Target-changing turnover trolley

Abstract

The utility model relates to the field of solar photovoltaic cell coating auxiliary equipment, and discloses a target-changing turnover trolley which comprises a supporting frame, a rotating device, a target seat placing frame, a guide shaft rod, a fixing assembly, a pressing assembly and a rotating self-locking piece. The rotating devices are arranged on the two sides of the upper end of the supporting frame. And the target seat placing frame is connected with the rotating device. And the guide shaft rod is arranged on the target seat placing frame and is matched with the positioning hole of the target seat. The fixing assembly is arranged on the supporting frame and matched with the target seat placing frame. The pressing assembly is arranged on the periphery of the target base containing frame and used for fixing the target base to the target base containing frame. The rotating self-locking piece is arranged on the supporting frame, and when the pressing assembly is not fixed in place, the rotating device cannot rotate. According to the utility model, the multiple self-locking fool-proof devices are arranged to prevent property loss and personnel safety problems caused by improper operation or negligence of work when the target seat is turned over, so that the operation and the use are convenient, and the safety guarantee is provided.

Description

Technical Field

[0001] The utility model relates to the field of solar photovoltaic cell coating auxiliary equipment, in particular to a target changing and turning trolley. Background Art

[0002] In vacuum magnetron sputtering equipment, the target wears out during the coating process and needs to be replaced periodically. Due to the large size and weight of the target holder, it must be flipped 180 degrees to position and secure it for target tube replacement. The sputtering target holders used in existing PVD equipment or other vacuum equipment are inherently quite heavy, requiring manual labor to move and flip the sputtering target holder whenever the target needs to be replaced. This manual flipping of the target holder has numerous drawbacks, particularly when the sputtering cathode is large and heavy, which can lead to inconvenience and inefficiency in flipping. Furthermore, improper handling during flipping can cause collisions, or the operator can accidentally drop the sputtering cathode due to its excessive weight, damaging the equipment and increasing production costs. Furthermore, improper operation during flipping can result in injuries caused by the sputtering cathode, leading to accidents. To reduce labor intensity and improve efficiency, a flipping trolley is used to assist in flipping the sputtering target holder. The turning trolley uses a press to press the target base onto the rotating table, and then rotates the rotating table to rotate the target base 180 degrees to facilitate target replacement.

[0003] However, the existing tilting trolley is manually rotated, which is inconvenient to operate. In addition, it has no self-locking function and other anti-fouling functions, which may cause equipment collision, falling damage, and personal injury due to improper operation or negligence of employees. Utility Model Content

[0004] The purpose of the utility model is to solve the safety hazards of equipment collision, falling damage and personal injury when turning over the target base in the prior art, and to provide a target changing and turning trolley. By arranging multiple self-locking anti-foolproof devices, the utility model can prevent property loss and personal safety problems caused by improper operation or negligence of employees when turning over the target base. The utility model is not only easy to operate and use, but also more secure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a target changing and flipping trolley, which includes: a support frame, a rotating device, a target base placement frame, a guide shaft, a fixing assembly, a clamping assembly, and a rotating self-locking member. The rotating device is arranged on both sides of the upper end of the support frame. The target base placement frame is connected to the rotating device. The guide shaft is arranged on the target base placement frame and cooperates with the positioning hole of the target base. The fixing assembly is arranged on the support frame and cooperates with the target base placement frame to fix the target base placement frame on the bracket frame. The clamping assembly is arranged on all sides of the target base placement frame to fix the target base on the target base placement frame and support the target base during flipping. The rotating self-locking member is arranged on the support frame. When the clamping assembly is not fixed in place, the rotating device cannot rotate.

[0007] Furthermore, the rotating device includes a left connecting shaft, a right connecting shaft and a bearing seat. The left connecting shaft and the right connecting shaft are fixedly mounted on the support frame through the bearing seat and are respectively connected to the two ends of the target base placement frame.

[0008] Furthermore, the clamping assembly includes a clamping block assembly arranged on both sides of the target base placement frame in the transverse direction and a torsion spring auxiliary clamping assembly arranged on both sides of the target base placement frame in the longitudinal direction.

[0009] The pressure block assembly includes a guide support seat, a top block and an indexing pin; the guide support seat is fixedly installed on both sides of the target seat placement frame, and the top block can movably pass through the middle of the guide support seat to support the target seat step; the guide support seat is provided with a first fixing hole; the top block is provided with a second fixing hole and a third fixing hole, when the top block is pushed forward to support the target seat step, the first fixing hole is communicated with the second fixing hole, when the top block is pulled out backward to separate from the target seat step, the first fixing hole is communicated with the third fixing hole; the indexing pin passes through the first fixing hole and the second fixing hole at the same time, or passes through the first fixing hole and the third fixing hole at the same time.

[0010] The torsion spring-assisted clamping assembly includes a mounting block, a clamping block, and a fixing bolt. The mounting block is fixedly mounted on both longitudinal sides of the target base frame, and the clamping block is reversibly mounted on the mounting block via a torsion spring. The clamping block is provided with a through hole, and the mounting block is provided with a threaded hole. The fixing bolt passes through the through hole to lock the clamping block to the mounting block.

[0011] Furthermore, a first locking bolt for locking the top block to the guide support seat is provided above the guide support seat, and a second locking bolt for ensuring that the pressure block assembly is tightly attached to the upper end surface of the target seat step is provided above one end of the top block close to the target seat step.

[0012] Furthermore, the rotating self-locking part is a support block, which is fixed on the support frame, and the upper end surface of the support block is a plane; the bottom surface of the end of the top block away from the target seat is a plane; when the top block is pulled backward to separate from the target seat step, the bottom surface of the rear end of the top block fits with the upper end surface of the support block, and when the top block is pushed forward to support the target seat step, the rear end of the top block is separated from the support block.

[0013] Furthermore, the rotating device also includes a worm gear reduction motor, a reducer mounting bracket and a coupling; the worm gear reduction motor is fixedly mounted on the support frame through the reducer mounting bracket, and the rotating shaft of the worm gear reduction motor is connected to the left connecting shaft or the right connecting shaft through the coupling, and the target changing and flipping trolley also includes a control system, which is electrically connected to the worm gear reduction motor and is used to control the operation of the worm gear reduction motor.

[0014] Furthermore, the rotating self-locking member is a through-beam photoelectric sensor, which is mounted on the support frame and located on either side of the top block. The through-beam photoelectric sensor is electrically connected to the control system. When the top block is pushed forward to press against the target base step, the rear end of the top block is outside the through-beam photoelectric sensor's light beam, placing the worm gear reduction motor circuit in a conductive state. When the top block is pulled backward to disengage the target base step, the rear end of the top block is located in the middle of the through-beam photoelectric sensor, blocking the through-beam light beam, placing the worm gear reduction motor circuit in a disconnected state.

[0015] Furthermore, the fixing assembly includes a support and a pin; the support is fixed on the support frame, a through hole is provided on the support, a fixing hole is provided on the target base placement frame, and the pin passes through the through hole on the support and is inserted into the fixing hole of the target base placement frame to fix the target base placement frame on the support frame.

[0016] Furthermore, the fixing assembly also includes a compression spring and a spring pin; the compression spring is sleeved on the pin shaft and is located inside the support; a partition is provided in the middle of the support, and a notch is provided on the partition for the spring pin to pass through; the spring pin is provided on the pin shaft, and when the pin shaft is inserted into the fixing hole of the target base placement frame, the pin shaft is abutted against the inner wall of the support; when the pin shaft is separated from the fixing hole of the target base placement frame, the pin shaft is abutted against the partition of the support.

[0017] Furthermore, universal wheels are provided at the bottom of the support frame.

[0018] The benefits of this utility model are:

[0019] The target base placement frame of the present invention realizes semi-automatic flipping operation through a rotating device, which is simple, convenient and labor-saving to operate. The target base is more reliably fixed to the target base placement frame by a clamping assembly, preventing the target base from detaching from the target base placement frame when flipping. The provision of a guide shaft makes it easier to place the target base on the target base placement frame, while also playing a role in positioning and fixing. The provision of a rotating self-locking part plays an anti-fool self-locking role. When the clamping assembly is not in a fixed position, the target base placement frame cannot be flipped, preventing the target base from slipping and being damaged due to human operating errors. It is not only easy to operate and use, but also more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural diagram of this embodiment.

[0022] Figure 2 This is a structural diagram of one side of this example.

[0023] Figure 3 It is a structural diagram of the other side of this embodiment.

[0024] Figure 4 It is a structural diagram of the briquetting assembly.

[0025] Figure 5 It is a schematic diagram of the cross-sectional structure of the briquetting assembly.

[0026] Figure 6 It is a structural diagram of the torsion spring auxiliary clamping assembly.

[0027] Figure 7 It is a structural diagram of the fixed component.

[0028] Figure 8 is a cross-sectional view of the fixed component.

[0029] Figure 9 This is a usage status diagram of this embodiment.

[0030] Figure 10 yes Figure 9 A partial enlarged view of point A in the middle.

[0031] Description of main component symbols:

[0032] 111. Support frame; 112. Reducer mounting bracket; 113. Worm gear reducer motor; 114. Coupling; 115. Bearing seat;

[0033] 121. Target base placement frame; 122. Left connecting shaft; 123. Right connecting shaft; 124. Guide shaft;

[0034] 131. Press block assembly; 1311. Top block; 1312. Guide support seat; 1313. Indexing pin; 1314. First locking bolt; 1315. Second locking bolt; 1316. First fixing hole; 1317. Second fixing hole; 1318. Third fixing hole;

[0035] 132. Torsion spring auxiliary clamping assembly; 1321. Mounting block; 1323. Clamping block; 1324. Torsion spring; 1325. Fixing bolt;

[0036] 133, support block;

[0037] 134. Fixing assembly; 1341. Pin; 1342. Compression spring; 1343. Support; 1344. Spring pin; 1345. Partition; 1346. Notch; 135. Through-beam photoelectric sensor; 141. Control system; 142. Target base. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] In the present invention, unless otherwise stated, directional words such as "up, down, left, right" are generally understood in conjunction with the directions shown in the drawings and actual applications.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0041] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0042] The endpoints of the ranges and any values ​​disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values ​​can be combined to form one or more new numerical ranges, and these numerical ranges should be considered to be specifically disclosed herein. The terms "optional" and "optional" mean that a range may or may not be included (or may or may not be present).

[0043] like Figures 1 to 10 As shown, the utility model discloses a target changing and turning trolley, which includes: a support frame 111, a rotating device, a target base placement frame 121, a guide shaft 124, a fixing assembly 134, a pressing assembly, a rotating self-locking member and a control system 141.

[0044] The rotating devices are arranged on both sides of the upper end of the supporting frame 111 .

[0045] The target base placement frame 121 is connected to a rotating device, and the rotating device is used to achieve 180-degree flipping relative to the support frame 111.

[0046] The guide shaft 124 is provided on the target base placement frame 121 and cooperates with the positioning hole of the target base 142. This makes it easier for the target base 142 to be placed on the target base placement frame 121 and plays a role in positioning and fixing.

[0047] The fixing assembly 134 is disposed on the supporting frame 111 and cooperates with the target base placement frame 121 to fix the target base placement frame 121 on the bracket frame.

[0048] The clamping assembly is arranged around the target base placement frame 121 and is used to fix the target base 142 on the target base placement frame 121 and support the target base 142 when it is turned over.

[0049] The rotating self-locking member is provided on the supporting frame 111 , and when the pressing assembly is not fixed in place, the rotating device cannot rotate.

[0050] Specifically, if Figure 2 、 Figure 3 As shown, the rotating device includes a left connecting shaft 122, a right connecting shaft 123, a bearing seat 115, a worm gear reduction motor 113, a reducer mounting bracket 112, and a coupling 114. The left connecting shaft 122 and the right connecting shaft 123 are fixedly mounted on the support frame 111 via the bearing seat 115 and are respectively connected to the ends of the target base placement frame 121. The worm gear reduction motor 113 is fixedly mounted on the support frame 111 via the reducer mounting bracket 112, and the rotating shaft of the worm gear reduction motor 113 is connected to the left connecting shaft 122 or the right connecting shaft 123 via the coupling 114. A control system 141 is electrically connected to the worm gear reduction motor 113 for controlling the operation of the worm gear reduction motor 113.

[0051] Specifically, if Figure 9 、 Figure 10 As shown, the pressing assembly includes a pressing block assembly 131 arranged on both sides of the target base placement frame 121 in the horizontal direction and a torsion spring auxiliary pressing assembly 132 arranged on both sides of the target base placement frame 121 in the longitudinal direction.

[0052] Among them, such as Figure 4 、 Figure 5 As shown, the pressure block assembly 131 includes a guide support 1312, a push block 1311, and an indexing pin 1313. The guide support 1312 is fixedly mounted on both lateral sides of the target support frame 121. The push block 1311 can movably pass through the middle of the guide support 1312 to support the step of the target support 142. A first fixing hole 1316 is provided on the guide support 1212, while a second fixing hole 1317 and a third fixing hole 1318 are provided on the push block 1311. When the push block 1311 is pushed forward to support the step of the target support 142, the first fixing hole 1316 and the second fixing hole 1317 communicate with each other. When the push block 1311 is pulled back to disengage the step of the target support 142, the first fixing hole 1316 and the third fixing hole 1318 communicate with each other. The indexing pin 1313 passes through both the first fixing hole 1316 and the second fixing hole 1317, or both the first fixing hole 1316 and the third fixing hole 1318. The two position states of the top block 1311 are positioned by the indexing pin 1313 .

[0053] For better fixation, a first locking bolt 1314 is provided above the guide support seat 1312 for locking the top block 1311 to the guide support seat 1312, and a second locking bolt 1315 is provided above one end of the top block 1311 close to the step of the target seat 142 for ensuring that the pressure block assembly 131 is tightly attached to the upper end surface of the step of the target seat 142, filling the gap between the bottom surface of the top block 1311 and the step of the target seat 142.

[0054] Among them, such as Figure 6As shown, the torsion spring-assisted clamping assembly 132 includes a mounting block 1321, a clamping block 1323, and fixing bolts 1325. The mounting blocks 1321 are fixedly mounted on both longitudinal sides of the target support frame 121. The clamping blocks 1323 are reversibly mounted on the mounting blocks 1321 via torsion springs 1324. The clamping blocks 1323 are provided with through-holes, while the mounting blocks 1321 are provided with threaded holes. Fixing bolts 1325 pass through the through-holes to secure the clamping blocks 1323 to the mounting blocks 1321.

[0055] Specifically, the rotation self-locking member includes a support block 133 for mechanical self-locking and a through-beam photoelectric sensor 135 for electrical self-locking.

[0056] Among them, such as Figure 10 As shown, support block 133 is fixed to support frame 111, and the upper end surface of support block 133 is a plane. The bottom surface of the end of top block 1311 away from target base 142 is a plane. When top block 1311 is pulled backward to disengage the step of target base 142, the bottom surface of the rear end of top block 1311 abuts the upper end surface of support block 133, so that top block 1311 is restricted from rotation by support block 133, thereby restricting the rotation of target base placement frame 121. When top block 1311 is pushed forward to support the step of target base 142, the rear end of top block 1311 disengages support block 133, and top block 1311 is freed from the restriction of support block 133 and can be driven to rotate by worm gear reduction motor 113. The provision of support block 133 prevents the operator from forgetting to tighten top block 1311 and flipping target base 142, causing the target base 142 to slip and be damaged. This not only makes operation and use convenient, but also provides greater safety.

[0057] The through-beam photoelectric sensor 135 is disposed on the support frame 111 and is located on both sides of the top block 1311. The through-beam photoelectric sensor 135 is electrically connected to the control system 141. When the top block 1311 is pulled backward to disengage from the step of the target base 142, the rear end of the top block 1311 is located in the middle of the through-beam photoelectric sensor 135, blocking the through-beam light. The worm gear motor circuit is in an open circuit state, and even if the start rotation button is pressed, the motor will not rotate. When the top block 1311 is pushed forward to support the step of the target base 142, the rear end of the top block 1311 is located outside the light of the through-beam photoelectric sensor 135, and the worm gear motor circuit is in an open circuit state, releasing the restriction of the through-beam photoelectric sensor 135 on the motor. The provision of the through-beam photoelectric sensor 135 further prevents the operator from forgetting to tighten the top block 1311 and flipping the target base 142, causing the target base 142 to slip and be damaged.

[0058] The dual protection of electrical self-locking and mechanical self-locking can avoid the hidden danger of losing the self-locking function due to failure of one of them.

[0059] Specifically, if Figure 7 Figure 8As shown, the fixing assembly 134 includes a support 1343 and a pin 1341. The support 1343 is fixed to the support frame 111. A through-hole is provided in the support 1343, and a fixing hole is provided in the target base placement frame 121. The pin 1341 passes through the through-hole in the support 1343 and is inserted into the fixing hole in the target base placement frame 121, thereby securing the target base placement frame 121 to the support frame 111. When loading and unloading the target base 142 or replacing targets, the fixing assembly 134 secures the target base placement frame 121, facilitating operation and providing increased or decreased safety.

[0060] For enhanced ease of use, the fixing assembly 134 also includes a compression spring 1342 and a spring pin 1344. Compression spring 1342 is mounted on a pin 1341 and positioned within a support 1343. A partition 1345 is positioned in the center of the support 1343, with a notch 1346 formed in the partition 1345 for the spring pin 1344 to pass through. The spring pin 1344 is mounted on the pin 1341. When the pin 1341 is inserted into the fixing hole of the target support frame 121, it abuts against the inner wall of the support. When the pin 1341 is removed from the fixing hole of the target support frame 121, the pin 1341 abuts against the support's partition 1345. During use, when it is necessary to release the fixation, the pin 1341 is pulled backward, and the spring pin 1344 passes through the notch 1346 on the partition 1345 and disengages from the fixing hole of the target base placement frame 121. The pin is rotated so that the spring pin 1344 does not correspond to the notch 1346. After the pin 1341 is released, the pin 1341 is abutted against the partition 1345 of the support; when it is necessary to fix, the pin 1341 is rotated so that the spring pin 1344 passes through the notch 1346 correspondingly and abuts against the inner wall of the support. The end of the pin 1341 is inserted into the fixing hole of the target base placement frame 121 to fix it.

[0061] In order to facilitate movement, universal wheels are also provided at the bottom of the support frame 111.

[0062] Operation process:

[0063] Fixing the target base placement frame 121 : Before use, insert the pin 1341 of the fixing assembly 134 into the fixing hole of the target base placement frame 121 to fix the target base placement frame 121 to the support frame 111 .

[0064] Position and tighten the target base 142: Place the target base 142 on the target base placement frame 121 along the guide shaft 124. Press the top block 1311 of the pressure block assembly 131 against the step of the target base 142, and insert the indexing pin 1313 into the first fixing hole 1316 and the second fixing hole 1317 to secure it. Simultaneously, press the pressure block 1323 of the torsion spring-assisted pressure assembly 132 against the step of the target base 142, and tighten the pressure block 1323 to the mounting block 1321 with the fixing bolt 1325.

[0065] Release the fixation and rotate the target base 142: pull out the pin 1341 of the fixing assembly 134 to release the fixation between the target base placement frame 121 and the support frame 111, then start the worm gear reduction motor 113, and the target base 142 rotates 180 degrees following the target base placement frame 121, with the bottom of the target base facing upward.

[0066] Fix the target base 142 and change the target: insert the pin 1341 of the fixing assembly 134 into the fixing hole of the target base placement frame 121, fix the target base placement frame 121 and the support frame 111, and then change the target.

[0067] Release the fixation and rotate the target base 142: After the target is changed, pull out the pin 1341 of the fixing assembly 134 to release the fixation between the target base placement frame 121 and the support frame 111. Then start the worm gear reduction motor 113, and the target base 142 rotates 180 degrees following the target base placement frame 121, and the bottom of the target base returns to the downward position.

[0068] Fix the target base placement frame 121 : insert the pin 1341 of the fixing assembly 134 into the fixing hole of the target base placement frame 121 to fix the target base placement frame 121 to the support frame 111 .

[0069] To loosen and remove target backing 142, unscrew the fixing bolts 1325 of the torsion spring-assisted clamping assembly 132 to open the clamping block 1323. Simultaneously, pull the top block 1311 of the clamping block assembly 131 rearward to clear the step on target backing 142, and insert the indexing pin 1313 into the first and third fixing holes 1316, 1318 to secure the target backing. Finally, move target backing 142 to the desired position.

[0070] Complete the operation.

[0071] In summary, the utility model prevents property losses and personnel safety issues caused by employees flipping the target seat due to improper operation or negligence at work by providing multiple self-locking anti-fool devices. It is not only easy to operate and use, but also more secure.

[0072] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made, including combining the various technical features in any other appropriate manner. These simple variations and combinations should also be considered as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A target changing turning trolley, characterized in that: include: Support frame; The rotating device is arranged on both sides of the upper end of the supporting frame; The target base is placed on the frame and connected to the rotating device; A guide shaft is provided on the target base placement frame and matches with the positioning hole of the target base; A fixing assembly is provided on the support frame and cooperates with the target base placement frame to fix the target base placement frame on the support frame; The clamping assembly is arranged around the target base placement frame, and is used to fix the target base on the target base placement frame and support the target base when it is turned over; The rotating self-locking part is arranged on the supporting frame. When the pressing assembly is not fixed in place, the rotating device cannot rotate.

2. The target changing and turning trolley according to claim 1, characterized in that: The rotating device includes a left connecting shaft, a right connecting shaft and a bearing seat; the left connecting shaft and the right connecting shaft are fixedly installed on the support frame through the bearing seat and are respectively connected to the two ends of the target base placement frame.

3. The target changing and turning trolley according to claim 2, characterized in that: The clamping assembly includes a clamping block assembly arranged on both sides of the target base placement frame in the transverse direction and a torsion spring auxiliary clamping assembly arranged on both sides of the target base placement frame in the longitudinal direction; The pressure block assembly includes a guide support seat, a top block and an indexing pin; the guide support seat is fixedly mounted on both lateral sides of the target base placement frame, and the top block can movably pass through the middle of the guide support seat to support the target base step; the guide support seat is provided with a first fixing hole; the top block is provided with a second fixing hole and a third fixing hole, and when the top block is pushed forward to support the target base step, the first fixing hole is communicated with the second fixing hole, and when the top block is pulled backward to separate from the target base step, the first fixing hole is communicated with the third fixing hole; the indexing pin passes through the first fixing hole and the second fixing hole at the same time, or passes through the first fixing hole and the third fixing hole at the same time; The torsion spring assisted clamping assembly includes a mounting block, a clamping block, and a fixing bolt. The mounting block is fixedly mounted on both longitudinal sides of the target base placement frame, and the clamping block is flippably arranged on the mounting block through a torsion spring; a through hole is provided on the clamping block, and a threaded hole is provided on the mounting block. The fixing bolt passes through the through hole to lock the clamping block to the mounting block.

4. The target changing and turning trolley according to claim 3, characterized in that: A first locking bolt for locking the top block to the guide support seat is provided above the guide support seat, and a second locking bolt for ensuring that the pressure block assembly is tightly attached to the upper end surface of the target seat step is provided above one end of the top block close to the target seat step.

5. The target changing and turning trolley according to claim 3, characterized in that: The rotating self-locking part is a support block, which is fixed to the support frame, and the upper end surface of the support block is a plane; the bottom surface of the end of the top block away from the target seat is a plane; when the top block is pulled backward to separate from the target seat step, the bottom surface of the rear end of the top block fits with the upper end surface of the support block, and when the top block is pushed forward to support the target seat step, the rear end of the top block is separated from the support block.

6. The target changing and turning trolley according to claim 3, characterized in that: The rotating device also includes a worm gear reduction motor, a reducer mounting bracket and a coupling; the worm gear reduction motor is fixedly mounted on the support frame through the reducer mounting bracket, and the rotating shaft of the worm gear reduction motor is connected to the left connecting shaft or the right connecting shaft through the coupling. The target changing and flipping trolley also includes a control system, which is electrically connected to the worm gear reduction motor and is used to control the operation of the worm gear reduction motor.

7. The target changing and turning trolley according to claim 6, characterized in that: The rotating self-locking part is a through-beam photoelectric sensor; the through-beam photoelectric sensor is arranged on the support frame and is located on both sides of the top block; the through-beam photoelectric sensor is electrically connected to the control system. When the top block is pushed forward to support the target seat step, the rear end of the top block is outside the light of the through-beam photoelectric sensor, and the worm gear reduction motor circuit is in a connected state; when the top block is pulled backward to separate from the target seat step, the rear end of the top block is located in the middle of the through-beam photoelectric sensor, blocking the through-beam light, and the worm gear reduction motor circuit is in a disconnected state.

8. The target changing and turning trolley according to claim 1, characterized in that: The fixing assembly includes a support and a pin; the support is fixed on the support frame, a through hole is provided on the support, and a fixing hole is provided on the target base placement frame. The pin passes through the through hole on the support and is inserted into the fixing hole of the target base placement frame to fix the target base placement frame on the support frame.

9. The target changing and turning trolley according to claim 8, characterized in that: The fixing assembly also includes a compression spring and a spring pin; the compression spring is sleeved on the pin shaft and is located inside the support; a partition is provided in the middle of the support, and a notch is provided on the partition for the spring pin to pass through; the spring pin is provided on the pin shaft, and when the pin shaft is inserted into the fixing hole of the target base placement frame, the pin shaft abuts against the inner wall of the support; when the pin shaft is separated from the fixing hole of the target base placement frame, the pin shaft abuts against the partition of the support.

10. The target changing and turning trolley according to claim 1, characterized in that: The bottom of the support frame is also provided with universal wheels.

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