Speed reducer structure applied to internal transmission system of monitoring camera

Abstract

The utility model discloses a speed reducer structure applied to an internal transmission system of a monitoring camera, which comprises a shell and a rotor, and a fixed block is arranged in the shell. According to the utility model, the rotor is driven to rotate, so that the pin gear connected with the rotor swings, the pin gear drives the cycloidal gear to roll in the swinging process, the cycloidal gear drives the output shaft to rotate in the rolling process, and the gear assembled on the output shaft is connected with the gear below the camera through the synchronous belt. The output shaft rotates to drive the camera to rotate, and compared with a traditional speed reducer structure, a double-bearing and double-fulcrum structure is adopted, so that the transmission process is more stable; the phenomenon that the camera falls down easily due to the fact that a gap of a multi-stage transmission gear of a parallel shaft speed reducer is large and a single-fulcrum bearing operates unstably during downward rotation is avoided, the gap is reduced, meanwhile, the torque during rotation is increased, and it is guaranteed that the camera does not fall down when rotating downwards again.

Description

Technical Field

[0001] This utility model relates to the field of steering technology for monitoring equipment, specifically a reducer structure applied to the internal transmission system of a monitoring camera. Background Technology

[0002] With the continuous development of surveillance technology, surveillance cameras are increasingly widely used in many fields such as security, intelligent transportation, and industrial monitoring. In the pan-tilt-zoom (PTZ) structure of a surveillance camera, the reducer plays a crucial role in achieving precise and stable camera rotation to cover a wider monitoring range and accurately capture targets.

[0003] Traditional reducers used in surveillance cameras often have some shortcomings. Traditional reducers are parallel shaft reducers with large gear clearances and multiple sets of meshing gears, which can cause deviations when the camera rotates and positions itself, affecting the accuracy and integrity of the monitoring image. When rotating downwards, the large clearances can easily cause the camera to fall. Worm gear drives have low transmission efficiency, resulting in energy waste and potentially generating excessive heat during long-term operation, affecting the lifespan and performance stability of the reducer and even the entire camera. Therefore, a reducer structure for use in the internal transmission system of surveillance cameras is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a speed reducer structure for use in the internal transmission system of a surveillance camera, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reducer structure for an internal transmission system of a surveillance camera, comprising a housing and a rotor. A fixing block is installed inside the housing, and a positioning groove is formed on the end face of the fixing block near the opening of the housing. A pin gear connected to the rotor is installed in the positioning groove. A cycloidal wheel is installed inside the pin gear. The cycloidal wheel is sleeved on the outer surface of the output shaft and is configured to drive the cycloidal wheel to rotate the position of the output shaft slightly when the pin gear swings.

[0006] As a further embodiment of this utility model: positioning pins are installed at the three corners of the positioning groove, and the pin gear has three positioning holes for the ends of the positioning pins to be inserted simultaneously.

[0007] As a further embodiment of this utility model: the inner diameter of the positioning groove is greater than the outer diameter of the pin gear, and the inner diameter of the positioning hole is greater than twice the eccentricity of the outer diameter of the end of the positioning post.

[0008] As a further embodiment of this utility model: a first bearing is installed on the inner wall of the housing, the first bearing is connected to the output shaft, and a retaining ring is provided between the first bearing and the output shaft.

[0009] As a further embodiment of this utility model: an output baffle is installed on the end face of the opening of the housing, the end face of the output baffle near the pin gear is in contact with it, and a second bearing is installed on the end face of the output baffle away from the pin gear.

[0010] As a further embodiment of this utility model: threaded holes in the same position are provided on both the fixing block and the output baffle, and the threaded holes on each set of the fixing block and the output baffle are connected by bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This application drives a rotor to rotate, causing a pin gear connected to it to oscillate. During this oscillation, the pin gear drives a cycloidal wheel to roll, which in turn drives the output shaft to rotate. A gear mounted on the output shaft is connected to a gear below the camera via a synchronous belt. The rotation of the output shaft causes the camera to rotate. Compared to traditional reducer structures, this structure uses a double-bearing, double-pivot structure, making the transmission process more stable. It avoids the large gaps in multi-stage transmission gears of parallel shaft reducers and the unstable operation of single-pivot bearings, which could cause the camera to fall downwards during downward rotation due to the large gaps. By reducing the gaps, it also increases the torque during rotation, ensuring that the camera does not fall when rotating downwards. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the reducer of this utility model;

[0014] Figure 2 This is a schematic diagram of the fixing block and pin gear assembly of this utility model;

[0015] Figure 3 This is a schematic diagram of the output shaft and cycloidal wheel assembly of this utility model;

[0016] Figure 4 This is a schematic diagram of the output baffle of this utility model;

[0017] Figure 5 This is a schematic diagram of the fixing block of this utility model;

[0018] Figure 6 This is a schematic diagram of the needle gear of this utility model;

[0019] Figure 7 This is a schematic diagram of the cycloidal wheel of this utility model;

[0020] Figure 8 This is a schematic diagram of the output shaft of this utility model;

[0021] Figure 9This is a schematic diagram of the retaining ring of this utility model;

[0022] In the diagram: 1. Housing; 2. First bearing; 3. Output shaft; 4. Retaining ring; 5. Rotor; 6. Output baffle; 7. Fixing block; 8. Pin gear; 9. Cycloidal wheel; 10. Second bearing. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-9 In this embodiment of the present invention, a reducer structure applied to the internal transmission system of a surveillance camera includes a housing 1 and a rotor 5. A fixing block 7 is installed inside the housing 1. A positioning groove is formed on the end face of the fixing block 7 near the opening of the housing 1. A pin gear 8 connected to the rotor 5 is installed in the positioning groove. The outer diameter of the rotor 5 near the pin gear 8 is 0.2 times the eccentricity of the outer diameter of the other end of the rotor 5. The rotor 5 and the pin gear 8 are in clearance fit. When the rotor 5 rotates, the pin gear 8 swings due to eccentric motion. Positioning pins are installed at the three corners of the positioning groove. Three positioning holes are formed on the pin gear 8 for the ends of the positioning pins to be inserted simultaneously. The inner diameter of the positioning groove is larger than the outer diameter of the pin gear 8, and the inner diameter of the positioning hole is twice the eccentricity of the outer diameter of the positioning post end. A cycloidal wheel 9 is installed inside the pin gear 8. During its rolling process, the outer teeth of the cycloidal wheel 9 mesh with the inner teeth of the pin gear 8. The cycloidal wheel 9 is sleeved on the outer surface of the output shaft 3 and is configured to drive the cycloidal wheel 9 to rotate the position of the output shaft 3 slightly when the pin gear 8 swings. The end of the output shaft is also equipped with a gear that is connected to the gear below the camera via a synchronous belt. When the output shaft rotates, it drives the camera to rotate, thereby realizing the rotation of the camera. The principle here is the traditional transmission principle, which will not be elaborated on further.

[0025] Please see Figure 1 In one embodiment, preferably, a first bearing 2 is installed on the inner wall of the housing 1, and a retaining ring 4 is provided between the first bearing 2 and the rotor 5. Furthermore, the retaining ring 4 serves to axially block the rotor 5 to prevent it from rubbing against the housing 1.

[0026] Please see Figure 1In one embodiment, preferably, an output baffle 6 is installed on the end face of the opening of the housing 1, the end face of the output baffle 6 is close to the end face of the pin gear 8 and contacts it, and a second bearing 10 is installed on the end face of the output baffle 6 away from the pin gear 8, and the second bearing 10 is transitionally fitted with the output shaft 3.

[0027] Please see Figure 4-5 In one embodiment, preferably, both the fixing block 7 and the output baffle 6 have threaded holes in the same position, and the threaded holes on each set of fixing blocks 7 and output baffle 6 are connected by bolts, which further and better connects the output baffle 6 and the fixing block 7 together.

[0028] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0029] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A reducer structure for use in the internal transmission system of a surveillance camera, comprising a housing (1) and a rotor (5), characterized in that, A fixing block (7) is installed inside the housing (1). A positioning groove is formed on the end face of the fixing block (7) near the opening of the housing (1). A pin gear (8) connected to the rotor (5) is installed in the positioning groove. A cycloidal wheel (9) is installed inside the pin gear (8). The cycloidal wheel (9) is sleeved on the outer surface of the output shaft (3) and is configured to drive the cycloidal wheel (9) to rotate the position of the output shaft (3) slightly when the pin gear (8) swings.

2. The reducer structure applied to the internal transmission system of a surveillance camera according to claim 1, characterized in that, Positioning pins are installed at the three corners of the positioning groove, and the pin gear (8) has three positioning holes for the ends of the positioning pins to be inserted simultaneously.

3. The reducer structure applied to the internal transmission system of a surveillance camera according to claim 2, characterized in that, The inner diameter of the positioning groove is greater than the outer diameter of the pin gear (8), and the inner diameter of the positioning hole is greater than twice the eccentricity of the outer diameter of the end of the positioning post.

4. The reducer structure applied to the internal transmission system of a surveillance camera according to claim 1, characterized in that, The inner wall of the housing (1) is equipped with a first bearing (2), which is connected to the output shaft (3). A retaining ring (4) is provided between the first bearing (2) and the output shaft (3).

5. The reducer structure applied to the internal transmission system of a surveillance camera according to claim 1, characterized in that, An output baffle (6) is installed on the end face of the opening of the housing (1). The end face of the output baffle (6) near the pin gear (8) is in contact with it. A second bearing (10) is installed on the end face of the output baffle (6) away from the pin gear (8).

6. The reducer structure applied to the internal transmission system of a surveillance camera according to claim 5, characterized in that, Both the fixing block (7) and the output baffle (6) have threaded holes in the same position, and the threaded holes on each set of the fixing block (7) and the output baffle (6) are connected by bolts.

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