Pressing and limiting device for detecting fuel injector

Abstract

The invention discloses a pressing and limiting device for fuel injector detection, and relates to the technical field of fuel injector detection. The pressing and limiting device comprises two groups of limiting parts which move in a staggered manner; and the linkage part is used for linking the two groups of limiting parts. According to the pressing and limiting device for detecting the oil sprayer, the external gear and the synchronous gear which are connected with each other are adopted as linkage components to associate the two limiting pin columns together, and the two limiting pin columns extend in the conveying direction of the air cylinder and the direction perpendicular to the conveying belt respectively; according to the oil sprayer detection device, the vertically-arranged limiting pin column can be driven to press down the cylinder cover while the horizontally-arranged limiting pin column is pushed to move, and therefore the technical problems that when an existing oil sprayer detection device is used, fixing of the cylinder cover is tedious, and position deviation is prone to occurring are effectively solved; and therefore, the cylinder cover is pressed while the cylinder cover is limited, so that the fixing stability of the cylinder cover is met.

Description

Technical Field

[0001] This invention relates to the field of fuel injector testing technology, and in particular to a clamping and limiting device for fuel injector testing. Background Technology

[0002] The procedure for inspecting the protrusion height of the S04 / F30 injector on the assembly line is quite cumbersome. The operator must first erect the cylinder head, add a copper washer to assemble the injector, and then use a dial indicator to check the protrusion height. After the inspection, the injector must be removed from the cylinder head.

[0003] A Chinese patent application with patent number CN202122145912.6 discloses an auxiliary device for detecting the protrusion height of a fuel injector. The device includes a fuel injector body and a base. A height-adjustable connecting column is mounted on the base, and a mounting plate is fixed to the connecting column. A height detection device is mounted on the mounting plate. A limit plate is slidably mounted on the side of the mounting plate, and a protective sleeve is connected to the limit plate. The protective sleeve is fitted onto the fuel injector body and has an inner cavity containing a moisture-proof component. The protective sleeve has multiple vent holes that communicate with the inner cavity. While this device can detect the protrusion height of the fuel injector, it requires the cylinder to be stationary during detection, making it unsuitable for assembly line production testing. This necessitates repeatedly moving the cylinder head to the designated location for testing.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were discovered:

[0005] The current injector testing equipment is cumbersome and prone to positional deviations: Existing injector testing devices mainly fall into two categories. One is an independent testing unit, where a separate testing station is set up. The cylinder head to be tested is transported to the corresponding station for testing, and after testing, a transport device moves the cylinder head onto a conveyor belt. This method severely impacts engine production efficiency and increases the risk of damage and collision due to the need for the cylinder head to move back and forth. The other method involves setting up a testing station on a conveyor belt. While this method can reduce handling by adapting to the conveyor belt, a new problem arises: the cylinder head needs to remain stationary during testing so that the testing device can inspect each injector. However, since the cylinder head moves along the conveyor belt, it cannot be stopped. Therefore, it is necessary to control the conveyor belt to stop or install a blocking structure to prevent the cylinder head from moving. However, both methods are prone to deviations, as detailed below:

[0006] This is achieved by controlling the conveyor belt to stop moving. This requires the motor used to control the conveyor belt to repeatedly start and stop, which is not only prone to damage, but also prevents the cylinder heads on the same conveyor belt from moving, thus affecting subsequent processes. In addition, the cylinder heads are heavy, and during the start and stop process, the motor is affected by inertia, and the resistance to start and stop will be very large, further affecting the service life of the motor.

[0007] By setting a blocking structure under the conveyor belt, when the cylinder head to be tested moves to the designated position, the blocking structure is controlled to rise and block the transport of the cylinder head, thereby stopping the cylinder head from moving, so that the testing station can test the injectors on the cylinder head. However, due to the large mass of the cylinder head, when the cylinder head hits the blocking structure, it is not only easy to damage the cylinder head, but also the cylinder head will be displaced under the action of the rebound force. To this end, we propose a clamping and limiting device for injector testing. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] To address the shortcomings of existing technologies, this invention provides a clamping and limiting device for injector testing, which solves the technical problem that the cylinder head fixing of existing injector testing devices is cumbersome and prone to positional deviation during use.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0012] A clamping and limiting device for injector testing is installed on both sides of a conveyor belt to clamp and limit the cylinder head being transported on the conveyor belt. The clamping and limiting device includes:

[0013] Two sets of interleaved limiting components, one set of limiting components is set horizontally and the other set vertically;

[0014] A linkage component is disposed between two sets of limiting components to link the two sets of limiting components.

[0015] Both sets of limiting components are connected to the linkage components; when the cylinder head pushes the horizontally set limiting components to move, it can drive the vertically set limiting components to press down towards the top of the cylinder head.

[0016] Preferably, the horizontally positioned limiting component can move along the transport direction of the cylinder head; the vertically positioned limiting component can move along a direction perpendicular to the conveyor belt; wherein, the limiting component includes a toothed belt, and the end of the toothed belt is connected to a limiting pin, and the limiting pin is connected to the linkage component through the toothed belt.

[0017] Preferably, the linkage component includes an external gear and a synchronizing gear that mesh with each other, and respectively engage with the toothed belts of the two limiting components;

[0018] The outer diameter of the synchronizing gear is smaller than that of the outer gear, and the outer gear is connected to a horizontally positioned limiting component, while the synchronizing gear is connected to a vertically positioned limiting component.

[0019] Preferably, the outer wall of the conveyor belt is provided with a support plate, and the top of the support plate is provided with a bearing box. The support plate is provided with a driver, and the driver drives the bearing box to slide towards the position of the conveyor belt.

[0020] The limiting component and the linkage component are both installed in the carrier box. When the carrier box moves to the side of the support plate close to the conveyor belt, the limiting pins on the two limiting components are located above the conveyor belt.

[0021] Preferably, the driver includes a self-locking motor, which is connected to a connecting rod at the bottom of the support plate. Both ends of the connecting rod are connected to a linkage gear, and the linkage gear meshes with a positioning rack at the bottom of the bearing box. When the self-locking motor drives the linkage gear to rotate, it can drive the bearing box to slide.

[0022] The carrier box and the support plate are connected by a slide rail.

[0023] Preferably, each of the external gear and the synchronous gear is provided with a positioning post at the ends that are far apart from each other, and a torsion spring is sleeved on the outside of the positioning post. The positioning post is connected to the inner wall of the bearing box through the torsion spring.

[0024] When the linkage component rotates, the torsion spring on the linkage component begins to store force.

[0025] Preferably, the horizontally positioned limiting component corresponds to the sliding groove on the outside of the carrier box, and the limiting pin on the limiting component extends through the sliding groove to the outside of the carrier box;

[0026] The vertically positioned limiting component corresponds to the opening at the top of the carrier box, and the toothed strip on the limiting component extends through the opening to the top of the carrier box, with the limiting pin positioned at that end.

[0027] Preferably, a sliding member is provided at the end of the limiting pin away from the toothed belt, and the sliding member is located on the side of the limiting pin close to the cylinder head. The sliding member includes a mounting seat, and the front end of the mounting seat is provided with two sets of corresponding rotating shafts. The outer walls of the two rotating shafts are fitted with sliding belts.

[0028] The limiting pin is attached to the cylinder head via a sliding band; when the driver moves the rotating shaft, the sliding band rolls along the outside of the cylinder head.

[0029] (III) Beneficial Effects

[0030] 1. By using interconnected external gears and synchronous gears as linkage components to connect the two limiting pins, and then setting a toothed belt on each of the two limiting pins, with the two toothed belts extending along the cylinder transport direction and perpendicular to the conveyor belt respectively, the horizontally set limiting pins are located on the movement path of the cylinder head. This allows the cylinder head to push the horizontally set limiting pins to move when it moves, and at the same time, under the action of the linkage components, it drives the vertically set limiting pins to move downward, thereby satisfying the "limiting" and "pressing" requirements of injector testing. Therefore, it effectively solves the technical problem that the cylinder head fixing is cumbersome and prone to positional deviation when using existing injector testing devices. It achieves "limiting" and "pressing" the cylinder head at the same time to meet the stability of the cylinder head fixing, and can slowly move the cylinder head to improve the stability of the fixed position.

[0031] 2. By installing a motor on the support plate, and having the motor drive the bearing box to move horizontally via a gear set, the horizontally positioned limit pin is controlled to move outward after the test is completed, moving away from the cylinder head's movement path. This allows for free adjustment of the cylinder head's fixation and release, improving the device's applicability. Secondly, a rolling sliding component is installed at the end of the limit pin, which reduces the friction between the limit pin and the cylinder head during the outward movement of the limit pin box. This prevents damage to the cylinder head surface caused by the friction between the limit pin and the cylinder head, and also reduces the difficulty of moving the limit pin, thereby improving overall safety. Attached Figure Description

[0032] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] Figure 1 This is one of the overall structural diagrams of an embodiment of the present invention;

[0034] Figure 2 This is the second overall structural diagram of an embodiment of the present invention;

[0035] Figure 3 This is the third overall structural diagram of an embodiment of the present invention;

[0036] Figure 4 This is the fourth overall structural diagram of an embodiment of the present invention;

[0037] Figure 5 This is an overall structural diagram of the clamping and limiting device in an embodiment of the present invention;

[0038] Figure 6 This is an exploded structural diagram of the clamping and limiting device in an embodiment of the present invention;

[0039] Figure 7 This is a structural diagram of the carrier box in an embodiment of the present invention;

[0040] Figure 8 This is an exploded structural diagram of the carrier box in an embodiment of the present invention;

[0041] Figure 9 This is a diagram showing the docking structure of the limiting component and the linkage component in an embodiment of the present invention;

[0042] Figure 10 This is an exploded structural diagram of the linkage component in an embodiment of the present invention;

[0043] Figure 11 This is a structural diagram of the limiting component and the linkage component after connection in an embodiment of the present invention;

[0044] Figure 12 This is a diagram showing the connection structure between the sliding member and the limiting pin in an embodiment of the present invention;

[0045] Figure 13 This is a diagram showing the docking structure between the driver and the carrier box in an embodiment of the present invention;

[0046] Figure 14 This is a structural diagram of the driver in an embodiment of the present invention;

[0047] Figure 15 This is a schematic diagram illustrating an embodiment of the present invention;

[0048] Figure 16 This is a diagram showing the docking structure between the cylinder head and the fuel injector in an embodiment of the present invention.

[0049] Legend:

[0050] 1. Conveyor belt;

[0051] 2. Cylinder head;

[0052] 31. Support plate; 32. Load-bearing box; 33. Positioning rack; 34. Driving component; 341. Self-locking motor; 342. Drive gear; 343. Driven gear; 344. Connecting rod; 345. Linking gear; 351. External gear; 352. Synchronizing gear; 353. Positioning pin; 354. Torsion spring; 355. Retaining ring; 356. Extension toothed belt; 357. Lifting toothed belt; 358. Limiting pin; 36. Slide rail; 37. Vertical plate;

[0053] 4. Sliding component; 41. Mounting base; 42. Rotating shaft; 43. Sliding belt. Detailed Implementation

[0054] This application provides a clamping and limiting device for injector testing, effectively solving the technical problem that existing injector testing devices are cumbersome to fix and prone to positional deviations when in use. In existing injector testing devices, two limiting pins are connected by interconnected external gears and synchronous gears as linkage components. Then, a toothed belt is set on each of the two limiting pins, and the two toothed belts extend along the cylinder transport direction and perpendicular to the conveyor belt, respectively. The horizontally set limiting pins are located on the movement path of the cylinder head, so that the cylinder head can push the horizontally set limiting pins to move when it moves. At the same time, under the action of the linkage components, the vertically set limiting pins are driven to move downward, thereby satisfying the "limiting" and "clamping" required for injector testing. Thus, the cylinder head is "limited" and "clamped" at the same time, so as to meet the stability of the cylinder head fixing and can be slowly moved to improve the stability of the fixed position.

[0055] Example 1

[0056] The technical solution in this application embodiment effectively solves the technical problem that the cylinder head fixing of existing injector detection devices is cumbersome and prone to positional deviation during use. The overall idea is as follows:

[0057] To address the problems existing in the prior art, this invention provides a clamping and limiting device for injector detection, which is installed on both sides of a conveyor belt 1 to clamp and limit the cylinder head 2 transported on the conveyor belt 1. This clamping and limiting device mainly consists of a limiting structure for limiting the cylinder head 2 and a driver that can drive the limiting structure to translate. The limiting structure can utilize the power generated by the conveyor belt 1 during the transport of the cylinder head 2 as its power source, thus eliminating the need for an additional power source and reducing the use of wiring and power equipment. It is mainly composed of two mutually movable limiting pins 358. The cylinder head 2 is linked by gears, so that when one limit pin 358 moves, it can drive the other limit pin 358 to move synchronously. This ensures that "limiting" and "clamping" are synchronized beforehand. Therefore, the force of the cylinder head 2's movement can be converted into the force of the limit pins 358. To allow the cylinder head 2 to be released and moved normally after inspection, a driver is installed on one side of the conveyor belt 1. This driver moves the limit pins 358 outwards, preventing resistance and allowing the cylinder head 2 to move normally. The specific structure is as follows:

[0058] The limiting structure consists of two actions: "limiting" and "pressing". In order to link the two actions together, a gear set is set between "limiting" and "pressing". This gear set can connect the two actions together and enable them to work together. Therefore, we provide a feasible solution.

[0059] Set up an external gear 351 and a synchronizing gear 352 that mesh with each other (the outer diameter of the synchronizing gear 352 is larger than the outer diameter of the external gear 351), such as Figure 10 As shown, the synchronizing gear 352 is located at the front end of the external gear 351 and is coaxially connected to the external gear 351. A horizontally extending toothed belt 356 is then provided on the edge of the external gear 351; and a vertically extending lifting toothed belt 357 is provided on the edge of the synchronizing gear 352, as shown. Figure 9 As shown, when the extension toothed belt 356 moves, it can drive the external gear 351 that meshes with it to rotate. Since the external gear 351 is connected to the synchronous gear 352, and the synchronous gear 352 is connected to the vertically arranged lifting toothed belt 357, when the extension toothed belt 356 moves horizontally, it can drive the lifting toothed belt 357 to move up and down, thereby forming a synchronous motion state.

[0060] In order to "limit" and "press" the cylinder head 2 on the conveyor belt 1, it is necessary to contact the cylinder head 2. Therefore, we install a limiting pin 358 on both the extending toothed belt 356 and the lifting toothed belt 357, with the head of the limiting pin 358 facing the conveyor belt 1. This allows for the "limiting" and "pressing" operation of the cylinder head 2. Furthermore, to utilize the force generated when the cylinder head 2 moves, it needs to be correlated with the movement state of the cylinder head 2. Therefore, we place the limiting pin 358 connected to the extending toothed belt 356 along the transport path of the cylinder head 2. Figure 2 As shown, during the movement of the cylinder head 2, the edge of the cylinder head 2 first contacts the limiting pin 358 at the end of the extended toothed belt 356, and as the cylinder head 2 continues to move with the conveyor belt 1, it pushes the limiting pin 358, causing the extended toothed belt 356 connected to it to move forward, as shown. Figure 3As shown, as the extended toothed belt 356 moves forward, it drives the external gear 351 meshing with it to rotate. Since the external gear 351 is connected to the synchronous gear 352, and the synchronous gear 352 meshes with the vertically positioned lifting toothed belt 357, when the extended toothed belt 356 moves horizontally, it can drive the lifting toothed belt 357 to move downward. Then, the limiting pin 358 connected to its end moves towards the cylinder head 2 on the conveyor belt 1 until the limiting pin 358 covers the top of the cylinder head 2. At this time, the lifting toothed belt 357 can no longer move up or down, thus locking the lifting toothed belt 357 and preventing the extended toothed belt 356 connected with it from moving. Thus, the "limiting" and "pressing" actions are completed simultaneously.

[0061] In order to allow the cylinder head 2 to be released and moved normally after inspection, a driver is installed on one side of the conveyor belt 1. However, to support and load the limiting structure and the driver, a corresponding fixing structure is also installed. Details are as follows:

[0062] A notch is made in the guardrail at the edge of conveyor belt 1. A rectangular support plate 31 is then installed into the notch. A carrier box 32, which slides along a slide rail 36, is then installed on top of this notch. This carrier box 32 supports the limiting structure, such as... Figure 7 and Figure 8 As shown, the limiting structure is installed in the carrier box 32 (the two ends of the external gear 351 and the synchronous gear 352 are each connected to the inner wall of the carrier box 32 through a bearing). To facilitate the extension toothed belt 356 and the lifting toothed belt 357 extending out of the carrier box 32, a groove is opened on the side of the carrier box 32 facing the conveyor belt 1, and the limiting pin 358 connected to the extension toothed belt 356 extends through the groove to the outside of the carrier box 32. Figure 7 As shown, the sliding distance of the extension toothed belt 356 can be limited by the insertion relationship between the limiting pin 358 and the slide groove.

[0063] For the lifting toothed belt 357, an opening is made at the top of the carrier box 32, so that the lifting toothed belt 357 can extend through the opening to the top of the carrier box 32, and the limiting pin 358 is set on this end, such as... Figure 7 As shown.

[0064] The driver (i.e., the drive unit 34) is mounted on the support plate 31 and drives the carrier box 32 to slide towards the position of the conveyor belt 1. When the carrier box 32 moves to the side of the support plate 31 closer to the conveyor belt 1, the limiting pins 358 on both toothed belts are above the conveyor belt 1. In this state, the cylinder head 2 transported along the conveyor belt 1 will contact the limiting pins 358. Conversely, when the carrier box 32 moves to the side of the support plate 31 away from the conveyor belt 1, the limiting pins 358 on both toothed belts are not above the conveyor belt 1. In this state, the cylinder head 2 transported along the conveyor belt 1 will not contact the limiting pins 358. Figure 1 As shown. The specific structure of the driver is as follows:

[0065] It mainly consists of a self-locking motor 341 and two connecting gears 345 connected to the support plate 31. The self-locking motor 341 is mounted on the vertical plate 37 at the bottom of the support plate 31. A drive gear 342 is mounted on the output shaft of the self-locking motor 341 and meshes with a driven gear 343 outside the connecting rod 344. The two connecting gears 345 are respectively connected to both ends of the connecting rod 344. This allows the two connecting gears 345 to rotate when the self-locking motor 341 drives the connecting rod 344 to rotate. Figure 14 As shown, in order to enable the carrier box 32 equipped with the limiting structure to move horizontally, a positioning rack 33 that meshes with the connecting gear 345 is provided at the bottom of the carrier box 32. This allows the carrier box 32 to slide when the self-locking motor 341 drives the connecting gear 345 to rotate. Figure 1 and Figure 2 As shown, this drives the mechanism; connecting rod 344 is connected to the bottom of support plate 31 via bearing seat; and the slider on slide rail 36 is connected to the bottom of carrier box 32, with the extension direction of slide rail 36 consistent with the rotation direction of linkage gear 345, as shown. Figure 14 As shown, a baffle is provided at each end of the slide rail 36 to limit the movement range of the carrier box 32 and prevent it from falling off the support plate 31.

[0066] To enable reuse, we investigated two approaches. The first, and simplest, involves placing a return spring at the end of the extending toothed belt 356 furthest from the limiting pin 358. The other end of the return spring is connected to the inner wall of the bearing box 32, and the return spring is always in a stretched state. Thus, when the extending toothed belt 356 is not pushed by the cylinder head 2, it will move towards the external gear 351 under the pull of the return spring until the limiting pin 358 on the extending toothed belt 356 contacts the end of the groove. At this point, the extending toothed belt 356 can no longer move and completes the reset. The structure mainly disclosed in this application is the second approach, which involves placing a return spring at each end of the external gear 351 and the synchronous gear 352 furthest from each other. A positioning post 353 is provided, and a torsion spring 354 is sleeved on the outside of the positioning post 353. The torsion spring 354 is connected to the inner wall of the bearing box 32. A retaining ring 355 is sleeved on the positioning post 353 to limit the torsion spring 354. When the linkage component rotates, the torsion spring 354 on the linkage component begins to store force. Until the extension toothed belt 356 is not pushed by the cylinder head 2, it drives the external gear 351 and the synchronous gear 352 to rotate in the opposite direction. At this time, the extension toothed belt 356 and the lifting toothed belt 357 that mesh with them will move in the opposite direction to the previous movement direction until the limiting pin 358 on the extension toothed belt 356 contacts the end of the slide groove. At this time, the extension toothed belt 356 can no longer move and completes the reset.

[0067] In the specific implementation process, the first step is to control the self-locking motor 341 to drive the connecting gear 345 to rotate. Since the connecting gear 345 meshes with the positioning rack 33 at the bottom of the carrying box 32, when the self-locking motor 341 drives the connecting gear 345 to rotate, it can synchronously drive the carrying box 32, which is equipped with the limit structure, to slide together in the direction of the conveyor belt 1. Figure 1 and Figure 2 As shown, until the carrier box 32 moves to the side of the support plate 31 close to the conveyor belt 1, at this time, the limiting pins 358 on both toothed belts are located above the conveyor belt 1. In this state, the cylinder head 2 transported along the conveyor belt 1 will come into contact with the limiting pins 358.

[0068] The second step, as Figure 2 As shown, during the movement of the cylinder head 2, the edge of the cylinder head 2 first contacts the limiting pin 358 at the end of the extended toothed belt 356, and as the cylinder head 2 continues to move with the conveyor belt 1, it pushes the limiting pin 358, causing the extended toothed belt 356 connected to it to move forward, as shown. Figure 3As shown, as the extended toothed belt 356 moves forward, it drives the external gear 351 meshing with it to rotate. Since the external gear 351 is connected to the synchronous gear 352, and the synchronous gear 352 is connected to the vertically positioned lifting toothed belt 357, when the extended toothed belt 356 moves horizontally, it can drive the lifting toothed belt 357 to move downward. The limiting pin 358 connected to the starting end then moves towards the cylinder head 2 on the conveyor belt 1 until the limiting pin 358 covers the top of the cylinder head 2. At this point, the lifting toothed belt 357 can no longer move up or down, thus locking the lifting toothed belt 357 and preventing the extended toothed belt 356 connected to it from moving. This simultaneously completes the "limiting" and "pressing" actions. Figure 4 The state shown.

[0069] Thirdly, after the test is completed, the self-locking motor 341 drives the connecting gear 345 to rotate in the opposite direction. This causes the carrying box 32 to move to the side of the support plate 31 away from the conveyor belt 1. In this state, the limiting pins 358 on the two toothed belts will not be above the conveyor belt 1. Therefore, the cylinder head 2 transported along the conveyor belt 1 will not contact the limiting pins 358. Figure 1 As shown, since both the external gear 351 and the synchronous gear 352 are connected to the inner wall of the bearing box 32 through the torsion spring 354, the torsion spring 354 on the linkage component begins to store force when the linkage component rotates. Until the extension toothed belt 356 is not pushed by the cylinder head 2, it drives the external gear 351 and the synchronous gear 352 to rotate in the opposite direction. At this time, the extension toothed belt 356 and the lifting toothed belt 357 that mesh with the two will move in the opposite direction to the previous movement until the limiting pin 358 on the extension toothed belt 356 contacts the end of the slide groove. At this time, the extension toothed belt 356 can no longer move to complete the reset.

[0070] In addition, such as Figures 1 to 4 as well as Figure 15 As shown, the cylinder head 2 is transported mainly by the rollers on the conveyor belt 1. The rollers are connected to the motor and roll under the action of the motor, which drives the cylinder head 2, which is in contact with its top, to move forward. The reason for this transportation method is to reduce the friction of the cylinder head 2 in the fixed state (i.e., the friction between the conveyor belt 1 and the cylinder head 2). The thrust generated by the rollers can meet the needs of transporting the cylinder head 2.

[0071] Example 2

[0072] Based on Example 1, this application provides a structure that can reduce the friction between the limiting pin and the cylinder head. The overall concept is as follows:

[0073] To reduce the friction between the limiting pin 358 and the cylinder head 2, it is necessary to understand why friction occurs and what type of friction it is. Friction occurs because when the self-locking motor 341 drives the carrier box 32 to move towards the support plate 31 away from the conveyor belt 1, the resulting friction is surface-to-surface contact friction. To reduce this surface-to-surface contact friction, we use a rolling mechanism. Therefore, we install a sliding member 4 at the end of the limiting pin 358 away from the toothed belt, with the sliding member 4 located on the side of the limiting pin 358 closest to the cylinder head 2. This allows it to preferentially contact the outer wall of the cylinder head 2, thus replacing the limiting pin 358 in contact with the cylinder head 2. The sliding member 4 mainly consists of a mounting base 41 and a sliding belt 43 located on it. The front end of the mounting base 41 has two cylindrical rotating shafts 42, and the sliding belt 43 is fitted onto the two rotating shafts 42, thus forming a structure similar to a "conveyor belt." Figure 12 As shown, the sliding belt 43 rolls in the same direction as the bearing box 32 slides back and forth. Therefore, when the driver drives the rotating shaft 42 to move, the sliding belt 43 rolls along the outside of the cylinder head 2, thereby changing the surface-to-surface contact friction into rolling friction, which greatly reduces the difficulty of the relative movement between the limit pin 358 and the cylinder head 2.

[0074] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A clamping and limiting device for injector testing, disposed on both sides of a conveyor belt (1), for clamping and limiting cylinder heads (2) transported on the conveyor belt (1), characterized in that, The clamping and limiting device includes: Two sets of interleaved limiting components, one set of limiting components is set horizontally and the other set vertically; A linkage component is disposed between two sets of limiting components to link the two sets of limiting components. Both sets of limiting components are connected to the linkage components; when the cylinder head (2) pushes the horizontally set limiting components to move, it can drive the vertically set limiting components to press down on the top of the cylinder head (2).

2. The clamping and limiting device for injector detection as described in claim 1, characterized in that: The horizontally positioned limiting component can move along the transport direction of the cylinder head (2); the vertically positioned limiting component can move along a direction perpendicular to the conveyor belt (1); wherein, the limiting component includes a toothed belt, and the end of the toothed belt is connected to a limiting pin (358), and the limiting pin (358) is connected to the linkage component through the toothed belt.

3. The clamping and limiting device for injector detection as described in claim 2, characterized in that: The linkage component includes an external gear (351) and a synchronous gear (352) that mesh with each other, and respectively engage with the toothed belts of the two limiting components; The outer diameter of the synchronizing gear (352) is smaller than that of the outer gear (351), and the outer gear (351) is connected to a horizontally arranged limiting component, while the synchronizing gear (352) is connected to a vertically arranged limiting component.

4. The clamping and limiting device for injector detection as described in claim 3, characterized in that: The outer wall of the conveyor belt (1) is provided with a support plate (31), and a carrier box (32) is provided on the top of the support plate (31). A driver is provided on the support plate (31), and the carrier box (32) is driven to slide towards the position of the conveyor belt (1) by the driver. The limiting component and the linkage component are both located in the carrier box (32). When the carrier box (32) moves to the side of the support plate (31) close to the conveyor belt (1), the limiting pins (358) on the two limiting components are located above the conveyor belt (1).

5. The clamping and limiting device for injector detection as described in claim 4, characterized in that: The driver includes a self-locking motor (341), and the self-locking motor (341) is connected to a connecting rod (344) at the bottom of the support plate (31). Both ends of the connecting rod (344) are connected to a linkage gear (345), and the linkage gear (345) meshes with a positioning rack (33) at the bottom of the bearing box (32). When the self-locking motor (341) drives the linkage gear (345) to rotate, it can drive the bearing box (32) to slide. The carrier box (32) and the support plate (31) are connected by a slide rail (36).

6. The clamping and limiting device for injector detection as described in claim 4, characterized in that: The external gear (351) and the synchronous gear (352) are each provided with a positioning post (353) at their ends that are far apart from each other, and a torsion spring (354) is sleeved on the outside of the positioning post (353). The positioning post (353) is connected to the inner wall of the bearing box (32) through the torsion spring (354). When the linkage component rotates, the torsion spring (354) on the linkage component begins to store force.

7. The clamping and limiting device for injector detection as described in claim 6, characterized in that: The horizontally positioned limiting component corresponds to the slide groove on the outside of the carrier box (32), and the limiting pin (358) on the limiting component extends through the slide groove to the outside of the carrier box (32); The vertically positioned limiting component corresponds to the opening at the top of the carrier box (32), and the toothed strip on the limiting component extends through the opening to the top of the carrier box (32), and the limiting pin (358) is set on that end.

8. The clamping and limiting device for injector detection as described in claim 2, characterized in that: The limiting pin (358) is provided with a sliding member (4) at the end away from the toothed belt, and the sliding member (4) is located on the side of the limiting pin (358) close to the cylinder head (2). The sliding member (4) includes a mounting base (41), and the front end of the mounting base (41) is provided with two sets of corresponding rotating shafts (42). The outer walls of the two rotating shafts (42) are fitted with sliding belts (43). The limiting pin (358) is attached to the cylinder head (2) via a sliding band (43); when the driver drives the rotating shaft (42) to move, the sliding band (43) rolls along the outside of the cylinder head (2).

Images