A shaping device and glass processing tool

Abstract

The utility model provides a kind of shaping device, comprising: base frame;Shaping chuck, it is set on base frame by an adjusting device, adjusting device is used to adjust the orientation of shaping chuck;Locking device of unlock, for locking adjusting device to fix shaping chuck on base frame.The utility model among them shaping device simple structure, low in cost, it is easy to install and use, can effectively reduce processing cost and reject rate, guarantee processing quality.The utility model further provides a kind of glass processing frock, including base, base is provided with: positioning device, for positioning glass;Profiling support device, for supporting glass;Fixing device, for fixing glass on base;The utility model among them shaping device, for by its shaping chuck adsorption glass to shape glass.This glass processing frock also has the above advantages.

Description

Technical Field

[0001] This utility model relates to the field of glass processing technology, and particularly to the field of glass processing tooling. Background Technology

[0002] Glass products are widely used in industries such as automobiles. Glass processing often requires finishing or milling of additional structures such as PU edging. For example, the production of automotive sunroofs requires pre-treatment such as milling the inner surface of the PU edging on the sunroof glass. To improve processing accuracy and efficiency, these glass processing operations are now mostly carried out using automated equipment. The process typically involves first conveying the glass product to a predetermined position on a tooling fixture for positioning and fixing, and then using a robotic arm or other moving processing device to perform milling and other processing according to a set program.

[0003] After glass manufacturing, certain errors are inevitable in terms of size and curvature. Since the feed data set for automated equipment is fixed, the actual processing depth is affected by these glass errors, impacting processing quality and potentially leading to glass damage and scrap, thus increasing processing costs. To address these issues, a common approach is to acquire relevant glass parameters using cameras and sensors, and then adjust the feed data of the processing device using appropriate programs. This method effectively ensures processing accuracy and improves yield, but it is also relatively complex and costly. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a shaping device and glass edging processing fixture that helps to reduce processing costs and scrap rates and ensure processing quality.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A shaping device, comprising:

[0007] Base frame;

[0008] A shaping suction cup is mounted on the base frame via an adjustment device, the adjustment device being used to adjust the orientation of the shaping suction cup;

[0009] An unlockable locking device is provided for locking the adjustment device to secure the shaping suction cup to the base frame.

[0010] Preferably, the adjustment device can also adjust the vertical and / or horizontal position of the shaping suction cup.

[0011] Preferably, the adjustment device includes a ball seat, a universal ball, and a slide rod. The ball seat is disposed on the base frame and has a ball cavity adapted to the universal ball. The universal ball is rotatably disposed in the ball cavity. The universal ball has a sliding hole in the middle that is adapted to the slide rod. The slide rod is slidably inserted into the sliding hole. The shaping suction cup is disposed on the slide rod.

[0012] Preferably, the ball seat includes at least two relatively movable sub-seats, each of which together clamps the universal ball; the locking device includes a locking screw mounted on the sub-seat, the locking screw being used to move the sub-seats closer or further apart to clamp or release the universal ball by changing its tightness.

[0013] Preferably, the omnidirectional ball can expand and contract with the movement of each of the sub-seats to clamp or release the slide rod.

[0014] Preferably, the omnidirectional ball has expansion and contraction slots on its side to allow it to expand and contract.

[0015] Preferably, a damping structure is provided between the omnidirectional ball and the ball seat.

[0016] This utility model also provides a glass processing fixture, including a base, on which the following are provided:

[0017] A positioning device used to position glass.

[0018] Contouring support device, used to support glass;

[0019] Fixing device for securing the glass to the base; and,

[0020] The shaping device in this invention is used to shape glass by adsorbing it with the shaping suction cup.

[0021] Preferably, the positioning device includes a main positioning device and a secondary positioning device respectively disposed on opposite sides of the glass conveying direction. The main positioning device includes a main positioning member for abutting against the side of the glass and a main driving device for driving the main positioning member to move laterally. The secondary positioning device includes a secondary positioning member for abutting against the side of the glass and a secondary driving device for driving the secondary positioning member to move laterally. The driving force provided by the main driving device to the main positioning member is greater than the driving force provided by the secondary driving device to the secondary positioning member.

[0022] Preferably, the positioning device further includes a centering clamping device, which includes a centering drive device and a front positioning member and a rear positioning member respectively disposed at the front and rear ends of the glass conveying direction. The centering drive device drives the front positioning member and the rear positioning member to move closer to each other to clamp the glass. Pads can be inserted between the main positioning member and the base, between the secondary positioning member and the base, between the front positioning member and the base, and between the rear positioning member and the base to adjust the height.

[0023] The beneficial effects of this utility model are as follows: The shaping device of this utility model has a shaping suction cup whose orientation can be adjusted by an adjustment device, so that the adsorption surface of the shaping suction cup is parallel to the predetermined shape surface of the glass. Then, the locking device can lock the adjustment device to fix the shaping suction cup. In use, the shaping suction cup can adsorb the glass on the fixture, apply a pulling force to the glass and pull the adsorbed part of the glass to the predetermined position. When there is an error in the adsorption part of the glass, it can cause a slight deformation of the glass to compensate for its shape error, thereby well adapting to the working distance of the processing device. The structure is simple, the cost is low, it can flexibly adjust the orientation to adapt to different processing needs, it is easy to install and use, and can effectively reduce processing costs and scrap rate, and ensure processing quality. The glass processing fixture of this utility model has a positioning device that can accurately position the glass, a fixing device that can fix the glass for processing, and a contour support device that works with the shaping device of this utility model to effectively shape the glass to the predetermined shape, and can well adapt to the working distance of the processing device, thus also having the above advantages. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a structural diagram of a preferred embodiment of the shaping device in this utility model;

[0026] Figure 2 This is a side view of a preferred embodiment of the shaping device in this utility model;

[0027] Figure 3 This is a structural diagram of a preferred embodiment of the glass processing tooling in this utility model;

[0028] Figure 4 for Figure 3 A magnified view of part A in the middle;

[0029] Figure 5 for Figure 3 A magnified view of part B in the middle section;

[0030] Figure 6 for Figure 3 A magnified view of part C in the middle;

[0031] Figure 7 This is a top view of a preferred embodiment of the glass processing tooling in this utility model.

[0032] The following are the labeling elements in the figure:

[0033] 11. Base frame; 121. Ball seat; 1211. Sub-seat body; 122. Universal ball; 1221. Expansion / contraction joint; 123. Slide rod; 13. Locking screw; 14. Shaping suction cup; 20. Base; 31. Main positioning device; 311. Main positioning component; 312. Main drive device; 32. Secondary positioning device; 321. Secondary positioning component; 322. Secondary drive device; 33. Positioning stop; 34. Centering drive device; 341. Front positioning component; 342. Rear positioning component; 35. Vertical drive device; 40. Contouring support device; 51. Lifting seat; 52. Main suction cup; 60. Support device; 61. Support seat; 62. Ball bearing; 63. Support drive device. Detailed Implementation

[0034] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0037] Reference Figure 1 and Figure 2A preferred embodiment of the shaping device in this utility model includes: a base frame 11; a shaping suction cup 14, which is mounted on the base frame 11 via an adjustment device for adjusting the orientation of the shaping suction cup 14; and an unlockable locking device for locking the adjustment device to fix the shaping suction cup 14 on the base frame 11. In this utility model, the shaping suction cup 14 can have its orientation adjusted via the adjustment device, making the adsorption surface of the shaping suction cup 14 parallel to the predetermined shape surface of the glass. The locking device then locks the adjustment device to fix the shaping suction cup 14. In use, the shaping suction cup 14 can adsorb glass from the tooling, applying a pulling force to the glass and pulling the adsorbed area to a predetermined position. When there is an error in the adsorption area of ​​the glass, it can cause a slight deformation of the glass to compensate for the shape error, thus effectively adapting to the feed distance of the processing device. The structure is simple, the cost is low, and it can flexibly adjust its orientation to adapt to different processing needs. It is easy to install and use, effectively reducing processing costs and scrap rates while ensuring processing quality.

[0038] This shaping device can be applied to various glass processing equipment, especially suitable for automotive sunroof glass PU edge milling equipment, automotive windshield processing equipment, etc. During use, the shaping suction cup 14 needs to be connected to an external negative pressure air source to achieve glass adsorption. This type of suction cup is widely used in the field and will not be described in detail here.

[0039] As a preferred embodiment of the shaping device in this utility model, it may also have the following additional technical features:

[0040] The adjustment device can also adjust the vertical and / or horizontal position of the shaping suction cup 14, thereby allowing for more flexible adjustment of the position and orientation of the shaping suction cup 14, enabling the shaping suction cup 14 to more accurately adhere to the glass and adapt to different processing requirements of glass of different sizes and specifications, making it more flexible and convenient to use.

[0041] In this embodiment, the adjustment device includes a ball seat 121, a universal ball 122, and a slide rod 123. The ball seat 121 is mounted on the base frame 11 and has a ball cavity adapted to the universal ball 122. The universal ball 122 is rotatably mounted in the ball cavity. The universal ball 122 has a sliding hole in the middle that is adapted to the slide rod 123. The slide rod 123 is slidably inserted into the sliding hole. The shaping suction cup 14 is mounted on the slide rod 123. That is, the ball seat 121 and the universal ball 122 form a universal structure, which allows the shaping suction cup 14 to rotate arbitrarily to adjust its orientation. The cooperation between the slide rod 123 and the sliding hole enables the shaping suction cup 14 to move vertically, which can further improve the range of adjustment of the position and orientation of the shaping suction cup 14. The structure is simple and reliable, easy to operate and use, and has a wide range of applications. In other embodiments, the adjustment device may also employ other suitable devices to adjust the orientation and position of the shaping suction cup 14. For example, a universal structure may still be used to adjust the orientation of the shaping suction cup 14, and the movement of the shaping suction cup 14 may be achieved by mounting the ball seat 121 on a displacement structure such as a slide rail. The direction of movement of the shaping suction cup 14 may also be lateral movement or a combination of lateral and longitudinal movement. Alternatively, the orientation of the shaping suction cup 14 may be adjusted by tilting the shaping suction cup 14 onto a turntable and adjusting the orientation of the shaping suction cup 14 by rotating the turntable. Or the orientation of the shaping suction cup 14 may be adjusted by other commonly used structures such as a linkage mechanism. Those skilled in the art can flexibly choose and are not limited to these methods.

[0042] In this embodiment, the ball seat 121 includes two movable sub-seats 1211, which together clamp the universal ball 122. The locking device includes locking screws 13 installed on the sub-seats 1211. The locking screws 13 are used to move the sub-seats 1211 closer to each other or further apart to clamp or loosen the universal ball 122 by changing their tightness. The structure is simple and convenient to disassemble and use. In this embodiment, one of the two sub-seats 1211 is provided with a screw hole adapted to the locking screws 13, and the other is provided with a through hole. There are two locking screws 13. Tightening the locking screws 13 can clamp the universal ball 122 between the two sub-seats 1211 and fix the universal ball 122. Loosening the locking screws 13 can rotate the universal ball 122 to adjust the orientation of the shaping suction cup 14. Further loosening the locking screws 13 can remove the universal ball 122 from the ball seat 121. In some embodiments, a handle can be added to the locking screw 13 for easy manual tightening or loosening. In other embodiments, the locking device can also adopt other commonly used locking structures. For example, the ball seat 121 can be an integral or fixed structure, with screw holes on the side of the ball seat 121. The universal ball 122 can be fixed or loosened by screws screwed into the screw holes and pressed against it. Alternatively, other commonly used locking structures such as pins can be used to fix the adjusting device. Those skilled in the art can flexibly select the appropriate structure based on the structure of the adjusting device. In other embodiments, the ball seat 121 can also have three, four, or any other arbitrary number of sub-seats 1211. Furthermore, the sub-seats 1211 do not have to be completely separated from each other. Since most materials have a certain elastic deformation capability, even if one end of each sub-seat 1211 is connected, the other end can be moved away from or closer to each other by the elastic deformation of the ball seat 121 itself, thereby achieving clamping or loosening of the universal ball 122.

[0043] In this embodiment, the universal ball 122 can expand and contract with the movement of each sub-seat 1211 to clamp or loosen the slide rod 123. Thus, by turning the locking screw 13, the slide rod 123 can be fixed and loosened simultaneously, resulting in a simpler structure that is easier to manufacture and operate. In other embodiments, the locking device can also use other structures to lock the slide rod 123 separately. For example, a screw hole can be opened on the side wall of the universal ball 122, and the slide rod 123 can be locked by pressing the side of the slide rod 123 with a screw. Alternatively, a pin can be used to restrict the sliding of the slide rod 123. A nut can also be installed on the slide rod 123, and the movement of the slide rod 123 can be restricted by the contact between the nut and the universal ball 122. By turning the nut, the fixed position of the slide rod 123 relative to the universal ball 122 can be adjusted. In addition, there are many other commonly used locking structures, which can be flexibly selected by those skilled in the art as needed.

[0044] In this embodiment, the universal ball 122 has expansion and contraction slots 1221 on its side, allowing it to expand and contract. This utilizes the universal ball 122's inherent elastic deformation capability to clamp or release the slide rod 123. The structure is simple and easy to manufacture and assemble. In other embodiments, the universal ball 122 can also have a split structure. It can also be pushed closer or further apart by the ball seat 121 to clamp or release the slide rod 123. In this case, multiple expansion and contraction slots 1221 can be seen penetrating the side of the universal ball 122, dividing it into a split structure.

[0045] In this embodiment, the ball seat 121, the universal ball 122, and the slide rod 123 are all made of stainless steel, which makes the structure sturdy and not easily deformed or loosened. In other embodiments, the ball seat 121, the universal ball 122, and the slide rod 123 may also be made of alloy or other metal materials or engineering plastics or other non-metallic materials as needed.

[0046] A damping structure can also be provided between the universal ball 122 and the ball seat 121. This can limit the universal ball 122 when the locking device is released, preventing it from rotating during subsequent locking operations and facilitating operation. The damping structure can be a frosted surface machined on the inner surface of the universal ball 122 and / or the ball seat 121, or a friction pad such as a rubber sheet can be placed between the universal ball 122 and the ball seat 121 to increase frictional resistance.

[0047] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0048] Reference Figures 3 to 7 A preferred embodiment of the glass processing fixture of this utility model includes a base 20, on which are provided: a positioning device for positioning the glass; a contour support device 40 for supporting the glass; a fixing device for fixing the glass to the base 20; and a shaping device for shaping the glass by adsorbing it with its shaping suction cup 14. The glass processing fixture of this utility model has a positioning device that can accurately position the glass, a fixing device that can fix the glass for installation, and a contour support device 40 that, in conjunction with the shaping device, can effectively shape the glass to a predetermined shape. It can well adapt to the feed distance of the processing device, has a simple structure, low cost, can be flexibly adjusted to adapt to different processing needs, is easy to install and use, and can effectively reduce processing costs and scrap rates while ensuring processing quality.

[0049] As a preferred embodiment of the glass processing fixture in this utility model, it may also have the following additional technical features:

[0050] Reference Figure 3 , Figure 4 , Figure 6 and Figure 7 In this embodiment, the positioning device includes a main positioning device 31 and a secondary positioning device 32 respectively disposed on opposite sides of the glass conveying direction. The main positioning device 31 includes a main positioning member 311 for abutting against the side of the glass and a main driving device 312 for driving the main positioning member 311 to move laterally. The secondary positioning device 32 includes a secondary positioning member 321 for abutting against the side of the glass and a secondary driving device 322 for driving the secondary positioning member 321 to move laterally. The driving force provided by the main driving device 312 to the main positioning member 311 is greater than the driving force provided by the secondary driving device 322 to the secondary positioning member 321. Therefore, the glass can be positioned using the main positioning member 311 of the main positioning device 31 as a reference, avoiding interference from the secondary positioning device 32 with the glass's positioning position, thus helping to ensure the accuracy of glass positioning and guarantee processing quality. In this embodiment, both the main drive device 312 and the auxiliary drive device 322 employ cylinders. The cylinder diameter of the main drive device 312 is larger than that of the auxiliary drive device 322, thereby making the driving force of the main drive device 312 on the main positioning member 311 greater than the driving force of the auxiliary drive device 322 on the auxiliary positioning member 321. In other embodiments, the main drive device 312 and the auxiliary drive device 322 may also employ other commonly used drive structures such as motors, in conjunction with gear and rack transmission mechanisms, worm gear transmission mechanisms, etc., to drive the main positioning member 311 and the auxiliary positioning member 321 to move. The corresponding difference in driving force can be achieved by setting a power difference value. In addition, in this embodiment, a positioning stop 33 is provided on the base 20 corresponding to the main positioning member 311. After the main drive device 312 drives the main positioning member 311 to move towards the glass to a predetermined position, it can abut against the positioning stop 33, thereby accurately positioning the position of the main positioning member 311 and ensuring positioning accuracy and processing quality.

[0051] Reference Figure 3 and Figure 7 In this embodiment, the positioning device further includes a centering clamping device, which includes a centering drive device 34 and a front positioning member 341 and a rear positioning member 342 respectively disposed at the front and rear ends of the glass conveying direction. The centering drive device 34 drives the front positioning member 341 and the rear positioning member 342 to move closer to each other to clamp the glass. Shims can be inserted between the main positioning member 311 and the base 20, between the secondary positioning member 321 and the base 20, between the front positioning member 341 and the base 20, and between the rear positioning member 342 and the base 20 to adjust the height. Thus, the height of the main positioning member 311, the secondary positioning member 321, the front positioning member 341, and the rear positioning member 342 can be adjusted as needed to ensure accurate positioning of the glass and ensure processing quality.

[0052] In this embodiment, the main positioning component 311, the secondary positioning component 321, the front positioning component 341, and the rear positioning component 342 all adopt a roller structure that can be rotatably mounted on the slide block. The slide block is slidably mounted on the base 20 through a slide rail mechanism. The centering drive device 34 adopts a pneumatic gripper. The shim can be selectively placed between the roller and the slide block to adjust the height of the roller. In specific implementation, the roller can be slidably or detachably mounted on the slide block, so that the shim can be inserted and removed.

[0053] In addition, in this embodiment, the main positioning member 311, the secondary positioning member 321, the front positioning member 341, and the rear positioning member 342 are all connected to a vertical drive device 35, so that each positioning member can move up and down with the glass to maintain the positioning of the glass. In this embodiment, the vertical drive device 35 adopts a cylinder. In other embodiments, the vertical drive device 35 can also adopt other commonly used drive structures such as a motor-driven lead screw mechanism.

[0054] Reference Figure 3 , Figure 4 , Figure 6 and Figure 7 In this embodiment, the contouring support devices 40 are distributed around the base 20 at the edge positions of the glass to be processed. Since this embodiment is used for milling the PU edging of glass, the processing area is mainly at the edge of the glass. Therefore, multiple shaping devices are distributed along the contouring support devices 40, so that the shaping devices can cooperate with the contouring support devices 40 to shape and fix the glass at the processing position, ensuring processing quality. In other embodiments, the number and distribution of the shaping devices can be flexibly adjusted as needed. The contouring support devices 40 are widely used in the art. They are usually designed as block structures that fit the outer surface of the glass to be processed and are fixed on the base 20, and will not be described in detail here.

[0055] Reference Figure 3 and Figure 7 In this embodiment, the fixing device includes a lifting seat 51 disposed in the middle of the base 20, a main suction cup 52 disposed on the lifting seat 51, and a lifting drive device for driving the lifting seat 51 to move up and down. The main suction cup 52 can be adsorbed at the center of gravity of the glass. The lifting drive device drives the lifting seat 51 to move down, thereby pressing the outer periphery of the glass onto the contour support device 40 to fix the glass. The lifting drive device can adopt common drive structures such as cylinders and motors.

[0056] Reference Figure 3 , Figure 5 and Figure 7In addition, in this embodiment, a support device 60 is also provided on the base 20. The support device 60 includes a support seat 61 and a ball bearing 62 is provided on the top of the support seat 61. The support seat 61 can support the glass through the ball bearing 62. In this way, after the support device 60 supports the glass, the ball bearing 62 allows the glass to still move laterally so that the positioning device can position the glass. The support seat 61 can move up and down by being driven by the support drive device 63 so as to avoid the support seat 61 from obstructing the downward movement of the glass during the process of the fixing device moving the glass down to fix it. In this embodiment, the support drive device 63 adopts a cylinder. In other embodiments, other commonly used drive structures such as motors can also be used.

[0057] The glass can be transported by an external conveying device, or a lifting conveying device can be added to the base 20 to assist in the feeding and unloading of the glass after processing. Such conveying devices are widely used in the field and will not be described in detail here.

[0058] This glass processing fixture is suitable for the milling process of PU edging for automotive sunroof glass, and can also be used in the processing of car windows, windshields and other types of glass products.

[0059] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0060] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. A shaping device, characterized in that, include: Base frame; A shaping suction cup is mounted on the base frame via an adjustment device, the adjustment device being used to adjust the orientation of the shaping suction cup; An unlockable locking device is provided for locking the adjustment device to secure the shaping suction cup to the base frame; The adjustment device can also adjust the vertical and / or horizontal position of the shaping suction cup; The adjustment device includes a ball seat, a universal ball, and a slide rod. The ball seat is mounted on the base frame and has a ball cavity adapted to the universal ball. The universal ball is rotatably mounted in the ball cavity. The universal ball has a sliding hole in the middle that is adapted to the slide rod. The slide rod is slidably inserted into the sliding hole. The shaping suction cup is mounted on the slide rod.

2. The shaping device according to claim 1, characterized in that, The ball seat includes at least two relatively movable sub-seats, each of which together clamps the universal ball; the locking device includes a locking screw mounted on the sub-seat, the locking screw being used to move the sub-seats closer or further apart to clamp or release the universal ball by changing its tightness.

3. The shaping device according to claim 2, characterized in that, The omnidirectional ball can expand and contract with the movement of each of the respective seats to clamp or release the slide rod.

4. The shaping device according to claim 3, characterized in that, The omnidirectional ball has expansion and contraction slots on its side, allowing it to expand and contract.

5. A shaping device according to claim 3, characterized in that, A damping structure is provided between the omnidirectional ball and the ball seat.

6. A glass processing fixture, characterized in that, Includes a base, on which are provided: A positioning device used to position glass. Contouring support device, used to support glass; A fixing device for securing the glass to the base; and, The shaping device as described in any one of claims 1 to 5 is used to shape glass by adsorbing it with the shaping suction cup.

7. A glass processing fixture according to claim 6, characterized in that, The positioning device includes a main positioning device and a secondary positioning device respectively disposed on opposite sides of the glass conveying direction. The main positioning device includes a main positioning component for abutting against the side of the glass and a main driving device for driving the main positioning component to move laterally. The secondary positioning device includes a secondary positioning component for abutting against the side of the glass and a secondary driving device for driving the secondary positioning component to move laterally. The driving force provided by the main driving device to the main positioning component is greater than the driving force provided by the secondary driving device to the secondary positioning component.

8. A glass processing fixture according to claim 7, characterized in that, The positioning device further includes a centering clamping device, which includes a centering drive device and a front positioning member and a rear positioning member respectively disposed at the front and rear ends of the glass conveying direction. The centering drive device drives the front positioning member and the rear positioning member to move closer to each other to clamp the glass. Pads can be inserted between the main positioning member and the base, between the secondary positioning member and the base, between the front positioning member and the base, and between the rear positioning member and the base to adjust the height.

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