Bms product test fixture

Abstract

The utility model discloses a BMS product test fixture relates to test fixture technical field, including box assembly, compression assembly, carrier plate subassembly and propulsion subassembly, compression assembly, carrier plate subassembly, propulsion subassembly all install on box assembly, and carrier plate subassembly is located the immediately below of compression assembly, and propulsion subassembly is located carrier plate subassembly one side, and the execution end of propulsion subassembly is set up to carrier plate subassembly, the utility model discloses through the positioning post of symmetrical distribution on the carrier plate body first completes product preliminary positioning, when compression assembly moves down, and corrects the column insertion product correction hole and realizes the positioning with the cooperation of spacing post, simultaneously guide sleeve no.

Description

Technical Field

[0001] This utility model relates to the field of test fixture technology, specifically to a test fixture for BMS products. Background Technology

[0002] As the core control unit of new energy equipment, the performance accuracy and interface reliability of the BMS (Battery Management System) directly determine the charging and discharging safety and service life of the battery pack. Therefore, before leaving the factory, it is necessary to complete multi-dimensional testing such as interface conductivity, signal transmission stability, and functional logic correctness through a special test fixture.

[0003] Existing fixtures typically achieve their clamping function in two ways: First, they employ a purely rigid structure without any buffer components. The clamping force relies entirely on the operator's experience, which can easily lead to deformation of the BMS product's outer shell and damage to internal components due to excessive force. This is especially true for miniaturized BMS products with thinner shells, where the risk of damage is even higher. Second, they use simple spring plates for clamping. However, the spring force is insufficient and there is no stable guide. During testing, the product is prone to loosening due to vibration or slight external contact, resulting in poor contact between the plug and socket, misjudging the interface continuity, and requiring re-clamping and testing. Although some fixtures have a simple pressing structure, they lack components to constrain the pressing trajectory. During the up-and-down movement of the clamping plate, uneven force can easily cause lateral shifts or tilting. This can not only cause the initially positioned BMS product to shift, further exacerbating the misalignment of the plug and socket, but may also concentrate the clamping force in a localized area of ​​the product, causing uneven force distribution and leading to localized dents in the outer shell or deformation of the interface.

[0004] To address these issues, we designed a BMS product testing fixture. Utility Model Content

[0005] The purpose of this invention is to provide a BMS product testing fixture to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides a BMS product testing fixture, which includes a housing assembly, a clamping assembly, a carrier plate assembly, and a propulsion assembly. The clamping assembly, the carrier plate assembly, and the propulsion assembly are all mounted on the housing assembly. The carrier plate assembly is located directly below the clamping assembly, and the propulsion assembly is located on one side of the carrier plate assembly, with the actuating end of the propulsion assembly facing the carrier plate assembly.

[0007] Furthermore, the housing assembly includes a housing body and a second mounting plate fixed to the top surface of the housing body; the second mounting plate has mounting holes, and a linear bearing is connected inside the mounting holes; the top surface of the second mounting plate is provided with a limiting post for positioning the product to be tested, a switch and a button are provided on the outside of the housing body, and a socket adapted to the propulsion assembly is provided at the corresponding position of the carrier plate assembly.

[0008] Furthermore, the clamping assembly includes a U-shaped bracket, the lower end of which is fixed to the mounting plate two of the housing assembly. The U-shaped bracket has fixing bosses on its left and right inner sides, and a valve mounting hole is opened on the U-shaped bracket. A valve body is fixedly connected to the valve mounting hole. A fixing plate one is connected to the top of the U-shaped bracket. A pressing cylinder is installed on the fixing plate one, and the piston rod of the pressing cylinder is connected to a connecting plate one. A guide sleeve two is connected to the connecting plate one, and a guide post two is slidably connected to the guide sleeve two. A clamping plate is connected to the other end of the guide post two. A spring one is also provided between the connecting plate one and the clamping plate. The spring one is sleeved on the guide post two and the guide sleeve two.

[0009] Furthermore, a buffer plate and a correction column are fixed on the bottom surface of the clamping plate; a mounting plate is connected to one side of the clamping plate, and a barcode scanner is connected to the mounting plate; a guide sleeve is also slidably provided on the clamping plate, and a guide column passes through the guide sleeve.

[0010] Furthermore, the carrier plate assembly includes a carrier plate body, the top surface of which is provided with a placement slot for placing the product to be tested, a positioning post for preliminary positioning, and a clearance slot and clearance hole for avoiding components; the carrier plate body is provided with a tension screw, the carrier plate body is connected to the mounting plate two through the tension screw, a guide post three is fixed below the carrier plate body, the lower end of the guide post three cooperates with a linear bearing one on the mounting plate two; a spring two is provided between the carrier plate body and the mounting plate two, the spring two is sleeved on the outside of the guide post three.

[0011] Furthermore, the positioning posts are symmetrically distributed on both sides of the placement groove; the clearance holes correspond to the correction posts of the clamping assembly.

[0012] Furthermore, the propulsion assembly includes a second fixing plate, which is fixed to a second mounting plate; a propulsion cylinder is mounted on the second fixing plate, and the telescopic end of the propulsion cylinder is connected to a second connecting plate; a third connecting plate is fixed on the second connecting plate, and a plug connector is fixed on the third connecting plate, with a plug body adapted to the socket of the carrier assembly mounted on the plug connector.

[0013] Furthermore, the propulsion assembly also includes a sliding mechanism, which is symmetrically arranged on the left and right sides of the propulsion cylinder. The sliding mechanism includes a fixed block, a fourth guide post, a sliding seat, and a second linear bearing. The fixed block is fixed on the second mounting plate, and the two ends of the fourth guide post are fixed between the fixed blocks. The second linear bearing is installed in the mounting hole of the sliding seat and is sleeved on the fourth guide post. The sliding seat is fixedly connected to the third connecting plate.

[0014] Furthermore, the scanning end of the barcode scanner faces the placement slot of the carrier assembly; the calibration post can be inserted into the calibration hole of the product under test, and cooperates with the limiting post of the housing assembly to align the socket of the product under test with the plug body of the push assembly.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The symmetrically distributed positioning posts on the carrier plate first complete the initial positioning of the product. When the clamping assembly moves down, the correction post is inserted into the product correction hole and works with the limit post to achieve positioning. At the same time, the guide sleeve one and the guide post one constrain the vertical movement of the clamping plate to avoid the docking deviation caused by the offset. The rubber buffer plate fits the product, and the spring one and spring two form a force balance, converting the rigid cylinder force into flexible elastic force, solving the problems of traditional pure rigid structure crushing the product and simple spring sheet positioning inaccurate.

[0017] 2. The pressing cylinder and the pushing cylinder respectively achieve automatic clamping and interface docking. The sliding mechanism ensures that the plug body is stably inserted into the socket through the four guide pillars and the two linear bearings, eliminating the need for manual plugging and unplugging and experience control, thus avoiding misjudgment and repeated testing caused by poor contact. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the overall external structure of this utility model;

[0019] Figure 2 This is an exploded view of the entire utility model;

[0020] Figure 3 This is an exploded view of the clamping assembly of this utility model;

[0021] Figure 4 This is an exploded view of the carrier plate assembly of this utility model;

[0022] Figure 5 This is an exploded view of the propulsion component of this utility model;

[0023] Figure 6 This is an exploded view of the sliding mechanism of this utility model;

[0024] Figure 7 This is an exploded view of the housing assembly in this utility model.

[0025] In the diagram: 1. Enclosure assembly; 101. Mounting plate two; 102. Linear bearing one; 103. Enclosure body; 104. Limiting post; 105. Switch; 106. Button; 107. Socket;

[0026] 2. Clamping assembly; 201. U-shaped bracket; 202. Fixing boss; 203. Air valve mounting hole; 204. Air valve body; 205. Fixing plate one; 206. Downward pressing cylinder; 207. Connecting plate one; 208. Clamping plate; 209. Spring one; 210. Correction column; 211. Buffer plate; 212. Barcode scanner; 213. Guide column two; 214. Guide sleeve two; 215. Mounting plate one; 216. Guide column one; 217. Guide sleeve one;

[0027] 3. Carrier plate assembly; 301. Carrier plate body; 302. Placement slot; 303. Positioning post; 304. Guide post three; 305. Spring two; 306. Tensioning screw; 307. Displacement groove; 308. Displacement hole;

[0028] 4. Propulsion assembly; 401. Fixing plate two; 402. Propulsion cylinder; 403. Connecting plate two; 404. Connecting plate three; 405. Plug connector; 406. Plug body;

[0029] 407. Sliding mechanism; 4071. Fixed block; 4072. Guide post four; 4073. Sliding seat; 4074. Linear bearing two. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-7 This utility model provides a technical solution: a BMS product testing fixture, including a housing assembly 1, a clamping assembly 2, a carrier plate assembly 3, and a pushing assembly 4; the clamping assembly 2, the carrier plate assembly 3, and the pushing assembly 4 are all installed on the housing assembly 1, the carrier plate assembly 3 is located directly below the clamping assembly 2, the pushing assembly 4 is located on one side of the carrier plate assembly 3, and the actuating end of the pushing assembly 4 is set towards the carrier plate assembly 3.

[0032] In practice, the housing assembly 1 serves as the carrier, the carrier plate assembly 3 carries the BMS product to be tested, the clamping assembly 2 applies pressure, and the pushing assembly 4 completes the interface docking.

[0033] See Figure 1-7 The housing assembly 1 includes a housing body 103 and a mounting plate 2 101 fixed to the top surface of the housing body 103; the mounting plate 2 101 has mounting holes, and a linear bearing 102 is connected in the mounting holes; the top surface of the mounting plate 2 101 is provided with a limiting post 104 for positioning the product to be tested; a switch 105 and a button 106 are provided on the outside of the housing body 103; and the carrier plate assembly 3 is provided with a socket 107 that is compatible with the propulsion assembly 4 at the corresponding position.

[0034] In practice, the housing body 103 provides support, the linear bearing 102 on the mounting plate 101 guides the lifting and lowering movement of the carrier assembly 3; the limiting post 104 constrains the product to be tested, preventing large-scale displacement when the product is placed; the switch 105 and button 106 replace manual operation; the preset socket 107 is aligned with the push assembly 4 to ensure stable interface connection.

[0035] See Figure 1-7 The clamping assembly 2 includes a U-shaped bracket 201. The lower end of the U-shaped bracket 201 is fixed to the mounting plate 101 of the housing assembly 1. The left and right inner sides of the U-shaped bracket 201 are provided with fixing bosses 202, and the U-shaped bracket 201 is provided with a valve mounting hole 203. A valve body 204 is fixedly connected to the valve mounting hole 203. The top of the U-shaped bracket 201 is connected to a fixing plate 205. A pressing cylinder 206 is installed on the fixing plate 205. The piston rod of the pressing cylinder 206 is connected to a connecting plate 207. A guide sleeve 214 is connected to the connecting plate 207. A guide post 213 is slidably connected to the guide sleeve 214. The other end of the guide post 213 is connected to a clamping plate 208. A spring 209 is also provided between the connecting plate 207 and the clamping plate 208. The spring 209 is sleeved on the guide post 213 and the guide sleeve 214.

[0036] In practice, the U-shaped bracket 201 fixes the pressing cylinder 206, and the valve body 204 controls the starting and stopping of the pressing cylinder 206; the connecting plate 207 and the pressing plate 208 are slidably engaged by the guide post 213 and the guide sleeve 214, and the spring 209 is sleeved on the outside of both. When the pressing cylinder 206 drives the connecting plate 207 to move down, the spring 209 converts the cylinder force into elastic force and transmits it to the pressing plate 208.

[0037] See Figure 1-7 A buffer plate 211 and a correction column 210 are fixed on the bottom surface of the clamping plate 208; a mounting plate 215 is connected to one side of the clamping plate 208, and a barcode scanner 212 is connected to the mounting plate 215; a guide sleeve 217 is also slidably provided on the clamping plate 208, and a guide column 216 is inserted inside the guide sleeve 217.

[0038] In practice, when the pressing plate 208 moves down, the correction post 210 on the bottom surface is inserted into the correction hole of the product to be tested, forming multiple positioning with the limiting post 104 of the box assembly 1; at the same time, the sliding cooperation between the guide post 216 and the guide sleeve 217 further constrains the movement of the pressing plate 208, and the buffer plate 211 directly contacts the top surface of the product, further dispersing the pressing force through deformation; the barcode scanner 212 simultaneously scans the barcode information of the product in the placement slot 302.

[0039] See Figure 1-7The carrier plate assembly 3 includes a carrier plate body 301. The top surface of the carrier plate body 301 is provided with a placement groove 302 for placing the product to be tested, a positioning post 303 for preliminary positioning, and a clearance groove 307 and a clearance hole 308 for avoiding components. A tension screw 306 is provided on the carrier plate body 301, and the carrier plate body 301 is connected to the mounting plate 2 101 through the tension screw 306. A guide post 304 is fixed below the carrier plate body 301, and the lower end of the guide post 304 cooperates with the linear bearing 102 on the mounting plate 2 101. A spring 2 305 is provided between the carrier plate body 301 and the mounting plate 2 101, and the spring 2 305 is sleeved on the outside of the guide post 304.

[0040] In practice, after the product to be tested is placed in the placement slot 302 of the carrier plate body 301, the positioning post 303 achieves positioning; the guide post 304 slides with the linear bearing 102 on the mounting plate 2 101. When the clamping assembly 2 is pressed down, the carrier plate body 301 can move slightly downward along the guide post 304, the spring 2 305 is compressed and generates a reverse elastic force, which balances the pressure of the clamping assembly 2; the tension screw 306 ensures that the guide post 304 and the carrier plate body 301 are stably connected.

[0041] See Figure 1-7 The positioning posts 303 are symmetrically distributed on both sides of the placement groove 302; the clearance holes 308 correspond to the correction posts 210 of the clamping assembly 2.

[0042] In practice, the positioning posts 303 are symmetrically distributed on both sides of the placement groove 302 to ensure that the product is subjected to balanced force; the clearance groove 307 provides movement space for the execution end of the propulsion component 4 to avoid interference with the carrier plate during docking; the clearance hole 308 corresponds to the correction post 210 of the pressing component 2 to ensure that the correction post 210 is inserted into the product correction hole.

[0043] See Figure 1-7 The propulsion assembly 4 includes a second fixing plate 401, which is fixed to the second mounting plate 101. A propulsion cylinder 402 is mounted on the second fixing plate 401, and the telescopic end of the propulsion cylinder 402 is connected to a second connecting plate 403. A third connecting plate 404 is fixed on the second connecting plate 403, and a plug connector 405 is fixed on the third connecting plate 404. A plug body 406 adapted to the socket 107 of the carrier assembly 3 is mounted on the plug connector 405.

[0044] In specific implementation, the fixed plate 2 401 fixes the push cylinder 402. The cylinder extension end drives the plug connector 405 to move through the connecting plate 2 403 and the connecting plate 3 404, so that the plug body 406 is inserted into the socket 107 of the carrier plate assembly 3 in the horizontal direction, and the push cylinder 402 provides thrust.

[0045] See Figure 1-7The propulsion assembly 4 also includes a sliding mechanism 407, which is symmetrically arranged on the left and right sides of the propulsion cylinder 402. The sliding mechanism 407 includes a fixing block 4071, a guide post 4072, a sliding seat 4073, and a linear bearing 4074. The fixing block 4071 is fixed on the mounting plate 101, and the two ends of the guide post 4072 are fixed between the fixing blocks 4071. The linear bearing 4074 is installed in the mounting hole of the sliding seat 4073 and is sleeved on the guide post 4072. The sliding seat 4073 is fixedly connected to the connecting plate 404.

[0046] In specific implementation, in the sliding mechanism 407 on both sides of the propulsion cylinder 402, the guide post 4072 forms a guide track through the fixed block 4071, and the sliding seat 4073 slides along the guide post 4072 through the linear bearing 4074. The sliding seat 4073 is fixed to the connecting plate 404, which drives the plug body 406 to move along the track.

[0047] See Figure 1-7 The pressing cylinder 206 is controlled to start and stop by the air valve body 204. When the pressing cylinder 206 drives the connecting plate 207 to move down, the spring 209 can drive the pressing plate 208 to move down synchronously through the elastic force, and make the buffer plate 211 fit against the top surface of the product to be tested.

[0048] In practice, the valve body 204 controls the start, stop, and stroke of the pressing cylinder 206. When the cylinder drives the connecting plate 207 to move downward, the spring 209 first drives the pressing plate 208 to contact the product through its elastic force. If the cylinder continues to move downward, the spring 209 is compressed, and the elastic force increases linearly with the amount of compression until the preset pressing force is reached. During this process, the spring 209 buffers and transmits the force.

[0049] See Figure 1-7 The scanning end of the barcode scanner 212 faces the placement slot 302 of the carrier plate assembly 3; the calibration post 210 can be inserted into the calibration hole of the product under test, and cooperate with the limiting post 104 of the housing assembly 1 to align the socket 107 of the product under test with the plug body 406 of the push assembly 4.

[0050] In practice, when the clamping plate 208 moves down, the calibration column 210 is inserted into the product calibration hole to ensure that the socket 107 is aligned with the plug body 406; at the same time, the barcode scanner 212 automatically scans the product barcode and binds the test data with the product identity information.

[0051] Working principle: The BMS product to be tested is placed in the placement slot 302 of the carrier body 301 of the carrier assembly 3. The positioning posts 303 symmetrically distributed on the carrier body 301 complete the initial positioning of the product. At the same time, the clearance slots 307 and clearance holes 308 of the carrier body 301 reserve space for the execution end of the push assembly 4 and the correction post 210 of the clamping assembly 2, respectively, to avoid interference between components.

[0052] Press the button 106 on the outside of the housing body 103 of the housing assembly 1 to start the test. In the clamping assembly 2, the air valve body 204 on the U-shaped bracket 201 controls the downward cylinder 206 to start. Its piston rod drives the connecting plate 207 to move down. The connecting plate 207 drives the clamping plate 208 to move down synchronously through the guide sleeve 214 and the guide post 213. During the downward movement, the correction post 210 on the bottom surface of the clamping plate 208 first inserts into the product correction hole, and works with the limit post 104 on the mounting plate 101 to complete the precise positioning of the product, ensuring that the product socket 107 is aligned with the plug body 406 of the push assembly 4. At the same time, the sliding cooperation between the guide sleeve 217 and the guide post 216 on the clamping plate 208 restricts the movement of the clamping plate 208 in the vertical direction to avoid deviation.

[0053] As the pressure plate 208 continues to move downward, the rubber buffer plate 211 on the bottom surface of the pressure plate 208 adheres to the top surface of the product. As the connecting plate 207 moves further downward, the spring 209 between the connecting plate 207 and the pressure plate 208 is compressed, converting the rigid cylinder force into a flexible elastic force. At the same time, the carrier plate body 301 moves slightly downward along the guide post 304, compressing the spring 305. The spring 209 and the spring 305 form a force balance, thereby pressing the product and preventing damage.

[0054] Subsequently, the propulsion component 4 is activated, and the propulsion cylinder 402 on the fixed plate 2 401 drives the connecting plate 2 403 and the connecting plate 3 404 to move. The connecting plate 3 404 drives the sliding seat 4073 to slide along the guide post 4072, which simultaneously drives the plug body 406 on the plug connector 405 to be horizontally inserted into the product socket 107. At the same time, the barcode scanner 212 on the mounting plate 1 215 on one side of the clamping plate 208 scans the product barcode, binds the test data with the product information, and completes the test.

Claims

1. A BMS product testing fixture, characterized in that, It includes a housing assembly (1), a clamping assembly (2), a carrier plate assembly (3), and a propulsion assembly (4); the clamping assembly (2), the carrier plate assembly (3), and the propulsion assembly (4) are all installed on the housing assembly (1), the carrier plate assembly (3) is located directly below the clamping assembly (2), the propulsion assembly (4) is located on one side of the carrier plate assembly (3), and the actuating end of the propulsion assembly (4) is set towards the carrier plate assembly (3).

2. The BMS product testing fixture as described in claim 1, characterized in that: The housing assembly (1) includes a housing body (103) and a mounting plate two (101) fixed to the top surface of the housing body (103); the mounting plate two (101) has a mounting hole, and a linear bearing one (102) is connected in the mounting hole; the top surface of the mounting plate two (101) is provided with a limiting post (104) for positioning the product to be tested; a switch (105) and a button (106) are provided on the outside of the housing body (103); and the carrier plate assembly (3) is provided with a socket (107) adapted to the propulsion assembly (4) at the corresponding position.

3. The BMS product testing fixture as described in claim 1, characterized in that: The clamping assembly (2) includes a U-shaped bracket (201), the lower end of which is fixed to the mounting plate two (101) of the housing assembly (1). The U-shaped bracket (201) has fixing bosses (202) on its left and right inner sides, and a valve mounting hole (203) is opened on the U-shaped bracket (201). A valve body (204) is fixedly connected to the valve mounting hole (203). A fixing plate one (205) is connected to the top of the U-shaped bracket (201), and a pressing device is installed on the fixing plate one (205). The piston rod of the cylinder (206) is connected to a connecting plate (207); a guide sleeve (214) is connected to the connecting plate (207), a guide post (213) is slidably connected to the guide sleeve (214), and a pressing plate (208) is connected to the other end of the guide post (213); a spring (209) is also provided between the connecting plate (207) and the pressing plate (208), and the spring (209) is sleeved on the guide post (213) and the guide sleeve (214).

4. The BMS product testing fixture as described in claim 3, characterized in that: The bottom surface of the clamping plate (208) is fixed with a buffer plate (211) and a correction column (210); a mounting plate (215) is connected to one side of the clamping plate (208), and a barcode scanner (212) is connected to the mounting plate (215); a guide sleeve (217) is also slidably provided on the clamping plate (208), and a guide column (216) is inserted inside the guide sleeve (217).

5. The BMS product testing fixture as described in claim 1, characterized in that: The carrier plate assembly (3) includes a carrier plate body (301). The top surface of the carrier plate body (301) is provided with a placement slot (302) for placing the product to be tested, a positioning post (303) for preliminary positioning, and a clearance slot (307) and clearance hole (308) for avoiding components. A tension screw (306) is provided on the carrier plate body (301). The carrier plate body (301) is connected to the mounting plate two (101) through the tension screw (306). A guide post three (304) is fixed below the carrier plate body (301). The lower end of the guide post three (304) cooperates with the linear bearing one (102) on the mounting plate two (101). A spring two (305) is provided between the carrier plate body (301) and the mounting plate two (101). The spring two (305) is sleeved on the outside of the guide post three (304).

6. The BMS product testing fixture as described in claim 5, characterized in that: The positioning posts (303) are symmetrically distributed on both sides of the placement groove (302); the clearance holes (308) correspond to the correction posts (210) of the clamping assembly (2).

7. The BMS product testing fixture as described in claim 1, characterized in that: The propulsion assembly (4) includes a second fixing plate (401), which is fixed to a second mounting plate (101); a propulsion cylinder (402) is mounted on the second fixing plate (401), and the telescopic end of the propulsion cylinder (402) is connected to a second connecting plate (403); a third connecting plate (404) is fixed on the second connecting plate (403), and a plug connector (405) is fixed on the third connecting plate (404), and a plug body (406) adapted to the socket (107) of the carrier assembly (3) is mounted on the plug connector (405).

8. The BMS product testing fixture as described in claim 7, characterized in that: The propulsion assembly (4) further includes a sliding mechanism (407), which is symmetrically arranged on the left and right sides of the propulsion cylinder (402). The sliding mechanism (407) includes a fixing block (4071), a guide post four (4072), a sliding seat (4073), and a linear bearing two (4074). The fixing block (4071) is fixed on the mounting plate two (101), and the two ends of the guide post four (4072) are fixed between the fixing blocks (4071). The linear bearing two (4074) is installed in the mounting hole of the sliding seat (4073), and the linear bearing two (4074) is sleeved on the guide post four (4072). The sliding seat (4073) is fixedly connected to the connecting plate three (404).

9. The BMS product testing fixture as described in claim 4, characterized in that: The scanning end of the barcode scanner (212) faces the placement slot (302) of the carrier plate assembly (3); the calibration post (210) can be inserted into the calibration hole of the product under test, and cooperate with the limiting post (104) of the housing assembly (1) to align the socket (107) of the product under test with the plug body (406) of the push assembly (4).

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