Hydraulic brake base and operating table

Abstract

The utility model relates to a hydraulic brake type base and operating table, hydraulic brake type base includes base body, four brake feet, oil tank, hydraulic pump, oil distribution block, first solenoid valve, second solen electromagnetic valve, first pressure sensor, second pressure sensor and a plurality of oil pipeline, and the base body is equipped with hydraulic cylinder fixed plate, hydraulic cylinder and locking piece at four inside corners, and the one end of hydraulic cylinder output thrust is connected brake foot, and first solenoid valve controls and connects the oil pipeline of hydraulic cylinder of three brake feet corresponding, second solenoid valve controls and connects the oil pipeline of hydraulic cylinder of fourth brake foot corresponding, the utility model discloses the brake foot of base divides into two groups and is equipped with the solenoid valve of corresponding control oil pipeline conduction, and each brake foot is equipped with corresponding hydraulic pressure adjusting compensation device, and the stability adjustment of base is conveniently and reliably realized through the stage regulation of two groups of brake feet.

Description

Technical Field

[0001] This utility model belongs to the technical field of operating tables and their components, specifically relating to a hydraulic brake base and an operating table. Background Technology

[0002] Traditional operating tables typically employ pneumatic or hydraulic braking systems, mostly designed to directly drive and adjust the height of multiple casters on the table base, while the brake feet are usually fixed. When locking the operating table, the casters are adjusted to lift them off the ground, and the brake feet on the base provide support, achieving a locking mechanism. When moving the operating table, the casters are adjusted in the opposite direction, lowering them to contact the ground. The brake feet rise with the base, lifting off the ground, allowing the casters to move freely and the operating table to move. This method, where the brake feet are fixed and braking is achieved by adjusting the casters, cannot monitor the brake feet's contact with the ground in real time during adjustment, thus compromising the stability of the base adjustment.

[0003] In addition, most common operating table braking systems on the market use a single pressure source to drive multiple cylinders and control multiple casters at the same time. Moreover, the brake feet do not have a height compensation design. When the ground is uneven, it is impossible to adjust and control according to the pressure of individual cylinders, which will cause the brake feet to be suspended in the air and reduce the stability of the operating table. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model proposes a hydraulic brake-type base and operating table. The base has two sets of brake feet, each equipped with a corresponding solenoid valve for controlling the flow of oil supply lines. Each brake foot is also equipped with a corresponding hydraulic adjustment and compensation device, which allows for convenient and reliable adjustment of the base's stability by adjusting the two sets of brake feet in stages.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] A hydraulic brake base includes a base body, four brake feet, an oil tank, a hydraulic pump, an oil distribution block, a first solenoid valve, a second solenoid valve, and several oil delivery pipelines.

[0007] The base body is provided with hydraulic cylinder fixing plates, hydraulic cylinders and locking components at the four inner corners. The hydraulic cylinder fixing plates are parallel to the bottom of the base body. One end of the oil inlet of the hydraulic cylinder is installed on the hydraulic cylinder fixing plate through the locking component. The end of the hydraulic cylinder that outputs thrust is connected to the brake foot.

[0008] The oil inlet of the hydraulic pump is connected to the oil outlet of the oil tank. The oil outlet of the hydraulic pump is connected to the oil inlet of the oil distribution block through an oil supply pipeline. The oil outlet of the oil distribution block is provided with a first oil outlet branch and a second oil outlet branch. The first oil outlet branch is connected to the input port of the first solenoid valve through an oil supply pipeline, and the second oil outlet branch is connected to the input port of the second solenoid valve through an oil supply pipeline.

[0009] The output port of the first solenoid valve is connected to the oil inlet of the hydraulic cylinder corresponding to the three brake feet through an oil supply pipeline; the output port of the second solenoid valve is connected to the oil inlet of the hydraulic cylinder corresponding to the fourth brake foot through an oil supply pipeline; a first pressure sensor is installed on the oil supply pipeline connected to the output port of the first solenoid valve, and a second pressure sensor is installed on the oil supply pipeline connected to the output port of the second solenoid valve.

[0010] Preferably, the hydraulic cylinder is a hydraulic spring cylinder, which also serves as a brake foot.

[0011] Preferably, the bottom outer wall of the hydraulic spring cylinder is provided with a foot pad.

[0012] Preferably, the hydraulic spring cylinder includes a cylinder barrel, a guide sleeve, a piston rod, a piston, a spacer, a dustproof sealing ring, and a spring. The bottom of the cylinder barrel is closed, the guide sleeve is fitted onto the cylinder barrel and its upper end covers the top opening of the cylinder barrel, one end of the piston rod extends into the interior of the cylinder barrel, and the other end passes through the guide sleeve to extend to the exterior of the cylinder barrel and is fixed to the hydraulic cylinder fixing plate. A dustproof sealing ring is provided between the outer walls of the guide sleeve and the piston rod.

[0013] The piston is fitted inside the cylinder, dividing the cylinder into a rod chamber and a rodless chamber. The bottom end of the piston rod is fixedly connected to the piston by a screw. The piston rod has a hydraulic oil channel inside, and the top and bottom ends of the piston rod are respectively provided with an oil inlet and an oil outlet that communicate with the hydraulic oil channel. A spacer is fitted onto the piston rod and is located below the guide sleeve. A spring is fitted onto the outside of the piston rod, with its first end connected to the bottom of the spacer and its second end connected to the piston.

[0014] Preferably, the hydraulic cylinder fixing plate has a through hole in the center, and the locking component includes a nut. The top end of the piston rod passes through the through hole of the hydraulic cylinder fixing plate and is connected to the corresponding oil supply line through a hinged pipe joint. The nut locks the piston rod on the hydraulic cylinder fixing plate.

[0015] Preferably, the base body is provided with multiple casters at its bottom.

[0016] An operating table is provided with the aforementioned hydraulic brake base.

[0017] By adopting the above technical solution, this utility model has the following technical effects:

[0018] This utility model proposes a hydraulic brake-type base, in which each brake foot is equipped with a height compensation device with hydraulic adjustment, and the four brake feet are divided into two groups and equipped with corresponding solenoid valves for controlling the oil supply line. One group includes three brake feet, and the other group includes one brake foot, which facilitates the sequential adjustment of the two groups of brake feet. That is, a plane is first determined by the three brake feet of the first group. Since the second group of brake feet has only one brake foot, the position of the brake foot of the second group can be adjusted to make the brake foot coplanar with the determined plane, thus more conveniently achieving the adjustment of the base stability.

[0019] 2) The hydraulic brake base proposed in this utility model can infer the contact state between the brake foot and the ground by real-time detection of the pressure of the oil pipeline during the adjustment process, resulting in a more precise adjustment effect.

[0020] 3) The hydraulic brake base proposed in this utility model can be modularly integrated into the chassis of an existing operating table without major changes to the structural design. Attached Figure Description

[0021] Figure 1 This is a perspective view of a hydraulic brake-type base proposed in this utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the base body after it has been concealed.

[0023] Figure 3 Figure 1 A 3D view of the hydraulic cylinder in its installation state;

[0024] Figure 4 for Figure 3 A longitudinal sectional view;

[0025] Figure 5 This is a schematic diagram of the hydraulic brake base with casters proposed in this utility model.

[0026] The components include: 1. Base body; 2. Oil tank; 3. Hydraulic pump; 4. Oil distribution block; 5. First solenoid valve; 6. Second solenoid valve; 7. Hydraulic cylinder fixing plate; 8. Hydraulic cylinder; 9. First pressure sensor; 10. Second pressure sensor; 11. Caster; 12. Nut; 80. Foot pad; 81. Cylinder barrel; 82. Guide sleeve; 83. Piston rod; 84. Piston; 85. Spacer; 86. Dustproof sealing ring; 87. Spring; 831. Hydraulic oil passage; 832. Oil inlet. Detailed Implementation

[0027] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0028] Example 1

[0029] like Figure 1 and Figure 2 As shown, this embodiment proposes a hydraulic brake-type base, including: a base body 1, an oil tank 2, a hydraulic pump 3, an oil distribution block 4, a first solenoid valve 5, a second solenoid valve 6, and several oil supply pipelines. The oil tank 2, hydraulic pump 3, oil distribution block 4, first solenoid valve 5, and second solenoid valve 6 are all provided with corresponding oil inlets and outlets. In this utility model, the connecting pipelines between the oil inlets and outlets of the equipment are referred to as oil supply pipelines. The first solenoid valve 5 and the second solenoid valve 6 utilize two solenoid valves from a three-way solenoid valve group.

[0030] The base body 1 has hydraulic cylinder fixing plates 7, hydraulic cylinders 8, and locking components at its four inner corners. The hydraulic cylinder fixing plates 7 are parallel to the bottom of the base body 1. One end of the oil inlet of the hydraulic cylinder 8 is mounted on the hydraulic cylinder fixing plate 7 via the locking components, and the end of the hydraulic cylinder 8 that outputs thrust is connected to the brake foot. In this embodiment, the hydraulic cylinder 8 serves as both the brake foot and the brake foot height adjustment compensation device. The four hydraulic cylinders 8 are preferably hydraulic spring cylinders of the same specification, and are respectively designated as the first spring cylinder, the second spring cylinder, the third spring cylinder, and the fourth spring cylinder.

[0031] The oil outlet of the hydraulic pump 3 is connected to the oil inlet of the oil distribution block 4 through an oil supply pipeline. The oil distribution block 4 is provided with a first oil outlet branch and a second oil outlet branch. The first oil outlet branch is connected to the input port of the first solenoid valve 5 through an oil supply pipeline, and the second oil outlet branch is connected to the input port of the second solenoid valve 6 through an oil supply pipeline.

[0032] The output port of the first solenoid valve 5 is connected to the inlet ports of three hydraulic cylinders 8 via an adapter and an oil supply line. The hydraulic oil pumped into the distributor block 4 is divided into two paths before being output. One path passes through the first solenoid valve 5 and is further divided into three paths, supplying the first, second, and third spring cylinders respectively. The other path passes through the second solenoid valve 6 and supplies the fourth spring cylinder. A first pressure sensor 9 is installed on the oil supply line connected to the output port of the first solenoid valve 5, and a second pressure sensor 10 is installed on the oil supply line connected to the output port of the second solenoid valve 6.

[0033] like Figure 3 and Figure 4As shown, the hydraulic cylinder fixing plate 7 has a through hole in the center, and the locking component includes a nut 12. The top end of the piston rod 83 of the hydraulic spring cylinder passes through the through hole of the hydraulic cylinder fixing plate 7 and is connected to the corresponding oil supply line through a hinged pipe joint. The nut 12 locks the piston rod 83 on the hydraulic cylinder fixing plate 7.

[0034] The hydraulic spring cylinder includes a cylinder barrel 81, a guide sleeve 82, a piston rod 83, a piston 84, a spacer 85, a dustproof sealing ring 86, and a spring 87. The bottom of the cylinder barrel 81 is closed. The guide sleeve 82 is fitted onto the cylinder barrel 81 and its upper end covers the top opening of the cylinder barrel 81. One end of the piston rod 83 extends into the interior of the cylinder barrel 81, and the other end passes through the guide sleeve 82 to extend to the exterior of the cylinder barrel 81 and is fixed to the hydraulic cylinder fixing plate 7. A dustproof sealing ring 86 is provided between the outer walls of the guide sleeve 82 and the piston rod 83. Piston 84 is fitted inside cylinder 81, dividing the interior of cylinder 81 into a rod chamber and a rodless chamber. The bottom end of piston rod 83 is fixedly connected to piston 84 by screws. A hydraulic oil passage 831 is provided inside piston rod 83. The top and bottom ends of piston rod 83 are respectively provided with an oil inlet 832 and an oil outlet communicating with the hydraulic oil passage 831. Spacer 85 is fitted onto piston rod 83 and located below guide sleeve 82. Spring 87 is fitted onto the outside of piston rod 83, with its first end connected to the bottom of spacer 85 and its second end connected to piston 84. A through hole is provided in the center of hydraulic cylinder fixing plate 7. Locking components include nut 12. The top end of piston rod 83 passes through the through hole of hydraulic cylinder fixing plate 7 and is connected to the corresponding oil supply line via a hinged pipe joint. Nut 12 locks piston rod 83 onto hydraulic cylinder fixing plate 7.

[0035] Hydraulic pump 3 achieves segmented control of the four hydraulic cylinders 8 through first solenoid valve 5 and second solenoid valve 6. Furthermore, it monitors the real-time pressure of the oil supply pipeline through first pressure sensor 9 and second pressure sensor 10, controlling the opening and closing of first solenoid valve 5 and second solenoid valve 6 in a timely manner to achieve stable braking of the chassis and prevent brake failure caused by excessive or insufficient pressure. The control principle is described as follows:

[0036] Start hydraulic pump 3. Hydraulic pump 3 pumps the hydraulic oil in oil tank 2 into oil distributor 4. Oil distributor 4 outputs two hydraulic oil streams.

[0037] When the first solenoid valve 5 is opened, the three oil supply lines connecting the first, second, and third spring cylinders are connected. The first, second, and third spring cylinders open, and the corresponding piston rods 83 extend. When the bottom of the cylinder 81 / foot pad 80 touches the ground, the pressure begins to rise. The oil supply lines of the first, second, and third spring cylinders are connected. After the first pressure sensor 9 detects that the oil supply line has reached the pressure threshold, it controls the first solenoid valve 5 to close, and the first, second, and third spring cylinders stop. The three points determine a plane. Through the measured pressure value, it can be known that the three brake feet are on the same plane.

[0038] Then, the second solenoid valve 6 is opened, connecting the oil supply line to the fourth spring cylinder. The fourth spring cylinder opens, and the corresponding piston rod 83 extends. When the bottom of the cylinder 81 / foot pad 80 touches the ground, the pressure begins to rise. After the second pressure sensor 10 detects that the oil supply line has reached the pressure threshold, it controls the second solenoid valve 6 to close, and the fourth spring cylinder stops, completing the braking.

[0039] When it is necessary to release the brake pedal, the corresponding first solenoid valve 5 or second solenoid valve 6 is closed, and the spring cylinder quickly resets after the action of the spring 87, and the cylinder 81 is raised and lifted off the ground.

[0040] The pressure threshold is set based on actual measurement results. The standard is that under this pressure threshold, by adjusting the extension length of the fourth spring cylinder, the base can be leveled without the first to third spring cylinders leaving the ground. After braking, all four spring cylinders, i.e., the four brake feet, are in full contact with the ground, thus improving the stability of the base. The hydraulic pump 3 is an electric hydraulic pump, which, along with the first solenoid valve 5 and the second solenoid valve 6, can be centrally controlled by a unified controller to achieve automatic adjustment of the base's stability. Moreover, the system only requires two solenoid valves, resulting in simple control logic, low cost, and low failure rate. Furthermore, a one-button emergency unlocking function can be added, allowing for rapid release of all brake feet in emergency situations, ensuring the operating table can be quickly moved. This involves simultaneously closing both solenoid valves, raising the cylinders 81 of all four spring cylinders simultaneously, and releasing the brakes.

[0041] Another embodiment of this utility model proposes an operating table, such as... Figure 5 As shown, it is equipped with the hydraulic brake base described in Embodiment 1. Multiple casters 11 can also be installed at the bottom of the base body 1, and the casters 11 can be fixed. The stability of the operating table can be achieved by adjusting the four brake feet.

[0042] It should be noted that the brake foot of this utility model is not limited to being implemented using a hydraulic cylinder 8. It can also be implemented using a hydraulic cylinder to drive a separately configured brake foot, with the brake foot perpendicular to the bottom of the base body 1. The hydraulic cylinder is installed in reverse, and the brake foot is fixedly installed at the output end of the cylinder rod. Furthermore, the oil tank 2, hydraulic pump 3, oil distributor 4, first solenoid valve 5, and second solenoid valve 6 are all equipped with return oil ports. Corresponding return oil pipelines are formed between the oil tank 2 and hydraulic pump 3, between the hydraulic pump 3 and oil distributor 4, between oil distributor 4 and the first solenoid valve 5, and between oil distributor 4 and the second solenoid valve 6, all connected by return oil ports and connecting pipes. These details will not be elaborated further here.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technology to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A hydraulic brake type base, characterized in that: It includes a base body (1), four brake feet, an oil tank (2), a hydraulic pump (3), an oil distribution block (4), a first solenoid valve (5), a second solenoid valve (6), and several oil pipelines; The base body (1) is provided with a hydraulic cylinder fixing plate (7), a hydraulic cylinder (8) and a locking component at the four inner corners. The hydraulic cylinder fixing plate (7) is parallel to the bottom of the base body (1). One end of the oil inlet of the hydraulic cylinder (8) is installed on the hydraulic cylinder fixing plate (7) through the locking component. The end of the hydraulic cylinder (8) that outputs thrust is connected to the brake foot. The inlet of the hydraulic pump (3) is connected to the outlet of the oil tank (2). The outlet of the hydraulic pump (3) is connected to the inlet of the oil distribution block (4) through the oil supply pipeline. The outlet of the oil distribution block (4) is provided with a first oil outlet branch and a second oil outlet branch. The first oil outlet branch is connected to the input port of the first solenoid valve (5) through the oil supply pipeline. The second oil outlet branch is connected to the input port of the second solenoid valve (6) through the oil supply pipeline. The output port of the first solenoid valve (5) is connected to the oil inlet of the hydraulic cylinder (8) corresponding to the three brake feet through the oil supply pipeline; the output port of the second solenoid valve (6) is connected to the oil inlet of the hydraulic cylinder (8) corresponding to the fourth brake foot through the oil supply pipeline; a first pressure sensor (9) is installed on the oil supply pipeline connected to the output port of the first solenoid valve (5), and a second pressure sensor (10) is installed on the oil supply pipeline connected to the output port of the second solenoid valve (6).

2. The hydraulic brake base according to claim 1, characterized in that: The hydraulic cylinder (8) is a hydraulic spring cylinder, which also serves as a brake foot.

3. The hydraulic brake base according to claim 2, characterized in that: The bottom outer wall of the hydraulic spring cylinder is provided with a foot pad (80).

4. The hydraulic brake base according to claim 2, characterized in that: The hydraulic spring cylinder includes a cylinder (81), a guide sleeve (82), a piston rod (83), a piston (84), a spacer (85), a dustproof sealing ring (86), and a spring (87). The bottom of the cylinder (81) is closed. The guide sleeve (82) is fitted onto the cylinder (81) and its upper end covers the top opening of the cylinder (81). One end of the piston rod (83) extends into the interior of the cylinder (81), and the other end passes through the guide sleeve (82) to the exterior of the cylinder (81) and is fixed on the hydraulic cylinder fixing plate (7). A dustproof sealing ring (86) is provided between the outer walls of the guide sleeve (82) and the piston rod (83). The piston (84) is fitted inside the cylinder (81), dividing the inside of the cylinder (81) into a rod chamber and a rodless chamber. The bottom end of the piston rod (83) is fixedly connected to the piston (84) by screws. The piston rod (83) has a hydraulic oil passage (831) inside. The top and bottom ends of the piston rod (83) are respectively provided with an oil inlet (832) and an oil outlet that communicate with the hydraulic oil passage (831). The spacer (85) is fitted on the piston rod (83) and located below the guide sleeve (82). The spring (87) is fitted on the outside of the piston rod (83), with its first end connected to the bottom of the spacer (85) and its second end connected to the piston (84).

5. The hydraulic brake base according to claim 4, characterized in that: The hydraulic cylinder fixing plate (7) has a through hole in the center. The locking component includes a nut (12). The top end of the piston rod (83) passes through the through hole of the hydraulic cylinder fixing plate (7) and is connected to the corresponding oil pipeline through a hinged pipe joint. The nut (12) locks the piston rod (83) on the hydraulic cylinder fixing plate (7).

6. The hydraulic brake base according to claim 1, characterized in that: The base body (1) is provided with multiple casters (11) at its bottom.

7. An operating table, characterized in that: It is equipped with a hydraulic brake type base as described in any one of claims 1-5.

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