Plastic gearbox with protective structure

Abstract

The utility model relates to the technical field of plastic gear boxes, in particular to a plastic gear box with a protective structure, which comprises a gear box shell, and the lower side of the gear box shell is fixedly connected with two symmetrically distributed supporting legs. Through the arrangement of the limiting piece, rotation limiting can be conducted on the rotating disc, then the gear shaft is guided, the problem that centrifugal shaking is generated when the gear shaft rotates at a high speed is avoided, the gear shaft is protected, and under the deformation effect of the spring, the limiting piece can make contact with the rotating disc all the time, so that the limiting effect of the limiting piece is guaranteed; through the arrangement of the sealing disc, the oil injection port can be blocked, the problem that dust and other impurities are generated by the idle oil injection port is avoided, components and the like in the gearbox are protected, the rotating disc can be pushed to drive the end rod to rotate so as to drive the sealing disc to deflect, the oil injection port is manually opened, and subsequent lubricating grease injection and use are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic gear boxes, in particular to a plastic gear box with a protective structure. Background Art

[0002] Plastic gearbox is a gear transmission device made of plastic material, used to transmit power and control mechanical movement. Plastic gearboxes are usually composed of plastic gears, bearings, shafts and housings. They can be used in a variety of applications, including home appliances, automobiles, toys, medical equipment and other fields.

[0003] A utility model patent with patent authorization announcement number CN216519491U discloses a plastic gear box that is easy to disassemble and repair, including a main shell, a side panel and a top cover. The main shell includes a shell and a bottom plate. The shell is installed on the upper end surface of the bottom plate, and the shell and the bottom plate are formed as one piece. The side panels are installed on the sides of the shell, and the side panels are sealed and fixedly connected to the shell. The top cover is installed on the head of the side panels, and the top cover is vertically fixedly connected to the side panels to ensure that the shell can be stably installed through the bottom plate when the user needs to use it. At the same time, by symmetrically arranging limit plates on the shell, it is ensured that the side panels are installed in conjunction with the use, so that the locking plates can be stably inserted into the guide groove, so that the shell and the side panels can be better sealed and connected to each other. After the side panels are installed, the user can stably install the top cover on the top of the side panels.

[0004] However, the existing plastic gearboxes also have certain shortcomings. Although the existing plastic gearboxes use bearings and other components to assemble the gear shaft, due to the influence of factors such as the gear shaft length and rotation speed, it will not only cause slight shaking of the gear shaft, but also cause hard extrusion damage to the bearing. In addition, the existing plastic gearboxes mostly use straight-through oil filling ports to add lubricating grease, etc., and due to the influence of impurities such as dust in the air, it is easy to cause problems such as dust intrusion into idle oil filling ports. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a plastic gear box with a protective structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A plastic gearbox with a protective structure comprises a gearbox housing, wherein two symmetrically distributed supporting feet are fixedly connected to the lower side of the gearbox housing, and a bolt is movably connected to the horizontal portion of each supporting foot. A shell cover is installed on the front side of the gearbox housing by screws, a gear shaft is arranged inside the shell cover, an oil filling port is arranged on the upper side of the gearbox housing, and a protective mechanism is commonly arranged on the shell cover, the gear shaft and the oil filling port.

[0008] In addition, a preferred structure is that the protective mechanism includes a rotating disk, the outer side of the gear shaft is fixedly sleeved with a rotating disk, the front side of the shell cover is fixedly connected to a guide frame, the horizontal part of the guide frame is slidably sleeved with a movable plate, the movable plate is slidably connected to the shell cover, the vertical part of the guide frame is welded with a spring, the other end of the spring is welded to the movable plate, the interior of the movable plate is fixedly connected with a support plate, the end face of the support plate close to the rotating disk is fixedly connected with a limiting plate, the limiting plate is in contact with the rotating disk, and through the deformation action of the spring, the movable plate can be pushed to drive the support plate to move, and then push the limiting plate to be in a tightened state, thereby limiting the rotation of the rotating disk, and then protecting the gear shaft to avoid the centrifugal jitter problem of the gear shaft.

[0009] In addition, a preferred structure is that the interior of the oil filling port is fixedly connected with a mounting cylinder, the interior of the mounting cylinder is rotatably connected with an end rod, the end rod is rotatably connected to the oil filling port, the back of the end rod is fixedly connected with a turntable, the outer side of the end rod is fixedly sleeved with a sealing disk, the sealing disk is rotatably connected to the oil filling port, and a torsion spring is provided on the outer side of the end rod. Through the provision of the sealing disk, the idle oil filling port can be sealed to avoid the problem of intrusion of impurities such as dust, and the end rod can be pushed to rotate to drive the sealing disk to rotate, and then the oil filling port can be manually opened to facilitate the subsequent filling and use of lubricating grease.

[0010] In addition, a preferred structure is that two guide frames are provided, and the two guide frames are evenly distributed on the shell cover. Through the provision of the guide frames, the movable plate can be guided.

[0011] In addition, a preferred structure is that four support rods are fixedly connected to the surface of the turntable, and the four support rods are arranged in a circular array on the turntable. The arrangement of the support rods facilitates the turning table to be rotated.

[0012] In addition, a preferred structure is that one end of the torsion spring is welded to the mounting tube, and the other end of the torsion spring is welded to the end rod. By setting the torsion spring, the end rod can be connected for use.

[0013] The beneficial effects of the utility model are as follows: through the setting of the limit plate, the rotation of the rotating disk can be limited, and then the gear shaft can be guided to avoid the problem of centrifugal jitter when the gear shaft rotates at high speed, and the gear shaft can be protected. Under the deformation action of the spring, the limit plate can always be in contact with the rotating disk to ensure the limiting effect of the limit plate. Through the setting of the sealing disk, the oil filling port can be blocked to avoid the problem of dust and other impurities invading the idle oil filling port, and the components inside the gear box can be protected. The turntable can be pushed to drive the end rod to rotate, so as to drive the sealing disk to deflect, and the oil filling port can be manually opened to facilitate the subsequent filling of lubricating grease. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of the overall structure of a plastic gearbox with a protective structure proposed by the utility model;

[0015] Figure 2 A plastic gearbox with a protective structure proposed by the utility model Figure 1 A cutaway perspective view of the oil filling port;

[0016] Figure 3 A plastic gearbox with a protective structure proposed by the utility model Figure 1 Three-dimensional protective mechanism Figure 1 ;

[0017] Figure 4 A plastic gearbox with a protective structure proposed by the utility model Figure 2 Three-dimensional protective mechanism Figure 2 .

[0018] In the figure: 1. gear box housing; 2. support foot; 3. bolt; 4. housing cover; 5. gear shaft; 6. oil filling port; 7. protection mechanism; 71. rotating disk; 72. guide frame; 73. moving plate; 74. spring; 75. support plate; 76. limit plate; 77. mounting tube; 78. end rod; 79. turntable; 790. sealing disk; 791. torsion spring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 A plastic gearbox with a protective structure includes a gearbox housing 1, two symmetrically distributed supporting feet 2 are fixedly connected to the lower side of the gearbox housing 1, and a bolt 3 is movably connected to the horizontal part of each supporting foot 2. A shell cover 4 is installed on the front of the gearbox housing 1 by screws, and a gear shaft 5 is arranged inside the shell cover 4. An oil filling port 6 is arranged on the upper side of the gearbox housing 1.

[0021] Reference Figure 1 , Figure 2 , Figure 3The shell cover 4, the gear shaft 5 and the oil filling port 6 are jointly provided with a protective mechanism 7, which includes a rotating disk 71, the outer side of the gear shaft 5 is fixedly sleeved with the rotating disk 71, the front of the shell cover 4 is fixedly connected with a guide frame 72, two guide frames 72 are provided, and the two guide frames 72 are evenly distributed on the shell cover 4. Through the setting of the guide frame 72, the movable plate 73 can be guided, and the horizontal part of the guide frame 72 is slidably sleeved with the movable plate 73, and the movable plate 73 is slidably connected with the shell cover 4, and the vertical part of the guide frame 72 is welded with a spring The other end of the spring 74 is welded to the movable plate 73. The interior of the movable plate 73 is fixedly connected with a support plate 75. The end surface of the support plate 75 close to the rotating disk 71 is fixedly connected with a limiting plate 76. The limiting plate 76 is in contact with the rotating disk 71. Through the deformation of the spring 74, the movable plate 73 can be pushed to drive the support plate 75 to move, thereby pushing the limiting plate 76 to be in a tightened state, limiting the rotation of the rotating disk 71, and then protecting the gear shaft 5 to avoid the centrifugal jitter problem of the gear shaft 5.

[0022] Reference Figure 1 , Figure 2 , Figure 4 The inside of the oil filling port 6 is fixedly connected with a mounting cylinder 77, and the inside of the mounting cylinder 77 is rotatably connected with an end rod 78. The end rod 78 is rotatably connected to the oil filling port 6. The back of the end rod 78 is fixedly connected with a turntable 79. The outer side of the end rod 78 is fixedly sleeved with a sealing disk 790, and the sealing disk 790 is rotatably connected to the oil filling port 6. A torsion spring 791 is provided on the outer side of the end rod 78. Through the provision of the sealing disk 790, the idle oil filling port 6 can be blocked to avoid the problem of dust and other impurities invading. The end rod 78 can be pushed to rotate to drive the sealing disk 790 to rotate, and then the oil filling port 6 can be manually opened to facilitate the subsequent filling of lubricating grease.

[0023] Reference Figure 1 , Figure 2 , Figure 4 Four support rods are fixedly connected to the surface of the turntable 79. The four support rods are arranged in a circular array on the turntable 79. The arrangement of the support rods facilitates the turntable 79 to be rotated. One end of the torsion spring 791 is welded to the mounting tube 77, and the other end of the torsion spring 791 is welded to the end rod 78. The end rod 78 can be connected for use through the arrangement of the torsion spring 791.

[0024] The specific implementation process of the utility model is as follows: when in use, the idle oil filling port 6 can be protected by the setting of the sealing disk 790 to avoid the problem of dust and other impurities invading, and the rotating disk 79 can be pushed to rotate to drive the end rod 78 to rotate, the torsion spring 791 is deformed, and the sealing disk 790 is driven to rotate, and then the oil filling port 6 is manually opened, which is convenient for the operator to add lubricating grease and the like;

[0025] When the gear shaft 5 rotates, it can drive the rotating disk 71 to rotate, so that the rotating disk 71 rotates along the surface of the limiting plate 76. Under the action of the limiting plate 76, the rotating disk 71 is limited, and then the gear shaft 5 is limited in rotation, to avoid the centrifugal jitter problem of the gear shaft 5 and protect the gear shaft 5. Under the deformation action of the spring 74, the movable plate 73 can be pushed to drive the support plate 75 to move, and then the limiting plate 76 is pushed to always contact with the gear shaft 5 to ensure a good limiting effect of the limiting plate 76.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plastic gearbox with a protective structure, comprising a gearbox housing (1), characterized in that: The lower side of the gearbox housing (1) is fixedly connected to two symmetrically distributed supporting feet (2), and the horizontal part of each supporting foot (2) is movably connected to a bolt (3). The front side of the gearbox housing (1) is mounted with a housing cover (4) by means of screws, and a gear shaft (5) is arranged inside the housing cover (4). An oil filling port (6) is arranged on the upper side of the gearbox housing (1), and a protective mechanism (7) is commonly arranged on the housing cover (4), the gear shaft (5) and the oil filling port (6).

2. The plastic gearbox with a protective structure according to claim 1, characterized in that: The protection mechanism (7) comprises a rotating disk (71), the rotating disk (71) is fixedly sleeved on the outer side of the gear shaft (5), the front side of the shell cover (4) is fixedly connected with a guide frame (72), the horizontal part of the guide frame (72) is slidably sleeved with a movable plate (73), the movable plate (73) is slidably connected to the shell cover (4), the vertical part of the guide frame (72) is welded with a spring (74), the other end of the spring (74) is welded to the movable plate (73), the inside of the movable plate (73) is fixedly connected with a support plate (75), the end surface of the support plate (75) close to the rotating disk (71) is fixedly connected with a limit plate (76), and the limit plate (76) is in contact with the rotating disk (71).

3. The plastic gearbox with a protective structure according to claim 1, characterized in that: The inside of the oil filling port (6) is fixedly connected to a mounting tube (77), the inside of the mounting tube (77) is rotatably connected to an end rod (78), the end rod (78) is rotatably connected to the oil filling port (6), the back of the end rod (78) is fixedly connected to a turntable (79), the outside of the end rod (78) is fixedly sleeved with a sealing disk (790), the sealing disk (790) is rotatably connected to the oil filling port (6), and a torsion spring (791) is provided on the outside of the end rod (78).

4. The plastic gearbox with a protective structure according to claim 2, characterized in that: Two guide frames (72) are provided, and the two guide frames (72) are evenly distributed on the shell cover (4).

5. The plastic gearbox with a protective structure according to claim 3, characterized in that: Four support rods are fixedly connected to the surface of the rotating disk (79), and the four support rods are arranged in a circular array on the rotating disk (79).

6. The plastic gearbox with a protective structure according to claim 3, characterized in that: One end of the torsion spring (791) is welded to the mounting tube (77), and the other end of the torsion spring (791) is welded to the end rod (78).

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