Precoated sand core shooter for water chamber machining

Abstract

The utility model provides a precoated sand core shooter for processing a water chamber, which relates to the technical field of precoated sand core shooters, and comprises a core shooter main body, an electric telescopic rod is arranged on the inner wall of one side of the core shooter main body, a spray head is arranged at the bottom of the electric telescopic rod, a storage box is arranged on one side of the inner wall of the core shooter main body, and the storage box is connected with the electric telescopic rod. A connecting pipe is arranged on one side of the storage box, the end, away from the storage box, of the connecting pipe is connected with the spray head, an operation panel is arranged on one side of the core shooter body, an operation table is arranged at the bottom of the core shooter body, a core box mold is arranged at the top of the operation table, and a limiting device is arranged at the top of the operation table. When the limiting device is used, the core box mold is manually placed at the top of the connecting block, then the moving strip is pulled in the direction close to the connecting plate through the first spring, the moving strip is extruded on one side of the core box mold, and therefore the mold can be clamped through the moving strip and the connecting plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coated sand core shooting machine, especially to the coated sand core shooting machine for water chamber processing. BACKGROUND

[0002] The coated sand core shooting machine is a device for processing water chamber in water chamber processing. When using the coated sand core shooting machine, the core box mold is placed on the top of the operation table, the spray head is squeezed through the electric telescopic rod, and the coated sand arranged inside the storage box is sprayed out through the connecting pipe. In this way, the core box mold can be processed, and the water chamber can be conveniently processed.

[0003] The inventor found that the coated sand core shooting machine still has at least the following problems in daily work: when using the coated sand core shooting machine, the core box mold is placed on the top of the operation table, the spray head is squeezed through the electric telescopic rod, and the coated sand arranged inside the storage box is sprayed out through the connecting pipe. In this way, the inside can be processed, and the water chamber can be conveniently processed. However, in the actual use process, when the core box mold is arranged on the top of the operation table, the core box mold may move during processing due to different sizes of the core box mold, thereby affecting the processing to some extent. UTILITY MODEL CONTENT

[0004] The utility model discloses a coated sand core shooting machine for water chamber processing to solve the problems in the prior art.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a coated sand core shooting machine for water chamber processing, comprising a core shooting machine main body, an electric telescopic rod is arranged on the inner wall of one side of the core shooting machine main body, a spray head is arranged at the bottom of the electric telescopic rod, a storage box is arranged on one side of the inner wall of the core shooting machine main body, a connecting pipe is arranged on one side of the storage box, the connecting pipe is connected with the spray head at the end away from the storage box, an operation panel is arranged on one side of the core shooting machine main body, an operation table is arranged at the bottom of the core shooting machine main body, a core box mold is arranged on the top of the operation table, a limiting device is arranged on the top of the operation table, a sliding device is arranged on the top of the operation table, the limiting device comprises a connecting block, the connecting block is arranged on the top of the operation table, a connecting plate is fixedly connected on one side of the connecting block, the core box mold is arranged on the top of the connecting block, a first damping rod is uniformly fixedly connected on the side close to the connecting block of the connecting plate, a moving strip is fixedly connected at the end away from the connecting plate of the first damping rod, a first spring is sleeved on the surface of the first damping rod, one end of the first spring is fixedly connected with one side of the connecting plate, and the end close to the first damping rod of the first spring is fixedly connected with one side of the moving strip.

[0006] The effect achieved by the above components is that when the limiting device is used, the core box mold is manually placed on the top of the connecting block, and then the moving strip is pulled towards the connecting plate by the first spring, so that the moving strip is pressed on one side of the core box mold, so that the mold is clamped by the moving strip and the connecting plate, and then the core box mold is conveniently limited on the top of the connecting block.

[0007] Preferably, one side of the connecting plate is provided with a groove, a threaded rod is rotatably inserted into the inner wall of the groove, the screw threads on the surface of the threaded rod are opposite to each other from the middle, a pressing block is sleeved on the surface of the threaded rod, and the pressing block is in sliding connection with the inner wall of the groove.

[0008] The effect achieved by the above components is that the threaded rod is manually controlled to rotate, and because the screw threads on the surface of the threaded rod are opposite to each other from the middle, the two pressing blocks can be well controlled to move towards the mold at the same time, and the mold is well limited on the top of the connecting block.

[0009] Preferably, a first bevel gear is fixedly connected to the middle of the threaded rod, a support frame is fixedly connected to one side of the connecting plate, a rotating rod is rotatably inserted into one side of the support frame, a second bevel gear is fixedly connected to one end of the rotating rod close to the connecting plate, and the first bevel gear and the second bevel gear are in meshing engagement.

[0010] The effect achieved by the above components is that the rotating rod drives the second bevel gear to rotate, and because the first bevel gear and the second bevel gear are in meshing engagement, the first bevel gear can be well driven to rotate through the rotating rod.

[0011] Preferably, a sliding groove is formed in one side of the connecting plate, a sliding rod is fixedly connected to the inner wall of the sliding groove, a connecting strip is sleeved on the surface of the sliding rod, a baffle is fixedly connected to one end of the connecting strip away from the sliding groove, a second spring is sleeved on the surface of the sliding rod, the top of the second spring is fixedly connected to the top of the inner wall of the sliding groove, and one end of the second spring close to the sliding rod is fixedly connected to the top of the connecting strip.

[0012] The effect achieved by the above components is that the connecting strip is pulled towards the top of the sliding groove by the second spring, so that the baffle can be well arranged on one side of the rotating rod away from the connecting plate, and the rotating rod can be well avoided from being accidentally touched.

[0013] Preferably, the sliding device comprises a sliding rail, the sliding rail and the top of the operation table are fixedly connected, the inner wall of the sliding rail is in sliding connection with the connecting block, and the top of the operation table is fixedly connected with a clamping strip.

[0014] The effects achieved by the above components are that when the sliding device is used, the manual control connecting block slides in the inner wall of the slide rail, and then the connecting block slides out of the slide rail, so that the connecting block is away from the bottom of the nozzle, and the mold is conveniently arranged on the top of the connecting block.

[0015] Preferably, the bottom of the connecting block is provided with a connecting groove, and the inner wall of the connecting groove is fixedly connected with a round rod, and the surface of the round rod is rotatably sleeved with a roller.

[0016] The effects achieved by the above components are that when the connecting block is controlled to slide in the inner wall of the slide rail, the roller is driven to rotate on the top of the operation table, so that the connecting block can be well supported on the top of the operation table, and then the connecting block can be driven to slide in the inner wall of the slide rail.

[0017] Preferably, the side away from the connecting block of the connecting plate is fixedly connected with a fixed groove, the inner wall of the fixed groove is fixedly connected with a limiting rod, the surface of the limiting rod is slidably sleeved with an L-shaped plate, the surface of the limiting rod is sleeved with a third spring, one end of the third spring away from the limiting rod is fixedly connected with the bottom of the inner wall of the fixed groove, and the end away from the fixed groove of the L-shaped plate is arranged on the side away from the operation table of the clamping strip.

[0018] The effects achieved by the above components are that when the connecting block is away from the slide rail, the L-shaped plate is extruded by the third spring away from the fixed groove, so that the end away from the fixed groove of the L-shaped plate is arranged on the side away from the operation table of the clamping strip, and the connecting block can be well limited on the part of the top of the operation table away from the slide rail.

[0019] Preferably, one side of the slide rail is provided with a receiving groove, the inner wall of the receiving groove is slidably connected with a positioning plate, one side of the inner wall of the receiving groove is fixedly connected with a second damping rod, one end of the second damping rod away from the receiving groove is fixedly connected with one side of the positioning plate, the surface of the second damping rod is sleeved with a fourth spring, one end of the fourth spring is fixedly connected with one side of the inner wall of the receiving groove, one end of the fourth spring close to the second damping rod is fixedly connected with one side of the positioning plate, and one side close to the slide rail of the positioning plate is provided with a positioning strip, and one end of the positioning strip is fixedly connected with one side of the L-shaped plate.

[0020] The effects achieved by the above components are that after the connecting block is manually slid into the slide rail, the receiving groove is extruded by the fourth spring away from the receiving groove, so that the positioning plate can be arranged outside the receiving groove, and then the positioning strip can be arranged on one side close to the slide rail of the positioning plate, and the connecting block can be well limited in the slide rail.

[0021] The utility model discloses a limiting device is provided with the connecting block, the connecting plate, the recess, the threaded rod, the extruding block, the first bevel gear, the support frame, the rotating rod, the second bevel gear, the sliding groove, the sliding rod, the second spring, the connecting strip, the baffle, the first damping rod, the first spring, the moving strip, the sliding device, the core box mould is placed on the top of connecting block through manual when using the limiting device, and then through the first spring to the direction of approaching connecting plate pull -drag moving strip, and moving strip extrusion is at one side of core box mould, and this can pass through moving strip and connecting plate and hold the mould, and then conveniently the core box mould is limited at the top of connecting block. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A three-dimensional structural schematic view of the film-coated sand core shooting machine for water chamber processing is provided for the utility model;

[0023] Figure 2 A three-dimensional structural schematic view of the novel threaded rod is provided for the utility model;

[0024] Figure 3 A three-dimensional structural schematic view of the novel positioning plate is provided for the utility model;

[0025] Figure 4 A three-dimensional structural schematic view of the novel L-shaped plate is provided for the utility model.

[0026] Legend: 1, core shooting machine main body; 2, electric telescopic rod; 3, spray head; 4, storage box; 5, connecting pipe; 6, operation panel; 7, operation table; 8, limiting device; 801, connecting block; 802, connecting plate; 803, recess; 804, threaded rod; 805, extruding block; 806, first bevel gear; 807, support frame; 808, rotating rod; 809, second bevel gear; 810, sliding groove; 811, sliding rod; 812, second spring; 813, connecting strip; 814, baffle; 815, first damping rod; 816, first spring; 817, moving strip; 9, sliding device; 901, sliding rail; 902, clamping strip; 903, connecting groove; 904, round rod; 905, roller; 906, fixed groove; 907, limiting rod; 908, L-shaped plate; 909, third spring; 910, positioning strip; 911, storage groove; 912, positioning plate; 913, second damping rod; 914, fourth spring; 10, core box mould. DETAILED DESCRIPTION

[0027] Example 1, as Figures 1-4As shown, the water chamber processing film sand core shooting machine, the inner wall of one side of the core shooting machine main body 1 is provided with electric telescopic rod 2, the bottom of electric telescopic rod 2 is provided with spray head 3, one side of the inner wall of core shooting machine main body 1 is provided with storage box 4, one side of storage box 4 is provided with connecting pipe 5, the end of connecting pipe 5 away from storage box 4 is connected with spray head 3, one side of core shooting machine main body 1 is provided with operation panel 6, the bottom of core shooting machine main body 1 is provided with operation table 7, the top of operation table 7 is provided with core box mold 10, the top of operation table 7 is provided with limiting device 8, the top of operation table 7 is provided with sliding device 9, when using film sand core shooting machine, core box mold 10 is placed on the top of operation table 7, spray head 3 is extruded through electric telescopic rod 2, and then film sand arranged inside storage box 4 is sprayed out through connecting pipe 5, so that core box mold 10 can be processed, so that the water chamber can be processed.

[0028] Referring to Figure 2 and Figure 3The limiting device 8 comprises a connecting block 801 provided on the top of the operation table 7, one side of the connecting block 801 is fixedly connected with a connecting plate 802, the core box mold 10 is arranged on the top of the connecting block 801, the connecting plate 802 is uniformly fixedly connected with a first damping rod 815 on the side close to the connecting block 801, the first damping rod 815 is fixedly connected with a moving strip 817 at the end away from the connecting plate 802, the surface of the first damping rod 815 is sleeved with a first spring 816, one end of the first spring 816 is fixedly connected with the connecting plate 802, the end of the first spring 816 close to the first damping rod 815 is fixedly connected with the moving strip 817, when the limiting device 8 is used, the core box mold 10 is manually placed on the top of the connecting block 801, and then the moving strip 817 is pulled to the direction close to the connecting plate 802 through the first spring 816, so that the moving strip 817 is pressed on one side of the core box mold 10, so that the mold is clamped through the moving strip 817 and the connecting plate 802, and then the core box mold 10 is conveniently limited on the top of the connecting block 801, a groove 803 is arranged on one side of the connecting plate 802, a threaded rod 804 is rotatably inserted into the inner wall of the groove 803, the screw threads on the surface of the threaded rod 804 are opposite to each other from the middle, the surface of the threaded rod 804 is sleeved with a pressing block 805, the pressing block 805 is slidably connected with the inner wall of the groove 803, the threaded rod 804 is manually controlled to rotate, because the screw threads on the surface of the threaded rod 804 are opposite to each other from the middle, the two pressing blocks 805 can be well controlled to move towards the mold at the same time, and then the mold is well limited on the top of the connecting block 801, a first bevel gear 806 is fixedly connected in the middle of the threaded rod 804, a support frame 807 is fixedly connected on one side of the connecting plate 802, a rotating rod 808 is rotatably inserted into one side of the support frame 807, a second bevel gear 809 is fixedly connected to the end of the rotating rod 808 close to the connecting plate 802, the first bevel gear 806 and the second bevel gear 809 are meshed with each other, the rotating rod 808 is manually controlled to drive the second bevel gear 809 to rotate, because the first bevel gear 806 and the second bevel gear 809 are meshed with each other, the rotating rod 808 can well drive the first bevel gear 806 to rotate, a sliding groove 810 is arranged on one side of the connecting plate 802, a sliding rod 811 is fixedly connected to the inner wall of the sliding groove 810, a connecting strip 813 is slidably sleeved on the surface of the sliding rod 811, a baffle 814 is fixedly connected to the end of the connecting strip 813 away from the sliding groove 810, a second spring 812 is sleeved on the surface of the sliding rod 811, the top of the second spring 812 is fixedly connected with the top of the inner wall of the sliding groove 810, the end of the second spring 812 close to the sliding rod 811 is fixedly connected with the top of the connecting strip 813, the connecting strip 813 is pulled to the top of the sliding groove 810 through the second spring 812, so that the baffle 814 can be well arranged on the side of the rotating rod 808 away from the connecting plate 802, so that the rotating rod 808 can be well avoided from being touched by mistake.

[0029] Referring to Figure 4The sliding device 9 comprises a sliding rail 901 fixedly connected with the top of the operation table 7, the inner wall of the sliding rail 901 is in sliding connection with the connecting block 801, the top of the operation table 7 is fixedly connected with a clamping strip 902, when the sliding device 9 is used, the connecting block 801 is manually controlled to slide in the inner wall of the sliding rail 901, so that the connecting block 801 slides out of the sliding rail 901, so that the connecting block 801 is away from the bottom of the spray head 3, so that the mold is arranged on the top of the connecting block 801, the bottom of the connecting block 801 is provided with a connecting groove 903, the inner wall of the connecting groove 903 is fixedly connected with a round rod 904, the surface of the round rod 904 is rotatably sleeved with a roller 905, when the connecting block 801 is controlled to slide in the inner wall of the sliding rail 901, the roller 905 is driven to rotate on the top of the operation table 7, so that the connecting block 801 can be well supported on the top of the operation table 7, thereby facilitating the driving of the connecting block 801 to slide in the inner wall of the sliding rail 901, the side, away from the connecting block 801, of the connecting plate 802 is fixedly connected with a fixed groove 906, the inner wall of the fixed groove 906 is fixedly connected with a limiting rod 907, the surface of the limiting rod 907 is slidably sleeved with an L-shaped plate 908, the surface of the limiting rod 907 is sleeved with a third spring 909, the top of the third spring 909 and the bottom of one side of the L-shaped plate 908 are fixedly connected, one end of the third spring 909, close to the limiting rod 907, and the bottom of the inner wall of the fixed groove 906 are fixedly connected, one end of the L-shaped plate 908, away from the fixed groove 906, is arranged on the side, away from the operation table 7, of the clamping strip 902, when the connecting block 801 is away from the sliding rail 901, the L-shaped plate 908 is extruded by the third spring 909 in a direction away from the fixed groove 906, so that one end of the L-shaped plate 908, away from the fixed groove 906, is arranged on the side, away from the operation table 7, of the clamping strip 902, so that the connecting block 801 can be well limited on the part of the top of the operation table 7, away from the sliding rail 901, the side of the sliding rail 901 is provided with a receiving groove 911, the inner wall of the receiving groove 911 is slidably connected with a positioning plate 912, one side of the inner wall of the receiving groove 911 is fixedly connected with a second damping rod 913, one end of the second damping rod 913, away from the receiving groove 911, and one side of the positioning plate 912 are fixedly connected, the surface of the second damping rod 913 is sleeved with a fourth spring 914, one end of the fourth spring 914 and one side of the inner wall of the receiving groove 911 are fixedly connected, one end of the fourth spring 914, close to the second damping rod 913, and one side of the positioning plate 912 are fixedly connected, the side, close to the sliding rail 901, of the positioning plate 912 is provided with a positioning strip 910, one end of the positioning strip 910 and one side of the L-shaped plate 908 are fixedly connected, after the connecting block 801 is manually slid into the sliding rail 901, the receiving groove 911 is extruded by the fourth spring 914 in a direction away from the receiving groove 911, so that the positioning plate 912 can be arranged outside the receiving groove 911, thereby arranging the positioning strip 910 on the side, close to the sliding rail 901, of the positioning plate 912, so that the connecting block 801 can be well limited in the sliding rail 901.

[0030] The working principle is that when the coated sand core shooting machine is used, the core box mold 10 is placed on the top of the operation table 7, the spray head 3 is extruded through the electric telescopic rod 2, and then the coated sand in the storage box 4 is sprayed out through the connecting pipe 5, so that the core box mold 10 can be processed, which facilitates the processing of the water chamber. When the limiting device 8 is used, the core box mold 10 is manually placed on the top of the connecting block 801, and then the moving strip 817 is pulled towards the connecting plate 802 through the first spring 816, so that the moving strip 817 is extruded on one side of the core box mold 10. In this way, the mold can be clamped by the moving strip 817 and the connecting plate 802, and then the second bevel gear 809 is driven to rotate by the rotating rod 808, because the first bevel gear 806 and the second bevel gear 809 are meshed with each other, the first bevel gear 806 can be well driven to rotate by the rotating rod 808, and then the threaded rod 804 is controlled to rotate, because the threads on the surface of the threaded rod 804 are opposite to each other from the middle to both sides, the two extrusion blocks 805 can be well controlled to move towards the mold at the same time, and then the mold is well limited on the top of the connecting block 801, and then the core box mold 10 is well limited on the top of the connecting block 801. The second spring 812 pulls the connecting strip 813 towards the top of the sliding groove 810, so that the baffle 814 can be well arranged on the side of the rotating rod 808 away from the connecting plate 802, so that the rotating rod 808 can be well avoided from being touched by mistake. When the sliding device 9 is used, the connecting block 801 is manually controlled to slide on the inner wall of the sliding rail 901, and then the connecting block 801 slides out of the sliding rail 901, so that the connecting block 801 is away from the bottom of the spray head 3. When the connecting block 801 is controlled to slide on the inner wall of the sliding rail 901, the roller 905 is driven to rotate on the top of the operation table 7. When the connecting block 801 is away from the sliding rail 901, the L-shaped plate 908 is extruded away from the fixed groove 906 by the third spring 909, and then the end of the L-shaped plate 908 away from the fixed groove 906 is arranged on the side of the clamping strip 902 away from the operation table 7, so that the connecting block 801 can be well limited on the part of the operation table 7 away from the sliding rail 901. After the connecting block 801 is manually slid into the sliding rail 901, the receiving groove 911 is extruded away from the receiving groove 911 by the fourth spring 914, so that the positioning plate 912 is arranged outside the receiving groove 911, and then the positioning strip 910 is arranged on the side of the positioning plate 912 close to the sliding rail 901, so that the connecting block 801 can be well limited in the sliding rail 901, and then the mold can be arranged on the top of the connecting block 801.

[0031] It should be noted that all the damping rods in the case are telescopic dampers, which can absorb energy during telescoping.

Claims

1. A coated sand core shooter for water chamber processing, comprising a core shooter main body (1), characterized in that: The inner wall of one side of the core shooter body (1) is provided with an electric telescopic rod (2), the bottom of the electric telescopic rod (2) is provided with a spray head (3), one side of the inner wall of the core shooter body (1) is provided with a storage box (4), one side of the storage box (4) is provided with a connecting pipe (5), the connecting pipe (5) is connected together away from the storage box (4) one end and the spray head (3), one side of the core shooter body (1) is provided with an operation panel (6), the bottom of the core shooter body (1) is provided with an operation table (7), the top of the operation table (7) is provided with a core box mold (10), the top of the operation table (7) is provided with a limiting device (8), the top of the operation table (7) is provided with a sliding device (9), the limiting device (8) comprises a connecting block (801), the connecting block (801) is arranged on the top of the operation table (7), one side of the connecting block (801) is fixedly connected with a connecting plate (802), the core box mold (10) is arranged on the top of the connecting block (801), the connecting plate (802) is uniformly fixedly connected with a first damping rod (815) on the side close to the connecting block (801), one end of the first damping rod (815) away from the connecting plate (802) is fixedly connected with a moving strip (817), the surface of the first damping rod (815) is sleeved with a first spring (816), one end of the first spring (816) and one side of the connecting plate (802) are fixedly connected, one end of the first spring (816) close to the first damping rod (815) and one side of the moving strip (817) are fixedly connected.

2. The water room processing coated sand core shooter of claim 1, wherein: One side of the connecting plate (802) is provided with a groove (803), a threaded rod (804) is rotatably inserted into the inner wall of the groove (803), the screw thread direction of the surface of the threaded rod (804) is opposite from the middle to both sides, the surface of the threaded rod (804) is sleeved with a pressing block (805), the pressing block (805) is slidably connected with the inner wall of the groove (803).

3. The water room processing coated sand shot core machine according to claim 2, characterized in that: The middle of the threaded rod (804) is fixedly connected with a first bevel gear (806), one side of the connecting plate (802) is fixedly connected with a support frame (807), a rotating rod (808) is rotatably inserted into one side of the support frame (807), one end of the rotating rod (808) close to the connecting plate (802) is fixedly connected with a second bevel gear (809), the first bevel gear (806) and the second bevel gear (809) are engaged with each other.

4. The water room processing coated sand shot core machine according to claim 1, characterized in that: One side of the connecting plate (802) is provided with a sliding groove (810), the inner wall of the sliding groove (810) is fixedly connected with a sliding rod (811), the surface of the sliding rod (811) is slidably sleeved with a connecting strip (813), one end of the connecting strip (813) away from the sliding groove (810) is fixedly connected with a baffle (814), the surface of the sliding rod (811) is sleeved with a second spring (812), the top of the second spring (812) and the top of the inner wall of the sliding groove (810) are fixedly connected, one end of the second spring (812) close to the sliding rod (811) and the top of the connecting strip (813) are fixedly connected.

5. The water room processing coated sand shot core machine according to claim 1, characterized in that: The sliding device (9) comprises a sliding rail (901), the sliding rail (901) is fixedly connected with the top of the operation table (7), the inner wall of the sliding rail (901) is slidably connected with the connecting block (801), and the top of the operation table (7) is fixedly connected with a clamping groove (902).

6. The coated sand core shooter for water chamber machining according to claim 1, characterized in that: The bottom of the connecting block (801) is provided with a connecting groove (903), the inner wall of the connecting groove (903) is fixedly connected with a round rod (904), and the surface of the round rod (904) is rotatably sleeved with a roller (905).

7. The water room processing coated sand shot core machine according to claim 1, characterized in that: One side of the connecting plate (802) away from the connecting block (801) is fixedly connected with a fixed groove (906), the inner wall of the fixed groove (906) is fixedly connected with a limiting rod (907), the surface of the limiting rod (907) is slidably sleeved with an L-shaped plate (908), the surface of the limiting rod (907) is sleeved with a third spring (909), the top of the third spring (909) and the bottom of one side of the L-shaped plate (908) are fixedly connected, one end of the third spring (909) close to the limiting rod (907) and the bottom of the inner wall of the fixed groove (906) are fixedly connected, and one end of the L-shaped plate (908) away from the fixed groove (906) is arranged on one side of the clamping groove (902) away from the operation table (7).

8. The coated sand core shooter for water chamber processing according to claim 5, characterized in that: One side of the sliding rail (901) is provided with a receiving groove (911), the inner wall of the receiving groove (911) is slidably connected with a positioning plate (912), one side of the inner wall of the receiving groove (911) is fixedly connected with a second damping rod (913), one end of the second damping rod (913) away from the receiving groove (911) is fixedly connected with one side of the positioning plate (912), the surface of the second damping rod (913) is sleeved with a fourth spring (914), one end of the fourth spring (914) and one side of the inner wall of the receiving groove (911) are fixedly connected, one end of the fourth spring (914) close to the second damping rod (913) and one side of the positioning plate (912) are fixedly connected, and one side of the positioning plate (912) close to the sliding rail (901) is provided with a positioning strip (910), one end of the positioning strip (910) and one side of the L-shaped plate (908) are fixedly connected.

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