CN218927868U - Hydraulic driving joint - Google Patents

Abstract

The utility model provides a hydraulic driving joint, which comprises a blocking cover, a mechanical seal, a fixing screw, a compression spring, an annular extrusion piece, a rubber sealing ring, a shaft sealing check ring and an O-shaped sealing ring, wherein the O-shaped sealing ring is symmetrically embedded in the left end face and the right end face of a connecting shell, the rubber sealing ring is symmetrically arranged in the left end face and the right end face of the connecting shell, the annular extrusion piece is attached to the left end face of the rubber sealing ring, the compression spring is clamped on the left end face of the annular extrusion piece, the shaft sealing check ring is embedded in the left end face of a butt joint seat, the fixing screw is symmetrically inserted in the upper side, the lower side, the front side and the rear side of the inside of the butt joint seat, the blocking cover is embedded in the right end face of the butt joint seat, and the blocking cover Zuo Duanmian is attached to the mechanical seal.

Description

A hydraulic drive joint

technical field

The utility model relates to a hydraulically driven joint, which belongs to the technical field of hydraulically driven joints.

Background technique

With the rapid development of industrial technology, industrial robots are widely used in assembly, welding, handling and other industries, which greatly improves the automation level of industrial production and liberates humans from repetitive labor or extremely harsh working environments. Drive joints are an important part of industrial robots.

Chinese Patent No. CN216781875U proposes a hydraulically driven joint for an industrial robot. Although the rear seal block and the front seal block can ensure the sealing of the front and rear sides and the airtightness of the entire device, the rear seal block and the front seal block are used for a period of time in actual use. Deformation will occur after a period of time, which will lead to the decrease of the sealing performance of the rear sealing block and the front sealing block, and then affect the sealing performance between the shell and the fixed seat and the flange cover. Now there is an urgent need for a hydraulically driven joint to solve the above problems.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of this utility model is to provide a hydraulically driven joint to solve the problems raised in the above-mentioned background technology. The utility model has a reasonable structure and good sealing performance, and avoids easy leakage at the connection of the drive joint .

In order to achieve the above object, the utility model is achieved through the following technical solutions: a hydraulically driven joint, including a transmission shaft, a docking seat, a connecting shell, a fixing seat and a sealing assembly, the left end of the connecting shell is equipped with a fixing seat, A docking seat is installed on the right end face of the connecting shell, and a sealing assembly is arranged symmetrically on the left and right end faces of the connecting shell, and a transmission shaft is arranged inside the docking seat, and the sealing assembly includes a blocking cover, a mechanical seal, a fixed screw, a compression spring, Ring extrusion piece, rubber sealing ring, shaft sealing retaining ring and O-ring, the left and right end faces of the connection shell are symmetrically embedded with O-ring sealing rings, and the left and right end faces of the connecting shell are symmetrically provided with rubber sealing rings. The left end surface of the rubber sealing ring is bonded with an annular extruded piece, and the left end surface of the annular extruded piece is clamped with a compression spring. Fixed screws are symmetrically interspersed on the front and rear sides, the right end surface of the docking seat is embedded with a blocking cover, and the left end surface of the blocking cover is fitted with a mechanical seal.

Further, two groups of O-shaped sealing rings are embedded, and the specifications of the two groups of O-shaped sealing rings are the same, and there are two groups of rubber sealing rings, and the specifications of the two groups of rubber sealing rings are the same. Made of EPDM rubber.

Further, two groups of ring-shaped extruding sheets are bonded, and the specifications of the two groups of annular extruding sheets are the same. There are multiple compression spring clips, and the specifications of the plurality of compression springs are the same. The inner right side of the fixing seat An annular groove is formed on the inner left side of the docking seat, and the annular groove matches the annular extrusion piece.

Further, the right side of the upper end surface of the transmission shaft is provided with a positioning keyway, the left side of the annular side of the transmission shaft is provided with a rotating blade, and the rotating blade is connected to the transmission shaft by welding, and the left side of the annular side of the transmission shaft is provided with a The follower plate is connected with the transmission shaft through welding.

Further, oil nipples are symmetrically arranged on both sides of the upper end of the connecting shell, and an annular oil cavity is opened inside the connecting shell, and the annular oil cavity matches the rotating blade, and the oil nipple communicates with the annular oil cavity.

Further, a first mounting flange is welded on the left side of the ring side of the fixing seat, and a second mounting flange is welded on the right side of the ring side of the docking seat.

Further, there are four fixed screws interspersed, and the four fixed screws have the same specifications, the right ends of the four fixed screws are all provided with inner hexagonal caps, and the left sides of the ring sides of the four fixed screws are all engaged with anti-loosening nuts .

Beneficial effects of the utility model: a hydraulically driven joint of the utility model, because the utility model adds a mechanical seal, a compression spring, an annular extruded piece, a rubber sealing ring, a sealing retaining ring for a shaft and an O-shaped sealing ring, through Two sets of O-rings are embedded to make the sealing between the connecting shell and the fixing seat and the docking seat better, and the two sets of rubber sealing rings further improve the sealing between the connecting shell and the fixing seat and the docking seat, and more A compression spring will exert a pressing force on the two sets of annular extrusion pieces, so that the two sets of annular extrusion pieces can squeeze the two sets of rubber sealing rings, so as to improve the sealing ability of the rubber sealing rings. By inserting the mechanical seal, the The seal between the transmission shaft and the docking seat is better, and the seal between the follower plate and the docking seat is better when the shaft uses a sealing retainer ring. Through our improvement, the sealing performance of the drive joint joint has increased by 37%.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

Fig. 1 is the structural representation of a kind of hydraulic drive joint of the present utility model;

Fig. 2 is a front sectional view of a seal assembly in a hydraulic drive joint of the present invention;

Fig. 3 is a top sectional view of a sealing assembly in a hydraulic drive joint of the present invention;

Fig. 4 is a right side sectional view of a connecting shell in a hydraulic drive joint of the present invention;

Figure 5 is a partially enlarged view of Figure 2;

In the figure: 1-drive shaft, 11-positioning keyway, 12-rotating blade, 13-follower plate, 2-docking seat, 21-second mounting flange, 3-connecting shell, 31-oil nozzle, 4-fixing Seat, 41-first mounting flange, 5-seal assembly, 51-blocking cover, 52-mechanical seal, 53-fixing screw, 531-inner hexagon cap, 532-anti-loosening nut, 54-compression spring, 55- Annular extruded sheet, 56-rubber sealing ring, 57-shaft sealing retaining ring, 58-O type sealing ring.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific embodiments.

Please refer to Figures 1-5, the utility model provides a technical solution: a hydraulic drive joint, including a transmission shaft 1, a docking seat 2, a connecting shell 3, a fixing seat 4 and a sealing assembly 5, and the left end of the connecting shell 3 is installed There is a fixed seat 4, a docking seat 2 is installed on the right end of the connecting shell 3, a sealing assembly 5 is arranged symmetrically on the left and right ends of the connecting shell 3, and a transmission shaft 1 is arranged inside the docking seat 2.

The sealing assembly 5 includes a blocking cover 51, a mechanical seal 52, a fixed screw 53, a compression spring 54, an annular extrusion piece 55, a rubber sealing ring 56, a shaft sealing retaining ring 57 and an O-ring 58, and the left and right end faces of the connecting shell 3 are symmetrical. An O-shaped sealing ring 58 is embedded, and a rubber sealing ring 56 is arranged symmetrically on the left and right ends of the connecting shell 3. The left end surface of the rubber sealing ring 56 is attached with an annular extrusion piece 55, and the left end surface of the annular extrusion piece 55 is clamped with a compression spring 54. , the left end surface of the docking seat 2 is embedded with a shaft sealing retaining ring 57, the upper and lower sides and the front and rear sides of the docking seat 2 are symmetrically interspersed with fixed screws 53, and the right end surface of the docking seat 2 is embedded with a blocking cover 51, and the blocking cover 51 A mechanical seal 52 is bonded to the left end surface, and this design solves the problem of poor sealing at the joints of the original driving joints.

Two sets of O-rings 58 are embedded, and the specifications of the two sets of O-rings 58 are the same. There are two sets of rubber sealing rings 56, and the specifications of the two sets of rubber sealing rings 56 are the same. Made of rubber, two sets of O-shaped sealing rings 58 make the sealing between the connecting shell 3 and the fixed seat 4 and the docking seat 2 better, and two sets of rubber sealing rings 56 made of EPDM rubber further improve the connection Sealing between the shell 3 and the fixed seat 4 and the docking seat 2. There are two sets of annular extrusion pieces 55, and the specifications of the two sets of annular extrusion pieces 55 are the same. There are multiple compression springs 54, and multiple compression springs 54 are installed. The springs 54 have the same specifications, the right side of the fixed seat 4 and the left side of the docking seat 2 are provided with annular grooves, and the annular grooves are matched with the annular extrusion pieces 55, and a plurality of compression springs 54 will press against the two sets of annular extrusion pieces 55. Extrusion force is applied so that two sets of annular extrusion pieces 55 can squeeze two sets of rubber sealing rings 56, thereby improving the sealing ability of the rubber sealing rings 56, and the annular groove facilitates the butt joint of the annular extrusion pieces 55 on the fixed seat 4 or Seat 2 moves left and right inside.

The right side of the upper end surface of the transmission shaft 1 is provided with a positioning keyway 11, the left side of the annular side of the transmission shaft 1 is provided with a rotating blade 12, and the rotating blade 12 is connected with the transmission shaft 1 by welding, and the left side of the annular side of the transmission shaft 1 is provided with a follower plate 13, and the follower plate 13 is connected to the transmission shaft 1 by welding, the positioning keyway 11 is convenient for the external positioning key to be embedded in the upper end surface of the drive shaft 1, the rotating blade 12 is convenient to drive the drive shaft 1 to rotate, and the follower plate 13 avoids the transmission Shaft 1 is displaced from side to side during use, and oil nozzles 31 are arranged symmetrically on both sides of the upper end of the connecting shell 3, and there is an annular oil chamber inside the connecting shell 3, and the annular oil chamber matches the rotating blade 12, and the oil nozzle 31 and the annular The oil chambers are connected, and the oil nozzle 31 is convenient for external hydraulic fluid to enter the annular oil chamber.

The left side of the ring side of the fixing seat 4 is welded with a first mounting flange 41, and the right side of the ring side of the docking seat 2 is welded with a second mounting flange 21. The first mounting flange 41 is convenient for installing and fixing the fixing seat 4. And the second mounting flange 21 is convenient to install and fix the docking seat 2, and there are four fixed screw rods 53 interspersed, and the four fixed screw rods 53 have the same specifications, and the right ends of the four fixed screw rods 53 are all provided with inner hexagonal caps 531. The left side of the ring side of the fixing screw 53 is engaged with anti-loosening nuts 532. The four fixing screws 53 are convenient for splicing and fixing the fixing seat 4, the connecting shell 3 and the docking seat 2. The fixing screw 53 rotates, and the anti-loosening nut 532 facilitates fixing the fixing screw 53 .

As the first embodiment of the present utility model: first, the fixed base 4 is installed on one side of the fixed arm in the external industrial robot by means of the first mounting flange 41, and then the outer end of the drive shaft 1 is connected with the movable arm in the external industrial robot , and then the external hydraulic station is connected to the oil nozzle 31 through a high-pressure hose, so that the hydraulic oil enters the annular oil chamber inside the connection shell 3. When the hydraulic oil pushes the rotating blade 12 forward or reverse, the transmission shaft 1 They will rotate clockwise or counterclockwise together, so as to realize the flexible movement of the mechanical arm in the external industrial robot.

As the second embodiment of the utility model: during the use of the device, two sets of O-shaped sealing rings 58 make the sealing between the connection shell 3 and the fixed seat 4 and the docking seat 2 better, and the two sets of rubber sealing rings 56 further improves the sealing between the connection shell 3 and the fixed seat 4 and the docking seat 2, and a plurality of compression springs 54 will exert a pressing force on the two sets of annular extrusion pieces 55, so that the two sets of annular extrusion pieces 55 are Two sets of rubber sealing rings 56 are squeezed to improve the sealing ability of the rubber sealing rings 56, so as to avoid leakage at the connection between the connecting shell 3 and the fixed seat 4 and the docking seat 2; by inserting the mechanical seal 52, the transmission The seal between the shaft 1 and the docking seat 2 is better, and the seal between the follower plate 13 and the docking seat 2 is better when the shaft uses a sealing retaining ring 57. 3 and the docking seat 2 are connected and fixed, so that the integration of the fixing seat 4, the connection shell 3 and the docking seat 2 is better.

The basic principles and main features of the utility model and the advantages of the utility model have been shown and described above. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the utility model The present utility model can be realized in other specific forms without the spirit or essential features. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. The utility model provides a hydraulic drive joint, includes transmission shaft, butt joint seat, coupling housing, fixing base and seal assembly, its characterized in that: the left end face of the connecting shell is provided with a fixed seat, the right end face of the connecting shell is provided with a butt joint seat, the left end face and the right end face of the connecting shell are symmetrically provided with sealing assemblies, and a transmission shaft is arranged in the butt joint seat;

the sealing assembly comprises a blocking cover, a mechanical seal, a fixing screw, a compression spring, annular extrusion sheets, rubber sealing rings, shaft sealing check rings and O-shaped sealing rings, wherein the O-shaped sealing rings are symmetrically embedded in the left end face and the right end face of the connecting shell, the rubber sealing rings are symmetrically arranged on the left end face and the right end face of the connecting shell, the annular extrusion sheets are attached to the left end face of the rubber sealing rings, the compression spring is clamped on the left end face of the annular extrusion sheets, the shaft sealing check rings are embedded in the left end face of the butt joint seat, the fixing screw is symmetrically inserted in the upper side, the lower side, the front side and the rear side of the inside of the butt joint seat, the blocking cover is embedded in the right end face of the butt joint seat, and the blocking cover Zuo Duanmian is attached to the mechanical seal.

2. A hydraulically driven joint according to claim 1, characterized in that: the O-shaped sealing rings are embedded with two groups, the specifications of the two groups of O-shaped sealing rings are the same, the two groups of rubber sealing rings are arranged, the specifications of the two groups of rubber sealing rings are the same, and the rubber sealing rings are made of ethylene propylene diene monomer rubber.

3. A hydraulically driven joint according to claim 1, characterized in that: the annular extrusion piece laminating has two sets of, and two sets of annular extrusion piece specifications are the same, compression spring clamps have a plurality of, and a plurality of compression spring specifications are the same, the ring channel has all been seted up to inside right side of fixing base and the inside left side of butt joint seat, and ring channel and annular extrusion piece phase-match.

4. A hydraulically driven joint according to claim 1, characterized in that: the positioning key groove is formed in the right side of the upper end face of the transmission shaft, rotary blades are arranged on the left side of the annular side face of the transmission shaft and connected with the transmission shaft in a welding mode, and a follow-up disc is arranged on the left side of the annular side face of the transmission shaft and connected with the transmission shaft in a welding mode.

5. A hydraulically driven joint according to claim 1, characterized in that: the oil nozzle is symmetrically arranged on the front side and the rear side of the upper end surface of the connecting shell, an annular oil cavity is formed in the connecting shell and matched with the rotating blades, and the oil nozzle is communicated with the annular oil cavity.

6. A hydraulically driven joint according to claim 1, characterized in that: the left side of the annular side face of the fixing seat is welded with a first mounting flange plate, and the right side of the annular side face of the butt joint seat is welded with a second mounting flange plate.

7. A hydraulically driven joint according to claim 1, characterized in that: four fixing screws are inserted, the specifications of the four fixing screws are the same, the right ends of the four fixing screws are all provided with inner hexagonal caps, and the left sides of the annular sides of the four fixing screws are all meshed with anti-loosening nuts.

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