Groove-digging-free electric door opener

Abstract

The grooving-free type electric door opener comprises a shell, a motor, a transmission mechanism, a rotating shaft and a junction box, the rotating shaft is sleeved with a first gear, one end of the transmission mechanism is connected with an output shaft of the motor, the other end of the transmission mechanism is matched with the first gear, one end of the rotating shaft is located in the shell, and the other end of the rotating shaft penetrates through the shell and then extends into the junction box; a conducting ring is arranged in the junction box, a hollow hole is formed in the rotating shaft, the hollow hole penetrates through one end of the rotating shaft, the conducting ring is arranged on the outer side of the rotating shaft in a sleeving mode, conducting columns are arranged on through holes in the two sides of the rotating shaft, and the other ends of the conducting columns abut against the conducting ring. And the wire penetrates into the hollow hole, is connected with the conductive column and then is led out through the conductive ring, so that the wire can be conveniently connected with an external power supply and a circuit board. When the inner structure of the shell needs to be maintained, the shell part is directly connected, separation of the conductive column and the conductive ring is achieved, connection between the conductive ring and an external circuit board and connection between the conductive ring and a power source are not affected, and difficulty in reinstallation is greatly simplified.

Description

Technical Field

[0001] The invention belongs to a door closer, and in particular relates to a groove-free electric door opener. Background Art

[0002] Automatic doors are used in many places nowadays. The opening and closing of the door leaf is controlled by a motor, which is connected to an external power supply and a circuit board. The operator's opening and closing information is transmitted to the motor through the circuit board, so that the motor can execute the corresponding instructions. Therefore, the motor needs to be connected to the power line and the signal line, and the existing motor wiring is very messy when it is actually installed on site. Therefore, when the motor needs to be repaired, the entire floor spring and the signal board connected to the motor through the wire need to be completely removed for maintenance, which is inconvenient for maintenance and installation. Summary of the invention

[0003] The object of the present invention is to provide a groove-free electric door opener that can solve at least one of the above-mentioned problems.

[0004] According to one aspect of the present invention, a groove-free electric door opener is provided, including a shell, a motor, a transmission mechanism, a rotating shaft and a junction box. The junction box is located below the shell, and the motor and the transmission mechanism are both arranged in the shell. A first gear is sleeved on the rotating shaft, one end of the transmission mechanism is connected to the output shaft of the motor, and the other end cooperates with the first gear. One end of the rotating shaft is located in the shell, and the other end penetrates through the shell and extends into the junction box. A power line and a signal line are electrically connected to the motor. A conductive ring is provided in the junction box. The rotating shaft is a hollow structure with a hollow hole. The hollow hole penetrates one end of the rotating shaft. The conductive ring is sleeved on the outside of the rotating shaft. Through holes are opened on both sides of the rotating shaft, and the through holes are connected to the hollow holes. Conductive columns are provided on the through holes on both sides, one end of the conductive column extends into the hollow hole, and the other end penetrates through the through hole and extends out. The other end of the conductive column abuts against the conductive ring and is electrically connected, and the power line and the signal line are connected to the conductive columns on both sides.

[0005] The beneficial effects of the present invention are as follows: by setting the rotating shaft as a hollow structure and providing a conductive column and a conductive ring, the power line and the signal line connected to the motor can be inserted into the hollow hole and connected to the conductive column, and then connected to the conductive column and the conductive ring, and then connected to the conductive ring, so that the power line and the signal line can be led out in the junction box, which is convenient for connecting to an external power supply and a circuit board. Therefore, through the hollow structure of the rotating shaft, the direction of the wire can be limited, the messy wire routing can be avoided, and the wiring is convenient; at the same time, through the contact and conduction between the conductive column and the wire ring, when the motor fails and needs to be repaired, the shell part can be directly taken out, that is, the motor and the rotating shaft part can be pulled out, so that the separation of the conductive column and the conductive ring is realized, and the separation of the shell and the junction box is realized, without affecting the connection between the conductive ring and the external circuit board and the power supply, which greatly simplifies the difficulty of reinstallation and is convenient for maintenance and installation.

[0006] In some embodiments, the groove-free electric door opener further includes an outlet plate, the outlet plate is located in the junction box, a connection hole is provided on the outlet plate, the outlet plate is located on one side of the conductive ring, the conductive ring is located between the outlet plate and the first gear, and the other end of the rotating shaft passes through the conductive ring and matches with the connection hole. Thus, the outlet plate and the rotating shaft are matched.

[0007] In some embodiments, the junction box includes a junction base, a mounting groove is provided on the junction base, the outlet plate is located in the mounting groove, the length dimension of the mounting groove is greater than the length dimension of the outlet plate, the width dimension of the mounting groove is greater than the width dimension of the outlet plate, and a through hole is provided on the junction base, and the through hole corresponds to the connection hole. Thus, by providing the mounting groove and by reasonably setting the size, the position of the outlet plate can be fine-tuned to ensure that the connection hole can be aligned with the through hole, so as to facilitate the accurate installation of the rotating shaft.

[0008] In some embodiments, the conductive posts at the through holes on both sides are respectively the first conductive post and the second conductive post, the first conductive post and the second conductive post have the same structure, conductive sheets are provided on both sides of the inner wall of the conductive ring, and the conductive posts on each side are respectively in contact with the conductive sheets on the corresponding side. Thus, by providing the conductive sheets, the electrical connection with the conductive posts is facilitated, and at the same time, it is convenient to connect the external wires to the conductive sheets, which is convenient for wiring.

[0009] In some embodiments, two conductive rods are provided at both ends of the first conductive column, two conductive sheets are provided on each side of the inner wall of the conductive ring, the conductive sheets are provided corresponding to the conductive rods, there are two power lines, and there are two signal lines, one of which is connected to a conductive rod of the first conductive column, the other power line is connected to a conductive rod in the diagonal direction of the second conductive column, and the two signal lines are connected to the remaining two conductive rods of the two conductive columns. Thus, by providing the conductive rods, it is convenient to connect the power line and the signal line separately, and the power lines are connected diagonally, which effectively avoids the circuit line breakdown phenomenon and is conducive to improving the overall service life.

[0010] In some embodiments, the outlet plate is provided with two outlet holes, which are located on both sides of the connection hole, and the two outlet holes are located below the conductive sheets on both sides of the inner wall of the conductive ring, and are connected to the through hole. Thus, after the wire is connected through the conductive sheet, it is pulled out through the outlet hole and finally pulled out through the through hole, which improves the neatness of the wiring.

[0011] In some embodiments, the lower end surface of the conductive ring is provided with a plug, and the outlet plate is provided with a socket, and the plug is inserted into the socket for matching. Thus, the matching of the plug and the socket facilitates the rapid positioning and matching of the conductive ring and the outlet plate.

[0012] In some embodiments, the upper end surface of the housing is provided with a first wire groove, and the lower end surface of the wiring base is provided with a second wire groove, the first wire groove is connected to the hollow hole, and the second wire groove is connected to the through hole. Thus, by providing the first wire groove, it is convenient for the wire from the motor to the hollow hole to be routed along the first wire groove; by providing the second wire groove, it is convenient for the wire to be routed along the second wire groove after being pulled out through the through hole.

[0013] In some embodiments, the transmission mechanism includes a first bevel gear, a second bevel gear, and a second gear, wherein the second bevel gear and the second gear are double gears, the first bevel gear is sleeved on the output shaft of the motor, the second bevel gear is meshed with the first bevel gear, and the second gear is meshed with the first gear. Thus, the motor can realize the rotation of the shaft through the transmission of each gear.

[0014] In some embodiments, the groove-free electric door opener further includes a limit bearing, which is sleeved on the rotating shaft, and the upper end face of the limit bearing abuts against the first gear, and the lower end face abuts against the conductive ring. Thus, by providing the limit bearing, the conductive ring can be clamped and fixed under the action of the outlet plate and the limit bearing, thereby ensuring the contact between the conductive column and the conductive ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the groove-free electric door opener of the present invention.

[0016] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure.

[0017] Figure 3 It is a structural schematic diagram of an implementation mode of the groove-free electric door opener of the present invention.

[0018] Figure 4 It is a structural schematic diagram of another embodiment of the groove-free electric door opener of the present invention.

[0019] Figure 5It is a structural schematic diagram of the remaining structures of the groove-free electric door opener of the present invention after the shell is removed.

[0020] Figure 6 It is a structural schematic diagram of a wiring base in a trench-free electric door opener of the present invention.

[0021] Figure 7 It is a structural schematic diagram of another viewing angle of the wiring base in the trench-free electric door opener of the present invention.

[0022] Figure 8 It is a structural schematic diagram of the outlet board in the groove-free electric door opener of the present invention.

[0023] Fig. 9 It is a structural schematic diagram of the matching of the rotating shaft and the conductive ring in the groove-free electric door opener of the present invention.

[0024] Fig.10 yes Fig. 9 Schematic diagram of the cross-sectional structure.

[0025] Fig.11 It is a structural schematic diagram of the rotating shaft of the groove-free electric door opener of the present invention.

[0026] Fig.12 It is a structural schematic diagram of the cooperation between the conductive ring and the conductive column in the groove-free electric door opener of the present invention.

[0027] Fig.13 It is a structural schematic diagram of the first conductive column in the trench-free electric door opener of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] Reference Figure 1 , Figure 2 , Figure 5 , Fig.10 and Fig.11The groove-free electric door opener comprises a housing 1, a motor 2, a transmission mechanism 3, a rotating shaft 4 and a junction box 5. The junction box 5 is located below the housing 1. The motor 2 and the transmission mechanism 3 are both arranged in the housing 1. The housing of the motor 2 is fixed in the housing 1. The first gear 6 is sleeved on the rotating shaft 4, one end of the transmission mechanism 3 is connected to the output shaft of the motor 2, and the other end cooperates with the first gear 6, one end of the rotating shaft 4 is located in the housing 1, and the other end penetrates the housing 1 and then extends into the junction box 5, the motor 2 is electrically connected with a power line and a signal line, a conductive ring 7 is provided in the junction box 5, and the junction box 5 is provided with a conductive ring 7, the rotating shaft 4 is a hollow structure, and is provided with a hollow hole 41, the hollow hole 41 penetrates one end of the rotating shaft 4, the conductive ring 7 is sleeved on the outside of the rotating shaft 4, through holes 42 are opened on both sides of the rotating shaft 4, the through holes 42 are connected with the hollow hole 41, and conductive columns 8 are provided on the through holes 42 on both sides, one end of the conductive column 8 extends into the hollow hole 41, and the other end penetrates the through hole 42 and then extends out, the other end of the conductive column 8 abuts against the conductive ring 7 and is electrically connected, and the power line and the signal line are connected to the conductive columns 8 on both sides. Among them, the first gear 6 and the rotating shaft 4 can be an integrally formed structure.

[0030] When the groove-free electric door opener of the present invention is used, the junction box 5 is installed on the profile of the door frame, or a mounting position is reserved on the door frame for placing the junction box 5, and the junction box 5 is fixed to the door frame by screwing. Then, the housing 1 is connected with the junction box 5, and the other end of the rotating shaft 4 is inserted into the junction box 5 to achieve the fixation of the rotating shaft 4 in the junction box 5. Therefore, when the motor 2 is working, it drives the transmission mechanism 3 to rotate. Since the rotating shaft 4 is fixed relative to the junction box 5, the first gear 6 does not rotate either. Therefore, the transmission mechanism 3 and the motor 2 rotate relative to the rotating shaft 4. Since the motor 2 is fixed in the housing 1, the housing 1 also rotates relative to the rotating shaft 4.

[0031] In actual use, clamping plates 20 (such as Figure 3 The glass door can be clamped between the clamps 20 on both sides and used as a glass door clamp. The entire glass door clamp can be installed above or below the glass door. The shell 1 and the clamp 20 rotate together with the glass door. When the door leaf is made of wood or other materials that are easy to punch, mounting plates 30 (such as Figure 4 As shown), the mounting plate 30 and the door leaf are also fixed by screws, and when the door leaf rotates, the housing 1 rotates together with the door leaf.

[0032] Therefore, the excavation-free electric door closer does not need to be pre-buried underground, is easy to install, and can be applied to the installation of doors of different materials, with a wide range of applications.

[0033] like Figure 2 and Figure 8As shown, the groove-free electric door opener also includes an outlet plate 9, which is located in the junction box 5. The outlet plate 9 is provided with a connection hole 91. The outlet plate 9 is located on one side of the conductive ring 7. The conductive ring 7 is located between the outlet plate 9 and the first gear 6. The other end of the rotating shaft 4 passes through the conductive ring 7 and matches with the connection hole 91. The shape of the connection hole 91 is consistent with the shape of the other end of the rotating shaft 4, so that after the rotating shaft 4 matches with the connection hole 91, the rotating shaft 4 is fixed on the junction box 5.

[0034] like Figure 2 , Figure 6 to Figure 8 As shown, the junction box 5 includes a junction base 51, a mounting groove 511 is provided on the junction base 51, the outlet plate 9 is located in the mounting groove 511, the length dimension of the mounting groove 511 is greater than the length dimension of the outlet plate 9, the width dimension of the mounting groove 511 is greater than the width dimension of the outlet plate 9, and a through hole 513 is provided on the junction base 51, and the through hole 513 corresponds to the connecting hole 91.

[0035] When the outlet plate 9 is installed on the wiring base 51, since the size of the installation groove 511 is relatively large relative to the size of the outlet plate 9, the position of the outlet plate 9 in the installation groove 511 can be adjusted so that the position of the connection hole 91 is aligned with the position of the through hole 513, which facilitates the insertion of the rotating shaft 4 into the connection hole 91 for matching. When the position of the outlet plate 9 is adjusted to the right position, screws are screwed into the surrounding side walls of the installation groove 511, and the screws on each side abut against the surrounding side surfaces of the outlet plate 9 to fix the position of the outlet plate 9 and prevent the outlet plate 9 from moving, thereby realizing the installation of the outlet plate 9. Therefore, by providing the installation groove 511, the position of the outlet plate 9 can be easily adjusted, so as to facilitate the fine adjustment of the position during actual installation.

[0036] like Figure 2 , Figures 9 to 13 As shown, the conductive pillars 8 at the through holes 42 on both sides are respectively the first conductive pillar 81 and the second conductive pillar 82, the first conductive pillar 81 and the second conductive pillar 82 have the same structure, conductive sheets 71 are provided on both sides of the inner wall of the conductive ring 7, and the conductive pillars 8 on each side are respectively abutted against the conductive sheets 71 on the corresponding side.

[0037] When the motor 2 of the groove-free electric door opener of the present invention is connected, there are two power lines, namely the positive wire and the negative wire; there are also two signal lines. One of the power lines is connected to the first conductive column 81, and the other power line is connected to the second conductive column 82. The two signal lines are also connected to the two conductive columns 8 respectively. In order to facilitate the connection between each wire and the conductive column 8, the wire is inserted into the hollow hole 41, and then passes through the through holes 42 on both sides, and then connected to the conductive column 8 on the corresponding side. After the wire and the signal line are connected to the conductive column 8, the conductive column 8 is inserted into the corresponding through hole 42, and finally the conductive ring 7 is set on the outside of the rotating shaft 4, so that the conductive column 8 and the conductive ring 7 are in contact and conductive.

[0038] Two conductive rods 811 are provided at both ends of the first conductive column 81, two conductive sheets 71 are provided on each side of the inner wall of the conductive ring 7, and the conductive sheets 71 are provided corresponding to the conductive rods 811. There are two power lines and two signal lines, one of which is connected to a conductive rod 811 of the first conductive column 81, the other is connected to a conductive rod 811 in the diagonal direction of the second conductive column 82, and the two signal lines are connected to the remaining two conductive rods 811 of the two conductive columns 8. By connecting the positive and negative poles of the power lines diagonally, current breakdown is avoided and the normal connection of the power supply is ensured.

[0039] The conductive sheet 21 can be provided to facilitate the external connection of the conductive ring 7 with the wire and the signal line, thereby facilitating the connection of the power supply and the signal. During the actual wiring, the power supply wire and the signal line are connected to the conductive sheet 71 to facilitate the transmission of power and signals.

[0040] The outlet plate 9 is provided with two outlet holes 93, which are respectively located on both sides of the connection hole 91. The two outlet holes 93 are respectively located below the conductive sheets 71 on both sides of the inner wall of the conductive ring 7 and are connected to the through hole 513. Therefore, after the power line and the signal line are connected from the conductive sheet 71, they pass through the outlet holes 93, so that the power line and the signal line are pulled out neatly.

[0041] The lower end surface of the conductive ring 7 is integrally formed with a plug post 72, and a plug hole 92 is provided on the outlet plate 9, and the plug post 72 is inserted into the plug hole 92 for matching. Therefore, after the outlet plate 9 is installed and fixed on the wiring base 51, the plug post 72 of the conductive ring 7 is aligned with the plug hole 92 and inserted, so that the conductive ring 7 is installed on the outlet plate 9, and the installation and matching are convenient.

[0042] The groove-free electric door opener of the present invention further comprises a limit bearing 10 , which is sleeved on the rotating shaft 4 , and the upper end surface of the limit bearing 10 abuts against the first gear 6 , and the lower end surface abuts against the conductive ring 7 .

[0043] In actual use, a limit bearing 10 is sleeved on the rotating shaft 4, and the upper end face of the limit bearing 10 abuts against the lower end face of the first gear 6, and the lower end face of the limit bearing 10 abuts against the upper end face of the conductive ring 7, so that the conductive ring 7 is clamped between the outlet plate 9 and the limit bearing 10, thereby ensuring the stability of the position of the conductive ring 7, thereby ensuring that the conductive column can remain connected to the conductive ring.

[0044] The upper end surface of the housing 1 is provided with a first wire groove 11, and the lower end surface of the wiring base 51 is provided with a second wire groove 512. The first wire groove 11 is connected to the hollow hole 41, and the second wire groove 512 is connected to the through hole 513. Therefore, the power line and signal line pulled out from the motor 2 pass through the rear end of the housing (close to one end of the motor), run along the first wire groove 11, and then pass into the hollow hole 41; the power line and wire pulled out from the outlet hole 93 pass through the through hole, and run along the second wire grooves 512 on both sides of the through hole, so that the wires are guided and run, and the wires are avoided from being messy.

[0045] When the motor 2 in the groove-free electric door opener of the present invention fails and needs to be repaired, the entire housing 1 is pulled out, so that the rotating shaft 4 is separated from the conductive ring 7, and the conductive ring 7, the outlet plate 9 and the wiring base 51 in the junction box 5 are all retained on the door frame. When the rotating shaft 4 is pulled out with the housing 1, the conductive column 8 is pulled out together. After the structural inspection in the housing 1 is completed, the wiring conductive column 8 is inserted into the conductive ring 7 together with the rotating shaft 4, so that the conductive column 8 is connected to the conductive ring 7, and the electrical connection is completed. The installation and disassembly are convenient, and there is no need to remove the entire circuit, which greatly simplifies the disassembly process.

[0046] like Figure 2 and Figure 5 As shown, the transmission mechanism 3 includes a first bevel gear 31, a second bevel gear 32 and a second gear 33. The second bevel gear 32 and the second gear 33 are double gears. The first bevel gear 31 is sleeved on the output shaft of the motor 2, the second bevel gear 32 is meshed with the first bevel gear 31, and the second gear 33 is meshed with the first gear 6. In actual use, a reduction box 40 is connected to the output end of the motor 2. The output speed of the motor can be adjusted by the reduction box 40 to avoid the door leaf opening and closing speed being too fast; the first bevel gear 31 is sleeved on the output shaft of the reduction box. Through the action of the motor 2, the gears in the transmission mechanism 3 can be driven to rotate. Since the rotating shaft 4 continues to be fixed, the transmission mechanism 3 rotates relative to the rotating shaft 4, and drives the motor 2 to rotate with the transmission mechanism 3. The motor 2 acts on the housing 1, so that the housing 1 also rotates synchronously, so that the door leaf fixed on the housing 1 rotates together, that is, the door clamp rotates with the door leaf, meeting the use requirements.

[0047] The above are only preferred embodiments of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. The groove-free electric door opener is characterized by: The invention comprises a housing (1), a motor (2), a transmission mechanism (3), a rotating shaft (4) and a junction box (5), wherein the junction box (5) is located below the housing (1), the motor (2) and the transmission mechanism (3) are both arranged in the housing (1), a first gear (6) is sleeved on the rotating shaft (4), one end of the transmission mechanism (3) is connected to the output shaft of the motor (2), and the other end is matched with the first gear (6), one end of the rotating shaft (4) is located in the housing (1), and the other end passes through the housing (1) and then extends into the junction box (5), the motor (2) is electrically connected to a power line and a signal line, a conductive ring (7) is arranged in the junction box (5), and the junction box (5) is electrically connected to the motor (2), and a conductive ring (7) is arranged in the junction box (5). ) is provided with a conductive ring (7), the rotating shaft (4) is a hollow structure and is provided with a hollow hole (41), the hollow hole (41) passes through one end of the rotating shaft (4), the conductive ring (7) is sleeved on the outer side of the rotating shaft (4), through holes (42) are opened on both sides of the rotating shaft (4), the through holes (42) are connected with the hollow hole (41), and conductive columns (8) are provided on the through holes (42) on both sides, one end of the conductive column (8) extends into the hollow hole (41), and the other end passes through the through hole (42) and then extends out, the other end of the conductive column (8) abuts against the conductive ring (7) and is electrically connected, and the power line and the signal line are connected to the conductive columns (8) on both sides.

2. The groove-free electric door opener according to claim 1, characterized in that: It also includes an outlet plate (9), the outlet plate (9) is located in the junction box (5), a connecting hole (91) is provided on the outlet plate (9), the outlet plate (9) is located on one side of the conductive ring (7), the conductive ring (7) is located between the outlet plate (9) and the first gear (6), and the other end of the rotating shaft (4) passes through the conductive ring (7) and matches with the connecting hole (91).

3. The groove-free electric door opener according to claim 2, characterized in that: The junction box (5) comprises a junction base (51), the junction base (51) is provided with a mounting groove (511), the outlet plate (9) is located in the mounting groove (511), the length dimension of the mounting groove (511) is greater than the length dimension of the outlet plate (9), the width dimension of the mounting groove (511) is greater than the width dimension of the outlet plate (9), and the junction base (51) is provided with a through hole (513), and the through hole (513) corresponds to the connection hole (91).

4. The groove-free electric door opener according to claim 3, characterized in that: The conductive posts (8) at the through holes (42) on both sides are respectively a first conductive post (81) and a second conductive post (82); the first conductive post (81) and the second conductive post (82) have the same structure; conductive sheets (71) are provided on both sides of the inner wall of the conductive ring (7); the conductive posts (8) on each side are respectively in contact with the conductive sheets (71) on the corresponding side.

5. The groove-free electric door opener according to claim 4, characterized in that: Two conductive rods (811) are provided at both ends of the first conductive column (81), two conductive sheets (71) are provided on each side of the inner wall of the conductive ring (7), the conductive sheets (71) are arranged corresponding to the conductive rods (811), there are two power lines and two signal lines, one of which is connected to a conductive rod (811) of the first conductive column (81), the other is connected to a conductive rod (811) in a diagonal direction of the second conductive column (82), and the two signal lines are connected to the remaining two conductive rods (811) of the two conductive columns (8).

6. The groove-free electric door opener according to claim 5, characterized in that: The outlet plate (9) is provided with two outlet holes (93), which are respectively located on both sides of the connection hole (91). The two outlet holes (93) are respectively located below the conductive sheets (71) on both sides of the inner wall of the conductive ring (7) and are connected to the through hole (513).

7. The groove-free electric door opener according to claim 6, characterized in that: The lower end surface of the conductive ring (7) is provided with an insertion column (72), and the outlet plate (9) is provided with an insertion hole (92), and the insertion column (72) is inserted into the insertion hole (92) for matching.

8. The groove-free electric door opener according to any one of claims 3 to 7, characterized in that: The upper end surface of the housing (1) is provided with a first wire groove (11), and the lower end surface of the wiring base (51) is provided with a second wire groove (512); the first wire groove (11) is connected to the hollow hole (41), and the second wire groove (512) is connected to the through hole (513).

9. The groove-free electric door opener according to any one of claims 1 to 7, characterized in that: The transmission mechanism (3) comprises a first bevel gear (31), a second bevel gear (32) and a second gear (33); the second bevel gear (32) and the second gear (33) are double gears; the first bevel gear (31) is sleeved on the output shaft of the motor (2); the second bevel gear (32) is meshed with the first bevel gear (31); and the second gear (33) is meshed with the first gear (6).

10. The groove-free electric door opener according to claim 9, characterized in that: It also includes a limit bearing (10), which is sleeved on the rotating shaft (4), the upper end surface of the limit bearing (10) abuts against the first gear (6), and the lower end surface abuts against the conductive ring (7).

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