Electric hydraulic push rod with protection mechanism
By setting protective mechanisms such as external extrusion blocks and internal check valves on the electro-hydraulic push rod, the problem of damage to the lifting and folding table bracket caused by the overposition of the electro-hydraulic push rod is solved, and buffering and hydraulic oil for the overposition of the push rod is achieved. Reflow reduces the risk of damage.
Patent Information
- Application Number
- CN202323558485.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-12-26
AI Technical Summary
The electro-hydraulic push rod is easily overpositioned during the height adjustment of the lifting and folding table, resulting in damage to the bracket.
An electro-hydraulic push rod with an external protection mechanism and an internal protection mechanism is designed to provide a pressing buffer limit in the sliding position through an external extrusion block and connecting rod with the first spring, and a check valve and a return flow are provided inside. Pipe fittings to reduce pressure relief of hydraulic oil and prevent over-squeezing.
It effectively reduces the power of the electro-hydraulic push rod when it is out of position and reduces the risk of damage to the lifting and folding table bracket.
Smart Images
Figure CN222141652U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electric push rods for lifting and folding tables, and specifically to an electric hydraulic push rod with a protective mechanism. Background Art
[0002] A lift-and-fold table is a versatile table that is height-adjustable and foldable. It is usually composed of a sturdy tabletop and an adjustable bracket. The bracket is controlled by a hydraulic or electric push rod to achieve height adjustment. The tabletop is usually made of durable materials such as wood, metal or plastic to ensure its stability and durability. This table is usually designed for offices, schools, medical institutions, homes and other places to meet different needs and space constraints.
[0003] The electric hydraulic push rod is directly used on the lifting folding table. The control of the electric hydraulic push rod can be directly controlled by push-type manual control. During the adjustment of the electric hydraulic push rod, since one end of the scissor-type frame connected to the lifting folding table is connected to the outside of the electric hydraulic push rod, the electric hydraulic push rod may cause damage to the bracket part of the lifting folding table due to excessive extension. In order to reduce the above damage, an electric hydraulic push rod with a protective mechanism is proposed to solve the above problem. Utility Model Content
[0004] In view of the deficiencies in the prior art, the present application provides an electric hydraulic push rod with a protective mechanism, which has the advantages of limiting the over-position of the electric hydraulic push rod and reducing damage to the bracket of the lifting and folding table caused by over-position.
[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: an electric hydraulic push rod with a protection mechanism, comprising a mounting frame, an electric hydraulic push rod mounted on the mounting frame, and a connecting member arranged outside the electric hydraulic push rod, and both sides of the mounting frame are provided with external protection devices that cooperate with the connecting member to perform restrictions;
[0006] The outer protection device includes a fixing frame fixedly mounted on the inner side of the mounting frame, an extrusion block mounted in the guide frame, a connecting rod connected to the extrusion block and the fixing frame, and a first spring mounted on the fixing frame;
[0007] An internal protection mechanism for buffering the piston rod is arranged inside the electric hydraulic push rod, and the internal protection mechanism includes a one-way valve fixedly installed on one end of the electric hydraulic push rod, a return pipe connected to the one-way valve and a limiting plate built into the electric hydraulic push rod.
[0008] Furthermore, both ends of the mounting frame are bent in a C-shape to form a bent portion, the connecting member extends into the bent portion, and the housing of the electric hydraulic push rod is fixedly connected to one end of the mounting frame.
[0009] Furthermore, the connecting member includes an extension rod fixedly mounted on the outside of the electric hydraulic push rod housing and a guide frame fixedly mounted in the bent portion of the mounting frame, the extension rod extends into the guide frame and slides relative to the guide frame, and the outside of the extension rod is rotatably mounted with support legs that support the lifting and folding table.
[0010] Furthermore, the fixing frame is a U-shaped frame, and the open end faces the end of the guide frame, one side of the fixing frame is fixedly connected to the inner wall of the bent part of the mounting frame, a sliding rod is fixedly installed on the inner side of the fixing frame, and a connecting sleeve is slidably installed on the outside of the sliding rod, one end of the connecting rod is rotatably connected to the extrusion block, and the other end is rotatably connected to the connecting sleeve, and the number of the connecting rods is two, and the two connecting rods are symmetrically arranged on the upper and lower sides of one end of the extrusion block.
[0011] Furthermore, one end of the first spring is fixedly connected to the connecting sleeve, and the other end is fixedly connected to the inner wall of the fixing frame.
[0012] Furthermore, a second spring is installed between the limiting plate and the inner wall of the electric hydraulic push rod.
[0013] Furthermore, the reflux pipe assembly includes a reflux column fixedly mounted on the outside of the electric hydraulic push rod housing and a reflux pipe connected to the outside of the reflux column, the reflux column and the one-way valve are connected to each other, and the reflux pipe is connected to the oil cylinder of the electric hydraulic push rod.
[0014] Furthermore, the limiting plate is tightly fitted to the inner wall of the electric hydraulic push rod, and the limiting plate is slidably connected to the piston rod in the electric hydraulic push rod, and the limiting plate and the piston rod of the electric hydraulic push rod are sealed by a sealing ring.
[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0016] The electric hydraulic push rod with a protection mechanism is doubly protected by an external protection mechanism arranged outside the electric hydraulic push rod and an internal protection mechanism built into the electric hydraulic push rod. The sliding position of the extension rod is squeezed and buffered by an externally installed extrusion block in cooperation with the connecting rod and the first spring. At the same time, the hydraulic oil in the electric hydraulic push rod is depressurized and returned by cooperating with the one-way valve inside the electric hydraulic push rod, thereby reducing the power of the electric hydraulic push rod after over-positioning and reducing the risk of damage to the lifting and folding table caused by over-positioning and squeezing. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the overall structure of this application;
[0018] Figure 2A side view of the mounting frame for this application;
[0019] Figure 3 This is a schematic diagram of the side structure of the mounting frame of this application;
[0020] Figure 4 A three-dimensional diagram of the fixing frame for this application;
[0021] Figure 5 This is a schematic diagram of the end structure of the electric hydraulic push rod of this application.
[0022] In the figure: 1. mounting frame; 2. electric hydraulic push rod; 3. extension rod; 4. support leg; 5. guide frame; 6. fixing frame; 7. sliding rod; 8. connecting sleeve; 9. extrusion block; 10. connecting rod; 11. first spring; 12. one-way valve; 13. limiting plate; 14. second spring; 15. reflux column; 16. reflux pipe. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0024] See also Figure 1-5 In this embodiment, an electric hydraulic push rod with a protective mechanism includes a mounting frame 1, an electric hydraulic push rod 2 mounted on the mounting frame 1, and a connecting component arranged outside the electric hydraulic push rod 2.
[0025] The two ends of the mounting frame 1 are bent in a C shape to form a bent portion, and the connecting member extends into the bent portion so that the movement of the connecting member is guided. The outer shell of the electric hydraulic push rod 2 is fixedly connected to one end of the mounting frame 1, so that the outer shell of the electric hydraulic push rod 2 can move relative to the mounting frame 1.
[0026] In this embodiment, the connecting member includes an extension rod 3 fixedly mounted on the outside of the housing of the electric hydraulic push rod 2 and a guide frame 5 fixedly mounted in the bent portion of the mounting frame 1. The extension rod 3 extends into the guide frame 5 and slides relative to the guide frame 5. A support leg 4 for supporting a liftable folding table is rotatably mounted on the outside of the extension rod 3. The support leg 4 serves as a part of a scissor-type frame supporting the liftable folding table. After the angle of the support leg 4 is changed, the height of the liftable folding table can be adjusted.
[0027] In this embodiment, both sides of the mounting frame 1 are provided with external protective devices that cooperate with the connecting components for restriction, and the external protective devices include a fixing frame 6 fixedly installed on the inner side of the mounting frame 1, an extrusion block 9 installed in the guide frame 5 and a connecting rod 10 connected to the extrusion block 9 and the fixing frame 6, and a first spring 11 installed on the fixing frame 6. The fixing frame 6 is a U-shaped frame, and the open end faces the end of the guide frame 5. One side of the fixing frame 6 is fixedly connected to the inner wall of the bent part of the mounting frame 1.
[0028] It should be noted that a sliding rod 7 is fixedly installed on the inner side of the fixed frame 6, and a connecting sleeve 8 is slidably installed on the outside of the sliding rod 7. One end of the connecting rod 10 is rotatably connected to the extrusion block 9, and the other end is rotatably connected to the connecting sleeve 8. At the same time, there are two connecting rods 10, and the two connecting rods 10 are symmetrically arranged on the upper and lower sides of one end of the extrusion block 9.
[0029] In order to achieve reverse thrust buffering for over-positioning, one end of the first spring 11 in this embodiment is fixedly connected to the connecting sleeve 8, and the other end is fixedly connected to the inner wall of the fixing frame 6. The first spring 11 can prevent the extrusion block 9 from moving toward the fixing frame 6.
[0030] In this embodiment, an internal protection mechanism for buffering the piston rod is provided inside the electric hydraulic push rod 2. The internal protection mechanism includes a one-way valve 12 fixedly installed on one end of the electric hydraulic push rod 2, a return pipe connected to the one-way valve 12 and a limiting plate 13 built into the electric hydraulic push rod 2. A second spring 14 is installed between the limiting plate 13 and the inner wall of the electric hydraulic push rod 2. The second spring 14 pushes the limiting plate 13 to cross the one-way valve 12 and toward the position of the piston rod in the electric hydraulic push rod.
[0031] It should be noted that the reflux pipe includes a reflux column 15 fixedly installed on the outside of the housing of the electric hydraulic push rod 2 and a reflux pipe 16 connected to the outside of the reflux column 15. The reflux column 15 and the one-way valve 12 are connected to each other, and the reflux pipe 16 is connected to the oil cylinder of the electric hydraulic push rod 2 for returning the hydraulic oil.
[0032] The limiting plate 13 in this embodiment fits tightly against the inner wall of the electric hydraulic push rod 2, and is slidably connected to the piston rod in the electric hydraulic push rod 2. The limiting plate 13 and the piston rod of the electric hydraulic push rod 2 are sealed by a sealing ring, so that the limiting plate 13 will not be pushed to move when the piston rod moves normally, but the limiting plate 13 will be squeezed to move when the piston rod contacts the limiting plate 13.
[0033] The working principle of the above embodiment is:
[0034] The hydraulic oil in the oil cylinder of the electric hydraulic push rod 2 is drawn out by the motor of the electric hydraulic push rod 2 and filled into the piston cylinder, so that the piston rod in the piston cylinder moves relative to the piston cylinder, that is, the housing of the electric hydraulic push rod 2 moves and extends relative to the mounting frame 1. At this time, the support leg 4 connected to the extension rod 3 on the housing of the electric hydraulic push rod 2 changes its angle as the electric hydraulic push rod 2 extends, and then the height of the lifting folding table changes. When the electric hydraulic push rod 2 extends close to the limit position of the stroke, it is about to be over-positioned, and the extension rod 3 slides along the guide frame 5. When the extension rod 3 is close to the end of the guide frame 5, the extension rod 3 When the electric hydraulic push rod 2 is in the state of being in the state of being moved, the extrusion block 9 located in the guide frame 5 is squeezed by the extension rod 3. The extrusion block 9 pushes the two connecting sleeves 8 located outside the slide rod 7 through the two connecting rods 10 to compress the first spring 11 for protection. At the same time, the piston rod located in the electric hydraulic push rod 2 squeezes the limiting plate 13, so that the limiting plate 13 slides relative to the piston cylinder of the electric hydraulic push rod 2 until the limiting plate 13 passes the position of the one-way valve 12, so that the hydraulic oil in the electric hydraulic push rod 2 can be filled into the reflux columns 15 on both sides, and the hydraulic oil is refluxed toward the oil cylinder of the electric hydraulic push rod 2, thereby reducing the damage to the supporting part of the lifting and folding table caused by over-extrusion.
[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0036] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. An electric hydraulic push rod with a protective mechanism, comprising a mounting frame (1), an electric hydraulic push rod (2) mounted on the mounting frame (1), and a connecting member arranged outside the electric hydraulic push rod (2), characterized in that: Both sides of the mounting frame (1) are provided with external protection devices that cooperate with the connecting member to perform restrictions; The outer protection device comprises a fixing frame (6) fixedly mounted on the inner side of the mounting frame (1), an extrusion block (9) mounted in the guide frame (5), a connecting rod (10) connected to the extrusion block (9) and the fixing frame (6), and a first spring (11) mounted on the fixing frame (6); An internal protection mechanism for buffering the piston rod is arranged inside the electric hydraulic push rod (2), and the internal protection mechanism includes a one-way valve (12) fixedly mounted on one end of the electric hydraulic push rod (2), a return pipe connected to the one-way valve (12), and a limiting plate (13) built into the electric hydraulic push rod (2).
2. The electric hydraulic push rod with a protection mechanism according to claim 1, characterized in that: Both ends of the mounting frame (1) are bent in a C-shape to form a bent portion, the connecting member extends into the bent portion, and the outer shell of the electric hydraulic push rod (2) is fixedly connected to one end of the mounting frame (1).
3. The electric hydraulic push rod with a protection mechanism according to claim 1, characterized in that: The connecting member comprises an extension rod (3) fixedly mounted on the outside of the housing of the electric hydraulic push rod (2) and a guide frame (5) fixedly mounted in the bent portion of the mounting frame (1); the extension rod (3) extends into the guide frame (5) and slides relative to the guide frame (5); and a support leg (4) for supporting a lifting folding table is rotatably mounted on the outside of the extension rod (3).
4. The electric hydraulic push rod with a protection mechanism according to claim 1, characterized in that: The fixing frame (6) is a U-shaped frame, and the open end faces the end of the guide frame (5). One side of the fixing frame (6) is fixedly connected to the inner wall of the bent part of the mounting frame (1). A sliding rod (7) is fixedly installed on the inner side of the fixing frame (6). A connecting sleeve (8) is slidably installed on the outside of the sliding rod (7). One end of the connecting rod (10) is rotatably connected to the extrusion block (9), and the other end is rotatably connected to the connecting sleeve (8). At the same time, the number of the connecting rods (10) is two, and the two connecting rods (10) are symmetrically arranged on the upper and lower sides of one end of the extrusion block (9).
5. The electric hydraulic push rod with a protection mechanism according to claim 4, characterized in that: One end of the first spring (11) is fixedly connected to the connecting sleeve (8), and the other end is fixedly connected to the inner wall of the fixing frame (6).
6. The electric hydraulic push rod with a protection mechanism according to claim 1, characterized in that: A second spring (14) is installed between the limiting plate (13) and the inner wall of the electric hydraulic push rod (2).
7. The electric hydraulic push rod with a protection mechanism according to claim 6, characterized in that: The reflux pipe assembly comprises a reflux column (15) fixedly mounted on the outside of the housing of the electric hydraulic push rod (2) and a reflux pipe (16) connected to the outside of the reflux column (15); the reflux column (15) and the one-way valve (12) are connected to each other, and the reflux pipe (16) is connected to the oil cylinder of the electric hydraulic push rod (2).
8. The electric hydraulic push rod with a protection mechanism according to claim 6, characterized in that: The limiting plate (13) is tightly fitted to the inner wall of the electric hydraulic push rod (2), and the limiting plate (13) is slidably connected to the piston rod in the electric hydraulic push rod (2), and the limiting plate (13) and the piston rod of the electric hydraulic push rod (2) are sealed by a sealing ring.