A belt pulley spraying processing lifting appliance
Patent Information
- Application Number
- CN202522152743.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-11
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-10-11
AI Technical Summary
[0004]有鉴于此，本实用新型的目的在于提出一种汽车皮带轮喷涂加工吊具，以解决目前汽车皮带轮喷涂的封堵吊具通用性差的问题
[0011]本实用新型的有益效果：从上面所述可以看出，本实用新型提供的一种汽车皮带轮喷涂加工吊具，通过液体压力驱动柱状弹性膜膨胀的原理，吊具能够自动适应不同直径尺寸的皮带轮中心孔，一套吊具即可覆盖一定尺寸范围内的多种产品型号，彻底解决了传统专用吊具因型号繁多而导致的切换不便的难题，提升了设备利用率和生产柔性，整个装夹和拆卸过程仅通过控制液体的注入与抽吸即可完成，操作简单、迅速，相比传统需要手动旋紧或更换部件的吊具，减少了辅助作业时间，减轻了操作人员的劳动强度，有利于整体生产效率的提升。
Smart Images
Figure CN224778321U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive pulley processing technology, and in particular to an automotive pulley spraying and processing lifting tool. Background Technology
[0002] Automotive pulleys are one of the key components in the engine system, mainly used to transmit power and drive accessories such as generators, water pumps, and air conditioning compressors. To ensure their long-term durability and corrosion resistance in high-temperature, humid, and various chemical environments, they usually need to be coated with anti-corrosion paint or heat-resistant paint. Coating not only improves the appearance of the product, but more importantly, it forms a protective film that significantly extends the service life of the pulley.
[0003] During the painting process, the mounting threaded hole at the center of the pulley serves as a precision mating surface. Its internal threads must be kept clean and free of coating to ensure a precise and secure connection with the engine or other components. If the threaded hole is covered by paint, it will not only affect assembly but also require additional cleaning work, increasing costs and potentially damaging the threads. Therefore, during painting, a specialized lifting tool must be used to effectively seal and cover the threaded hole. Currently, the common practice is to design and manufacture specialized sealing lifting tools for pulleys of different models, center hole diameters, and thread specifications. However, automotive pulleys come in a wide variety of models and sizes. This "one-to-one" specialized lifting tool approach requires a large number of lifting tools of different specifications, leading to inconvenient management, cumbersome adjustments when switching production models, poor versatility, and an inability to quickly adapt to the flexible production needs of multiple varieties and small batches, increasing production complexity and costs. Utility Model Content
[0004] In view of this, the purpose of this utility model is to propose a lifting tool for automotive pulley spraying to solve the problem of poor versatility of current automotive pulley spraying sealing lifting tools.
[0005] To achieve the above objectives, this utility model provides a paint spraying fixture for automotive pulleys, including a suspension connecting frame, and further comprising: A central delivery pipe is located below the suspension connecting frame, and an injection port is provided at the top of the central delivery pipe; A central support rod is connected to the lower end of the central delivery pipe. A connecting delivery pipe is provided inside the central support rod. The top end of the connecting delivery pipe is connected to the central delivery pipe. A connecting opening is provided on the side wall of the central support rod. The connecting opening is connected to the injection port through the connecting delivery pipe and the central delivery pipe. A columnar elastic membrane is nested outside the central support rod. Both the upper and lower ends of the columnar elastic membrane are closedly connected to the central support rod. The inner side of the columnar elastic membrane and the outer side of the central support rod form a closed injection expansion chamber. The connecting delivery pipe is connected to the injection expansion chamber through a connecting opening. The outer surface of the columnar elastic membrane is uniformly provided with connecting protrusions.
[0006] Furthermore, a cylindrical hydraulic cylinder is provided above the central support rod, and a pressure-applying piston is nested and slidably arranged inside the cylindrical hydraulic cylinder. A central guide sleeve is provided at the center of the pressure-applying piston, and the pressure-applying piston is nested and slidably connected to the central delivery pipe through the central guide sleeve.
[0007] Furthermore, the interior of the cylindrical hydraulic cylinder is divided into an upper liquid storage chamber and a lower pressure chamber by a pressure-applying piston. The central delivery pipe is connected to the liquid storage chamber through an injection port. The liquid storage chamber is filled with liquid. A pressure spring is provided below the pressure-applying piston.
[0008] Furthermore, a locking guide sleeve is provided in the middle of the side wall of the cylindrical hydraulic cylinder, and an elastic locking pin is slidably nested inside the locking guide sleeve. A locking groove is provided on the side wall of the pressure piston. The elastic locking pin and the locking groove are mutually engaged. An unlocking lever is connected to the rear end of the elastic locking pin.
[0009] Furthermore, a suspension connecting rod is connected above the pressure piston, the upper end of the suspension connecting rod is connected to the suspension connecting frame, and a closed guide sleeve is provided at the top of the columnar hydraulic cylinder. The suspension connecting rod is slidably connected to the columnar hydraulic cylinder through the closed guide sleeve.
[0010] Furthermore, a tapered guide block is connected to the bottom of the central support rod.
[0011] The beneficial effects of this utility model are as follows: As can be seen from the above, the automotive pulley painting and processing lifting tool provided by this utility model utilizes the principle of liquid pressure driving the expansion of a columnar elastic membrane. The lifting tool can automatically adapt to the center holes of pulleys with different diameters. One set of lifting tools can cover multiple product models within a certain size range, completely solving the problem of inconvenient switching caused by the large number of models in traditional special lifting tools. This improves equipment utilization and production flexibility. The entire clamping and disassembly process can be completed simply by controlling the injection and suction of liquid. The operation is simple and quick. Compared with traditional lifting tools that require manual tightening or replacement of parts, it reduces auxiliary operation time, reduces the labor intensity of operators, and is conducive to improving overall production efficiency. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the internal structure of an embodiment of the present utility model; Figure 2 This is a front structural diagram of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the installation state structure of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the internal structure of the cylindrical hydraulic cylinder according to an embodiment of the present invention.
[0014] The diagram is marked as follows: 1. Central support rod; 101. Connecting delivery pipe; 102. Connecting opening; 103. Conical guide block; 2. Columnar elastic membrane; 201. Liquid injection expansion chamber; 202. Connecting protrusion; 3. Columnar hydraulic cylinder; 301. Liquid storage chamber; 302. Pressure chamber; 303. Pressure spring; 304. Closed guide sleeve; 4. Central delivery pipe; 401. Liquid injection port; 5. Pressure piston; 501. Central guide sleeve; 502. Locking slot; 6. Locking guide sleeve; 601. Elastic locking pin; 602. Unlocking pull rod; 7. Suspension connecting frame; 701. Suspension connecting rod. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.
[0016] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0017] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a car pulley painting hanger includes a suspension connecting frame 7, and further includes: The central delivery pipe 4 is located below the suspension connecting frame 7, and the top of the central delivery pipe 4 is provided with an injection port 401; A central support rod 1 is connected to the lower end of the central delivery pipe 4. A connecting delivery pipe 101 is provided inside the central support rod 1. The top end of the connecting delivery pipe 101 is connected to the central delivery pipe 4. A connecting opening 102 is provided on the side wall of the central support rod 1. The connecting opening 102 is connected to the injection port 401 through the connecting delivery pipe 101 and the central delivery pipe 4. A columnar elastic membrane 2 is nested on the outside of the central support rod 1. Both the upper and lower ends of the columnar elastic membrane 2 are closed and connected to the central support rod 1. The inner side of the columnar elastic membrane 2 and the outer side of the central support rod 1 form a closed liquid injection expansion chamber 201. The connecting delivery pipe 101 is connected to the liquid injection expansion chamber 201 through the connecting opening 102. Connecting protrusions 202 are uniformly arranged on the outer surface of the columnar elastic membrane 2.
[0018] In this embodiment, the suspension connection frame 7 of the lifting device is used to connect with an external conveyor chain or suspension system. The central delivery pipe 4 is fixed below the suspension connection frame 7, and its top injection port 401 is connected to a pumping system that can control liquid injection and extraction via a pipeline. The central support rod 1 is connected to the lower end of the central delivery pipe 4, and a columnar elastic membrane 2 is sleeved on its outer side. The upper two ends of the columnar elastic membrane 2 are sealed to the outer wall of the central support rod 1 by fastening rings or adhesives, thereby forming a closed injection expansion chamber 201 between its inner side and the outer side of the central support rod 1. The connecting opening 102 on the side wall of the central support rod 1... Through its internal connecting delivery pipe 101 and the central delivery pipe 4, it is ultimately connected to the injection port 401, forming a complete fluid channel. When spraying is required, the operator inserts the hanger from bottom to top through the central hole of the car pulley, allowing the central support rod 1 and the unexpanded columnar elastic membrane 2 to pass through the central hole of the pulley. Then, liquid, such as water or oil, is injected into the central delivery pipe 4 through the injection port 401. The liquid flows sequentially through the connecting delivery pipe 101 and enters the columnar elastic membrane 2 through the connecting opening 102. As liquid is continuously injected into the fluid expansion chamber 201 inside the elastic membrane 2, the pressure inside the expansion chamber 201 increases, causing the columnar elastic membrane 2 to expand and deform uniformly outward. Because the outer surface of the columnar elastic membrane 2 is uniformly provided with connecting protrusions 202, when the membrane expands, these protrusions tightly abut against and press against the inner wall of the central hole of the pulley. This pressing force generates sufficient friction to reliably suspend and fix the car pulley. Simultaneously, the expanded columnar elastic membrane 2 effectively seals the central hole, especially the internal... The installation threads prevent paint from entering during spraying. After spraying, when the pulley needs to be removed, the pumping system is reversed, and the liquid in the expansion chamber 201 is drawn back through the injection port 401. The columnar elastic membrane 2 contracts due to the release of internal pressure, returning to its original shape and disengaging from the inner wall of the pulley's central hole. At this point, the pulley can be easily removed from the lifting device, completing the entire processing flow. By using the principle of liquid pressure to drive the expansion of the columnar elastic membrane 2, the lifting device can automatically adapt to the central holes of pulleys with different diameters. One set of lifting devices can cover multiple product models within a certain size range, completely solving the problems of chaotic management and inconvenient switching caused by the large number of models of traditional special lifting devices. This greatly improves equipment utilization and production flexibility. The entire clamping and disassembly process can be completed simply by controlling the injection and suction of liquid. The operation is simple and quick. Compared with traditional lifting devices that require manual tightening or replacement of parts, it significantly reduces auxiliary operation time, reduces the labor intensity of operators, and is conducive to improving overall production efficiency.
[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, preferably, a cylindrical hydraulic cylinder 3 is provided above the central support rod 1 of the lifting device. A pressure-applying piston 5 is nested and slidably arranged inside the cylindrical hydraulic cylinder 3. A central guide sleeve 501 is fixed at the center of the piston, allowing the pressure-applying piston 5 to form a nested sliding connection with the central delivery pipe 4 through the central guide sleeve 501, thereby ensuring smooth axial movement of the piston along the central delivery pipe 4. The internal space of the cylindrical hydraulic cylinder 3 is divided into upper and lower parts by the pressure-applying piston 5. The upper part is a liquid storage chamber 301, and the lower part is a pressure chamber 302. The injection port 401 at the top of the central delivery pipe 4 is connected to the liquid storage chamber 301, which is pre-filled with liquid. Below the pressure-applying piston 5, a pressure spring 303 is installed. This spring continuously pushes the pressure-applying piston 5 upwards. In the initial state or when pressure needs to be applied, the elastic force of the pressure spring 303 will push the piston... The piston 5 slides upwards towards the cylindrical hydraulic cylinder 3. The movement of the piston compresses the space of the reservoir 301 above it, thereby applying a stable static pressure to the liquid in the reservoir 301. The pressurized liquid enters the central delivery pipe 4 through the injection port 401, and is finally delivered to the injection expansion chamber 201 inside the cylindrical elastic membrane 2 via the connecting delivery pipe 101 and the connecting opening 102. This provides an automatic and continuous driving force source for the entire closed liquid circuit system, ensuring that the liquid can fill the injection expansion chamber 201 and maintain its internal pressure. The pressure spring 303 provides a constant and reliable static pressure to the liquid in the reservoir 301 by pushing the piston. This pressure, as a driving source, can automatically press the liquid into the injection expansion chamber 201 of the cylindrical elastic membrane 2, causing it to expand. This eliminates the need to rely entirely on an external power pump, simplifying the system configuration and improving the spontaneity and reliability of the response.
[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, preferably, a locking guide sleeve 6 is fixedly installed at the middle position of the side wall of the cylindrical hydraulic cylinder 3 of the lifting device. An elastic locking pin 601 is slidably nested inside the locking guide sleeve 6. Correspondingly, a locking groove 502 that matches it is machined on the side wall of the pressure piston 5. Before the suspension operation, the operator can pre-compress the pressure piston 5 downwards, so that it moves to the bottom of the cylindrical hydraulic cylinder 3 against the elastic force of the pressure spring 303. When the piston moves to the predetermined position, the locking groove 502 on its side wall will be aligned with the elastic locking pin 601. At this time, under the push of the elastic element, such as the built-in spring, the inner end of the elastic locking pin 601 will automatically embed into the locking groove 502 of the pressure piston 5, thereby reliably locking the piston in this compressed state. At this time, the pressure spring 303 is in the stored energy state, but the stored energy is not fully utilized. The liquid in the liquid tank 301 does not flow because the piston is locked. When it is necessary to suspend the pulley, the operator first puts the center hole of the pulley on the outside of the unexpanded cylindrical elastic membrane 2 and the central support rod 1. After the workpiece is in place, the operator only needs to pull the locking pin outward by the unlocking lever 602 connected to the rear end of the elastic locking pin 601, so that its front end exits from the locking groove 502 of the pressure piston 5. Once the lock is released, the previously compressed pressure piston 5 will quickly return to its original position under the strong thrust of the pressure spring 303. The rapid movement of the piston will apply pressure to the liquid in the liquid storage tank 301, forcing the liquid to be quickly injected into the liquid expansion chamber 201 of the cylindrical elastic membrane 2 through the central delivery pipe 4 and other channels, so that it expands instantly, thereby quickly completing the expansion, fixing and sealing of the pulley, shortening the core clamping time and effectively improving the overall production efficiency.
[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, preferably, a suspension connecting rod 701 is fixedly connected above the pressure piston 5 of the lifting device. The upper end of the suspension connecting rod 701 passes through the cylindrical hydraulic cylinder 3 and is fixedly connected to the upper suspension connecting frame 7. A closed guide sleeve 304 is provided at the top of the cylindrical hydraulic cylinder 3. The suspension connecting rod 701 passes through this closed guide sleeve 304 and forms a sliding connection with it. This allows the cylindrical hydraulic cylinder 3 to slide up and down relative to the fixed suspension connecting rod 701 and the pressure piston 5. When the pulley is placed on the outside of the central support rod 1, the entire lifting device is lifted by the suspension connecting frame 7. At this time, the weight of the pulley will naturally pull down the central support rod 1, thereby driving the integral cylindrical hydraulic cylinder 3 to move downward. Since the pressure piston 5 is connected to the fixed suspension connecting frame 7 through the suspension connecting rod 701, it generates an upward relative movement relative to the downward moving cylindrical hydraulic cylinder 3. This relative movement compresses the pressure spring 303 below. At the same time, the piston also moves upward relative to the liquid storage tank 301, thereby applying pressure to the liquid in the liquid storage tank 301, forcing the liquid to be injected into the liquid expansion tank 201 of the cylindrical elastic membrane 2 through the central delivery pipe 4, causing it to expand and grip the pulley. During this process, the weight of the pulley is converted into the driving force for establishing clamping pressure, and the system dynamically balances to form a constant pressure that adapts to the suspended weight, ensuring reliable clamping. The pulley's weight is transformed into a power source for establishing clamping pressure, and the magnitude of the clamping force automatically matches the workpiece's weight, forming a dynamically balanced constant pressure. This adaptability effectively prevents the workpiece from loosening and slipping due to insufficient clamping force, or from damaging the workpiece or elastic membrane due to excessive clamping force, resulting in higher safety and reliability. When it's time to remove the workpiece after processing... When removing the pulley, the operator only needs to lift or push the cylindrical hydraulic cylinder 3 or its connected components upwards from below, causing it to move upwards relative to the fixed pressure piston 5. This action causes the pressure piston 5 to move downwards relative to the liquid storage tank 301, thereby generating a negative pressure in the liquid storage tank 301. This negative pressure will draw the liquid in the liquid expansion chamber 201 back to the liquid storage tank 301 through the original path. The cylindrical elastic membrane 2 contracts due to the emptying of the internal liquid and disengages from the inner wall of the central hole of the pulley, allowing the pulley to be easily removed, greatly improving work efficiency.
[0022] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, preferably, a conical guide block 103 is fixedly connected to the bottom of the central support rod 1 of the lifting device. This conical guide block 103 is located at the lowest end of the entire lifting device and has a shape resembling a truncated cone or a cone, forming a natural guiding slope. When the operator needs to install the car pulley onto the lifting device, they only need to roughly align the center hole of the pulley with the bottom of the lifting device and then slide it upwards. At this time, the lower edge of the center hole of the pulley will first contact the conical slope of the bottom conical guide block 103. As the pulley continues to be pushed upwards, this conical slope will automatically... The tapered guide block 103 guides and corrects the center position of the pulley, enabling it to easily and smoothly fit onto the outside of the central support rod 1 and the unexpanded cylindrical elastic membrane 2 until it reaches the predetermined suspension working position. The tapered guide block 103, with its inclined surface structure, can automatically compensate for the initial alignment deviation that may exist during operation. When the center hole of the pulley contacts it, it will naturally slide towards the center under the guidance of the inclined surface, achieving self-alignment. This greatly facilitates the workpiece fitting operation, reduces the alignment accuracy requirements, and can prevent the edge of the pulley from directly impacting or scratching the bottom end of the central support rod 1 or the surface of the cylindrical elastic membrane 2.
[0023] The automotive pulley painting and processing lifting tool provided by this utility model utilizes the principle of expanding a cylindrical elastic membrane 2 driven by liquid pressure. The lifting tool can automatically adapt to the center hole of pulleys with different diameters. One set of lifting tools can cover multiple product models within a certain size range, completely solving the problems of chaotic management and inconvenient switching caused by the large number of models of traditional special lifting tools. It greatly improves equipment utilization and production flexibility. The entire clamping and disassembly process can be completed by controlling the injection and suction of liquid. The operation is simple and quick. Compared with traditional lifting tools that require manual tightening or replacement of parts, it greatly reduces auxiliary operation time, reduces the labor intensity of operators, and is conducive to improving overall production efficiency.
[0024] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this utility model is limited to these examples; within the framework of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of this utility model as described above, which are not provided in the details for the sake of brevity. Any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A paint spraying fixture for automotive pulleys, comprising a suspension connecting frame (7), characterized in that, Also includes: A central delivery pipe (4) is located below the suspension connecting frame (7), and an injection port (401) is provided at the top of the central delivery pipe (4); A central support rod (1) is connected to the lower end of the central delivery pipe (4). A connecting delivery pipe (101) is provided inside the central support rod (1). The top end of the connecting delivery pipe (101) is connected to the central delivery pipe (4). A connecting opening (102) is provided on the side wall of the central support rod (1). The connecting opening (102) is connected to the injection port (401) through the connecting delivery pipe (101) and the central delivery pipe (4). A columnar elastic membrane (2) is nested on the outside of the central support rod (1). Both the upper and lower ends of the columnar elastic membrane (2) are closedly connected to the central support rod (1). The inner side of the columnar elastic membrane (2) and the outer side of the central support rod (1) form a closed liquid injection expansion chamber (201). The connecting delivery pipe (101) is connected to the liquid injection expansion chamber (201) through the connecting opening (102). The outer surface of the columnar elastic membrane (2) is uniformly provided with connecting protrusions (202).
2. The automotive pulley painting and processing lifting tool according to claim 1, characterized in that, A columnar hydraulic cylinder (3) is provided above the central support rod (1). A pressure piston (5) is nested and slidably provided inside the columnar hydraulic cylinder (3). A central guide sleeve (501) is provided at the center of the pressure piston (5). The pressure piston (5) is nested and slidably connected to the central delivery pipe (4) through the central guide sleeve (501).
3. The automotive pulley painting and processing lifting tool according to claim 2, characterized in that, The interior of the cylindrical hydraulic cylinder (3) is divided into an upper liquid storage chamber (301) and a lower pressure chamber (302) by a pressure piston (5). The central delivery pipe (4) is connected to the liquid storage chamber (301) through the injection port (401). The liquid storage chamber (301) is filled with liquid. A pressure spring (303) is provided below the pressure piston (5).
4. The automotive pulley painting and processing lifting tool according to claim 3, characterized in that, A locking guide sleeve (6) is provided in the middle of the side wall of the cylindrical hydraulic cylinder (3). An elastic locking pin (601) is nested and slidably provided on the inner side of the locking guide sleeve (6). A locking groove (502) is provided on the side wall of the pressure piston (5). The elastic locking pin (601) and the locking groove (502) are mutually cooperated. An unlocking lever (602) is connected to the rear end of the elastic locking pin (601).
5. The automotive pulley painting and processing lifting tool according to claim 4, characterized in that, A suspension connecting rod (701) is connected above the pressure piston (5). The upper end of the suspension connecting rod (701) is connected to the suspension connecting frame (7). A closed guide sleeve (304) is provided on the top of the columnar hydraulic cylinder (3). The suspension connecting rod (701) is slidably connected to the columnar hydraulic cylinder (3) through the closed guide sleeve (304).
6. The automotive pulley painting and processing lifting tool according to claim 1, characterized in that, The bottom of the central support rod (1) is connected to a tapered guide block (103).