Gearbox structure convenient to exhaust

Abstract

According to the gearbox structure convenient to exhaust, when a locking structure limits movement of a telescopic disc to enable the telescopic disc to be in an initial state, a rubber sealing plug is arranged to abut against the inner side of an exhaust hole to achieve first sealing, and a first rubber sealing ring and a second rubber sealing ring are arranged to achieve second sealing; and meanwhile, when the locking structure unlocks stretching and retracting of the telescopic disc, force is downwards applied to the pressing block, so that the telescopic disc is located in the middle of the annular groove, the rubber sealing plug penetrates through the exhaust hole, at the moment, air in the gearbox body can be rapidly exhausted, and the effect of facilitating exhaust is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission systems, and particularly relates to a gearbox structure facilitating exhaust. Background Art

[0002] A gearbox is a gear transmission device that can fix or change the transmission ratio between the output shaft and the input shaft in gears, and has now been widely applied to various fields such as production, processing, manufacturing, and machinery. The gearbox includes an input part with an input shaft, an output part with an output shaft, and a speed control mechanism that can fix or change the transmission ratio between the output shaft and the input shaft in gears.

[0003] After the temperature of the gearbox rises, the gas inside the gearbox expands, resulting in too high pressure inside the box, which causes oil leakage at parts such as oil seals and sealing rings due to excessive pressure. At this time, it is necessary to perform an exhaust operation on the gearbox.

[0004] Generally, an exhaust hole is provided on the gearbox, and a cover screw for sealing is installed on the exhaust hole. After unscrewing the cover screw, the exhaust of the gearbox can be realized. However, when sealing through the cover screw, there is a problem that the exhaust operation is relatively troublesome. Content of the Utility Model

[0005] The purpose of the utility model is to provide a gearbox structure facilitating exhaust, which has the function of facilitating exhaust.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: A gearbox structure facilitating exhaust includes a gearbox body and an exhaust hole provided at the top of the gearbox body. A telescopic sleeve with a central hole is provided on the gearbox body around the exhaust hole. A first rubber sealing ring is provided between the lower surface of the telescopic sleeve and the gearbox body. A plurality of fixing screws are provided between the bottom of the telescopic sleeve and the gearbox body. A telescopic disc with a pressing block passing through the central hole at the top is telescopically arranged inside the telescopic sleeve. A second rubber sealing ring tightly pressed against the inner wall of the telescopic sleeve is embedded on the circumferential side of the telescopic disc. A guide shaft is provided on the lower surface of the telescopic disc. A rubber sealing plug embedded and tightly pressed against the inside of the exhaust hole is provided at the lower end of the guide shaft. A compression spring that abuts against both ends between the telescopic disc and the gearbox body and drives the telescopic disc to move upward is sleeved on the guide shaft. An annular groove with a thickness greater than that of the telescopic disc is provided inside the telescopic sleeve. When overcoming the elastic force of the compression spring to make the telescopic disc move downward to the limit state, the telescopic disc is located in the middle of the annular groove, and the rubber sealing plug passes through the exhaust hole. A locking structure for restricting or unlocking the telescopic movement of the telescopic disc is provided between the telescopic sleeve and the pressing block.

[0007] By adopting the above technical solution, when the locking structure restricts the movement of the telescopic disc so that the telescopic disc is in the initial state, the rubber sealing plug is arranged to be pressed against the inner side of the exhaust hole to achieve the first seal, and the first rubber sealing ring and the second rubber sealing ring are arranged to achieve the second seal; at the same time, when the locking structure unlocks the telescopic movement of the telescopic disc, by applying a downward force on the pressing block, the telescopic disc is located in the middle of the annular groove, and the rubber sealing plug passes through the exhaust hole. At this time, the air in the gearbox body can be quickly discharged, which has the function of facilitating exhaust.

[0008] A further setting of the present utility model is that: a waist-shaped groove extending along the telescopic direction of the telescopic disc is arranged on the circumferential side of the pressing block, a connecting seat is arranged on the upper surface of the telescopic sleeve, and a limiting shaft with one end embedded in the waist-shaped groove is arranged on the connecting seat. When the limiting shaft is at the uppermost end of the waist-shaped groove, the telescopic disc moves downward to the limit state.

[0009] By adopting the above technical solution, due to the compression deformation of the compression spring, the stroke of the telescopic disc moving downward to the limit state is uncontrollable. At this time, by arranging the waist-shaped groove and the limiting shaft, the limit state of the telescopic disc moving downward is restricted, which is convenient for the telescopic disc to be located in the middle of the annular groove and the rubber sealing plug to pass through the exhaust hole.

[0010] A further setting of the present utility model is that: a limiting groove communicated with the lower end of the waist-shaped groove is arranged on the circumferential side of the pressing block, the limiting shaft is threadedly connected to the connecting seat and passes through the connecting seat, and a knob is arranged at one end of the limiting shaft away from the waist-shaped groove. The locking structure is composed of the limiting groove, the limiting shaft, the connecting seat and the knob.

[0011] By adopting the above technical solution, by rotating the knob to rotate the limiting shaft, the end of the limiting shaft is embedded in the limiting groove, so that the end of the limiting shaft is embedded in the limiting groove, thereby restricting the telescopic movement of the pressing block and the telescopic disc, and avoiding the situation that the telescopic disc moves due to accidental contact with the pressing block.

[0012] A further setting of the present utility model is that: a first guiding angle is arranged at the upper edge of the rubber sealing plug, and a second guiding angle is arranged at the lower edge of the rubber sealing plug.

[0013] By adopting the above technical solution, when the rubber sealing plug is embedded in the exhaust hole, the second guiding angle of the rubber sealing plug is convenient for the rubber sealing plug to be embedded in the exhaust hole; when the rubber sealing plug is reset after passing through the exhaust hole, the first guiding angle of the rubber sealing plug is convenient for the rubber sealing plug to be re-embedded at the exhaust hole.

[0014] A further setting of the present utility model is that: a rubber protective sleeve is wrapped around the upper end of the pressing block.

[0015] By adopting the above technical solution, the upper end of the pressing block is protected by setting a rubber protective sleeve, so that buffering can be carried out during pressing. Brief Description of the Drawings

[0016] Figure 1 is a schematic structural view (partial cross-section) of the present utility model;

[0017] Figure 2 is Figure 1 a partial enlarged view at position A in

[0018] Reference numerals: 1, transmission body; 11, exhaust hole; 2, telescopic sleeve; 21, first rubber sealing ring; 22, fixing screw; 23, annular groove; 3, telescopic disc; 31, pressing block; 311, waist-shaped groove; 312, limiting groove; 32, second rubber sealing ring; 33, guide shaft; 34, rubber sealing plug; 341, first guiding angle; 342, second guiding angle; 35, rubber protective sleeve; 4, compression spring; 51, connecting seat; 52, limiting shaft; 53, knob. Detailed Description of the Embodiment

[0019] The present utility model will be further described in detail below with reference to the drawings.

[0020] Embodiment: A transmission structure facilitating exhaust, as Figure 1 shown, includes a transmission body 1 and an exhaust hole 11 provided at the top of the transmission body 1.

[0021] As Figure 1 and Figure 2 shown, a telescopic sleeve 2 with a central hole is provided on the transmission body 1 around the exhaust hole 11. A first rubber sealing ring 21 is provided between the lower surface of the telescopic sleeve 2 and the transmission body 1, and a plurality of fixing screws 22 are provided between the bottom of the telescopic sleeve 2 and the transmission body 1.

[0022] As Figure 1 and Figure 2 shown, a telescopic disc 3 is telescopically arranged in the telescopic sleeve 2, and a pressing block 31 with the top passing through the central hole is provided. A second rubber sealing ring 32 that abuts against the inner wall of the telescopic sleeve 2 is embedded on the circumferential side of the telescopic disc 3. A guide shaft 33 is provided on the lower surface of the telescopic disc 3. A rubber sealing plug 34 that is embedded and abuts against the inner side of the exhaust hole 11 is provided at the lower end of the guide shaft 33. A compression spring 4 that abuts against both ends between the telescopic disc 3 and the transmission body 1 and drives the telescopic disc 3 to move upward is sleeved on the guide shaft 33. An annular groove 23 with a thickness greater than the thickness of the telescopic disc 3 is provided in the telescopic sleeve 2. When overcoming the elastic force of the compression spring 4 to make the telescopic disc 3 move downward to the limit state, the telescopic disc 3 is located in the middle of the annular groove 23, and the rubber sealing plug 34 passes through the exhaust hole 11.

[0023] As Figure 1 and Figure 2 shown, a waist-shaped groove 311 extending along the telescopic direction of the telescopic disc 3 is provided on the peripheral side of the pressing block 31. A connecting seat 51 is provided on the upper surface of the telescopic sleeve 2. A limiting shaft 52 with one end embedded in the waist-shaped groove 311 is provided on the connecting seat 51. When the limiting shaft 52 is at the uppermost end of the waist-shaped groove 311, the telescopic disc 3 moves downward to the limit state. A limiting groove 312 communicating with the lower end of the waist-shaped groove 311 is provided on the peripheral side of the pressing block 31. The limiting shaft 52 is threadedly connected to the connecting seat 51 and passes through the connecting seat 51. A knob 53 is provided at one end of the limiting shaft 52 away from the waist-shaped groove 311. A locking structure for restricting or unlocking the telescopic movement of the telescopic disc 3 is provided between the telescopic sleeve 2 and the pressing block 31. The locking structure is composed of the limiting groove 312, the limiting shaft 52, the connecting seat 51, and the knob 53 in combination.

[0024] As Figure 2 shown, at the same time, a first guiding angle 341 is provided at the upper edge of the rubber sealing plug 34, and a second guiding angle 342 is provided at the lower edge of the rubber sealing plug 34. The upper end of the pressing block 31 is wrapped with a rubber protective sleeve 35.

[0025] Implementation effect: When the locking structure restricts the movement of the telescopic disc 3 so that the telescopic disc 3 is in the initial state, the rubber sealing plug 34 is provided to achieve the first seal by pressing tightly against the inner side of the exhaust hole 11. The first rubber sealing ring 21 and the second rubber sealing ring 32 are provided to achieve the second seal. At the same time, when the locking structure unlocks the telescopic movement of the telescopic disc 3, by applying a downward force to the pressing block 31, the telescopic disc 3 is located in the middle of the annular groove 23, and the rubber sealing plug 34 passes through the exhaust hole 11. At this time, the air in the transmission body 1 can be quickly discharged, which has the function of facilitating exhaust.

[0026] Due to the compression deformation of the compression spring 4, the stroke of the telescopic disc 3 moving downward to the limit state is uncontrollable. At this time, by providing the waist-shaped groove 311 and the limiting shaft 52, the limit state of the telescopic disc 3 moving downward is achieved, which facilitates the telescopic disc 3 to be located in the middle of the annular groove 23 and the rubber sealing plug 34 to pass through the exhaust hole 11. By rotating the limiting shaft 52 through the knob 53, the end of the limiting shaft 52 is embedded in the limiting groove 312, so that the end of the limiting shaft 52 is embedded in the limiting groove 312, thereby restricting the telescopic movement of the pressing block 31 and the telescopic disc 3, and avoiding the situation that the telescopic disc 3 moves due to accidental contact with the pressing block 31.

[0027] When the rubber sealing plug 34 is embedded in the exhaust hole 11, the second guiding angle 342 of the rubber sealing plug 34 facilitates the embedding of the rubber sealing plug 34 in the exhaust hole 11; when the rubber sealing plug 34 is reset after passing through the exhaust hole 11, the first guiding angle 341 of the rubber sealing plug 34 facilitates the re-embedding of the rubber sealing plug 34 at the exhaust hole 11. By providing the rubber protective sleeve 35, the upper end of the pressing block 31 is protected, so that buffering can be performed during pressing.

[0028] This specific embodiment is only an interpretation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A gearbox structure for facilitating exhaust, comprising a gearbox body (1), an exhaust hole (11) arranged on the top of the gearbox body (1), characterized in that: The gearbox body (1) is provided with a telescopic sleeve (2) surrounding the exhaust hole (11) and having a central hole, a first rubber sealing ring (21) is provided between the lower surface of the telescopic sleeve (2) and the gearbox body (1), and a plurality of fixing screws (22) are provided between the bottom of the telescopic sleeve (2) and the gearbox body (1); A telescopic disc (3) having a pressing block (31) on the top with a central hole extending therethrough is telescopically arranged in the telescopic sleeve (2); a second rubber sealing ring (32) is embedded in the circumference of the telescopic disc (3) and pressed against the inner wall of the telescopic sleeve (2); a guide shaft (33) is arranged on the lower surface of the telescopic disc (3); a rubber sealing plug (34) is embedded in and pressed against the inner side of the exhaust hole (11) at the lower end of the guide shaft (33); a compression spring (4) is sleeved on the guide shaft (33) and has two ends pressed between the telescopic disc (3) and the gearbox body (1) and drives the telescopic disc (3) to move upward; An annular groove (23) having a thickness greater than that of the telescopic disc (3) is provided in the telescopic sleeve (2); when the elastic force of the compression spring (4) is overcome so that the telescopic disc (3) moves downward to an extreme state, the telescopic disc (3) is located in the middle of the annular groove (23), and the rubber sealing plug (34) passes through the exhaust hole (11); A locking structure for limiting or unlocking the telescopic disc (3) is provided between the telescopic sleeve (2) and the pressing block (31).

2. A gearbox structure for facilitating exhaust according to claim 1, characterized in that: The pressing block (31) is provided with a waist-shaped groove (311) extending along the telescopic direction of the telescopic disc (3) on its circumferential side; the telescopic sleeve (2) is provided with a connecting seat (51) on its upper surface; the connecting seat (51) is provided with a limiting shaft (52) with one end embedded in the waist-shaped groove (311); when the limiting shaft (52) is at the uppermost end of the waist-shaped groove (311), the telescopic disc (3) moves downward to an extreme state.

3. A gearbox structure for facilitating exhaust according to claim 2, characterized in that: The pressing block (31) is provided with a limiting groove (312) on the circumferential side thereof and is communicated with the lower end of the waist-shaped groove (311); the limiting shaft (52) is threadedly connected to the connecting seat (51) and passes through the connecting seat (51); a knob (53) is provided at one end of the limiting shaft (52) away from the waist-shaped groove (311); and the locking structure is composed of the limiting groove (312), the limiting shaft (52), the connecting seat (51) and the knob (53).

4. A gearbox structure for facilitating exhaust according to claim 3, characterized in that: The upper edge of the rubber sealing plug (34) is provided with a first guide angle (341), and the lower edge of the rubber sealing plug (34) is provided with a second guide angle (342).

5. The gearbox structure for facilitating exhaust according to claim 1, characterized in that: The upper end of the pressing block (31) is wrapped with a rubber protective sleeve (35).

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