A collimator gate driving system and CT host

Abstract

The present invention relates to a collimator gate drive system and a CT mainframe, comprising: a collimator housing (1); a linear guide rail (2), a linear motor (3), a gate (4), a swing rod (5), wherein the swing rod is connected between the gate and the linear motor; the gate is driven to slide by the linear motor; the system adopts a linear motor as a drive, the motor and the gate are arranged in parallel, a swing rod connecting shaft is provided at the center of the gate, and the motor and the gate are connected by the swing rod. When the motor reciprocates linearly, the gate fixed on the guide rail will move forward and backward along the guide rail, thereby realizing stepless adjustment of the gate width. The advantage of the system is that the driving force is designed at the center of the gate, which can effectively avoid the problem of gate lead sheet tilting or asynchronous movement of both sides caused by traditional unilateral drive, and at the same time, the swing rod connection is adopted, which can effectively reduce the stress problem caused by manufacturing error of traditional rigid connection, reduce the requirements for parts processing quality, and simplify assembly adjustment.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical equipment, and in particular relates to a collimator gate driving system and a CT host. Background Art

[0002] The collimator is one of the key components in CT equipment. Its main function is to install the radiation source, control the radiation dose before passing through the patient, and improve the quality of the radiation. The gate positioning accuracy and reliability of the collimator will directly affect the quality of the image.

[0003] With the development of science and technology, the current gate slit width of the collimator has changed from a fixed width to an infinitely adjustable gate width using two gates. The gate drive system usually uses a motor plus a ball screw or a synchronous pulley, which is arranged on the side of the gate and perpendicular to the gate. Since the gate has a certain length, both sides of the gate are installed on linear guides, and the drive system is rigidly connected to one side of the gate, the driving force of the gate will be unbalanced during driving. In addition, the stress generated by the installation error causes the two ends to move asynchronously, and long-term movement will eventually cause the two gates to be non-parallel (the two gates are required to have a high degree of parallelism), thereby affecting the image quality. In order to solve the above problems, the components and assembly of the entire collimation system are usually required to have extremely high precision, so that the cost is greatly increased. However, the problem has not been fundamentally solved. Summary of the invention

[0004] The embodiments of the present invention provide a collimator gate driving system and a CT host to solve the technical problem of unbalanced driving force of a traditional CT gate.

[0005] According to a specific embodiment of the present invention, in a first aspect, the present invention provides a collimator gate driving system, comprising:

[0006] Collimator box 1;

[0007] The linear guide 2 comprises: a first linear guide 21, which is arranged on one side of the collimator housing 1; and a second linear guide 22, which is arranged on a side opposite to the first linear guide 21;

[0008] The linear motor 3 includes: a first linear motor 31, which is arranged on a side adjacent to the linear guide rail 2; a second linear motor 32, which is arranged on a side opposite to the first linear motor 31;

[0009] The gate 4 includes: a first gate 41, which is arranged between the first linear guide 21 and the second linear guide 22, and slides along the first linear guide 21 and the second linear guide 22; a second gate 42, which is arranged between the first linear guide 21 and the second linear guide 22 in parallel with the first gate 41, and slides along the first linear guide 21 and the second linear guide 22;

[0010] The rocker arm 5 includes: a first rocker arm 51, connected between the first gate 41 and the first linear motor 31; the first rocker arm 51 drives the first gate 41 to slide under the drive of the first linear motor 31; a second rocker arm 52, connected between the second gate 42 and the second linear motor 32; the second rocker arm 52 drives the second gate 42 to slide under the drive of the second linear motor 32.

[0011] Optionally, one end of the first swing arm 51 is connected to the center of the first gate 41 , and the other end is connected to the first linear motor 31 ; one end of the second swing arm 52 is connected to the center of the second gate 42 , and the other end is connected to the second linear motor 32 .

[0012] Optionally, the first linear motor 31 includes: a first stator 311, fixed to the collimator housing 1; a first mover 312, arranged on the first stator 311 and sliding longitudinally along the first stator 311; the second linear motor 32 includes: a second stator 321, fixed to the collimator housing 1; a second mover 322, arranged on the second stator 321 and sliding longitudinally along the second stator 321.

[0013] Optionally, it further includes: a first shaft seat 71, which is fixedly disposed on the first mover 312 and slides along with the first mover 312; and a second shaft seat 72, which is fixedly disposed on the second mover 322 and slides along with the second mover 322.

[0014] Optionally, one end of the first rocker arm 51 is connected to the center of the first gate 41 through a first bearing rod, and the other end is connected to the first shaft seat 71 through a second bearing rod; one end of the second rocker arm 52 is connected to the center of the second gate 42 through a third bearing rod 61, and the other end is connected to the second shaft seat 72 through a fourth bearing rod 62.

[0015] Optionally, the first gate 41 is an arc-shaped structure, and one end of the first swing rod 51 is connected to the arc center of the first gate 41; the second gate 42 is an arc-shaped structure, and one end of the second swing rod 52 is connected to the arc center of the second gate 42.

[0016] Optionally, the first linear guide rail 21 and the second linear guide rail 22 are both provided with longitudinal protrusions, and the ends of the first gate 41 and the second gate 42 are both provided with grooves matching with the protrusions, and the protrusions slide along the grooves.

[0017] Optionally, a first rolling bearing is provided between the first swing rod 51 and the first bearing rod and the second bearing rod; a second rolling bearing is provided between the second swing rod 52 and the third bearing rod 61 and the fourth bearing rod 62.

[0018] Optionally, the first swing arm 51 is fixedly connected to the first shaft seat 71 via a first end cover 91 ; and the second swing arm 52 is fixedly connected to the second shaft seat 72 via a second end cover 92 .

[0019] According to a specific embodiment of the present invention, in a second aspect, the present invention provides a CT host, comprising any collimator gate driving system as described above.

[0020] The above solution of the embodiment of the present invention has at least the following beneficial effects:

[0021] The present invention provides a collimator gate drive system and a CT host. The system adopts a linear motor as a drive. The motor and the gate are arranged in parallel. A swing rod connecting shaft is provided at the center of the gate, and the motor and the gate are connected by the swing rod. When the motor reciprocates linearly, the gate fixed on the guide rail will move forward and backward along the guide rail, thereby realizing stepless adjustment of the gate width. The advantage of this system is that the driving force is designed at the center of the gate, which can effectively avoid the problem of gate lead sheet tilt or asynchronous movement on both sides caused by traditional unilateral drive. At the same time, the use of a swing rod connection can effectively reduce the stress problem caused by manufacturing errors in traditional rigid connections, reduce the requirements for parts processing quality, and simplify assembly adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of the collimator gate driving system according to an embodiment of the present invention;

[0024] Figure 2 is a side view of the collimator gate driving system described in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, and unless the context clearly indicates other meanings, "multiple" generally includes at least two.

[0027] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0028] It should be understood that although the terms first, second, third, etc. may be used to describe a certain component in the embodiments of the present application, these certain components should not be limited to these terms. These terms are only used to distinguish certain components. For example, without departing from the scope of the embodiments of the present application, the first certain component may also be referred to as the second certain component, and similarly, the second certain component may also be referred to as the first certain component.

[0029] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0030] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0031] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 As shown, according to the specific implementation of the present invention, the present invention provides a collimator gate drive system. The collimator is one of the key components in the CT device. Its main function is to install the radiation source, control the radiation dose before the patient by opening and closing the gate, and improve the radiation quality. The gate positioning accuracy and reliability of the collimator will directly affect the quality of the image. Among them, CT (Computed Tomography) is electronic computer tomography. Figure 1 and 2 The collimator gate drive system is described in detail.

[0033] According to a specific embodiment of the present invention, a collimator gate drive system provided by the present invention includes: a collimator housing 1, a linear guide rail 2, a linear motor 3, a gate 4 and a rocker arm 5; wherein the collimator housing 1 is used to accommodate components such as the linear guide rail 2, the linear motor 3, the gate 4 and the rocker arm 5.

[0034] like Figure 1 As shown, the linear guide 2 includes: a first linear guide 21, which is arranged on one side of the collimator housing 1; a second linear guide 22, which is arranged on the side opposite to the first linear guide 21; the first linear guide 21 and the second linear guide 22 are both convex structures. It includes a base fixed to the collimator housing 1 and a convex linear guide located on the base.

[0035] The linear motor 3 includes: a first linear motor 31, which is arranged on a side adjacent to the linear guide 2; a second linear motor 32, which is arranged on a side opposite to the first linear motor 31; the first linear guide 21, the second linear guide 22, the first linear motor 31, and the second linear motor 32 form a rectangular structure. The linear motor 3 can provide uniform driving force after receiving the control of the drive system. A linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. It can be regarded as a rotating motor that is radially cut and unfolded into a plane. The optional linear motors include but are not limited to flat-plate, U-groove and tubular structures.

[0036] The gate 4 includes: a first gate 41, which is arranged between the first linear guide 21 and the second linear guide 22, and slides along the first linear guide 21 and the second linear guide 22; a second gate 42, which is arranged between the first linear guide 21 and the second linear guide 22 in parallel with the first gate 41, and slides along the first linear guide 21 and the second linear guide 22; the first gate 41 and the second gate 42 are arranged in parallel, and as an embodiment, the first gate 41 and the second gate 42 are arranged in parallel to form an arc structure. The two ends of the first gate 41 and the second gate 42 respectively have heads, and the lower part of the heads has grooves that cooperate with the raised slide rails of the first linear guide 21 and the second linear guide 22 to slide.

[0037] The rocker arm 5 includes: a first rocker arm 51, connected between the first gate 41 and the first linear motor 31; the first rocker arm 51 drives the first gate 41 to slide under the drive of the first linear motor 31; a second rocker arm 52, connected between the second gate 42 and the second linear motor 32; the second rocker arm 52 drives the second gate 42 to slide under the drive of the second linear motor 32.

[0038] Among them, one end of the first rocker arm 51 is connected to the center of the first gate 41, for example, the arc apex of the first gate 41, and the other end is connected to the first linear motor 31; one end of the second rocker arm 52 is connected to the center of the second gate 42, for example, the arc apex of the first gate 41, and the other end is connected to the second linear motor 32.

[0039] Optionally, the first linear motor 31 includes: a first stator 311, fixed to the collimator housing 1; a first mover 312, arranged on the first stator 311 and sliding longitudinally along the first stator 311; the second linear motor 32 includes: a second stator 321, fixed to the collimator housing 1; a second mover 322, arranged on the second stator 321 and sliding longitudinally along the second stator 321.

[0040] Optionally, it further includes: a first shaft seat 71, which is fixedly disposed on the first mover 312 and slides along with the first mover 312; and a second shaft seat 72, which is fixedly disposed on the second mover 322 and slides along with the second mover 322.

[0041] Optionally, one end of the first rocker arm 51 is connected to the center of the first gate 41 through a first bearing rod (not shown), and the other end is connected to the first shaft seat 71 through a second bearing rod (not shown); one end of the second rocker arm 52 is connected to the center of the second gate 42 through a third bearing rod 61, and the other end is connected to the second shaft seat 72 through a fourth bearing rod 62.

[0042] As an implementation mode, the first gate 41 is an arc-shaped structure, and one end of the first swing rod 51 is connected to the arc center of the first gate 41; the second gate 42 is an arc-shaped structure, and one end of the second swing rod 52 is connected to the arc center of the second gate 42. The first gate 41 and the second gate 42 may also be semi-rectangular structures, broken line structures, etc., and the specific shapes are not limited.

[0043] Optionally, a first rolling bearing is provided between the first swing rod 51 and the first bearing rod and the second bearing rod; a second rolling bearing is provided between the second swing rod 52 and the third bearing rod 61 and the fourth bearing rod 62, so that the swing rod can rotate more flexibly.

[0044] Optionally, the first swing rod 51 is fixedly connected to the first shaft seat 71 through a first end cover 91, and the second swing rod 52 is fixedly connected to the second shaft seat 72 through a second end cover 92. The first end cover 91 and the second end cover 92 are used to fasten the first swing rod 51 and the second swing rod 52.

[0045] The collimator gate drive system provided by the present invention has two parallel gates, under the control of a control device (not shown), driven by a linear motor and under the linkage action of a rocker arm, to achieve regular stepless regulation. The adjustment frequency and gate gap can be programmed and set through the control system, which will not be introduced in detail and can be controlled in combination with existing control methods.

[0046] The present invention provides a collimator gate driving system, which adopts a linear motor as a drive. The motor and the gate are arranged in parallel. A swing rod connecting shaft is provided at the center of the gate, and the motor and the gate are connected by the swing rod. When the motor reciprocates linearly, the gate fixed on the guide rail will move forward and backward along the guide rail, thereby realizing stepless adjustment of the gate width. One of the advantages of this system is that the driving force is designed at the center of the gate, which can effectively avoid the problems of gate lead sheet tilt or asynchronous movement on both sides caused by traditional unilateral drive. At the same time, the use of a swing rod connection can effectively reduce the stress problem caused by manufacturing errors in traditional rigid connections, reduce the requirements for parts processing quality, and simplify assembly adjustment.

[0047] Based on the implementation of the present invention, the present invention provides a CT host, including the collimator gate drive system described in the above embodiment, and components such as a rotation system, a rotation drive component, an electrical component, and an outer cover. The arrangement of components such as a rotation system, a rotation drive component, an electrical component, and an outer cover can refer to the prior art and will not be introduced here.

[0048] The present invention provides a CT mainframe with a collimator gate drive system, which adopts a linear motor as a drive. The motor and the gate are arranged in parallel. A swing rod connecting shaft is provided at the center of the gate, and the motor and the gate are connected by the swing rod. When the motor reciprocates linearly, the gate fixed on the guide rail will move forward and backward along the guide rail, thereby realizing stepless adjustment of the gate width. One of the advantages of this system is that the driving force is designed at the center of the gate, which can effectively avoid the problem of gate lead sheet tilting or asynchronous movement on both sides caused by traditional unilateral drive. At the same time, the use of a swing rod connection can effectively reduce the stress problem caused by manufacturing errors in traditional rigid connections, reduce the requirements for parts processing quality, and simplify assembly adjustment.

[0049] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A collimator gate drive system, characterized in that: include: Collimator housing (1); Linear guide rails (2), including: A first linear guide rail (21) is arranged on one side of the collimator housing (1); A second linear guide rail (22) arranged on a side opposite to the first linear guide rail (21); A linear motor (3), wherein the linear motor (3) comprises a flat plate, a U-shaped groove or a tubular structure, and the linear motor (3) comprises: A first linear motor (31) is arranged on a side adjacent to the linear guide rail (2); A second linear motor (32) is arranged on a side opposite to the first linear motor (31); Gate (4), comprising: A first gate (41) is disposed between the first linear guide rail (21) and the second linear guide rail (22), and slides along the first linear guide rail (21) and the second linear guide rail (22); A second gate (42) is arranged parallel to the first gate (41) between the first linear guide rail (21) and the second linear guide rail (22), and slides along the first linear guide rail (21) and the second linear guide rail (22); The pendulum (5) comprises: A first swing rod (51) connected between the first gate (41) and the first linear motor (31); the first swing rod (51) drives the first gate (41) to slide under the drive of the first linear motor (31); A second swing rod (52) is connected between the second gate (42) and the second linear motor (32); the second swing rod (52) drives the second gate (42) to slide under the drive of the second linear motor (32); One end of the first swing rod (51) is connected to the center of the first gate (41), and the other end is connected to the first linear motor (31); One end of the second swing rod (52) is connected to the center of the second gate (42), and the other end is connected to the second linear motor (32); The first linear motor (31) comprises: A first stator (311) is fixed to the collimator housing (1); A first mover (312) is disposed on the first stator (311) and slides longitudinally along the first stator (311); The second linear motor (32) comprises: A second stator (321) is fixed to the collimator housing (1); The second mover (322) is arranged on the second stator (321) and slides longitudinally along the second stator (321).

2. The collimator gate drive system according to claim 1, characterized in that: Also includes: A first shaft seat (71) is fixedly disposed on the first mover (312) and slides along with the sliding of the first mover (312); The second shaft seat (72) is fixedly disposed on the second mover (322) and slides along with the sliding of the second mover (322).

3. The collimator gate drive system according to claim 2, characterized in that: One end of the first swing rod (51) is connected to the center of the first gate (41) via a first bearing rod, and the other end is connected to the first shaft seat (71) via a second bearing rod; One end of the second swing rod (52) is connected to the center of the second gate (42) via a third bearing rod (61), and the other end is connected to the second shaft seat (72) via a fourth bearing rod (62).

4. The collimator gate drive system according to claim 1, characterized in that: The first gate (41) is an arc-shaped structure, and one end of the first swing rod (51) is connected to the center of the arc of the first gate (41); The second gate (42) is an arc-shaped structure, and one end of the second swing rod (52) is connected to the center of the arc of the second gate (42).

5. The collimator gate drive system according to claim 1, characterized in that: The first linear guide rail (21) and the second linear guide rail (22) are both provided with longitudinal protrusions, and the ends of the first gate (41) and the second gate (42) are both provided with grooves matching the protrusions, and the protrusions slide along the grooves.

6. The collimator gate driving system according to claim 3, characterized in that: A first rolling bearing is provided between the first swing rod (51) and the first bearing rod and the second bearing rod; A second rolling bearing is provided between the second swing rod (52) and the third bearing rod (61) and the fourth bearing rod (62).

7. The collimator gate drive system according to claim 3, characterized in that: The first swing rod (51) is fixedly connected to the first shaft seat (71) via a first end cover (91); The second swing rod (52) is fixedly connected to the second shaft seat (72) via a second end cover (92).

8. A CT host, characterized in that: It comprises a collimator gate drive system as described in any one of claims 1-7.

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