Loading and unloading positioning device of shot blasting machine

Abstract

The utility model discloses a feeding and discharging positioning device of a shot blasting machine. The feeding and discharging positioning device comprises a product placing frame, a lifting driving mechanism, a rotating mechanism, a butt joint mechanism and a positioning mechanism, the output end of the lifting driving mechanism is connected with the rotating mechanism; the bottom of the product placing rack is connected with a rotating device of the shot blasting machine and can rotate along with the rotating device; the lifting driving mechanism drives the rotating mechanism to get close to or away from the docking mechanism; the positioning mechanism comprises a detection piece and an induction piece, the detection piece and the induction piece are arranged on the product containing frame and the lifting driving mechanism respectively, and the detection piece and the induction piece are matched with each other to position the product containing frame. According to the utility model, the product placing rack can be automatically and repeatedly positioned, the positioning precision is high, and the operation requirements of the robot in the loading and unloading chambers of the shot blasting machine are met; the device is small in occupied area, low in cost and suitable for various shot blasting machines; and the requirement of the shot blasting machine for manpower during production is reduced, so that the production efficiency and the product yield are ensured, and the cost-reducing and efficiency-increasing requirements of a user are met.

Description

Technical Field

[0001] This utility model relates to the field of shot blasting machine technology, and in particular to a loading and unloading positioning device for a shot blasting machine. Background Technology

[0002] In the existing technology, the metal processing industry often uses shot blasting machines to process products, which can remove product stress, improve product appearance, and remove sharp edges and burrs generated during processing.

[0003] Shot blasting machines are mostly two- or multi-station machines, which can be divided into shot blasting chamber A and loading / unloading chamber B according to the function of each station. Shot blasting chamber A is the chamber where the product is shot blasted, and it is usually a closed type to prevent steel balls from escaping during shot blasting. Loading / unloading chamber B is the chamber where products are loaded and unloaded, and it is usually an open type. When the product is shot blasted in shot blasting chamber A, in order to ensure the shot blasting effect, the shot blasting machine will drive the product to rotate around its center within shot blasting chamber A. Based on the characteristics of the shot blasting machine's operation, the industry refers to the switching of the rotation between the two chambers as "revolution," and the action of driving the product to rotate around its center as "rotation."

[0004] The shot blasting machine's rotation and revolution are both driven by the machine itself. Rotation occurs only in shot blasting chamber A; it does not occur in loading / unloading chamber B. Due to the harsh, monotonous, and potentially dangerous nature of shot blasting operations, robots are now widely used to replace manual labor for loading and unloading. When using robots to replace manual labor, the shot blasting machine needs to be modified to meet the requirements of automated production.

[0005] Because robots have high repeatability, when using robots to load and unload shot blasting machines, it is necessary to consider improving the repeatability and accuracy of the product fixtures. Therefore, the fixtures need to maintain the same posture when entering and leaving shot blasting chamber A to facilitate robot positioning. Summary of the Invention

[0006] According to an embodiment of the present utility model, a loading and unloading positioning device for a shot blasting machine is provided, comprising: a product placement rack, a lifting drive mechanism, a rotating mechanism, a docking mechanism, and a positioning mechanism;

[0007] The lifting drive mechanism is located above the loading and unloading chamber of the shot blasting machine, and the output end of the lifting drive mechanism is connected to the rotating mechanism.

[0008] The bottom of the product placement rack is connected to the rotating device of the shot blasting machine and can rotate with the rotating device. The product placement rack is used to place products to be shot blasted.

[0009] The docking mechanism is fixed to the top of the product placement rack;

[0010] The lifting drive mechanism drives the rotating mechanism to move closer to or away from the docking mechanism;

[0011] The positioning mechanism includes a detection element and a sensing element, which are respectively installed on the product placement rack and the lifting drive mechanism. The detection element and the sensing element cooperate with each other to position the product placement rack.

[0012] The rotating mechanism and the docking mechanism are interlocked. The rotating mechanism drives the docking mechanism and the product placement rack to rotate, thereby causing the sensing element and the detection element to cooperate with each other.

[0013] Furthermore, the lifting drive mechanism includes: a fixed frame, a lifting cylinder, and a mounting plate;

[0014] The mounting bracket is fixed to the loading and unloading chamber;

[0015] The rotating mechanism and the detection component are mounted on the mounting plate;

[0016] The lifting cylinder is fixed on the fixed frame, and the output end of the lifting cylinder is connected to the mounting plate. The lifting cylinder drives the mounting plate to rise and fall, thereby causing the rotating mechanism to move closer to or away from the docking mechanism.

[0017] Furthermore, the lifting drive mechanism also includes: several guide shafts and several sliding bearings;

[0018] Several sliding bearings are mounted on a fixed frame, and several sliding bearings are fitted one-to-one onto several guide shafts;

[0019] The bottom ends of several guide shafts are fixed to the mounting plate, and these guide shafts are used to guide the movement direction of the mounting plate.

[0020] Furthermore, the rotating mechanism includes: a rotary motor, a rotating block, several guide rods, several locking tongues, and several springs;

[0021] The rotary motor is connected to the output end of the lifting drive mechanism, and the output end of the rotary motor is connected to the rotating block. The rotary motor drives the rotating block to rotate.

[0022] One end of each of the guide rods is fixed to the rotating block;

[0023] Several springs are fitted onto several guide rods in a corresponding manner, and several locking tongues are fitted onto the guide rods in a corresponding manner.

[0024] The two ends of the spring abut against the locking tongue and the rotating block respectively, and the locking tongue is used to engage with the docking mechanism.

[0025] Furthermore, the rotating mechanism also includes: a guide cylinder, which is disposed on the rotating block and sleeved on several locking tongues and several guide rods; a limiting block is also provided between adjacent locking tongues, which is disposed inside the guide cylinder and fixed on the rotating block.

[0026] Furthermore, the docking mechanism includes: a docking block, which is fixed on the top of the product placement rack, and the docking block is provided with several docking slots, which are respectively engaged with several locking tongues.

[0027] Furthermore, the product placement rack includes: a pivot, a fixed base, several rotating rods, several product hangers, and several adjustment components;

[0028] The fixed base is fixed to the bottom of the rotating shaft and is connected to the rotating device. The sensing element and docking mechanism are located at the top of the rotating shaft.

[0029] Several rotating rods are fixed on the rotating shaft and are evenly arranged around the rotating shaft, with each rotating rod corresponding to a product hanger;

[0030] Each product hanger corresponds to a number of adjustment components, and the product hangers are fixed to the rotating rod through the adjustment components.

[0031] The product hanger is used to place the product, and the adjustment component adjusts the position of the product hanger.

[0032] Furthermore, the adjustment assembly includes: a horizontal bar, a vertical bar, a connecting block, a first cover plate, a second cover plate, and several adjusting screws;

[0033] The horizontal bar is fixed to the rotating bar, and the vertical bar is fixed vertically to the product hanger. The horizontal bar, rotating bar, and vertical bar are perpendicular to each other.

[0034] One end of the connecting block is provided with a first slot, and the other end of the connecting block is provided with a second slot;

[0035] The first cover plate is installed on the first slot, and the second cover plate is installed on the second slot. Both the first cover plate and the second cover plate are connected to the connecting block by fasteners.

[0036] The horizontal bar is inserted into the first slot, and the vertical bar is inserted into the second slot;

[0037] Several adjusting screws are respectively installed on the connecting block, the first cover plate and the second cover plate, and the adjusting screws adjust the position of the product hanger.

[0038] Furthermore, the sensing element includes several sensing strips, which are fixed on the rotating shaft, and the positions of the sensing strips correspond one-to-one with the positions of the rotating rods.

[0039] Furthermore, the positioning mechanism also includes: a fixing cylinder and a fixing block;

[0040] The fixed cylinder is fixed on the lifting drive mechanism, and the output end of the fixed cylinder is connected to the fixed block.

[0041] The bottom of the fixing block is provided with a fixing groove, which is adapted to the sensing element;

[0042] The fixed cylinder drives the fixed block to extend, and the fixed groove engages with the sensing element.

[0043] The loading and unloading positioning device for shot blasting machines according to the embodiments of this utility model can realize automatic and repeated positioning of product placement racks with high positioning accuracy, meeting the operation requirements of robots in the loading and unloading chamber of shot blasting machines; the device has a small footprint, low cost, and low operating expenses, and is suitable for various shot blasting machines; it reduces the need for manual labor during shot blasting machine production, thereby ensuring production efficiency and product yield, and meeting the user's needs for cost reduction and efficiency improvement.

[0044] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the positioning state of the loading and unloading positioning device of the shot blasting machine according to an embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of the lifting drive mechanism of the loading and unloading positioning device of the shot blasting machine according to an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the rotating mechanism of the loading and unloading positioning device of the shot blasting machine according to an embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of the product placement rack of the loading and unloading positioning device for a shot blasting machine according to an embodiment of the present invention;

[0049] Figure 5 for Figure 4 Enlarged view of point C in the middle. Detailed Implementation

[0050] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0051] First, combine Figures 1-5 The present invention describes a loading and unloading positioning device for a shot blasting machine according to an embodiment of the present invention, which is used for loading and unloading positioning of shot blasting machine 1 and has a wide range of applications.

[0052] like Figures 1-5 As shown, the loading and unloading positioning device of the shot blasting machine 1 in this embodiment of the present invention includes: a product placement rack 2, a lifting drive mechanism 3, a rotating mechanism 4, a docking mechanism 5, and a positioning mechanism 6.

[0053] Specifically, such as Figures 1-5As shown, in this embodiment, the lifting drive mechanism 3 is located above the loading and unloading chamber B of the shot blasting machine 1. When the shot blasting machine 1 revolves and drives the loading and unloading chamber B to rotate, the lifting drive mechanism 3 will rotate accordingly. The output end of the lifting drive mechanism 3 is connected to the rotating mechanism 4. The lifting drive mechanism 3 drives the rotating mechanism 4 to move up and down to approach or move away from the docking mechanism 5, thereby realizing the docking or detachment of the rotating mechanism 4 and the docking mechanism 5. The bottom of the product placement rack 2 is connected to the rotating device of the shot blasting machine 1 and can rotate with the rotating device to realize the shot blasting of the product. The product placement rack 2 is used to place the product to be shot blasted. The docking mechanism 5 is fixed to the top of the product placement rack 2. The positioning mechanism 6 includes a detection element 61 and a sensing element. The detection element 61 and the sensing element are respectively... The detection element 61 and the sensing element are respectively set on the product placement rack 2 and the lifting drive mechanism 3. The detection element 61 and the sensing element cooperate to position the product placement rack 2. The detection element 61 can be a detection sensor. The rotating mechanism 4 and the docking mechanism 5 are interlocked. The rotating mechanism 4 drives the docking mechanism 5 and the product placement rack 2 to rotate, thereby driving the sensing element and the detection element 61 to cooperate. When the detection element 61 detects the sensing element, it means that the product placement rack 2 has rotated to the designated position. This device can realize the automatic repeat positioning of the product placement rack 2 with high positioning accuracy, which meets the operation requirements of the robot in the loading and unloading chamber B of the shot blasting machine 1. It reduces the need for manual labor during the production of shot blasting machine 1, thereby ensuring production efficiency and product yield, and meeting the user's cost reduction and efficiency improvement needs.

[0054] Specifically, such as Figures 1-5 As shown, in this embodiment, the lifting drive mechanism 3 includes: a fixed frame 31, a lifting cylinder 32, and a mounting plate 33; the fixed frame 31 is fixed on the loading and unloading chamber B for overall support and stability; the mounting plate 33 is equipped with a rotating mechanism 4 and a detection component 61; the lifting cylinder 32 is fixed on the fixed frame 31, and the output end of the lifting cylinder 32 is connected to the mounting plate 33. The lifting cylinder 32 drives the mounting plate 33 to rise and fall, thereby driving the rotating mechanism 4 to move closer to or away from the docking mechanism 5.

[0055] Furthermore, such as Figures 1-5 As shown, in this embodiment, the lifting drive mechanism 3 further includes: a plurality of guide shafts 34 and a plurality of sliding bearings 35; the plurality of sliding bearings 35 are disposed on the fixed frame 31, and the plurality of sliding bearings 35 are correspondingly sleeved on the plurality of guide shafts 34; the bottom ends of the plurality of guide shafts 34 are fixed on the mounting plate 33, and the plurality of guide shafts 34 are used to guide the moving direction of the mounting plate 33 and further improve the stability of the lifting process of the mounting plate 33 and the rotating mechanism 4.

[0056] Specifically, such as Figures 1-5As shown, in this embodiment, the rotating mechanism 4 includes: a rotating motor 41, a rotating block 42, several guide rods 43, several locking tongues 44, and several springs; the rotating motor 41 is connected to the output end of the lifting drive mechanism 3, and the output end of the rotating motor 41 is connected to the rotating block 42, and the rotating motor 41 drives the rotating block 42 to rotate; one end of each of the several guide rods 43 is fixed on the rotating block 42, and the several guide rods 43 are evenly spaced around the rotating block 42; several springs are correspondingly sleeved on the several guide rods 43, and several locking tongues 44 are correspondingly sleeved on the guide rods 43; the two ends of the springs abut against the locking tongues 44 and the rotating block 42 respectively, and the springs drive the locking tongues 44 to extend through their elastic force. The locking tongues 44 are used to engage with the docking mechanism 5. The number of locking tongues 44 is not less than two, and can be two, three, four, etc.

[0057] Furthermore, such as Figures 1-5 As shown, in this embodiment, the rotating mechanism 4 further includes: a guide cylinder 45, which is disposed on the rotating block 42 and sleeved on a plurality of locking tongues 44 and a plurality of guide rods 43. In use, the guide cylinder 45 covers the docking mechanism 5 to guide the docking of the locking tongues 44 and the docking mechanism 5; a limiting block 46 is also provided between adjacent locking tongues 44. The limiting block 46 is disposed inside the guide cylinder 45 and fixed on the rotating block 42. The limiting block 46 further limits the movement direction of the locking tongues 44 to prevent radial movement of the locking tongues 44. In use, the bottom of the limiting block 46 abuts against the docking block to facilitate the engagement of the locking tongues 44 and the docking mechanism 5.

[0058] Furthermore, such as Figures 1-5 As shown, in this embodiment, the docking mechanism 5 includes a docking block 51, which is fixed on the top of the product placement rack 2. The docking block 51 is provided with a plurality of docking grooves 52, which are respectively engaged with a plurality of locking tongues 44. Through this mutually engaged mechanism, when the rotary motor 41 drives the locking tongues 44 to rotate, it can smoothly drive the docking block 51 and the product placement rack 2 to rotate.

[0059] Specifically, such as Figures 1-5As shown, in this embodiment, the product placement rack 2 includes: a rotating shaft 21, a fixed base 22, several rotating rods 23, several product hangers 24, and several adjusting components 25; the fixed base 22 is fixed to the bottom of the rotating shaft 21 and is connected to the rotating device; the sensing element and the docking mechanism 5 are set on the top of the rotating shaft 21; several rotating rods 23 are fixed on the rotating shaft 21 and are evenly arranged around the rotating shaft 21; each of the several rotating rods 23 corresponds to one of the several product hangers 24; the several rotating rods 23 are located on the same plane; the number of rotating rods 23 can be set according to usage requirements, and can be set to 6; in this case, the included angle between adjacent rotating rods 23 is 60°; each of the several product hangers 24 corresponds to one of the several adjusting components 25; the product hangers 24 are fixed to the rotating rods 23 through the adjusting components 25; the product hangers 24 can be existing ones; in this embodiment, the product hangers 24 are made according to the shape of the product and are welded using wear-resistant steel strips; the product is placed inside the product hanger 24, and the adjusting components 25 adjust the position of the product hanger 24. In this embodiment, a protective cover 26 is also fixed to the bottom of the rotating shaft 21. The protective cover 26 is set below the product hanger 24 to prevent debris generated during shot blasting from entering the rotating device of the shot blasting machine 1 and affecting its use.

[0060] Specifically, such as Figures 1-5 As shown, in this embodiment, the adjustment assembly 25 includes: a horizontal bar 251, a vertical bar 252, a connecting block 253, a first cover plate 254, a second cover plate 255, and a plurality of adjusting screws 256; the horizontal bar 251 is fixed on the rotating rod 23, and the vertical bar 252 is vertically fixed on the product hanger 24, with the horizontal bar 251, the rotating rod 23, and the vertical bar 252 being perpendicular to each other; one end of the connecting block 253 is provided with a first slot, and the other end of the connecting block 253 is provided with a second slot; the first cover plate 254 covers... On the first slot, the second cover plate 255 is placed on the second slot. Both the first cover plate 254 and the second cover plate 255 are connected to the connecting block 253 by fasteners. The horizontal bar 251 is inserted into the first slot, and the vertical bar 252 is inserted into the second slot. Several adjusting screws 256 are respectively set on the connecting block 253, the first cover plate 254 and the second cover plate 255. Adjusting the adjusting screws 256 adjusts the position of the product hanger 24. The position of the product hanger 24 can be adjusted to meet the accuracy requirements of use.

[0061] Specifically, the adjusting screws 256 on the first cover plate 254 and connecting block 253 abut against the crossbar 251 and are positioned opposite each other. The adjusting screws 256 on the second cover plate 255 are connected to the connecting block 253. When the product hanger 24 is adjusted vertically, the adjusting screws 256 on the second cover plate 255 are loosened, the vertical bar 252 slides vertically to the designated position, and then the adjusting screws 256 on the second cover plate 255 are tightened. When the product hanger 24 is adjusted in the length direction of the crossbar 251, the adjusting screws 256 on the first cover plate 254 are loosened, the connecting block 253 slides along the crossbar 251 to the designated position, and then the adjusting screws 256 on the first cover plate 254 are tightened. When the product hanger 24 is adjusted in the length direction of the rotating rod 23, the adjusting screws 256 on the first cover plate 254 and connecting block 253 are loosened. The lengths of the adjusting screws on the first cover plate 254 and the connecting block 253 can be adjusted as needed, allowing the crossbar 251 to move within the first slot. Specifically, when the product hanger 24 is to approach the rotating shaft 21, the portion of the adjusting screw 256 on the connecting block 253 located within the first slot will increase, and the portion of the adjusting screw 256 on the first cover plate 254 located within the first slot will shorten. Conversely, when the product hanger 24 is to move away from the rotating shaft 21, the portion of the adjusting screw 256 on the connecting block 253 located within the first slot will shorten, and the portion of the adjusting screw 256 on the first cover plate 254 located within the first slot will increase. In this embodiment, the crossbar 251 is a square bar, and the first slot is a rectangular groove to prevent the connecting block 253 from rotating. Adjacent crossbars 251 are integrally formed, and the crossbar 251 and the rotating rod 23 are integrally formed, improving overall strength.

[0062] Furthermore, such as Figures 1-5 As shown, in this embodiment, the sensing element includes a plurality of sensing strips 62, which are fixed on the rotating shaft 21, and the positions of the plurality of sensing strips 62 correspond one-to-one with the plurality of rotating rods 23.

[0063] Furthermore, such as Figures 1-5 As shown, in this embodiment, the positioning mechanism 6 further includes: a fixing cylinder 63 and a fixing block 64; the fixing cylinder 63 is fixed on the lifting drive mechanism 3, and the output end of the fixing cylinder 63 is connected to the fixing block 64; the bottom of the fixing block 64 is provided with a fixing groove 65, which is adapted to the sensing element; the fixing cylinder 63 drives the fixing block 64 to extend, and the fixing groove 65 is fastened to the sensing element. Since the product placement rack 2 will shake slightly, after the product placement rack 2 is positioned, the fixing cylinder 63 drives the fixing block 64 to extend, so that the fixing block 64 is fastened to the sensing strip 62, thus stabilizing the product placement rack 2.

[0064] Working Principle: The shot blasting machine 1 revolves, causing this device to rotate out of the shot blasting chamber A. During alignment and positioning, the product placement rack 2 is stationary. The lifting cylinder 32 lowers the entire device. When it reaches the lower limit of the lifting cylinder 32, the rotary motor 41 starts to rotate, driving the locking tongue 44 to rotate. When the locking tongue 44 presses down to the upper surface of the docking block 51, the locking tongue 44 retracts under force, compressing the spring. The rotary motor 41 continues to rotate. When the locking tongue 44 aligns with the docking groove 52 of the docking block 51, the spring releases the locking tongue 44, causing it to extend and lock into the docking groove 52, thereby driving the product placement rack 2 to rotate. When the sensing strip 62 rotates below the detection element 61, the detection element 61 sends a signal, and the rotary motor 41 stops rotating. The fixing cylinder 63 descends, stabilizing the product placement rack 2 through the fixing block 64 that engages with the sensing strip 62.

[0065] Above, refer to Figures 1-5 This invention describes a loading and unloading positioning device for a shot blasting machine according to an embodiment of the present invention. This device enables automatic and repeatable positioning of the product placement rack with high positioning accuracy, meeting the operational needs of robots in the loading and unloading chamber of the shot blasting machine. The device has a small footprint, low cost, and low operating expenses, and is suitable for various shot blasting machines. It reduces the need for manual labor during shot blasting production, thereby ensuring production efficiency and product yield, and meeting the user's needs for cost reduction and efficiency improvement.

[0066] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes that element.

[0067] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A loading and unloading positioning device for a shot blasting machine, characterized in that, Includes: product placement rack, lifting drive mechanism, rotating mechanism, docking mechanism, and positioning mechanism; The lifting drive mechanism is located above the loading and unloading chamber of the shot blasting machine, and the output end of the lifting drive mechanism is connected to the rotating mechanism. The bottom of the product placement rack is connected to the rotating device of the shot blasting machine and can rotate with the rotating device. The product placement rack is used to place products to be shot blasted. The docking mechanism is fixed to the top of the product placement rack; The lifting drive mechanism drives the rotating mechanism to move closer to or away from the docking mechanism; The positioning mechanism includes a detection element and a sensing element, which are respectively disposed on the product placement rack and the lifting drive mechanism. The detection element and the sensing element cooperate with each other to position the product placement rack. The rotating mechanism and the docking mechanism are interlocked. The rotating mechanism drives the docking mechanism and the product placement rack to rotate, thereby causing the sensing element and the detection element to cooperate with each other.

2. The loading and unloading positioning device for a shot blasting machine as described in claim 1, characterized in that, The lifting drive mechanism includes: a fixed frame, a lifting cylinder, and a mounting plate; The fixing frame is fixed to the loading and unloading chamber; The rotating mechanism and the detection component are mounted on the mounting plate; The lifting cylinder is fixed on the fixed frame, and the output end of the lifting cylinder is connected to the mounting plate. The lifting cylinder drives the mounting plate to rise and fall, thereby causing the rotating mechanism to move closer to or away from the docking mechanism.

3. The loading and unloading positioning device for a shot blasting machine as described in claim 2, characterized in that, The lifting drive mechanism also includes: several guide shafts and several sliding bearings; The plurality of sliding bearings are mounted on the fixed frame, and the plurality of sliding bearings are respectively sleeved on the plurality of guide shafts; The bottom ends of the plurality of guide shafts are fixed to the mounting plate, and the plurality of guide shafts are used to guide the movement direction of the mounting plate.

4. The loading and unloading positioning device for a shot blasting machine as described in claim 1, characterized in that, The rotating mechanism includes: a rotary motor, a rotating block, several guide rods, several locking tongues, and several springs; The rotary motor is connected to the output end of the lifting drive mechanism, and the output end of the rotary motor is connected to the rotating block. The rotary motor drives the rotating block to rotate. One end of each of the guide rods is fixed to the rotating block; The plurality of springs are respectively fitted onto the plurality of guide rods, and the plurality of locking tongues are respectively fitted onto the guide rods; The two ends of the spring abut against the locking tongue and the rotating block respectively, and the locking tongue is used to engage with the docking mechanism.

5. The loading and unloading positioning device for a shot blasting machine as described in claim 4, characterized in that, The rotating mechanism further includes: a guide cylinder, which is disposed on the rotating block and sleeved on a plurality of locking tongues and a plurality of guide rods; a limiting block is also provided between adjacent locking tongues, which is disposed inside the guide cylinder and fixed on the rotating block.

6. The loading and unloading positioning device for a shot blasting machine as described in claim 4 or 5, characterized in that, The docking mechanism includes a docking block, which is fixed to the top of the product placement rack. The docking block has several docking slots, which are respectively engaged with several locking tongues.

7. The loading and unloading positioning device for a shot blasting machine as described in claim 1, characterized in that, The product placement rack includes: a rotating shaft, a fixed base, several rotating rods, several product hangers, and several adjustment components; The fixing base is fixed to the bottom of the rotating shaft, the fixing base is connected to the rotating device, and the sensing element and the docking mechanism are disposed on the top of the rotating shaft; The plurality of rotating rods are fixed on the rotating shaft and are evenly arranged around the rotating shaft, and the plurality of rotating rods correspond one-to-one with the plurality of product hangers; Each of the plurality of product hangers corresponds one-to-one with the plurality of adjustment components, and the product hangers are fixed on the rotating rod by the adjustment components; The product hanger holds the product, and the adjustment component adjusts the position of the product hanger.

8. The loading and unloading positioning device for a shot blasting machine as described in claim 7, characterized in that, The adjustment assembly includes: a horizontal bar, a vertical bar, a connecting block, a first cover plate, a second cover plate, and several adjusting screws; The horizontal bar is fixed to the rotating rod, and the vertical bar is vertically fixed to the product hanger. The horizontal bar, the rotating rod, and the vertical bar are perpendicular to each other. One end of the connecting block is provided with a first slot, and the other end of the connecting block is provided with a second slot; The first cover plate is placed on the first slot, and the second cover plate is placed on the second slot. Both the first cover plate and the second cover plate are connected to the connecting block by fasteners. The horizontal bar is inserted into the first slot, and the vertical bar is inserted into the second slot; The plurality of adjusting screws are respectively disposed on the connecting block, the first cover plate and the second cover plate, and the adjusting screws adjust the position of the product hanger.

9. The loading and unloading positioning device for a shot blasting machine as described in claim 7, characterized in that, The sensing element includes several sensing strips, which are fixed on the rotating shaft, and the positions of the sensing strips correspond one-to-one with the positions of the rotating rods.

10. The loading and unloading positioning device for a shot blasting machine as described in claim 1 or 9, characterized in that, The positioning mechanism further includes: a fixing cylinder and a fixing block; The fixed cylinder is fixed on the lifting drive mechanism, and the output end of the fixed cylinder is connected to the fixed block; The bottom of the fixing block is provided with a fixing groove, which is adapted to the sensing element; The fixed cylinder drives the fixed block to extend, and the fixed groove engages with the sensing element.

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