High-precision oil cylinder head

Abstract

The utility model discloses a high-precision oil cylinder head which comprises a base (1) and an ejector head (2), a cushion block (3) is arranged between the base (1) and the ejector head (2), a matching groove (3.1) is formed in the base (1), and the end of the ejector head (2) is arranged in the matching groove (3.1) in a matched mode. Gaps (4) exist between the lower end face of the cushion block (3) and the upper end face of the base (1) and between the lower end face of the ejector head (2) and the upper end face of the matching groove (3.1), a plurality of first installation cavities (1.1) are formed in the base (1) in an annular array mode, and first limiting sleeves (5) are arranged in the first installation cavities (1.1). The upper end face of the first limiting sleeve (5) abuts against the lower end face of the cushion block (3). The utility model provides a high-precision oil cylinder head, and provides the following technical scheme in order to achieve the purpose of improving rotation precision.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinder heads of new energy vehicles, in particular to a high-precision oil cylinder head. Background Art

[0002] The characteristics of new energy vehicle products are large size and high precision. Cylinders must be used in production, and the rotation accuracy of the cylinder head will affect the size and appearance of the product. Utility Model Content

[0003] In view of the shortcomings and defects of the prior art, a high-precision cylinder head is provided. In order to achieve the purpose of improving the rotation accuracy, the utility model provides the following technical solutions.

[0004] A high-precision cylinder head comprises a base and a top head, a pad is arranged between the base and the top head, a matching groove is arranged on the base, the end of the top head is matched and arranged in the matching groove, there is a gap between the lower end face of the pad and the upper end face of the base, and between the lower end face of the top head and the upper end face of the matching groove, a plurality of first mounting cavities are arranged in an annular array on the base, a first limiting sleeve is arranged in the first mounting cavity, the upper end face of the first limiting sleeve abuts against the lower end face of the pad, a second mounting cavity is arranged at the lower end of the matching groove, a second limiting sleeve is arranged in the second mounting cavity, and the upper end face of the second limiting sleeve abuts against the lower end face of the top head.

[0005] Compared with the prior art, there is a gap between the base and the top head of the utility model, which can avoid direct impact during operation and cause damage to the product, thereby reducing the overall accuracy. At the same time, the first limit sleeve and the second limit sleeve on the base, the upper end of the first limit sleeve abuts against the pad, and the upper end of the second limit sleeve abuts against the top head, which ensures the stability of the overall connection and improves the accuracy.

[0006] Furthermore, a mounting groove is arranged on the outer side of the first limiting sleeve, an elastic member is arranged in the mounting groove, the elastic member is sleeved on the outer side of the first limiting sleeve, a contact groove is arranged on the lower end of the cushion block, and the upper end of the elastic member is arranged in the contact groove.

[0007] Through the above improvements, in the first embodiment, a mounting groove is arranged on the outer side of the sleeve, an elastic member is arranged in the mounting groove, and the upper end of the elastic member abuts against the abutment groove at the lower end of the cushion block.

[0008] Furthermore, the base moves toward the direction of the top head, compresses the elastic member, and the gap decreases; the base descends, the elastic member recovers, the base moves away from the top head, and the gap returns to normal.

[0009] Through the above improvements, at the moment when the cylinder head rises and the top contacts the product, the top, cushion block, etc. will compress the spring due to the impact, thereby alleviating the impact force of the cylinder head rising on the product and avoiding damage to the product.

[0010] Furthermore, a first bolt column is arranged in the first limiting sleeve and the cushion block, one end of the first bolt column is embedded in the cushion block, and the other end is arranged with a first fixing nut, and the upper end surface of the first fixing nut abuts against the lower end surface of the first limiting sleeve; a second bolt column is arranged in the second limiting sleeve and the top head, one end of the second bolt column is embedded in the top head, and the other end is arranged with a second fixing nut, and the upper end surface of the second fixing nut abuts against the lower end surface of the second limiting sleeve.

[0011] Through the above improvements, a first bolt column is arranged in the first limiting sleeve, one end of the first bolt column is embedded in the pad, and the other end is provided with a first fixing nut, so that the top and the base remain relatively vertical when they move relative to each other, and at the same time, the connection effect can be enhanced and the stability of the connection can be improved.

[0012] Furthermore, a positioning groove is provided on the base, a positioning column is provided on the positioning groove, a lower end of the positioning column is fixed in the positioning groove, and an upper end of the positioning column is inserted in the cushion block.

[0013] Through the above improvements, a positioning column is installed in the positioning groove on the base, and the positioning column is flash-plugged into the cushion block, so that the cushion block will not rotate relatively during movement, thereby maintaining stability during movement.

[0014] Furthermore, the top head includes a horizontal section and a vertical section, and a thrust ball bearing is provided between the cushion block and the horizontal section.

[0015] Through the above improvements, a thrust ball bearing is arranged between the pad and the horizontal section of the mandrel, and the thrust ball bearing can provide a large axial load for the mandrel during movement.

[0016] Furthermore, a radial needle roller bearing is arranged between the cushion block and the vertical section.

[0017] Through the above improvements, a radial needle roller bearing is arranged between the cushion block and the vertical section of the mandrel, and the radial needle roller bearing ensures the radial positioning accuracy of the mandrel during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional structural diagram of a high-precision cylinder head;

[0019] Figure 2 This is a structural diagram of a high-precision oil cylinder head from the bottom upward perspective;

[0020] Among them, 1. base; 1.1. first installation cavity; 1.2. second installation cavity; 1.3. installation groove; 1.4. elastic member; 1.5. positioning groove; 1.6. positioning column; 2. top head; 2.1. horizontal section; 2.2. vertical section; 3. pad; 3.1. matching groove; 3.2. abutment groove; 4. gap; 5. first limiting sleeve; 6. second limiting sleeve; 7. first bolt column; 7.1. first fixing nut; 8. second bolt column; 8.1. second fixing nut; 9. thrust ball bearing; 10. radial needle roller bearing. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] like Figure 1 to Figure 2 A high-precision cylinder head shown in the figure includes a base 1 and a top head 2, a cushion block 3 is arranged between the base 1 and the top head 2, a matching groove 3.1 is arranged on the base 1, the end of the top head 2 is matched and arranged in the matching groove 3.1, there is a gap 4 between the lower end face of the cushion block 3 and the upper end face of the base 1 and between the lower end face of the top head 2 and the upper end face of the matching groove 3.1, a plurality of first mounting cavities 1.1 are arranged in a circular array on the base 1, a first limiting sleeve 5 is arranged in the first mounting cavity 1.1, the upper end face of the first limiting sleeve 5 is abutted against the lower end face of the cushion block 3, a second mounting cavity 1.2 is arranged at the lower end of the matching groove 3.1, a second limiting sleeve 6 is arranged in the second mounting cavity 1.2, and the upper end face of the second limiting sleeve 6 is abutted against the lower end face of the top head 2.

[0024] A cushion block 3 is provided at the lower end of the plug 2, and a gap 4 exists between the cushion block 3 and the base 1. The plug 2 comprises a horizontal section 2.1 and a vertical section 2.2. A thrust ball bearing 9 is provided between the horizontal section 2.1 and the cushion block 3, and the thrust ball bearing 9 provides a large axial load for the plug 2; a radial needle roller bearing 10 is provided between the vertical section 2.2 and the cushion block 3, and the radial needle roller bearing 10 ensures the radial positioning accuracy of the plug 2 during rotation.

[0025] A positioning groove 1.5 is provided on the base 1, and a positioning column 1.6 is installed in the positioning groove 1.5. One end of the positioning column 1.6 is fixed in the positioning groove 1.5, and the other end is inserted in the cushion block 3, so that the cushion block 3 will not rotate relative to the base 1 when moving up and down, and always maintains a straight up and down state. A first installation cavity 1.1 for installing a first limiting sleeve 5 is also provided on the base 1. The upper end of the first installation cavity 1.1 protrudes outward to form an installation groove 1.3 for installing an elastic member 1.4. The elastic member 1.4 is arranged in the installation groove 1.3 and is sleeved on the outer wall of the first limiting sleeve 5; a contact groove 3.2 is provided at the lower end of the cushion block 3, and the upper end of the elastic member 1.4 is arranged in the contact groove 3.2.

[0026] A first bolt column 7 is arranged in the first limiting sleeve 5 and the cushion block 3, one end of the first bolt column 7 is embedded in the cushion block 3 and fixed inside the cushion block 3, and the other end is arranged with a first fixing nut 7.1, so that the first bolt column 7 can better cooperate with the first limiting sleeve 5; a second bolt column 8 is arranged in the second limiting sleeve 6 and the vertical section 2.2 of the top head 2, one end of the second bolt column 8 is embedded in the vertical section 2.2 and fixed inside the vertical section 2.2, and the other end is arranged with a second fixing nut 8.1, so that the second bolt column 8 can better cooperate with the second limiting sleeve 6; when in the initial state, the upper end face of the first fixing nut 7.1 is against the lower end face of the first limiting sleeve 5, and the upper end face of the second fixing nut 8.1 is against the lower end face of the second limiting sleeve 6.

[0027] When the base 1 moves toward the direction of the top head 2, the upper end of the elastic member 1.4 presses against the cushion block 3, and the lower end is squeezed by the base 1 to shrink. At the same time, the gap 4 between the base 1 and the cushion block 3 is continuously reduced. By compressing the elastic member 1.4 before making contact, compared with direct contact between the base 1 and the top head 2, the impact force of the rising base 1 on the top head 2 is reduced, thereby preventing direct impact from causing damage to the product.

[0028] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A high-precision cylinder head, characterized in that: The invention comprises a base (1) and a top head (2), wherein a cushion block (3) is arranged between the base (1) and the top head (2), a matching groove (3.1) is arranged on the base (1), an end of the top head (2) is matched and arranged in the matching groove (3.1), a gap (4) exists between the lower end surface of the cushion block (3) and the upper end surface of the base (1) and between the lower end surface of the top head (2) and the upper end surface of the matching groove (3.1), and the base ( 1) The upper annular array has a plurality of first installation cavities (1.1), a first limiting sleeve (5) is arranged in the first installation cavity (1.1), the upper end surface of the first limiting sleeve (5) abuts against the lower end surface of the cushion block (3), a second installation cavity (1.2) is arranged at the lower end of the matching groove (3.1), a second limiting sleeve (6) is arranged in the second installation cavity (1.2), the upper end surface of the second limiting sleeve (6) abuts against the lower end surface of the top head (2).

2. A high-precision cylinder head according to claim 1, characterized in that: The first limiting sleeve (5) is provided with a mounting groove (1.3) on the outside, an elastic member (1.4) is provided in the mounting groove (1.3), the elastic member (1.4) is sleeved on the outside of the first limiting sleeve (5), the cushion block (3) is provided with an abutment groove (3.2) at the lower end, and the elastic member (1.4) is arranged in the abutment groove (3.2) at the upper end.

3. A high-precision cylinder head according to claim 2, characterized in that: The base (1) moves toward the top head (2), compresses the elastic member (1.4), and the gap (4) decreases; the base (1) descends, the elastic member (1.4) recovers, the base (1) moves away from the top head (2), and the gap (4) is restored.

4. The high-precision cylinder head according to claim 1, characterized in that: A first bolt column (7) is arranged in the first limiting sleeve (5) and in the cushion block (3), one end of the first bolt column (7) is embedded in the cushion block (3), and the other end is provided with a first fixing nut (7.1), and the upper end surface of the first fixing nut (7.1) abuts against the lower end surface of the first limiting sleeve (5); a second bolt column (8) is arranged in the second limiting sleeve (6) and in the top head (2), one end of the second bolt column (8) is embedded in the top head (2), and the other end is provided with a second fixing nut (8.1), and the upper end surface of the second fixing nut (8.1) abuts against the lower end surface of the second limiting sleeve (6).

5. The high-precision cylinder head according to claim 1, characterized in that: The base (1) is provided with a positioning groove (1.5), the positioning groove (1.5) is provided with a positioning column (1.6), the lower end of the positioning column (1.6) is fixed in the positioning groove (1.5), and the upper end is inserted in the cushion block (3).

6. The high-precision cylinder head according to claim 1, characterized in that: The top head (2) comprises a horizontal section (2.1) and a vertical section (2.2), and a thrust ball bearing (9) is arranged between the cushion block (3) and the horizontal section (2.1).

7. A high-precision cylinder head according to claim 6, characterized in that: A radial needle roller bearing (10) is arranged between the cushion block (3) and the vertical section (2.2).

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