Electric cylinder

Abstract

The utility model discloses an electric cylinder. The electric cylinder comprises a shell, a driving assembly, a transmission assembly, a sealing assembly and a lead screw, the driving assembly, the transmission assembly and the sealing assembly are all arranged in the shell, one end of the lead screw is arranged in the shell, and the other end of the lead screw is arranged outside the shell; the driving assembly is fixedly connected with the shell, the transmission assembly comprises a rotating shaft and a nut, the nut is arranged in one end of the rotating shaft, the other end of the rotating shaft is connected with the rotor, one end of the lead screw penetrates into the rotating shaft and is connected with the nut, and the sealing assembly is arranged between the shell and the rotating shaft. The rotating shaft can be driven by the driving assembly to rotate so as to drive the nut to rotate, and therefore the nut drives the lead screw to move linearly. The electric cylinder is provided with lubricating oil ways, the lubricating oil ways comprise lead screw lubricating oil ways, the shell, the sealing assembly, the rotating shaft and the nut form the lead screw lubricating oil ways which are sequentially communicated in a sealed mode, and the lead screw lubricating oil ways are communicated to the lead screw.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric cylinder technical field, especially electric cylinder. BACKGROUND

[0002] Electric cylinder is the modular product of cooperation design of motor and screw rod, can convert the rotation of motor into the linear motion of screw rod. In the existing electric cylinder, the lubrication effect of screw rod is poor, the oil circuit design has the defect, and the electric cylinder is difficult to lubricate in real time when working. SUMMARY

[0003] The utility model discloses an electric cylinder to solve at least one technical problem existing above.

[0004] The utility model discloses an electric cylinder to solve at least one technical problem existing above.

[0005] The driving assembly is fixedly connected with the shell, the transmission assembly includes a rotating shaft and a nut, the nut is arranged in one end of the rotating shaft, the other end of the rotating shaft is connected with the rotor, one end of the screw rod penetrates into the rotating shaft and is connected with the nut, and the sealing assembly is arranged between the shell and the rotating shaft.

[0006] The rotating shaft can rotate under the driving of the driving assembly to drive the nut to rotate, so that the nut drives the screw rod to move linearly.

[0007] The electric cylinder has a lubricating oil circuit, the lubricating oil circuit includes a screw rod lubricating oil circuit, the screw rod lubricating oil circuit is arranged in the shell, the shell, the sealing assembly, the rotating shaft and the nut form the screw rod lubricating oil circuit in sealed communication, and the screw rod lubricating oil circuit is connected to the screw rod.

[0008] In the above electric cylinder, the driving assembly can drive the rotating shaft to rotate, the rotating shaft drives the nut to rotate, so that the nut drives the screw rod to move linearly, and at the same time of working of the electric cylinder, the screw rod lubricating oil circuit is connected to the screw rod, so that the lubricating oil in the screw rod lubricating oil circuit can flow to the screw rod, and the lubrication effect of the screw rod during movement can be improved.

[0009] In some embodiments, the sealing assembly includes two sealing bearings, the two sealing bearings are sleeved on the rotating shaft and abut against the shell, the two sealing bearings, the shell and the rotating shaft surround an annular space, and the shell, the annular space, the rotating shaft and the nut are sequentially sealed and communicated to form the screw rod lubricating oil circuit.

[0010] In some embodiments, the sealing assembly further comprises an inner spacer and an outer spacer, the outer spacer abutting the outer rings of the two sealing bearings, the inner spacer abutting the inner rings of the two sealing bearings, the outer spacer and the housing enclosing a first annular space, the outer spacer, the inner spacer and the two sealing bearings enclosing a second annular space, the inner spacer and the rotating shaft enclosing a third annular space; the housing, the first annular space, the outer spacer, the second annular space, the inner spacer, the third annular space, the rotating shaft and the nut are sequentially sealed and communicated to form the lead screw lubricating oil path; and / or,

[0011] The two sealing bearings and the nut are located at the same end of the rotating shaft and are arranged correspondingly.

[0012] In some embodiments, the sealing assembly comprises a retainer ring and two sealing rings, the retainer ring being sleeved on the rotating shaft and abutting the housing, the two sealing rings being arranged between the rotating shaft and the retainer ring and located at both ends of the retainer ring, a first annular cavity being enclosed between the retainer ring and the housing, a second annular cavity being enclosed by the retainer ring, the two sealing rings and the rotating shaft; the housing, the first annular cavity, the retainer ring, the second annular cavity, the rotating shaft and the nut are sequentially sealed and communicated to form the lead screw lubricating oil path.

[0013] In some embodiments, the circumferential side wall of the retainer ring is provided with a relief hole, one end of a shaft key is fixedly connected with the rotating shaft, the other end of the shaft key is arranged correspondingly to the relief hole, and the first annular cavity communicates with the second annular cavity through the relief hole; and / or,

[0014] The retainer ring and the nut are located at the same end of the rotating shaft and are arranged correspondingly.

[0015] In some embodiments, the electric cylinder comprises a guide rail assembly and a sliding connection plate, the guide rail assembly comprises an adapter plate, a sliding rail and a sliding block, the adapter plate is arranged between the housing and the sliding rail, the sliding rail is arranged between the adapter plate and the sliding block, the sliding block is slidably arranged with the sliding rail, and the sliding connection plate connects the lead screw and the sliding block.

[0016] In some embodiments, the lubricating oil path comprises a guide rail lubricating oil path, one end of the guide rail lubricating oil path communicates with the lead screw lubricating oil path, and the other end of the guide rail lubricating oil path communicates to the sliding block.

[0017] In some embodiments, the housing, the adapter plate and the sliding rail are sequentially sealed and communicated to form the guide rail lubricating oil path; or,

[0018] The electric cylinder comprises an oil injection sealing cover connected to the outer side of the shell and arranged between the shell and the sliding block, and the shell, the oil injection sealing cover and the sliding rail are sequentially sealed and communicated to form the guide rail lubricating oil path.

[0019] In some embodiments, the sliding connecting plate comprises a top plate and a side plate, the top plate is connected to one end of the side plate, the screw rod is connected to the top plate at one end outside the shell, and the side plate is connected to one side of the sliding block away from the adapter plate.

[0020] In some embodiments, the electric cylinder further comprises an organ case, one end of the organ case is connected to the shell, the other end of the organ case is connected to the top plate, the organ case is sleeved on the one end of the screw rod outside the shell, and the organ case is connected to the shell and the top plate to enclose the one end of the screw rod in the organ case; and / or,

[0021] The electric cylinder further comprises an organ case, the organ case is arranged on the side of the adapter plate and connected to the sliding connecting plate, the side plate has a receiving groove, and the organ case is connected to the adapter plate and the sliding connecting plate to enclose the sliding rail and the sliding block in the receiving groove; and / or,

[0022] The top plate and the side plate are connected by a connecting piece.

[0023] Additional aspects and advantages of the present application will be made apparent from the following description of embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of embodiments, taken in conjunction with the accompanying drawings of which:

[0025] Figure 1 is a structural schematic diagram of an electric cylinder of an embodiment of the present application;

[0026] Figure 2 is a top view of the electric cylinder of the embodiment of the present application;

[0027] Figure 3 is Figure 2 is a sectional view of section line A-A in FIG. 1;

[0028] Figure 4 is Figure 3 is an enlarged view of portion F in FIG. 1;

[0029] Figure 5 is Figure 2 is a sectional view of section line B-B in FIG. 1;

[0030] Figure 6 is another structure diagram of the electric cylinder of the embodiment of the utility model;

[0031] Figure 7 is another plan view of the electric cylinder of the embodiment of the utility model;

[0032] Figure 8 is Figure 7 the section view of section line C-C in figure 1;

[0033] Figure 9 show Figure 8 the enlarged view of G part in figure 1;

[0034] Figure 10 is Figure 7 the section view of section line D-D in figure 1;

[0035] Figure 11 is Figure 10 the enlarged view of H part in figure 1;

[0036] Figure 12 is Figure 7 the section view of section line E-E in figure 1;

[0037] Figure 13 is the partial structure diagram of the electric cylinder of the embodiment of the utility model.

[0038] Reference signs:

[0039] 100, electric cylinder; 10, shell; 12, drive assembly; 14, transmission assembly; 16, sealing assembly; 18, oil nozzle; 20, screw rod; 22, lubricating oil path; 24, mover; 26, stator; 28, rotating shaft; 30, nut; 32, screw rod lubricating oil path; 34, first containing space; 36, second containing space; 38, fixing piece; 40, limiting piece; 41, limiting part; 42, sealing bearing; 44, inner spacer sleeve; 46, outer spacer sleeve; 47, annular space; 48, first annular space; 50, second annular space; 52, third annular space; 54, check ring; 56, sealing ring; 58, first annular cavity; 60, second annular cavity; 62, sealing groove; 64, guide rail assembly; 66, sliding connection plate; 68, adapter plate; 70, slide rail; 72, sliding block; 74, sliding groove; 76, guide rail lubricating oil path; 78, oil injection sealing cover; 80, first oil hole; 81, second oil hole; 82, third oil hole; 83, fourth oil hole; 84, oil inlet hole; 85, fifth oil hole; 86, sixth oil hole; 87, first oil passage hole; 88, second oil passage hole; 89, third oil passage hole; 90, fourth oil passage hole; 91, avoiding hole; 92, shaft key; 93, key groove; 94, connecting piece; 95, top plate; 96, side plate; 97, organ cover; 98, organ shell; 99, containing groove. DETAILED DESCRIPTION

[0040] The embodiments of the present application will be described in detail below with reference to the drawings, examples of which are shown in the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below with reference to the drawings are exemplary and are for the purpose of explaining the present application only, and should not be understood as limiting the present application.

[0041] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0042] In the description of the present application, it should be noted that, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. It can be mechanically connected, or it can be electrically connected. It can be directly connected, or it can be indirectly connected through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise specifically defined and limited, the first feature "above" or "below" the second feature can include the first and second features in direct contact, or the first and second features not in direct contact but in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] The disclosures herein provide many different embodiments or examples for implementing different structures of the present application. For simplicity of the present application, the elements and settings of a particular example are described herein. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0045] Please refer to Figures 1 to 5 The electric cylinder 100 of the present application includes a housing 10, a driving assembly 12, a transmission assembly 14, a sealing assembly 16 and a lead screw 20. The driving assembly 12, the transmission assembly 14 and the sealing assembly 16 are arranged in the housing 10. One end of the lead screw 20 is arranged in the housing 10, and the other end of the lead screw 20 is arranged outside the housing 10. The driving assembly 12 is fixedly connected with the housing 10. The transmission assembly 14 includes a rotating shaft 28 and a nut 30. The nut 30 is arranged in one end of the rotating shaft 28. The other end of the rotating shaft 28 is connected with a rotor 24. One end of the lead screw 20 penetrates into the rotating shaft 28 and is connected with the nut 30. The sealing assembly 16 is arranged between the housing 10 and the rotating shaft 28. The rotating shaft 28 can rotate under the driving of the driving assembly 12 to drive the nut 30 to rotate, so that the nut 30 drives the lead screw 20 to move linearly. The electric cylinder 100 has a lubricating oil passage 22, which includes a lead screw lubricating oil passage 32. The lead screw lubricating oil passage 32 is arranged in the housing 10. The housing 10, the sealing assembly 16, the rotating shaft 28 and the nut 30 form the lead screw lubricating oil passage 32 in sequence. The lead screw lubricating oil passage 32 is connected to the lead screw 20, so that the oil can flow to the lead screw 20 through the housing 10, the sealing assembly 16, the rotating shaft 28 and the nut 30 in sequence.

[0046] In the above electric cylinder 100, the driving assembly 12 can drive the rotating shaft 28 to rotate, so that the rotating shaft 28 drives the nut 30 to rotate, and the nut 30 drives the lead screw 20 to move linearly. At the same time of the operation of the electric cylinder 100, the lead screw lubricating oil passage 32 is connected to the lead screw 20, so that the lubricating oil in the lead screw lubricating oil passage 32 can flow to the lead screw 20, which can improve the lubricating effect when the lead screw 20 moves.

[0047] Specifically, the electric cylinder 100 further includes a circuit board (not shown in the figure) and other circuit components (not shown in the figure) to control the operation of the driving assembly 12. The electric cylinder 100 further includes an oil nozzle 18 for introducing lubricating oil. The housing 10 can be in the shape of a rectangular parallelepiped. The driving assembly 12 is arranged close to the middle part of the housing 10. The oil nozzle 18 is arranged on the outer side of the housing 10 and can communicate with the inside of the housing 10.

[0048] The driving assembly 12 can be an electric motor, which includes a rotor 24 and a stator 26 fixedly connected to the housing 10, and the stator 26 is spaced apart from the rotor 24. The stator 26 can be fixedly connected to the inner side wall of the housing 10, and the stator 26 is spaced apart from the rotor 24. The stator 26 can drive the rotor 24 to rotate by magnetic field action. The rotating shaft 28 can extend along the length direction L of the electric cylinder 100. In the embodiment, the middle part of the rotating shaft 28 is hollow, and the first accommodating space 34 and the second accommodating space 36 can be formed in the rotating shaft 28. The first accommodating space 34 is communicated with the second accommodating space 36, and the first accommodating space 34 and the second accommodating space 36 are respectively close to the two ends of the rotating shaft 28. The nut 30 is arranged in the first accommodating space 34. One end of the lead screw 20 can be located outside the housing 10, and the other end can penetrate into the rotating shaft 28 and be threadedly connected with the nut 30 in the rotating shaft 28. The oil nozzle 18 is communicated with the inside of the housing 10. The housing 10, the sealing assembly 16, the rotating shaft 28 and the nut 30 form a lead screw lubricating oil path 32 which is sealed and communicated in sequence. The oil nozzle 18 is mounted on the housing 10 and communicated with the lead screw lubricating oil path 32. The lead screw lubricating oil path 32 can be arranged in the side wall of the housing 10 and in the housing 10. Figure 3 In the embodiment, the stator 26 can drive the rotor 24 to rotate, the rotor 24 can drive the rotating shaft 28 to rotate, and the rotating shaft 28 can drive the nut 30 to rotate, so that the nut 30 can drive the lead screw 20 to move linearly along the length direction L of the electric cylinder 100. When the electric cylinder 100 is working, the oil nozzle 18 is communicated with the lead screw lubricating oil path 32, and lubricating oil can be introduced into the lead screw lubricating oil path 32 through the oil nozzle 18. The lubricating oil is communicated to the lead screw 20 in sequence through the housing 10, the sealing assembly 16, the rotating shaft 28 and the nut 30, so that the lubricating oil can flow to the lead screw 20, and the lubrication effect of the lead screw 20 during movement can be improved.

[0049] In one embodiment, the stator 26 can drive the rotor 24 to rotate, the rotor 24 can drive the rotating shaft 28 to rotate, and the rotating shaft 28 can drive the nut 30 to rotate, so that the nut 30 can drive the lead screw 20 to move linearly along the length direction L of the electric cylinder 100. When the electric cylinder 100 is working, the oil nozzle 18 is communicated with the lead screw lubricating oil path 32, and lubricating oil can be introduced into the lead screw lubricating oil path 32 through the oil nozzle 18. The lubricating oil is communicated to the lead screw 20 in sequence through the housing 10, the sealing assembly 16, the rotating shaft 28 and the nut 30, so that the lubricating oil can flow to the lead screw 20, and the lubrication effect of the lead screw 20 during movement can be improved.

[0050] In one embodiment, the stator 26 can drive the rotor 24 to rotate, the rotor 24 can drive the rotating shaft 28 to rotate, and the rotating shaft 28 can drive the nut 30 to rotate, so that the nut 30 can drive the lead screw 20 to move linearly along the length direction L of the electric cylinder 100. When the electric cylinder 100 is working, the oil nozzle 18 is communicated with the lead screw lubricating oil path 32, and lubricating oil can be introduced into the lead screw lubricating oil path 32 through the oil nozzle 18. The lubricating oil is communicated to the lead screw 20 in sequence through the housing 10, the sealing assembly 16, the rotating shaft 28 and the nut 30, so that the lubricating oil can flow to the lead screw 20, and the lubrication effect of the lead screw 20 during movement can be improved.

[0051] In one embodiment, the stator 26 can drive the rotor 24 to rotate, the rotor 24 can drive the rotating shaft 28 to rotate, and the rotating shaft 28 can drive the nut 30 to rotate, so that the nut 30 can drive the lead screw 20 to move linearly along the length direction L of the electric cylinder 100. When the electric cylinder 100 is working, the oil nozzle 18 is communicated with the lead screw lubricating oil path 32, and lubricating oil can be introduced into the lead screw lubricating oil path 32 through the oil nozzle 18. The lubricating oil is communicated to the lead screw 20 in sequence through the housing 10, the sealing assembly 16, the rotating shaft 28 and the nut 30, so that the lubricating oil can flow to the lead screw 20, and the lubrication effect of the lead screw 20 during movement can be improved. Figure 3 Figure 8

[0052] Optionally, in Figure 5 and Figure 8 ​​In some embodiments, the electric cylinder 100 comprises a fixing member 38 and a limiting member 40. The fixing member 38 is installed at one end of the nut 30 in the rotating shaft 28, and can fix the nut 30 in the rotating shaft 28. The limiting member 40 is connected to one end of the screw rod 20 in the rotating shaft 28, and can limit the one end of the screw rod 20 in the rotating shaft 28 from moving out of the first accommodating space 34. The end of the rotating shaft 28 away from the nut 30 has a limiting portion 41, which can limit the one end of the screw rod 20 in the rotating shaft 28 from moving out of the second accommodating space 36.

[0053] Please refer to Figures 1 to 3 In some embodiments, the sealing assembly 16 comprises two sealing bearings 42, which are sleeved on the rotating shaft 28 and abut against the housing 10. The two sealing bearings 42, the housing 10 and the rotating shaft 28 surround an annular space 47, and the housing 10, the annular space 47, the rotating shaft 28 and the nut 30 are sequentially and sealingly communicated to form the screw rod lubricating oil passage 32.

[0054] In this way, the lubricating oil can flow to the screw rod 20 through the screw rod lubricating oil passage 32 to lubricate the screw rod 20, i.e., the lubricating oil can flow to the screw rod 20 through the housing 10, the annular space 47, the rotating shaft 28 and the nut 30 in sequence to lubricate the screw rod 20.

[0055] Specifically, in Figure 3 In some embodiments, the two sealing bearings 42 are spaced apart and sleeved on the rotating shaft 28 and located on the outer side wall of the first accommodating space 34. The two sealing bearings 42 also abut against the inner side wall of the housing 10, and the nut 30 is connected to the inner side wall of the first accommodating space 34. In one embodiment, the screw rod lubricating oil passage 32 is formed by the housing 10, the annular space 47, the rotating shaft 28 and the nut 30 being sequentially and sealingly communicated. The lubricating oil can flow to the screw rod 20 through the screw rod lubricating oil passage 32 to lubricate the screw rod 20, i.e., the lubricating oil can flow to the screw rod 20 through the housing 10, the annular space 47, the rotating shaft 28 and the nut 30 in sequence to lubricate the screw rod 20.

[0056] Please refer to Figures 1 to 3 In some embodiments, the sealing assembly 16 further comprises an inner spacer sleeve 44 and an outer spacer sleeve 46. The outer spacer sleeve 46 abuts against the outer ring of the two sealing bearings 42, and the inner spacer sleeve 44 abuts against the inner ring of the two sealing bearings 42. The outer spacer sleeve 46 and the housing 10 surround a first annular space 48, the outer spacer sleeve 46, the inner spacer sleeve 44 and the two sealing bearings 42 surround a second annular space 50, and the inner spacer sleeve 44 and the rotating shaft 28 surround a third annular space 52. The housing 10, the first annular space 48, the outer spacer sleeve 46, the second annular space 50, the inner spacer sleeve 44, the third annular space 52, the rotating shaft 28 and the nut 30 are sequentially and sealingly communicated to form the screw rod lubricating oil passage 32.

[0057] In this way, the lubricating oil can flow to the lead screw 20 through the lead screw lubricating oil path 32 to lubricate the lead screw 20, i.e., the lubricating oil can flow to the lead screw 20 through the housing 10, the first annular space 48, the outer spacer sleeve 46, the second annular space 50, the inner spacer sleeve 44, the third annular space 52, the shaft 28, and the nut 30 in sequence to lubricate the lead screw 20.

[0058] Specifically, the outer spacer sleeve 46 and the inner spacer sleeve 44 can be in a cylindrical shape, and the outer spacer sleeve 46 and the inner spacer sleeve 44 are arranged between the two sealing bearings 42, the outer spacer sleeve 46 abuts against the outer rings of the two sealing bearings 42, and the inner spacer sleeve 44 abuts against the inner rings of the two sealing bearings 42. The annular space 47 includes the first annular space 48, the second annular space 50, and the third annular space 52.

[0059] In one embodiment, the oil nozzle 18 communicates with the first annular space 48, the first annular space 48 communicates with the second annular space 50, the second annular space 50 communicates with the third annular space 52, the third annular space 52 communicates with the first accommodating space 34, and the first accommodating space 34 communicates with the connecting part of the lead screw 20 passing through the nut 30, so that the lubricating oil entering from the oil nozzle 18 can flow to the lead screw 20 to lubricate the lead screw 20.

[0060] Please refer to Figure 3 The two sealing bearings 42 and the nut 30 are located at the same end of the shaft 28 and are arranged correspondingly, so that the lubricating oil can flow through the sealed space formed by the two sealing bearings 42, the housing 10, and the shaft 28 to the nut 30, and then flow to the lead screw 20 through the nut 30.

[0061] Please refer to Figures 6 to 8 In some embodiments, the sealing assembly 16 includes a retainer ring 54 and two sealing rings 56, the retainer ring 54 is sleeved on the shaft 28 and abuts against the housing 10, and the retainer ring 54 and the nut 30 are arranged correspondingly on the outer side and the inner side of the shaft 28, respectively; the two sealing rings 56 are arranged between the shaft 28 and the retainer ring 54 and are located at the two ends of the retainer ring 54; the first annular cavity 58 is formed between the retainer ring 54 and the housing 10, and the second annular cavity 60 is formed by the retainer ring 54, the two sealing rings 56, and the shaft 28; the housing 10, the first annular cavity 58, the retainer ring 54, the second annular cavity 60, the shaft 28, and the nut 30 are in sealed communication with each other to form the lead screw lubricating oil path 32.

[0062] In this way, the lubricating oil can flow to the lead screw 20 through the housing 10, the first annular cavity 58, the retainer ring 54, the second annular cavity 60, the shaft 28, and the nut 30 in sequence to lubricate the lead screw 20.

[0063] Specifically, in Figure 8In some embodiments, the blocking ring 54 is sleeved on the rotating shaft 28 and located on the outer side of the first accommodating space 34, and the blocking ring 54 abuts against the inner side wall of the shell 10, and the nut 30 is connected to the inner side of the first accommodating space 34. Two sealing grooves 62 can be formed on the side of the blocking ring 54 facing the rotating shaft 28, and the two sealing grooves 62 are arranged around the rotating shaft 28, and two sealing rings 56 are arranged in the sealing grooves 62 and abut against the rotating shaft 28.

[0064] In one embodiment, the oil nozzle 18 is communicated with the first annular cavity 58, the first annular cavity 58 is communicated with the second annular cavity 60, the second annular cavity 60 is communicated with the first accommodating space 34, and the first accommodating space 34 is communicated with the connecting position of the lead screw 20 penetrating the nut 30, so that the lubricating oil entering from the oil nozzle 18 can flow to the lead screw 20, thereby lubricating the lead screw 20.

[0065] Please refer to Figures 1 to 3 and Figure 13 In some embodiments, the electric cylinder 100 comprises a guide rail assembly 64 and a sliding connection plate 66, the guide rail assembly 64 comprises an adapter plate 68, a sliding rail 70 and a sliding block 72, the adapter plate 68 is arranged between the shell 10 and the sliding rail 70, the sliding rail 70 is arranged between the adapter plate 68 and the sliding block 72, the sliding block 72 is slidably arranged with the sliding rail 70, and the sliding connection plate 66 connects the lead screw 20 and the sliding block 72.

[0066] In this way, the guide rail assembly 64 and the sliding connection plate 66 can provide a guide function for the lead screw 20, and can also make the lead screw 20 move stably along the length direction L of the electric cylinder 100.

[0067] Specifically, in Figure 13 the adapter plate 68 is connected to the outer side of the shell 10, and the sliding rail 70 is connected to the side of the adapter plate 68 away from the shell 10. The sliding rail 70 is provided with a sliding groove 74 on the side away from the adapter plate 68, and part of the sliding block 72 is arranged in the sliding groove 74, so that the sliding block 72 can slide relative to the sliding rail 70 through the sliding groove 74.

[0068] In one embodiment, one end of the lead screw 20 located outside the shell 10 can be connected to one side of the sliding connection plate 66, and the sliding block 72 can be connected to the other side of the sliding connection plate 66. During the linear movement of the lead screw 20 driven by the nut 30, the guide rail assembly 64 and the sliding connection plate 66 can provide a guide function for the lead screw 20, and can also make the lead screw 20 move stably along the length direction L of the electric cylinder 100.

[0069] Please refer to Figure 3 and Figure 8 In some embodiments, the lubricating oil path 22 comprises a guide rail lubricating oil path 76, one end of the guide rail lubricating oil path 76 is communicated with the lead screw lubricating oil path 32, and the other end of the guide rail lubricating oil path 76 is communicated with the sliding block 72.

[0070] In this way, the lubricating oil can be introduced into the slide rail 70, so that the lubricating oil flows from the slide rail 70 to the sliding block 72, thereby improving the lubrication effect when the sliding block 72 slides.

[0071] Specifically, the guide rail lubricating oil passage 76 can be arranged in the side wall of the housing 10 and outside the housing 10. In one embodiment, the oil nozzle 18 can introduce the lubricating oil into the screw lubricating oil passage 32, the guide rail lubricating oil passage 76 is communicated with the screw lubricating oil passage 32, the lubricating oil can flow to the guide rail lubricating oil passage 76, the guide rail lubricating oil passage 76 is communicated with the sliding block 72, and finally the lubricating oil can flow to the sliding block 72, thereby improving the lubrication effect when the sliding block 72 slides.

[0072] It should be noted that after the guide rail lubricating oil passage 76 is communicated to the slide rail 70, it can be communicated to the sliding groove 74 inside the slide rail 70, so that the sliding groove 74 is filled with lubricating oil, thereby allowing the lubricating oil to flow to the sliding block 72, thereby facilitating the sliding of the sliding block 72 in the sliding groove 74.

[0073] Please refer to Figure 3 and Figure 8 In some embodiments, the housing 10, the adapter plate 68, and the slide rail 70 are sequentially sealed and communicated to form the guide rail lubricating oil passage 76.

[0074] In this way, the guide rail lubricating oil passage 76 can be formed in various ways to improve the practicability.

[0075] Specifically, the housing 10 can be provided with a first oil hole 80 and a second oil hole 81, the first oil hole 80 is arranged on the inner side wall of the housing 10, the second oil hole 81 is arranged on the outer side wall of the housing 10, and the first oil hole 80 is communicated with the second oil hole 81 and the first annular space 48.

[0076] In combination with Figure 3 and Figure 4 The side of the adapter plate 68 facing the housing 10 can be provided with a third oil hole 82, and the side of the adapter plate 68 connected with the slide rail 70 along the L direction can be provided with a fourth oil hole 83. The side of the slide rail 70 connected with the adapter plate 68 along the L direction can be provided with an oil inlet hole 84. The second oil hole 81 is communicated with the third oil hole 82, the third oil hole 82 is communicated with the fourth oil hole 83, and the fourth oil hole 83 is communicated with the oil inlet hole 84. In one embodiment, the lubricating oil in the first annular space 48 can flow out of the housing 10 through the first oil hole 80 and the second oil hole 81, then flow into the adapter plate 68 through the third oil hole 82, then flow out of the adapter plate 68 through the fourth oil hole 83, and finally flow into the slide rail 70 through the oil inlet hole 84, thereby lubricating the slide rail 70.

[0077] In some embodiments, the electric cylinder 100 comprises an oil injection sealing cover 78 connected to the outer side of the housing 10 and arranged between the housing 10 and the sliding block 72, the housing 10, the oil injection sealing cover 78 and the sliding rail 70 are sequentially sealed and communicated to form the guide rail lubricating oil path 76.

[0078] Specifically, in combination with Figures 8 to 11 , the side of the sealing oil injection cover facing the housing 10 can be provided with a fifth oil hole 85, and the side of the sealing oil injection cover connected to the sliding rail 70 along the L direction can be provided with a sixth oil hole 86. The side of the sliding rail 70 connected to the sealing oil injection cover along the L direction is provided with an oil inlet hole 84. The second oil hole 81 is communicated with the fifth oil hole 85, the fifth oil hole 85 is communicated with the sixth oil hole 86, and the sixth oil hole 86 is communicated with the oil inlet hole 84. In an embodiment, the lubricating oil in the first annular space 48 can flow out of the housing 10 through the first oil hole 80 and the second oil hole 81, then flow into the sealing oil injection cover through the fifth oil hole 85, then flow out of the sealing oil injection cover through the sixth oil hole 86, and finally flow into the sliding rail 70 through the oil inlet hole 84, thereby lubricating the sliding rail 70.

[0079] Please refer to Figures 3 to 5 In some embodiments, the circumferential side wall of the outer spacer sleeve 46 and the inner spacer sleeve 44 is provided with a plurality of first oil holes 87, the first annular space 48 is communicated with the second annular space 50 through the first oil holes 87, and the second annular space 50 is communicated with the third annular space 52 through the first oil holes 87.

[0080] In this way, the first annular space 48, the second annular space 50 and the third annular space 52 are communicated with each other through the first oil holes 87 in the lead screw lubricating oil path 32.

[0081] Specifically, in the embodiment shown in Figure 3 , the side wall of the shaft 28 is provided with a third oil hole 89, and the nut 30 is provided with a fourth oil hole 90 corresponding to the position of the third oil hole 89. The third annular space 52 is communicated with the third oil hole 89, the third oil hole 89 is communicated with the fourth oil hole 90, and the fourth oil hole 90 is communicated to the lead screw 20.

[0082] In an embodiment, the lubricating oil in the first annular space 48 can flow to the second annular space 50 through the first oil holes 87, then flow to the third annular space 52 through the first oil holes 87, and finally flow to the lead screw 20 through the third oil hole 89 and the fourth oil hole 90, thereby lubricating the lead screw 20.

[0083] In addition, in the embodiment shown in Figure 5 , the electric cylinder has a shaft key 92, and the outer side wall of the nut 30 can be provided with a key groove 93. After the nut 30 is put into the shaft 28, one end of the shaft key 92 can pass through the shaft 28 to be inserted into the key groove 93.

[0084] Please refer to Figures 8 to 12 In some embodiments, the circumferential side wall of the retaining ring 54 is provided with an avoiding hole 91, one end of a shaft key 92 is fixedly connected with the rotating shaft 28, and the other end of the shaft key 92 is arranged corresponding to the avoiding hole 91. The first annular cavity 58 is communicated with the second annular cavity 60 through the avoiding hole 91.

[0085] In this way, the avoiding hole 91 can facilitate the installation of the shaft key 92 on the rotating shaft 28, and the lubricating oil in the first annular cavity 58 can flow into the second annular cavity 60 through the avoiding hole 91.

[0086] Specifically, in Figure 12 some embodiments, the outer side wall of the nut 30 can be provided with a key groove 93, and the opening of the key groove 93 can be arranged towards the avoiding hole 91. The avoiding hole 91 can be in the shape of a waist circle. After the nut 30 is put into the rotating shaft 28, the one end of the shaft key 92 can be inserted into the key groove 93 by being threaded through the rotating shaft 28 along the opening direction of the avoiding hole 91, and then the other end of the shaft key 92 located outside the rotating shaft 28 can be fixedly installed on the outer side wall of the rotating shaft 28.

[0087] The circumferential side wall of the retaining ring 54 is also provided with a plurality of second oil holes 88, and the first annular cavity 58 can also be communicated with the second annular cavity 60 through the second oil holes 88. In one example, the first annular cavity 58 is communicated with the second annular cavity 60 through the second oil holes 88. In one example, the first annular cavity 58 is communicated with the second annular cavity 60 through the avoiding hole 91. In one example, the first annular cavity 58 is communicated with the second annular cavity 60 through the second oil holes 88 and the avoiding hole 91.

[0088] In addition, in Figure 3 the embodiments shown, the side wall of the rotating shaft 28 is provided with a third oil hole 89, and the nut 30 is provided with a fourth oil hole 90 corresponding to the position of the third oil hole 89. The second annular cavity 60 is communicated with the third oil hole 89, the third oil hole 89 is communicated with the fourth oil hole 90, and the fourth oil hole 90 is communicated to the position of the lead screw 20.

[0089] Please refer to Figure 8 , the retaining ring 54 and the nut 30 are located at the same end of the rotating shaft 28 and are arranged correspondingly, which can facilitate the circulation of the lubricating oil through the sealed space formed by the retaining ring 54, the housing 10 and the rotating shaft 28 to the nut 30, and then to the lead screw 20 through the nut 30.

[0090] Please refer to Figure 3 and Figure 8 In some embodiments, the electric cylinder 100 includes a sliding connection plate 66, the sliding connection plate 66 includes a top plate 95 and a side plate 96, the top plate 95 is connected to one end of the side plate 96, the end of the lead screw 20 located outside the housing 10 is connected to the top plate 95, and the side plate 96 is connected to the side of the sliding block 72 away from the adapter plate 68.

[0091] In this way, the guiding effect on the lead screw 20 can be further enhanced by the sliding connection plate 66, and the sliding connection plate 66 can be connected to the top plate 95 and the side plate 96 to facilitate installation.

[0092] Specifically, in one embodiment, the side plate 96 is arranged perpendicularly to the top plate 95 along the L direction, the side plate 96 is connected to the side of the sliding block 72 away from the adapter plate 68, and the top plate 95 is connected to one end of the side plate 96. During the movement of the lead screw 20 along the L direction, the guiding effect on the lead screw 20 can be further enhanced by the sliding connection plate 66, and the sliding connection plate 66 can be connected to the top plate 95 and the side plate 96 to facilitate installation.

[0093] Please refer to Figure 3 and Figure 8 In some embodiments, the electric cylinder 100 further comprises an accordion cover 97, one end of the accordion cover 97 is connected to the housing 10, the other end of the accordion cover 97 is connected to the top plate 95, the accordion cover 97 is sleeved on the end of the lead screw 20 outside the housing 10, and the accordion cover 97 is connected to the housing 10 and the top plate 95 to enclose the end of the lead screw 20 outside the housing 10 in the accordion cover 97.

[0094] In this way, the lead screw 20 can be prevented from being contaminated by dust and other impurities.

[0095] Specifically, the accordion cover 97 can be similar to a corrugated tube, one end of the accordion cover 97 can be connected to the housing 10, the other end of the accordion cover 97 can be connected to the top plate 95, and the accordion cover 97 can be sleeved on the end of the lead screw 20 outside the housing 10. In one embodiment, the accordion cover 97 is connected to the housing 10 and the sliding connection plate 66 to enclose the end of the lead screw 20 outside the housing 10 in the accordion cover 97, so that the lead screw 20 can be prevented from being contaminated by dust and other impurities.

[0096] Please refer to Figure 3 and Figure 8 In some embodiments, the electric cylinder 100 further comprises an accordion shell 98, the accordion shell 98 is arranged on the side of the adapter plate 68 and connected to the sliding connection plate 66, the side plate 96 has a receiving groove 99, and the accordion shell 98 is connected to the adapter plate 68 and the sliding connection plate 66 to enclose the slide rail 70 and the sliding block 72 in the receiving groove 99.

[0097] In this way, the sliding block 72 and the slide rail 70 can be prevented from being contaminated by dust and other impurities.

[0098] Specifically, the accordion shell 98 can be similar to a corrugated tube. The accordion shell 98 can be provided with two, and the two accordion shells 98 can be arranged on the two sides of the adapter plate 68 along the L direction. The side of the side plate 96 facing the sliding block 72 can be provided with the receiving groove 99, and the sliding block 72 and the slide rail 70 can be arranged in the receiving groove 99.

[0099] In Figure 3In the shown embodiment, the accordion shell 98 can be coupled with the adapter plate 68, the top plate 95, and the side plates 96 to enclose the slide rails 70 and the slide blocks 72 in the accommodation slot 99. In Figure 8 In the shown embodiment, the accordion shell 98 can be coupled with the adapter plate 68, the side plates 96 to enclose the slide rails 70 and the slide blocks 72 in the accommodation slot 99.

[0100] In addition, in Figure 1 and Figure 6 The top plate 95 and the side plates 96 can be coupled by the coupling member 94, which includes a bolt or a screw.

[0101] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0102] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electric cylinder characterized by, The utility model provides a kind of electric cylinder, including shell, drive assembly, transmission assembly, sealing assembly and screw rod, the drive assembly, the transmission assembly, the sealing assembly are all arranged in the shell, one end of the screw rod is arranged in the shell, the other end of the screw rod is arranged outside the shell; The drive assembly is fixedly connected with the shell, the transmission assembly includes a shaft and a nut, the nut is arranged in one end of the shaft, the other end of the shaft is connected with the drive assembly, one end of the screw rod penetrates into the shaft and is connected with the nut, the sealing assembly is arranged between the shell and the shaft; The shaft can rotate under the drive of the drive assembly to drive the nut to rotate, so that the nut drives the screw rod to move linearly; The electric cylinder has a lubricating oil passage, the lubricating oil passage includes a screw rod lubricating oil passage, the shell, the sealing assembly, the shaft and the nut form the screw rod lubricating oil passage in sequence, and the screw rod lubricating oil passage is communicated to the screw rod.

2. The electric cylinder according to claim 1, characterized by The sealing assembly includes two sealing bearings, the two sealing bearings are sleeved on the shaft and abut against the shell;The two sealing bearings, the shell and the shaft surround an annular space, and the shell, the annular space, the shaft and the nut are sequentially and sealingly communicated to form the screw rod lubricating oil passage.

3. The electric cylinder according to claim 2, characterized by The sealing assembly further includes an inner spacer sleeve and an outer spacer sleeve, the outer spacer sleeve abuts against the outer rings of the two sealing bearings, the inner spacer sleeve abuts against the inner rings of the two sealing bearings, the outer spacer sleeve and the shell surround a first annular space, the outer spacer sleeve, the inner spacer sleeve and the two sealing bearings surround a second annular space, and the inner spacer sleeve and the shaft surround a third annular space;The shell, the first annular space, the outer spacer sleeve, the second annular space, the inner spacer sleeve, the third annular space, the shaft and the nut are sequentially and sealingly communicated to form the screw rod lubricating oil passage. The two sealing bearings and the nut are located at the same end of the shaft and are correspondingly arranged.

4. The electric cylinder according to claim 1, characterized by The sealing assembly includes a retainer ring and two sealing rings, the retainer ring is sleeved on the shaft and abuts against the shell, the two sealing rings are arranged between the shaft and the retainer ring and are located at both ends of the retainer ring, a first annular cavity is surrounded between the retainer ring and the shell, and a second annular cavity is surrounded by the retainer ring, the two sealing rings and the shaft. The shell, the first annular cavity, the retainer ring, the second annular cavity, the shaft and the nut are sequentially and sealingly communicated to form the screw rod lubricating oil passage.

5. The electric cylinder according to claim 4, characterized in that, The circumferential side wall of the retainer ring is provided with a relief hole, one end of a shaft key is fixedly connected with the shaft, and the other end of the shaft key is arranged corresponding to the relief hole, and the first annular cavity communicates with the second annular cavity through the relief hole. The retainer ring and the nut are located at the same end of the shaft and are correspondingly arranged. ​ 6. The electric cylinder according to claim 1, wherein The electric cylinder comprises a guide rail assembly and a sliding connecting plate, the guide rail assembly comprises an adapter plate, a sliding rail and a sliding block, the adapter plate is arranged between the housing and the sliding rail, the sliding rail is arranged between the adapter plate and the sliding block, the sliding block is arranged in sliding cooperation with the sliding rail, and the sliding connecting plate connects the lead screw and the sliding block.

7. The electric cylinder according to claim 6, characterized in that, The lubricating oil path comprises a guide rail lubricating oil path, one end of the guide rail lubricating oil path is communicated with the lead screw lubricating oil path, and the other end of the guide rail lubricating oil path is communicated to the sliding block.

8. The electric cylinder according to claim 7, characterized in that, The housing, the adapter plate and the sliding rail are sequentially sealed and communicated to form the guide rail lubricating oil path. The electric cylinder comprises an oil injection sealing cover, the oil injection sealing cover is connected to the outer side of the housing and arranged between the housing and the sliding block, and the housing, the oil injection sealing cover and the sliding rail are sequentially sealed and communicated to form the guide rail lubricating oil path.

9. The electric cylinder according to claim 6, characterized in that, The sliding connecting plate comprises a top plate and a side plate, the top plate is connected to one end of the side plate, the lead screw is connected to the top plate at one end outside the housing, and the side plate is connected to one side of the sliding block away from the adapter plate.

10. The electric cylinder according to claim 9, characterized in that, The electric cylinder further comprises an organ case, one end of the organ case is connected to the housing, the other end of the organ case is connected to the top plate, the organ case is sleeved on one end of the lead screw outside the housing, and the organ case is connected to the housing and the top plate to enclose one end of the lead screw outside the housing in the organ case; and / or, The electric cylinder further comprises an organ case, the organ case is arranged on the side of the adapter plate and connected to the sliding connecting plate, the side plate has a containing groove, and the organ case is connected to the adapter plate and the sliding connecting plate to enclose the sliding rail and the sliding block in the containing groove; and / or, The top plate and the side plate are connected through a connecting piece. The electric cylinder comprises an oil injection sealing cover, the oil injection sealing cover is connected to the outer side of the housing and arranged between the housing and the sliding block, and the housing, the oil injection sealing cover and the sliding rail are sequentially sealed and communicated to form the guide rail lubricating oil path.

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