Clutch mechanism for door opener

Abstract

The utility model provides a kind of clutching mechanism of door opener, including driving motor, the driving motor is connected gear box by motor drive shaft, gear in the gear box and the driving rack of the door opener engage, to drive the door opener to move in translation;The clutching mechanism includes first cam, second cam, motor linkage plate and motor rotating shaft, the driving motor, motor drive shaft and motor linkage plate are configured to be able to rotate around the motor rotating shaft synchronously, the first cam and second cam are integrated, the first cam is configured to be able to contact with the motor linkage plate in rotating process and press or release the motor linkage plate to drive the rotation of driving motor and motor drive shaft, to realize the clutching of gear and driving rack;The second cam is configured to lock or release the motor linkage plate by lock catch;The convex direction of the first cam and the second cam is perpendicular to each other.The utility model structure is small and exquisite, and convenient to operate.

Description

Technical Field

[0001] This utility model relates to a door opener, and more particularly to a clutch mechanism in a door opener that coordinates the movement and stopping of the door opener. Background Technology

[0002] Sliding gate openers are mainly used for opening and closing gates. Most gate openers are equipped with a clutch mechanism for opening and closing. Traditional gate openers incorporate a clutch structure in the interaction between the turbine shaft and the turbine, but this structure is prone to jamming. In addition, some clutch mechanisms require manual reset, which necessitates opening the machine casing, making operation inconvenient, reducing safety, and increasing the risk of structural damage. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a clutch mechanism for a door opener, which mechanically realizes the clutch and disengagement of a sliding door opener, and has a compact structure and is easy to operate.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is:

[0005] A clutch mechanism for a door opener includes a drive motor, which is connected to a gearbox via a motor drive shaft. A gear in the gearbox meshes with a drive rack. When the door opener is started, the gear rotates, which in turn moves the door via the drive rack.

[0006] The clutch mechanism includes a first cam, a second cam, a motor linkage plate, and a motor rotating shaft. The drive motor, motor drive shaft, and motor linkage plate are configured to rotate synchronously around the motor rotating shaft. The first cam and the second cam are integrated. The first cam is configured to contact the motor linkage plate during rotation and press or release the motor linkage plate to drive the drive motor and motor drive shaft to rotate, thereby realizing the engagement and disengagement of the gear and drive rack. The second cam is configured to lock or release the motor linkage plate through a latch. The protrusion directions of the first cam and the second cam are perpendicular to each other.

[0007] Furthermore, it also includes a first return mechanism that passes through the motor linkage plate and can reset the motor linkage plate when the pressure of the first cam is removed.

[0008] Furthermore, the first cam includes a camshaft, the first cam is configured to rotate with the camshaft, and a second cam is provided on at least one of the two sides of the first cam, the convex surface of the second cam facing outward.

[0009] Furthermore, the latch is provided on the outer side of the second cam. The latch is a lug-type latch, and its lug is adapted to the motor linkage plate and configured to hook onto the motor linkage plate.

[0010] Furthermore, the latch includes an inwardly hooking lug, the inner side of which is provided with a protrusion. The protrusion is configured to contact and engage with the raised surface of the second cam. In actual use, the protrusion needs to have a certain width and a certain degree of wear resistance.

[0011] Furthermore, the lug is rotatably mounted on the outside of the second cam via a matching lug shaft, and the lug shaft is provided with a second return mechanism (reset torsion spring).

[0012] Furthermore, the cam surface of the second cam is arranged around the camshaft and falls back at the highest point.

[0013] Furthermore, when the second cam rotates until the protrusion is fully lifted by the cam surface, the lug opens to its maximum angle and releases the motor linkage plate. At this time, the motor linkage plate can be driven by the first cam. Before the lug reaches its maximum angle, the mechanism must be in a self-locking state.

[0014] Furthermore, the angular engagement relationship between the first cam and the second cam is as follows: when the camshaft drives the first cam to rotate, the second cam first pushes open the latch, releasing the motor linkage plate, and then the first cam presses against the motor linkage plate. Of course, the working stroke of the first cam (that is, the distance by which the first cam pushes the motor linkage plate out) needs to be sufficient to make the gear disengage from the rack; this distance can be designed according to the selected gear and rack.

[0015] Furthermore, the first cam is a radial cam, and the second cam is an axial cam. The effective rotation angle of the axial cam does not exceed the rotation angle of the radial cam, thereby satisfying the above-mentioned angle matching relationship. When the axial cam rotates, its cam surface acts outward along the axial direction, while when the radial cam rotates, its cam surface acts outward along the radial direction.

[0016] The beneficial effects of this utility model are: This utility model combines a radial cam and an axial cam into one unit. Through the linkage rotation of the two cams, the motor and rack in the door opener are engaged and disengaged, which not only satisfies the requirement of a compact structure, but also avoids the problem of electrical control in the event of a power outage. Attached Figure Description

[0017] Figure 1 This is an overall structural diagram of the door opener of this utility model.

[0018] Figure 2This is a structural schematic diagram of the present invention from another angle, showing the driving method of the door opener.

[0019] Figure 3 This is an overall structural diagram of the clutch mechanism of this utility model.

[0020] Figure 4 yes Figure 3 A diagram from another angle shows the location of the latch.

[0021] Figure 5 This is a schematic diagram of the parameters of the cam assembly of this utility model.

[0022] Figure 6 This is an overall structural diagram of the cam assembly of this utility model.

[0023] Figure 7 This is an overall structural diagram of the hook of this utility model.

[0024] The following components are labeled in the diagram: base 1, handle 2, drive motor 3, motor drive shaft 4, gear 5, drive rack 6, first cam 7, second cam 8, single-turn threaded surface 81, motor linkage plate 9, motor rotating shaft 10, camshaft 11, lug 12, protrusion 13, first return mechanism 14, lug shaft 15, gearbox 16. Detailed Implementation

[0025] To enable those skilled in the art to better understand and implement the technical solution of this utility model, the present utility model will be described in detail, clearly, and completely below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Furthermore, based on the embodiments of this utility model, any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art to all other embodiments obtained without creative effort should be included within the protection scope of this utility model.

[0026] See attached document Figure 1-2 This utility model provides a clutch mechanism for a door opener, including a base 1, with a handle 2 on one side of the base 1. The handle 2 can be used to manually drive the camshaft. The door opener also includes a drive motor 3, which is connected to a gearbox via a reduction gearbox 16 and a motor drive shaft 4. A gear 5 in the gearbox meshes with a drive rack 6. When the door opener is started, the gear 5 rotates, which drives the door to move via the drive rack 6.

[0027] See attached document Figure 3-4The clutch mechanism includes a first cam 7, a second cam 8, a motor linkage plate 9, and a motor rotating shaft 10. The drive motor 3, the motor drive shaft 4, and the motor linkage plate 9 are configured to rotate synchronously around the motor rotating shaft 10. The first cam 7 and the second cam 8 are integrated. The first cam 7 is configured to contact the motor linkage plate 9 during rotation and press or release the motor linkage plate 9 to drive the drive motor 3 and the motor drive shaft to rotate, thereby realizing the engagement and disengagement of the gear 5 and the drive rack 6. When the gear 5 and the drive rack 6 are engaged, the door opener can be driven by the drive motor to perform a translational opening or closing. When the gear 5 and the drive rack 6 are disengaged, the door opener is locked and cannot move.

[0028] In some embodiments, the first cam 7 includes a camshaft 11, the first cam 7 is rotatable with the camshaft 11, and a second cam 8 is respectively provided on both sides of the first cam 7, the convex surface of the second cam 8 faces outward, the first cam 7 is a radial cam, the second cam 8 is an axial cam, and the convex directions of the two are perpendicular.

[0029] The second cam 8 is provided with the latches on its outer side. The latches are ear-type latches, and their ear 12 is adapted to the motor linkage plate 9. When the ear 12 is lowered, it can hook the motor linkage plate 9. At this time, the door opener is in a movable state. Turning on the motor can drive the door opener to open or close the door.

[0030] In some embodiments, the latch includes a pair of hooks 12 that are arranged in pairs and hook inward. The inner sides of the pair of hooks 12 are provided with protrusions 13, which are configured to contact and engage with the raised surface of the second cam 8, so that the hooks can be pushed outward or released as the second cam 8 rotates. Figure 3 and Figure 4 The image shows two positions of the loop 12.

[0031] It should be noted that in this embodiment, double-sided hanging ears are used as an example, but the present invention does not limit the number of hanging ears. As long as they can play the role of hooking and loosening, single-sided or multi-sided hanging ears can also be used.

[0032] In some implementations, such as Figure 5As shown, the raised surface of the second cam 8 is a single-turn threaded surface 81 that does not complete a full turn. The threaded surface 81 is arranged around the camshaft 11 and falls back at its highest point. When the second cam 8 rotates to the point where the raised surface is at its highest point, the lug 12 opens to its maximum angle and releases the motor linkage plate 9. At this time, the motor linkage plate 9 can be driven by the first cam 7. The second cams 8 are arranged in pairs with the same arrangement of rotating surfaces, and the two lugs 12 are also arranged symmetrically. Therefore, when the camshaft 11 rotates, the two second cams 8 rotate synchronously, and the two lugs 12 open synchronously. When the motor linkage plate 9 is hooked by the lug 12, it cannot be pressed down by the first cam 7. Therefore, the angular relationship between the first cam 7 and the second cam 8 satisfies the following: when the camshaft 11 drives the cam group composed of the first cam and the second cam to rotate, the second cam 8 moves first, pushes open the latch, and releases the motor linkage plate 9. Then the first cam 7 presses against the motor linkage plate 9. Therefore, the cam surface of the first cam 7 includes a flat surface and an arc surface. When the second cam 8 has not reached the release angle, the first cam 7 is in an ineffective rotation angle. That is, the outer surface of the first cam does not release pressure to the motor linkage plate 9.

[0033] In some embodiments, to meet the aforementioned angular position matching conditions of the cam assembly, such as Figure 5 As shown, the effective rotation angle of the axial cam (second cam) does not exceed 95°, the effective rotation angle of the radial cam (first cam) does not exceed 109°, and the included angle between the effective rotation angles of the axial cam and the radial cam is not less than 95°.

[0034] In some embodiments, the clutch mechanism of this utility model further includes a first return mechanism 14, which is a return spring that can pass through and abut against the motor linkage plate 9. When the abutting force of the first cam 7 is removed, the return spring can push upward and reset the motor linkage plate 9.

[0035] In some embodiments, the lugs 12 are rotatably mounted on the two outer sides of the second cam 8 via their respective lug shafts 15. The lug shafts 15 are each provided with a second return mechanism. The second return mechanism can be a torsion spring sleeved on the shaft. When the force pushing outward from the second cam is removed, the lugs can be reset under the action of the torsion spring. When the motor linkage plate returns to its original position, the lugs are automatically hooked.

[0036] In some implementations, the second return mechanism may also be a compression spring located on the outside of the free end of the lug, which resets the lug by pressing inward.

[0037] In some implementations, a second return mechanism may not be required, and the loop may be reset by its own gravity.

[0038] The working process of this utility model is as follows: When the door opener is in operation, the hook 12 hooks onto the motor linkage plate 9, and the gear 5 in the gearbox and the rack of the door opener are engaged. At this time, the power switch can be turned on at any time to drive the door opener to open or close the door via the drive motor. When locking is required, the handle 2 on the base 1 is pulled out, and the cam shaft 11 is rotated by the handle, which drives the cam group (first cam and second cam) to rotate. The second cam 8 first pushes the hook 12 outward to release the motor linkage plate 9, and then the first cam rotates downward to contact the motor linkage plate 9, further rotating and pressing down the motor linkage plate 9. The motor linkage plate 9 drives the drive motor 3 and the motor drive shaft 4 to rotate around the motor rotation shaft 10. Since the cam size is small, the rotation angle generally does not exceed 15°. Figure 1 The two motors are shown in different positions. This does not affect the normal operation of the drive motor. At this time, the motor drive shaft 10 drives the gear 5 to rotate together, causing the gear 5 and the rack to separate. At this time, the door opener cannot be driven. If you need to start the door opener again, turn the handle 2 back to reset the first cam 7, the second cam 8, the motor linkage plate 9 and the hanging ear 12, and the gear 5 and the drive rack 6 will return to the meshing state.

[0039] The linkage between the first and second cams is one of the core innovations of this invention. Figure 7 As shown, the protrusion 13 includes two contact surfaces (the chamfered area between the surfaces). When the cam assembly is activated, as... Figure 6 As shown, the position marked 8 at the lower left corner of the second cam first contacts the contact surface under the protrusion 13. At this time, the hook begins to open outward, and the outer surface of the first cam ( Figure 5 The ending position of the 95° angle, that is Figure 5 The second cam begins to contact the surface of the motor linkage plate at a starting position (95.22° angle). However, at this point, it is only a contact of the circular surface and has not yet reached the cam surface of the first cam. Therefore, it is merely contact and does not exert a downward pressing force on the motor linkage plate until the second cam rotates to... Figure 6 The small line segment next to the position marked 8 in the lower left corner ( Figure 5 When the hook opens to its highest point at the starting position (95° angle) and the protrusion 13 come into contact, the first cam also rotates to its highest position. Figure 5 At the end position of 95.22° angle, which is also the starting position of 109.78° angle, the motor linkage plate disengages from the lock, and the cam surface of the first cam officially begins to act, pushing downward against the motor linkage plate. During this process, due to the action of the cam surface of the second cam, the hook remains in the open state and does not interfere with the movement of the motor linkage plate. The first cam... Figure 7There is a plane at the position marked 7. When the first cam rotates to the plane and contacts the motor linkage plate, it is in the "disengaged" locked position in the clutch state. This ensures that the cam group, motor linkage plate and other structures are in a relatively stable state when the door opener is in the opening action, and there will be no structural interference that would affect the operation of the door opener.

[0040] It should be noted that the angles listed in this embodiment are merely examples; in actual operation, the actual angles will be set... Figure 5 Angle α is defined as 95°, and its corresponding radian is the angle the second cam rotates from the moment it contacts the hook until it reaches its maximum position. Angle β is defined as 95.22°, and its corresponding radian is the angle the first cam rotates from the moment it begins to rotate until it can push the motor linkage plate outward. Angle γ is defined as 109.78°, and its corresponding radian is the angle the first cam rotates from pushing the motor linkage plate outward until it pushes the motor linkage plate outward to its maximum position. Generally, β ≥ α, and α + β + γ < 360°. The significance of setting these angles is that the radians corresponding to angles α and β represent the area where the first and second cams rotate synchronously. It is necessary to ensure that the first cam only begins to apply force to the motor linkage plate after the second cam has fully released the hook, avoiding premature pressure that could cause excessive force at the moment of release and damage to the mechanism. Therefore, angle β is generally not less than angle α. However, if the protrusion is large enough, or if there is a gap between the protrusion and the hook, and the second cam needs more space to lift the hook, then angle β may be less than angle α. In summary, the first cam only begins to apply force to the motor linkage plate (initiating the clutch operation) when the hook is disengaged. Before that, although the first cam is in contact with the motor linkage plate, no force is applied.

[0041] In some preferred embodiments, a plane can also be set at the position where the upper planes of the second cam and the first cam are opposite each other. On this plane, the second cam is just in contact with the upper surface of the motor linkage plate. This is used to transmit a brief stable (locked) feel to the handle and give the operator a prompt that it is in position. This plane is not necessary, but it is just an optimization design. However, the plane of the first cam is more important. It is used to provide overall structural stability and prevent maloperation such as cam rotation. Therefore, the plane of the first cam is wider than the plane of the second cam.

[0042] In some preferred methods, Figure 5 The dark area (shaded area) on the second cam surface is the return area of ​​the second cam. There is a short distance on one side of the return area, which is the area where the hook hooks onto the motor linkage plate (locking area). The return area usually needs an angle of 5-20°, which can be set according to the actual structure. If the angle of the return area is set to θ, then α+β+γ+θ<360°.

[0043] In addition, it should be noted that, Figure 5The shape corresponding to the hidden part of the first cam can be arbitrarily changed according to actual needs. Figure 6 The shape in the middle is just for design convenience and is mirrored, because after passing the stabilizing surface (plane) of the first cam, the rest of the parts will not participate in the work, and the first cam will rotate, so the shape of the subsequent parts is not important.

[0044] In some preferred embodiments, a micro-motion structure may also be provided on the base 1 to assist in the re-engagement of the gear 5 and the drive rack 6.

[0045] Furthermore, this invention does not exclude other auxiliary applications of Hall sensors and photoelectric sensors.

[0046] In some preferred embodiments, a frame may be provided above the cam assembly of this invention for mounting electrical components.

[0047] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A clutch mechanism of a door opener characterized by comprising: The device includes a drive motor, which is connected to a gearbox via a motor drive shaft. The gears in the gearbox mesh with a drive rack. When the door opener is started, the gears rotate, which in turn drive the door to move via the drive rack. The clutch mechanism includes a first cam, a second cam, a motor linkage plate, and a motor rotating shaft. The drive motor, the motor drive shaft, and the motor linkage plate are configured to rotate synchronously around the motor rotating shaft. The first cam and the second cam are connected as one unit, and the convex directions of the first cam and the second cam are perpendicular to each other.

2. The clutch mechanism of claim 1, wherein It also includes a first return mechanism that passes through the motor linkage plate and can reset the motor linkage plate when the pressure of the first cam is removed.

3. The clutch mechanism of claim 1, wherein The first cam includes a camshaft and is configured to rotate with the camshaft. A second cam is provided on at least one of the two sides of the first cam, with the convex surface of the second cam facing outward.

4. The clutch mechanism of a door opener according to claim 3, characterized in that, A latch is provided on the outer side of the second cam. The latch is a lug-type latch, and its lug is adapted to the motor linkage plate and configured to hook onto the motor linkage plate.

5. A clutch mechanism for a door opener as defined in claim 4, wherein The latch includes an inwardly hooking lug, the inner side of which has a protrusion configured to engage with the raised surface of the second cam.

6. A clutch mechanism for a door opener as defined in claim 5, wherein The lugs are rotatably mounted on the outside of the second cam via matching lug shafts, and the lug shafts are respectively provided with second return mechanisms.

7. The clutch mechanism of a door opener according to claim 5, characterized in that, The cam surface of the second cam is arranged around the cam shaft and falls back at the highest point.

8. The clutch mechanism of claim 7, wherein the clutch mechanism is a door opener. When the second cam rotates until the protrusion is fully lifted by the cam surface, the lug opens to its maximum angle and releases the motor linkage plate. At this time, the motor linkage plate can be driven by the first cam.

9. The clutch mechanism of a door opener according to claim 4, characterized in that, The angular relationship between the first cam and the second cam is as follows: when the camshaft drives the first cam to rotate, the second cam first pushes open the latch, releasing the motor linkage plate, and then the first cam presses against the motor linkage plate.

10. The clutch mechanism of claim 1 or 9, wherein The first cam is a radial cam, and the second cam is an axial cam. When the axial cam rotates, its cam surface acts outward along the axial direction, while when the radial cam rotates, its cam surface acts outward along the radial direction.

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