Bearing grease discharge device

Abstract

The utility model provides a bearing lubricating grease discharging device belongs to bearing lubrication technical field, including the casing, the casing has piston chamber and gear chamber, and the piston chamber is connected with the grease suction hole and the grease discharge hole, the piston includes piston rod and the piston head of fixed connection in piston rod end, and the piston rod is located in the gear chamber, and the piston head movable seal assembly is in the piston chamber, and the piston inhales the waste lubricating grease from the grease suction hole to the piston chamber and discharges through the grease discharge hole through reciprocating motion, gear transmission mechanism, gear transmission mechanism is located in the gear chamber, including the driving gear and the driven eccentric gear that mesh with each other. This scheme drives piston rod reciprocating motion through the gear eccentric structure, realizes the synchronous movement of many piston rods through the transmission support, makes the driven eccentric gear always mesh with the driving gear through the elastic structure, simplifies the complex hydraulic or pneumatic drive system of traditional grease suction and discharge device, is applicable to the maintenance demand of large -scale bearing or multipoint lubrication system, ensures the steady and reliable transmission process.

Description

Technical Field

[0001] This utility model relates to the field of bearing lubrication technology, and specifically to a bearing grease discharge device. Background Technology

[0002] Bearings are key components in mechanical transmission systems, primarily used to support rotating shafts or other moving parts, thereby reducing friction, bearing loads, and positioning and guiding moving components. Their performance directly affects the operating efficiency and service life of mechanical equipment. To reduce friction and wear, bearings are usually filled with lubricating oil. Good lubrication also ensures heat dissipation and prevents corrosion, ensuring the bearing can operate stably for a long time. However, after prolonged use, lubricating oil may fail due to impurities such as friction debris, dust, and moisture, or due to its own aging.

[0003] In industrial applications, adding and replacing grease in bearings is a routine maintenance task. During operation and maintenance, replacing grease in bearings usually requires draining the old grease, which typically requires the use of a grease suction device. For example, invention patent CN113803624A discloses a grease suction device and a waste grease collection device. This grease suction device, by setting up a grease suction power channel, a grease suction power branch channel, a one-way valve action branch channel, and a resistance structure, guides the oil discharge one-way valve to close before the piston rod pump suctions grease, preventing grease in the one-way valve discharge chamber from flowing back into the gear chamber, thus solving the problem of low waste grease suction efficiency of the grease suction device.

[0004] However, existing grease suction devices are mostly complex in structure and relatively expensive. When replacing grease in large bearings, it is often necessary to drain grease from multiple nodes at the same time, which is difficult to meet the requirements of the working conditions. Utility Model Content

[0005] The purpose of this invention is to provide a bearing grease discharge device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A bearing grease discharge device, comprising:

[0008] The housing has a piston chamber and a gear chamber, and the piston chamber is connected to a liposuction port and a lipoextraction port;

[0009] The piston includes a piston rod and a piston head fixedly connected to the end of the piston rod. The piston rod is located in the gear cavity, and the piston head is movably and sealed in the piston cavity. The piston draws waste grease into the piston cavity through the grease suction hole through reciprocating motion and discharges it through the grease discharge hole.

[0010] The gear transmission mechanism is located inside the gear cavity and includes a driving gear and a driven eccentric gear that mesh with each other. The driving shaft of the driving gear is connected to a drive motor, and the driven shaft of the driven eccentric gear is rotatably connected to a transmission bracket. The transmission bracket is fixedly mounted on the piston rod. The drive motor drives the transmission bracket through the gear transmission mechanism, causing the piston to perform linear reciprocating motion. A reset bracket is also fixedly mounted on the piston rod, and an elastic structure is fixedly mounted on the reset bracket to keep the driven eccentric gear and the driving gear always meshing.

[0011] Preferably, there are several piston rods arranged in parallel to each other, and the piston rods are fixedly connected to each other by a transmission bracket and a reset bracket so that they move synchronously.

[0012] Preferably, the driving gear is an eccentric gear, the motor is a geared motor, and the motor shaft and the driving shaft of the driving gear are fixedly connected by a coupling.

[0013] Preferably, the reset bracket is fixedly installed on the side close to the drive gear, and the elastic structure is a tension spring. One end of the tension spring is fixedly installed on the reset bracket, and the other end of the tension spring is fixedly installed on the inner wall of the gear cavity.

[0014] Preferably, a one-way valve is provided at the grease discharge hole to allow grease to be discharged in one direction.

[0015] Preferably, a sealing ring and a dustproof ring are fixedly installed between the piston chamber and the piston.

[0016] Preferably, the end of the piston chamber away from the piston is sealed with a plug.

[0017] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0018] This solution simplifies the complex hydraulic or pneumatic drive system of traditional grease suction devices by employing a gear-eccentric structure to drive the reciprocating motion of the piston rod. It has fewer parts, is easier to assemble, and reduces manufacturing costs. The transmission bracket enables synchronous movement of multiple piston rods, allowing for simultaneous discharge of waste grease from multiple lubrication points. This is suitable for the maintenance needs of large bearings or multi-point lubrication systems, significantly improving work efficiency. An elastic structure ensures that the driven eccentric gear always meshes with the driving gear, guaranteeing smooth and reliable transmission and preventing operational failures caused by gear disengagement. This solution is particularly suitable for the maintenance of large bearings requiring simultaneous multi-point grease removal, solving the problem of existing equipment being unable to meet complex working conditions. Furthermore, its relatively low cost and easy assembly facilitate large-scale application. Attached Figure Description

[0019] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0020] Figure 1 This is a schematic diagram of the working state 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the working state 2 of this utility model;

[0022] Figure 3 This is a schematic diagram of the shell structure of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Housing; 11. Piston chamber; 12. Gear chamber; 13. Suction port; 14. Grease discharge port; 15. Sealing ring; 16. Dustproof ring; 17. Plug; 2. Piston; 21. Piston rod; 22. Piston head; 3. Transmission mechanism; 31. Driving gear; 32. Driving shaft; 33. Driven eccentric gear; 34. Driven shaft; 4. Transmission bracket; 5. Reset bracket; 6. Elastic structure. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] This design utilizes the meshing of the driving gear 31 and the driven eccentric gear 33 to achieve a relatively long horizontal movement distance for the piston 2. Multiple suction holes 13 and discharge holes 14 are provided to achieve multi-node synchronous suction and discharge of bearing grease. During operation, the external switch of the device is activated, the motor starts, and the driving gear 31 drives the driven eccentric gear 33. During this process, the elastic structure 6 ensures that the driving gear 31 and the driven eccentric gear 33 remain meshed. The driving shaft 32 of the driving gear 31 rotates in a fixed position, while the driven shaft 34 of the driven eccentric gear 33 maintains linear reciprocating motion, thereby driving the piston 2 in linear reciprocating motion. Through the setting of a one-way valve, a negative pressure is created when the piston 2 exits the piston chamber 11, causing waste grease to be sucked into the piston chamber 11 from the suction holes 13. When the piston 2 compresses the space of the piston chamber 11, the waste grease is discharged from the discharge holes 14 to an external waste oil collection device, thus realizing the discharge and collection of waste grease from the bearing.

[0027] After introducing the basic principles of this utility model, various non-limiting embodiments of this utility model are described in detail below. Any quantity of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0028] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0029] Example 1

[0030] A bearing grease discharge device, such as Figure 1-3 As shown, the device includes a housing 1, a piston 2, and a gear transmission mechanism 3. The housing 1 has a piston chamber 11 and a gear chamber 12. The piston chamber 11 is connected to a grease suction port 13 and a grease discharge port 14. The piston 2 includes a piston rod and piston heads 22 fixedly connected to both ends of the piston rod 21. The piston 2 is located within the gear chamber 12 and extends to both ends, such that the piston heads 22 are located within the piston chamber 11 and form a movable sealed assembly with the piston chamber 11. The end of the piston chamber 11 away from the piston 2 is removably sealed with a plug 17 for easy maintenance. The gear transmission mechanism 3 is located within the gear chamber 12 and is driven by a motor to drive the piston 2 in a linear reciprocating motion, causing waste grease to be drawn into the piston chamber 11 from the grease suction port 13 and discharged through the grease discharge port 14.

[0031] Specifically, in this embodiment, two pistons 2 are arranged in parallel. Correspondingly, four liposuction holes 13 are located at both ends of the pistons 2, and two adjacent piston holes on the same side share one liposuction hole 14, meaning there are two liposuction holes 14. In other embodiments, more pistons 2 can be arranged in parallel according to actual application conditions to meet the need for simultaneous liposuction and liposuction at more nodes.

[0032] The piston rods 21 are fixedly connected by the transmission bracket 4 and the reset bracket 5, so that all piston rods 21 move synchronously. The preferred installation method is that the transmission bracket 4 and the reset bracket 5 are parallel to each other and fixedly connected to the piston rods 21 perpendicularly to ensure the overall stability and force balance of the piston 2.

[0033] The gear transmission mechanism 3 includes a driving gear 31 and a driven eccentric gear 33 that mesh with each other. A geared motor (not shown in the figure) for driving the driving gear 31 is also fixedly installed in the gear cavity 12. The driving shaft 32 of the driving gear 31 is fixedly connected to the rotating shaft of the geared motor through a coupling. In this embodiment, the driving gear 31 is an eccentric gear. The driven shaft 34 of the driven eccentric gear 33 is rotatably connected to the transmission bracket 4. The position of the driven shaft 34 is preferably between the two piston rods 21 and equidistant from them. The position of the driving shaft 32 is always at the same horizontal plane as the driven shaft 34.

[0034] The reset bracket 5 is located on the side close to the driving gear 31. An elastic structure 6 is fixedly installed on the reset bracket 5. In this embodiment, the elastic structure 6 is a tension spring. One end of the tension spring is fixedly installed at the center of the reset bracket 5, and the other end of the tension spring is fixedly installed on the inner wall of the gear cavity 12. The tension spring is used to provide a tension force to keep the driven eccentric gear 33 and the driving gear 31 meshing, so as to ensure the stability of the gear transmission mechanism 3.

[0035] A one-way valve (not shown in the figure) for unidirectional discharge of lubricating grease is provided inside or at the connection point of the grease discharge hole 14. A sealing ring 15 and a dustproof ring 16 are fixedly installed between the piston chamber 11 and the piston 2, and the sealing ring 15 and the dustproof ring 16 are installed at the reserved installation positions in the piston chamber 11. When this scheme is running, the external switch of the device is turned on, the motor starts, and the driving gear 31 drives the driven eccentric gear 33 to move. During this process, the elastic structure 6 ensures that the driving gear 31 and the driven eccentric gear 33 always remain meshed. The driving shaft 32 of the driving gear 31 rotates in a fixed position. Through meshing transmission, the driven shaft 34 of the driven eccentric gear 33 maintains linear reciprocating motion, thereby driving the piston 2 to reciprocate linearly. By setting a one-way valve, a negative pressure is formed when the piston 2 exits the piston chamber 11 and the space becomes larger. Waste grease is sucked into the piston chamber 11 from the grease suction hole 13. When the piston 2 compresses the space of the piston chamber 11, the waste grease is discharged from the grease discharge hole 14 to the external waste oil collection device, thereby realizing the discharge and collection of waste grease in the bearing.

[0036] The above-described preferred embodiments of the present invention are provided for guidance, but it will be apparent to those skilled in the art that such embodiments are provided merely by way of example. Many modifications, alterations, and alternatives will arise in the mind and spirit of the present invention without departing from its intent. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover the modular compositions, equivalents, or alternatives within the scope of these claims.

Claims

1. A bearing grease discharge device, characterized in that, include: The housing (1) has a piston chamber (11) and a gear chamber (12). The piston chamber (11) is connected to a liposuction hole (13) and a liposuction hole (14). Piston (2), piston (2) includes piston rod (21) and piston head (22) fixedly connected to the end of piston rod (21). Piston rod (21) is located in gear cavity (12). Piston head (22) is movably sealed in piston cavity (11). Piston (2) draws waste grease from grease suction hole (13) into piston cavity (11) through reciprocating motion and discharges it through grease discharge hole (14). The gear transmission mechanism (3) is located in the gear cavity (12) and includes a driving gear (31) and a driven eccentric gear (33) that mesh with each other. The driving shaft (32) of the driving gear (31) is connected to a drive motor, and the driven shaft (34) of the driven eccentric gear (33) is rotatably connected to a transmission bracket (4). The transmission bracket (4) is fixedly installed on the piston rod (21). The drive motor drives the transmission bracket (4) through the drive gear transmission mechanism (3) to make the piston (2) perform linear reciprocating motion. A reset bracket (5) is also fixedly installed on the piston rod (21). An elastic structure (6) is fixedly installed on the reset bracket (5) to keep the driven eccentric gear (33) and the driving gear (31) meshing.

2. The bearing grease discharge device according to claim 1, characterized in that: There are several piston rods (21), which are arranged in parallel to each other. The piston rods (21) are fixedly connected to each other through the transmission bracket (4) and the reset bracket (5) so that they move synchronously.

3. The bearing grease discharge device according to claim 1, characterized in that: The drive gear (31) is an eccentric gear, the motor is a geared motor, and the motor shaft and the drive shaft (32) of the drive gear (31) are fixedly connected by a coupling.

4. The bearing grease discharge device according to claim 1, characterized in that: The reset bracket (5) is fixedly installed on the side close to the drive gear (31). The elastic structure (6) is a tension spring. One end of the tension spring is fixedly installed on the reset bracket (5), and the other end of the tension spring is fixedly installed on the inner wall of the gear cavity (12).

5. The bearing grease discharge device according to claim 1, characterized in that: A one-way valve is provided at the grease discharge hole (14) to allow grease to be discharged in one direction.

6. The bearing grease discharge device according to claim 1, characterized in that: A sealing ring (15) and a dustproof ring (16) are fixedly installed between the piston chamber (11) and the piston (2).

7. The bearing grease discharge device according to claim 1, characterized in that: The end of the piston chamber (11) away from the piston (2) is sealed with a plug (17).

Images