A dual-channel turbocharger flow channel sand core fixing device

Abstract

The present invention discloses a device for fixing a sand core of a dual-channel turbocharger flow channel, comprising a supporting body, an extrusion mechanism, a receiving mechanism and a locking piece; the extrusion mechanism and the receiving mechanism cooperate to fix the two flow channel sand states that are initially bonded, and the arrangement of the notches can generate a space to avoid the two flow channel sand cores, thereby avoiding the size of the sand core after core assembly being out of tolerance due to the interference of the clamps, and reducing the scrap rate; a plurality of baffles that can slide along the radial direction are mounted on the receiving plate, and can automatically unfold and wrap based on the size of the structure of the sand core core head against the receiving plate, and cooperate with the locking piece to lock the position of the baffle in the clamping state to avoid the side slip of the sand core core head, thereby improving the stability of the clamping; wherein the arrangement of the plurality of limit strips can staggeredly retract into or extend out of the blind hole under the action of the extrusion force, thereby forming a spatial structure wrapped in the structure of the sand core core head against the receiving plate, thereby further improving the stability and avoiding errors caused by side slip.

Description

Technical Field

[0001] The invention relates to the technical field of sand core casting, in particular to a dual-flow-channel turbocharger flow channel sand core fixing device. Background Art

[0002] Because the structure of the partition position of the dual-channel turbocharger is complex and not easy to separate, the current method is to separate the two channels into cores, and then use adhesives to combine the two channels into a whole. The commonly used adhesives are relatively viscous and have a certain tension when they are not solidified; therefore, the two sand cores after bonding cannot fit together well under natural gravity; when the adhesive is solidified, the gap between the two cores will exceed the design gap, resulting in a large deviation in the product flow channel size, and in severe cases, the casting may be scrapped; therefore. In the casting process of the dual-channel turbocharger, it is necessary to use adhesives to assemble the two flow channel cores together, and use clips to fix them when assembling the cores. During the clamping, it is inevitable that the clip arm will press on the sand core, resulting in a change in the position of one of the flow channels. The flow channel size deviation is large, which affects the product processing, and in severe cases, it may lead to the loss of product function and the scrapping of the product. Therefore, a dual-channel turbocharger flow channel sand core fixing device is urgently needed to solve the above problems. Summary of the invention

[0003] The present invention aims to provide a dual-channel turbocharger flow channel sand core fixing device, which can effectively solve the problem.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a dual-channel turbocharger flow channel sand core fixing device, used to fix two bonded flow channel sand cores until the bonding state of the two flow channel sand cores is stable, the fixing device comprises:

[0005] A support body, wherein the support body defines a first end and a second end, wherein the first end and the second end are coaxially arranged; and

[0006] The support body is provided with a notch between the first end and the second end for avoiding two flow channel sand cores;

[0007] The extrusion mechanism comprises a travel rod moving along the axis direction of the first end, the travel rod being located at one end of the second end and having an extrusion head mounted thereon, the travel rod being configured to drive the extrusion head to move toward the second end or away from the second end;

[0008] A receiving mechanism, comprising a receiving plate installed on the second end and facing the first end, wherein a plurality of baffles are provided at the edge of the receiving plate, each of the baffles is radially slidably arranged along the receiving plate, and the baffles are slidably adjusted to adjust the distance between the baffles and the receiving plate; and

[0009] A locking member is arranged inside the baffle, and the locking member is configured to lock the position of each baffle at least when the receiving plate is subjected to force.

[0010] Preferably, the minimum distance between the inner surface of the notch and the two assembled flow channel sand cores is not less than two centimeters.

[0011] Preferably, a screw hole is provided at the first end portion along the axial direction, the traveling rod is a screw mechanism, the traveling rod is engaged with the screw hole, and the traveling rod is rotated to adjust the feed amount of the extrusion head.

[0012] Preferably, a rotating handle is provided at one end of the traveling rod away from the extrusion head, and the traveling rod is rotated by operating the handle; or, a connecting head is provided at one end of the traveling rod away from the extrusion head, and the connecting head is used to be spliced ​​with the output end of the power mechanism, and the traveling rod is driven to rotate by the power mechanism.

[0013] Preferably, one side of each baffle plate facing the center of the receiving plate is defined as a contact surface, a plurality of blind holes are arranged on the contact surface, and a limit bar is installed in each blind hole, and the limit bar is configured to be driven by elastic force to extend out of the blind hole or to be compressed into the blind hole by external force; and

[0014] The top area of ​​each of the limiting strips extending out of the blind hole is chamfered.

[0015] Preferably, the receiving plate is provided with a plurality of radially arranged channels, each of the channels is provided with a sliding plate, and each of the baffles is provided at one end of a corresponding sliding plate extending out of the channel;

[0016] The locking member comprises:

[0017] A first rack, each of the sliding plates is provided with a first rack near the center of the receiving plate;

[0018] A movable plate, installed inside the receiving plate and located below the sliding plate, and moving in a vertical direction when subjected to force; and

[0019] A second rack, wherein each of the movable plates is provided with a second rack at a position corresponding to each of the first racks, and the second rack is engaged with or separated from the first rack as the movable plate moves; and

[0020] When the second rack is meshed with the first rack, the sliding plate is in a locked state;

[0021] When the second rack is separated from the first rack, the sliding plate is in an unlocked state.

[0022] Preferably, a pressure plate is installed at the top of the receiving plate, and the top surface of the pressure plate is defined as a pressure surface, and the pressure surface is configured to generate a certain displacement in the vertical direction;

[0023] Wherein, a linkage member is installed in the receiving plate, the linkage member is arranged between the pressure surface and the movable plate, and the linkage member is used to drive the movable plate to move synchronously in the vertical direction when the pressure surface is displaced.

[0024] Preferably, the linkage comprises:

[0025] A linkage rod, one end of which is connected to the pressure surface, and the other end of which extends below the movable plate;

[0026] An extrusion cone head is installed at the extended end of the linkage rod;

[0027] A slope is provided on which a pressure block is slidably mounted. The pressure block is configured to move downward along with the extrusion cone head. The extrusion cone head contacts the pressure block. The pressure block moves along the slope to generate an upward displacement and simultaneously squeezes the movable plate to move upward.

[0028] Preferably, the support body is provided with an arc-shaped groove near the second end, and a support foot of a corresponding shape is hinged in the arc-shaped groove, and the support foot is used to support the support body when it rotates out of the arc-shaped groove.

[0029] Preferably, a slide groove is provided on the support body in the vertical direction, a splicing frame is slidably installed in the slide groove, and the splicing frame is used to connect the splicing arrangement between two support bodies; one end of the splicing frame is a sliding end, which is slidably installed in the slide groove; the other end of the splicing frame is a splicing end, and a splicing joint is installed on the splicing end;

[0030] Among them, a push rod is installed in the splicing frame, one end of the push rod extends into the slide groove, and a friction plate is installed on the extended end of the push rod, the splicing joint is rotatably installed at the splicing end, and at least one protrusion is provided on the splicing joint, and the protrusion is used to squeeze the other end of the push rod when the splicing joint is rotated to a specific position, pushing the push rod to produce displacement, so that the friction plate at the other end of the push rod is close to the inner wall of the slide groove.

[0031] In the above technical solution:

[0032] In the present invention, the states of the two initially bonded flow channel sands can be fixed by the cooperation of the extrusion mechanism and the receiving mechanism, and the setting of the notch can create a space to avoid the two flow channel sand cores, thereby avoiding the size deviation of the sand core after core assembly due to the interference of the clamps. The sand core size has good consistency, which can reduce the scrap rate and stabilize the product quality.

[0033] In the present invention, a plurality of baffles which can slide radially are installed on the receiving plate, which can automatically unfold and wrap based on the size of the structure of the sand core head against the receiving plate, and cooperate with the locking member to lock the position of the baffle in the clamping state to prevent the sand core head from sliding sideways, thereby improving the stability of the clamping. Specifically, a plurality of limit strips are arranged, which can be staggeredly retracted into or extended out of the blind hole under the action of the extrusion force, forming a spatial structure wrapped around the structure of the sand core head against the receiving plate, thereby further improving the stability and avoiding errors caused by sliding sideways.

[0034] In addition, through the action of the first rack, the movable plate, the second rack and the linkage, the pressure generated by the clamping sand core head can be converted into a force applied to the movable plate, thereby causing the first rack and the second rack to engage and automatically lock the position of the push plate. When no force is generated, the first rack and the second rack can be automatically separated and unlocked by gravity, which is simple and convenient to operate.

[0035] In the present invention, a splicing frame is installed on each supporting body, and two adjacent supporting bodies can be spliced ​​together through the splicing frame. By repeating this operation, multiple supporting bodies can be spliced ​​together to form a whole fixed chain. The supporting bodies connected in the fixed chain can be placed vertically, and there is a distance between the two to avoid contact and collision between objects on adjacent supporting bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0037] In the attached picture:

[0038] Figure 1 It is a schematic diagram of the structure of the existing dual-flow channel turbocharger flow channel core fixing device;

[0039] Figure 2 It is a schematic diagram of the structure of the fixing device of the present invention;

[0040] Figure 3 It is a detailed structural schematic diagram of the fixing device of the present invention;

[0041] Figure 4 It is a schematic diagram of the structure of different driving modes of the traveling rod of the fixing device of the present invention;

[0042] Figure 5 It is a schematic diagram of the structure of the receiving plate of the present invention;

[0043] Figure 6 It is a structural schematic diagram of the first rack of the receiving plate of the present invention;

[0044] Figure 7 It is a schematic diagram of the linkage structure of the present invention;

[0045] Figure 8 It is a schematic diagram of the structure of the splicing frame of the present invention;

[0046] Numbers in the figure: 1, support body; 2, first end; 21, screw hole; 3, second end; 4, notch; 5, extrusion mechanism; 51, travel rod; 511, rotating handle; 512, connector; 52, extrusion head; 6, receiving mechanism; 61, receiving plate; 611, channel; 612, sliding plate; 613, pressure plate; 614, pressure surface; 62, baffle; 621, contact surface; 622, blind Hole; 623, limit strip; 624, chamfer; 7, locking piece; 71, first rack; 72, movable plate; 73, second rack; 8, linkage piece; 81, linkage rod; 82, extrusion cone head; 83, ramp; 84, pressure block; 9, arc groove; 10, support foot; 11, slide groove; 12, splicing frame; 13, push rod; 14, friction plate; 15, splicing end; 16, splicing head; 17, bump. DETAILED DESCRIPTION

[0047] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described in conjunction with the following embodiments. It should be understood that the following text is only used to describe a dual-flow-channel turbocharger flow channel sand core fixing device or several specific implementations of the present invention, and does not strictly limit the protection scope of the specific request of the present invention.

[0048] like Figure 1 As shown, the existing dual-channel turbocharger flow channel core fixing device mentioned in the above background technology, the fixing device is a spring clamp structure, after the two flow channel sand cores are bonded, the sand core is clamped with a clip, and the clip is removed after the adhesive is cured, and the clip arm is very likely to press the sand core, causing one end of the sand core to tilt up and the position of the small flow channel to be out of tolerance; and the spring structure has good yielding performance. When multiple sand cores are stacked together, the clip does not originally press the sand core, but under the squeezing or bumping of other sand cores, it changes and finally presses the sand core.

[0049] Compared with the above-mentioned existing device, reference Figure 2-Figure 3The invention discloses a dual-channel turbocharger flow channel sand core fixing device, which is used to fix two bonded flow channel sand cores until the bonding state of the two flow channel sand cores is stable. The fixing device comprises a support body 1, an extrusion mechanism 5, a receiving mechanism 6 and a locking member 7; the support body 1 is defined with a first end 2 and a second end 3, and the first end 2 and the second end 3 are coaxially arranged; and the support body 1 is provided with a notch 4 between the first end 2 and the second end 3 for avoiding the two flow channel sand cores; the extrusion mechanism 5 comprises a travel rod 51 moving along the axial direction of the first end 2, and the travel rod 51 moves along the axial direction of the first end 2. An extrusion head 52 is installed at one end of the rod 51 located at the second end 3, and the travel rod 51 is configured to drive the extrusion head 52 to move toward the second end 3 or away from the second end 3; the receiving mechanism 6 includes a receiving plate 61 installed on the second end 3 and facing the first end 2, and a plurality of baffles 62 are provided on the edge of the receiving plate 61, and each baffle 62 is radially slidably arranged along the receiving plate 61, and the baffle 62 slides to adjust the distance between it and the receiving plate 61; and a locking member 7 is provided in the baffle 62, and the locking member 7 is configured to lock the position of each baffle 62 at least when the receiving plate 61 is subjected to force.

[0050] The shape of the slot 4 can be set according to the requirements, such as arc shape, C shape, etc. The setting specification is that after fixed assembly, the minimum distance between the inner surface of the slot 4 and the two flow channel sand cores is not less than two centimeters, so as to ensure that the slot 4 does not squeeze the flow channel sand core, reduce the scrap rate, and stabilize the product quality;

[0051] Regarding the setting of the traveling rod 51, in the present invention, reference is made to Figure 2-Figure 4 As shown, a screw hole 21 is provided along the axial direction of the first end portion 2, and the travel rod 51 is a screw mechanism. The travel rod 51 is engaged with the screw hole 21, and the travel rod 51 is rotated to adjust the feed amount of the extrusion head 52; and for the driving part of the travel rod 51, Figure 3 For example, the present invention adopts two methods. In the first method, a rotating handle 511 is provided at one end of the traveling rod 51 away from the extrusion head 52, and the traveling rod 51 is rotated by operating the handle. In the second method, a connecting head 512 is provided at one end of the traveling rod 51 away from the extrusion head 52, and the connecting head 512 is used to be spliced ​​with the output end of the power mechanism, and the traveling rod 51 is driven by the power mechanism to rotate. The selection and setting are based on actual needs.

[0052] When working:

[0053] The operating travel rod 51 is moved to make the extrusion head 52 away from the receiving plate 61, leaving enough space for the flow channel sand core to be placed after bonding. The structure at one end of the flow channel sand core is against the receiving plate 61. The actual size of the structure pushes the receiving plate 61 to slide, thereby expanding the corresponding space. Figure 2As shown, one side of each baffle plate 62 facing the center of the receiving plate 61 is defined as a contact surface 621, and a plurality of blind holes 622 are arranged on the contact surface 621. A limit strip 623 is installed in each blind hole 622, and the limit strip 623 is configured to be driven by elastic force and tend to extend out of the blind hole 622 or be compressed into the blind hole 622 by external force; and the top area of ​​each limit strip 623 extending out of the blind hole 622 is chamfered 624, so that it can be staggeredly retracted into or extended out of the blind hole 622 under the action of the extrusion force, forming a spatial structure wrapped in the structure of the core head of the sand core against the receiving plate 61, so as to avoid errors caused by side sliding; by controlling the travel rod 51 to move toward the receiving, it contacts and squeezes the other end of the sand core to form a clamped and fixed state.

[0054] Based on the above operation process, in the present invention, reference Figure 5-6 As shown, a plurality of radially arranged channels 611 are provided on the receiving plate 61, a sliding plate 612 is installed in each channel 611, and each baffle 62 is installed at one end of a corresponding sliding plate 612 extending out of the channel 611; the locking member 7 comprises a first rack 71, a movable plate 72 and a second rack 73; a first rack 71 is installed at each sliding plate 612 near the center of the receiving plate 61; the movable plate 72 is installed inside the receiving plate 61 and is located below the sliding plate 612, and moves in a vertical direction when subjected to force; and a second rack 73 is installed at the corresponding position of each first rack 71 of the movable plate 72, and the second rack 73 is engaged or separated with the first rack 71 as the movable plate 72 moves; when the second rack 73 is engaged with the first rack 71, the sliding plate 612 is in a locked state; when the second rack 73 is separated from the first rack 71, the sliding plate 612 is in an unlocked state.

[0055] When the receiving plate 61 is subjected to force, the force is transmitted to the sliding plate 612 for locking operation. Figure 5-Figure 7As shown, a pressure plate 613 is installed at the top of the receiving plate 61, and the top surface of the pressure plate 613 is defined as a pressure surface 614, and the pressure surface 614 is configured to produce a certain displacement in the vertical direction; a linkage member 8 is installed in the receiving plate 61, and the linkage member 8 is arranged between the pressure surface 614 and the movable plate 72, and the linkage member 8 is used to drive the movable plate 72 to move synchronously in the vertical direction when the pressure surface 614 is displaced; the linkage member 8 includes: a linkage rod 81, an extrusion cone head 82, a slope 83 and a pressure block 84, one end of the linkage rod 81 is connected to the pressure surface 614, and the other end extends to the bottom of the movable plate 72; the extrusion cone head 82 is installed at the extended end of the linkage rod 81; a pressure block 84 is slidably installed on the slope 83, and the pressure block 84 is configured to move downward with the extrusion cone head 82 When displacement occurs, the extrusion cone head 82 contacts the pressure block 84, and the pressure block 84 moves along the slope 83 to produce an upward displacement, and synchronously squeezes the movable plate 72 to move upward; the displacement generated when the pressure plate 613 is subjected to force is used to drive the linkage rod 81 to move, and the movement of the linkage rod 81 will drive the extrusion cone head 82 to move synchronously. Due to its structural characteristics, the pressure block 84 will be squeezed as it moves, causing the pressure block 84 to slide sideways. The pressure block 84 slides sideways along the slope 83, which will produce a displacement toward the sliding plate 612, thereby squeezing the sliding plate 612 to move, causing the first rack 71 and the second rack 73 to engage, and achieve locking. On the contrary, when there is no pressure, the pressure block 84 is reset due to its own gravity, the sliding plate 612 is reset, and the first rack 71 and the second rack 73 are separated.

[0056] On the other hand, reference Figure 2 As shown, in the present invention, an arc-shaped groove 9 is provided near the second end 3 of the support body 1, and a support foot 10 of a corresponding shape is hinged in the arc-shaped groove 9. The support foot 10 is used to support the support body 1 when it rotates out of the arc-shaped groove 9. This structure can realize the three-dimensional placement of a single support body 1, avoiding damage to the flow channel sand core caused by lying down;

[0057] Further, when clamping and fixing multiple sets of flow channel sand cores, Figure 3 and 8 As shown, a slide groove 11 is provided on the support body 1 in the vertical direction, and a splicing frame 12 is slidably installed in the slide groove 11. The splicing frame 12 is used for splicing and arranging two support bodies 1; one end of the splicing frame 12 is a sliding end, which is slidably installed in the slide groove 11; the other end of the splicing frame 12 is a splicing end 15, and a splicing joint 16 is installed at the splicing end 15;

[0058] A push rod 13 is installed in the splicing frame 12, one end of the push rod 13 extends into the slide groove 11, and a friction plate 14 is installed at the extended end of the push rod 13. The splicing head 16 is rotatably installed at the splicing end 15, and at least one protrusion 17 is provided on the splicing head 16. The protrusion 17 is used to squeeze the other end of the push rod 13 when the splicing head 16 rotates to a specific position, so that the push rod 13 is pushed to move, so that the friction plate 14 at the other end of the push rod 13 is close to the inner wall of the slide groove 11;

[0059] For example, the splicing joint 16 is set in a cylindrical shape and rotates with its axis. One or more protrusions 17 are set on its outer surface. The protrusion 17 is rotated to contact the end of the push rod 13 by rotation, and the push rod 13 is squeezed by the protrusion 17 to move in the splicing frame 12, thereby pushing the friction plate 14 to move; and for the splicing operation of the splicing joint 16, buckles and slots can be distributed at relative positions on its surface, and no matter when the buckle or the slot is rotated to the working position, the bump 17 is in the state of squeezing the push rod 13, so that the buckle of the splicing joint 16 on the main body of one splicing frame 12 is in the working position, and the slot of the splicing joint 16 on the main body of the adjacent splicing frame 12 is in the working position, and the two are adapted to splice;

[0060] Among them, reference Figure 3 As shown, the splicing frame 12 can be set in a triangular shape, which can be used for splicing and can also be moved along the slide groove 11 to adjust the position based on actual conditions. In addition, it can be slid to the lowest position and used as a bracket.

[0061] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this technical field, after knowing the contents recorded in the present invention, they can make several equivalent changes and substitutions without departing from the principle of the present invention. These equivalent changes and substitutions should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A dual-channel turbocharger flow channel sand core fixing device, used to fix two bonded flow channel sand cores until the bonding state of the two flow channel sand cores is stable, characterized in that: The fixing device comprises: A support body, wherein the support body defines a first end and a second end, wherein the first end and the second end are coaxially arranged; and The support body is provided with a notch between the first end and the second end for avoiding two flow channel sand cores; The extrusion mechanism comprises a travel rod moving along the axis direction of the first end, the travel rod being located at one end of the second end and having an extrusion head mounted thereon, the travel rod being configured to drive the extrusion head to move toward the second end or away from the second end; A receiving mechanism, comprising a receiving plate installed on the second end and facing the first end, wherein a plurality of baffles are provided at the edge of the receiving plate, each of the baffles is radially slidably arranged along the receiving plate, and the baffles are slidably adjusted to adjust the distance between the baffles and the receiving plate; and A locking member is provided in the baffle, and the locking member is configured to lock the position of each baffle at least when the receiving plate is subjected to force; The support body is provided with a slide groove in the vertical direction, a splicing frame is slidably installed in the slide groove, and the splicing frame is used to connect the splicing arrangement between two support bodies; one end of the splicing frame is a sliding end, which is slidably installed in the slide groove; the other end of the splicing frame is a splicing end, and a splicing joint is installed on the splicing end; Among them, a push rod is installed in the splicing frame, one end of the push rod extends into the slide groove, and a friction plate is installed on the extended end of the push rod, the splicing joint is rotatably installed at the splicing end, and at least one protrusion is provided on the splicing joint, and the protrusion is used to squeeze the other end of the push rod when the splicing joint is rotated to a specific position, pushing the push rod to produce displacement, so that the friction plate at the other end of the push rod is close to the inner wall of the slide groove.

2. A dual-channel turbocharger flow channel sand core fixing device according to claim 1, characterized in that: The minimum distance between the inner surface of the notch and the two assembled flow channel sand cores is not less than two centimeters.

3. A dual-flow-channel turbocharger flow channel sand core fixing device according to claim 1, characterized in that: The first end portion is provided with a screw hole along the axial direction, the travel rod is a screw mechanism, the travel rod is engaged with the screw hole, and the travel rod is rotated to adjust the feed amount of the extrusion head.

4. A dual-flow-channel turbocharger flow channel sand core fixing device according to claim 3, characterized in that: A rotating handle is provided at one end of the traveling rod away from the extrusion head, and the traveling rod is rotated by operating the handle, or a connecting head is provided at one end of the traveling rod away from the extrusion head, and the connecting head is used to be spliced ​​with the output end of the power mechanism, and the traveling rod is driven to rotate by the power mechanism.

5. The dual-flow-channel turbocharger flow channel sand core fixing device according to claim 1, characterized in that: The side of each baffle plate facing the center of the receiving plate is defined as a contact surface, and a plurality of blind holes are arranged on the contact surface. A limit bar is installed in each blind hole, and the limit bar is configured to be driven by elastic force to extend out of the blind hole or to be compressed into the blind hole by external force; and The top area of ​​each of the limiting strips extending out of the blind hole is chamfered.

6. A dual-flow-channel turbocharger flow channel sand core fixing device according to claim 1, characterized in that: The receiving plate is provided with a plurality of radially arranged channels, each of which is provided with a sliding plate, and each of the baffles is provided with an end of a corresponding sliding plate extending out of the channel; The locking member comprises: A first rack, each of the sliding plates is provided with a first rack near the center of the receiving plate; A movable plate, installed inside the receiving plate and located below the sliding plate, and moving in a vertical direction when subjected to force; and A second rack, wherein each of the movable plates is provided with a second rack at a position corresponding to each of the first racks, and the second rack is engaged with or separated from the first rack as the movable plate moves; and When the second rack is meshed with the first rack, the sliding plate is in a locked state; When the second rack is separated from the first rack, the sliding plate is in an unlocked state.

7. A dual-flow-channel turbocharger flow channel sand core fixing device according to claim 6, characterized in that: A pressure plate is installed on the top of the receiving plate, and the top surface of the pressure plate is defined as a pressure surface, and the pressure surface is configured to generate a certain displacement in the vertical direction; Wherein, a linkage member is installed in the receiving plate, the linkage member is arranged between the pressure surface and the movable plate, and the linkage member is used to drive the movable plate to move synchronously in the vertical direction when the pressure surface is displaced.

8. The dual-flow-channel turbocharger flow channel sand core fixing device according to claim 7, characterized in that: The linkage comprises: A linkage rod, one end of which is connected to the pressure surface, and the other end of which extends below the movable plate; An extrusion cone head is installed at the extended end of the linkage rod; A slope is provided on which a pressure block is slidably mounted. The pressure block is configured to move downward along with the extrusion cone head. The extrusion cone head contacts the pressure block. The pressure block moves along the slope to generate an upward displacement and simultaneously squeezes the movable plate to move upward.

9. The dual-flow-channel turbocharger flow channel sand core fixing device according to claim 1, characterized in that: The support body is provided with an arc-shaped groove near the second end, and a support foot with a corresponding shape is hinged in the arc-shaped groove. The support foot is used to support the support body when it rotates out of the arc-shaped groove.

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