Signal disk and gear press-fitting device and press-fitting method

Abstract

The application provides a signal disc and gear press-fitting device and press-fitting method, and relates to the technical field of camshafts, and comprises a positioning seat, a first positioning assembly, a second positioning assembly, a coarse positioning device and a fine positioning device.The coarse positioning device is used for coarsely positioning the signal disc on the top surface of the positioning seat, and the fine positioning device is used for angle positioning of a signal groove on the signal disc.The second positioning assembly comprises a positioning shaft and a positioning key.The positioning shaft is fixedly arranged at the center of the top surface of the positioning seat and is used for positioning a gear center hole.The positioning key is fixedly arranged on the positioning shaft and is used for cooperation with the fine positioning device so as to angle position a key groove on the gear center hole and the signal groove on the signal disc.The gear press-fitting mode can avoid press-fitting deformation of the signal disc through signal disc fixation.The first positioning assembly and the second positioning assembly can cooperate with each other to ensure the concentricity of the signal disc and the gear after press fitting, and can also ensure the timing angle precision of the signal disc and the gear after press fitting.

Description

Technical Field

[0001] This invention relates to the field of camshaft production equipment technology, and in particular to a signal disc and gear pressing device and pressing method. Background Technology

[0002] The camshaft is a crucial component of the engine, directly affecting its overall performance. The signal disc on the camshaft is the foundation for ECU data acquisition; the data signals collected by the signal disc angle sensor directly influence engine ignition and fuel injection, impacting the overall engine operation. Currently, the signal disc and gear are typically press-fitted into an assembly before being installed on the camshaft. Mounting the signal disc on the gear ensures that it accurately measures the gear's movement, which is essential for precise motion control and feedback.

[0003] Currently, the signal disc and gear are typically press-fitted together by fixing the gear and pressing the signal disc into the gear. This pressing method presents three problems: 1) The signal disc is a thin-walled part, and during interference fitting, it deforms under axial pressure, making it impossible to guarantee flatness and resulting in a very low pass rate; 2) The timing angle has a large variation during pressing, leading to a high rework rate and, in severe cases, rendering the signal disc unusable; 3) The signal plate's center is not accurately positioned, causing its outer circle to be misaligned with the gear's inner hole, deforming the signal disc during pressing. Summary of the Invention

[0004] In view of this, the present invention proposes a signal disk and gear pressing device and pressing method to solve the problems that traditional pressing methods cause the signal disk to be easily deformed, and the timing angle accuracy and concentricity with the gear cannot be guaranteed.

[0005] The technical solution of this invention is implemented as follows:

[0006] In a first aspect, the present invention provides a signal disk and gear pressing device, comprising:

[0007] The positioning base has a cylindrical structure;

[0008] The first positioning component includes a coarse positioning device and a fine positioning device disposed on the top surface of the positioning base. The coarse positioning device is used to coarsely position the signal disk on the top surface of the positioning base, and the fine positioning device is used to perform angular positioning of the signal groove on the signal disk.

[0009] The second positioning component includes a positioning shaft and a positioning key. The positioning shaft is fixedly disposed at the center of the top surface of the positioning seat and is used to position the center hole of the gear. The positioning key is fixedly disposed on the positioning shaft and is used to cooperate with the precision positioning device to make the keyway on the center hole of the gear and the signal groove on the signal disk perform angular positioning.

[0010] Based on the above technical solution, preferably, the coarse positioning device includes a first positioning pin and a second positioning pin fixedly disposed on the top surface of the positioning seat. The first positioning pin and the second positioning pin are spaced apart around the center of the positioning seat. The first positioning pin and the second positioning pin are respectively used to coarsely position the mounting holes on the signal disk. The first positioning pin and the second positioning pin are both clearance-fitted with the mounting holes.

[0011] Based on the above technical solution, preferably, the precision positioning device includes a reference positioning component and a fine-tuning device that are fixedly disposed at the edge of the top surface of the positioning seat in the circumferential direction around the positioning seat.

[0012] The reference positioning component includes a first fixing block and a first positioning block. The first fixing block is fixedly disposed on the top surface of the positioning seat, and the first positioning block is fixedly disposed on the top surface of the first fixing block. It is used to be inserted into the initial signal slot on the signal disk. The angle between the positioning surface of the positioning key and the positioning surface of the first positioning block is the timing angle after the gear and the signal disk are assembled.

[0013] The fine-tuning device includes a second fixed block, a second positioning block, a screw, and a first elastic element. The second fixed block is fixedly mounted on a positioning seat on one side of the first fixed block. The second positioning block is located on the side of the second fixed block facing the first fixed block. One end of the screw is horizontally fixedly connected to the second positioning block, and the other end moves through the second fixed block and is connected to a fastener. The screw can move horizontally relative to the second fixed block. The first elastic element is sleeved on the screw between the second positioning block and the second fixed block. The upper end of the second positioning block is used to insert into the signal slot at the upper end of the signal disk. The second positioning block and the first positioning block cooperate with each other to enable the signal disk to be precisely positioned on the positioning block.

[0014] Furthermore, preferably, the fine-tuning device further includes a guide rod, which is horizontally disposed below the screw. One end of the guide rod is horizontally fixedly connected to the second positioning block, and the other end movably passes through the second fixed block. The guide rod can move horizontally relative to the second fixed block.

[0015] Based on the above technical solution, preferably, the first positioning block and the initial signal slot on the signal disk are fitted with a clearance, and the second positioning block and the signal slot at the end of the signal disk are fitted with a clearance.

[0016] Based on the above technical solution, preferably, an installation groove for installing the second positioning component is provided at the center of the top surface of the positioning seat. Two third positioning pins are provided at equal intervals around the central axis of the installation groove on the bottom surface of the installation groove. The two third positioning pins are used for positioning and connection with the positioning shaft. The line connecting the two third positioning pins is perpendicular to the positioning surface of the positioning key.

[0017] Based on the above technical solution, preferably, it also includes a pressing mechanism, which includes a pressing seat and a floating device. The pressing seat has a mounting cavity with an opening at the top. The positioning seat is disposed in the mounting cavity. The floating device is disposed in the mounting cavity and connected to the positioning seat. The positioning seat can move up and down along the mounting cavity through the floating device. The outer diameter of the positioning seat is smaller than the outer diameter of the signal disk. The top of the pressing seat has an annular step, and the outer diameter of the annular step is smaller than the outer diameter of the signal disk.

[0018] Furthermore, preferably, the lower end of the positioning shaft is also fixedly provided with a mounting base connected to the positioning seat, and the top surface of the mounting base is at least as high as the thickness of a signal disk as the top surface of the positioning seat.

[0019] Further, preferably, the floating device includes a bolt and a second elastic element. The second elastic element is disposed in the mounting cavity. The upper end of the second elastic element abuts against the bottom end of the positioning seat, and the lower end of the second elastic element abuts against the inner bottom surface of the mounting cavity. The bolt moves vertically upward into the mounting cavity and passes through the second elastic element. The upper end of the bolt is fixedly connected to the bottom end of the positioning seat.

[0020] On the other hand, the present invention discloses a method for pressing a signal disk and a gear together, utilizing the signal disk and gear pressing device described in the first aspect, comprising the following operational steps:

[0021] S1. Place the signal disk horizontally on the top surface of the positioning seat, and make the mounting holes on the signal disk fit onto the first positioning pin and the second positioning pin respectively. At the same time, insert the first positioning block into the initial signal groove on the signal disk, and insert the second positioning block into the signal groove at the end of the signal disk to complete the angular positioning of the signal disk with the positioning key on the positioning seat.

[0022] S2. Fit the center hole of the gear onto the positioning shaft and connect the positioning key with the keyway of the gear to achieve timing angle positioning of the gear and the signal disk on the positioning seat;

[0023] S3. Press the gear down using the press head of the pressing equipment. The gear, positioning seat, and signal disk move down synchronously relative to the pressing seat. When the signal disk contacts the top surface of the annular step, the signal disk stops moving down and continues to press down on the gear. The gear and positioning seat move down synchronously relative to the pressing seat until the inner end face of the gear is tightly pressed against the upper end face of the signal disk. Hold the pressure for a certain period of time to complete the pressing operation of the signal disk and gear.

[0024] The present invention has the following advantages over the prior art:

[0025] (1) The signal disk and gear pressing device disclosed in this invention sets a first positioning component on the positioning seat, places the signal disk on the top surface of the positioning seat, and achieves the positioning of the signal disk on the positioning seat through the first positioning component. Then, the gear is placed on the surface of the signal disk through the second positioning component. At this time, the angle between the keyway on the gear and the signal groove on the signal disk is determined. By pressing the gear, the signal disk can be easily pressed into the mounting groove of the gear. Since the signal disk is always on the top surface of the positioning seat during the pressing process, the deformation of the signal disk during pressing can be avoided, thereby ensuring the flatness of the signal disk. Through the cooperation of the first positioning component and the second positioning component, on the one hand, the concentricity of the signal disk and the gear after pressing can be ensured. At the same time, through the cooperation of the positioning key and the precision positioning device, the angle positioning of the keyway on the gear and the signal groove on the signal disk can be performed, which can ensure the accuracy of the timing angle after the signal disk and the gear are pressed.

[0026] (2) By setting reference positioning parts and fine adjustment devices at intervals at the edge of the top surface of the positioning seat, the angle between the positioning surface of the positioning key and the side of the signal groove that contacts the first positioning block is unique and will not change during the gear pressing process, thereby ensuring the timing angle accuracy value after assembly.

[0027] (3) By setting the annular step, it is convenient to install the mounting groove on the outer circumference of the annular step after the signal disk is fully pressed into the inner end face of the mounting groove of the gear. By making the outer diameter of the annular step smaller than the outer diameter of the signal disk, it is possible to avoid the annular step from getting stuck with the side wall of the mounting groove after entering the mounting groove.

[0028] (4) A mounting base connected to the positioning seat is fixedly installed at the lower end of the positioning shaft. The top surface of the mounting base is at least as high as the thickness of the signal disk as the top surface of the positioning seat. With this technical solution, when the signal disk is in horizontal contact with the top surface of the annular step, since the top surface of the mounting base is higher than the top surface of the signal disk, and since the bottom end of the gear is in contact with the top surface of the mounting base, the mounting groove of the gear does not contact the signal disk at this time, thus avoiding damage and deformation of the signal disk by the gear and ensuring the flatness of the signal disk. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the planar structure of the gear disclosed in this invention;

[0031] Figure 2 This is a schematic diagram of the planar structure of the signal disk disclosed in this invention;

[0032] Figure 3 This is a schematic diagram of the planar structure of the signal disk and the gear disk after assembly, as disclosed in this invention.

[0033] Figure 4 This is a three-dimensional structural diagram of the pressing device disclosed in this invention;

[0034] Figure 5 This is an exploded view of the pressing device, signal disk, and gears disclosed in this invention.

[0035] Figure 6 for Figure 4 Enlarged view of a portion of point A in the middle;

[0036] Figure 7 This is a three-dimensional schematic diagram of the assembly structure of the pressing device and the signal disk disclosed in this invention;

[0037] Figure 8 This is a schematic plan view of the assembly structure of the pressing device and the signal disk disclosed in this invention;

[0038] Figure 9 This is a schematic diagram of the initial working state of the pressing device disclosed in this invention;

[0039] Figure 10 This is a schematic diagram of the first state during the operation of the pressing device disclosed in this invention;

[0040] Figure 11 This is a schematic diagram of the second state during the operation of the pressing device disclosed in this invention;

[0041] Figure label:

[0042] 100, Signal disk; 200, Gear; 120, Mounting hole; 110, Signal groove; 210, Center hole; 220, Keyway; 230, Mounting recess; 1, Positioning seat; 2, First positioning assembly; 21, Coarse positioning device; 22, Fine positioning device; 3, Second positioning assembly; 31, Positioning shaft; 32, Positioning key; 211, First positioning pin; 212, Second positioning pin; 221, Reference positioning element; 222, Fine adjustment device; 2211, The... 1. Fixed block; 2212. First positioning block; 2221. Second fixed block; 2222. Second positioning block; 2223. Screw; 2224. First elastic element; 2225. Fastener; 2226. Guide rod; 11. Mounting groove; 111. Third positioning pin; 4. Pressing mechanism; 41. Press-fit seat; 42. Floating device; 412. Mounting cavity; 411. Annular step; 311. Mounting seat; 421. Bolt; 422. Second elastic element. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] like Figure 1 As shown, combined with Figure 2-3 This invention discloses a gear 200 for assembly with a camshaft via its central hole 210 and keyway 220. The surface of the gear 200 is provided with a mounting groove 230 for assembly with a signal disk 100. The signal disk 100 has multiple signal slots 110 arranged around its central axis. Specifically, the multiple signal slots 110 are not arranged in a 360° pattern on the surface of the signal disk 100; there is a gap between the multiple signal slots 110, thus separating them. These multiple signal slots 110 can be marked at the gap as the initial end signal slot 110 and the end signal slot 110, respectively.

[0045] After the signal disk 100 and gear 200 are assembled, it is necessary to ensure that the angle between the signal groove 110 and the keyway 220 on the gear 200 meets the precise timing angle data. For example, in this embodiment, the timing angle to be met after the signal disk 100 and gear 200 are press-fitted is 84°±0.1°. Therefore, after the assembly of gear 200 and signal disk 100 is installed on the camshaft, it can ensure that the angle sensor of signal disk 100 can collect accurate data signals.

[0046] Because the signal disk 100 is relatively thin, usually formed by stamping a thin sheet of 2-3mm, some problems may occur during the assembly process of the signal disk 100 into the mounting groove 230 of the gear 200 while the gear 200 is fixed: 1) The signal disk 100 is a thin-walled part, and it will deform under axial pressure during interference fitting, making it impossible to guarantee flatness and resulting in a very low pass rate; 2) The timing angle has a large angular dispersion during the pressing process, resulting in a high rework rate and, in severe cases, scrapping the signal disk 100; 3) The center of the signal plate is not accurately positioned, causing its outer circle to be misaligned with the inner hole of the gear 200, which will deform the signal disk 100 during pressing.

[0047] To address the aforementioned problems, the first aspect of the present invention provides a signal disk and gear pressing device, as shown in the attached drawing. Figure 3-5 As shown, the press-fitting device disclosed in this invention includes a positioning seat 1, a first positioning component 2, and a second positioning component 3.

[0048] The positioning seat 1 has a cylindrical structure and is used to install the signal disk 100. In this embodiment, the positioning seat 1 is preferably cylindrical to match the shape of the signal disk 100.

[0049] The first positioning component 2 includes a coarse positioning device 21 and a fine positioning device 22 disposed on the top surface of the positioning seat 1. The coarse positioning device 21 is used to coarsely position the signal disk 100 on the top surface of the positioning seat 1, and the fine positioning device 22 is used to perform angular positioning on the signal groove 110 on the signal disk 100.

[0050] Specifically, the signal disk 100 is placed horizontally on the top surface of the positioning seat 1. The coarse positioning device 21 allows the signal disk 100 to be positioned on the positioning seat 1, providing a certain amount of movement space on its outer circumference. This facilitates the adaptive micro-movement of the signal disk 100 in the horizontal direction during the pressing process between the gear 200 and the signal disk 100, effectively pressing it into the mounting groove 230 of the gear 200. The fine positioning device 22 is used to position the signal groove 110 on the signal disk 100, preventing the signal disk 100 from rotating relative to the positioning seat 1. This allows for precise angular positioning with the gear 200.

[0051] The second positioning component 3 includes a positioning shaft 31 and a positioning key 32. The positioning shaft 31 is fixedly disposed at the center of the top surface of the positioning seat 1 and is used to position the center hole 210 of the gear 200. In some embodiments, the diameter of the positioning shaft 31 is matched with the diameter of the center hole 210 of the gear 200, thereby achieving coaxiality between the gear 200 and the positioning seat 1. The positioning key 32 is fixedly disposed on the positioning shaft 31 and is used to cooperate with the precision positioning device 22 to perform angular positioning of the keyway 220 on the center hole 210 of the gear 200 and the signal groove 110 on the signal disk 100. In this embodiment, by setting the precision positioning device 22 on the positioning seat 1 and simultaneously installing the positioning key 32 on the positioning shaft 31, while ensuring the concentricity of the gear 200 and the positioning seat 1, the angle between the positioning key 32 and the precision positioning device 22 on the positioning seat 1 can be ensured, thereby achieving angular positioning of the keyway 220 on the gear 200 and the signal groove 110 on the signal disk 100.

[0052] The signal disk and gear pressing device disclosed in this invention uses a first positioning component 2 on a positioning base 1 to place the signal disk 100 on the top surface of the positioning base 1. The first positioning component 2 positions the signal disk 100 on the positioning base 1. Then, the gear 200 is placed on the surface of the signal disk 100 using a second positioning component 3. At this point, the angle between the keyway 220 on the gear 200 and the signal groove 110 on the signal disk 100 is fixed. By pressing the gear 200, the signal disk 100 can be easily pressed into the mounting groove 230 of the gear 200. Since the signal disk 100 is always on the top surface of the positioning seat 1 during the pressing process, deformation of the signal disk 100 during pressing can be avoided, thus ensuring the flatness of the signal disk 100. Through the cooperation of the first positioning component 2 and the second positioning component 3, on the one hand, the concentricity of the signal disk 100 and the gear 200 after pressing can be ensured. At the same time, through the cooperation of the positioning key 32 and the precision positioning device 22, the keyway 220 of the gear 200 and the signal groove 110 on the signal disk 100 are angularly positioned, which can ensure the accuracy of the timing angle after the signal disk 100 and the gear 200 are pressed together.

[0053] To ensure that the gear 200 and the signal disk 100 are tightly fitted after pressing, the diameter of the mounting groove 230 of the gear 200 is usually slightly smaller than the diameter of the signal disk 100. In this way, the gear 200 and the signal disk 100 achieve a tight fit through interference fit.

[0054] To ensure that the signal disk 100 can be smoothly pressed into the mounting groove 230 of the gear 200, this embodiment uses a coarse positioning device 21 on the positioning seat 1. Specifically, the coarse positioning device 21 includes a first positioning pin 211 and a second positioning pin 212 fixedly disposed on the top surface of the positioning seat 1. The first positioning pin 211 and the second positioning pin 212 are spaced apart around the center of the positioning seat 1. The first positioning pin 211 and the second positioning pin 212 are used to coarsely position the mounting hole 120 on the signal disk 100. Both the first positioning pin 211 and the second positioning pin 212 are clearance-fitted with the mounting hole 120.

[0055] The signal disk 100 has three unevenly distributed mounting holes 120 (the angles between the three holes are 125°, 115° and 120°). In this embodiment, the first positioning pin 211 and the second positioning pin 212 are designed using these three holes. Their function is to ensure that the signal disk 100 can only be placed into the fixture in one correct orientation position, and cannot be placed in other positions, thereby avoiding incorrect placement of the signal disk 100. In addition, the diameter design of the first positioning pin 211 and the second positioning pin 212 ensures that there is a gap of 0.1mm-0.25mm on one side of the mounting hole 120, so as to ensure sufficient movement space when the outer circle of the signal disk 100 is positioned, thereby facilitating the slight horizontal movement of the signal disk 100 on the positioning disk to press it into the mounting groove 230 of the gear 200.

[0056] To achieve precise positioning of the signal slot 110 on the signal disk 100 using the precision positioning device 22, this embodiment illustrates a preferred implementation of the precision positioning device 22. Specifically, refer to the attached drawing. Figure 6-8 As shown, the precision positioning device 22 includes a reference positioning element 221 and a fine adjustment device 222 fixedly disposed on the edge of the top surface of the positioning seat 1 in the circumferential direction. The reference positioning element 221 and the fine adjustment device 222 are spaced apart.

[0057] The reference positioning component 221 includes a first fixing block 2211 and a first positioning block 2212. The first fixing block 2211 is fixedly disposed on the top surface of the positioning seat 1, and the first positioning block 2212 is fixedly disposed on the top surface of the first fixing block 2211. It is used to be inserted into the initial signal slot 110 of the signal disk 100. The angle between the positioning surface of the positioning key 32 and the positioning surface of the first positioning block 2212 is the timing angle after the gear 200 and the signal disk 100 are assembled.

[0058] In the above embodiment, the top surface of the first fixing block 2211 is not higher than the top surface of the positioning seat 1, so as to avoid the signal disk 100 being blocked by the first fixing block 2211 when it is placed on the top surface of the positioning seat 1. By setting the first positioning block 2212 on the top surface of the first fixing block 2211, the position of the initial signal disk 100 on the signal disk 100 can be constrained. After the signal disk 100 is coarsely positioned on the positioning seat 1 by the first positioning component 2, the first positioning block 2212 can restrict the signal disk 100 from rotating around the center of the positioning seat 1 in a direction away from the fine adjustment device 222, thereby realizing that the positioning surface of the first positioning block 2212 and the positioning surface on the initial signal groove 110 on the signal disk 100 are in contact.

[0059] At the same time, by determining the position of the positioning key 32 in the axial direction of the positioning shaft 31, it can be ensured that the angle between the positioning surface of the positioning key 32 and the positioning surface of the first positioning block 2212 is unique, and this angle is the timing angle after the gear 200 and the signal disk 100 are assembled.

[0060] In order to facilitate the insertion of the first positioning block 2212 into the signal slot 110 of the signal disk 100, this embodiment makes the first positioning block 2212 and the initial signal slot 110 on the signal disk 100 with a gap fit. Specifically, the length and width of the signal slot 110 are both larger than the length and width of the first positioning block 2212.

[0061] During the press-fitting process of gear 200, gear 200 will drive signal disk 100 to rotate horizontally in the axial direction. This will cause signal disk 100 to rotate horizontally, causing signal groove 110 connected to the first positioning block 2212 to rotate in the direction of fine adjustment device 222. This will reduce the angle between the initial signal groove 110 on signal disk 100 and positioning key 32, making it impossible to achieve the design value.

[0062] If the dimensions of the first positioning block 2212 and the signal slot 110 on the signal disk 100 are matched, it becomes inconvenient to connect the signal slot 110 and the first positioning block 2212 on the positioning seat 1. Even if the fit clearance between the first positioning block 2212 and the signal slot 110 is very small, there is still a risk that the signal disk 100 may rotate slightly during the press-fitting of the gear 200 and the signal disk 100. Therefore, the timing angle accuracy after the gear 200 and the signal disk 100 are press-fitted cannot be guaranteed.

[0063] To this end, the present invention achieves this by providing a fine-tuning device 222 on one side of the reference positioning member 221. Specifically, the fine-tuning device 222 includes a second fixing block 2221, a second positioning block 2222, a screw 2223, and a first elastic member 2224. The second fixing block 2221 is fixedly mounted on the positioning seat 1 on one side of the first fixing block 2211, and the second positioning block 2222 is located on the side of the second fixing block 2221 facing the first fixing block 2211. One end of the screw 2223 is horizontally fixed to the second positioning block 2222. The other end of the screw 2223 is connected to the second fixing block 2221 and is connected to the fastener 2225. The screw 2223 can move horizontally relative to the second fixing block 2221. The first elastic element 2224 is sleeved on the screw 2223 between the second positioning block 2222 and the second fixing block 2221. The upper end of the second positioning block 2222 is used to insert into the signal groove 110 at the upper end of the signal disk 100. The second positioning block 2222 and the first positioning block 2212 cooperate with each other to make the signal disk 100 precisely positioned on the positioning block.

[0064] Using the above technical solution, when the signal disk 100 is placed on the positioning seat 1, the second positioning block 2222 is first pushed towards the second fixing block 2221. The second positioning block 2222 drives the screw 2223 to translate towards the second fixing block 2221. The second positioning block 2222 compresses the first elastic member 2224, increasing the distance between the first positioning block 2212 and the second positioning block 2222, and ensuring that the second positioning block 2222 can be inserted into the signal slot 110 at the upper end of the signal disk 100. After the first positioning block 2212 is inserted into the initial signal slot 110 on the signal disk 100 and the second positioning block 2222 is inserted into the signal slot 110 at the upper end of the signal disk 100, the second positioning block 2222 is released. Under the preload of the first elastic element 2224, the second positioning block 2222 abuts against the side of the signal groove 110 at the end facing the first positioning block 2212. At the same time, the initial signal groove 110 on the signal disk 100 abuts against the first positioning block 2212 on the side facing the second positioning block 2222, so that the signal disk 100 cannot rotate on the positioning seat 1. The signal disk 100 can only move slightly horizontally in its radial direction. This ensures that the angle between the positioning surface of the positioning key 32 and the side of the signal groove 110 that contacts the first positioning block 2212 is unique and will not change during the pressing process of the gear 200, thereby ensuring the accuracy of the timing angle after assembly.

[0065] In the above embodiment, the second positioning block 2222 and the signal slot 110 at the upper end of the signal disk 100 are fitted with a clearance, thereby facilitating the smooth insertion of the second positioning block 2222 into the signal slot 110 at the end during horizontal adjustment.

[0066] As some optional implementations, the fine-tuning device also includes a guide rod, which is horizontally positioned below the screw. One end of the guide rod is horizontally fixedly connected to the second positioning block, and the other end movably passes through the second fixed block, allowing the guide rod to move horizontally relative to the second fixed block. This configuration, through the cooperation of the guide rod and the screw, prevents the second positioning block from rotating, facilitating its insertion into the signal slot 110.

[0067] As some preferred embodiments, a mounting groove 11 for installing the second positioning component 3 is provided at the center of the top surface of the positioning base 1. Two third positioning pins 111 are provided at equal intervals around the central axis of the mounting groove 11 on the bottom surface of the mounting groove 11. The two third positioning pins 111 are used for positioning and connecting with the positioning shaft 31. The line connecting the two third positioning pins 111 is perpendicular to the positioning surface of the positioning key 32. By adopting the above technical solution, by opening an installation groove 11 on the positioning seat 1, on the one hand, it is necessary to install the mounting seat 311 described below, and on the other hand, it is convenient to set two third positioning pins 111 in the installation groove 11 to first fix the position of the positioning shaft 31 in the installation groove 11. At the same time, based on the position of the two third positioning pins 111 on the positioning shaft 31, it is convenient to process the positioning key 32, so that the positioning surface of the positioning key 32 is at 90° with the center line connecting the two third positioning pins 111. In this way, the position of the positioning key 32 on the positioning seat 1 is determined. When setting the second positioning component 3, the angle between the reference positioning component 221 and the positioning key 32 can be determined more easily, which facilitates the manufacturing of the entire pressing device.

[0068] To enable easy press-fitting of gear 200 with signal disk 100, this embodiment of the invention further includes a pressing mechanism 4. The pressing mechanism 4 includes a pressing seat 41 and a floating device 42. The pressing seat 41 has a mounting cavity 412 with an opening at the top. The positioning seat 1 is disposed within the mounting cavity 412. The floating device 42 is disposed within the mounting cavity 412 and connected to the positioning seat 1. The positioning seat 1 can move up and down along the mounting cavity 412 via the floating device 42. The outer diameter of the positioning seat 1 is smaller than the outer diameter of the signal disk 100. The top of the pressing seat 41 has an annular step 411.

[0069] Using the above technical solution, when pressing the gear 200 and signal disk 100, due to the action of the floating device 42, the positioning seat 1 extends into the top surface of the pressing seat 41, and at the same time, the top surface of the positioning seat 1 is higher than the top surface of the annular step 411. The signal disk 100 is placed horizontally on the positioning seat 1 and positioned by the first positioning component 2. After the gear 200 is positioned with the signal disk 100 by the second positioning component 3, the pressing head of the pressing equipment presses the gear 200. The gear 200, signal disk 100 and positioning seat 1 move downward relative to the mounting cavity 412 in sync. When the signal disk 100 falls on the annular step 411, the gear 200 continues to press down, so that the signal disk 100 can be embedded in the mounting groove 230 of the gear 200.

[0070] In the above embodiment, by setting the annular step 411, it is convenient to fit the mounting groove 230 onto the outer circumferential surface of the annular step 411 after the signal disk 100 is fully pressed into the inner end face of the mounting groove 230 of the gear 200. By making the outer diameter of the annular step 411 smaller than the outer diameter of the signal disk 100, it is possible to avoid the annular step 411 from getting stuck with the side wall of the mounting groove 230 after entering the mounting groove 230.

[0071] In some preferred embodiments, a mounting base 311 connected to the positioning seat 1 is fixedly provided at the lower end of the positioning shaft 31. The top surface of the mounting base 311 is at least as high as the thickness of the signal disk 100 as the top surface of the positioning seat 1. With this technical solution, during the positioning stage, the outer circle of the signal disk 100 and the guide cone surface and mounting groove 230 of the gear 200 do not make pre-contact, thus avoiding damage and deformation of the signal disk 100 caused by the gear 200 and ensuring the flatness of the signal disk 100.

[0072] It is worth noting that, in order to facilitate the pressing of gear 200 and signal disk 100, a guide cone surface is provided at the bottom edge of the mounting groove 230 of gear 200 to facilitate its guiding function.

[0073] The floating device 42 of the present invention includes a bolt 421 and a second elastic element 422. The second elastic element 422 is disposed in the mounting cavity 412. The upper end of the second elastic element 422 abuts against the bottom end of the positioning seat 1, and the lower end of the second elastic element 422 abuts against the inner bottom surface of the mounting cavity 412. The bolt 421 moves vertically upward into the mounting cavity 412 and passes through the second elastic element 422. The upper end of the bolt 421 is fixedly connected to the bottom end of the positioning seat 1. Using the above technical solution, when the positioning seat 1 moves downward relative to the pressing seat 41, it compresses the second elastic element 422. At the same time, the positioning seat 1 drives the bolt 421 to move downward. After the pressing process of the gear 200 and the signal disk 100 is completed, the pressing force is released. Under the pre-tightening force of the second elastic element 422, the positioning seat 1 moves upward and extends out of the top surface of the annular step 411, facilitating the next pressing operation.

[0074] The present invention also discloses a method for press-fitting a signal disk 100 and a gear 200, utilizing the aforementioned press-fitting device for the signal disk 100 and the gear 200, as shown in the attached drawing. Figure 9-11 As shown, the operation steps are as follows:

[0075] S1. Place the signal disk 100 horizontally on the top surface of the positioning seat 1, and make the mounting holes 120 on the signal disk 100 respectively fit onto the first positioning pin 211 and the second positioning pin 212. At the same time, insert the first positioning block 2212 into the initial signal groove 110 on the signal disk 100, and insert the second positioning block 2222 into the signal groove 110 at the end of the signal disk 100, thus completing the angular positioning of the signal disk 100 on the positioning seat 1 relative to the positioning key 32.

[0076] S2. The center hole 210 of the gear 200 is fitted onto the positioning shaft 31, and the positioning key 32 is connected to the keyway 220 of the gear 200, so that the gear 200 and the signal disk 100 can complete the timing angle positioning on the positioning seat 1.

[0077] In step S2, the mounting groove 230 of the gear 200 can be heated and expanded so that the diameter of the mounting groove 230 is larger than the outer diameter of the signal disk, which facilitates press-fitting.

[0078] S3. The gear 200 is pressed down by the pressure head of the pressing equipment. The gear 200, the positioning seat 1 and the signal disk 100 move downwards synchronously relative to the pressing seat 41. When the signal disk 100 contacts the top surface of the annular step 411, the signal disk 100 stops moving downwards and continues to press down the gear 200. The gear 200 and the positioning seat 1 move downwards synchronously relative to the pressing seat 41 until the inner end face of the gear 200 is tightly attached to the upper end face of the signal disk 100. The pressure is maintained for a certain period of time to complete the pressing operation of the signal disk 100 and the gear 200.

[0079] Through the above-described pressing method, during the initial pressing process, the gear 200 presses down on the positioning seat 1, causing the positioning seat 1 to drive the signal disk 100 to move downward synchronously. At this time, no pressing force occurs between the gear 200 and the signal disk 100, which can prevent the gear 200 from being subjected to force on the signal disk 100 and causing planar deformation. When the signal disk 100 is in horizontal contact with the top surface of the annular step 411, since the top surface of the mounting seat 311 is higher than the top surface of the signal disk 100, and since the bottom end of the gear 200 is in contact with the top surface of the mounting seat 311, the gear 200 is installed at this time... The recess 230 does not contact the signal disk 100. Only when the gear 200 continues to press down, the mounting base 311 presses down the positioning base 1. The positioning base 1 moves downward relative to the pressing base 41. At this time, the guide cone surface of the bottom surface of the mounting recess 230 of the gear 200 will contact the outer peripheral surface of the signal disk 100. Under the action of the coarse positioning device 21, the signal disk 100 will be guided into the mounting recess 230 through the guide cone surface until the top surface of the signal disk 100 abuts against the inner end surface of the mounting recess 230, thus completing the pressing operation between the signal disk 100 and the gear 200.

[0080] This invention utilizes the aforementioned pressing device to perform the pressing operation of the signal disk 100 and the gear 200. On the one hand, it can ensure the concentricity of the signal disk 100 and the gear 200 after pressing. On the other hand, through the cooperation of the positioning key 32 and the precision positioning device 22, the keyway 220 of the gear 200 and the signal groove 110 on the signal disk 100 are angularly positioned. This can ensure the accuracy of the timing angle after the signal disk 100 and the gear 200 are pressed. At the same time, during the pressing process, it can prevent the gear 200 and the signal disk 100 from deforming during the positioning stage, thereby ensuring the flatness of the signal disk 100.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A signal disk and gear pressing device, characterized in that, include: The positioning seat (1) has a cylindrical structure; The first positioning component (2) includes a coarse positioning device (21) and a fine positioning device (22) disposed on the top surface of the positioning seat (1). The coarse positioning device (21) is used to coarsely position the signal disk (100) on the top surface of the positioning seat (1), and the fine positioning device (22) is used to perform angular positioning on the signal groove (110) on the signal disk (100). The second positioning component (3) includes a positioning shaft (31) and a positioning key (32). The positioning shaft (31) is fixedly installed at the center of the top surface of the positioning seat (1) and is used to position the center hole (210) of the gear (200). The positioning key (32) is fixedly installed on the positioning shaft (31) and is used to cooperate with the precision positioning device (22) so that the keyway (220) on the center hole (210) of the gear (200) and the signal groove (110) on the signal disk (100) are angularly positioned. The coarse positioning device (21) includes a first positioning pin (211) and a second positioning pin (212) fixedly disposed on the top surface of the positioning seat (1). The first positioning pin (211) and the second positioning pin (212) are spaced apart around the center of the positioning seat (1). The first positioning pin (211) and the second positioning pin (212) are respectively used to coarsely position the mounting hole (120) on the signal disk (100). The first positioning pin (211) and the second positioning pin (212) are both clearance-fitted with the mounting hole (120). The precision positioning device (22) includes a reference positioning component (221) and a fine-tuning device (222) that are fixedly disposed around the circumference of the positioning base (1) at the edge of the top surface of the positioning base (1); The reference positioning component (221) includes a first fixing block (2211) and a first positioning block (2212). The first fixing block (2211) is fixedly disposed on the top surface of the positioning seat (1), and the first positioning block (2212) is fixedly disposed on the top surface of the first fixing block (2211) for insertion into the initial signal slot (110) on the signal disk (100). The angle between the positioning surface of the positioning key (32) and the positioning surface of the first positioning block (2212) is the timing angle after the gear (200) and the signal disk (100) are assembled. The fine-tuning device (222) includes a second fixing block (2221), a second positioning block (2222), a screw (2223), and a first elastic element (2224). The second fixing block (2221) is fixedly mounted on a positioning seat (1) on one side of the first fixing block (2211). The second positioning block (2222) is located on the side of the second fixing block (2221) facing the first fixing block (2211). One end of the screw (2223) is horizontally fixedly connected to the second positioning block (2222), and the other end moves through the second fixing block (2222). 21) and connected with fasteners (2225), the screw (2223) can move horizontally relative to the second fixing block (2221), the first elastic element (2224) is sleeved on the screw (2223) between the second positioning block (2222) and the second fixing block (2221), the upper end of the second positioning block (2222) is used to insert into the signal groove (110) at the upper end of the signal disk (100), and the second positioning block (2222) and the first positioning block (2212) cooperate with each other to make the signal disk (100) precisely positioned on the positioning block.

2. The signal disk and gear pressing device as described in claim 1, characterized in that: The fine-tuning device (222) also includes a guide rod (2226), which is horizontally arranged below the screw (2223). One end of the guide rod (2226) is horizontally fixedly connected to the second positioning block (2222), and the other end moves through the second fixing block (2221). The guide rod (2226) can move horizontally relative to the second fixing block (2221).

3. The signal disk and gear pressing device as described in claim 1, characterized in that: The first positioning block (2212) and the initial signal slot (110) on the signal disk (100) are in clearance fit, and the second positioning block (2222) and the signal slot (110) at the end of the signal disk (100) are in clearance fit.

4. The signal disk and gear pressing device as described in claim 1, characterized in that: The positioning seat (1) has an installation groove (11) for installing the second positioning component (3) at the center of the top surface. Two third positioning pins (111) are equally spaced around the central axis of the mounting groove (11) on the bottom surface of the mounting groove (11). The two third positioning pins (111) are used to position and connect with the positioning shaft (31). The line connecting the two third positioning pins (111) is perpendicular to the positioning surface of the positioning key (32).

5. The signal disk and gear pressing device as described in claim 1, characterized in that: It also includes a pressing mechanism (4), which includes a pressing seat (41) and a floating device (42). The pressing seat (41) has a mounting cavity (412) with an opening at the top. The positioning seat (1) is disposed in the mounting cavity (412). The floating device (42) is disposed in the mounting cavity (412) and connected to the positioning seat (1). The positioning seat (1) can move up and down along the mounting cavity (412) through the floating device (42). The outer diameter of the positioning seat (1) is smaller than the outer diameter of the signal disk (100). The top of the pressing seat (41) has an annular step (411). The outer diameter of the annular step (411) is smaller than the outer diameter of the signal disk (100).

6. The signal disk and gear pressing device as described in claim 5, characterized in that: The lower end of the positioning shaft (31) is also fixedly provided with a mounting base (311) connected to the positioning seat (1), and the top surface of the mounting base (311) is at least as high as the thickness of a signal disk (100) as the top surface of the positioning seat (1).

7. The signal disk and gear pressing device as described in claim 5, characterized in that: The floating device (42) includes a bolt (421) and a second elastic element (422). The second elastic element (422) is disposed in the mounting cavity (412). The upper end of the second elastic element (422) abuts against the bottom end of the positioning seat (1), and the lower end of the second elastic element (422) abuts against the inner bottom surface of the mounting cavity (412). The bolt (421) moves vertically upward into the mounting cavity (412) and passes through the second elastic element (422). The upper end of the bolt (421) is fixedly connected to the bottom end of the positioning seat (1).

8. A method for pressing a signal disk and a gear together, utilizing the signal disk and gear pressing device as described in any one of claims 5-7, characterized in that, The following steps are included: S1. Place the signal disk (100) horizontally on the top surface of the positioning seat (1), and make the mounting holes (120) on the signal disk (100) respectively fit onto the first positioning pin (211) and the second positioning pin (212). At the same time, insert the first positioning block (2212) into the initial signal groove (110) on the signal disk (100), and insert the second positioning block (2222) into the signal groove (110) at the end of the signal disk (100), thus completing the angular positioning of the signal disk (100) with the positioning key (32) on the positioning seat (1). S2. The center hole (210) of the gear (200) is fitted onto the positioning shaft (31), and the positioning key (32) is connected to the keyway (220) of the gear (200) to realize the timing angle positioning of the gear (200) and the signal disk (100) on the positioning seat (1); S3. Press down the gear (200) with the press head of the press-fitting equipment. The gear (200), positioning seat (1) and signal disk (100) move down synchronously relative to the press-fitting seat (41). When the signal disk (100) contacts the top surface of the annular step (411), the signal disk (100) stops moving down and continues to press down the gear (200). The gear (200) and positioning seat (1) move down synchronously relative to the press-fitting seat (41) until the inner end face of the gear (200) is pressed tightly against the upper end face of the signal disk (100). Hold the pressure for a certain period of time to complete the press-fitting operation of the signal disk and the gear.

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