Rotation structure for controlling machine head assembly

Abstract

The utility model relates to a rotating structure for controlling a machine head assembly. The rotating structure comprises a rotating component, a braking component and a fixing component. The rotating part is used for controlling the machine head assembly to rotate and comprises a rotating shaft and a rotating shaft flange, and the rotating shaft flange is arranged at one end of the rotating shaft; the fixing part comprises a base, and the base is connected to the rotating shaft in a sleeving mode. The braking component is used for applying braking force to the rotating shaft and comprises a shaft sleeve and a pre-tightening assembly, the shaft sleeve is arranged between the rotating shaft and the base, the inner diameter of the shaft sleeve is attached to the outer diameter of the rotating shaft, and the side face of the shaft sleeve is attached to the rotating shaft flange and used for providing friction damping force; the pre-tightening assembly is located on the side, away from the rotating shaft flange, of the rotating shaft and used for applying pre-tightening force to the base so that the shaft sleeve can be tightly attached to the rotating shaft flange. According to the structure, the pressure on the shaft sleeve is adjusted through the pre-tightening assembly, so that friction between the rotating shaft flange and the base is changed, control over rotating damping of the rotating structure is achieved, and the applicability of the rotating mechanism is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of X-ray photography system, in particular to a rotating structure for controlling a head assembly. BACKGROUND

[0002] In the field of X-ray photography system, the rotation of the head assembly is one of the key technologies to realize multi-angle shooting. At present, in order to maintain the stability of the head during rotation, a pure mechanical damping structure or a brake scheme is usually adopted. However, both of the two traditional schemes have certain deficiencies, which restrict the performance improvement and use experience of the X-ray photography system.

[0003] For the related technologies in the above, although the pure mechanical damping structure can provide stable damping force, it often feels heavy, which brings inconvenience to the operator. This scheme may increase the burden of the operator and affect the work efficiency in the long-term use. On the other hand, although the brake scheme can facilitate the rotation operation of the head assembly after unlocking, it is often limited by its volume and cannot provide sufficient braking force. This may result in that the stability of the head assembly cannot be guaranteed in a specific application scenario, thereby affecting the imaging quality.

[0004] Therefore, how to maintain the stability of the head assembly while realizing moderate operation feeling and meeting the higher braking force demand has become a technical problem to be solved in the current X-ray photography system field. CONTENT OF THE INVENTION

[0005] In order to cooperate with the use of small brake, provide sufficient braking force, and maintain the stability of the head, the present application provides a rotating structure for controlling a head assembly.

[0006] The present application provides a rotating structure for controlling a head assembly. The following technical scheme is adopted:

[0007] A rotating structure for controlling a head assembly comprises:

[0008] A rotating component for controlling the rotation of the head assembly, the rotating component comprising a rotating shaft and a rotating shaft flange, the rotating shaft flange being arranged at one end of the rotating shaft;

[0009] A fixed component comprising a base, the base being sleeved on the rotating shaft;

[0010] A braking component for applying a braking force to the rotating shaft, the braking component comprising a shaft sleeve and a pre-tightening assembly, the shaft sleeve being arranged between the rotating shaft and the base, the inner diameter of the shaft sleeve being fitted with the outer diameter of the rotating shaft, the side surface of the shaft sleeve being fitted with the rotating shaft flange for providing a friction damping force, the pre-tightening assembly being located on the side of the base away from the rotating shaft flange for applying a pre-tightening force to the base so that the shaft sleeve is tightly fitted with the rotating shaft flange.

[0011] By adopting the technical scheme, when the head rotates, the shaft sleeve and the rotating shaft and the rotating shaft flange move relatively to provide an initial damping force, meet the braking demand, and realize moderate operation feeling. The shaft sleeve contacts the rotating shaft and the rotating shaft flange on two sides, and because the rotating shaft and the rotating shaft flange are relatively fixed, the shaft sleeve can generate greater damping force through more contact area. By adjusting the pre-tightening assembly, the pre-tightening force acting on the base can be adjusted, and then the friction between the shaft sleeve and the rotating shaft flange can be flexibly controlled, so that the rotating structure has a better applicable range.

[0012] Preferably, the pre-tightening assembly comprises a disc spring and a pre-tightening nut, the disc spring and the pre-tightening nut are sleeved on the rotating shaft, and the pre-tightening nut is used to adjust the compression amount of the disc spring.

[0013] By adopting the technical scheme, the disc spring provides a constant pre-tightening force under static or dynamic load, prevents the shaft sleeve on the rotating shaft from being displaced in the axial direction of the rotating shaft, and keeps the shaft sleeve closely fitted. Meanwhile, when the pre-tightening force is adjusted, the simple cooperation of the disc spring and the pre-tightening nut makes the operation simple and convenient.

[0014] Preferably, the rotating shaft is designed as a stepped rotating shaft.

[0015] By adopting the technical scheme, each step of the shaft provides a natural positioning point to ensure that accessories such as the rotating shaft flange and the shaft sleeve can be accurately aligned; the shaft head needs to bear a large torque, so the shaft head has a large diameter to provide higher rigidity; the transition part with different diameters can disperse the load, reduce local stress concentration, and improve the fatigue strength and durability of the shaft.

[0016] Preferably, the braking component further comprises an electromagnetic brake, and the electromagnetic brake is connected with the rotating shaft.

[0017] By adopting the technical scheme, when the electromagnetic coil of the electromagnetic brake is electrified, a magnetic field is generated. The magnetic field can attract the metal rotating shaft in contact with the electromagnetic brake to generate a force opposite to the original rotating direction, thereby achieving the braking effect.

[0018] Preferably, the disc spring is sleeved with a shaft ring on both sides.

[0019] By adopting the technical scheme, stable support is provided during installation of the disc spring, the correct position of the disc spring on the shaft is ensured, axial movement of the disc spring is prevented, and the pre-tightening force generated by the disc spring is evenly applied to the shaft sleeve by the shaft rings on both sides.

[0020] Preferably, the fixing component further comprises a connecting seat, the connecting seat is sleeved on the rotating shaft, the connecting seat connects the base on the outside of the pre-tightening assembly, and the connecting seat has an opening capable of exposing the pre-tightening assembly.

[0021] By adopting the technical scheme, the opening can be used to conveniently adjust the pre-tightening nut by using a tool, and the compression state of the disc spring can be observed through the opening, thereby improving the convenience of operation.

[0022] Preferably, the base comprises a base ring, a fixed shell and an elastic seat, the base ring is fixedly sleeved on the rotating shaft, the base ring has a groove, the fixed shell is arranged outside the base ring, the fixed shell has a mounting port for mounting the elastic seat, the elastic seat is mounted in the mounting port, the elastic seat has an expansion device, the expansion device can be clamped with the groove, and when the groove is rotated away from the expansion device, the expansion device is pressed into the elastic seat.

[0023] By adopting the technical scheme, in the absence of external force, the expansion device of the elastic seat protrudes to the surface of the base ring, when the groove of the base ring is rotated to the position corresponding to the expansion device, the expansion device can protrude into the groove, so that the rotation resistance of the rotating shaft changes, and through the change of the rotation resistance, the rotating position of the rotating shaft can be determined, and the need to observe the rotating position is avoided.

[0024] Preferably, the number of the grooves is four, and the grooves are uniformly distributed on the base ring.

[0025] By adopting the technical scheme, the base ring and the expansion device can be well centered, and the clamped rotating distance has a regularity when rotating, so that the operator can conveniently control the head.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] The shaft sleeve contacts the rotating shaft and the rotating shaft flange on both sides, and since the rotating shaft and the rotating shaft flange are relatively fixed, the shaft sleeve can generate greater damping force through more contact area, and the pre-tightening component can adjust the pressure between the shaft sleeve and the rotating shaft flange, thereby controlling the damping force generated by the shaft sleeve, so that the rotating structure has a better application range.

[0028] The application of the electromagnetic brake increases the braking force, and through accurate adjustment of the current size of the electromagnetic brake, fine adjustment of the braking force is realized, thereby meeting the needs of different operation scenes.

[0029] The built-in expansion device of the elastic seat can provide different rotation resistances, so as to determine the rotating position of the rotating shaft through the rotation resistance. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application;

[0031] Figure 2 is a schematic diagram of the exploded structure of the embodiment of the present application;

[0032] Figure 3 is a sectional structure schematic diagram of the embodiment of the application;

[0033] Figure 4 is a structure schematic diagram of the elastic seat and the base ring of the embodiment of the application.

[0034] Mark explanation: 1, rotating part; 11, rotating shaft; 12, rotating shaft flange; 2, fixed part; 21, base; 211, base ring; 212, fixed shell; 213, elastic seat; 214, groove; 215, telescopic device; 216, cover plate; 22, connecting seat; 221, opening; 3, brake part; 31, shaft sleeve; 311, sleeve head; 312, sleeve body; 32, pre-tightening assembly; 321, disc spring; 322, pre-tightening nut; 323, shaft ring; 33, electromagnetic brake; 34, second shaft sleeve; 35, third shaft sleeve. DETAILED DESCRIPTION

[0035] The application will be further described in detail below with reference to the drawings.

[0036] Referring to Figure 1 , the embodiment discloses a rotating structure for controlling a head assembly, which comprises a rotating part 1, a fixed part 2 and a brake part 3. The rotating part 1 comprises a rotating shaft 11 and a rotating shaft flange 12, and the rotating shaft flange 12 is fixed on the end of the rotating shaft 11 by welding. The rotating shaft flange 12 is provided with a connecting hole for connecting an external head assembly, so as to facilitate the installation and fixation of the rotating structure. The rotating shaft 11 is a stepped rotating shaft with a stepped structure, which can limit the position of the components installed on the outside of the rotating shaft 11, so that the rotating structure is more stable.

[0037] Referring to Figure 2 and Figure 3, the fixed component 2 comprises a base 21 and a connecting seat 22, the base 21 and the connecting seat 22 are sleeved on the outer side of the rotating shaft 11, the base 21 and the connecting seat 22 are detachably connected, facilitating the disassembly and installation of the rotating structure. The brake component 3 comprises a shaft sleeve 31, a pre-tightening assembly 32 and an electromagnetic brake 33, the shaft sleeve 31 is arranged between the rotating shaft 11 and the base 21, and is used for providing a certain rotation damping when the rotating shaft 11 rotates, the shaft sleeve 31 comprises a sleeve head 311 and a sleeve body 312, wherein the sleeve body 312 is a cylindrical soft sleeve sleeved on the rotating shaft 11, and the sleeve head 311 is a flaky ring piece connected with the sleeve body 312, the sleeve head 311 is clamped between the base 21 and the rotating shaft flange 12, so that when the rotating component 1 and the base 21 rotate relative to each other, the shaft sleeve 31 can form friction with the rotating shaft 11 and the rotating shaft flange 12 respectively, thereby increasing the rotation damping and making the rotating structure more easily controlled. The pre-tightening assembly 32 is arranged at one end of the base 21 away from the rotating shaft flange 12, and can abut against the base 21 and control the pressure on the base 21, so as to control the pressure of the base 21 on the sleeve body 312, and the rotation damping of the rotating shaft flange 12 during rotation can be controlled, the pre-tightening assembly 32 comprises a disc spring 321, a pre-tightening nut 322 and a shaft ring 323, all of which are sleeved on the outer side of the rotating shaft 11 and surrounded by the connecting seat 22, the disc spring 321 is provided with one shaft ring 323 on each side, the shaft ring 323 on one side is connected with the pre-tightening nut 322, and the shaft ring 323 on the other side abuts against the base 21, the pre-tightening nut 322 can compress the disc spring 321, so as to adjust the pressure on the base 21, and the shaft ring 323 can make the disc spring 321, the base 21 and the pre-tightening nut 322 uniformly contact, so that the pressure generated by the disc spring 321 uniformly acts on the base 21.

[0038] With reference to Figure 2 and Figure 3 , the connecting seat 22 is connected to the base 21 outside the pre-tightening assembly 32, and the connecting seat 22 has an opening 221 capable of exposing the pre-tightening assembly 32, the opening 221 makes the pre-tightening assembly 32 easy to adjust, and facilitates the disassembly of the base 21 and the connecting seat 22 through the opening 221, and the end of the connecting seat 22 away from the base 21 is connected with the electromagnetic brake 33, and the electromagnetic brake 33 is used for braking the rotating shaft 11.

[0039] With reference to Figure 2 and Figure 3 , a second shaft sleeve 34 is further sleeved between the rotating shaft 11 and the base 21, and a third shaft sleeve 35 is arranged between the rotating shaft 11 and the connecting seat 22, the second shaft sleeve 34 and the third shaft sleeve 35 are used for forming friction forces at different positions of the rotating shaft 11, so that the rotation damping is more uniform.

[0040] With reference to Figure 3 and Figure 4The base 21 comprises a base ring 211, a fixed shell 212 and an elastic seat 213. The fixed shell 212 is a support structure of the base. The base ring 211 is fixedly sleeved on the outer side of the rotating shaft 11. The base ring 211 is provided with uniformly distributed grooves 214. The fixed shell 212 is provided with a mounting space for mounting the elastic seat 213. The elastic seat 213 is provided with an expansion device 215 capable of protruding from the elastic seat 213. Under the condition of no external force, the expansion device 215 protrudes from the elastic seat 213. When subjected to pressure, the expansion device 215 is pressed into the elastic seat 213. The expansion device 215 corresponds to the groove 214. When the groove 214 rotates to the position corresponding to the expansion device 215, the expansion device 215 protrudes into the groove 214, so that the rotating shaft 11 generates a difference in rotational resistance when rotating, thereby determining the rotating position through the difference in rotational resistance, and making the rotating structure stop rotating at an accurate position. The top of the elastic seat 213 is further provided with a cover plate 216. The cover plate 216 encloses the elastic seat 213 in the fixed shell 212, so as to avoid external substances from entering the inside of the rotating structure through the elastic seat 213.

[0041] The implementation principle of the embodiment of the present application is that when the rotating part 1 rotates relative to the fixed part 2, the shaft sleeve 31, the second shaft sleeve 34 and the third shaft sleeve 35 are subjected to friction, thereby forming uniform rotational damping. The shaft sleeve 31 comprises a sleeve head 311 and a sleeve body 312. The sleeve body 312 is arranged between the base 21 and the rotating shaft 11. The sleeve head 311 is clamped between the base 21 and the rotating shaft flange 12, thereby forming rotational damping from two directions. The pre-tightening nut 322 can change the pressure of the disc spring 321 on the base 21 by adjusting the compression amount of the disc spring 321, thereby changing the friction between the rotating shaft flange 12 and the base 21, adjusting the rotational damping received by the rotating part 1 when rotating, and increasing the applicability of the rotating structure.

[0042] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Any equivalent transformation and improvement based on the structure, shape or principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotating structure for controlling a handpiece assembly, characterized by, The utility model relates to a rotary component (1) for controlling the rotation of a head assembly, the rotary component (1) comprising a rotating shaft (11) and a rotating shaft flange (12) arranged at one end of the rotating shaft (11), a fixing component (2) comprising a base (21) sleeved on the rotating shaft (11), and a brake component (3) for applying a braking force to the rotating shaft (11), the brake component (3) comprising a shaft sleeve (31) arranged between the rotating shaft (11) and the base (21), the inner diameter of the shaft sleeve (31) being fitted to the outer diameter of the rotating shaft (11), the side surface of the shaft sleeve (31) being fitted to the rotating shaft flange (12) to provide a frictional damping force, and a pre-tightening assembly (32) located on the side of the base (21) away from the rotating shaft flange (12) for applying a pre-tightening force to the base (21) to make the shaft sleeve (31) tightly fitted to the rotating shaft flange (12). The pre-tightening assembly (32) comprises a disc spring (321) and a pre-tightening nut (322), both of which are sleeved on the rotating shaft (11), and the pre-tightening nut (322) is used to adjust the compression amount of the disc spring (321). The rotating shaft (11) is a stepped rotating shaft (11). The brake component (3) further comprises an electromagnetic brake (33) connected to the rotating shaft (11).

2. A rotational structure for controlling a handpiece assembly as defined in claim 1, wherein, The disc spring (321) is sleeved with a shaft ring (323) on both sides.

3. A rotational structure for controlling a handpiece assembly as defined in claim 1, wherein, The fixing component (2) further comprises a connecting seat (22) sleeved on the rotating shaft (11), the connecting seat (22) being connected to the base (21) on the outside of the pre-tightening assembly (32), and the connecting seat (22) having an opening (221) capable of exposing the pre-tightening assembly (32).

4. A rotational structure for controlling a handpiece assembly as defined in claim 1, wherein, The base (21) comprises a base ring (211), a fixing shell (212), and an elastic seat (213), the base ring (211) being fixedly sleeved on the rotating shaft (11), the base ring (211) having a groove (214), the fixing shell (212) being arranged on the outside of the base ring (211), the fixing shell (212) having a mounting opening for mounting the elastic seat (213), the elastic seat (213) being mounted in the mounting opening, the elastic seat (213) having a telescopic device (215) capable of being clamped with the groove (214), and the groove (214) being turned away from the telescopic device (215) so that the telescopic device (215) is pressed into the elastic seat (213).

5. A rotational structure for controlling a handpiece assembly according to claim 2, wherein, The number of the grooves (214) is four, and they are evenly distributed on the base ring (211).

6. A rotational structure for controlling a handpiece assembly as defined in claim 1, wherein, ​ 7. A rotational structure for controlling a handpiece assembly as defined in claim 1, wherein, ​ 8. A rotational structure for controlling a handpiece assembly according to claim 7, wherein, ​

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