Shaft mounting structure and piezoelectric injection valve having same

Abstract

The utility model discloses a shaft installation structure and a piezoelectric injection valve with the shaft installation structure, the shaft installation structure comprises a shaft sleeve and a shaft body, the shaft body is installed in the shaft sleeve, and the shaft body is provided with an annular groove; the limiting column is installed in the shaft sleeve, the axis of the shaft body is perpendicular to the axis of the limiting column, and the limiting column is clamped in the annular groove; wherein the vertical distance between the center line of the limiting column and the groove bottom of the annular groove is X, the depth of the annular groove is S, and X is smaller than or equal to S. According to the utility model, the vertical movement of the shaft body is limited by adopting the limiting column, so that not only is the structure simpler, but also the disassembly and assembly are more convenient; and through mutual cooperation of the limiting column and the annular groove, rotation of the shaft body is not hindered when the shaft body is limited to move up and down.

Description

Technical Field

[0001] The utility model relates to the technical field of piezoelectric injection valves, in particular to a shaft installation structure and a piezoelectric injection valve having the same. Background Art

[0002] At present, the regulating mechanism of the piezoelectric injection valve is mainly used to adjust the preload force of the actuator on the lever to meet the design requirements. The regulating mechanism cannot move up and down during adjustment. For example, the piezoelectric valve preload regulating mechanism disclosed in Chinese patent CN114226175A_ adopts a limit block installed on the regulating element to limit the up and down movement of the regulating element. In the existing structure, the limit block is stuck in the installation cavity of the valve body. It is easy to install it, but it is very difficult to take it out. It is necessary to first use a screw to form a fixed connection with the limit block, and then pull the screw to take the limit block out of the valve body. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, the utility model provides a shaft mounting structure and a piezoelectric injection valve having the same, which not only makes the structure of the adjustment mechanism simpler but also makes disassembly and assembly more convenient through structural improvement.

[0005] According to the shaft mounting structure of the embodiment of the utility model, it includes: a shaft sleeve and a shaft body, the shaft body is installed in the shaft sleeve, and an annular groove is opened on the shaft body; a limiting column, the limiting column is installed in the shaft sleeve, the axis of the shaft body and the axis of the limiting column are perpendicular to each other, and the limiting column is clamped in the annular groove; wherein the vertical distance between the center line of the limiting column and the bottom of the annular groove is X, the depth of the annular groove is S, and X≤S.

[0006] The beneficial effect of the utility model is that the limit column is used to limit the up and down movement of the shaft body, which not only has a simpler structure but also is more convenient for disassembly and assembly; through the mutual cooperation of the limit column and the annular groove, the rotation of the shaft body will not be hindered when limiting the up and down movement of the shaft body.

[0007] According to an embodiment of the present invention, the diameter of the limiting column matches the width W of the annular groove.

[0008] According to an embodiment of the utility model, a first mounting hole for mounting the shaft body is formed on the shaft sleeve.

[0009] According to an embodiment of the utility model, a second mounting hole for mounting a limiting column is formed on the shaft sleeve.

[0010] According to an embodiment of the present invention, the second mounting hole is communicated with the first mounting hole.

[0011] According to an embodiment of the utility model, the inner diameter of the second mounting hole matches the diameter of the limiting column.

[0012] A piezoelectric injection valve with a shaft mounting structure comprises: a valve body, an actuator and an adjusting mechanism, wherein the actuator is mounted in the valve body, the adjusting mechanism is mounted on the valve body, and the adjusting mechanism is connected to the actuator; wherein the shaft sleeve is a part of the valve body, the adjusting mechanism comprises an adjusting element and a limit column, and the shaft body is a part of the adjusting element.

[0013] According to an embodiment of the utility model, the adjusting element further comprises: a rotating operating part and a connecting part, wherein the rotating operating part and the connecting part are respectively fixedly connected to two ends of the shaft body, and the connecting part is threadedly connected to the actuator.

[0014] According to an embodiment of the utility model, the adjustment mechanism further includes: an elastic element, and the elastic element is sleeved on the connecting portion.

[0015] According to an embodiment of the present invention, the diameter of the shaft body is greater than the diameter of the connecting portion.

[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures specifically pointed out in the description, claims and drawings.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a structural schematic diagram of the shaft installation structure of the utility model.

[0020] Figure 2 It is a cross-sectional view of the shaft mounting structure of the utility model.

[0021] Figure 3 It is a cross-sectional view of the shaft and the limiting column of the utility model in the vertical direction.

[0022] Figure 4 It is a cross-sectional view of the shaft and the limiting column of the utility model in the horizontal direction.

[0023] Figure 5It is a structural schematic diagram of the mounting hole of the shaft sleeve of the utility model.

[0024] Figure 6 It is a structural schematic diagram of the piezoelectric injection valve of the utility model.

[0025] Figure 7 It is a structural schematic diagram of the regulating element and the limiting column of the utility model.

[0026] In the figure: 1, sleeve; 2, shaft body; 3, limit column; 11, first mounting hole; 12, second mounting hole; 21, annular groove; 100, valve body; 200, actuator; 300, adjustment mechanism; 301, rotary operating part; 302, connecting part; 303, elastic element. DETAILED DESCRIPTION

[0027] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0028] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figures 1 to 5As shown, the shaft mounting structure of the utility model comprises: a shaft sleeve 1, a shaft body 2 and a limiting column 3, the shaft body 2 is mounted in the shaft sleeve 1, and an annular groove 21 is provided on the shaft body 2; the limiting column 3 is mounted in the shaft sleeve 1, the axis of the shaft body 2 and the axis of the limiting column 3 are perpendicular to each other, and the limiting column 3 is clamped in the annular groove 21; wherein, the vertical distance between the center line of the limiting column 3 and the bottom of the annular groove 21 is X, the depth of the annular groove 21 is S, and X≤S.

[0031] Compared with the prior art, the limiting column 3 is used to limit the up and down movement of the shaft body 2. When installing, just insert the limiting column 3 into the shaft sleeve 1. When removing, just gently push the limiting column 3 and then take the limiting column 3 out of the shaft sleeve 1. The operation is more convenient. In addition, by designing the positional relationship between the limiting column 3 and the annular groove 21, the rotation of the shaft body 2 will not be hindered when limiting the up and down movement of the shaft body 2.

[0032] For example, the center line of the limiting column 3 in the vertical direction is a, and the center line in the horizontal direction is b. The vertical distances between the center lines a, b and the bottom of the annular groove 21 are both less than or equal to the depth S of the annular groove 21.

[0033] For example, the shaft body 2 is arranged in the shaft sleeve 1 along the up-down direction, then the limit column 3 can be arranged along the front-to-back direction, along the left-to-right direction, etc., as long as the axis of the shaft body 2 and the axis of the limit column 3 are perpendicular to each other. For example, the diameter of the limit column 3 matches the width W of the annular groove 21. It should be noted that the portion of the limit column 3 located in the annular groove 21 is in contact with the side wall of the annular groove 21. For example, the cross-sectional shape of the annular groove 21 can be rectangular, arc-shaped, etc., which is not limited here.

[0034] For example, the shaft sleeve 1 is provided with a first mounting hole 11 for mounting the shaft body 2. The shaft sleeve 1 is provided with a second mounting hole 12 for mounting the limiting column 3. The inner diameter of the second mounting hole 12 matches the diameter of the limiting column 3. There is no gap between the limiting column 3 and the inner wall of the second mounting hole 12. The second mounting hole 11 is connected with the first mounting hole 12. For example, there are two limiting columns 3, which are respectively located on opposite sides of the shaft body 2. The middle part of the second mounting hole 11 is connected with the first mounting hole 12, so that when the limiting column 3 is inserted into the second mounting hole 11, it can be stuck in the annular groove 21.

[0035] like Figure 6 to Figure 7As shown, the piezoelectric injection valve with a shaft mounting structure of the utility model includes: a valve body 100, an actuator 200 and an adjusting mechanism 300, wherein the actuator 200 is mounted in the valve body 100, the adjusting mechanism 300 is mounted on the valve body 100, and the adjusting mechanism 300 is connected to the actuator 200; wherein the sleeve 1 is a part of the valve body 100, the adjusting mechanism 300 includes an adjusting element and a limiting column 3, and the shaft body 2 is a part of the adjusting element. The adjusting element also includes: a rotating operating part 301 and a connecting part 302, wherein the rotating operating part 301 and the connecting part 302 are fixedly connected to the two ends of the shaft body 2 respectively, and the connecting part 302 is threadedly connected to the actuator 200. The adjusting mechanism 300 also includes: an elastic element 303, wherein the elastic element 303 is sleeved on the connecting part 302. The diameter of the shaft body 1 is greater than the diameter of the connecting part 302.

[0036] When the adjusting element is rotated, the actuator 200 can be driven to move upward or downward, thereby adjusting the position of the actuator 200 in the valve body 100 .

[0037] In summary, the shaft mounting structure of the utility model and the piezoelectric injection valve having the same, through structural improvement, use the limit column 3 to limit the up and down movement of the adjustment element 2, not only the structure is simpler, but also the disassembly and assembly are more convenient. By designing the position relationship and size of the annular groove 21 and the limit column 3, when the up and down movement of the adjustment element is limited, the rotation of the adjustment element will not be hindered.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A shaft mounting structure, characterized in that: include: a bushing (1), and A shaft body (2), the shaft body (2) being installed in the shaft sleeve (1), and an annular groove (21) being formed on the shaft body (2); A limiting column (3), wherein the limiting column (3) is installed in the shaft sleeve (1), the axis of the shaft body (2) and the axis of the limiting column (3) are perpendicular to each other, and the limiting column (3) is clamped in the annular groove (21); The vertical distance between the center line of the limiting column (3) and the bottom of the annular groove (21) is X, the depth of the annular groove (21) is S, and X≤S.

2. The shaft mounting structure according to claim 1, characterized in that: The diameter of the limiting column (3) matches the width W of the annular groove (21).

3. The shaft mounting structure according to claim 1, characterized in that: The shaft sleeve (1) is provided with a first mounting hole (11) for mounting the shaft body (2).

4. The shaft mounting structure according to claim 3, characterized in that: The shaft sleeve (1) is provided with a second mounting hole (12) for mounting a limiting column (3).

5. The shaft mounting structure according to claim 4, characterized in that: The second mounting hole (12) is communicated with the first mounting hole (11).

6. The shaft mounting structure according to claim 4, characterized in that: The inner diameter of the second mounting hole (12) matches the diameter of the limiting column (3).

7. A piezoelectric injection valve having a shaft mounting structure as claimed in any one of claims 1 to 6, characterized in that: include: A valve body (100), an actuator (200) and an adjusting mechanism (300), wherein the actuator (200) is installed in the valve body (100), the adjusting mechanism (300) is installed on the valve body (100), and the adjusting mechanism (300) is connected to the actuator (200); wherein the sleeve (1) is a part of the valve body (100), the adjusting mechanism (300) comprises an adjusting element and a limiting column (3), and the shaft (2) is a part of the adjusting element.

8. The piezoelectric injection valve according to claim 7, characterized in that The adjusting element further comprises: a rotating operating part (301) and a connecting part (302); the rotating operating part (301) and the connecting part (302) are respectively fixedly connected to two ends of the shaft body (2); and the connecting part (302) is threadedly connected to the actuator (200).

9. The piezoelectric injection valve according to claim 8, characterized in that The adjustment mechanism (300) further comprises: an elastic element (303), wherein the elastic element (303) is sleeved on the connecting portion (302).

10. The piezoelectric injection valve according to claim 8, characterized in that The diameter of the shaft body (2) is greater than the diameter of the connecting portion (302).

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