Press fitting clamp for intermediate shaft assembly
By designing a press-fit fixture for the intermediate shaft assembly and utilizing the principle of amplifying levers and inductive proximity switches, the problem of insufficient detection accuracy of inductive proximity switches was solved, enabling accurate detection of gears placed in either direction and improving processing efficiency and reliability.
Patent Information
- Application Number
- CN202422942636.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing inductive proximity switches have limited accuracy in detecting whether gears are placed in the correct orientation, making it difficult to make accurate judgments and leading to misjudgments or wasted time during the manufacturing process.
A press-fit fixture for intermediate shaft assembly was designed. It combines the principle of amplifying levers with an inductive proximity switch. Through the cooperation of the sliding pin and the pressure rod, it amplifies the distance change when the gear is reversed, thereby achieving accurate detection.
It improves the reliability of gear detection by reversing the orientation, avoids misjudgment, reduces detection costs, and does not add any additional clamping or detection steps.
Smart Images
Figure CN223492545U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gear processing technology, specifically to a press-fit fixture for intermediate shaft components. Background Technology
[0002] When machining gear shaft parts, a fixture is used to clamp both ends of the gear shaft part for machining. The gear is fitted onto the intermediate shaft part. Before machining, it is often necessary to use some tools to determine whether the gear part is placed in reverse. If it is placed in reverse, not only will a machined part be lost, but machining time will also be wasted. Therefore, in practice, an inductive proximity switch is set on the fixture for distance detection. The distance between the gear surface and the switch is detected to determine whether it is placed in reverse. When the workpiece is placed in reverse, the distance between the end face of the workpiece and the end face of the proximity switch is less than the preset adjustment height. At this time, the proximity switch transmits an electrical signal. If it is placed in reverse, the switch is off and machining is not allowed. However, the sensing accuracy of existing inductive proximity switches is limited. The distance difference for some gears placed in reverse is small, making it difficult to accurately determine the orientation of some gear workpieces. Therefore, a press-fit fixture that can accurately prevent errors and facilitate gear machining is needed. Utility Model Content
[0003] The present invention aims to provide a press-fit fixture for intermediate shaft assemblies, which can accurately prevent errors and facilitate gear machining.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: an intermediate shaft assembly press-fit fixture, including a mounting base and a top clamping part that can drive the gear close to the mounting base. The mounting base includes a base part and a sliding seat slidably disposed within the base part. The top clamping part includes a pressure plate and a telescopic pin disposed on the pressure plate. An anti-misalignment part is provided on one side of the base part. The anti-misalignment part includes an inductive proximity switch, a pressure rod, and a sliding pin. The side of the pressure rod near the gear is hinged to the base part. The pressure rod can swing back and forth around the hinge point. The end of the pressure rod near the gear is opposite to the gear. The sliding pin can slide back and forth and abut against the other end of the pressure rod. The inductive proximity switch can detect the distance before and after the sliding pin slides.
[0005] The beneficial effects of this plan are:
[0006] In use, the two ends of the intermediate shaft are respectively limited by the top clamp and the mounting base. The top clamp moves towards the mounting base to clamp the intermediate shaft. The gear is fitted onto the intermediate shaft. During the sliding of the top clamp, the intermediate shaft drives the gear to approach the base. The end of the pressure rod near the gear is opposite to the gear, and the gear presses against one end of the pressure rod. In this technical solution, the sliding pin reciprocates and abuts against the other end of the pressure rod. The side of the pressure rod near the gear is hinged to the base to form an amplifying lever. The inductive proximity switch can detect whether the gear is installed backwards by detecting the sliding distance of the sliding pin. Traditional detection... In traditional testing methods, if the distance difference between the inverted and upright end faces of a gear is less than 0.1mm, the inductive proximity switch will have difficulty detecting whether the gear is in reverse. This technical solution uses an amplifying lever. The end of the lever closest to the gear changes a small distance, while the other end changes a large distance around the hinge point under the lever's influence. This allows the inductive proximity switch to detect whether the gear is in reverse. Even if the difference between the inverted and upright end faces is extremely small, the amplified distance change is large enough for the inductive proximity switch to detect it, avoiding the inability to detect due to small distance differences in traditional testing methods, thus improving the reliability of the equipment. Furthermore, the error-proofing component is integrated with the fixture, eliminating the need for additional clamping or testing steps. Additionally, the inductive proximity switch, lever, and sliding pin are common mechanical and electronic components with low design and manufacturing costs. Using image recognition or similar methods would significantly increase costs.
[0007] Preferably, as an improvement, it also includes a first spring sleeved on the sliding pin, the sliding pin being slidably disposed on the base portion, a sliding disk being fixed on the upper surface of the sliding pin, the sliding disk being located below the end of the pressure rod, the two ends of the first spring being abutted against the sliding disk and the base portion respectively, and an inductive proximity switch being disposed at the bottom of the sliding pin.
[0008] The beneficial effects are as follows: the sliding disk is located below the end of the pressure rod, and the two ends of the first spring abut against the sliding disk and the base respectively, so that the sliding disk is always in contact with the end of the pressure rod. Under the elastic support of the first spring, the upper surface of the sliding disk is always in contact with the end of the pressure rod. The inductive proximity switch is set at the bottom of the sliding pin to sense the distance difference between the front and back of the sliding pin. The sliding disk increases the contact area of the end of the pressure rod, so that the sliding disk and the end of the pressure rod can maintain a good contact for a long time, avoiding the detection failure caused by the misalignment of the sliding pin and the end of the pressure rod during the swing of the pressure rod.
[0009] Preferably, as an improvement, the base includes a base plate, a second spring, and a mounting seat. The mounting seat is fixed to the base plate, and a first sliding hole is opened in the mounting seat. The bottom of the sliding seat is slidably disposed in the first sliding hole. The two ends of the second spring abut against the base plate and the bottom of the sliding seat, respectively. The upper surface of the sliding seat has a mounting groove.
[0010] The beneficial effects are as follows: When in use, one end of the intermediate shaft is inserted into the mounting groove, and the telescopic ejector pin slides into the other end of the intermediate shaft to form an initial limit on the intermediate shaft. The top clamp then moves further downward, and the gear is sleeved on the intermediate shaft. The intermediate shaft slides downward under the drive of the top clamp, causing the sliding seat to slide downward until the gear comes close to the upper surface of the mounting seat to fix the gear. At the same time, the gear presses the pressure rod for detection. The mounting groove can ensure stable limiting of the end of the intermediate shaft and avoid displacement during clamping.
[0011] Preferably, as an improvement, strip blocks are fixed at both ends of the pressure rod, and the two end faces of the strip blocks are hemispherical. During the rotation of the pressure rod, the end faces of the corresponding strip blocks contact the gear or sliding disk.
[0012] The beneficial effects are: the hemispherical end face can automatically adjust the contact angle to achieve the best contact state within the swing range of the pressure rod, while reducing frictional loss between mechanical parts.
[0013] Preferably, as an improvement, the bottom of the sliding pin is threaded with a nut.
[0014] The beneficial effect is to prevent the sliding pin from falling off during the reciprocating sliding process.
[0015] Preferably, as an improvement, it also includes a ejector seat, which has a second sliding hole. The upper end of the telescopic ejector is slidably connected to the second sliding hole. The surface of the telescopic ejector near the base plate is a conical surface. The ejector seat is fixed on the pressure plate.
[0016] The beneficial effect is that the tapered surface of the telescopic ejector pin can guide the intermediate shaft, so that the axis of the intermediate shaft and gear parts are aligned with the axis of the ejector pin, which facilitates subsequent processing.
[0017] Preferably, as an improvement, the pressure plate is also provided with a hydraulic cylinder that can push the pressure plate to slide back and forth.
[0018] Preferably, as an improvement, the upper surface of the mounting base has a movable groove for the end of the pressure rod to swing. Attached Figure Description
[0019] Figure 1 This is a cross-sectional view of an embodiment of the present utility model;
[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle. Detailed Implementation
[0021] The following detailed description illustrates the specific implementation method:
[0022] The reference numerals in the accompanying drawings include: sliding seat 1, telescopic ejector pin 2, inductive proximity switch 3, pressure rod 4, sliding pin 5, gear 6, intermediate shaft 7, first spring 8, sliding disc 9, base plate 10, second spring 11, mounting seat 12, first sliding hole 13, strip block 14, nut 15, second sliding hole 16, movable groove 17, pressure plate 18, ejector pin seat 19.
[0023] Example
[0024] The implementation examples are basically as follows Figures 1-2 As shown, Figure 1 The intermediate shaft 7 assembly press-fit fixture shown includes a mounting base and a top clamping part that can drive the gear 6 close to the mounting base. The mounting base includes a base part and a sliding seat 1 slidably disposed within the base part. The top clamping part includes a pressure plate 18 and a telescopic ejector pin 2 disposed on the pressure plate 18. An anti-misalignment part is provided on one side of the base part, which includes an inductive proximity switch 3, a pressure rod 4, and a sliding pin 5. The side of the pressure rod 4 near the gear 6 is hinged to the base part. The pressure rod 4 can reciprocate around the hinge point. The end of the pressure rod 4 near the gear 6 is opposite to the gear 6. The sliding pin 5 can reciprocate and abut against the right end of the pressure rod 4. The inductive proximity switch 3 can detect the distance of the sliding pin 5 before and after sliding. In use, the two ends of the intermediate shaft 7 are respectively limited on the top clamp and the mounting base. The top clamp moves closer to the mounting base to clamp the intermediate shaft 7. The gear 6 is sleeved on the intermediate shaft 7. During the sliding process of the top clamp, the intermediate shaft 7 drives the gear 6 to approach the base. The end of the pressure rod 4 near the gear 6 is opposite to the gear 6. The gear 6 presses on the left end of the pressure rod 4. In this technical solution, the sliding pin 5 slides back and forth and abuts against the right end of the pressure rod 4. The side of the pressure rod 4 near the gear 6 is hinged to the base to form an amplifying lever. The inductive proximity switch 3 can detect the sliding distance of the sliding pin 5 to determine whether the gear 6 is placed in reverse.
[0025] It also includes a first spring 8 sleeved on the sliding pin 5. The sliding pin 5 is slidably mounted on the base. A sliding disk 9 is fixed on the upper surface of the sliding pin 5. The sliding disk 9 is located below the end of the pressure rod 4. A nut 15 is threadedly connected to the bottom of the sliding pin 5 to prevent the sliding pin 5 from falling off during the reciprocating sliding process. The two ends of the first spring 8 abut against the sliding disk 9 and the base respectively. An inductive proximity switch 3 is set at the bottom of the sliding pin 5. Under the elastic support of the first spring 8, the upper surface of the sliding disk 9 is always in contact with the end of the pressure rod 4. The inductive proximity switch 3 is set at the bottom of the sliding pin 5 to sense the distance difference between the front and back of the sliding pin 5. The sliding disk 9 increases the contact area of the end of the pressure rod 4, so that the sliding disk 9 and the end of the pressure rod 4 can maintain a continuous good contact for a long time, avoiding the detection failure caused by the misalignment of the sliding pin 5 and the end of the pressure rod 4 during the swing of the pressure rod 4.
[0026] The base includes a base plate 10, a second spring 11, and a mounting seat 12. The mounting seat 12 is fixed to the base plate 10. A first sliding hole 13 is opened in the mounting seat 12. The bottom of the sliding seat 1 is slidably disposed in the first sliding hole 13. The two ends of the second spring 11 abut against the bottom of the base plate 10 and the sliding seat 1, respectively. A mounting groove is opened on the upper surface of the sliding seat 1. The maximum diameter of the intermediate shaft 7 is smaller than the diameter of the first sliding hole 13. In use, the lower end of the intermediate shaft 7 is inserted into the mounting groove, and the telescopic pin 2 slides into the upper end of the intermediate shaft 7 to form an initial limit on the intermediate shaft 7. The top clamp moves further downward, and the gear is sleeved on the intermediate shaft 7. The intermediate shaft 7 slides downward under the drive of the top clamp, causing the sliding seat 1 to slide downward until the gear comes close to the upper surface of the mounting seat 12 to fix the gear 6. At the same time, the gear 6 presses the pressure rod 4 for detection. The mounting groove can ensure stable limiting of the end of the intermediate shaft 7 and prevent displacement during clamping. Figure 2 In this embodiment, both ends of the pressure rod 4 are welded and fixed or integrally formed with strip blocks 14. The upper and lower end faces of the strip blocks 14 are hemispherical. During the rotation of the pressure rod 4, the corresponding end face of the strip block 14 contacts the gear 6 or the sliding disk 9. The hemispherical end face can automatically adjust the contact angle to achieve the best contact state within the swing range of the pressure rod 4, while reducing frictional loss between mechanical parts. The upper surface of the mounting base 12 has a movable groove 17 for the end of the pressure rod 4 to swing.
[0027] It also includes a ejector seat 19, which has a second sliding hole 16. The upper end of the telescopic ejector 2 is slidably connected to the second sliding hole 16. The surface of the telescopic ejector 2 near the base plate 10 is a tapered surface. The tapered surface of the telescopic ejector 2 can guide the intermediate shaft 7, so that the axis of the intermediate shaft 7 and the gear component is aligned with the axis of the ejector, which facilitates subsequent processing. In this embodiment, the ejector seat 19 is fixed on the pressure plate 18. The pressure plate 18 is also provided with a hydraulic cylinder that can push the pressure plate 18 to slide back and forth. When installing the intermediate shaft 7 in this technical solution, firstly as follows... Figure 1 As shown, the telescopic pin 2 and sliding seat 1 of the intermediate shaft 7 are initially limited and fixed to the intermediate shaft 7. Then, the hydraulic cylinder drives the pressure plate 18 to slide downward. The pressure plate 18 drives the top clamp to slide downward as a whole. At this time, the sliding seat 1 slides downward. The gear 6 installed on the intermediate shaft 7 gradually approaches the upper surface of the mounting seat 12 under the drive of the intermediate shaft 7 until the gear 6 contacts the pressure rod 4 and lifts the pressure rod 4.
[0028] The specific implementation process is as follows:
[0029] In use, the two ends of the intermediate shaft 7 are respectively limited on the top clamp and the mounting base. The top clamp moves closer to the mounting base to clamp the intermediate shaft 7. The gear 6 is sleeved on the intermediate shaft 7. During the sliding process of the top clamp, the intermediate shaft 7 drives the gear 6 to approach the base. The end of the pressure rod 4 near the gear 6 is opposite to the gear 6. The gear 6 presses on the left end of the pressure rod 4. In this technical solution, the sliding pin 5 slides back and forth and abuts against the right end of the pressure rod 4. The side of the pressure rod 4 near the gear 6 is hinged to the base to form an amplifying lever. The inductive proximity switch 3 can detect the sliding distance of the sliding pin 5 to determine whether the gear 6 is placed in reverse. In traditional detection methods, if the distance difference between the reversed and upright ends of gear 6 is less than 0.1mm, the inductive proximity switch 3 will have difficulty detecting whether it is reversed. In this technical solution, an amplifying lever is formed. The end of the pressure rod 4 near gear 6 changes a small distance, while the other end of the pressure rod 4 changes a large distance around the hinge point under the action of the lever. The inductive proximity switch 3 can determine whether the gear is reversed. Even if the difference between the upright and reversed ends of gear 6 is extremely small, the amplified distance change is large enough for the inductive proximity switch 3 to detect it, avoiding the situation in traditional detection where the distance difference is too small to determine, thus improving the reliability of the equipment detection. Moreover, the error prevention part is integrated with the fixture, without adding additional clamping or detection steps. In addition, the inductive proximity switch 3, pressure rod 4, and sliding pin 5 are all common mechanical and electronic components with low design and manufacturing costs. If image recognition or other methods are used, the cost will increase significantly.
[0030] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A press-fit fixture for intermediate shaft assembly, characterized in that: The device includes a mounting base and a top clamp that can drive a gear to approach the mounting base. The mounting base includes a base part and a sliding seat that is slidably disposed within the base part. The top clamp includes a pressure plate and a telescopic pin disposed on the pressure plate. An anti-misoperation part is provided on one side of the base part. The anti-misoperation part includes an inductive proximity switch, a pressure rod, and a sliding pin. The side of the pressure rod near the gear is hinged to the base part. The pressure rod can swing back and forth around the hinge point. The end of the pressure rod near the gear is opposite to the gear. The sliding pin can slide back and forth and abut against the other end of the pressure rod. The inductive proximity switch can detect the distance before and after the sliding pin slides.
2. The intermediate shaft assembly press-fit fixture according to claim 1, characterized in that: It also includes a first spring sleeved on the sliding pin, the sliding pin is slidably mounted on the base, a sliding disk is fixed on the upper surface of the sliding pin, the sliding disk is located below the end of the pressure rod, the two ends of the first spring abut against the sliding disk and the base respectively, and an inductive proximity switch is mounted at the bottom of the sliding pin.
3. The intermediate shaft assembly press-fit fixture according to claim 2, characterized in that: The base includes a base plate, a second spring, and a mounting seat. The mounting seat is fixed to the base plate and has a first sliding hole. The bottom of the sliding seat is slidably disposed in the first sliding hole. The two ends of the second spring abut against the base plate and the bottom of the sliding seat, respectively. The upper surface of the sliding seat has a mounting groove.
4. The intermediate shaft assembly press-fit fixture according to claim 3, characterized in that: Both ends of the pressure rod are fixed with strip blocks, and the two end faces of the strip blocks are hemispherical. During the rotation of the pressure rod, the end face of the corresponding strip block contacts the gear or sliding disk.
5. The intermediate shaft assembly press-fit fixture according to claim 4, characterized in that: The sliding pin has a nut connected to its bottom thread.
6. The intermediate shaft assembly press-fit fixture according to claim 5, characterized in that: It also includes a ejector seat, which has a second sliding hole. The upper end of the telescopic ejector is slidably connected to the second sliding hole. The surface of the telescopic ejector near the base plate is a conical surface. The ejector seat is fixed on the pressure plate.
7. The intermediate shaft assembly press-fit fixture according to claim 6, characterized in that: The pressure plate is also equipped with a hydraulic cylinder that can push the pressure plate to slide back and forth.
8. The intermediate shaft assembly press-fit fixture according to claim 7, characterized in that: The upper surface of the mounting base has a movable groove for the end of the pressure rod to swing.