

[0015] Preferably, both the first deceleration unit and the second deceleration unit are provided with steps that fit the inner sides of both ends of the sleeve. The step of the first deceleration unit has an external thread structure and forms a threaded connection with the internal thread on the inner side of the end of the sleeve. The step of the second deceleration unit fits with the end of the sleeve and is fixed with a countersunk screw.

[0016] Preferably, the drive unit is a motor of various types.

[0017] Preferably, the first deceleration unit is a planetary deceleration mechanism; the second deceleration unit is a planetary deceleration mechanism;

[0018] The output shaft of the drive unit is connected to the sun gear shaft hole of the planetary reduction mechanism of the first reduction unit;

[0019] The first deceleration unit and the second deceleration unit are arranged on the same axis.

[0020] Preferably, the gear teeth in the first reduction unit and the second reduction unit include spur teeth or helical teeth.

[0021] Preferably, the first deceleration unit has a two-stage deceleration level; the second deceleration unit has a three-stage deceleration level; the first deceleration unit and the second deceleration unit together form a five-stage deceleration, forming a combined mechanical deceleration mechanism with a large reduction ratio and strong self-locking capability. Attached Figure Description

[0022] Figure 1 This is the outline drawing of this utility model;

[0023] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0024] Figure 3 This is a diagram of the unlocking gear in this utility model;

[0025] Figure 4 This is a schematic diagram of the special unlocking tool used in this utility model.

[0026] In the diagram: 1. Drive unit; 2. First reduction unit; 3. Second reduction unit; 4. First transmission flat shaft; 5. Unlocking gear; 501. Transmission part; 502. Mounting part; 6. Coupling; 7. Sleeve; 701. Unlocking hole; 8. Unlocking tool; 801. Toothed head; 802. Slotted groove; 9. Second transmission flat shaft; 10. Output spindle; 11. Fixing screw hole. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0028] This specification discloses a manually unlockable mechanical speed reduction mechanism, such as... Figure 1 , Figure 2 as well as Figure 3 As shown, it includes a drive unit 1, a first reduction unit 2, a second reduction unit 3, a first transmission flat shaft 4, a coupling 6, a second transmission flat shaft 9, and an unlocking gear 5.

[0029] The output shaft of the drive unit 1 serves as the rotation input end of the first reduction unit 2, and the first transmission flat shaft 4 serves as the rotation output shaft of the first reduction unit 2. The first transmission flat shaft 4 is connected to the second transmission flat shaft 9 through the coupling 6. The second transmission flat shaft 9 serves as the rotation input end of the second reduction unit 3. Under normal working conditions, the output shaft of the drive unit 1 rotates, which drives the first reduction unit 2 to rotate, thereby driving the output shaft of the first reduction unit 2, the first transmission flat shaft 4, to rotate. Then, through the coupling 6, the second transmission flat shaft 9 rotates, further driving the second reduction unit 3 to rotate, and finally driving the output main shaft 10 of the second reduction unit 3 to rotate.

[0030] The unlocking gear 5 comprises two parts: a transmission part 501 and a mounting part 502. The transmission part 501 and the mounting part 502 are integrated. The mounting part 502 is mounted on the second transmission flat shaft 9 through a centrally located shaft hole. The teeth of the transmission part 501 are arranged in a ring around the outer side of the mounting part 502. The unlocking gear 5 is mounted on the second transmission flat shaft 9 through a central through hole. When the transmission part 501 rotates as the driving wheel, it will drive the first transmission flat shaft 9, the coupling 6, and the second transmission flat shaft 4 to rotate together, thereby realizing the emergency rotation of the first reduction unit 2 and the second reduction unit 3, and ultimately realizing the emergency rotation of the output main shaft 10.

[0031] In one embodiment, such as Figure 2 , Figure 3 as well as Figure 4As shown, the mechanical reduction structure also includes a sleeve 7 and an unlocking tool 8. The transmission part 501 is a bevel gear. The two ends of the sleeve 7 are respectively connected to the first reduction unit 2 and the second reduction unit 3, and the unlocking gear 5 is located in the sleeve 7. The outer wall of the sleeve 7 is provided with an unlocking hole 701 for the unlocking tool 8 to pass through. The toothed head 801 of the unlocking tool 8 is also a bevel gear, and the toothed head 801 and the transmission part 501 of the unlocking gear 5 can mesh and transmit power, so that the unlocking tool 8 passes through the unlocking hole 701, and the rotation of the toothed head 801 of the unlocking tool 8 drives the unlocking gear 5 to rotate. Among them, the toothed head 801 and the transmission part 501 are two bevel gear structures with the same module that can mesh with each other.

[0032] In one embodiment, the unlocking tool 8 includes a cylindrical metal part with a toothed head 801 having a bevel gear structure or a crank with a toothed head 801 having a bevel gear structure. The cylindrical metal part can be rotated by aligning a screwdriver with the slot 802 at the tail of the unlocking tool or used by clamping it onto an electric drill. If it is a crank, it can be operated by hand.

[0033] In one embodiment, one end of the sleeve 7 is provided with a countersunk hole, and the sleeve 7 is connected to the second reduction unit 3 through the countersunk hole by a countersunk screw. The sleeve 7 and the second reduction unit 3 are fixedly connected by the countersunk hole position to ensure the relative position of the unlocking hole 701 and the fixing screw hole 11 on the output shaft end face of the second reduction unit 3.

[0034] In one embodiment, the connection between the sleeve 7 and the first reduction unit 2 is fixed by a threaded connection, and the coupling 6 is used to eliminate the concentricity deviation when the first transmission flat shaft 4 and the second transmission flat shaft 9 rotate, thereby reducing noise and transmission loss.

[0035] In one embodiment, both the first deceleration unit 2 and the second deceleration unit 3 are provided with steps that fit the inner sides of both ends of the sleeve 7. The steps of the first deceleration unit 2 have an external thread structure and form a threaded connection with the internal thread on the inner side of the end of the sleeve 7. The steps of the second deceleration unit 3 fit with the end of the sleeve 7 and are fixed with countersunk screws.

[0036] In one embodiment, the unlocking gear 5 includes a bevel gear transmission part 501 and a sleeve-shaped mounting part 502, which is fixed to the cylindrical portion of the second transmission flat shaft 9 close to the second reduction unit through a centrally located through-hole; the toothed head 801 of the unlocking tool 8 can mesh with the conical meshing structure of the transmission part 501 for transmission. The mounting part 502 is fixed to the cylindrical portion of the second transmission flat shaft 9 close to the second reduction unit through a centrally located through-hole.

[0037] In one embodiment, the drive unit 1 is a motor of various types. Under normal operating conditions, the motor is energized and rotates, driving the first reduction unit 2 to rotate, which in turn drives the second reduction unit 3 to rotate via the coupling 6.

[0038] In one embodiment, the first reduction unit 2 is a planetary reduction mechanism; the second reduction unit 3 is a planetary reduction mechanism; the output shaft of the drive unit 1 is connected to the sun gear shaft hole of the planetary reduction mechanism of the first reduction unit 2; the first reduction unit 2 and the second reduction unit 3 are arranged on the same axis.

[0039] In one embodiment,

[0040] The gears in the first reduction unit 2 and the second reduction unit 3 include spur teeth or helical teeth.

[0041] In one embodiment, the first deceleration unit 2 has a two-stage deceleration, and the second deceleration unit 3 has a three-stage deceleration. For further design improvements, to ensure easier manual unlocking, the number of deceleration stages in the first deceleration unit 2 should be less than the number of deceleration stages in the second deceleration unit 3. This mechanical deceleration mechanism typically has a large reduction ratio, usually five stages, where the first deceleration unit 2 is a primary planetary deceleration mechanism with two stages, and the second deceleration unit 3 is a secondary planetary deceleration mechanism with three stages. The overall reduction ratio of the entire mechanism reaches hundreds to thousands of times to one.

[0042] This utility model discloses a manually unlockable, high-reduction-ratio planetary reduction mechanism, comprising a motor, a primary planetary reduction mechanism, a secondary planetary reduction mechanism, a first transmission flat shaft 4, a second transmission flat shaft 9, a bevel gear, a coupling 6, a sleeve 7, and an output main shaft 10. The motor is assembled with the primary planetary reduction mechanism. The bevel gear is fixed to the second transmission flat shaft 9 of the secondary planetary reduction mechanism. The coupling 6 connects the output shaft of the primary planetary reduction mechanism (first transmission flat shaft 4) and the second transmission flat shaft 9, which serves as the input shaft of the secondary planetary reduction mechanism. One end of the sleeve 7 is threaded to the primary planetary reduction mechanism, and the other end is screwed to the secondary planetary reduction mechanism. Simultaneously, the first transmission flat shaft 4, the second transmission flat shaft 9, the bevel gear, and the coupling 6 are concealed within the sleeve 7.

[0043] The primary planetary reduction mechanism and the secondary planetary reduction mechanism are connected in series via coupling 6 to form a combined reduction mechanism. A special unlocking tool 8 can be inserted into an unlocking hole on the side of the sleeve 7 and mesh with a bevel gear fixed on the second transmission flat shaft 4 to rotate, thereby further driving the primary planetary reduction mechanism and the secondary planetary reduction mechanism to rotate. This can be used for manual emergency operation in case of power failure or motor failure.

[0044] This invention solves the problem of manual emergency operation of planetary reduction mechanisms with large reduction ratios in the event of power failure or motor malfunction. It retains the self-locking capability of the planetary reduction mechanism while allowing manual unlocking operation in such situations, serving as a means of emergency or maintenance. This invention relates to mechanical speed reduction transmission, specifically a further improved mechanical speed reduction transmission structure based on the planetary reduction mechanism. Two planetary reduction mechanisms are connected in series via a coupling 6. A motor acts as the power component, driving the primary planetary reduction mechanism to rotate, which in turn drives the secondary planetary reduction mechanism via the coupling 6. In the event of a power failure or motor malfunction, a special unlocking tool 8 can be used to rotate the bevel gear fixed to the second transmission flat shaft 4, thereby driving the primary planetary reduction mechanism, coupling 6, and secondary planetary reduction mechanism to rotate, achieving the purpose of emergency operation or maintenance.

[0045] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A manually unlockable mechanical speed reduction mechanism, characterized in that, It includes a drive unit (1), a first reduction unit (2), a second reduction unit (3), a first transmission flat shaft (4), a coupling (6), a second transmission flat shaft (9), and an unlocking gear (5); The output shaft of the drive unit (1) serves as the rotation input end of the first reduction unit (2), the first transmission flat shaft (4) serves as the rotation output shaft of the first reduction unit (2), and the first transmission flat shaft (4) is connected to the second transmission flat shaft (9) through the coupling (6). The second transmission flat shaft (9) serves as the rotation input end of the second reduction unit (3), so that the output shaft of the drive unit (1) rotates under normal working conditions to drive the first reduction unit (2) to rotate, thereby the output end of the first reduction unit (2) drives the first transmission flat shaft (4) to rotate, and then drives the second transmission flat shaft (9) to rotate through the coupling (6), further driving the second reduction unit (3) to rotate, and finally driving the output main shaft (10) of the second reduction unit (3) to rotate. The unlocking gear (5) includes a transmission part (501) and a mounting part (502); the transmission part (501) and the mounting part (502) are integrated. The mounting part (502) is mounted on the second transmission flat shaft (9) through a centrally located shaft hole. The teeth of the transmission part (501) are arranged in a ring around the outside of the mounting part (502) so that when the transmission part (501) rotates as the driving wheel, it will drive the first transmission flat shaft (9), the coupling (6) and the second transmission flat shaft (4) to rotate together, thereby realizing the emergency rotation of the first deceleration unit (2) and the second deceleration unit (3), and finally realizing the emergency rotation of the output main shaft (10).

2. The manually unlockable mechanical reduction mechanism according to claim 1, characterized in that, The mechanical deceleration structure also includes a sleeve (7) and an unlocking tool (8). The transmission part (501) is a bevel gear. The two ends of the sleeve (7) are respectively connected to the first deceleration unit (2) and the second deceleration unit (3), and the unlocking gear (5) is located in the sleeve (7). The outer wall of the sleeve (7) is provided with an unlocking hole (701) for the unlocking tool (8) to pass through. The toothed head (801) of the unlocking tool (8) is also a bevel gear, and the toothed head (801) and the transmission part (501) of the unlocking gear (5) can be meshed and transmitted in a corresponding manner so that the unlocking tool (8) passes through the unlocking hole (701) and the unlocking gear (5) is driven to rotate by the rotation of the toothed head (801) of the unlocking tool (8).

3. The manually unlockable mechanical reduction mechanism according to claim 2, characterized in that, The unlocking tool (8) is a cylindrical metal part with a toothed head (801) with a bevel gear structure or a crank with a toothed head (801) with a bevel gear structure.

4. The manually unlockable mechanical reduction mechanism according to claim 2, characterized in that, One end of the sleeve (7) is pre-set with a countersunk hole, and the sleeve (7) is connected to the second deceleration unit (3) through the countersunk hole by a countersunk screw. The sleeve (7) and the second deceleration unit (3) are fixedly connected by the pre-set countersunk hole position to ensure the relative position of the unlocking hole (701) and the fixing screw hole (11) on the shaft end face of the second deceleration unit (3).

5. The manually unlockable mechanical reduction mechanism according to claim 4, characterized in that, The connection between the sleeve (7) and the first deceleration unit (2) is fixed by a threaded connection, and the coupling (6) is used to eliminate the concentricity deviation when the first transmission flat shaft (4) and the second transmission flat shaft (9) rotate.

6. The manually unlockable mechanical reduction mechanism according to claim 5, characterized in that, Both the first deceleration unit (2) and the second deceleration unit (3) are provided with steps that fit the inner sides of both ends of the sleeve (7). The step of the first deceleration unit (2) has an external thread structure and forms a threaded connection with the internal thread on the inner side of the end of the sleeve (7). The step of the second deceleration unit (3) fits with the end of the sleeve (7) and is fixed with a countersunk screw.

7. The manually unlockable mechanical speed reduction mechanism according to any one of claims 1 to 6, characterized in that, The drive unit (1) is a motor.

8. The manually unlockable mechanical reduction mechanism according to any one of claims 1 to 6, characterized in that, The first deceleration unit (2) is a planetary deceleration mechanism; the second deceleration unit (3) is a planetary deceleration mechanism; The output shaft of the drive unit (1) is connected to the sun gear shaft hole of the planetary reduction mechanism of the first reduction unit (2); The first deceleration unit (2) and the second deceleration unit (3) are arranged on the same axis.

9. The manually unlockable mechanical speed reduction mechanism according to claim 8, characterized in that, The gear teeth in the first reduction unit (2) and the second reduction unit (3) include spur teeth or helical teeth.

10. The manually unlockable mechanical reduction mechanism according to claim 8, characterized in that, The first deceleration unit (2) has a deceleration level of two stages; the second deceleration unit (3) has a deceleration level of three stages. The first deceleration unit (2) and the second deceleration unit (3) together have a deceleration level of five stages, forming a combined mechanical deceleration mechanism with a large deceleration ratio.

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