Distribution unit and assembly process method thereof

Abstract

The invention discloses a distribution unit and an assembly process method thereof. The displacement precision of the distribution unit can be guaranteed. The distribution unit comprises a valve body, an oil inlet valve, an oil outlet one-way valve, an oil inlet pressure body and a first elastic part, an oil inlet cavity, an oil outlet cavity and a step structure for separating the oil inlet cavity from the oil outlet cavity are arranged in the valve body, a butt joint flow channel penetrates through the step structure, and the oil inlet cavity is communicated with the oil outlet cavity through the butt joint flow channel; a first stepped hole is formed in the end, away from the stepped structure, of the oil inlet cavity, the oil inlet pressing body is installed in the first stepped hole, the oil inlet valve is movably arranged in the oil inlet cavity in the axial direction and arranged between the oil inlet pressing body and the stepped structure, and the first elastic piece is installed in the oil inlet cavity. One end of the oil inlet valve forms an inserting end capable of being inserted into the butt joint runner, the other end of the oil inlet valve forms a butt joint end face, an oil passing runner is arranged in the oil inlet pressing body and communicated with the oil inlet cavity, an oil passing gap is formed between the oil inlet valve and the inner wall of the oil inlet cavity, and the oil outlet one-way valve is arranged in the oil outlet cavity.

Description

Technical Field

[0001] The invention relates to the field of dispensers, in particular to a dispenser unit and an assembly process method thereof. Background Art

[0002] The lubricating oil distributor is installed on a machine and connected to the output end of an oiler to distribute a specific volume of lubricating oil output by the oiler to several pipelines, which are then transported to various parts of the machine that need lubrication. In this way, not only can the machine be fully lubricated to ensure smooth operation, but also it can avoid the need to lay out overly complicated connecting pipelines between the machine and the oiler.

[0003] The existing distributor includes a main body and a plurality of distribution units installed on the main body, such as Figure 7 As shown, the existing distribution unit includes a valve body 91, an oil inlet pressure body 92, an oil inlet valve 93 and an oil outlet check valve 94. An oil inlet chamber 911 and an oil outlet chamber 912 are provided in the valve body 91. The oil inlet pressure body 92 and the oil inlet valve 93 are installed in the oil inlet chamber 911, and the oil outlet check valve 94 is installed in the oil outlet chamber 912. The oil inlet chamber 911 and the oil outlet chamber 912 are separated by a step structure 913. The oil inlet valve 93 and the oil outlet check valve 94 are pressed against the through hole of the step structure. The displacement of the distribution unit is mainly affected by the diameter D and the movement stroke L of the oil inlet valve. The displacement is calculated as: π*(D / 2)*L. The diameter D is only affected by its processing accuracy, while L is affected by the sealing surface where its end face contacts the step structure. The sealing surface will affect the valve knocking line, such as Figure 6 As shown, the knock valve line refers to a circle of structural lines (indicated by dotted lines, which do not really exist) that contact the contour edge of the through hole when the end of the oil inlet valve 93 is inserted into the through hole. The knock valve line is different for different positioning methods, and the accuracy of the knock valve line has a great influence on the displacement. According to the reference value calculated as 0.01ml / cy±10%, the displacement error is 2% for every 0.01mm error. Generally, the depth of the valve line changes between 0.1-0.3mm, and the error changes by 20%-60%. If the depth machining error of the oil inlet cavity, the machining error of the oil inlet valve, and the assembly error of the oil inlet pressure body are added, the displacement of the entire distributor will be out of control. Therefore, it is necessary to provide a distribution unit that helps to ensure the displacement accuracy, and an assembly process method that helps to make the displacement error of the distribution unit meet the standard. Summary of the invention

[0004] The object of the present invention is to provide a dispensing unit which helps to ensure the displacement accuracy.

[0005] Another object of the present invention is to provide an assembly process method that helps to make the displacement tolerance of a dispensing unit meet standards.

[0006] To achieve the above-mentioned purpose, the distribution unit provided by the present invention includes a valve body, an oil inlet valve, an oil outlet one-way valve, an oil inlet pressure body and a first elastic member. The valve body is provided with an oil inlet chamber, an oil outlet chamber and a stepped structure separating the oil inlet chamber and the oil outlet chamber. A docking flow channel runs through the stepped structure. The oil inlet chamber and the oil outlet chamber are connected through the docking flow channel. The oil inlet chamber is far away from the step structure at one end to form a first step hole. The oil inlet pressure body is installed in the first step hole. The oil inlet valve is axially movable in the oil inlet chamber. The oil inlet valve is arranged between the oil inlet pressure body and the stepped structure. The first elastic member is installed in the oil inlet chamber. One end of the oil inlet valve forms a plug-in end which can be inserted into the docking flow channel and the other end forms a docking end face. An oil flow channel is provided in the oil inlet pressure body. The oil flow channel is connected with the oil inlet chamber, and the oil inlet pressure body is driven to adjust its position axially in the first step hole through the axial movement of a press-fit tooling which penetrates into the oil flow channel, and the press-fit tooling pushes the butt end face to insert the plug end into the butt flow channel to simultaneously finalize the position of the valve line of the oil inlet valve, thereby determining the stroke spacing between the oil inlet valve and the oil inlet pressure body, and forming an oil gap between the oil inlet valve and the inner wall of the oil inlet chamber, and the first elastic member always has a tendency to drive the oil inlet valve away from the step structure, so as to make the plug end leave the butt flow channel and make the butt end face close to the oil inlet pressure body, and the oil outlet one-way valve is arranged in the oil outlet chamber, and the oil outlet one-way valve always has a tendency to close the butt flow channel to cut off the connection between the oil inlet chamber and the oil outlet chamber.

[0007] Preferably, the oil inlet pressure body is a stepped shaft structure, and one end of the oil inlet pressure body is inserted into the oil inlet cavity.

[0008] Preferably, the oil inlet pressure body comprises an inserting end and a mounting end arranged in a stepped shape, the inserting end is inserted into the oil inlet cavity, and the mounting end is mounted in the first stepped hole.

[0009] Preferably, the butt-jointing end surface is a planar structure, and the plug-in end is a conical structure or a spherical structure.

[0010] Preferably, the oil inlet valve includes a cylindrical structure and a plug-in structure. The diameter of the plug-in structure is smaller than the diameter of the cylindrical structure. The cylindrical structure is installed in the oil inlet chamber with a clearance fit. The end face of the cylindrical structure facing the oil inlet pressure body forms a planarly arranged docking end face, and the end of the plug-in structure forms a conically arranged plug-in end or is installed with a spherical structure.

[0011] Preferably, the docking flow channel is a circular through hole coaxially arranged with the valve body.

[0012] Preferably, the first elastic member is sleeved on the plug-in structure and arranged between the stepped structure and the cylindrical structure.

[0013] Preferably, the oil flow passage forms a second stepped hole, and the press-fitting tool is inserted into the second stepped hole and moves axially to drive the oil inlet pressure body to adjust its position axially in the first stepped hole.

[0014] Preferably, the oil flow passage forms a second stepped hole, and the press-fitting tool is inserted into the second stepped hole and moves axially to drive the oil inlet pressure body to adjust its position axially in the first stepped hole.

[0015] To achieve the second objective, the present invention further provides an assembly process for a distribution unit, using a press-fit tool to position the distribution unit, comprising the following steps:

[0016] S1: Install the oil inlet valve and the first elastic member in the oil inlet chamber, the first elastic member is arranged between the stepped structure and the oil inlet valve, and the oil inlet pressure body is installed in the first stepped hole;

[0017] S2: Install the press-fitting tool into the second stepped hole, operate the press-fitting tool in the axial direction to move close to the stepped structure, so that the press-fitting tool presses the butt end face of the oil inlet valve, drives the oil inlet valve to move close to the stepped structure, compresses the first elastic member until the plug-in end of the oil inlet valve is inserted into the butt flow channel, stops the press-fitting tool to complete the valve line, during this process, the press-fitting tool simultaneously drives the oil inlet pressure body to move in the axial direction in the first stepped hole close to the stepped structure, and after the press-fitting tool, the oil inlet valve and the oil inlet pressure body stop moving at the same time, the tool positioning of the oil inlet pressure body and the oil inlet valve is completed;

[0018] S3: Take out the press-fit tooling.

[0019] Compared with the prior art, the present invention installs the oil inlet pressure body in the first step hole, uses a press-fit tool to penetrate into the oil flow channel and move axially, thereby driving the oil inlet pressure body to adjust its position along the axial direction in the first step hole, and the press-fit tool that passes through the oil flow channel pushes the mating end surface to insert the plug end into the mating flow channel, thereby finalizing the position of the valve line of the oil inlet valve, that is, determining the position where the oil inlet valve stops each time. After determining the position where the oil inlet valve stops each time it moves, the press-fit tool also stops immediately. At this time, the press-fit tool no longer drives the oil inlet pressure body to move, and simultaneously adjusts the position of the oil inlet pressure body. At this time, the stroke spacing L between the oil inlet valve and the oil inlet pressure body is also determined, and the tooling accuracy of the stroke spacing L is precisely controlled, so that a distribution unit that ensures displacement accuracy can be manufactured. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective view of a dispensing unit of the present invention.

[0021] Figure 2 It is a cross-sectional view of a dispensing unit according to a first embodiment of the present invention.

[0022] Figure 3 It is a cross-sectional view of the dispensing unit of the first embodiment provided by the present invention when the press-fitting tool is used to position the tool.

[0023] Figure 4 It is a cross-sectional view of a dispensing unit according to a second embodiment of the present invention.

[0024] Figure 5 It is a cross-sectional view of the present invention after the distribution unit is installed on the mounting block.

[0025] Figure 6 It is a three-dimensional view of the oil inlet valve of the present invention.

[0026] Figure 7 is a cross-sectional view of an existing distribution unit. DETAILED DESCRIPTION

[0027] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the implementation modes and the accompanying drawings.

[0028] like Figure 3 As shown, the present invention provides a distribution unit 100, which is suitable for being installed in a mounting block 200. An oil inlet channel 201 and a plurality of mounting channels 202 are provided in the mounting block. The mounting channel 202 is connected with the oil inlet channel 201. The distribution unit 100 is installed in the mounting channel 202. After oil is input into the oil inlet channel 201, the oil is output through the distribution unit 100, and the oil is distributed to a plurality of pipelines.

[0029] like Figure 1 , Figure 2 and Figure 3As shown, the distribution unit 100 of the present invention includes a valve body 10, an oil inlet valve 20, an oil outlet check valve 30, an oil inlet pressure body 40 and a first elastic member 50. The valve body 10 is provided with an oil inlet chamber 11, an oil outlet chamber 12 and a step structure 13 separating the oil inlet chamber 11 and the oil outlet chamber 12. A docking flow channel 14 runs through the step structure 13, and the oil inlet chamber 11 and the oil outlet chamber 12 are connected through the docking flow channel 14. The first step hole 15 is formed at one end of the oil inlet chamber 11 away from the step structure 13. The oil inlet valve 20 is movably arranged in the oil inlet chamber 11 along the axial direction, and the oil inlet valve 20 is arranged between the oil inlet pressure body 40 and the step structure 13. The first elastic member 50 is installed in the oil inlet chamber 11. One end of the oil inlet valve 20 forms a plug-in end 21 that can be inserted into the docking flow channel 14, and the other end forms a docking end face 22. An oil flow passage 41 is provided in the oil inlet pressure body 40, and the oil flow passage 41 is connected with the oil inlet cavity 11. The oil inlet pressure body 40 is driven to adjust its position in the first stepped hole 15 by the axial movement of a press-fitting fixture 01 inserted into the oil flow passage 41, and the press-fitting fixture 01 pushes the butt end face 22 to insert the plug end 21 into the butt flow passage 14 to synchronously calibrate the position of the valve line of the oil inlet valve 20, thereby determining the stroke spacing L between the oil inlet valve 20 and the oil inlet pressure body 40. An oil flow gap (not shown in the figure) is formed between the oil inlet valve 20 and the inner wall of the oil inlet cavity 11. The first elastic member 50 always has a tendency to drive the oil inlet valve 20 away from the stepped structure 13, so that the plug end 21 leaves the butt flow passage 14 and the butt end face 22 is close to the oil inlet pressure body 40. The oil outlet one-way valve 30 is disposed in the oil outlet chamber 12 , and the oil outlet one-way valve 30 always has a tendency to close the docking flow channel 14 to cut off the communication between the oil inlet chamber 11 and the oil outlet chamber 12 .

[0030] When injecting oil, the oil pushes the oil inlet valve 20, so that the plug end 21 is inserted into the docking flow channel 14, pushing the oil retained in the docking flow channel 14, so that the oil pressure in the docking flow channel 14 rises and pushes open the oil outlet check valve 30, and then flows into the oil outlet chamber 12, realizing the oil pumping action. When the oil injection stops, the oil inlet valve 20 is pushed away from the docking flow channel 14 by the first elastic member 50, and the oil in the oil inlet chamber 11 flows into the docking flow channel 14 through the oil gap, and the oil outlet check valve 30 is reset to close the docking flow channel 14, cutting off the connection between the oil inlet chamber 11 and the oil outlet chamber 12, and the oil is stored in the docking flow channel 14. In this reciprocating cycle, the oil pumping action can be repeatedly realized.

[0031] Compared with the prior art, the present invention installs the oil inlet pressure body 40 in the first stepped hole 15, uses the press-fitting tool 01 to penetrate into the oil flow channel 41 and move axially, thereby driving the oil inlet pressure body 40 to adjust its position axially in the first stepped hole 15, and the press-fitting tool 01 passing through the oil flow channel 41 pushes the docking end face 22 so that the plug end 21 is inserted into the docking flow channel 14, thereby finalizing the position of the valve line of the oil inlet valve 20, that is, determining the position where the oil inlet valve 20 stops each time. After determining the position where the oil inlet valve 20 stops each time it moves, the press-fitting tool 01 also stops immediately. At this time, the press-fitting tool 01 no longer drives the oil inlet pressure body 40 to move, and simultaneously adjusts the position of the oil inlet pressure body 40. At this time, the stroke spacing L between the oil inlet valve 20 and the oil inlet pressure body 40 is also determined, and the tooling accuracy of the stroke spacing L is precisely controlled.

[0032] like Figure 2 and Figure 3 As shown, the oil inlet pressure body 40 is a stepped shaft structure, and one end of the oil inlet pressure body 40 is inserted into the oil inlet cavity 11. This design allows the oil inlet pressure body 40 to move along the axial direction to adjust its position. Specifically, the oil inlet pressure body 40 includes an insertion end 42 and a mounting end 43 arranged in a stepped shape, the insertion end 42 is inserted into the oil inlet cavity 11, and the mounting end 43 is mounted in the first stepped hole 15.

[0033] The butt end face 22 is a planar structure, and the plug end 21 is a conical structure. Figure 2 and Figure 3 Of course, according to actual needs, in the second embodiment provided by the present invention, the plug end 21 can also be applied as a spherical structure, such as Figure 4 shown.

[0034] The oil inlet valve 20 includes a cylindrical structure 23 and a plug-in structure 24. The diameter of the plug-in structure 24 is smaller than that of the cylindrical structure 23. The cylindrical structure 23 is installed in the oil inlet cavity 11 with a clearance fit. The end surface of the cylindrical structure 23 facing the oil inlet pressure body 40 forms a planarly arranged butt joint end surface 22. In the first embodiment provided by the present invention, the end of the plug-in structure 24 forms a conical plug-in end 21, so that the plug-in end 21 has a conical structure (such as Figure 2 and Figure 3 In the second embodiment provided by the present invention, of course, a spherical structure can also be installed at the end of the plug-in structure 24, so that the plug-in end 21 is a spherical structure (such as Figure 4 shown).

[0035] like Figure 2 , Figure 3 and Figure 4 As shown, the docking flow channel 14 is a circular through hole coaxially arranged with the valve body 10 , so that the plug end 21 can be inserted into the docking flow channel 14 .

[0036] like Figure 2 , Figure 3 , Figure 4 As shown, the first elastic member 50 is sleeved on the plug structure 24 and disposed between the step structure 13 and the cylindrical structure 23, so as to improve the installation stability of the first elastic member 50 and to more stably drive the oil inlet valve 20 to move. Preferably, the first elastic member 50 is selected as a spring, but not limited thereto.

[0037] like Figure 2 , Figure 3 and Figure 4 As shown, the oil flow channel 41 forms a second stepped hole. The press-fitting fixture 01 is inserted into the second stepped hole and moves axially to drive the oil inlet pressure body 40 to adjust its position axially in the first stepped hole 15. Preferably, the press-fitting fixture 01 used in the present invention is T-shaped. If the second stepped hole is divided into two parts, including a first part 411 with a relatively small diameter and a second part 412 with a relatively large diameter, it can be understood that the machining accuracy of the depth dimension L2 of the first part 411 directly represents and reflects the tooling accuracy of the oil inlet pressure body 40. By strictly controlling the machining accuracy of L2, it directly helps to ensure the displacement accuracy of the distribution unit 100.

[0038] like Figure 2 , Figure 3 and Figure 4 As shown, the oil outlet one-way valve 30 includes an oil outlet valve 31 and a second elastic member 32 . The second elastic member 32 and the oil outlet valve 31 are installed in the oil outlet chamber 12 . The second elastic member 32 always has a tendency to drive the oil outlet valve 31 to insert into the docking flow channel 14 to close the docking flow channel 14 .

[0039] For example, if the displacement requirement of the distribution unit 100 is 0.01 ml / cy ± 10%, the diameter D of the oil inlet pressure body 40 is Φ5 (+0.03, +0.042), the dimension of L is 0.5 mm, and the depth dimension of the second part L2 is 3.75 mm (0, +0.02).

[0040] The influence of L2 size on displacement, the maximum error displacement is: π*(5.03 / 2) 2 *0.02 / 1000=0.0004ml, at this time the error ratio is 0.0004 / 0.01=0.04, 0.01 is the displacement requirement of the distributor. The influence of D dimension on displacement, the maximum error displacement is: (π*((5.042 / 2) 2 -(5.03 / 2) 2)*0.5 / 1000) / 0.01=0.0048, 0.01 is the displacement requirement of the distributor, and 0.5 is the size of L. The total error influence of L2 and D on the displacement is only 0.04+0.0048=4.48%, which shows that the displacement error is effectively controlled within 5%, which greatly controls the influence of processing error, assembly error, etc. on the displacement, and effectively ensures the displacement accuracy of the distribution unit 100.

[0041] The following describes the assembly process method of the distribution unit 100 of the present invention. Using this assembly process method, several parts of the distribution unit 100 can be accurately positioned so that the displacement error of the distribution unit 100 is within the standard range. The following describes the assembly process method. Figure 3 As shown, a press-fitting tool 01 is used to position the distribution unit 100, which includes the following steps:

[0042] S1: Install the oil inlet valve 20 and the first elastic member 50 in the oil inlet chamber 11, the first elastic member 50 is arranged between the stepped structure 13 and the oil inlet valve 20, and install the oil inlet pressure body 40 in the first stepped hole 15;

[0043] S2: Install the press-fitting tool 01 into the second stepped hole, operate the press-fitting tool 01 axially to move close to the stepped structure 13, so that the press-fitting tool 01 presses the docking end face 22 of the oil inlet valve 20, drives the oil inlet valve 20 to move close to the stepped structure 13, compresses the first elastic member 50 until the plug-in end 21 of the oil inlet valve 20 is inserted into the docking flow channel 14, and the press-fitting tool 01 stops moving to complete the valve line. During this process, the press-fitting tool 01 synchronously drives the oil inlet pressure body 40 to move axially in the first stepped hole 15 close to the stepped structure 13. After the press-fitting tool 01, the oil inlet valve 20 and the oil inlet pressure body 40 stop moving at the same time, the tool positioning of the oil inlet pressure body 40 and the oil inlet valve 20 is completed;

[0044] S3: Take out the press-fit tool 01.

[0045] The above disclosure is only a preferred embodiment of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.

Claims

1. A distribution unit, characterized in that: The invention relates to a valve body, an oil inlet valve, an oil outlet one-way valve, an oil inlet pressure body and a first elastic member, wherein an oil inlet chamber, an oil outlet chamber and a stepped structure separating the oil inlet chamber and the oil outlet chamber are arranged in the valve body, a docking flow channel runs through the stepped structure, the oil inlet chamber and the oil outlet chamber are connected through the docking flow channel, a first stepped hole is formed at one end of the oil inlet chamber away from the stepped structure, the oil inlet pressure body is installed in the first stepped hole, the oil inlet valve is movably arranged in the oil inlet chamber along the axial direction, the oil inlet valve is arranged between the oil inlet pressure body and the stepped structure, the first elastic member is installed in the oil inlet chamber, one end of the oil inlet valve forms a plug-in end which can be inserted into the docking flow channel and the other end forms a docking end face, an oil flow channel is arranged in the oil inlet pressure body, the oil flow channel is connected to the oil inlet chamber, and the The oil inlet pressure body is driven to adjust its position axially in the first stepped hole through the axial movement of a press-fitting tool that penetrates into the oil flow channel, and the press-fitting tool pushes the butt end face to insert the plug end into the butt flow channel to simultaneously finalize the position of the valve line of the oil inlet valve, thereby determining the stroke spacing between the oil inlet valve and the oil inlet pressure body, and an oil flow gap is formed between the oil inlet valve and the inner wall of the oil inlet chamber, the first elastic member always has a tendency to drive the oil inlet valve away from the stepped structure, so that the plug end leaves the butt flow channel and the butt end face is close to the oil inlet pressure body, the oil outlet one-way valve is arranged in the oil outlet chamber, and the oil outlet one-way valve always has a tendency to close the butt flow channel to cut off the connection between the oil inlet chamber and the oil outlet chamber.

2. The distribution unit according to claim 1, characterized in that The oil inlet pressure body is a stepped shaft structure, and one end of the oil inlet pressure body is inserted into the oil inlet cavity.

3. The distribution unit according to claim 2, characterized in that The oil inlet pressure body comprises an inserting end and a mounting end arranged in a stepped shape, the inserting end is inserted into the oil inlet cavity, and the mounting end is mounted in the first stepped hole.

4. The distribution unit according to claim 1, characterized in that The butt joint end surface is a plane structure, and the plug end is a conical structure or a spherical structure.

5. The distribution unit according to claim 1, characterized in that The oil inlet valve includes a cylindrical structure and a plug-in structure. The diameter of the plug-in structure is smaller than the diameter of the cylindrical structure. The cylindrical structure is installed in the oil inlet cavity with a clearance fit. The end face of the cylindrical structure facing the oil inlet pressure body forms a planarly arranged docking end face, and the end of the plug-in structure forms a conically arranged plug-in end or is installed with a spherical structure.

6. The distribution unit according to claim 1, characterized in that: The docking flow channel is a circular through hole coaxially arranged with the valve body.

7. The distribution unit according to claim 5, characterized in that The first elastic member is sleeved on the plug-in structure and arranged between the step structure and the cylindrical structure.

8. The distribution unit according to claim 1, characterized in that The oil passage forms a second stepped hole, and the press-fitting tool is inserted into the second stepped hole and moves axially to drive the oil inlet pressure body to adjust its position axially in the first stepped hole.

9. The distribution unit according to claim 1, characterized in that: The oil outlet one-way valve includes an oil outlet valve and a second elastic member, the second elastic member and the oil outlet valve are installed in the oil outlet cavity, the second elastic member elastically abuts against the oil outlet valve, and the second elastic member always has a tendency to drive the oil outlet valve to insert into the docking flow channel to close the docking flow channel.

10. An assembly process method for a distribution unit, characterized in that: Using a press-fit tool to position the dispensing unit according to any one of claims 1 to 9 comprises the following steps: The oil inlet valve and the first elastic member are installed in the oil inlet chamber, the first elastic member is arranged between the step structure and the oil inlet valve, and the oil inlet pressure body is installed in the first step hole; The press-fitting tool is installed in the second stepped hole, and the press-fitting tool is operated axially to move close to the stepped structure, so that the press-fitting tool presses the docking end face of the oil inlet valve, drives the oil inlet valve to move close to the stepped structure, compresses the first elastic member until the plug-in end of the oil inlet valve is inserted into the docking flow channel, and the press-fitting tool stops moving to complete the valve line. During this process, the press-fitting tool synchronously drives the oil inlet pressure body to move axially in the first stepped hole close to the stepped structure. After the press-fitting tool, the oil inlet valve and the oil inlet pressure body stop moving at the same time, the tool positioning of the oil inlet pressure body and the oil inlet valve is completed; Remove the press-fit tool.

Images