A worm gear reducer capable of overload protection

Abstract

The present invention relates to the field of mechanical equipment, specifically a worm gear reducer capable of overload protection, comprising a pump casing, an input shaft and an output shaft, wherein the input shaft and the output shaft are both mounted inside the pump casing via bearings, and the worm on the input shaft is meshed with the worm on the output shaft, and the pump casing is filled with gear oil. The present invention also comprises a leakage monitoring mechanism, an overload monitoring mechanism and a heat dissipation mechanism, wherein the leakage monitoring mechanism and the overload monitoring mechanism are both vertically mounted on the upper surface of the pump casing; the heat dissipation mechanism is fixedly connected to the rear side of the pump casing; the housing is mounted on the upper surface of the pump casing; the oil cylinder is vertically mounted on the left end of the upper surface of the housing, and the oil cylinder is filled with gear oil. The reducer has the function of monitoring pump casing leakage and replenishing gear oil, which is convenient for maintenance by staff, ensures heat dissipation and noise reduction, can physically monitor overload and overtemperature, achieves a dual heat dissipation effect, prevents the viscosity of the gear oil from decreasing, reduces wear between the input shaft and the output shaft, and extends the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, in particular to a worm gear reducer capable of overload protection. Background Art

[0002] A worm gear reducer is a power transmission mechanism that uses a gear speed converter to reduce the number of revolutions of the motor to the desired number of revolutions and obtain a larger torque. The basic structure is mainly composed of transmission parts such as worm gears, shafts, bearings, pump casings and their accessories. When in use, the motor drives the input shaft to rotate, and through the worm gear transmission, the output shaft drives the load to run at a low speed, and the gear oil inside the pump casing has the advantages of lubrication, reducing the wear between the worm gears, helping the worm gears to dissipate heat, and reducing working noise. As the worm gear reducer is used for a longer period of time, the wear between the transmission parts gradually increases. Once the gear oil leaks from the pump casing, the pump casing is made of metal and cannot be discovered and repaired in the first time, and the gear oil cannot be replenished, resulting in a decrease in heat dissipation and noise reduction capabilities. Moreover, the overload protection of the worm gear reducer has always been manifested in electrical control. When overloaded, the bite force between the worm wheel and the worm increases, the temperature of the pump casing rises, the viscosity of the gear oil decreases, and the wear of the transmission parts increases, which will shorten the service life of the worm gear reducer. Therefore, it is necessary to propose a worm gear reducer with overload protection. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a worm gear reducer capable of overload protection, so as to solve the problems in the above background technology that pump casing leakage and overload and overtemperature operation cannot be monitored and the pump casing cannot be cooled.

[0004] To achieve the above-mentioned objectives, an embodiment of the present invention provides the following technical solutions: a worm gear reducer capable of overload protection, comprising a pump casing, an input shaft and an output shaft, wherein the input shaft and the output shaft are both mounted inside the pump casing through bearings, and the worm on the input shaft is meshed with the worm gear on the output shaft, and the pump casing is filled with gear oil. The worm gear reducer capable of overload protection also includes a leakage monitoring mechanism, an overload monitoring mechanism and a heat dissipation mechanism, wherein the leakage monitoring mechanism and the overload monitoring mechanism are both vertically mounted on the upper surface of the pump casing; the heat dissipation mechanism is fixedly connected to the rear side of the pump casing.

[0005] Optionally, the purpose is to monitor the pump casing for leaks and to replenish the leaked gear oil. The leakage monitoring mechanism includes a box body, an oil cylinder, a first piston, a connecting rod, a first rack, a guide tube, a dial, a rotating shaft, a pointer, a gear, a guide rod, a counterweight, and a second rack. The box body is mounted on the upper surface of the pump casing; the oil cylinder is vertically mounted on the left end of the upper surface of the box body, and the oil cylinder is filled with gear oil; the first piston is inserted into the bottom end of the inner cavity of the oil cylinder so as to slide up and down; one end of the connecting rod is mounted on the bottom end of the first piston; the first rack is vertically mounted on the other end of the connecting rod; one end of the guide tube is mounted on The other end of the conduit is connected to the upper surface of the oil cylinder; the dial is bonded to the front of the box; the rotating shaft is installed in the center of the box through a bearing; the pointer and the gear are respectively installed at the front and rear ends of the outer wall of the rotating shaft, and the gear is meshed with the first rack. The position of the dial is indicated by the pointer, so that the gear oil volume in the oil cylinder can be known; the guide rod is vertically installed at the right end of the inner cavity of the box; the counterweight block is slidably mounted on the outer wall of the guide rod; the second rack is installed on the left side wall of the counterweight block, and the second rack is meshed with the gear, and the second rack is lowered under the action of the gravity of the counterweight block.

[0006] Optionally, a protrusion is provided on the inner wall of the oil cylinder in a vertical direction.

[0007] Optionally, the first rack and the second rack are rotated 180 degrees relative to the center point of the gear so as to overlap.

[0008] Optionally, the purpose is to convert the volume change of mercury into mechanical motion to monitor the overtemperature of the pump casing. The overload monitoring mechanism includes a mercury box, mercury liquid, a piston cylinder, a second piston, a piston rod, a guide column and a trigger assembly. The mercury box is fixedly connected to the upper surface of the pump casing; the mercury liquid is filled in the inner cavity of the mercury box; the piston cylinder is vertically installed at the center position of the upper surface of the mercury box; the second piston is inserted into the bottom end of the inner cavity of the piston cylinder so as to be able to slide up and down; one end of the piston rod is installed at the center position of the top of the second piston; the guide column is horizontally installed at the other end of the piston rod; and the trigger assembly is fixedly connected to the top of the piston cylinder.

[0009] Optionally, the purpose is to alarm for overtemperature of the pump casing, and the trigger assembly includes a sensing box, a buzzer, a limit rod, a spring, a push plate, a guide groove and a proximity switch, the sensing box is fixedly connected to the top of the piston cylinder; the buzzer is installed on the right side wall of the sensing box; there are two limit rods, which are respectively inserted into the upper and lower ends of the rear side of the sensing box; the spring is sleeved on the outer wall of the limit rod; the push plate is installed at the front end of the limit rod, and is pushed forward by the spring force, and a guide groove is provided on the left side wall of the push plate, and the guide column is inserted in the inner cavity of the guide groove; the proximity switch is installed on the lower surface of the sensing box, and the proximity switch is electrically connected to the buzzer.

[0010] Optionally, the guide grooves are distributed on the outer wall of the push plate and are inclined downward from front to back.

[0011] Optionally, the purpose is to dissipate heat when the pump casing is overheated and reduce wear between transmission components. The heat dissipation mechanism includes a heat sink, a cooling fan, a bracket, a nozzle, a water tank and a water pump. The heat sink is fixedly connected to the rear wall of the pump casing; there are several cooling fans, which are installed at the bottom of the heat sink from left to right, and the cooling fan is electrically connected to the proximity switch; the bracket is installed at the rear side of the heat sink; the nozzle is installed laterally on the inside of the bracket; the water tank is installed on the top of the bracket; the water pump is installed on the lower surface of the water tank, the water pump inlet is connected to the bottom of the water tank, the water pump outlet is connected to the nozzle, the water pump is electrically connected to the proximity switch, and the water in the water tank is introduced into the nozzle under the suction of the water pump.

[0012] As a further solution of the present invention, the spraying direction of the nozzle is directed toward the heat sink.

[0013] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0014] 1. The present invention drives the second rack to descend by the gravity of the counterweight block. Under the transmission of the gear and the first rack, the connecting rod pushes the first piston to move upward, and the gear oil in the oil cylinder is introduced into the pump casing to replenish the gear oil leaked in the pump casing. The rotating shaft drives the pointer to rotate. The gear oil volume in the oil cylinder can be seen from the scale on the dial, and then it is known that there is a leak in the pump casing. It has the function of pump casing leakage monitoring and gear oil replenishment, which is convenient for staff to maintain and ensure heat dissipation and noise reduction.

[0015] 2. The present invention senses the temperature of the pump casing through mercury liquid. As the temperature increases, the mercury liquid gradually expands, and the second piston moves upward along the piston cylinder, prompting the guide column to squeeze the guide groove slope, allowing the push plate to move backward. When the pump casing overheats, the volume expansion of the mercury liquid can cause the push plate to block the proximity switch. The proximity switch energizes the buzzer and sounds, reminding the worker that the temperature is overloaded and overheated. Overload and overtemperature can be monitored physically.

[0016] 3. The present invention introduces water from the water tank into the nozzle through the suction of the water pump, and the nozzle sprays water onto the surface of the heat sink. The water vaporization process absorbs heat and takes away the heat of the heat sink. The cooling fan generates airflow to take away the heat from the surface of the heat sink, achieving a dual heat dissipation effect, preventing the viscosity of the gear oil from decreasing, reducing the wear between the input shaft and the output shaft, and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the leakage monitoring mechanism of the present invention.

[0019] Figure 3 This is a front cross-sectional view of the leakage monitoring mechanism of the present invention.

[0020] Figure 4 It is a structural diagram of the overload monitoring mechanism of the present invention.

[0021] Figure 5 This is a front cross-sectional view of the overload monitoring mechanism of the present invention.

[0022] Figure 6 It is the right side view of the trigger assembly of the present invention.

[0023] Figure 7 This is an exploded view of the heat dissipation mechanism of the present invention.

[0024] Figure: 1, pump housing; 2, input shaft; 3, output shaft; 4, leakage monitoring mechanism; 5, overload monitoring mechanism; 6, heat dissipation mechanism; 41, housing; 42, oil cylinder; 43, first piston; 44, connecting rod; 45, first rack; 46, guide tube; 47, dial; 48, rotating shaft; 49, pointer; 410, gear; 411, guide rod; 412, counterweight; 413, second rack; 51, water Silver box; 52. Mercury liquid; 53. Piston cylinder; 54. Second piston; 55. Piston rod; 56. Guide column; 57. Trigger assembly; 571. Sensor box; 572. Buzzer; 573. Limit rod; 574. Spring; 575. Push plate; 576. Guide groove; 577. Proximity switch; 61. Heat sink; 62. Cooling fan; 63. Bracket; 64. Nozzle; 65. Water tank; 66. Water pump. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] For examples, see Figure 1-Figure 7 In an embodiment of the present invention, a worm gear reducer with overload protection includes a pump casing 1, an input shaft 2 and an output shaft 3. The input shaft 2 and the output shaft 3 are installed inside the pump casing 1 through bearings. The worm on the input shaft 2 is meshed with the worm gear on the output shaft 3. The input shaft 2 is connected to the motor through a coupling. The input shaft 2 is driven to rotate by the motor, and the output shaft 3 drives the load to rotate. The pump casing 1 is filled with gear oil. A leakage monitoring mechanism 4 and an overload monitoring mechanism 5 are vertically installed on the left and right sides of the upper surface of the pump casing 1 respectively. A heat dissipation mechanism 6 is fixedly connected to the rear side of the pump casing 1.

[0028] Further, such as Figure 2 and Figure 3 As shown, the leakage monitoring mechanism 4 includes a box body 41 installed on the left end of the upper surface of the pump housing 1, an oil cylinder 42 is vertically installed on the left end of the top of the box body 41, the inner cavity of the oil cylinder 42 is filled with gear oil, and a first piston 43 that can move up and down is inserted at the bottom of the inner cavity of the oil cylinder 42, one end of a connecting rod 44 is installed at the bottom of the first piston 43, and a first rack 45 is installed at the other end of the connecting rod 44. A protrusion is provided on the inner wall of the oil cylinder 42 in the vertical direction to prevent the first rack 45 from rotating, one end of a conduit 46 is installed on the left end of the upper surface of the oil cylinder 42, and the other end of the conduit 46 is connected to the top of the box body 41, a dial 47 is bonded to the front of the box body 41, and a rotating shaft 48 is installed at the center of the box body 41 through a bearing, and indicator The needle 49 and the gear 410 point to the position on the dial 47 through the pointer 49, indicating the gear oil volume in the oil cylinder 42. The gear 410 is meshed with the first rack 45. A guide rod 411 is vertically installed on the right side of the inner cavity of the box body 41. The outer wall of the guide rod 411 is sleeved with a counterweight block 412 that can slide up and down. The left wall of the counterweight block 412 is installed with a second rack 413 that is meshed with the gear 410. The first rack 45 and the second rack 413 are rotated 180 degrees relative to the center point of the gear 410 to overlap. Under the action of the gravity of the counterweight block 412, the second rack 413 is lowered. Under the transmission of the gear 410 and the first rack 45, the first piston 43 can move upward along the inner wall of the oil cylinder 42 to squeeze out the gear oil in the oil cylinder 42.

[0029] Further, such as Figure 4 As shown, the overload monitoring mechanism 5 includes a mercury box 51 installed on the upper surface of the pump housing 1. The inner cavity of the mercury box 51 is filled with mercury liquid 52. A piston cylinder 53 is vertically installed at the center of the top of the mercury box 51. A second piston 54 that can move up and down is inserted at the bottom of the inner cavity of the piston cylinder 53. As the volume of the mercury liquid 52 increases or decreases, the second piston 54 can rise or fall. One end of a piston rod 55 is installed on the top of the second piston 54, and a guide column 56 is installed on the other end of the piston rod 55. A trigger assembly 57 is fixedly connected to the top of the piston cylinder 53.

[0030] Further, such as Figure 5 and Figure 6As shown, the trigger assembly 57 includes a sensing box 571 fixedly connected to the top of the piston cylinder 53, a buzzer 572 is installed on the right side wall of the sensing box 571, and limit rods 573 are inserted at the upper and lower ends of the rear side wall of the sensing box 571. A spring 574 is sleeved on the outer wall of the limit rod 573, and a push plate 575 is installed at the front end of the limit rod 573. Under the elastic force of the spring 574, the push plate 575 is pushed forward. A guide groove 576 is provided on the left side wall of the push plate 575, and a guide column 56 is inserted into the inner cavity of the guide groove 576. The guide groove 576 is inclined downward from front to back. When the push plate 575 moves back and forth, the inclined surface of the guide groove 576 can squeeze the guide column 56 downward or upward. A proximity switch 577 electrically connected to the buzzer 572 is installed at the bottom of the sensing box 571.

[0031] Further, such as Figure 7 As shown, the heat dissipation mechanism 6 includes a heat sink 61 fixedly connected to the rear side of the pump casing 1. The heat on the pump casing 1 can be thermally conducted to the heat sink 61. Several cooling fans 62 are installed at the bottom of the heat sink 61 from left to right. The cooling fans 62 are electrically connected to the proximity switch 577. The cooling fans 62 generate wind force from bottom to top, increase the air flow rate around the heat sink 61, and take away the heat on the heat sink 61. A bracket 63 is installed on the rear side of the heat sink 61, and a nozzle 64 is installed laterally on the inside of the bracket 63. The spray direction of the nozzle 64 points to the heat sink 61, and water droplets are sprayed onto the heat sink 61. The water droplets absorb heat when vaporized and take away the heat on the heat sink 61, realizing double heat dissipation. A water tank 65 is installed on the top of the bracket 63, and a water pump 66 is installed at the bottom of the water tank 65. The liquid inlet of the water pump 66 is connected to the bottom of the water tank 65, and the liquid outlet of the water pump 66 is connected to the outer wall of the nozzle 64.

[0032] Working principle:

[0033] Step 1: When the gear oil leaks in the pump housing 1, the pressure in the pump housing 1 drops, and the gravity of the counterweight 412 drives the second rack 413 to drop. Under the transmission of the gear 410 and the first rack 45, the connecting rod 44 can pull the first piston 43 to move upward along the inner wall of the oil cylinder 42, squeezing the gear oil in the oil cylinder 42, and introducing the gear oil into the pump housing 1 through the guide tube 46 to replenish the gear oil. At the same time, the rotating shaft 48 also drives the pointer 49 to rotate. By checking the position of the pointer 49 pointing to the dial 47, the gear oil capacity in the oil cylinder 42 can be known, so that the working personnel can promptly discover the problem of poor sealing and leakage in the pump housing 1;

[0034] Step 2: As the pump housing 1 heats up during operation, the volume of the mercury liquid 52 gradually increases, and the mercury liquid 52 pushes the second piston 54 to move upward along the inner wall of the piston cylinder 53. The guide column 56 moves upward to squeeze the inclined surface of the guide groove 576, prompting the push plate 575 to move backward and squeeze the spring 574. Once the operating temperature of the pump housing 1 exceeds the limit, the second piston 54 rises to a height that allows the push plate 575 to block the proximity switch 577. The proximity switch 577 starts the buzzer 572, the cooling fan 62, and the water pump 66. The buzzer 572 sounds an alarm to remind the staff that the input shaft 2 and the output shaft 3 are overloaded.

[0035] In step three, the water pump 66 introduces the water in the water tank 65 into the nozzle 64 under the action of its own suction, and the nozzle 64 sprays water droplets toward the heat sink 61. The cooling fan 62 provides wind force from bottom to top, which can not only increase the air flow velocity around the heat sink 61 and take away the heat on the surface of the heat sink 61, but also accelerate the vaporization of water, and the vaporization absorbs heat, thereby performing double cooling of the heat sink 61, preventing the gear oil in the pump housing 1 from heating up and decreasing its viscosity, and reducing the wear of the input shaft 2 and the output shaft 3.

[0036] The above are only preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A worm gear reducer capable of overload protection, comprising a pump housing (1), an input shaft (2) and an output shaft (3), wherein the input shaft (2) and the output shaft (3) are both mounted inside the pump housing (1) via bearings, and the worm on the input shaft (2) is meshed with the worm wheel on the output shaft (3), and the pump housing (1) is filled with gear oil, characterized in that: The worm gear reducer capable of overload protection further comprises: a leakage monitoring mechanism (4), an overload monitoring mechanism (5) and a heat dissipation mechanism (6); The leakage monitoring mechanism (4) and the overload monitoring mechanism (5) are both vertically mounted on the upper surface of the pump casing (1), and the heat dissipation mechanism (6) is fixedly connected to the rear side of the pump casing (1); The leakage monitoring mechanism (4) comprises: a box (41), an oil cylinder (42), a first piston (43), a connecting rod (44), a first rack (45), a guide tube (46), a dial (47), a rotating shaft (48), a pointer (49), a gear (410), a guide rod (411), a counterweight (412), and a second rack (413); The box body (41) is mounted on the upper surface of the pump housing (1), the oil cylinder (42) is vertically mounted on the left end of the upper surface of the box body (41), the oil cylinder (42) is filled with gear oil, the first piston (43) is inserted into the bottom end of the inner cavity of the oil cylinder (42) so as to slide up and down, one end of the connecting rod (44) is mounted on the bottom end of the first piston (43), the first rack (45) is vertically mounted on the other end of the connecting rod (44), one end of the guide tube (46) is mounted on the upper surface of the oil cylinder (42), the other end of the guide tube (46) is connected to the upper surface of the pump housing (1), the dial (47) is bonded to the front of the box body (41), and the rotating shaft (48) is mounted in the box body (41) through a bearing. The center position is set, the pointer (49) and the gear (410) are respectively installed at the front and rear ends of the outer wall of the rotating shaft (48), and the gear (410) is meshed with the first rack (45). The position of the dial (47) is indicated by the pointer (49), and the gear oil volume in the oil cylinder (42) can be known. The guide rod (411) is vertically installed at the right end of the inner cavity of the box (41), and the counterweight (412) is slidably sleeved on the outer wall of the guide rod (411). The second rack (413) is installed on the left side wall of the counterweight (412), and the second rack (413) is meshed with the gear (410). Under the action of the gravity of the counterweight (412), the second rack (413) is lowered; The overload monitoring mechanism (5) comprises: a mercury box (51), mercury liquid (52), a piston cylinder (53), a second piston (54), a piston rod (55), a guide column (56), and a trigger assembly (57); The mercury box (51) is fixedly connected to the upper surface of the pump housing (1), the mercury liquid (52) is filled in the inner cavity of the mercury box (51), the piston cylinder (53) is vertically installed at the center position of the upper surface of the mercury box (51), the second piston (54) is inserted into the bottom end of the inner cavity of the piston cylinder (53) so as to be able to slide up and down, one end of the piston rod (55) is installed at the center position of the top of the second piston (54), the guide column (56) is horizontally installed at the other end of the piston rod (55), and the trigger assembly (57) is fixedly connected to the top end of the piston cylinder (53); The trigger assembly (57) includes: a sensing box (571), a buzzer (572), a limiting rod (573), a spring (574), a push plate (575), a guide groove (576) and a proximity switch (577); The induction box (571) is fixedly connected to the top of the piston cylinder (53), the buzzer (572) is installed on the right side wall of the induction box (571), the number of limit rods (573) is two, which are respectively plugged into the upper and lower ends of the rear side of the induction box (571), the spring (574) is sleeved on the outer wall of the limit rod (573), the push plate (575) is installed at the front end of the limit rod (573), and the push plate (575) is pushed forward under the elastic force of the spring (574), the left side wall of the push plate (575) is provided with a guide groove (576), and the guide column (56) is plugged into the inner cavity of the guide groove (576), the proximity switch (577) is installed on the lower surface of the induction box (571), and the proximity switch (577) is electrically connected to the buzzer (572).

2. The worm gear reducer with overload protection according to claim 1, characterized in that: A protrusion is provided on the inner wall of the oil cylinder (42) in a vertical direction.

3. The worm gear reducer capable of overload protection according to claim 2, characterized in that: The first rack (45) and the second rack (413) are rotated 180 degrees relative to the center point of the gear (410) to overlap.

4. The worm gear reducer capable of overload protection according to claim 3, characterized in that: The guide grooves (576) are distributed on the outer wall of the push plate (575) in a downwardly inclined manner from front to back.

5. The worm gear reducer capable of overload protection according to claim 4, characterized in that: The heat dissipation mechanism (6) includes: a heat sink (61), a heat dissipation fan (62), a bracket (63), a nozzle (64), a water tank (65) and a water pump (66); The heat sink (61) is fixedly connected to the rear side wall of the pump housing (1), and the number of heat dissipation fans (62) is several and they are installed at the bottom of the heat sink (61) from left to right, and the heat dissipation fans (62) are electrically connected to the proximity switch (577). The bracket (63) is installed at the rear side of the heat sink (61), the nozzle (64) is installed laterally on the inner side of the bracket (63), the water tank (65) is installed on the top of the bracket (63), and the water pump (66) is installed on the lower surface of the water tank (65). The liquid inlet of the water pump (66) is connected to the bottom of the water tank (65), and the liquid outlet of the water pump (66) is connected to the nozzle (64). The water pump (66) is electrically connected to the proximity switch (577), and the water in the water tank (65) is introduced into the nozzle (64) under the suction of the water pump (66).

6. The worm gear reducer capable of overload protection according to claim 5, characterized in that: The spraying direction of the nozzle (64) is directed toward the heat sink (61).

Images