Oil buffer

Abstract

The utility model relates to a buffer, in particular to an oil pressure buffer, which comprises an oil cylinder mechanism, the oil cylinder mechanism comprises a base, an outer oil cylinder and an inner oil cylinder, and the outer wall of the inner oil cylinder is provided with a throttling hole; the transmission mechanism comprises a buffering cushion, a top cover, a piston rod, a piston and an elastic assembly, the buffering cushion is installed on the side, away from the piston rod, of the top cover, and the piston rod penetrates through the outer oil cylinder so that the piston can be installed in the inner oil cylinder; the pressure relief mechanism is installed on the outer oil cylinder in a penetrating mode, the pressure relief mechanism comprises a hollow bolt and a rubber ball, the hollow bolt is provided with an oil discharge hole communicated with the interior and the exterior of the outer oil cylinder in a penetrating mode, the hollow bolt is provided with a protruding part in the middle of the oil discharge hole, and the rubber ball is installed on the side, facing the interior of the outer oil cylinder, of the protruding part. By means of the structure, the pressure relief mechanism is arranged on the outer oil cylinder, so that the situation that the filled hydraulic oil is excessive is avoided, and the size of the oil cylinder mechanism can be made to be smaller.

Description

Technical Field

[0001] The utility model relates to a buffer, in particular to an oil pressure buffer. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] In automated equipment, linear motion machinery is typically equipped with hydraulic buffers. For example, in elevators, hydraulic buffers protect the elevator from direct impact with external devices when it reaches a predetermined point during operation. Specifically, they provide a buffer at one end, ensuring smooth movement to the predetermined point.

[0004] During the installation process of existing hydraulic buffers, operators are required to fill the buffer with the appropriate amount of hydraulic oil based on the actual on-site requirements. However, in some cases, due to operator irregularities or variations in on-site equipment, the amount of hydraulic oil in the buffer may not meet the required amount. In particular, excessive hydraulic oil can shorten the piston travel of the buffer, causing a sudden increase in internal pressure under impact and leading to structural damage. Therefore, some existing hydraulic buffers, to address these situations and for safety reasons, require additional cavities to accommodate the hydraulic oil. However, this also results in excessive buffer size, increasing costs.

[0005] There is currently no oil pressure buffer that can solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide an oil pressure buffer, which can avoid excessive hydraulic oil from being poured in by arranging a pressure relief mechanism on the outer oil cylinder and can make the size of the oil cylinder mechanism smaller.

[0007] In order to achieve the above-mentioned object, the present invention discloses the following oil pressure buffer; the oil pressure buffer comprises:

[0008] The oil cylinder mechanism includes a base, an outer oil cylinder and an inner oil cylinder. The outer oil cylinder and the inner oil cylinder are mounted on the base, and the outer oil cylinder is sleeved outside the inner oil cylinder. The outer wall of the inner oil cylinder is provided with a throttle hole;

[0009] A transmission mechanism comprising a buffer pad, a top cover, a piston rod, a piston, and an elastic component, wherein the piston rod has a first end and a second end oppositely disposed, the first end of the piston rod being connected to the top cover, and the second end of the piston rod being connected to the piston, the buffer pad being mounted on a side of the top cover facing away from the piston rod, the piston rod passing through the outer cylinder so that the piston is mounted in the inner cylinder, and the outer diameter of the piston matches the inner diameter of the inner cylinder, and the elastic component being disposed between the top cover and the top of the outer cylinder;

[0010] A pressure relief mechanism is installed on the outer cylinder and includes a hollow bolt and a rubber ball. The hollow bolt has an oil discharge hole that passes through and connects the inside and outside of the outer cylinder. The hollow bolt has a raised portion in the middle of the oil discharge hole. The rubber ball is installed on the side of the raised portion facing the inside of the outer cylinder.

[0011] Wherein, hydraulic oil is provided in the oil cylinder mechanism.

[0012] Furthermore, when the buffer pad is subjected to pressure in the direction of the cylinder mechanism, the piston squeezes the hydraulic oil in the inner cylinder, so that the hydraulic oil is squeezed from the inner cylinder through the throttle hole into the outer cylinder until the hydraulic oil in the outer cylinder is poured into the oil drain hole of the hollow bolt. When the preset pressure is exceeded, the rubber ball undergoes elastic deformation and is squeezed out in the direction away from the outer cylinder, so that the hydraulic oil can flow out from the oil drain hole.

[0013] Furthermore, the pressure relief mechanism is arranged at the top position of the outer oil cylinder.

[0014] Furthermore, the outer oil cylinder has a mounting hole that matches the size of the hollow bolt and is used for installing the hollow bolt. The inner wall of the mounting hole has an internal thread, and the outer wall of the hollow bolt has an external thread that matches the internal thread, so that the hollow bolt is threadedly connected to the mounting hole.

[0015] Furthermore, the diameter of the oil drain hole of the hollow bolt matches the diameter of the rubber ball, so that the rubber ball is fixed in the oil drain hole.

[0016] Furthermore, the oil pressure buffer also includes a monitoring mechanism, which includes a trigger rod and a travel switch. The trigger rod has a first end and a second end that are relatively arranged. The first end of the trigger rod is connected to the top cover, and the second end of the trigger rod is arranged toward the direction of the cylinder mechanism. The travel switch is fixed on one side of the cylinder mechanism, wherein, when the oil pressure buffer is in a static state without being subjected to external force, the second end of the trigger rod triggers the travel switch.

[0017] Furthermore, a wear-resistant ring is provided on the periphery of the piston, and the wear-resistant ring contacts the inner wall of the inner cylinder.

[0018] By means of the above technical solution, the beneficial effects of the present invention are as follows:

[0019] The hydraulic buffer of this utility model can be equipped with a pressure relief mechanism on the outer cylinder. When the operator fills the cylinder mechanism with excessive hydraulic oil, the rubber ball in the pressure relief mechanism can be squeezed out of the hollow bolt under the action of the hydraulic pressure during the use of the hydraulic buffer, allowing the excess hydraulic oil to be discharged from the hollow bolt. Before the hydraulic buffer is used, the rubber ball continues to seal the hollow bolt tightly, preventing potential leakage during transportation. At the same time, due to the presence of the aforementioned pressure relief mechanism, the utility model also avoids the problem of excessive size of the hydraulic cylinder mechanism due to the need for additional safety margin space, thereby further saving costs.

[0020] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are for reference and illustration only and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 is a cross-sectional schematic diagram of a hydraulic buffer provided in an embodiment of this specification;

[0023] Figure 2 This is a three-dimensional schematic diagram of a hydraulic mechanism of an oil pressure buffer provided in an embodiment of this specification;

[0024] Figure 3 This is a schematic diagram of a pressure relief mechanism of a hydraulic buffer provided in an embodiment of this specification;

[0025] In the figure: 1, oil cylinder mechanism; 11, base; 12, outer oil cylinder; 13, inner oil cylinder; 131, throttle hole;

[0026] 2. Transmission mechanism; 21. Buffer pad; 22. Top cover; 23. Piston rod; 24. Piston; 25. Elastic component; 26. Wear-resistant ring;

[0027] 3. Pressure relief mechanism; 31. Hollow bolt; 32. Rubber ball;

[0028] 4. Monitoring mechanism; 41. Trigger rod; 42. Travel switch. DETAILED DESCRIPTION

[0029] To help those skilled in the art better understand the technical solutions in this specification, the following will provide a clear and complete description of the technical solutions in the embodiments of this specification, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of them. All other embodiments derived by those skilled in the art based on the embodiments in this specification without creative effort shall fall within the scope of protection of this specification.

[0030] The following is an explanation of the implementation of the present invention through specific specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following implementation methods will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

[0031] It should be understood that although terms such as "first," "second," and "third" may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. In addition, the term "or" as used herein may include any one or more combinations of the associated listed items, as appropriate.

[0032] See Figure 1-3 , is a hydraulic buffer of this embodiment; wherein the hydraulic buffer comprises:

[0033] The cylinder mechanism 1 includes a base 11, an outer cylinder 12, and an inner cylinder 13. The outer cylinder 12 and the inner cylinder 13 are mounted on the base 11, and the outer cylinder 12 is sleeved outside the inner cylinder 13. The outer wall of the inner cylinder 13 is provided with a throttle hole 131.

[0034] The transmission mechanism 2 includes a buffer pad 21, a top cover 22, a piston rod 23, a piston 24, and an elastic component 25. The piston rod 23 has a first end and a second end that are oppositely arranged. The first end of the piston rod 23 is connected to the top cover 22, and the second end of the piston rod 23 is connected to the piston 24. The buffer pad 21 is installed on the side of the top cover 22 away from the piston rod 23. The piston rod 23 passes through the outer cylinder 12 so that the piston 24 is installed in the inner cylinder 13. The outer diameter of the piston 24 matches the inner diameter of the inner cylinder 13. The elastic component 25 is arranged between the top cover 22 and the top of the outer cylinder 12.

[0035] The pressure relief mechanism 3 is installed on the outer cylinder 12 and includes a hollow bolt 31 and a rubber ball 32. The hollow bolt 31 has an oil discharge hole that passes through and connects the inside and outside of the outer cylinder 12. The hollow bolt 31 has a raised portion in the middle of the oil discharge hole. The rubber ball 32 is installed on the side of the raised portion facing the inside of the outer cylinder 12.

[0036] Wherein, hydraulic oil is provided in the cylinder mechanism 1 .

[0037] Through the above structure, when in use, the operator only needs to fill a preset amount of hydraulic oil into the inner cylinder 13 of the cylinder mechanism 1, and set an elastic component 25 of preset strength on the piston rod 23, so that when the buffer pad 21 is not subjected to external force, in a stationary state, the piston 24 is just lifted to a position near the top of the inner cylinder 13, the inner cylinder 13 is filled with a sufficient amount of hydraulic oil, and the elastic component 25 is in a relaxed state. When subjected to external force, the buffer pad 21 is impacted axially downward to drive the piston rod 23 to drive the piston 24 to move downward. Under the action of pressure, the hydraulic oil in the inner cylinder 13 is squeezed out from the throttle hole 131 and poured into the direction of the outer cylinder 12. The elastic component 25 is compressed. In time, the hydraulic oil also gives the piston 24 resistance in the opposite direction to the buffer pad 21, so as to achieve the shock-absorbing and buffering effect of this embodiment. When the external force disappears, the compressed elastic component 25 is free to reset, and drives the top cover 22 to drive a series of components such as the buffer pad 21, the piston rod 23, and the piston 24 to return to their original positions.

[0038] In the above process, taking into account the changes in the on-site conditions, or the operator is unable to accurately inject the preset amount of hydraulic oil, for example, when the volume of hydraulic oil in the cylinder mechanism 1 is excessive, the outer cylinder 12 may be filled with hydraulic oil during the downward movement of the piston 24, but at this time the piston 24 has not yet bottomed out, and the hydraulic oil begins to flow into the oil drain hole of the pressure relief mechanism 3 and exerts force on the rubber ball 32 installed in the oil drain hole, such as Figure 3 As shown, the rubber ball 32 is squeezed out of the oil drain hole, and the oil drain hole of the pressure relief mechanism 3 is in a through state. At this time, a small amount of excess hydraulic oil is squeezed out from the oil drain hole until the hydraulic oil in the cylinder mechanism 1 is in a stable state.

[0039] With the above structure, the excess hydraulic oil is removed by the pressure relief mechanism 3, thus avoiding the damage to the structure of the cylinder mechanism 1 caused by excessive hydraulic oil after being squeezed. At the same time, because the rubber ball 32 is always filled in the position of the hollow bolt 31 when there is no force, the interior of the cylinder mechanism 1 is actually always in a sealed state, thus avoiding the leakage of hydraulic oil in the cylinder mechanism 1 due to transportation and other reasons. In addition, in this embodiment, if Figure 1 As shown, the pressure relief mechanism 3 is installed at the top position of the outer cylinder 12. Since the general oil pressure buffer is generally set as follows Figure 1 As shown in the vertical position, the pressure relief mechanism 3 does not leak oil under normal conditions, that is, the outflow of hydraulic oil during use does not affect the use of the oil pressure buffer of this embodiment.

[0040] Furthermore, the outer oil cylinder 12 has a mounting hole that matches the size of the hollow bolt 31 and is provided for mounting the hollow bolt 31. The inner wall of the mounting hole has an internal thread, and the outer wall of the hollow bolt 31 has an external thread that matches the internal thread, so that the hollow bolt 31 is threadedly connected to the mounting hole. Through the above structure, the pressure relief mechanism 3 in this embodiment can actually be configured as a quick-release structure that is convenient for operators to quickly replace. When the rubber ball 32 is squeezed out, the operator needs to remove the oil pressure buffer of this embodiment for transportation. However, if the operator is worried about the hydraulic oil inside it leaking out of the hollow bolt 31, they can simply unscrew the hollow bolt 31, reinstall the rubber ball 32, and then screw it back in. This makes maintenance convenient and reduces the cost of use.

[0041] Furthermore, the diameter of the oil drain hole of the hollow bolt 31 matches the diameter of the rubber ball 32, allowing the rubber ball 32 to be locked and fixed in the oil drain hole. Specifically, the rubber ball 32 is configured as an elastic sphere with high surface friction. When inserted into the oil drain hole of the hollow bolt 31, the rubber ball 32 slightly deforms, causing it to be clamped by the hollow bolt 31. The raised portion further restricts the sliding of the rubber ball 32. Sufficient hydraulic pressure is required to further deform the rubber ball 32, reducing its diameter to a diameter smaller than the minimum diameter of the raised portion, so that it can be squeezed out of the raised portion and released.

[0042] Furthermore, if Figure 1As shown, the hydraulic damper further includes a monitoring mechanism 4, comprising a trigger rod 41 and a travel switch 42. The trigger rod 41 has a first end and a second end disposed opposite each other. The first end of the trigger rod 41 is connected to the top cover 22, and the second end of the trigger rod 41 is disposed toward the cylinder mechanism 1. The travel switch 42 is fixed to one side of the cylinder mechanism 1. When the hydraulic damper is in a static state, unaffected by external forces, the second end of the trigger rod 41 triggers the travel switch 42. This monitoring mechanism 4 enables full monitoring of the motion state of the transmission mechanism 2. Specifically, in the initial state of the hydraulic damper, unaffected by external forces, the travel switch 42 registers the static state. When the hydraulic damper is subjected to external forces, causing the transmission mechanism 2 to move, the top cover 22 drives the trigger rod 41 downward, separating the travel switch 42 from the trigger rod 41 and registering the current state of pressure. The provision of the monitoring mechanism 4 effectively determines the current motion state of the hydraulic damper, thereby determining whether the hydraulic damper is operating normally.

[0043] Furthermore, a wear ring 26 is provided around the piston 24, and the wear ring 26 contacts the inner wall of the inner cylinder 13. In this embodiment, the wear ring 26 can be filled with polytetrafluoroethylene or other composite materials with good wear resistance, and its main purpose is to play a guiding and sealing role.

[0044] The contents disclosed above are only preferred feasible embodiments of the present invention and do not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made using the contents of the description and drawings of the present invention are included in the scope of the patent application of the present invention.

[0045] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0046] Although the present application has been described through embodiments, those skilled in the art will appreciate that there are many modifications and variations to the present application without departing from the spirit of the present application. It is intended that the appended embodiments include these modifications and variations without departing from the present application.

Claims

1. A hydraulic buffer, characterized in that: The oil pressure buffer comprises: The oil cylinder mechanism includes a base, an outer oil cylinder and an inner oil cylinder. The outer oil cylinder and the inner oil cylinder are mounted on the base, and the outer oil cylinder is sleeved outside the inner oil cylinder. The outer wall of the inner oil cylinder is provided with a throttle hole; A transmission mechanism comprising a buffer pad, a top cover, a piston rod, a piston, and an elastic component, wherein the piston rod has a first end and a second end oppositely disposed, the first end of the piston rod being connected to the top cover, and the second end of the piston rod being connected to the piston, the buffer pad being mounted on a side of the top cover facing away from the piston rod, the piston rod passing through the outer cylinder so that the piston is mounted in the inner cylinder, and the outer diameter of the piston matches the inner diameter of the inner cylinder, and the elastic component being disposed between the top cover and the top of the outer cylinder; A pressure relief mechanism is installed on the outer cylinder and includes a hollow bolt and a rubber ball. The hollow bolt has an oil discharge hole that passes through and connects the inside and outside of the outer cylinder. The hollow bolt has a raised portion in the middle of the oil discharge hole. The rubber ball is installed on the side of the raised portion facing the inside of the outer cylinder. Wherein, hydraulic oil is provided in the oil cylinder mechanism.

2. The oil shock absorber according to claim 1, characterized in that: When the buffer pad is subjected to pressure in the direction of the cylinder mechanism, the piston squeezes the hydraulic oil in the inner cylinder, so that the hydraulic oil is squeezed from the inner cylinder into the outer cylinder through the throttle hole until the hydraulic oil in the outer cylinder is poured into the oil drain hole of the hollow bolt. When the preset pressure is exceeded, the rubber ball undergoes elastic deformation and is squeezed out in the direction away from the outer cylinder, so that the hydraulic oil can flow out from the oil drain hole.

3. The oil shock absorber according to claim 1, characterized in that: The pressure relief mechanism is arranged at the top position of the outer oil cylinder.

4. The oil shock absorber according to claim 1, characterized in that: The outer oil cylinder has a mounting hole that matches the size of the hollow bolt and is used for installing the hollow bolt. The inner wall of the mounting hole has an internal thread, and the outer wall of the hollow bolt has an external thread that matches the internal thread, so that the hollow bolt is threadedly connected to the mounting hole.

5. The oil shock absorber according to claim 1, characterized in that: The diameter of the oil drain hole of the hollow bolt matches the diameter of the rubber ball, so that the rubber ball is fixed in the oil drain hole.

6. The oil shock absorber according to claim 1, characterized in that: The oil pressure buffer also includes a monitoring mechanism, which includes a trigger rod and a travel switch. The trigger rod has a first end and a second end that are arranged opposite to each other. The first end of the trigger rod is connected to the top cover, and the second end of the trigger rod is arranged toward the direction of the cylinder mechanism. The travel switch is fixed on one side of the cylinder mechanism. When the oil pressure buffer is in a static state without being subjected to external force, the second end of the trigger rod triggers the travel switch.

7. The oil shock absorber according to claim 1, characterized in that: A wear-resistant ring is provided on the periphery of the piston, and the wear-resistant ring contacts the inner wall of the inner oil cylinder.

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