Vertical direction adjusting structure with head capable of freely rotating
By designing a vertical direction adjustment structure with freely rotating head, the mechanical structure of linear accelerator is solved, the mechanical structure is unstable, difficult to adjust and high processing cost when adjusting the vertical direction height and supporting the weight of the accelerator structure, and the simple, reliable and effective adjustment effect and centering accuracy are achieved.
Patent Information
- Application Number
- CN202422013800.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-20
AI Technical Summary
In the prior art, when adjusting the vertical height of the linear accelerator and supporting the weight of the accelerator, there are problems such as unstable mechanical structure, difficulty in adjustment and high processing cost.
A vertical direction adjustment structure with free rotation of the head is designed, including a lower fixing plate, a screw, an adjustment nut, an upper fixing nut, a lower fixing nut and an upper fixing plate. The flexible adjustment of the screw is achieved through threaded connections and fish-eye bearings to ensure the centering accuracy and stability of the acceleration tube.
It realizes simple, reliable and effective vertical direction adjustment, increases the adjustment stroke, ensures the centering accuracy of the acceleration tube and the stability of the mechanical structure, and reduces processing costs.
Smart Images
Figure CN223024645U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electron accelerators, in particular to a vertical direction adjustment structure with a freely rotatable head. Background Art
[0002] The collimation and mechanical adjustment of a linear accelerator are very important links for beam output, which play a crucial role in the overall design verification and implementation. The overall weight of the accelerating tube structure is about 1000 kg, so a relatively large supporting force is required to support the entire accelerating tube structure. In addition, the accelerating tube must be centered, and the centering accuracy of a section of the accelerating tube in the entire accelerating structure must be guaranteed to be ±0.05 mm, so the difficulty of height adjustment in the vertical direction is greatly increased. The entire mechanism must achieve two functions: vertical height adjustment and stable support of the overall weight of the accelerating tube.
[0003] The simplest way to solve this problem is to use a screw support. The subsequent problem is the contact problem between the screw and the adjustment surface. Since the centering accuracy requirement of the accelerating tube is relatively high, and the stability requirement of the equipment during operation is also very high. If the stability of the equipment appears problem, the stability of the beam spot during beam output will be greatly affected. Since the upper end face flange of the screw is fixed to the screw, the contact surface with the adjustment upper plate is very likely to be a line contact. The stability of the line contact is certainly not as stable as the surface contact. This structure will cause the mechanical structure to be unstable in the later stage.
[0004] The later improved support method of the structure, that is, a ball head is turned at one end of the screw, so that the lower end face flange will make an angular adjustment with the adjustment of the structure, so as to ensure that the upper end face flange is in surface contact with the connecting plate. But this structure has the following problems. First, adding a ball head to the lower end face of the lower screw makes the structure relatively large and can only be placed on the lower end face. So when adjusting, the supporting screw is not in a vertical state, reducing the load-bearing strength of the screw. Second, the spherical surface is processed by turning, and the matching accuracy between the fixed surface and the spherical surface is insufficient, which will lead to a great increase in the adjustment difficulty. Finally, the screw and the spherical surface are integrally processed, greatly increasing the processing cost and the overall structure is complex. Summary of the Invention
[0005] In view of the above problems, the present invention provides a reliable and effective, simple-structured vertical direction adjustment structure with a freely rotatable head to effectively solve the problems existing in the prior art.
[0006] The specific technical solution is as follows:
[0007] A vertical direction adjustment structure with a freely rotatable head, comprising: a lower fixing plate, a screw rod, an adjusting nut, an upper fixing nut for locking the adjusting nut, a lower fixing nut for locking the lower fixing plate, and an upper fixing plate. The lower fixing plate is threadedly connected to the bottom of the screw rod, the upper fixing plate is rotatably mounted on the upper part of the screw rod, and the lower fixing nut, the adjusting nut, and the upper fixing nut are threadedly connected to the screw rod.
[0008] Further, an angle scale is installed on the lower fixing plate.
[0009] Further, the adjustment structure further includes an adjustment rod. One end of the adjustment rod has an adjustment head, and the adjustment rod can be inserted into the lower fixing nut or the upper fixing nut through the adjustment head.
[0010] Further, a plurality of lower adjustment holes are provided on the lower fixing nut at circumferentially spaced intervals, and the adjustment rod can be inserted into the lower adjustment holes through the adjustment head.
[0011] Further, a plurality of upper adjustment holes are provided on the upper fixing nut at circumferentially spaced intervals, and the adjustment rod can be inserted into the upper adjustment holes through the adjustment head.
[0012] Further, the adjustment structure further includes a spherical bearing. The inner ring of the spherical bearing is sleeved on the smooth rod portion of the upper part of the screw rod, and the outer ring of the spherical bearing is fixedly installed on the upper fixing plate through a bearing pressing plate.
[0013] Further, a plurality of first fixing holes are provided on the lower fixing plate at circumferentially spaced intervals, and the first fixing holes penetrate through the side wall of the lower fixing plate up and down.
[0014] Further, a plurality of second fixing holes are provided on the upper fixing plate at circumferentially spaced intervals, and the second fixing holes penetrate through the side wall of the upper fixing plate up and down.
[0015] The beneficial effects of the above solution are:
[0016] 1) The adjustment structure provided by the present utility model has the advantages of simple structure, reliability and effectiveness;
[0017] 2) In the adjustment structure provided by the present utility model, by setting the adjusting nut and the upper fixing nut, the adjustment structure has a larger adjustment stroke. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic three-dimensional structure diagram of the adjustment structure provided in the embodiment of the present utility model;
[0019] Figure 2 is a schematic cross-sectional structure diagram of the adjustment structure provided in the embodiment of the present utility model.
[0020] In the attached drawings: 1. Lower fixing plate; 2. Angle scale; 3. Lower fixing nut; 4. Adjusting rod; 5. Screw rod; 6. Adjusting nut; 7. Upper fixing nut; 8. Upper fixing plate; 9. Ball eye bearing; 10. Bearing pressing plate. Detailed implementation mode
[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0022] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.
[0023] Next, the present invention will be further described in conjunction with specific embodiments, but it is not a limitation of the present invention.
[0024] As Figure 1 、 Figure 2 shown, the adjustment structure provided in the embodiment of the present invention includes a lower fixing plate 1, a screw rod 5, an adjusting nut 7, an upper fixing nut 8, a lower fixing nut 3 and an upper fixing plate 8. The lower fixing plate 1 is threadedly connected to the bottom of the screw rod 5, the upper fixing plate 8 is rotatably installed on the upper part of the screw rod, and the lower fixing nut 3, the adjusting nut 7 and the upper fixing nut 8 are threadedly connected to the screw rod 5.
[0025] In the above adjustment structure of the present invention, first loosen the lower fixing nut 3, then adjust the lower fixing plate 1 and the upper fixing plate 8. Use the screw rod 5 to press the lower fixing plate 1 and the upper fixing plate 8 against the upper and lower surfaces of the structure to be supported respectively. Then tighten the adjusting nut 6 and the upper fixing nut 7 tightly in a suitable position. The above position requires both convenient adjustment and ensuring that it is not within the adjustment stroke range; measure the dimension between the lower end surface of the lower fixing plate 1 and the upper end surface of the upper fixing plate 8 with a measuring tool, compare this dimension with the designed dimension, and record the differences that appear; then turn the adjusting nut 6 to make the screw rod 5 rise or fall driven by the adjusting nut 6, ensure that the dimension between the lower end surface of the lower fixing plate 1 and the upper end surface of the upper fixing plate 8 is consistent with the designed dimension, and then while fixing the position of the adjusting nut 6, tighten the lower fixing nut 3 downward, that is, the whole mechanism can be adjusted to the designed position. Finally, fix the lower fixing plate 1 to the supporting structure by using the first fixing holes (which can be stepped holes) penetrating the side wall of the lower fixing plate 1 and arranged at circumferential intervals, and then correspondingly install the accelerator lower backing plate on the upper fixing plate 8 by using the second fixing holes (which can be stepped holes) penetrating the side wall of the upper fixing plate 8 and arranged at circumferential intervals, so as to support the weight of the accelerating tube structure by using the screw rod 5.
[0026] Considering the machining errors of the device and the possible subsequent fine-tuning, in the present utility model, an angle scale 2 can be installed on the lower fixing plate 1, so as to convert the adjusted angle into the dimension in terms of the adjusted height when adjusting the height, thereby recording and determining the fine-tuning amount, and then quickly adjusting according to the above steps.
[0027] Considering that the general wrench is too large and the position of the adjustment structure here is relatively small, in the present utility model, an adjustment rod 4 is further provided. The main body of the adjustment rod 4 is cylindrical, and one end thereof has a stepped adjustment head. The adjustment rod 4 can be inserted into the lower adjustment hole in the lower fixing nut 3 or the upper and lower adjustment holes in the upper fixing nut 8 through the adjustment head. Taking the above adjustment process as an example, after inserting an adjustment rod 4 into the upper and lower adjustment holes in the upper fixing nut 8, keeping the position of the adjustment rod 4 unchanged, then inserting another adjustment rod 4 into the lower adjustment hole in the lower fixing nut 3, and rotating this adjustment rod 4 to lock the lower fixing plate 1 by rotating the lower fixing nut 3 downward to ensure the overall stability of the adjustment structure.
[0028] In the present utility model, the upper fixing plate 8 is rotatably installed on the upper part of the screw rod through a spherical bearing 9
[0029] Specifically, the inner ring of the spherical bearing 9 is sleeved on the smooth rod part of the upper part of the screw rod 5, and the outer ring of the spherical bearing 9 is fixedly installed on the upper fixing plate 8 through a bearing pressing plate 10.
[0030] The above are only the preferred embodiments of the present utility model, and do not limit the implementation manners and protection scope of the present utility model accordingly. For those skilled in the art, it should be able to realize that all the equivalent replacements and obvious changes made by using the content of the specification of the present utility model should be included in the protection scope of the present utility model.
Claims
1. A vertical adjustment structure with a freely rotatable head, characterized in that: include: A lower fixing plate, a screw rod, an adjusting nut, an upper fixing nut for locking the adjusting nut, a lower fixing nut and an upper fixing plate for locking the lower fixing plate, wherein the lower fixing plate is threadedly connected to the bottom of the screw rod, the upper fixing plate is rotatably installed on the upper part of the screw rod, and the lower fixing nut, the adjusting nut and the upper fixing nut are threadedly connected to the screw rod.
2. The vertical direction adjustment structure with freely rotatable head according to claim 1, characterized in that: An angle scale is installed on the lower fixing plate.
3. The vertical direction adjustment structure with freely rotatable head according to claim 1 or 2, characterized in that: The adjustment structure further comprises an adjustment rod, one end of which has an adjustment head, and the adjustment rod can be inserted into the lower fixing nut or the upper fixing nut through the adjustment head.
4. The vertical direction adjustment structure with freely rotatable head according to claim 3, characterized in that: The lower fixing nut is provided with a plurality of lower adjustment holes which are arranged at intervals in the circumferential direction, and the adjustment rod can be inserted into the lower adjustment hole through the adjustment head.
5. The vertical direction adjustment structure with freely rotatable head according to claim 3, characterized in that: The upper fixing nut is provided with a plurality of upper adjustment holes which are arranged at intervals in the circumferential direction, and the adjustment rod can be inserted into the upper adjustment hole through the adjustment head.
6. The vertical direction adjustment structure with freely rotatable head according to claim 1 or 2, characterized in that: The adjustment structure also includes a fisheye bearing, the inner ring of the fisheye bearing is sleeved on the smooth rod portion on the upper part of the screw, and the outer ring of the fisheye bearing is fixedly mounted on the upper fixing plate through a bearing pressure plate.
7. The vertical direction adjustment structure with freely rotatable head according to claim 1 or 2, characterized in that: The lower fixing plate is provided with a plurality of first fixing holes which are arranged in an annular direction and spaced apart from each other. The first fixing holes penetrate the side wall of the lower fixing plate from top to bottom.
8. The vertical direction adjustment structure with freely rotatable head according to claim 1 or 2, characterized in that: The upper fixing plate is provided with a plurality of second fixing holes which are arranged in an annular direction and spaced apart from each other. The second fixing holes penetrate the side wall of the upper fixing plate from top to bottom.