Connecting structure of main shaft and plunger for inclined shaft type plunger motor
By using copper-based center slide boots and spiral-circle slide boots in the oblique shaft plunger motor to connect with the steel center link and plunger, the problems of severe wear and high replacement cost in the prior art are solved, and the effect of lower replacement cost and higher equipment reliability is achieved.
Patent Information
- Application Number
- CN202422160291.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-03
AI Technical Summary
In existing oblique shaft plunger motors, the ball pin connections of the central connecting rod, plunger and spindle are prone to wear, resulting in reduced performance, increased heat and noise, and high replacement costs.
The center slide boots and elbow ring slide boots are connected to the center link and plunger made of steel. By setting the replaceable center slide boots and elbow ring slide boots, the risk of wear is reduced, and only the sliding boots are replaced after wear to reduce replacement cost.
It realizes a diagonal shaft plunger motor connection structure with lower replacement costs, reducing wear risks and maintenance costs, and improving the service life and reliability of the equipment.
Smart Images
Figure CN223136309U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of plunger motors, and more specifically to a connection structure between a main shaft and a plunger for a bent-axis plunger motor. Background Art
[0002] The plunger motor is a type of hydraulic motor. The working medium acts on the end face of the piston or plunger, causing the piston or plunger to perform linear reciprocating motion. The reciprocating motion of the piston or plunger is then converted into circular motion of the output shaft through a motion conversion mechanism. The inclined axis plunger motor means that the output spindle and the plunger are arranged at an angle.
[0003] There is a kind of inclined axis piston motor, such as Figure 1 and Figure 2 As shown, it includes a main shaft 90, a central connecting rod 91, a plurality of plungers 92, a cylinder body 93, an oil distribution plate 94, a shell 95 and a pressure plate 96. The main shaft 90 and the cylinder body 93 are rotatably mounted on the shell 95. The end of the main shaft 90 away from the cylinder body 93 has an oil outlet channel 901. One end of the central connecting rod 91 is mounted on the cylinder body 93. The other end of the central connecting rod 91 is rotatably and swingably mounted on the end of the main shaft 90 close to the cylinder body 93 through a ball pin connection. The plunger 92 is arranged in an annular shape on the central connecting rod 91. On the outside, one end of the plunger 92 is slidably arranged on the cylinder body 93, and the other end of the plunger 92 is rotatably and swingably mounted on the main shaft 90 by means of a ball pin connection. The housing 95 has an oil inlet channel (not shown in the figure), and the oil distribution plate 94 has a plurality of flow holes (not shown in the figure), which are connected to the main shaft 90 through the pressure plate 96 to prevent the ball pin from falling out. When the hydraulic oil flows into the internal chamber of the cylinder body 93 and causes the plunger 92 to reciprocate, the main shaft 90 rotates circumferentially. The main shaft 90, the center connecting rod 91 and the plunger 92 are all made of steel. However, since the center connecting rod 91, the plunger 92 and the main shaft 90 are connected by a ball pin, and the main shaft 90, the center connecting rod 91 and the plunger 92 are all made of steel, after the inclined axis plunger 92 motor has been working for a period of time, the center connecting rod 91, the ball pins on the plunger 92 and the ball grooves on the main shaft 90 are severely worn, which can easily lead to a decline in product performance, serious heat generation and increased noise. Replacement requires the entire replacement of the main shaft 90, the center connecting rod 91 and the plunger 92, and the replacement cost is relatively high.
[0004] Therefore, there is a need to provide a connection structure between a main shaft and a plunger for a helical axis plunger motor with lower replacement cost. Utility Model Content
[0005] The main purpose of this application is to provide a connection structure between the main shaft and the plunger for an inclined - axis piston motor, which is provided on the inclined - axis piston motor. Among them, the connection structure between the main shaft and the plunger for the inclined - axis piston motor includes a main shaft, a central assembly, and several collar assemblies. One end of the main shaft has a disk portion, the disk portion has a first blind hole and several second blind holes, the second blind holes are arranged in a ring shape and are located outside the first blind hole. The central assembly includes a central slipper and a central connecting rod. The central slipper is placed in the first blind hole, and one end of the central connecting rod is rotatably and swingably installed on the central slipper. Each collar assembly includes a collar slipper and a plunger. Each second blind hole is provided with a collar slipper, and one end of each plunger is rotatably and swingably installed on the corresponding collar slipper. By providing replaceable central slippers and collar slippers, the central slippers and collar slippers can be replaced when worn. Compared with the prior art, it has the advantage of lower replacement cost.
[0006] Another purpose of this application is to provide a connection structure between the main shaft and the plunger for an inclined - axis piston motor. Among them, the materials of the central slipper and each collar slipper are both copper, and the materials of the central connecting rod and the plunger are both steel. By making the wear resistance of the central slipper and the collar pulley lower than that of the central connecting rod and the plunger, the wear risk of the central connecting rod and the plunger can be reduced.
[0007] In order to achieve at least one of the above - mentioned invention purposes, this application provides a connection structure between the main shaft and the plunger for an inclined - axis piston motor, which is provided on the inclined - axis piston motor. Among them, the connection structure between the main shaft and the plunger for the inclined - axis piston motor includes:
[0008] A main shaft, one end of the main shaft has a disk portion, the disk portion has a first blind hole and several second blind holes, the second blind holes are arranged in a ring shape and are located outside the first blind hole; and
[0009] A central assembly, the central assembly includes a central slipper and a central connecting rod, the central slipper is placed in the first blind hole, and one end of the central connecting rod is rotatably and swingably installed on the central slipper; and
[0010] Several collar assemblies, each collar assembly includes a collar slipper and a plunger, each second blind hole is provided with a collar slipper, and one end of each plunger is rotatably and swingably installed on the corresponding collar slipper.
[0011] In one or more embodiments of this application, the materials of the central slipper and each collar slipper are both copper, and the materials of the central connecting rod and the plunger are both steel.
[0012] In one or more embodiments of the present application, the maximum radial dimension of the center slipper is greater than the aperture of the first blind hole, the maximum radial dimension of the ring slipper is greater than the aperture of the second blind hole, the center slipper has an interference fit with the first blind hole, and each of the ring slippers has an interference fit with the corresponding second blind hole.
[0013] In one or more embodiments of the present application, the outer side walls of the central sliding shoe and each of the ring sliding shoes have exhaust grooves arranged in a spiral shape.
[0014] In one or more embodiments of the present application, the center slide shoe and the ring slide shoe have a spherical groove at one end facing away from the main shaft, the center connecting rod and each of the plungers have a ball head at one end close to the main shaft, and each of the ball heads is placed in the corresponding spherical groove.
[0015] In one or more embodiments of the present application, the bottom of the spherical groove on each of the ring shoes has a drilling portion, and a magnet is provided at the bottom of the drilling portion.
[0016] In one or more embodiments of the present application, the bottom of the spherical groove on the central sliding shoe has a through hole, the main shaft has a discharge channel, and the through hole is connected to the discharge channel.
[0017] In one or more embodiments of the present application, the side walls of the central sliding shoe and each of the circumferential sliding shoes have a pre-cut groove.
[0018] In an embodiment of the present application, a connecting structure between a main shaft and a plunger for a bevel-axis piston motor comprises a main shaft, a center component and a plurality of ring components, wherein one end of the main shaft has a disk body portion, the disk body portion has a first blind hole and a plurality of second blind holes, the second blind holes are arranged in a ring shape and are located on the outside of the first blind hole, the center component comprises a center slipper and a center connecting rod, the center slipper is placed in the first blind hole, one end of the center connecting rod is rotatably and swingably mounted on the center slipper, each ring component comprises a ring slipper and a plunger, a ring slipper is provided in each second blind hole, and one end of each plunger is rotatably and swingably mounted on the corresponding ring slipper, by providing replaceable center slippers and ring slippers, the center slippers and ring slippers can be replaced when worn, which has the advantage of lower replacement cost compared to the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:
[0020] Figure 1The figure shows a schematic structural diagram of an existing swashplate type piston motor;
[0021] Figure 2 The figure shows Figure 1 a partial enlarged view at position C of
[0022] Figure 3 The figure shows a schematic structural diagram of the connection structure between the main shaft and the piston of a swashplate type piston motor of the present utility model;
[0023] Figure 4 The figure shows Figure 3 a partial enlarged view at position D of
[0024] Figure 5 The figure shows a schematic structural diagram of a center slipper from a certain perspective. Detailed implementation manners
[0025] The terms and words used in the following description and claims are not limited to the literal meanings, but are used only by the inventor to enable a clear and consistent understanding of the present application. Therefore, it is obvious to those skilled in the art that the following description of various embodiments of the present application is provided only for the purpose of illustration and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.
[0026] It can be understood that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in other embodiments, the number of the element can be multiple. The term "a" cannot be understood as a limitation on the number.
[0027] Although ordinal numbers such as "first", "second", etc. will be used to describe various components, those components are not limited herein. The term is only used to distinguish one component from another. For example, the first component can be called the second component, and similarly, the second component can also be called the first component without departing from the teachings of the inventive concept. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.
[0028] The terms used herein are only for the purpose of describing various embodiments and are not intended to be limiting. As used herein, the singular forms are also intended to include the plural forms unless the context clearly indicates otherwise. Additionally, it will be understood that the terms "comprises" and / or "has" when used in this specification specify the presence of the stated features, numbers, steps, operations, components, elements, or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.
[0029] A schematic connection structure between the main shaft and the piston of a swashplate type piston motor, refer to Figures 3 to 5, A connecting structure between the main shaft and the plunger of an inclined - shaft type plunger motor according to a preferred embodiment of the present utility model is provided on an inclined - shaft type plunger motor as shown in Figure 1 shown, as shown in Figure 3 , and includes a main shaft 10, a central assembly 20, and a plurality of ring - shaped assembly 30.
[0030] Specifically, as shown in Figure 3 and Figure 4 , one end of the main shaft 10 has a disk portion 101. The disk portion 101 has a first blind hole 1011 and a plurality of second blind holes 1012. The second blind holes 1012 are arranged in a ring shape and are located outside the first blind hole 1011. In addition, the central assembly 20 includes a central slipper 201 and a central connecting rod 202. The central slipper 201 is placed in the first blind hole 1011, and one end of the central connecting rod 202 is rotatably and swingably mounted on the central slipper 201. In addition, each of the ring - shaped assembly 30 includes a ring - shaped slipper 301 and a plunger 302. Each of the second blind holes 1012 is provided with a ring - shaped slipper 301, and one end of each plunger 302 is rotatably and swingably mounted on the corresponding ring - shaped slipper 301.
[0031] It should be noted that by providing the central slipper 201 and the ring - shaped slipper 301, after the inclined - shaft type plunger 302 motor has been used for a long time, if the central slipper 201 or the ring - shaped slipper 301 is worn, only the central slipper 201 or the ring - shaped slipper 301 needs to be replaced. Obviously, compared with the prior art where the entire main shaft 10 needs to be replaced, the embodiment of the present application has the advantage of lower replacement cost.
[0032] Furthermore, since the replacement cost of the central slipper 201 and the ring - shaped slipper 301 is relatively low after wear, in order to avoid the wear of the central connecting rod 202 that cooperates with the central slipper 201 and the plunger 302 that cooperates with the ring - shaped slipper 301, the materials of the central slipper 201 and each ring - shaped slipper 301 are both copper, and the materials of the central connecting rod 202 and the plunger 302 are both steel.
[0033] It should be noted that since the wear resistance of steel is better than that of copper, after long - term use, only the easily worn central slipper 201 and ring - shaped slipper 301 need to be replaced.
[0034] Further, to fixedly mount the central slide shoe 201 and the annular slide shoe 301 on the disc portion 101, the maximum radial dimension of the central slide shoe 201 is greater than the aperture of the first blind hole 1011, and the maximum radial dimension of the annular slide shoe 301 is greater than the aperture of the second blind hole 1012. The central slide shoe 201 is in interference fit with the first blind hole 1011, and each annular slide shoe 301 is in interference fit with the corresponding second blind hole 1012.
[0035] It should be noted that, to respectively place the central slide shoe 201 and the annular slide shoe 301 into the first blind hole 1011 and the second blind hole 1012, during assembly, the liquid nitrogen cold mounting method is adopted, so that the radial dimensions of the central slide shoe 201 and the annular slide shoe 301 become smaller under the action of low temperature in a short time, so as to be placed into the first blind hole 1011 or the second blind hole 1012, thereby realizing the fixed mounting of the central slide shoe 201 and the annular slide shoe 301 on the disc portion 101.
[0036] Further, to rotatably and swingably mount one end of the central connecting rod 202 on the central slide shoe 201, and rotatably and swingably mount one end of each plunger 302 on the corresponding annular slide shoe 301, as Figure 4 shown, one end of the central slide shoe 201 and the annular slide shoe 301 away from the main shaft 10 both have a spherical groove 2011, and one end of the central connecting rod 202 and each plunger 302 close to the main shaft 10 both have a spherical head 2021, and each spherical head 2021 is placed in the corresponding spherical groove 2011.
[0037] It should be noted that, as Figure 4 shown, each plunger 302 and the central connecting rod 202 both have a flow passage 3021 at the center. When the swash plate type plunger motor works, hydraulic oil can flow from the flow passage 3021 on the plunger 302 into the spherical groove 2011, and provide lubrication for the spherical head 2021.
[0038] Further, after the hydraulic oil flows into the spherical groove 2011 on the annular slide shoe 301, it does not directly discharge to the outside. If magnetic metal debris is doped in the hydraulic oil and flows into the spherical groove 2011 on the annular slide shoe 301, it is easy to exacerbate the wear of the spherical groove 2011. In view of this, as Figure 4As shown, at the bottom of each spherical groove 2011 on the ring slide shoe 301, there is a drilling part 3011. At the bottom of the drilling part 3011, there is a magnet 3012. By setting the magnet 3012, magnetic metal debris in the hydraulic oil is adsorbed into the drilling part 3011, avoiding friction with the groove surface of the spherical groove 2011 or the spherical head 2021 of the plunger 302.
[0039] Further, to achieve the discharge of the hydraulic oil flowing into the flow channel 3021 of the central connecting rod 202 after the central connection swings by a predetermined angle, as Figure 3 and Figure 4 shown, at the bottom of the spherical groove 2011 on the central slide shoe 201, there is a through hole 2012, and the main shaft 10 has a discharge channel 102. The through hole 2012 is communicated with the discharge channel 102.
[0040] Further, when the spherical groove 2011 on the central slide shoe 201 or the ring slide shoe 301 is severely worn, to facilitate the removal of the central slide shoe 201 or the ring slide shoe 301, as Figure 5 shown, the outer side walls of the central slide shoe 201 and each ring slide shoe 301 have exhaust grooves 2013 arranged in a spiral shape, and the refrigerant can flow in from the exhaust grooves 2013. In addition, to remove the central connecting rod 202 or the plunger 302, the side walls of the central slide shoe 201 and each ring slide shoe 301 have a pre-cutting groove 2014. By further turning the pre-cutting groove 2014, the part on the central slide shoe 201 or the ring slide shoe 301 that prevents the central connecting rod 202 and the plunger 302 from detaching can be cut off, realizing the removal of the central connecting rod 202 or the plunger 302, so as to facilitate the replacement of a new central slide shoe 201 or ring slide shoe 301.
[0041] In summary, the connection structure of the main shaft and the plunger for the swash - plate type piston motor based on the embodiments of the present application is clarified, which provides advantages such as lower replacement cost for the connection structure of the main shaft and the plunger for the swash - plate type piston motor.
[0042] It is worth mentioning that in the embodiments of the present application, the connection structure of the main shaft and the plunger for the swash - plate type piston motor is simple, does not involve complex manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the connection structure of the main shaft and the plunger for the swash - plate type piston motor provided by the present application is easy to produce and has low cost, which is more conducive to controlling production costs and further conducive to product promotion and use.
[0043] Those skilled in the art should understand that the embodiments of the present utility model described above and shown in the accompanying drawings are only examples and do not limit the present utility model. The object of the present utility model has been fully and effectively achieved. The functions and structural principles of the present utility model have been demonstrated and explained in the embodiments, and without departing from this principle, any deformation or modification of the embodiments of the present utility model is possible.
Claims
1. A connecting structure between the main shaft and the plunger for an inclined-axis piston motor, which is provided on the inclined-axis piston motor, and is characterized in that: The connecting structure between the main shaft and the plunger of the bent axis plunger motor includes: A main shaft, one end of which has a disc body, the disc body having a first blind hole and a plurality of second blind holes, the second blind holes being arranged in a ring shape and located outside the first blind hole; and a central assembly, the central assembly comprising a central sliding shoe and a central connecting rod, the central sliding shoe being disposed in the first blind hole, one end of the central connecting rod being rotatably and swingably mounted on the central sliding shoe; and A plurality of Ling ring components, each of which includes a Ling ring slide shoe and a plunger, each of the second blind holes is provided with a Ling ring slide shoe, and one end of each plunger is rotatably and swingably mounted on the corresponding Ling ring slide shoe.
2. The connecting structure between the main shaft and the plunger of the swash-axial piston motor according to claim 1, characterized in that: The material of the central sliding shoe and each of the ring sliding shoes is copper, and the material of the central connecting rod and the plunger is steel.
3. The connecting structure of the main shaft and the plunger for the swash - plate type piston motor according to claim 2, wherein: The maximum radial dimension of the central sliding shoe is greater than the aperture of the first blind hole, the maximum radial dimension of the ring sliding shoe is greater than the aperture of the second blind hole, the central sliding shoe is interference fit with the first blind hole, and each of the ring sliding shoes is interference fit with the corresponding second blind hole.
4. The connection structure between the main shaft and the plunger of the swash - axis type plunger motor according to claim 3, characterized in that: The outer side walls of the central sliding shoe and each of the ring sliding shoes have exhaust grooves arranged in a spiral shape.
5. The connection structure between the main shaft and the plunger of the swash-axial piston motor according to claim 4, characterized in that: The center slide shoe and the ring slide shoe have a spherical groove at one end away from the main shaft, and the center connecting rod and each of the plungers have a ball head at one end close to the main shaft, and each of the ball heads is placed in the corresponding spherical groove.
6. The connecting structure between the main shaft and the plunger of the swash-axial piston motor according to claim 5, characterized in that: The bottom of the spherical groove on each of the ring sliding shoes has a drilling portion, and a magnet is arranged at the bottom of the drilling portion.
7. The connecting structure between the main shaft and the plunger of the swash-axial piston motor according to claim 6, wherein: The bottom of the spherical groove on the central sliding shoe has a through hole, the main shaft has a discharge channel, and the through hole is connected to the discharge channel.
8. The connection structure between the main shaft and the plunger of the swash-axial piston motor according to claim 7, characterized in that: The side walls of the central sliding shoe and each of the circumferential sliding shoes have a pre-cut groove.