Automobile electrophoretic paint layer curing oven device

Abstract

The utility model provides an automobile electrophoretic paint layer curing oven device, which relates to the technical field of automobile accessory processing, and comprises a stable main body, a group of bolt mounting holes distributed up and down are arranged on one side of the stable main body, and a feed port is arranged on one side of the stable main body. A first positioning shell and a second positioning shell are arranged on the upper portion of the stabilizing body, and a filter and a pressing ring are installed in the first positioning shell and the second positioning shell respectively. A curing structure composed of a draught fan, a heater and a drainage shell can rapidly heat air and convey hot air flow to the surfaces of the automobile parts, meanwhile, a second electric motor in the diffusion mechanism drives an extrusion plate to rotate and drives a stirring plate to swing, a balancing weight enables the stirring plate to automatically reset, the hot air flow is effectively diffused, and the diffusion efficiency is improved. All parts of the automobile parts can be uniformly heated, the curing quality of an electrophoretic paint layer is greatly improved, and paint layer defects caused by non-uniform heating are reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing technology, and in particular to an automotive electrophoretic paint curing oven device. Background Technology

[0002] Currently in the automotive manufacturing industry, the anti-corrosion process for automotive parts requires an electrophoretic coating step. After the electrophoretic coating step is completed, it needs to be further cured in a curing oven. The curing of the electrophoretic coating layer is a key process to ensure the anti-corrosion and appearance quality of automotive parts. However, traditional automotive electrophoretic coating curing ovens have many problems, as follows:

[0003] Traditional curing ovens typically employ a rather crude heating method, resulting in significant temperature differences between different areas within the oven. Furthermore, an unreasonable airflow circulation system design prevents hot air from reaching all parts of the components sufficiently and evenly, easily leading to surface defects such as flow marks, bubbles, and orange peel. This not only affects the appearance quality of the product but may also reduce the protective performance and durability of the paint layer.

[0004] Traditional curing ovens have significant shortcomings in air filtration and exhaust gas treatment. On the one hand, the air entering the curing oven often contains a large amount of dust and impurities, which can adhere to the surface of automotive parts and affect the adhesion and gloss of the electrophoretic paint layer. On the other hand, the exhaust gas generated during the curing process is directly discharged into the environment without effective treatment. The volatile organic compounds (VOCs) and other harmful substances contained in the exhaust gas not only cause serious pollution to the atmospheric environment, but also endanger the health of the operators. Utility Model Content

[0005] This utility model discloses an automotive electrophoretic paint curing oven device. The operator opens the pneumatic door and sends the automotive parts suspended on the suspension frame into the curing oven via the movement of the chain. The pneumatic door is then closed to reduce heat loss. The heater continues to work, and the heated airflow cures and dries the automotive parts. At the same time, the second electric motor is started to drive the extrusion plate to rotate. The extrusion plate drives the actuating plate to swing. The counterweight causes the actuating plate to automatically reset. The actuating plate diffuses the heated airflow, making the curing of the automotive parts more uniform.

[0006] In a first aspect, this disclosure provides an automotive electrophoretic paint curing oven apparatus, specifically comprising: a stabilizing body, wherein a set of vertically distributed bolt mounting holes are provided on one side of the stabilizing body, a feed inlet is provided on one side of the stabilizing body, a first positioning housing and a second positioning housing are provided above the stabilizing body, a filter and a clamping ring are respectively installed inside the first positioning housing and the second positioning housing, a curing structure is installed inside the stabilizing body and the first positioning housing, the curing structure is composed of a fan, a heater and a flow guiding housing, a conveying mechanism and a diffusion mechanism are installed inside the stabilizing body, the conveying mechanism is composed of a first electric motor, a rotating shaft, a chain and a suspension frame, and the diffusion mechanism is composed of a second electric motor, an extrusion plate, a toggle plate, a positioning rod and a counterweight.

[0007] Furthermore, the rotating hole of the stabilizing body is provided with a positioning block with a bolt mounting hole at the upper position, and a first electric motor is installed at the upper position of the positioning block.

[0008] Furthermore, a set of rotating holes are opened on both sides of the stabilizing body, and two symmetrically distributed rotating shafts are installed at the positions of the rotating holes. The upper position of one of the rotating shafts is connected to the drive shaft of the first electric motor, a sprocket is installed on the outer position of the rotating shaft, and a set of chains is installed on the outer position of the sprocket.

[0009] Furthermore, a set of stabilizing blocks are installed at the center of the chain. The stabilizing blocks are cylindrical in structure, and a positioning groove is opened on one side of the stabilizing block. A suspension bracket is installed on the outer side of the stabilizing block with bolts, and one side of the bolts extends into the interior of the positioning groove.

[0010] Furthermore, a limiting plate is installed at the bottom of the filter, and a positioning strip is provided on the outer side of the limiting plate. The positioning strip has an arc structure. A set of positioning plates is provided above the heater and on the inner side of the second positioning housing. A limiting groove is opened on the inner side of the positioning plate, and the positioning strip extends into the interior of the limiting groove.

[0011] Furthermore, the second electric motor is installed on the outer side of the stable body, and the drive shaft of the second electric motor is fitted with an extrusion plate on the outer material, with rounded corners at the edges of the extrusion plate.

[0012] Furthermore, two symmetrically distributed drainage shells are installed on the inner side of the stable body, a drainage pipe is installed between the two drainage shells, a set of bolt mounting holes are opened at the corners of the drainage shells, and a discharge hole with a chamfer is opened in the middle of the drainage shell.

[0013] Furthermore, a rotating hole is opened on each side of the drainage shell, and a positioning rod is provided on each side of the actuating plate. The positioning rod is a cylindrical structure, passes through the interior of the rotating hole, and a counterweight is installed at the end of the positioning rod.

[0014] Furthermore, a flow hole is opened in the middle of the first positioning housing and the second positioning housing respectively. A positioning ring is provided at the bottom of the flow hole. A set of positioning holes is opened on the outer side of the positioning ring. A clamping ring is installed at the bottom of the positioning ring. A set of positioning blocks is provided at the edge of the clamping ring. The positioning blocks pass through the interior of the positioning holes. A set of support springs is installed on the outer side of the positioning blocks.

[0015] This utility model provides a curing oven device for automotive electrophoretic paint layers, which has the following beneficial effects:

[0016] The conveying mechanism, consisting of a first electric motor, a rotating shaft, a chain, and a suspension frame, can stably and automatically transport automotive parts. Multiple suspension frames can be installed on the chain to achieve continuous production and improve production efficiency.

[0017] The curing structure, consisting of a fan, heater, and flow-guiding housing, can quickly heat the air and deliver the hot airflow to the surface of automotive parts. At the same time, the second electric motor in the diffusion mechanism drives the extrusion plate to rotate, causing the actuating plate to swing. The counterweight makes the actuating plate automatically reset, effectively diffusing the hot airflow so that all parts of the automotive parts can be heated evenly, greatly improving the curing quality of the electrophoretic paint layer and reducing paint layer defects caused by uneven heating.

[0018] The filter adopts an activated carbon filtration structure and is installed in the first positioning housing and the second positioning housing to filter the incoming airflow and the outgoing exhaust gas, respectively. This not only ensures that the air entering the curing oven is clean and avoids impurities from contaminating the surface of the parts, but also effectively purifies the outgoing exhaust gas, reduces environmental pollution, and meets the requirements of environmentally friendly production.

[0019] The installation structure of each component of the device is reasonably designed. For example, the filter is positioned by the positioning plate and positioning strip cooperating with the limiting groove of the corresponding positioning plate. The flow-inducing housing is installed on the stable main body by bolts. The clamping ring is installed by the positioning block and the support spring and can easily clamp the filter. This design facilitates the installation, disassembly and replacement of each component, reduces the difficulty and cost of equipment maintenance, and improves the service life of the equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0021] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0022] In the attached diagram:

[0023] Figure 1 An axonometric schematic diagram of the overall structure of the curing oven of this application is shown;

[0024] Figure 2 This paper shows an axonometric schematic diagram of the robust main body and the heater cross-section structure of this application;

[0025] Figure 3 This application shows Figure 2 Front view structural diagram;

[0026] Figure 4 This application shows Figure 2 A schematic diagram of the axonal structure from an elevation viewpoint;

[0027] Figure 5 This application shows Figure 4 A schematic diagram of a partial axial side structure;

[0028] Figure 6 This paper shows an axonometric schematic diagram of the cross-sectional structure of the drainage housing, fan, and limiting plate of this application;

[0029] Figure 7 This paper shows an axial side view of the disassembled structure of the drainage shell, limiting plate, and clamping ring of this application;

[0030] Figure 8 An axonometric schematic diagram of the cross-sectional structure of the suspension frame of this application is shown;

[0031] Figure 9 A schematic diagram of the clamping ring's axial structure from an elevation view is shown in this application.

[0032] List of reference numerals

[0033] 1. Stabilize the main body; 101. First positioning shell; 102. Second positioning shell;

[0034] 2. Conveying mechanism; 201. First electric motor; 202. Rotating shaft; 203. Chain; 204. Suspension frame;

[0035] 3. Solidified structure; 301. Fan; 302. Heater; 303. Drainage housing;

[0036] 4. Filter; 401. Limit plate;

[0037] 5. Diffusion mechanism; 501. Second electric motor; 502. Extrusion plate; 503. Actuating plate; 504. Positioning rod; 505. Counterweight;

[0038] 6. Pressure ring. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] Example 1: Please refer to Figures 1 to 9 :

[0041] This utility model proposes an automotive electrophoretic paint curing oven device, comprising: a stable main body 1, with a set of vertically distributed bolt mounting holes on one side of the stable main body 1, and a feed inlet on one side of the stable main body 1. A pneumatic door needs to be installed at the positions of the feed inlet and bolt mounting holes, referring to existing technology. The control and installation structure of the pneumatic door are selected from existing mature technologies. A first positioning housing 101 and a second positioning housing 102 are located above the stable main body 1. A filter 4 and a clamping ring 6 are respectively installed inside the first positioning housing 101 and the second positioning housing 102. A flow hole is opened in the middle of the first positioning housing 101 and the second positioning housing 102. The bottom of the flow hole... A positioning ring is provided, with a set of positioning holes on the outer side of the positioning ring. A clamping ring 6 is installed at the bottom of the positioning ring, and a set of positioning blocks is provided at the edge of the clamping ring 6. The positioning blocks pass through the interior of the positioning holes, and the positioning blocks achieve the effect of lateral and circumferential positioning of the clamping ring 6. A set of support springs is installed on the outer side of the positioning blocks. The support springs elastically press the clamping ring 6 downward. When the filter 4 is installed at the bottom of the clamping ring 6, the clamping ring 6 is in close contact with the top of the filter 4 under the support of the spring. At this time, the airflow can be effectively filtered inside the filter 4. The internal filtration structure of the filter 4 is selected from the existing activated carbon structure. The two filters 4 cooperate with each other to filter the incoming airflow and the exhaust gas respectively.

[0042] In this embodiment of the disclosure, reference is made to Figures 1 to 9As shown, a limiting plate 401 is installed at the bottom of the filter 4. A positioning strip with an arc structure is provided on the outer side of the limiting plate 401. A set of positioning plates is provided above the heater 302 and inside the second positioning housing 102. A limiting groove is opened on the inner side of the positioning plate, and the positioning strip extends into the groove. The limiting plate 401, in conjunction with the positioning strip, achieves the vertical and circumferential positioning of the filter 4. A curing structure 3 is installed inside the main body 1 and the first positioning housing 101. The curing structure 3 consists of a fan 301, a heater 302, and a flow-guiding housing 303. The heater 302 is selected from commonly used models in automotive electrophoretic paint curing ovens in the prior art. Two symmetrically distributed air-draining housings 303 are installed on the inner side of the main body 1. An air-draining pipe is installed between the two air-draining housings 303, which connects the two air-draining housings 303. A set of bolt mounting holes are opened at the corners of the air-draining housings 303. Workers need to install the corresponding bolts at the bolt mounting holes to ensure the stability of the air-draining housings 303. A chamfered exhaust hole is opened in the middle of the air-draining housings 303. When the fan 301 is running, it will deliver outside air to the air-draining housings 303 at different positions. During this process, the airflow is rapidly heated by the heater 302. The heated airflow ultimately cures and dries the automotive parts.

[0043] In this embodiment of the disclosure, reference is made to Figures 1 to 9As shown, a set of conveying mechanisms 2 and a set of diffusion mechanisms 5 are installed on the inner side of the stabilizing body 1. The conveying mechanism 2 is composed of a first electric motor 201, a rotating shaft 202, a chain 203, and a suspension frame 204. A positioning block with bolt mounting holes is provided above the rotating hole of the stabilizing body 1. A first electric motor 201 is installed above the positioning block. The operator needs to install a set of bolts between the first electric motor 201 and the bolt mounting holes. After the bolts are installed, the first electric motor 201 is stabilized. A set of rotating holes is opened on both sides of the stabilizing body 1. Two symmetrically distributed rotating shafts 202 are installed at the positions of the rotating holes. The operator needs to use the existing rotating positioning structure to position the rotating shafts 202 vertically. The upper position of one of the rotating shafts 202 is connected to the first electric motor 201. The drive shaft of the electric motor 201 is connected, and the docking structure between the drive shaft and the rotating shaft 202 is achieved by means of a wedge key structure. The first electric motor 201 drives the rotating shaft 202 to rotate. A sprocket is installed on the outer side of the rotating shaft 202, and a set of chains 203 is installed on the outer side of the sprocket. It is concluded that when the rotating shaft 202 rotates, it can control the chain 203 to move laterally. A set of stabilizing blocks is installed at the center of the chain 203. The stabilizing blocks are cylindrical or rectangular. A positioning groove is opened on one side of the stabilizing block. A suspension bracket 204 is installed on the outer side of the stabilizing block with bolts. One side of the bolts extends into the interior of the positioning groove. The specific structure of the suspension bracket 204 can be flexibly selected according to the automotive parts. The corresponding suspension bracket 204 is selected to suspend and position the automotive parts. The specific positioning structure refers to the prior art.

[0044] In this embodiment of the disclosure, reference is made to Figures 1 to 9 As shown, the diffusion mechanism 5 is composed of a second electric motor 501, a pressing plate 502, a deflecting plate 503, a positioning rod 504, and a counterweight 505. The second electric motor 501 is installed on the outer side of the stable body 1. A pressing plate 502 is installed on the outer side of the drive shaft of the second electric motor 501. The edge of the pressing plate 502 is rounded. The operator controls the second electric motor 501 to drive the pressing plate 502 to rotate. A rotating hole is opened on each side of the flow-guiding housing 303. A positioning rod 504 is provided on each side of the deflecting plate 503. The positioning rod 504 is a cylindrical structure and passes through the interior of the rotating hole. A counterweight 505 is installed at the end of the positioning rod 504. The function of the counterweight 505 is to balance the deflecting plate 503 so that the deflecting plate 503 can automatically reset. When the deflecting plate 503 rotates, it can push the counterweight 505 and the deflecting plate 503 to swing. At this time, the deflecting plate 503 diffuses the heated airflow, so that the automotive parts are cured more evenly.

[0045] Example 2, based on Example 1, with reference to Figures 1 to 9As shown, a controller based on existing technology needs to be installed on the solid main body 1, and the controller needs to be electrically connected to the first electric motor 201, the heater 302, and the second electric motor 501 respectively, so as to control the first electric motor 201, the heater 302, and the second electric motor 501 with the help of the controller based on existing technology.

[0046] The working principle of this embodiment:

[0047] The equipment installation and preparation steps are as follows: Following the design requirements, the staff installs the pneumatic door at the bolt mounting holes and feed inlet on one side of the main body 1 using existing mature technology, ensuring its control and installation structure is stable and operating normally. The heater 302, conforming to the requirements of commonly used automotive electrophoretic paint curing ovens, is installed into the curing structure 3. The filter 4 and the clamping ring 6 are respectively installed inside the first positioning housing 101 and the second positioning housing 102 above the main body 1. The filter 4 is positioned vertically and circumferentially by the positioning strip on the limiting plate 401 engaging with the corresponding limiting groove on the positioning plate. The clamping ring 6 is installed by passing a positioning block through the positioning hole on the positioning ring, and a support spring is installed on the outside of the positioning block, allowing the clamping ring 6 to elastically press against the filter 4, ensuring effective airflow filtration.

[0048] Workers installed the first electric motor 201 with bolts at the positioning block above the rotating hole of the stabilizing body 1, ensuring a stable installation. Two symmetrically distributed rotating shafts 202 were installed in the rotating holes on both sides of the stabilizing body 1 using a rotational positioning structure based on existing technology. One of the rotating shafts 202 was connected to the drive shaft of the first electric motor 201 via a wedge key structure. A sprocket was installed on the outside of the rotating shaft 202, and a chain 203 was fitted onto it. Based on the shape of the automotive parts, a suitable suspension bracket 204 was selected and bolted onto the stabilizing block at the center of the chain 203, with the bolts extending into the positioning groove of the stabilizing block.

[0049] Workers install a curing structure 3 inside the solid body 1, including a fan 301, a heater 302, and a diversion housing 303. A diversion pipe is installed between the two diversion housings 303 to connect them, and the diversion housings 303 are fixed to the solid body 1 with bolts. A second electric motor 501 is installed on the outside of the solid body 1, and its drive shaft is connected to the extrusion plate 502. The positioning rods 504 on both sides of the actuating plate 503 pass through the rotation hole of the diversion housing 303, and a counterweight 505 is installed at the end of the positioning rod 504.

[0050] In the second embodiment, a controller based on existing technology needs to be installed on the stable main body 1, and the controller is electrically connected to the first electric motor 201, the heater 302, and the second electric motor 501 respectively.

[0051] The curing oven startup procedure involves the operator turning on the blower 301 to allow outside air to enter the intake housing 303. The air is then rapidly heated by the heater 302 to prepare for the subsequent curing of the components. In Embodiment 2, the first electric motor 201 is started via the controller, driving the rotating shaft 202 to rotate and causing the chain 203 to move laterally, thereby moving the suspension frame 204 and the suspended automotive components to the feed inlet position. If Embodiment 2 is not used, the first electric motor 201 is started manually and the same operation is performed.

[0052] In the parts conveying and curing process, the operator opens the pneumatic door and sends the automotive parts suspended on the suspension frame 204 into the curing oven via the movement of the chain 203. The pneumatic door is then closed to reduce heat loss. The heater 302 continues to work, and the heated airflow cures and dries the automotive parts. At the same time, the second electric motor 501 is started to drive the extrusion plate 502 to rotate. The extrusion plate 502 drives the actuating plate 503 to swing. The counterweight 505 causes the actuating plate 503 to automatically reset. The actuating plate 503 diffuses the heated airflow, making the curing of the automotive parts more uniform.

[0053] The operation monitoring steps of the curing oven are as follows: During the curing process of the parts, the staff observes the operating status of the equipment, including the operation of the fan 301, motor, chain 203, etc., to ensure that there are no abnormal noises or vibrations, and monitors the temperature inside the oven, which can be achieved by observing the working parameters of the heater 302 or by setting a temperature sensor inside the oven (if any).

[0054] The filtration effect of filter 4 can be checked by observing the cleanliness of the airflow or by periodically testing the exhaust emission indicators. If a decline in filtration effect is found, it should be dealt with in a timely manner.

[0055] In the parts removal process, after the automotive parts have cured, the staff opens the pneumatic door and drives the chain 203 to rotate in the opposite direction via the first electric motor 201, transporting the cured parts from the curing oven to the discharge port, removing the cured automotive parts, and then closing the pneumatic door.

[0056] The following points should be noted in this article:

[0057] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0058] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0059] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An automotive electrophoretic paint curing oven apparatus, comprising: The system comprises a stabilizing body (1), a curing structure (3), and a diffusion mechanism (5). A set of vertically distributed bolt mounting holes are provided on one side of the stabilizing body (1). A feed inlet is provided on one side of the stabilizing body (1). A first positioning housing (101) and a second positioning housing (102) are located above the stabilizing body (1). The system is characterized in that a filter (4) and a clamping ring (6) are respectively installed inside the first positioning housing (101) and the second positioning housing (102). The inner sides of the stabilizing body (1) and the first positioning housing (101) are... A set of curing structures (3) is installed. A fan (301) is installed above the second positioning housing (102). A heater (302) is installed inside the second positioning housing (102). Two symmetrically distributed diversion housings (303) are installed inside the stabilizing body (1). A diversion pipe is installed between the two diversion housings (303). The fan (301), heater (302) and diversion housing (303) together form the curing structure (3). A set of conveying mechanisms (2) and a set of diffusion mechanisms (5) are installed inside the stabilizing body (1).

2. The automotive electrophoretic paint curing oven apparatus according to claim 1, characterized in that, The rotating hole of the stabilizing body (1) is provided with a positioning block with a bolt mounting hole at the upper position, and a first electric motor (201) is installed at the upper position of the positioning block.

3. The automotive electrophoretic paint curing oven apparatus according to claim 2, characterized in that, A set of rotating holes are opened on both sides of the stabilizing body (1). Two symmetrically distributed rotating shafts (202) are installed at the position of the rotating holes. The upper position of one of the rotating shafts (202) is connected to the drive shaft of the first electric motor (201). A sprocket is installed on the outer side of the rotating shaft (202), and a set of chains (203) is installed on the outer side of the sprocket.

4. The automotive electrophoretic paint curing oven apparatus according to claim 3, characterized in that, A set of stabilizing blocks is installed at the center of the chain (203). A positioning groove is opened on one side of the stabilizing block. A suspension bracket (204) is installed on the outer side of the stabilizing block with bolts. One side of the bolts extends into the interior of the positioning groove. The first electric motor (201), the rotating shaft (202), the chain (203) and the suspension frame (204) together form the conveying mechanism (2).

5. The automotive electrophoretic paint curing oven apparatus according to claim 1, characterized in that, A limiting plate (401) is installed at the bottom of the filter (4). A positioning strip is provided on the outer side of the limiting plate (401). The positioning strip has an arc structure. A set of positioning plates is provided at the top of the heater (302) and the inner side of the second positioning housing (102). A limiting groove is opened on the inner side of the positioning plate, and the positioning strip extends into the interior of the limiting groove.

6. The automotive electrophoretic paint curing oven apparatus according to claim 1, characterized in that, The diffusion mechanism (5) is composed of a second electric motor (501), a pressing plate (502), a toggle plate (503), a positioning rod (504) and a counterweight (505). The second electric motor (501) is installed on the outside of the stable body (1), and the drive shaft of the second electric motor (501) is mounted on a pressing plate (502) on the outside material.

7. The automotive electrophoretic paint curing oven apparatus according to claim 1, characterized in that, A set of bolt mounting holes are provided at the corner of the drainage housing (303), and a discharge hole with a chamfer is provided in the middle of the drainage housing (303). The fan (301), heater (302) and drainage housing (303) are interconnected.

8. The automotive electrophoretic paint curing oven apparatus according to claim 6, characterized in that, The drainage housing (303) has a rotating hole on each side, and a positioning rod (504) is provided on each side of the actuating plate (503). The positioning rod (504) passes through the interior of the rotating hole, and a counterweight (505) is installed at the end of the positioning rod (504).

9. The automotive electrophoretic paint curing oven apparatus according to claim 1, characterized in that, A flow hole is opened in the middle of the first positioning housing (101) and the second positioning housing (102). A positioning ring is provided at the bottom of the flow hole. A set of positioning holes is opened on the outer side of the positioning ring. A clamping ring (6) is installed at the bottom of the positioning ring. A set of positioning blocks is provided at the edge of the clamping ring (6). The positioning blocks pass through the inside of the positioning holes. A set of support springs is installed on the outer side of the positioning blocks.

Images