Water jet equipment piston box with elastic piston rod

Abstract

The utility model provides a water jet scalpel equipment piston box with an elastic piston rod, and relates to the technical field of medical instruments. According to the piston box, an elastic piston rod assembly is driven by an eccentric rotating assembly to do reciprocating motion in the axial direction, the elastic piston rod assembly buffers pressure borne by a piston rod when the piston rod compresses liquid by installing a spring between a front push rod and a rear push rod which are split, and the separation limit of the front push rod and the rear push rod is limited through a screw. It is guaranteed that the rear push rod can be driven to reset when the front push rod is pulled back, non-rigid transmission of loads is achieved, and the vibration and noise problems of the piston box are remarkably relieved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a piston box for a water jet device with an elastic piston rod. Background Technology

[0002] Currently, the high-pressure power source for water jet surgery comes from a reciprocating piston box. A motor drives a cam to rotate via a pulley or coupling, and the cam eccentrically pushes the piston rod to achieve reciprocating motion. However, when the piston rod pushes forward, it compresses the liquid inside the cylindrical pump barrel and forces the liquid into the high-pressure outlet pipe, the pressure typically reaches tens or even hundreds of megapascals. The piston rod generally needs to transmit hundreds of kilograms of force, and the frequency is usually as high as 1200Hz. This causes the high-frequency rigid transmission of the piston rod force to the camshaft, bearings, and the entire piston box, resulting in high-decibel vibrations similar to those of an engine. The noise is very loud and significantly affects the surgical procedure. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a piston box for a waterjet cutting device with an elastic piston rod, which solves the problem of high-decibel vibration and noise in the piston box of the waterjet cutting device.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A piston box for a waterjet cutting device with an elastic piston rod, the piston box comprising: an elastic piston rod assembly, an eccentric rotation assembly, and a box body assembly;

[0006] The elastic piston rod assembly includes: a front push rod, a rear push rod, and a spring;

[0007] The front push rod has a radially outwardly extending front limiting plate on its body, and the front push rod has a shaft hole with a countersunk hole at the front end of the shaft hole.

[0008] The rear push rod has a radially outwardly extending rear limiting plate, and the front end of the rear push rod has a threaded hole.

[0009] The front section of the rear push rod is axially slidably connected to the shaft hole. The rear push rod and the front push rod are limited to their separation limits by screws. The head of the screw is accommodated in the countersunk hole, and the screw shank is threadedly connected to the threaded hole.

[0010] The spring is located between the front limiting plate and the rear limiting plate;

[0011] The front end of the push rod is hinged to the eccentric rotating assembly; the elastic piston rod assembly and the eccentric rotating assembly are installed inside the housing assembly.

[0012] Preferably, the enclosure assembly includes: an enclosure, a first enclosure lid, and a second enclosure lid;

[0013] The first box cover is connected to the side opening flange of the box body, and the second box cover is connected to the rear opening flange of the box body;

[0014] The first box cover has a first through hole, and the second box cover has a second through hole.

[0015] Preferably, the eccentric rotating assembly includes: a camshaft and a transmission ring;

[0016] The cam of the camshaft is connected to the transmission ring bearing via a cam bearing, and the transmission ring is hinged to the front end of the push rod.

[0017] Preferably, the shafts on both sides of the camshaft are connected to the housing assembly bearings via support bearings.

[0018] Preferably, the support bearings on both sides of the camshaft are respectively embedded in the first cover and the housing; a first oil seal is installed in the first through hole, and the camshaft shaft passes through the first oil seal to connect to the drive source.

[0019] Preferably, a second oil seal is installed in the second through hole, and the rear section of the push rod passes through the second oil seal to connect to the piston.

[0020] Preferably, a front guide sleeve and a rear guide sleeve are installed inside the housing, the front section of the front push rod is slidably connected to the front guide sleeve, and the rear section of the rear push rod is slidably connected to the rear guide sleeve.

[0021] Preferably, the spring is a high-load spring.

[0022] This invention provides a piston box for a waterjet cutting device with an elastic piston rod. Compared with the prior art, it has the following advantages:

[0023] In this invention, the piston box includes an elastic piston rod assembly that is driven to reciprocate axially by an eccentric rotating component. The elastic piston rod assembly buffers the pressure borne by the piston rod when compressing liquid by installing a spring between the split front push rod and the rear push rod. The front push rod and the rear push rod are separated by screws to ensure that the rear push rod can be reset when the front push rod is pulled back. This achieves non-rigid load transmission and significantly alleviates the vibration and noise problems of the piston box. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1This is a schematic diagram of the internal structure of the piston box in an embodiment of this utility model.

[0026] Figure 2 This is an exploded isometric view of the piston box in an embodiment of this utility model.

[0027] Figure 3 This is an exploded isometric view of the piston box from another angle in an embodiment of this utility model.

[0028] Figure 4 This is an exploded isometric view of the elastic piston rod assembly in an embodiment of this utility model.

[0029] Figure 5 This is an exploded isometric view of the elastic piston rod assembly from another angle in an embodiment of this utility model.

[0030] Figure 6 This is an isometric view of the piston box in an embodiment of this utility model.

[0031] The reference numerals in the figure are set as follows: front push rod 10, front limit plate 11, shaft hole 12, countersunk hole 13, rear push rod 20, rear limit plate 21, threaded hole 22, spring 30, camshaft 40, cam bearing 41, support bearing 42, transmission ring 50, housing 60, front guide sleeve 61, rear guide sleeve 62, first housing cover 70, first through hole 71, first oil seal 72, second housing cover 80, second through hole 81, second oil seal 82. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] This application provides a piston box for a waterjet cutting device with an elastic piston rod, which solves the problem of high decibel vibration noise in the piston box of the waterjet cutting device.

[0034] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0035] Example:

[0036] like Figures 1-6 As shown, this utility model provides a piston box for a water jet device with an elastic piston rod. The piston box includes: an elastic piston rod assembly, an eccentric rotation assembly, and a box body assembly.

[0037] The elastic piston rod assembly includes: a front push rod 10, a rear push rod 20, and a spring 30;

[0038] The front push rod 10 has a radially outwardly extending front limiting plate 11 on its body, and the front push rod 10 has a shaft hole 12, with a countersunk hole 13 at the front end of the shaft hole 12.

[0039] The rear push rod 20 has a radially outwardly extending rear limiting plate 21 on its body, and a threaded hole 22 is provided at the front end of the rear push rod 20.

[0040] The front section of the rear push rod 20 is axially slidably connected to the shaft hole 12. The rear push rod 20 and the front push rod 10 are limited to the limit of separation by screws. The head of the screw is accommodated in the countersunk hole 13, and the screw is threadedly connected to the threaded hole 22.

[0041] The spring 30 is located between the front limiting plate 11 and the rear limiting plate 21;

[0042] The front end of the front push rod 10 is hinged to the eccentric rotating assembly; the elastic piston rod assembly and the eccentric rotating assembly are installed inside the housing assembly.

[0043] like Figures 1-3 As shown, the eccentric rotating assembly includes: a camshaft 40 and a transmission ring 50;

[0044] The cam of the camshaft 40 is connected to the transmission ring 50 bearing through the cam bearing 41, and the transmission ring 50 is hinged to the front end of the front push rod 10.

[0045] like Figures 1-3 As shown, the shafts on both sides of the camshaft 40 are connected to the housing assembly bearings via support bearings 42.

[0046] like Figures 1-3 As shown, the box assembly includes: a box body 60, a first box cover 70, and a second box cover 80;

[0047] The first box cover 70 is connected to the side opening flange of the box body 60, and the second box cover 80 is connected to the rear opening flange of the box body 60.

[0048] The first box cover 70 has a first through hole 71, and the second box cover 80 has a second through hole 81.

[0049] like Figures 1-3 As shown, the support bearings 42 on both sides of the camshaft 40 are respectively embedded in the first cover 70 and the housing 60; a first oil seal 72 is installed in the first through hole 71, and the shaft of the camshaft 40 passes through the first oil seal 72 to connect to the drive source, which is used to drive the camshaft 40 to rotate.

[0050] like Figures 1-3As shown, a second oil seal 82 is installed in the second through hole 81, and the rear section of the push rod 20 passes through the second oil seal 82 to connect to the piston, which is used to drive the piston to perform axial reciprocating motion.

[0051] like Figures 1-5 As shown, a front guide sleeve 61 and a rear guide sleeve 62 are installed inside the housing 60. The front section of the front push rod 10 is slidably connected to the front guide sleeve 61, and the rear section of the rear push rod 20 is slidably connected to the rear guide sleeve 62.

[0052] The spring 30 is a high-load spring.

[0053] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0054] In this embodiment of the invention, the piston box includes an elastic piston rod assembly that is driven to reciprocate axially by an eccentric rotating component. The elastic piston rod assembly buffers the pressure borne by the piston rod when compressing liquid by installing a spring 30 between the split front push rod 10 and the rear push rod 20. The separation limit between the front push rod 10 and the rear push rod 20 is limited by screws, ensuring that the rear push rod 20 can be reset when the front push rod 10 is pulled back. This achieves non-rigid load transmission and significantly alleviates the vibration and noise problems of the piston box.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0056] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A piston box for a waterjet cutting device with an elastic piston rod, characterized in that, The piston box includes: an elastic piston rod assembly, an eccentric rotation assembly, and a box assembly; The elastic piston rod assembly includes: a front push rod (10), a rear push rod (20), and a spring (30). The front push rod (10) has a radially outwardly extending front limiting plate (11) on its body, and the front push rod (10) has a shaft hole (12) and a countersunk hole (13) at the front end of the shaft hole (12). The rear push rod (20) has a radially outwardly extending rear limiting plate (21) on its body, and a threaded hole (22) is provided at the front end of the rear push rod (20). The front section of the rear push rod (20) is axially slidably connected to the shaft hole (12). The rear push rod (20) and the front push rod (10) are limited to the limit of separation by screws. The head of the screw is accommodated in the countersunk hole (13), and the screw is threadedly connected to the threaded hole (22). The spring (30) is located between the front limiting plate (11) and the rear limiting plate (21); The front end of the front push rod (10) is hinged to the eccentric rotating assembly; the elastic piston rod assembly and the eccentric rotating assembly are installed inside the housing assembly.

2. The piston box of the waterjet equipment with an elastic piston rod as described in claim 1, characterized in that, The enclosure assembly includes: an enclosure (60), a first enclosure cover (70), and a second enclosure cover (80); The first box cover (70) is connected to the side opening flange of the box body (60), and the second box cover (80) is connected to the rear opening flange of the box body (60). The first box cover (70) has a first through hole (71), and the second box cover (80) has a second through hole (81).

3. The piston box of the waterjet equipment with an elastic piston rod as described in claim 2, characterized in that, The eccentric rotating assembly includes: a camshaft (40) and a transmission ring (50); The cam of the camshaft (40) is connected to the transmission ring (50) bearing through the cam bearing (41), and the transmission ring (50) is hinged to the front end of the push rod (10).

4. The piston box of the waterjet equipment with an elastic piston rod as described in claim 3, characterized in that, The shafts on both sides of the camshaft (40) are connected to the housing assembly bearings via support bearings (42).

5. The piston box of the waterjet equipment with an elastic piston rod as described in claim 4, characterized in that, The support bearings (42) on both sides of the camshaft (40) are respectively embedded in the first cover (70) and the housing (60); the first oil seal (72) is installed in the first through hole (71), and the shaft of the camshaft (40) passes through the first oil seal (72) to connect to the drive source.

6. The piston box of the waterjet equipment with an elastic piston rod as described in claim 2, characterized in that, A second oil seal (82) is installed in the second through hole (81), and the rear section of the push rod (20) passes through the second oil seal (82) to connect to the piston.

7. The piston box of the waterjet equipment with an elastic piston rod as described in claim 2, characterized in that, The housing (60) is equipped with a front guide sleeve (61) and a rear guide sleeve (62). The front section of the front push rod (10) is slidably connected to the front guide sleeve (61), and the rear section of the rear push rod (20) is slidably connected to the rear guide sleeve (62).

8. The piston box of the waterjet equipment with an elastic piston rod as described in any one of claims 1-7, characterized in that, The spring (30) is a high-load spring.

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