Electric cylinder convenient to lubricate

Abstract

The utility model provides an electric cylinder convenient to lubricate. The electric cylinder convenient to lubricate comprises a cylinder body, a lead screw, a piston rod, a lead screw nut and a bearing seat. The lead screw nut is located in the cylinder body. The bearing seat is mounted at the rear end of the cylinder body; the other end of the screw rod penetrates through the bearing seat and extends out of the rear end of the cylinder body; the front end of the lead screw nut is connected with a piston rod, and the end, away from the lead screw nut, of the piston rod extends out of the front end of the cylinder body. An oil inlet hole for injecting lubricating grease is formed in the cylinder body; the outer side of the bearing seat makes contact with the inner side of the cylinder body, a first oil inlet channel is formed in the bearing seat, and an inlet of the first oil inlet channel communicates with the oil inlet hole. The lead screw nut is provided with a second oil inlet channel, and lubricating grease flows to the lead screw through the oil inlet hole, the first oil inlet channel and the second oil inlet channel in sequence. The electric cylinder is convenient to inject grease and maintain.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electric cylinders, in particular to an electric cylinder facilitating lubrication. BACKGROUND

[0002] An electric cylinder is a kind of efficient and reliable mechanical equipment, which is widely used in various industrial fields. It drives the piston rod through the electric motor to convert linear motion into working force, which is used for pushing, pulling, lifting, compacting and other working occasions. The electric cylinder has the advantages of simple structure, small size, light weight, large power, fast response speed, high precision and programmable control, and is an important part of modern industrial automation production.

[0003] In the operation process of the electric cylinder, the lead screw drives the piston rod to move accurately. However, as the electric cylinder is used, the continuous friction between the lead screw nut and the lead screw may cause damage to the lead screw structure. In order to ensure the stable operation of the electric cylinder, it is necessary to regularly apply lubricating grease to the lead screw. In the related art, the lead screw is usually taken out from the electric cylinder for the application of lubricating grease. This application method is time-consuming and laborious, which seriously affects the maintenance efficiency of the electric cylinder.

[0004] Therefore, the application is proposed. CONTENT OF THE INVENTION

[0005] The application is proposed in consideration of the above problems. According to one aspect of the application, an electric cylinder facilitating lubrication is provided, which comprises a cylinder body, a lead screw, a piston rod, a lead screw nut and a bearing seat.

[0006] The bearing seat is installed at the rear end of the cylinder body, one end of the lead screw is deep into the cylinder body, and the other end of the lead screw extends out of the rear end of the cylinder body through the bearing seat.

[0007] The lead screw nut is drivingly connected to the lead screw, the front end of the lead screw nut is connected to the piston rod, and the end of the piston rod away from the lead screw nut extends out of the front end of the cylinder body.

[0008] An oil inlet hole for injecting lubricating grease is arranged on the cylinder body.

[0009] The outer side of the bearing seat is in contact with the inner side of the cylinder body, a first oil inlet channel is arranged on the bearing seat, and the inlet of the first oil inlet channel is in communication with the oil inlet hole.

[0010] A second oil inlet channel is arranged on the lead screw nut, and the lubricating grease flows to the lead screw through the oil inlet hole, the first oil inlet channel and the second oil inlet channel in sequence.

[0011] Exemplarily, the anti-collision pad is provided with a third oil inlet channel, and the lubricating grease flows to the lead screw through the oil inlet hole, the first oil inlet channel, the third oil inlet channel and the second oil inlet channel in sequence.

[0012] Exemplarily, the anti-collision pad is provided with a transition joint near the bearing seat, and the lubricating grease flowing out of the first oil inlet channel flows to the third oil inlet channel through the transition joint when the lead screw is lubricated.

[0013] Exemplarily, the transition joint comprises a fixed part and a movable part, the fixed part is fixed on the anti-collision pad, the fixed part has a movable cavity, one end of the movable part is movably arranged in the movable cavity, and the other end of the movable part extends out of the movable cavity, and the movable part communicates with the first oil inlet channel when the lead screw is lubricated.

[0014] Exemplarily, one end of the movable part is inserted into the first oil inlet channel when the lead screw is lubricated.

[0015] Exemplarily, the piston rod is provided with a fourth oil inlet channel, and the lubricating grease enters the second oil inlet channel through the fourth oil inlet channel.

[0016] Exemplarily, the outlet of the second oil inlet channel is located in the middle of the lead screw nut in the front-to-back direction.

[0017] Exemplarily, the drive motor and a transmission assembly are further included, and the drive motor is in transmission connection with the lead screw through the transmission assembly.

[0018] Exemplarily, the cylinder is provided with a proximity switch, and the proximity switch is in communication connection with the drive motor.

[0019] Exemplarily, the oil inlet hole is located on the side wall of the cylinder.

[0020] Compared with the prior art, the embodiment provides a delicate lubricating system design, which is composed of an oil inlet pipeline formed by an oil inlet hole, a first oil inlet channel and a second oil inlet channel. This design allows the lubricating grease to be accurately injected into the gap between the screw rod and the screw nut through the oil inlet hole without disassembling the electric cylinder, realizes a simple and fast grease injection process, and ensures high lubricating effect. In this scheme, the outer side of the bearing seat is in close contact with the inner side of the cylinder body, the oil inlet hole is directly connected with the inlet of the first oil inlet channel, and the lubricating grease can directly and accurately flow into the first oil inlet channel, effectively avoiding the lubricating grease from leaking to other areas of the cylinder body, so as to ensure the accuracy of the grease injection. In addition, only a small oil inlet hole needs to be arranged on the cylinder body, which has little effect on the overall structural strength of the cylinder body. In summary, the scheme not only makes the grease injection operation of the electric cylinder convenient and efficient, but also has remarkable grease injection effect, significantly improves the maintenance efficiency of the electric cylinder, and reduces the maintenance cost.

[0021] The above description is only a summary of the technical scheme of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the scope of the present application. Moreover, the same reference numerals in the attached drawings indicate the same or similar components. In the drawings:

[0023] Figure 1 The overall structure schematic diagram of the electric cylinder with convenient lubrication for an embodiment of the present application is shown in the figure.

[0024] Figure 2 The overall structure schematic diagram of the electric cylinder with convenient lubrication for an embodiment of the present application is shown in the figure. Figure 1 The external structure schematic diagram of the electric cylinder is shown in the figure.

[0025] Figure 3 The internal structure schematic diagram of the electric cylinder is shown in the figure. Figure 2 The internal structure schematic diagram of the electric cylinder is shown in the figure.

[0026] Figure 4 The partial internal structure cross-sectional schematic diagram of the electric cylinder obtained by cutting along A-A in the figure is shown in the figure. Figure 2 The partial internal structure cross-sectional schematic diagram of the electric cylinder obtained by cutting along A-A in the figure is shown in the figure. The partial internal structure cross-sectional schematic diagram of the electric cylinder obtained by cutting along A-A in the figure is shown in the figure.

[0027] The partial internal structure cross-sectional schematic diagram of the electric cylinder obtained by cutting along A-A in the figure is shown in the figure. Figure 5 The partial internal structure cross-sectional schematic diagram of the electric cylinder obtained by cutting along A-A in the figure is shown in the figure. Figure 4 The partial internal structure cross-sectional schematic diagram of the electric cylinder obtained by cutting along A-A in the figure is shown in the figure. The partial internal structure cross-sectional schematic diagram of the electric cylinder obtained by cutting along A-A in the figure is shown in the figure.

[0028] In the figure: 1, piston rod; 101, fourth oil inlet channel; 2, flange plate; 3, front end cover; 4, cylinder body; 401, oil inlet hole; 5, transmission assembly; 6, driving motor; 7, screw rod; 8, bearing seat; 801, first oil inlet channel; 9, transition joint; 901, fixed part; 902, movable part; 10, anti-collision pad; 1001, third oil inlet channel; 11, transition pipe; 12, screw nut; 1201, second oil inlet channel; 13, proximity switch. DETAILED DESCRIPTION

[0029] In the following description, a large number of details are provided in order to be able to thoroughly understand the present application. However, it can be appreciated by those skilled in the art that the following description only relates to preferred embodiments of the present application, and the present application can be implemented without one or more of such details. In addition, in order to avoid confusion with the present application, some technical features known in the art are not described.

[0030] As described above, in the related art, it is generally necessary to take out the screw rod from the electric cylinder for greasing. Specifically, in the related art, when greasing, the front end cover of the cylinder body of the electric cylinder needs to be disassembled first, then the screw rod is disassembled from the cylinder body, and finally the grease is applied to the disassembled screw rod. After the greasing is completed, the screw rod is installed. This greasing method is time-consuming and laborious, and seriously affects the maintenance efficiency of the electric cylinder. In some embodiments of the related art, a grease nipple is added to the cylinder body, and the grease is injected into the cylinder body through the grease nipple. However, this method cannot determine whether the injected grease is added to the screw rod, and the effect is poor. In other embodiments of the related art, a larger observation window is provided on the cylinder body, and the grease injection gun is inserted into the cylinder body for grease injection. On the one hand, this grease injection method can only ensure that the grease is injected into the screw rod, and cannot be directly injected between the screw rod and the screw nut; on the other hand, the observation window reduces the strength of the cylinder body and is easy to drop foreign matters into the cylinder body. In summary, the grease injection effect of the grease injection scheme in the related art is poor, time-consuming and laborious. In view of this, the present application provides an electric cylinder convenient for lubrication, which is provided with an oil inlet hole on the cylinder body. When grease injection is needed, the grease can be accurately injected between the screw rod and the screw nut through the oil inlet hole, the grease injection process is simple and convenient, and the grease injection effect is good. The specific structure of the electric cylinder is described in detail below.

[0031] In order to more clearly describe the technical solutions in the present application, the following will be combined with Figures 1-5 to describe one specific embodiment of the present application.

[0032] In combination with Figures 1-5The embodiment provides a lubrication-facilitating electric cylinder, which comprises a cylinder body 4, a screw rod 7, a piston rod 1, a screw nut 12 and a bearing seat 8; the screw nut 12 is located in the cylinder body 4; the bearing seat 8 is installed at the rear end of the cylinder body 4; the screw rod 7 is deeply inserted into the cylinder body 4 at one end and extends out of the rear end of the cylinder body 4 through the bearing seat 8 at the other end; the screw nut 12 is in transmission connection with the screw rod 7, the front end of the screw nut 12 is connected with the piston rod 1, and the end of the piston rod 1, which is away from the screw nut 12, extends out of the front end of the cylinder body 4; the cylinder body 4 is provided with an oil inlet hole 401 for injecting lubricating grease; the outer side of the bearing seat 8 is in contact with the inner side of the cylinder body 4, the bearing seat 8 is provided with a first oil inlet channel 801, and the inlet of the first oil inlet channel 801 is in communication with the oil inlet hole 401; the screw nut 12 is provided with a second oil inlet channel 1201, and the lubricating grease flows onto the screw rod 7 through the oil inlet hole 401, the first oil inlet channel 801 and the second oil inlet channel 1201 in sequence.

[0033] In the present embodiment, the extending direction of the piston rod 1 is regarded as the front direction, and the retracting direction is regarded as the rear direction.

[0034] It can be understood that the bearing seat 8 can be provided with a bearing, and the screw rod 7 can extend out of the rear end of the cylinder body 4 through the inner ring of the bearing.

[0035] In the scheme of the present embodiment, when it is required to inject lubricating grease into the screw rod 7, the screw rod 7 can be controlled to rotate and drive the screw nut 12 to move to a specific position (which can be referred to as an injection position) in the rear direction, at which the second oil inlet channel 1201 on the screw nut 12 is in communication with the outlet of the first oil inlet channel 801. At this time, the user can inject lubricating grease into the cylinder body 4 through the oil inlet hole 401, and the lubricating grease flows onto the screw rod 7 and the screw nut 12 through the oil inlet hole 401, the first oil inlet channel 801 and the second oil inlet channel 1201 in sequence. It can be understood that the injection position of the lubricating grease at this time is the screw rod segment where the screw nut 12 is located, and therefore, the injection position of the lubricating grease at this time is between the screw rod 7 and the screw nut 12. Subsequently, as the screw rod 7 normally operates, the screw nut 12 moves relative to the screw rod 7 in the front and rear directions, and thus the lubricating grease is uniformly brought to each part of the screw rod 7, thereby improving the lubrication between the screw rod 7 and the screw nut 12.

[0036] In some implementation schemes of the present embodiment, the first oil inlet channel 801 and the second oil inlet channel 1201 can be directly communicated. Of course, the first oil inlet channel 801 and the second oil inlet channel 1201 can also be indirectly communicated, for example, through a channel provided on an intermediate component (such as the anti-collision pad 10).

[0037] In a scheme not shown in the present embodiment, a sealing plug is installed on the oil inlet hole 401.

[0038] The embodiment provides a delicate lubricating system design, which is composed of an oil inlet pipeline formed by the oil inlet hole 401, the first oil inlet channel 801 and the second oil inlet channel 1201. The design allows the lubricating grease to be accurately injected into the gap between the screw rod 7 and the screw nut 12 through the oil inlet hole 401 without disassembling the electric cylinder, realizes a simple and fast grease injection process, and ensures high lubricating effect. In the scheme, the outer side of the bearing seat 8 is in close contact with the inner side of the cylinder body 4, the oil inlet hole 401 is directly connected with the inlet of the first oil inlet channel 801, the lubricating grease can directly and accurately flow into the first oil inlet channel 801, the leakage of the lubricating grease to other areas of the cylinder body 4 is effectively avoided, and the accuracy of the grease injection is ensured. In addition, only a small oil inlet hole 401 needs to be arranged on the cylinder body 4, and the influence on the overall structural strength of the cylinder body 4 is minimal. In conclusion, the scheme not only makes the grease injection operation of the electric cylinder convenient and efficient, but also has a remarkable grease injection effect, significantly improves the maintenance efficiency of the electric cylinder, and reduces the maintenance cost.

[0039] Exemplarily, in combination with reference to Figure 3 and Figure 4 , the anti-collision pad 10 is arranged on the side of the screw nut 12 close to the bearing seat 8, the third oil inlet channel 1001 is arranged on the anti-collision pad 10, and the lubricating grease flows to the screw rod 7 through the oil inlet hole 401, the first oil inlet channel 801, the third oil inlet channel 1001 and the second oil inlet channel 1201 in sequence.

[0040] In some embodiments, when the grease is injected into the screw rod 7, the anti-collision pad 10 is in contact with the bearing seat 8, and the outlet of the first oil inlet channel 801 is directly communicated with the inlet of the third oil inlet channel 1001. In a specific embodiment, a sealing ring is arranged at the inlet of the first oil inlet channel 801. In this case, when the anti-collision pad 10 is in contact with the bearing seat 8, the sealing ring can seal between the outlet of the first oil inlet channel 801 and the inlet of the third oil inlet channel 1001, so as to avoid the leakage of the lubricating grease. Of course, the outlet of the first oil inlet channel 801 can also indirectly communicate with the inlet of the third oil inlet channel 1001, which is not described herein.

[0041] According to the above-described grease injection process, when the grease is injected, the screw nut 12 needs to be moved backward to the grease injection position, so that the first oil inlet channel 801 is communicated with the second oil inlet channel 1201. In the scheme of the example, when the grease needs to be injected, the screw nut 12 is moved backward to the grease injection position, the first oil inlet channel 801 is communicated with the second oil inlet channel 1201 through the third oil inlet channel 1001, and the lubricating grease can flow to the screw rod 7 through the oil inlet hole 401, the first oil inlet channel 801, the third oil inlet channel 1001 and the second oil inlet channel 1201 in sequence.

[0042] In the above technical solution, the anti-collision pad 10 can play a shock absorption and buffering role, avoiding mutual impact between the screw nut 12 and the bearing seat 8 during the process of the screw nut 12 moving backward to the grease injection position. This helps to extend the service life of the screw nut 12 and the bearing seat 8.

[0043] For example, in conjunction with reference Figure 3 and Figure 4 The anti-collision pad 10 has a transition joint 9 near the bearing housing 8. When grease is injected into the lead screw 7, the grease flowing from the first oil inlet channel 801 flows to the third oil inlet channel 1001 via the transition joint 9. In this example, the grease flowing from the first oil inlet channel 801 can flow to the third oil inlet channel 1001 via the transition joint 9. At this time, the lead screw nut 12 indirectly contacts the bearing housing 8 via the anti-collision pad 10 and the transition joint 9, which can further avoid collision impact between the two. Moreover, this method of delivering grease via the transition joint 9 can prevent grease from leaking between the anti-collision pad 10 and the bearing housing 8, improve the grease injection effect, and avoid grease waste.

[0044] For example, such as Figure 5 As shown, the transition joint 9 includes a fixed part 901 and a movable part 902. The fixed part 901 is fixed on the anti-collision pad 10. The fixed part 901 has a movable cavity. One end of the movable part 902 is movably disposed in the movable cavity, and the other end extends out of the movable cavity. When grease is injected into the lead screw 7, the movable part 902 is connected to the first oil inlet channel 801.

[0045] In this example, as the lead screw nut 12 moves backward to the grease injection position, after one end of the movable part 902 contacts the bearing housing 8, the movable part 902 moves forward relative to the fixed part 901 as the lead screw nut 12 moves. This arrangement avoids the movable part 902 impacting the surface of the bearing housing 8, improving the service life of the bearing housing 8 and the movable part 902, and thus improving the overall service life of the electric cylinder.

[0046] For example, such as Figure 5 As shown, when grease is injected into the lead screw 7, one end of the movable part 902 is inserted into the first oil inlet channel 801. The end of the movable part 902 can be interference-fitted with the first oil inlet channel 801. By inserting one end of the movable part 902 into the first oil inlet channel 801, the sealing between the movable part 902 and the first oil inlet channel 801 can be improved, preventing grease leakage.

[0047] For example, such as Figure 4 As shown, the piston rod 1 is provided with a fourth oil inlet channel 101, through which the grease enters the second oil inlet channel 1201.

[0048] In such Figure 4In the illustrated embodiment, a transition pipe 11 is provided between the anti-collision pad 10 and the piston rod 1, and the third oil inlet channel 1001 is connected to the fourth oil inlet channel 101 through the transition pipe 11. When the user adds grease to the oil inlet hole 401, the grease flows sequentially through the oil inlet hole 401, the first oil inlet channel 801, the transition joint 9, the third oil inlet channel 1001, the transition pipe 11, the fourth oil inlet channel 101, and the second oil inlet channel 1201 to the lead screw 7. This channel arrangement ensures that the grease is accurately injected into the lead screw 7, thereby ensuring the lubrication effect between the lead screw 7 and the lead screw nut 12.

[0049] For example, such as Figure 4 As shown, the outlet of the second oil inlet channel 1201 is located in the middle of the lead screw nut 12 in a front-to-back direction. In related technologies, the oil hole of the lead screw nut is usually located at the end of the lead screw nut. When grease is injected into the lead screw through the oil hole, the injected grease tends to flow out from the end and is difficult to penetrate further into the lead screw nut. Moreover, this method wastes grease, especially since the cylinder space of an electric cylinder is limited. Excessive grease can clog the cylinder space, hindering the movement of the piston rod inside the cylinder, and may even cause the piston rod to stop moving. In the solution of this example, when injecting grease into the lead screw 7, this solution adopts a clever injection method: injecting the grease into the middle area of ​​the lead screw nut 12. Subsequently, the grease will gradually spread from the middle to both ends, covering a wider area. This injection method ensures that the lead screw 7 can receive comprehensive and uniform lubrication, greatly improving its operating efficiency and durability.

[0050] For example, such as Figure 1 As shown, it also includes a drive motor 6 and a transmission assembly 5; the drive motor 6 is connected to the lead screw 7 via the transmission assembly 5. In some embodiments, the transmission assembly 5 may include a meshing drive gear and a driven gear, with the drive gear mounted on the drive shaft of the drive motor 6 and the driven gear mounted on the end of the lead screw 7 that extends into the transmission assembly 5. Of course, in addition to gear transmission, the transmission assembly 5 may also be designed using belt transmission, chain transmission, etc., which will not be elaborated further. The overall structure of the electric cylinder in this solution is simple and can stably drive the piston rod 1.

[0051] For example, such as Figure 2 As shown, a proximity switch 13 is installed on the cylinder 4, and the proximity switch 13 is communicatively connected to the drive motor 6.

[0052] In this example configuration, proximity switch 13 sends a proximity signal to drive motor 6 when it senses that the lead screw nut 12 has moved close to the grease injection position. Upon receiving the proximity signal, drive motor 6 reduces the rotational speed of the lead screw 7, causing the lead screw nut 12 to move to the grease injection position at a lower, safer speed. The installation position of proximity switch 13 can be set as needed and will not be elaborated further.

[0053] In one specific embodiment, the proximity switch 13 can send a proximity signal to the drive motor 6 when it senses that the lead screw nut 12 has moved to a preset position close to the grease injection position (e.g., a position 2 cm away from the grease injection position); when the drive motor 6 receives the proximity signal, it can reduce the rotation speed of the lead screw 7 to the target rotation speed and stop driving the lead screw 7 to rotate after a preset time. At this time, the lead screw nut 12 is located at the grease injection position.

[0054] The above technical solution, by setting a proximity switch 13, can identify the position of the lead screw nut 12 and make the movement of the lead screw nut 12 slow down when it approaches the grease injection position. This ensures that the lead screw nut 12 moves safely to the grease injection position and avoids impact between components.

[0055] For example, such as Figure 1 As shown, the oil inlet 401 is located on the side wall of the cylinder body 4. This side wall can be the left or right side wall. The space on the left and right sides of the cylinder body 4 is relatively large, while the space on the top and bottom sides is relatively small. By setting the oil inlet 401 on the side wall of the cylinder body 4, this design makes it easier for the user to inject grease into the lead screw 7.

[0056] For example, in conjunction with reference Figure 1 , 2 The cylinder body 4 has a front cover 3 at its front end, and the front cover 3 has an opening. The end of the piston rod 1 away from the lead screw nut 12 extends out of the cylinder body 4 through the opening. In this design, by setting the front cover 3, the components inside the cylinder body 4 can be protected from the intrusion of external dust, moisture and other contaminants, thus extending the overall service life of the electric cylinder.

[0057] For example, in conjunction with reference Figure 1 , 2 A flange 2 is installed on the side of the front cover 3 away from the cylinder body 4. In this design, the flange 2 provides a standard interface, allowing the electric cylinder to be easily connected to other mechanical components or equipment.

[0058] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front", "back", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0059] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0060] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, components, parts, and / or combinations thereof.

[0061] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0062] This application has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the scope of the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. An electric cylinder that is easy to lubricate, characterized in that, include: The cylinder body, lead screw, piston rod, lead screw nut, and bearing housing; the lead screw nut is located inside the cylinder body. The bearing housing is installed at the rear end of the cylinder block; One end of the lead screw extends into the cylinder body, and the other end passes through the bearing seat and extends out from the rear end of the cylinder body; The lead screw nut is drivenly connected to the lead screw, the front end of the lead screw nut is connected to the piston rod, and the end of the piston rod away from the lead screw nut extends from the front end of the cylinder body; The cylinder body is provided with an oil inlet for injecting lubricating grease; The outer side of the bearing housing contacts the inner side of the cylinder body, and the bearing housing is provided with a first oil inlet channel, the inlet of the first oil inlet channel being connected to the oil inlet hole; The lead screw nut is provided with a second oil inlet channel, and the grease flows to the lead screw in sequence through the oil inlet hole, the first oil inlet channel and the second oil inlet channel.

2. The electric cylinder according to claim 1, characterized in that, An anti-collision pad is installed on the side of the lead screw nut near the bearing seat. The anti-collision pad is provided with a third oil inlet channel. The grease flows to the lead screw in sequence through the oil inlet hole, the first oil inlet channel, the third oil inlet channel and the second oil inlet channel.

3. The electric cylinder according to claim 2, characterized in that, The anti-collision pad is provided with a transition joint on the side near the bearing seat. When grease is injected into the lead screw, the grease flowing out from the first oil inlet channel flows to the third oil inlet channel through the transition joint.

4. The electric cylinder according to claim 3, characterized in that, The transition joint includes a fixed part and a movable part. The fixed part is fixed to the anti-collision pad. The fixed part has a movable cavity. One end of the movable part is movably disposed in the movable cavity, and the other end extends out of the movable cavity. When grease is injected into the lead screw, the movable part is connected to the first oil inlet channel.

5. The electric cylinder according to claim 4, characterized in that, When grease is injected into the lead screw, one end of the movable part is inserted into the first oil inlet channel.

6. The electric cylinder according to any one of claims 1-5, characterized in that, The piston rod is provided with a fourth oil inlet channel, through which the grease enters the second oil inlet channel.

7. The electric cylinder according to any one of claims 1-5, characterized in that, The outlet of the second oil inlet channel is located in the middle of the lead screw nut in a front-to-back direction.

8. The electric cylinder according to any one of claims 1-5, characterized in that, It also includes a drive motor and a transmission assembly; the drive motor is connected to the lead screw via the transmission assembly.

9. The electric cylinder according to claim 8, characterized in that, A proximity switch is provided on the cylinder block, and the proximity switch is communicatively connected to the drive motor.

10. The electric cylinder according to any one of claims 1-5, characterized in that, The oil inlet is located on the side wall of the cylinder.

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