Explosion-proof worm and gear transmission structure

Abstract

The utility model relates to the technical field of worm gears and worms, and discloses an explosion-proof worm gear and worm transmission structure which comprises a shell, a mounting seat located at the bottom of the shell and used for mounting and a driving mechanism located in the shell, the top of the driving mechanism is connected with a rotating seat, and the rotating seat is driven by the driving mechanism to rotate. According to the utility model, the explosion-proof surface of the copper sleeve and the explosion-proof surface in the shell are matched with each other to form the explosion-proof combination surface I, the explosion-proof surface is designed in the shell, and the explosion-proof surface outside the shell and the explosion-proof surface in the shell are matched with each other to form the explosion-proof combination surface III, so that flame generated by explosion is prevented from being transmitted to the outside of equipment to cause environmental explosion; the explosion-proof surface length and gap design required in the explosion-proof design standard is strictly installed in the two parts, meanwhile, an explosion-proof combination surface is formed, so that the weight and the size of parts in equipment are reduced, the production cost is reduced, and when the explosion-proof pan-tilt can be used for an explosion-proof pan-tilt, the weight of the explosion-proof pan-tilt is reduced, and meanwhile the installation difficulty of the pan-tilt is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of worm gears, and more specifically, to an explosion-proof worm gear transmission structure. Background Art

[0002] The worm gear mechanism is often used to transmit motion and power between two staggered axes. The worm wheel and worm are equivalent to the gear and rack in their middle plane, and the worm is similar in shape to the screw.

[0003] At present, the worm gear seat and worm seat of the explosion-proof pan / tilt head are designed as separate parts, which have complex structure and high installation difficulty. The shell has no explosion-proof design, and the whole machine needs to be designed with explosion-proof joint surfaces, which increases the size and cost of the explosion-proof pan / tilt head. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the utility model provides an explosion-proof worm gear transmission structure.

[0005] The utility model provides an explosion-proof worm gear transmission structure adopts the following technical solutions:

[0006] An explosion-proof worm gear transmission structure comprises a housing, a mounting seat located at the bottom of the housing for mounting, and a driving mechanism located in the housing, wherein a rotating seat is connected to the top of the driving mechanism, and the rotating seat is driven to rotate by the driving mechanism;

[0007] The driving mechanism comprises a housing, a motor fixing bracket is fixedly connected to the surface of the housing by bolts, a motor is connected to the surface of the motor fixing bracket by bolts, and the motor is located above the housing, a synchronous wheel 1 is fixedly connected to the output shaft of the motor, a synchronous wheel 1 is rotatably connected to the surface of the synchronous wheel 1 by a synchronous belt, the synchronous wheel 1 is connected to the synchronous wheel 2 by the synchronous belt, and the output shaft of the worm gear assembly is installed inside the synchronous wheel 2;

[0008] The worm gear assembly includes a worm gear rotatably connected to a motor fixing bracket, a worm wheel meshingly connected to the surface of the worm gear, a transmission rod fixedly connected to the inside of the worm wheel, a worm wheel bearing and a worm wheel bearing 2 rotatably connected to the surfaces of both ends of the transmission rod, a copper sleeve fixedly connected to the surface of the worm wheel bearing 2, and the copper sleeve installed inside the motor fixing bracket.

[0009] Preferably, the synchronous wheel 2 is fixedly connected to the worm by a fixing screw, both ends of the worm are rotatably connected to worm bearings, and the worm bearings are installed in a motor fixing bracket, and a worm bearing adjustment nut is installed at the end of the worm away from the fixing screw, and the worm bearing adjustment nut is used to adjust the gap of the worm bearing.

[0010] Preferably, a worm gear bearing cover is fixedly connected to the surface of the worm gear bearing, and the worm gear bearing cover is sleeved on the surface of the worm gear bearing, one end of the transmission rod passing through the worm gear bearing cover is connected to a conductive slip ring by bolts, the lower part of the conductive slip ring is fixedly mounted on the driving gear by bolts, the surface of the driving gear is meshingly connected to a driven gear, the interior of the driven gear is fixedly connected to a rotating shaft, the top of the rotating shaft is fixedly connected to a magnet mounting bracket, the top of the magnet mounting bracket is fixedly connected to a magnet, and the top of the motor fixing bracket is fixedly connected to a PCBA board by bolts.

[0011] Preferably, the PCBA board includes a support plate, an optical coupling board, and a magnetic encoding chip. The optical coupling board and the magnetic encoding chip are respectively installed on the top of the support plate, and the magnetic encoding chip is located directly above the synchronous wheel one.

[0012] Preferably, the shell is composed of a rectangle and a cylinder, a sealing ring is provided at the junction of the rectangle and the cylinder, an oil seal is installed at the lower portion of the cylinder, and the transmission rod passes through the oil seal and is connected to the rotating seat.

[0013] Preferably, a copper cylinder is fixedly connected to the top of the copper sleeve, and the copper cylinder is located in the inner recess of the worm gear, a cylinder is fixedly connected to the surface of the transmission rod, and the cylinder is located in the copper cylinder, the surfaces of the cylinder and the copper cylinder are both designed as explosion-proof surfaces, the explosion-proof surface of the cylinder and the explosion-proof surface of the copper cylinder cooperate with each other to form a second explosion-proof joint surface, the surface of the copper sleeve is designed as a explosion-proof surface, the inside and outside of the shell are both designed as explosion-proof surfaces, the explosion-proof surface of the copper sleeve and the explosion-proof surface inside the shell cooperate with each other to form a first explosion-proof joint surface, the inside of the shell is designed as a explosion-proof surface, and the explosion-proof surface outside the shell and the explosion-proof surface inside the shell cooperate with each other to form a third explosion-proof joint surface.

[0014] Preferably, the worm wheel is installed in a worm wheel seat, and the worm passes through the worm wheel seat, and the worm is meshed with the worm, and the worm wheel seat includes a worm wheel seat and a worm seat, and the worm wheel seat and the worm seat are of an integrated design.

[0015] In summary, the utility model includes the following beneficial technical effects:

[0016] 1. The utility model forms a flameproof joint surface one by the cooperation between the flameproof surface of the copper sleeve and the flameproof surface inside the shell, and the worm bearing two is installed in the copper sleeve. While meeting the length of the flameproof joint surface one, the size of the entire shell is reduced. The inner part of the shell is designed as a flameproof surface, and the outer flameproof surface of the shell and the flameproof surface inside the shell cooperate to form a flameproof joint surface three, thereby preventing the flame generated by the explosion from being transmitted to the outside of the equipment, thereby causing an environmental explosion. The design of these two parts strictly follows the flameproof surface length and gap design required by the flameproof design standard. At the same time, by forming a flameproof joint surface, the weight and volume of the parts inside the equipment are reduced, and the production cost is reduced. When it can be used for an explosion-proof pan / tilt, the weight reduction design of the explosion-proof pan / tilt greatly reduces the difficulty of installing the pan / tilt.

[0017] 2. The utility model cooperates with a motor, a synchronous wheel 1, a synchronous belt, a synchronous wheel 2, a worm and a worm wheel to make the worm wheel drive the driving gear and the rotating seat to rotate through the transmission rod, the driving gear rotates to drive the driven gear to rotate, the driven gear rotates to drive the rotating shaft and the magnet mounting bracket and the magnet on the magnet mounting bracket to rotate. When the magnet rotates, the Hall effect principle of the magnetic encoding chip is used, and then the position is provided by the optical coupling board, so that during the operation of the equipment, the rotation position is fed back to the control system in real time, realizing the closed loop of the control system, thereby improving the transmission accuracy.

[0018] 3. In the worm gear assembly, the worm gear is installed on the same part (worm gear seat), and the installation dimension chain is minimized, which is beneficial to improving the transmission accuracy. The housing has no adjustment structure, is more compact, and is more convenient to install. The worm bearing adopts a worm bearing adjustment nut clearance adjustment structure to adjust the worm bearing clearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front internal structure in an embodiment of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the driving mechanism in the embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the exploded structure of the driving mechanism in the embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the internal structure of the driving mechanism in the embodiment of the utility model;

[0023] Figure 5 It is the embodiment of the utility model Figure 4 The enlarged structural diagram at A in the middle;

[0024] Figure 6 It is the embodiment of the utility model Figure 5 The enlarged structural diagram at B in the middle;

[0025] Figure 7 It is a schematic diagram of the exploded structure of the worm gear assembly in the embodiment of the utility model;

[0026] Figure 8 It is a schematic diagram of the PCBA board structure in an embodiment of the utility model;

[0027] Fig. 9 It is a schematic diagram of the shell structure in an embodiment of the utility model.

[0028] Description of the accompanying drawings: 1. housing; 2. mounting seat; 3. driving mechanism; 4. rotating seat; 5. housing; 6. motor fixing bracket; 7. motor; 8. synchronous wheel 1; 9. synchronous belt; 10. synchronous wheel 2; 11. worm gear assembly; 12. worm; 13. worm bearing; 14. worm bearing clearance adjustment nut; 15. fixing screw; 16. worm gear seat; 17. worm wheel; 18. worm wheel bearing 1; 181. worm wheel bearing 2; 1 9. Worm gear bearing cover; 20. Copper sleeve; 201. Copper cylinder; 21. Sealing ring; 22. Transmission rod; 221. Cylinder; 23. Oil seal; 24. Driving gear; 241. Conductive slip ring; 25. Driven gear; 26. Rotating shaft; 27. Magnet mounting bracket; 28. Magnet; 29. ​​PCBA board; 30. Optocoupler board; 31. Magnetic encoding chip; 32. Flameproof joint surface one; 33. Flameproof joint surface two; 34. Flameproof joint surface three. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-9 The utility model is described in further detail.

[0030] It should be noted that the drawings are schematic and not to scale. For the sake of clarity and convenience, the relative sizes and proportions of the parts shown in the drawings are exaggerated or reduced in size, and any size is only illustrative and not restrictive. In addition, the same reference symbol is used for the same structure, element or accessory appearing in more than two figures to reflect similar features.

[0031] The utility model embodiment discloses an explosion-proof worm gear transmission structure. Figure 1-9 An explosion-proof worm gear transmission structure comprises a housing 1 and a mounting seat 2 for mounting at the bottom of the housing 1, a driving mechanism 3 located in the housing 1, a rotating seat 4 is connected to the top of the driving mechanism 3, the rotating seat 4 is driven to rotate by the driving mechanism 3, and an explosion-proof pan / tilt head is installed on the rotating seat 4;

[0032] Reference Figure 4-6The driving mechanism 3 includes a housing 5, a copper cylinder 201 is fixedly connected to the top of the copper sleeve 20, and the copper cylinder 201 is located in the concave part of the worm wheel 17, a cylinder 221 is fixedly connected to the surface of the transmission rod 22, and the cylinder 221 is located in the copper cylinder 201, and the surfaces of the cylinder 221 and the copper cylinder 201 are both designed as explosion-proof surfaces, and the explosion-proof surface of the cylinder 221 and the explosion-proof surface of the copper cylinder 201 cooperate with each other to form an explosion-proof joint surface 233, and the worm wheel 17 is designed to be concave, and the length of the explosion-proof joint surface 233 is satisfied. While increasing the length of the shell 5, the size of the entire shell 5 is reduced. The surface of the copper sleeve 20 is designed as a flameproof surface. The inside and outside of the shell 5 are designed as flameproof surfaces. The flameproof surface of the copper sleeve 20 and the flameproof surface inside the shell 5 cooperate with each other to form a flameproof joint surface 32. The worm gear bearing 181 is installed in the copper sleeve 20. While meeting the length of the flameproof joint surface 32, the size of the entire shell 5 is reduced. The inside of the shell 1 is designed as a flameproof surface. The outer flameproof surface of the shell 5 and the inner flameproof surface of the shell 1 cooperate with each other to form a flameproof joint surface 34.

[0033] Through the above-mentioned structural design, the flame generated by the explosion is prevented from being transmitted to the outside of the equipment, thereby causing an environmental explosion. The two-part design strictly implements the explosion-proof surface length and gap design required by the explosion-proof design standard. At the same time, by forming a explosion-proof joint surface, the weight and volume of the parts in the equipment are reduced, and the production cost is reduced. When it can be used for an explosion-proof pan-tilt head, the explosion-proof pan-tilt head has a weight reduction design and greatly reduces the difficulty of installing the pan-tilt head.

[0034] Reference Figure 2 , 3 , 4, 9, the housing 5 is composed of a rectangle and a cylinder, a sealing ring 21 is provided at the junction of the rectangle and the cylinder, an oil seal 23 is installed at the lower part of the cylinder, and the transmission rod 22 passes through the oil seal 23 and is connected to the rotating seat 4, the surface of the housing 5 is fixedly connected to the motor fixing bracket 6 by bolts, the surface of the motor fixing bracket 6 is connected to the motor 7 by bolts, and the motor 7 is located above the housing 5, the output shaft of the motor 7 is fixedly connected to the synchronous wheel 1 8, the surface of the synchronous wheel 1 8 is rotatably connected to the synchronous belt 9, the synchronous wheel 1 8 is connected to the synchronous wheel 2 10 through the synchronous belt 9, and the output shaft of the worm gear assembly 11 is installed inside the synchronous wheel 2 10;

[0035] Reference Figure 3-7 The worm gear assembly 11 includes a worm 12 rotatably connected to the motor fixing bracket 6, a synchronous wheel 10 is fixedly connected to the worm 12 through a fixing screw 15, both ends of the worm 12 are rotatably connected to worm bearings 13, and the worm bearings 13 are installed in the motor fixing bracket 6, and a worm bearing clearance adjustment nut 14 is installed at one end of the worm 12 away from the fixing screw 15, and the gap of the worm bearing 13 is adjusted by using the worm bearing clearance adjustment nut 14, and the surface of the worm 12 is meshedly connected to a worm wheel 17, and the inside of the worm wheel 17 is fixedly connected to a transmission rod 22;

[0036] Reference Figure 3-7 The worm wheel 17 is installed in the worm gear seat 16, and the worm 12 passes through the worm gear seat 16, and the worm wheel 17 is meshed with the worm 12. The worm gear seat 16 includes a worm wheel seat and a worm seat. The worm wheel seat and the worm seat are designed in an integrated manner. The installation positions of the worm wheel 17 and the worm 12 are processed on the same part. The size chain is greatly reduced, which helps to improve the installation accuracy of the worm wheel 17 and the worm 12. The worm gear seat 16 is designed with an oil seal installation position and a seal installation position to ensure that the waterproof performance of the module can reach IP67 or above. The motor mounting bracket 6 position is designed on the worm gear seat 16 to facilitate the integration of the motor 7. The surfaces of both ends of the transmission rod 22 are rotatably connected with the worm wheel bearing 18 and the worm wheel bearing 2 181 respectively. The surface of the worm wheel bearing 2 181 is fixedly connected with a copper sleeve 20, and the copper sleeve 20 is installed inside the motor fixing bracket 6;

[0037] Through the above structural design, in the worm gear assembly 11, the worm wheel 17 and the worm 12 are installed on the same part (worm gear seat 16), and the installation dimension chain is as short as possible, which is conducive to improving the transmission accuracy. The housing has no adjustment structure, which is more compact and more convenient to install. The worm bearing 13 adopts a worm bearing clearance adjustment nut 14 clearance adjustment structure for adjusting the clearance of the worm bearing 13;

[0038] Reference Figure 3-8 , a worm gear bearing cover 19 is fixedly connected to the surface of the worm gear bearing 18, and the worm gear bearing cover 19 is sleeved on the surface of the worm gear bearing 18, one end of the transmission rod 22 passing through the worm gear bearing cover 19 is connected to a conductive slip ring 241 by bolts, the conductive slip ring 241 supports the driving gear to rotate continuously by 360 degrees, the lower part of the conductive slip ring 241 is fixedly installed on the driving gear 24 by bolts, the surface of the driving gear 24 is meshedly connected with a driven gear 25, the interior of the driven gear 25 is fixedly connected with a rotating shaft 26, and the rotating shaft 26 is rotatably connected to the housing 5, the top of the rotating shaft 26 is fixedly connected with a magnet mounting bracket 27, the top of the magnet mounting bracket 27 is fixedly connected with a magnet 28, and the top of the motor fixing bracket 6 is fixedly connected with a PCBA board 29 by bolts;

[0039] The PCBA board 29 includes a support board, an optical coupling board 30, and a magnetic encoding chip 31. The magnetic encoding chip 31 provides a closed-loop control function to improve transmission accuracy. The optical coupling board 30 and the magnetic encoding chip 31 are respectively installed on the top of the support board, and the magnetic encoding chip 31 is located directly above the synchronous wheel 8.

[0040] Specifically, the starting motor 7 drives the synchronous wheel 1 8 to rotate, the synchronous wheel 1 8 rotates through the synchronous belt 9 to drive the synchronous wheel 2 10 to rotate, the synchronous wheel 2 10 rotates to drive the worm 12 to rotate, the worm 12 rotates to drive the worm wheel 17 to rotate, the worm wheel 17 rotates to drive the driving gear 24 and the rotating seat 4 to rotate through the transmission rod 22, the driving gear 24 rotates to drive the driven gear 25 to rotate, the driven gear 25 rotates to drive the rotating shaft 26 and the magnet mounting bracket 27 and the magnet 28 on the magnet mounting bracket 27 to rotate, when the magnet 28 rotates, through the Hall effect principle of the magnetic encoding chip 31, and then the optical coupling board 30 provides the position;

[0041] Through the above structural design, the rotation position can be fed back to the control system in real time during the operation of the equipment, thereby improving the transmission accuracy.

[0042] Finally, a few points should be explained: First, in the description of the present utility model, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0043] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0044] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An explosion-proof worm gear transmission structure, comprising a housing (1), a mounting seat (2) located at the bottom of the housing (1) for mounting, and a driving mechanism (3) located in the housing (1), characterized in that: The top of the driving mechanism (3) is connected to a rotating seat (4), and the driving mechanism (3) is used to drive the rotating seat (4) to rotate; The driving mechanism (3) comprises a housing (5), the surface of the housing (5) is fixedly connected to a motor fixing bracket (6) by means of bolts, the surface of the motor fixing bracket (6) is connected to a motor (7) by means of bolts, and the motor (7) is located above the housing (5), the output shaft of the motor (7) is fixedly connected to a synchronous wheel 1 (8), the surface of the synchronous wheel 1 (8) is rotatably connected to a synchronous belt (9), the synchronous wheel 1 (8) is connected to a synchronous wheel 2 (10) by means of the synchronous belt (9), and the output shaft of a worm gear assembly (11) is installed inside the synchronous wheel 2 (10); The worm gear assembly (11) comprises a worm (12) rotatably connected to a motor fixing bracket (6); a worm wheel (17) is meshedly connected to the surface of the worm (12); a transmission rod (22) is fixedly connected inside the worm wheel (17); two end surfaces of the transmission rod (22) are rotatably connected to a worm wheel bearing (18) and a second worm wheel bearing (181), respectively; a copper sleeve (20) is fixedly connected to the surface of the second worm wheel bearing (181), and the copper sleeve (20) is installed in the motor fixing bracket (6).

2. The explosion-proof worm gear transmission structure according to claim 1, characterized in that: The synchronous wheel 2 (10) is fixedly connected to the worm (12) by means of a fixing screw (15); both ends of the worm (12) are rotatably connected to worm bearings (13), and the worm bearings (13) are installed in a motor fixing bracket (6); a worm bearing clearance adjustment nut (14) is installed at one end of the worm (12) away from the fixing screw (15); and the clearance of the worm bearing (13) is adjusted by means of the worm bearing clearance adjustment nut (14).

3. The explosion-proof worm gear transmission structure according to claim 1, characterized in that: The surface of the worm gear bearing (18) is fixedly connected with a worm gear bearing cover (19), and the worm gear bearing cover (19) is sleeved on the surface of the worm gear bearing (18); one end of the transmission rod (22) passing through the worm gear bearing cover (19) is connected with a conductive slip ring (241) by bolts; the lower part of the conductive slip ring (241) is fixedly installed on the driving gear (24) by bolts; the surface of the driving gear (24) is meshingly connected with a driven gear (25); the interior of the driven gear (25) is fixedly connected with a rotating shaft (26); the top of the rotating shaft (26) is fixedly connected with a magnet mounting bracket (27); the top of the magnet mounting bracket (27) is fixedly connected with a magnet (28); the top of the motor fixing bracket (6) is fixedly connected with a PCBA board (29) by bolts.

4. The explosion-proof worm gear transmission structure according to claim 3, characterized in that: The PCBA board (29) comprises a support board, an optical coupling board (30), and a magnetic encoding chip (31); the optical coupling board (30) and the magnetic encoding chip (31) are respectively installed on the top of the support board, and the magnetic encoding chip (31) is located directly above the synchronous wheel (8).

5. The explosion-proof worm gear transmission structure according to claim 1, characterized in that: The housing (5) is composed of a rectangle and a cylinder. A sealing ring (21) is provided at the junction of the rectangle and the cylinder. An oil seal (23) is installed at the bottom of the cylinder, and a transmission rod (22) passes through the oil seal (23) and is connected to the rotating seat (4).

6. The explosion-proof worm gear transmission structure according to claim 5, characterized in that: The top of the copper sleeve (20) is fixedly connected to a copper cylinder (201), and the copper cylinder (201) is located in a concave portion of the worm wheel (17). The surface of the transmission rod (22) is fixedly connected to a cylinder (221), and the cylinder (221) is located in the copper cylinder (201). The surfaces of the cylinder (221) and the copper cylinder (201) are both designed as explosion-proof surfaces. The explosion-proof surface of the cylinder (221) and the explosion-proof surface of the copper cylinder (201) cooperate with each other to form a second explosion-proof joint surface (33). The surface of the copper sleeve (20) is designed as a explosion-proof surface. The inside and outside of the shell (5) are both designed as explosion-proof surfaces. The explosion-proof surface of the copper sleeve (20) and the inner explosion-proof surface of the shell (5) cooperate with each other to form a first explosion-proof joint surface (32). The inside of the shell (1) is designed as a explosion-proof surface. The outer explosion-proof surface of the shell (5) and the inner explosion-proof surface of the shell (1) cooperate with each other to form a third explosion-proof joint surface (34).

7. The explosion-proof worm gear transmission structure according to claim 1, characterized in that: The worm wheel (17) is installed in the worm wheel seat (16), and the worm (12) passes through the worm wheel seat (16), and the worm wheel (17) is meshed with the worm (12), and the worm wheel seat (16) comprises a worm wheel seat and a worm seat, and the worm wheel seat and the worm seat are of an integrated design.

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