Pull rod assembly

Abstract

The utility model discloses a pull rod assembly, which belongs to the technical field of equipment tooling, and comprises a pull rod screw rod, a hoisting nut and a pull rod nut, the hoisting nut is used for being pre-installed on a diffuser, and the pull rod nut is used for being installed on a back plate; the pull rod screw comprises a rod body, a pull rod head and a pull rod tail, and the pull rod head and the pull rod tail are connected to the two ends of the rod body respectively; the head of the pull rod is detachably connected with the hoisting nut, the tail of the pull rod is in threaded connection with the pull rod nut, and the pull rod nut is screwed to drive the hoisting nut and the diffuser to be pulled upwards. According to the utility model, the traditional screw structure can be replaced, the pull rod screw and the diffuser are convenient to disassemble through the hoisting nut structure, the pull rod screw can be prevented from being in direct contact with the diffuser, the damage of the pull rod screw to the diffuser is prevented, and the condition that the pull rod screw is in direct threaded connection with the diffuser and is blocked is also eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment tooling, and more specifically, to a pull rod assembly. Background Art

[0002] In the machine table of a liquid crystal display panel PECVD device, the four sides of the diffuser are first fixed to the "back plate" through skirt edges, and there are several through holes on the top "back plate" (threaded holes are machined at the corresponding positions of the diffuser). Most of the existing structures are to pass a screw through the through hole of the back plate, one end of the screw is directly fixed to the threaded hole of the diffuser, and the other end is fixed to the back plate through a nut.

[0003] However, there are many disadvantages in connecting the back plate and the diffuser with a screw. For example: 1. It is difficult to pair and tighten the screw with the threaded hole of the diffuser when the screw passes through the back plate; 2. When installing the screw, it is easy to collide with the back plate / diffuser and cause damage; 3. After the temperature of the equipment usage environment alternates between hot and cold, the thread of the screw and the diffuser is easy to get stuck; 4. After the screw is stuck, it is difficult to take out the screw, and it is easy to cause damage to the back plate / diffuser. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pull rod assembly, which solves the problem that when the back plate and the diffuser are connected by a screw in the prior art, after the temperature of the equipment usage environment alternates between hot and cold, the thread of the screw and the diffuser is easy to get stuck, resulting in difficulty in taking out the screw and easy damage to the back plate / diffuser.

[0005] To achieve the above purpose, the utility model provides a pull rod assembly, which includes a pull rod screw, a hoisting nut and a pull rod nut. The hoisting nut is used for pre-installation on the diffuser, and the pull rod nut is used for installation on the back plate; the pull rod screw includes a rod body, a pull rod head and a pull rod tail, and the pull rod head and the pull rod tail are respectively connected to both ends of the rod body; the pull rod head is detachably connected to the hoisting nut, and the pull rod tail is threadedly connected to the pull rod nut. By screwing the pull rod nut, the hoisting nut and the diffuser are driven to be pulled upward.

[0006] Further, the hoisting nut includes a nut head and a nut tail, and the nut head and the nut tail are of an integral structure; the nut tail is fixedly installed on the diffuser, and the nut head is detachably connected to the pull rod head.

[0007] Further, the nut head is provided with a card slot and a limiting slot, and the card slot communicates with the limiting slot; the shape of the card slot matches that of the pull rod head, and the pull rod head passes through the card slot and rotates to be engaged with the limiting slot.

[0008] Further, a limiting device is arranged at the edge of the limiting slot, and the limiting device limits the pull rod head.

[0009] Further, the limiting device includes two limiting pins, which are symmetrically arranged about the center of the nut head.

[0010] Further, the nut tail is of a cylindrical structure, and an external thread is provided on the cylindrical surface of the nut tail.

[0011] Further, the pull rod nut includes a threaded through hole, and the tail of the pull rod is threadedly connected to the pull rod nut through the threaded through hole.

[0012] Further, at least two disassembly and assembly holes are provided on the end face of the pull rod nut, and the two disassembly and assembly holes are symmetrically arranged about the center of the threaded through hole.

[0013] Adopting the technical solution provided by the present utility model, compared with the existing well-known technologies, it has the following beneficial effects:

[0014] For a pull rod assembly of the present utility model, a hoisting nut is pre-installed on the diffuser, a pull rod nut is installed on the back plate, the pull rod screw is detachably connected to the hoisting nut through the pull rod head, and is threadedly connected to the pull rod nut through the pull rod tail. The pull rod assembly connects the diffuser and the back plate, replacing the traditional screw structure. With the hoisting nut structure, the pull rod screw can be conveniently disassembled from the diffuser, which can avoid the direct contact between the pull rod screw and the diffuser, prevent damage to the diffuser caused by the pull rod screw, and also eliminate the situation of jamming caused by the direct threaded connection between the pull rod screw and the diffuser.

[0015] Obviously, the elements or features described in the above individual embodiments can be used alone or in combination in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the drawings, the dimensions and ratios do not represent the dimensions and ratios of the actual products. The drawings are merely illustrative, and some non-essential elements or features are omitted for clarity.

[0017] Figure 1 is a schematic connection structure diagram of the pull rod screw with the back plate and the diffuser in an embodiment of the present utility model;

[0018] Figure 2 is a three-view drawing of the structure of the pull rod screw in an embodiment of the present utility model;

[0019] Figure 3 is a schematic connection structure diagram (I) of the pull rod screw with the hoisting nut in an embodiment of the present utility model;

[0020] Figure 4 is a schematic connection structure diagram (II) of the pull rod screw with the hoisting nut in an embodiment of the present utility model;

[0021] Figure 5 is a schematic cross-sectional structure diagram of the hoisting nut in an embodiment of the present utility model;

[0022] Figure 6 It is a schematic structural diagram of one side of the card slot of the lifting nut in the embodiment of the present utility model;

[0023] Figure 7 It is a schematic assembly structural diagram of the head of the pull rod and the card slot in the embodiment of the present utility model;

[0024] Figure 8 It is a schematic structural diagram of the engagement state of the head of the pull rod and the limiting device in the embodiment of the present utility model;

[0025] Figure 9 It is a schematic structural diagram of the pull rod nut in the embodiment of the present utility model;

[0026] Figure 10 It is a schematic cross-sectional structural diagram of the pull rod nut in the embodiment of the present utility model.

[0027] Description of the reference numerals

[0028] Reference numeral 100, pull rod screw; 110, rod body; 120, head of the pull rod; 130, tail of the pull rod; 200, lifting nut; 210, nut head; 211, card slot; 212, limiting slot; 220, nut tail; 230, limiting device; 300, pull rod nut; 310, threaded through hole; 320, disassembly and assembly hole; 400, diffuser; 500, back plate. Detailed implementation manners

[0029] Next, the present utility model will be described in detail with reference to the accompanying drawings. What is described here is only the preferred embodiment of the present utility model. Those skilled in the art can think of other ways to implement the present utility model based on the preferred embodiment, and these other ways also fall within the scope of the present utility model.

[0030] Embodiment

[0031] Refer to Figures 1 - 10, this embodiment provides a tie rod assembly, including a tie rod screw 100, a hoisting nut 200, and a tie rod nut 300. The hoisting nut 200 is used for pre-installation on the diffuser 400, and the tie rod nut 300 is used for installation on the back plate 500; the tie rod screw 100 includes a rod body 110, a tie rod head 120, and a tie rod tail 130. The tie rod head 120 and the tie rod tail 130 are respectively connected to both ends of the rod body 110; the tie rod head 120 is detachably connected to the hoisting nut 200, and the tie rod tail 130 is threadedly connected to the tie rod nut 300. Turning the tie rod nut 300 drives the hoisting nut 200 and the diffuser 400 to be pulled up. The tie rod screw 100 is detachably connected to the hoisting nut 200 through the tie rod head 120 and is threadedly connected to the tie rod nut 300 through the tie rod tail 130. The tie rod assembly connects the diffuser 400 and the back plate 500, replacing the traditional screw structure. Through the hoisting nut 200 structure, the tie rod screw 100 can be disassembled from the diffuser 400 conveniently, which can avoid the direct contact between the tie rod screw 100 and the diffuser 400, prevent the tie rod screw 100 from damaging the diffuser 400, and also eliminate the situation of jamming caused by the direct threaded connection between the tie rod screw 100 and the diffuser 400.

[0032] Specifically, as Figure 2 shown, the hoisting nut 200 includes a nut head 210 and a nut tail 220, and the nut head 210 and the nut tail 220 are of an integral structure. The integral structure is convenient for processing and has better structural stability. The nut tail 220 is fixedly installed on the diffuser 400. Specifically, by opening a threaded hole on the diffuser 400, the nut tail 220 is fixed to the diffuser 400 through threads. The nut head 210 is detachably connected to the tie rod head 120, which is convenient for the separation of the tie rod screw 100 and the diffuser 400.

[0033] It can be understood that there are many types of detachable structures for realizing the separation of the tie rod screw 100 and the hoisting nut 200. In some embodiments of the present application, as Figure 2 and Figure 3 shown, the nut head 210 is provided with a card slot 211 and a limit slot 212, and the card slot 211 communicates with the limit slot 212; the shape of the card slot 211 matches the shape of the tie rod head 120, and the tie rod head 120 passes through the card slot 211 and rotates to engage with the limit slot 212. When it is necessary to connect the tie rod screw 100 and the hoisting nut 200, press the tie rod head 120 into the card slot 211 and then rotate the tie rod screw 100.

[0034] Furthermore, as Figure 4 、 Figure 5 and Figure 6As shown, a limiting device 230 is provided at the edge of the limiting groove 212, and the limiting device 230 limits the head of the pull rod 120. When connecting the pull rod screw 100 and the hoisting nut 200, it prevents the pull rod screw 100 from rotating excessively, resulting in the separation of the pull rod screw 100 and the hoisting nut 200, and improves the connection stability between the two. Specifically, the limiting device 230 includes two limiting pins, and the two limiting pins are symmetrically arranged about the center of the nut head 210, which can increase the arc distance between the two limiting pins as much as possible, so that the head of the pull rod 120 has enough rotation space, fully increases the contact area between the head of the pull rod 120 and the limiting groove 212, and improves the connection strength between the head of the pull rod 120 and the limiting groove 212. In addition, the cost of the hoisting nut 200 is relatively low. When the thread of the diffuser 400 is damaged, only the hoisting nut 200 needs to be replaced. Through the thread tightening direction, the head of the pull rod 120 cooperates with the limiting groove 212 and the limiting pins to realize the fastening and separation of the pull rod screw 100 and the hoisting nut 200.

[0035] It can be understood that the nut tail 220 is a cylindrical structure, and an external thread is provided on the cylindrical surface of the nut tail 220. By providing a threaded hole on the diffuser 400, the hoisting nut 200 is connected to the threaded hole of the diffuser 400 through the nut tail 220, realizing the fixed installation of the hoisting nut 200 and the diffuser 400.

[0036] In some embodiments of the present application, such as Figure 9 and Figure 10 As shown, the pull rod nut 300 includes a threaded through hole 310, and an external thread matching the threaded through hole 310 is provided on the outer side of the tail of the pull rod 130. The tail of the pull rod 130 is threadedly connected to the pull rod nut 300 through the threaded through hole 310. The pull rod nut 300 is movably installed in the back plate 500, and the pull rod nut 300 can rotate around its own center. Rotating the pull rod nut 300 can drive the pull rod screw 100 to move up and down.

[0037] Furthermore, as Figure 10 shown, two disassembly and assembly holes 320 are provided on the end face of the pull rod nut 300, and the two disassembly and assembly holes 320 are symmetrically arranged about the center of the threaded through hole 310. Through the two symmetrically arranged disassembly and assembly holes 320, the pull rod nut 300 can be removed and installed more conveniently, which is convenient for maintenance. It can be understood that the pull rod nut 300 can be rotated and removed through the disassembly and assembly holes 320 using tools, or rotated through the disassembly and assembly holes 320 first and then pulled out. In the embodiments of the present application, an external thread is provided on the outer side of the pull rod nut 300, and it is installed in the back plate 500 by rotating. In actual use cases, such as Figure 7 and Figure 8As shown, tighten the tie rod nut 300 clockwise to drive the tie rod screw 100 to hoist the nut 200 and the diffuser 400 upward. While loosen the tie rod nut 300 counterclockwise, screw out the limit groove 212, and the tie rod screw 100 can easily disengage from the hoisting nut 200 to complete the disassembly.

[0038] In a PECVD equipment machine, generally includes a diffuser 400, a backplane 500 and the above-mentioned tie rod assembly, and the tie rod assembly connects the diffuser 400 and the backplane 500. The tie rod assembly replaces the traditional screw structure and can eliminate many disadvantages of directly connecting the screw to the diffuser 400.

[0039] Furthermore, as Figure 1 shown, the tie rod assembly is installed at the central position of the diffuser 400, and the flatness from the center of the diffuser 400 to the four corners is 2 mm to 2.5 mm. By tightening and pulling the diffuser 400 with the tie rod nut 300 at the uppermost end, the flatness of the diffuser 400 from the center to the four corners can be adjusted to 3 mm to 4 mm to meet the equipment usage requirements.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "up", "down", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] The protection scope of the present invention is only defined by the claims. Benefiting from the teachings of the present invention, those skilled in the art can easily recognize that alternative structures of the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to produce new embodiments, which also fall within the scope of the appended claims.

Claims

1. A pull rod assembly, characterized in that, It includes a pull rod screw (100), a hoisting nut (200) and a pull rod nut (300). The hoisting nut (200) is used for pre-installation on a diffuser (400), and the pull rod nut (300) is used for installation on a back plate (500). The pull rod screw (100) includes a rod body (110), a pull rod head (120) and a pull rod tail (130). The pull rod head (120) and the pull rod tail (130) are respectively connected to both ends of the rod body (110). The pull rod head (120) is detachably connected to the hoisting nut (200), and the pull rod tail (130) is threadedly connected to the pull rod nut (300). By screwing the pull rod nut (300), the hoisting nut (200) and the diffuser (400) are pulled upwards.

2. The pull rod assembly according to claim 1, wherein, The hoisting nut (200) includes a nut head (210) and a nut tail (220). The nut head (210) and the nut tail (220) are of an integral structure. The nut tail (220) is fixedly installed on the diffuser (400), and the nut head (210) is detachably connected to the pull rod head (120).

3. The pull rod assembly according to claim 2, characterized in that, The nut head (210) is provided with a card slot (211) and a limit slot (212). The card slot (211) communicates with the limit slot (212). The card slot (211) matches the shape of the pull rod head (120). The pull rod head (120) passes through the card slot (211) and rotates to engage with the limit slot (212).

4. A drawbar assembly according to claim 3, characterized in that, A limit device (230) is arranged at the edge of the limit slot (212), and the limit device (230) limits the pull rod head (120).

5. A pull rod assembly according to claim 4, characterized in that, The limit device (230) includes two limit pins, and the two limit pins are symmetrically arranged about the center of the nut head (210).

6. A drawbar assembly according to claim 2, characterized in that, The nut tail (220) is of a cylindrical structure, and an external thread is provided on the cylindrical surface of the nut tail (220).

7. A pull rod assembly according to claim 1, characterized in that, The pull rod nut (300) includes a threaded through hole (310), and the pull rod tail (130) is threadedly connected to the pull rod nut (300) through the threaded through hole (310).

8. A pull rod assembly according to claim 7, characterized in that, At least two disassembly and assembly holes (320) are arranged on the end face of the pull rod nut (300), and the two disassembly and assembly holes (320) are symmetrically arranged about the center of the threaded through hole (310).

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