Workpiece placing multilayer rack for spherical surface processing machine

Abstract

The utility model provides a workpiece placing multilayer rack for a spherical surface processing machine, which comprises a mounting rack assembly and a plurality of placing assemblies, and the plurality of placing assemblies are equidistantly mounted on the mounting rack assembly along the vertical direction; wherein the mounting frame assembly comprises a bottom plate and two vertical side plates, the two vertical side plates are symmetrically and fixedly mounted on the upper end face of the bottom plate, and the multiple placing assemblies are mounted between the two vertical side plates at equal intervals in the vertical direction; and the placing assembly comprises a placing plate and a storage box, and second sliding grooves are symmetrically formed in the left end and the right end of the placing plate. The utility model solves the problems that the existing lens has various radians and specifications during processing, various different storage devices are needed to store the lens, the number of the storage devices is large, various lens storage devices are placed beside a spherical surface processing machine, the occupied space is large, and the production cost is low. And in addition, the problem that lenses in the storage equipment are scattered due to mistaken touch in the later period is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lens placing devices, in particular to a multi-layer frame for placing workpieces of a spherical surface processing machine. Background Art

[0002] A lens is a lens with a curvature on the surface. Different sizes of curvature on the lens surface represent different light transmittances of the lens. During lens processing, a spherical processing machine is required to avoid grinding the lens. In existing lens processing, lenses with different curvatures often need to be transported and stored in storage devices after production. The curvatures of lenses vary during processing, and different storage components are required for storage.

[0003] However, due to the various curvatures of lenses during processing, different storage pieces are required for storage. There are a large number of these different storage devices. Various lens storage pieces are placed next to the spherical processing machine, which takes up a lot of space, resulting in a reduction in the operating space around the spherical processing machine. In the later operation, it is easy to accidentally touch the storage piece, causing the stored lenses to scatter.

[0004] The authorized patent with application number: 202321090235.5 includes storage parts, placement parts and display parts. The storage parts include a bottom frame and a slide groove frame, wherein the bottom frame is horizontally arranged, and rollers are fixedly connected to the bottom surface of the bottom frame, and two slide groove frames are vertically fixed on both sides of the top surface of the bottom frame in a vertically symmetrical manner. A plurality of slide grooves are horizontally opened on the vertical end surfaces of the slide groove frames adjacent to both sides of the bottom frame in the vertical direction, and a plurality of placement parts are installed in the slide groove frame for horizontal sliding insertion directly above the bottom frame, and a display part is arranged at the bottom of the front end surface of the bottom frame.

[0005] The above-mentioned comparative documents have the following problems:

[0006] There is no limiting structure between the slide groove and the slide plate, which makes it easy for the slide plate to slide between the slide groove, thus affecting the stability of the placement of the slide plate; after the screw barrel is rotated and adjusted to an appropriate position, there is no limiting function for it, which makes the screw barrel still able to rotate, thus affecting the stability of the lifting plate after the height is adjusted, thereby affecting the stability of the placement of the placed parts.

[0007] In summary, the present application now proposes a spherical surface processing machine with a multi-layer rack for placing workpieces to solve the above-mentioned problems. Utility Model Content

[0008] In view of this, the purpose of the present invention is to provide a multi-layer workpiece placement rack for a spherical surface processing machine to solve the problems raised in the above-mentioned background technology.

[0009] Based on the above purpose, the utility model provides a multi-layer workpiece placement rack for a spherical surface processing machine, including a mounting rack component and a placement component, wherein the placement component is provided with a plurality of components, and the plurality of placement components are equidistantly installed on the mounting rack component in the vertical direction;

[0010] The mounting frame assembly includes a bottom plate and a vertical side plate, wherein two vertical side plates are provided, the two vertical side plates are symmetrically fixedly mounted on the upper surface of the bottom plate, and a plurality of placement assemblies are equidistantly mounted between the two vertical side plates along the vertical direction;

[0011] The placement component includes a placement plate and a storage box. The placement plate is symmetrically provided with second slide grooves at the left and right ends, and the two second slide grooves are respectively slidably mounted on the two first fixed sliders along the front-back direction. The two first fixed sliders are respectively fixedly installed on one end surface of two vertical side plates close to each other. There are multiple storage boxes, and the multiple storage boxes are evenly installed on the upper end of the placement plate. The upper end of the storage box is open, and a rubber sleeve is detachably installed in the storage box, and the upper end of the rubber sleeve is open.

[0012] Preferably, the mounting frame assembly further comprises a first universal wheel, four of which are provided and are mounted on the lower end surface of the base plate in a rectangular array.

[0013] More preferably, the display assembly also includes an installation screw hole, and a plurality of the installation screw holes are provided. The plurality of installation screw holes are evenly arranged on the display plate, and the plurality of installation screw holes correspond one-to-one to the plurality of storage boxes. The bottom of the storage box is provided with threads matching the installation screw holes, and the bottoms of the plurality of storage boxes are respectively threadedly connected to the plurality of installation screw holes.

[0014] Preferably, the mounting frame assembly also includes a limit plate, and a plurality of limit plates are provided. The plurality of limit plates are respectively located above the plurality of placement plates, and a left end surface of the limit plate is fixedly connected to a vertical side plate located at the left end of the placement plate. A first top screw arranged along the vertical direction is threaded through the limit plate, and a lower end of the first top screw is tightly attached to the upper end of the placement plate.

[0015] More preferably, it also includes a placement component, which is installed on the upper end of the base plate and is located below the display component.

[0016] Preferably, the placement assembly includes a driving shell, a supporting leg and a second top screw, the driving shell is symmetrically provided with first sliding grooves at left and right ends, the two first sliding grooves are respectively slidably mounted on two second fixed sliding blocks along the front and rear directions, the two second fixed sliding blocks are respectively fixedly connected to two vertical side plates close to one end face, the lower end face of the driving shell is slidingly fitted with the upper end face of the bottom plate, the supporting legs are provided with two, the two supporting legs are symmetrically fixedly installed at the front end of the driving shell and are located on the front side of the bottom plate, a second universal wheel is installed at the lower end of the supporting leg, the second top screw is threadedly penetrated through the driving shell along the vertical direction, and the lower end of the second top screw is tightly attached to the upper end face of the bottom plate.

[0017] More preferably, the placement assembly also includes a two-way screw rod and a placement plate, the front end of the two-way screw rod is rotatably connected to the front end surface of the interior of the drive shell, and the two-way screw rod is located on the rear side of the second top screw, the rear end of the two-way screw rod passes through the rear end of the drive shell and extends to the rear side of the drive shell and is fixedly connected with a handle, the placement plate is installed above the drive shell, and the placement plate is located on the rear side of the second top screw, and two top rods are symmetrically hingedly installed on the lower end of the placement plate, a driving port is opened in the middle position of the upper end of the drive shell, the lower ends of the two top rods pass through the driving port, and are hingedly installed with rectangular nut blocks, the two rectangular nut blocks are symmetrically threaded on the two-way screw rod, the rectangular nut block slides and fits with the bottom end of the drive shell in the front and rear direction, and four vertical guide rods are fixedly installed on the lower end of the placement plate in a rectangular array, and the lower ends of the vertical guide rods slide in the vertical direction and pass through the top end of the drive shell.

[0018] Preferably, the placement assembly also includes a locking nut, the locking nut is threadedly mounted on the bidirectional screw rod, and the locking nut is located on the rear side of the drive housing.

[0019] From the above description, it can be seen that the beneficial effects of the utility model are:

[0020] 1. This kind of spherical surface processing machine uses a multi-layer rack for placing workpieces. When using the spherical surface processing machine to process the lens, first loosen the second top screw, then pull the drive shell forward, use the second universal wheel to make the drive shell move forward stably, and then place the placement component horizontally on the placement plate, and rotate the two-way screw rod through the handle, thereby driving the two rectangular nut blocks to move toward each other. The two rectangular nut blocks moving toward each other can lift the placement plate through the top rod, thereby adjusting the height of the placement plate. During adjustment, the vertical guide rod can slide in the vertical direction, which can improve the stability of the placement plate in the vertical direction. After the adjustment is completed, tighten the locking nut to complete the locking of the two-way screw rod, thereby completing the locking of the placement plate. Through the above design, the height of the placement component can be adjusted according to the comfort needs of the staff for placing the lens.

[0021] 2. This type of spherical surface processing machine uses a multi-layer rack for placing workpieces. When in use, first select a rubber sleeve with a suitable inner diameter and fill it in the storage box according to the size of the lens to be stored. After the rubber sleeve is installed, insert the storage box thread into the mounting screw hole of the placement plate to complete the installation of the storage box. Then place the placement assembly horizontally on the drive housing, and then place the lenses processed by the spherical surface processing machine in the storage box one by one.

[0022] 3. This type of spherical surface processing machine uses a multi-layer rack for placing workpieces. After the storage boxes are full, the placing plate is installed on the mounting frame assembly. Specifically, after the storage boxes are installed on the inverted placing plate, the second slide grooves at both ends of the placing plate can be slid along the front and rear directions and installed on the two first fixed sliders that match them, and then the first top screw is tightened so that the lower end of the first top screw is tightly attached to the upper end of the placing plate, thereby completing the process of installing the placing plate on the mounting frame assembly.

[0023] The utility model solves the problem that the existing lenses have various curvature specifications during processing, and various different storage devices are needed to store them, which results in a large number of storage devices. Various lens storage devices are placed next to the spherical processing machine, which occupies a large space and is prone to accidental contact in the later stage, resulting in the lenses in the storage devices being scattered. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the structure of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the mounting frame assembly in the utility model;

[0027] Figure 3 It is a structural schematic diagram of placing components in the utility model;

[0028] Figure 4 It is a partial structural cross-sectional view of the components placed in the utility model;

[0029] Figure 5 It is a partial exploded view of the components in the utility model.

[0030] In the reference numerals: 1. mounting frame assembly; 2. placement assembly; 3. placement assembly;

[0031] 101. bottom plate; 102. vertical side plate; 103. first fixed slider; 104. limit plate; 105. first top screw; 106. first universal wheel;

[0032] 201. driving housing; 202. second top screw; 203. placing plate; 204. bidirectional screw rod; 205. locking nut; 206. second universal wheel; 207. rectangular nut block; 208. driving port; 209. top rod; 210. first slide groove; 211. vertical guide rod;

[0033] 301. Display plate; 302. Second slide slot; 303. Mounting screw hole; 304. Storage box; 305. Rubber sleeve. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0035] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the utility model should be the common meanings understood by people with ordinary skills in the field to which the disclosure belongs. The "first", "second" and similar words used in the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0036] Example

[0037] See also Figure 1-Figure 5 A multi-layer workpiece placing rack for a spherical surface processing machine includes a mounting rack component 1 and a placing component 3, wherein the placing component 3 is provided with a plurality of placing components 3 which are equidistantly installed on the mounting rack component 1 in a vertical direction;

[0038] The mounting frame assembly 1 includes a bottom plate 101 and a vertical side plate 102. Two vertical side plates 102 are provided. The two vertical side plates 102 are symmetrically fixedly installed on the upper end surface of the bottom plate 101, and a plurality of placement assemblies 3 are equidistantly installed between the two vertical side plates 102 in the vertical direction.

[0039] The display assembly 3 includes a display plate 301 and a storage box 304. The display plate 301 is symmetrically provided with second slide grooves 302 at both ends thereof, and the two second slide grooves 302 are respectively slidably mounted on the two first fixed sliders 103 along the front-rear direction. The two first fixed sliders 103 are respectively fixedly mounted on one end surface of the two vertical side plates 102 close to each other. A plurality of storage boxes 304 are provided, and the plurality of storage boxes 304 are evenly mounted on the upper end of the display plate 301. The upper end of the storage box 304 is open, and a rubber sleeve 305 is detachably mounted in the storage box 304, and the upper end of the rubber sleeve 305 is open.

[0040] During use, firstly, a rubber sleeve 305 with a suitable inner diameter is selected and filled into the storage box 304 according to the size of the lens to be stored.

[0041] See also Figure 2 As an improved solution of the above solution, the mounting frame assembly 1 also includes a first universal wheel 106, and four first universal wheels 106 are provided. The four first universal wheels 106 are installed on the lower end surface of the base plate 101 in a rectangular array.

[0042] The utility model can be moved by the first universal wheel 106 .

[0043] See also Figure 5 As an improved solution of the above solution, the display component 3 also includes an installation screw hole 303, and a plurality of installation screw holes 303 are provided. The plurality of installation screw holes 303 are evenly arranged on the display plate 301, and the plurality of installation screw holes 303 correspond one by one to the plurality of storage boxes 304. The bottom of the storage box 304 is provided with a thread matching the installation screw hole 303, and the bottom of the plurality of storage boxes 304 are respectively threadedly connected with the plurality of installation screw holes 303.

[0044] When the rubber sleeve 305 is installed, the storage box 304 is threadedly installed and inserted into the installation screw hole 303 of the placement plate 301 to complete the installation of the storage box 304.

[0045] See also Figure 2 As an improved solution of the above solution, the mounting frame assembly 1 also includes a limit plate 104, and a plurality of limit plates 104 are provided. The plurality of limit plates 104 are respectively located above the plurality of placement plates 301, and the left end surface of the limit plate 104 is fixedly connected to the vertical side plate 102 located at the left end of the placement plate 301. A first top screw 105 arranged along the vertical direction is threaded through the limit plate 104, and the lower end of the first top screw 105 is tightly attached to the upper end of the placement plate 301.

[0046] After the storage box 304 is installed on the inverted placement plate 301, the second slide grooves 302 at both ends of the placement plate 301 can be slid along the front-to-back direction and installed on the two first fixed sliders 103 that match them, and then the first top screw 105 is tightened so that the lower end of the first top screw 105 is tightly attached to the upper end of the placement plate 301, thereby completing the process of installing the placement plate 301 on the mounting frame assembly 1.

[0047] See also Figure 3-Figure 4 As an improved solution of the above solution, it also includes a placement component 2, which is installed on the upper end of the base plate 101 and is located below the placement component 3.

[0048] As an improved solution of the above solution, the placement component 2 includes a drive shell 201, a support leg and a second top screw 202. The drive shell 201 is symmetrically provided with first sliding grooves 210 at both ends. The two first sliding grooves 210 are respectively slidably mounted on the two second fixed sliding blocks along the front and rear directions. The two second fixed sliding blocks are respectively fixedly connected to the two vertical side plates 102 close to one end face. The lower end face of the drive shell 201 is slidably fitted with the upper end face of the base plate 101. Two support legs are provided. The two support legs are symmetrically fixedly installed at the front end of the drive shell 201 and are located on the front side of the base plate 101. A second universal wheel 206 is installed at the lower end of the support leg. The second top screw 202 is threadedly penetrated through the drive shell 201 along the vertical direction, and the lower end of the second top screw 202 is tightly attached to the upper end face of the base plate 101.

[0049] When using the spherical processing machine to process the lens, first loosen the second top screw 202, then pull the drive shell 201 forward, use the second universal wheel 206 to make the drive shell 201 move forward stably, and then place the display component 3 horizontally on the drive shell 201, and then place the lenses processed by the spherical processing machine in the storage box 304 in turn. After the storage box 304 is full, install the display plate 301 on the mounting frame component 1. When storing the lenses processed by the spherical processing machine, the display component 3 holding the lenses is arranged in the vertical direction on the mounting frame component 1, thereby reducing the number of display components 3 placed around the spherical processing machine, avoiding the problem of it occupying more operating space, thereby reducing the effect of accidental contact by the staff.

[0050] As an improved solution of the above solution, the placement component 2 also includes a bidirectional screw rod 204 and a placement plate 203. The front end of the bidirectional screw rod 204 is rotatably connected to the front end surface inside the drive shell 201, and the bidirectional screw rod 204 is located at the rear side of the second top screw 202. The rear end of the bidirectional screw rod 204 passes through the rear end of the drive shell 201 and extends to the rear side of the drive shell 201, and is fixedly connected with a handle. The placement plate 203 is installed above the drive shell 201, and the placement plate 203 is located at the rear side of the second top screw 202. The lower end of the placement plate 203 is symmetrically hingedly installed with Two push rods 209, a drive port 208 is opened in the middle of the upper end of the drive shell 201, the lower ends of the two push rods 209 pass through the drive port 208, and are hingedly installed with a rectangular nut block 207, the two rectangular nut blocks 207 are symmetrically threaded on the bidirectional screw rod 204, the rectangular nut block 207 slides and fits with the bottom end of the drive shell 201 along the front and rear directions, and four vertical guide rods 211 are fixedly installed in a rectangular array at the lower end of the placement plate 203, and the lower ends of the vertical guide rods 211 slide in the vertical direction and pass through the top of the drive shell 201.

[0051] The placement component 3 can be placed horizontally on the placement plate 203 to perform the above-mentioned lens installation operation. When the placement component 3 is placed on the placement plate 203, the bidirectional screw rod 204 can be rotated by the handle, thereby driving the two rectangular nut blocks 207 to move toward each other. The two rectangular nut blocks 207 moving toward each other can lift the placement plate 203 through the push rod 209, thereby adjusting the height of the placement plate 203. During adjustment, the vertical guide rod 211 can slide in the vertical direction, which can improve the stability of the vertical drive of the placement plate 203. After the adjustment is completed, tighten the locking nut 205 to complete the locking of the bidirectional screw rod 204, thereby completing the locking of the placement plate 203. Through the above design, the height of the placement component 3 can be adjusted according to the staff's needs for lens placement comfort.

[0052] As an improved solution of the above solution, the placement component 2 also includes a locking nut 205 , which is threadedly mounted on the bidirectional screw rod 204 , and the locking nut 205 is located at the rear side of the drive housing 201 .

[0053] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. In accordance with the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0054] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-layer workpiece placement rack for a spherical surface processing machine, characterized in that: include: Mounting frame assembly (1); as well as A placement component (3), wherein a plurality of the placement components (3) are provided, and the plurality of placement components (3) are installed on the mounting frame component (1) at equal intervals in the vertical direction; Wherein, the mounting frame assembly (1) comprises: a bottom plate (101); and A vertical side panel (102), wherein two vertical side panels (102) are provided, the two vertical side panels (102) are symmetrically fixedly mounted on the upper end surface of the bottom panel (101), and a plurality of placement components (3) are equidistantly mounted between the two vertical side panels (102) in the vertical direction; The placement component (3) includes: A placement plate (301), wherein the placement plate (301) is symmetrically provided with second slide grooves (302) at both left and right ends, and the two second slide grooves (302) are respectively slidably mounted on the two first fixed sliders (103) in the front-back direction, and the two first fixed sliders (103) are respectively fixedly mounted on the end surfaces of the two vertical side plates (102) close to each other; and A storage box (304), wherein a plurality of the storage boxes (304) are provided, and the plurality of storage boxes (304) are evenly mounted on the upper end of the placement plate (301), the upper end of the storage box (304) is open, and a rubber sleeve (305) is detachably mounted in the storage box (304), and the upper end of the rubber sleeve (305) is open.

2. A multi-layer workpiece placement rack for a spherical surface processing machine according to claim 1, characterized in that: The mounting frame assembly (1) further comprises: The first universal wheels (106) are four in number, and the four first universal wheels (106) are installed on the lower end surface of the bottom plate (101) in a rectangular array.

3. A multi-layer workpiece placement rack for a spherical surface processing machine according to claim 2, characterized in that: The placement component (3) further comprises: A plurality of mounting screw holes (303) are provided, the plurality of mounting screw holes (303) are evenly arranged on the placement plate (301), and the plurality of mounting screw holes (303) correspond one-to-one to the plurality of storage boxes (304), a thread matching the mounting screw holes (303) is provided at the bottom of the storage box (304), and the bottoms of the plurality of storage boxes (304) are respectively threadedly connected to the plurality of mounting screw holes (303).

4. A multi-layer workpiece placement rack for a spherical surface processing machine according to claim 3, characterized in that: The mounting frame assembly (1) further comprises: A limit plate (104), wherein a plurality of limit plates (104) are provided, and the plurality of limit plates (104) are respectively located above the plurality of placement plates (301); a left end surface of the limit plate (104) is fixedly connected to a vertical side plate (102) located at the left end of the placement plate (301); a first top screw (105) arranged in a vertical direction is threadedly penetrated on the limit plate (104); and a lower end of the first top screw (105) is tightly attached to an upper end of the placement plate (301).

5. A multi-layer workpiece placement rack for a spherical surface processing machine according to claim 4, characterized in that: Also includes: A placement component (2), wherein the placement component (2) is installed on the upper end of the bottom plate (101), and the placement component (2) is located below the display component (3).

6. A multi-layer workpiece placement rack for a spherical surface processing machine according to claim 5, characterized in that: The placement component (2) comprises: A driving shell (201), wherein first sliding grooves (210) are symmetrically provided at left and right ends of the driving shell (201), the two first sliding grooves (210) are respectively slidably mounted on two second fixed sliding blocks along the front-back direction, the two second fixed sliding blocks are respectively fixedly connected to one end surface of two vertical side plates (102) close to each other, and the lower end surface of the driving shell (201) is slidably fitted with the upper end surface of the bottom plate (101); Support legs, wherein two support legs are provided, the two support legs are symmetrically fixedly mounted at the front end of the drive housing (201) and located at the front side of the bottom plate (101), and a second universal wheel (206) is mounted at the lower end of the support leg; and A second top screw (202), wherein the second top screw (202) is threadedly penetrated through the drive housing (201) in a vertical direction, and the lower end of the second top screw (202) is tightly attached to the upper end surface of the bottom plate (101).

7. A multi-layer workpiece placement rack for a spherical surface processing machine according to claim 6, characterized in that: The placement component (2) further comprises: a bidirectional screw rod (204), wherein the front end of the bidirectional screw rod (204) is rotatably connected to the front end surface inside the drive housing (201), the bidirectional screw rod (204) is located at the rear side of the second top screw (202), the rear end of the bidirectional screw rod (204) passes through the rear end of the drive housing (201), extends to the rear side of the drive housing (201), and is fixedly connected to a handle; and A placement plate (203) is installed above the drive shell (201), and the placement plate (203) is located at the rear side of the second top screw (202). Two top rods (209) are symmetrically hingedly installed at the lower end of the placement plate (203). A drive opening (208) is opened in the middle of the upper end of the drive shell (201). The lower ends of the two top rods (209) pass through the drive opening (208) and are hingedly installed with rectangular nut blocks (207). The two rectangular nut blocks (207) are symmetrically threadedly mounted on the bidirectional screw rod (204). The rectangular nut blocks (207) are slidably fitted with the bottom end of the drive shell (201) in the front-to-back direction. Four vertical guide rods (211) are fixedly installed in a rectangular array at the lower end of the placement plate (203), and the lower ends of the vertical guide rods (211) slide in the vertical direction and pass through the top end of the drive shell (201).

8. A multi-layer workpiece placement rack for a spherical surface processing machine according to claim 7, characterized in that: The placement component (2) further comprises: A locking nut (205), wherein the locking nut (205) is threadedly sleeved on the bidirectional screw rod (204), and the locking nut (205) is located at the rear side of the drive housing (201).

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