Wound key pressing and checking equipment

Abstract

The invention relates to the technical field of assembly, in particular to woodruff key press fit and inspection equipment which comprises a base, a shaft sleeve, a shaft sleeve, a shaft sleeve and a shaft sleeve. The ejector rod is arranged on the base in a sliding mode, and the head of the ejector rod extends into the base; the rotating shaft is rotationally arranged on the base; the cam is connected outside the rotating shaft and presses the tail part of the ejector rod; when the rotating shaft rotates, the cam can drive the ejector rod to press the woodruff key into the key groove. A'cam-ejector rod 'transmission structure is adopted, rotating motion of the rotating shaft is converted into uniform linear motion of the ejector rod, the magnitude of pressing force is accurately controlled through the profile of the cam, the problem of'uncontrollable force' of traditional manual hammering is thoroughly solved, and'uneven two ends' and'out-of-tolerance parallelism 'caused by uneven stress of a woodruff key can be avoided; and'improper pressing 'or'overpressure fracture' is also prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of assembly, in particular to a semi-circular key pressing and checking device. BACKGROUND

[0002] At present, the keys commonly used in motors are flat keys and semi-circular keys. When the motor bearing needs to bear a large torque or impact load, we usually choose a semi-circular key. However, since the bottom of the semi-circular key in contact with the shaft extension key groove is in an arc shape, during the assembly process, the semi-circular key often appears to be uneven at both ends, which makes it difficult to control the parallelism of the semi-circular key after assembly. In addition, the key and the key groove are matched with a small interference, and the key needs to be assembled into the key groove by knocking. The knocking will generate a radial impact force on the shaft extension and the bearing, especially for non-standard lengthened shaft extension motors, which is easy to cause the shaft extension to bend and jump out of tolerance, and the radial impact force is easy to cause the bearing to make abnormal noise, and even damage. This assembly method has a large labor intensity, low assembly efficiency, and seriously affects the quality of the motor. SUMMARY

[0003] The present application provides a semi-circular key pressing and checking device to solve the problems in the prior art, and the specific technical solutions are as follows: A semi-circular key pressing and checking device, comprising: a base, the base has a work groove for inserting a shaft extension; a top rod, which is slidably arranged on the base, the head of the top rod extends into the base; a rotating shaft, which is rotatably arranged on the base; and a cam, which is connected to the outside of the rotating shaft and presses the tail of the top rod; When the rotating shaft rotates, the cam can drive the top rod to press the semi-circular key into the key groove.

[0004] As a further technical solution of the present application, a grommet matching the shaft extension is embedded in the work groove to guide the insertion of the shaft extension into the work groove.

[0005] As a further technical solution of the present application, a permanent magnet is arranged on the head of the top rod, which is used to adsorb and maintain the posture of the semi-circular key before pressing, and the magnetic attraction effect is used to check the pressing effect of the semi-circular key after pressing.

[0006] As a further technical solution of the present application, a handle is connected to the end of the rotating shaft, and the handle can drive the rotating shaft to rotate when it swings.

[0007] As a further technical solution of the present application, a spring one is arranged between the top rod and the base, which is compressed when the top rod presses the semi-circular key, and the spring one can drive the top rod to reset after compression to facilitate multiple pressing.

[0008] As a further technical solution of the present invention, a positioning buckle is rotatably provided on the base. The positioning buckle has a positioning end and a driving end relative to the rotation center. A spring is connected between one end of the driving end and the base so that the positioning buckle deflects toward the positioning end under normal conditions. When the shaft extension is inserted into the slot, the positioning end can extend into the keyway to form a positioning.

[0009] As a further technical solution of the present invention, it also includes a slide rod, one end of which is connected to the top rod to move synchronously with the pressing, and the other end of which abuts against the driving end; during pressing, the slide rod pressing the driving end can drive the positioning buckle to deflect towards the driving end, so that the positioning end is disengaged from the keyway to prevent interference.

[0010] The beneficial effects of this invention are as follows: Employing a "cam-pushrod" transmission structure, the rotational motion of the shaft is converted into the uniform linear motion of the pushrod. The pressing force is precisely controlled by the cam profile, completely replacing the "uncontrollable force" problem of traditional manual hammering. This avoids unevenness and "parallelism deviation" caused by uneven force on the semi-circular key, and also prevents "incomplete pressing" or "overpressure breakage". During the pressing process, the pushrod outputs axial force, completely eliminating the "radial impact force" generated by traditional hammering. Especially for non-standard extended shaft motors, this can prevent "bending and running out of quality" caused by radial impact on the shaft extension. At the same time, it eliminates damage to the bearings by radial force, reduces bearing noise, jamming and other faults, and directly improves the operational stability and service life of the motor after assembly.

[0011] Before pressing, the permanent magnet at the top of the push rod can attract the semicircular key, forcing it to maintain the correct posture of "flat surface facing forward and arc facing backward," solving the problem of "semicircular key tilting / flipping" during manual placement and improving positioning efficiency. After pressing, the pressing effect can be judged by the magnetic attraction strength: when the semicircular key is fully in place, the distance between the permanent magnet and the semicircular key increases and the magnetic force weakens; when it is not in place, the magnetic force is still strong. There is no need to equip additional visual inspection or dimensional measurement equipment. The pressing qualification judgment can be completed within seconds, greatly reducing inspection costs and process complexity.

[0012] The positioning buckle and slide bar work together to achieve "automatic positioning + interference-free pressing". After the shaft extension is inserted into the slot, the positioning end of the positioning buckle automatically extends into the keyway under the action of the second spring, realizing "insertion and positioning" of the shaft extension without the need for manual clamping. During pressing, the slide bar moves synchronously with the push rod, automatically squeezing the driving end of the positioning buckle, so that the positioning end is disengaged from the keyway, completely avoiding "pressing interference caused by forgetting to release the positioning", simplifying the operation steps and reducing the risk of human error. Attached Figure Description

[0013] Figure 1 A three-dimensional structural schematic diagram of a semi-circular key pressing and inspection device is shown; Figure 2A schematic diagram of a planar structure for a semi-circular key pressing and inspection device is shown.

[0014] Figure descriptions: 100, base; 110, groove; 120, washer ring; 200, top rod; 210, permanent magnet; 300, rotating shaft; 310, handle; 400, cam; 500, spring one; 600, positioning buckle; 610, positioning end; 620, drive end; 700, slide rod; 800, spring two. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0016] Figure 1 and Figure 2 The present invention relates to a semi-circular key pressing and inspection device for assembling a semi-circular key into a keyway of a shaft extension, comprising: a base 100 having a groove 110 for inserting the shaft extension; a push rod 200 slidably mounted on the base 100, the head of the push rod 200 extending into the base 100; a rotating shaft 300 rotatably mounted on the base 100; and a cam 400 connected to the outside of the rotating shaft 300 and pressing against the tail of the push rod 200; when the rotating shaft 300 rotates, the cam 400 can drive the push rod 200 to press the semi-circular key into the keyway.

[0017] The base 100 provides a fixed support frame for the entire device, and the dimensions of its groove 110 match the dimensions of the shaft extension to be processed, thus defining the radial position of the shaft extension. The push rod 200 moves axially through a sliding hole on the base 100, with its head aligned with the keyway direction of the shaft extension within the groove 110. The cam 400 is rigidly connected to the rotating shaft 300, and the contour edge of the cam 400 always contacts the tail of the push rod 200. When the rotating shaft 300 rotates around its own axis, the eccentric structure of the cam 400 pushes the push rod 200 to slide forward axially. The head then presses the semi-circular key, which is pre-placed at the keyway entrance, into the keyway, completing the pressing action. Through the "cam-push rod" transmission structure, the rotational motion of the shaft is converted into the linear pressing motion of the push rod. Compared with traditional manual hammer pressing, it can achieve uniform and stable pressing force output, avoiding the problems of "uneven force causing deformation of the semi-circular key" or "incomplete pressing" during manual operation. At the same time, all components are integrated on the base 100, with a compact structure and small space occupation, which can be adapted to workshop assembly lines or on-site maintenance scenarios, improving the convenience of operation.

[0018] See also Figure 2 The groove 110 is fitted with a matching shaft extension washer 120 to guide the shaft extension into the groove 110.

[0019] The washer 120 is made of wear-resistant engineering plastic or copper alloy. Its inner diameter precisely matches the outer diameter of the shaft extension, and the axis of the washer 120 coincides with the axis of the groove 110. When the shaft extension is inserted into the groove 110, the inner wall of the washer 120 forms a radial constraint on the shaft extension, guiding it to be inserted along the fixed axis and preventing keyway misalignment due to insertion angle deviation. At the same time, the end face of the washer 120 fits against the stepped surface of the groove 110, which limits the insertion depth of the shaft extension and ensures that the keyway of the shaft extension is precisely aligned. The head of the push rod 200 serves two purposes. First, the guide ring 120 eliminates the need for repeated adjustments when inserting the shaft extension, improving the alignment efficiency between the keyway and the push rod 200 by more than 60% and significantly reducing the risk of misalignment of the semi-circular key due to alignment deviation. Second, the ring 120 isolates the shaft extension from the metal base 100, preventing direct friction between the shaft extension and the inner wall of the groove 110 during insertion, thus protecting the appearance and precision of the shaft extension. This is especially suitable for shaft extension components with chrome plating or precision machining.

[0020] See also Figure 2 The head of the push rod 200 is equipped with a permanent magnet 210. The permanent magnet 210 is used to attract and maintain the semi-circular key posture before pressing, and to check the pressing effect of the semi-circular key by using the magnetic attraction effect after pressing.

[0021] The permanent magnet 210 is made of neodymium iron boron strong magnetic material. Its adsorption surface is flush with the end face of the push rod 200, and the area of ​​the adsorption surface is slightly smaller than the plane area of ​​the semicircular key. Before pressing, the plane of the semicircular key is attached to the adsorption surface of the permanent magnet 210. The magnetic force of the permanent magnet can firmly attract the semicircular key, keeping it in the correct posture of "plane facing forward, arc facing backward," avoiding tilting or flipping of the semicircular key when placed manually. During pressing, the push rod 200 pushes the semicircular key into the keyway, and the permanent magnet 210 moves synchronously with the push rod until the semicircular key is completely pressed into the keyway, at which point the push rod 200 stops moving. At this time, if the semicircular key is... When the key is fully in place, the distance between the permanent magnet 210 and the semicircular key increases, and the magnetic force weakens significantly. If the semicircular key is not pressed in place, the permanent magnet and the semicircular key are still in close contact, and the magnetic force remains strong. This is used to determine whether the pressing is qualified. This solves the pain point of "difficult to control posture and easy to deviate" when the semicircular key is placed manually in the traditional way. The positioning accuracy of the semicircular key before pressing is improved to ±0.02mm. At the same time, the "pressing" and "inspection" functions are integrated into the head of the push rod 200. There is no need to equip additional visual inspection or dimensional measurement equipment. The qualification judgment after pressing can be completed within 1 second, which greatly improves processing efficiency and yield.

[0022] See also Figure 2 A handle 310 is connected to the end of the rotating shaft 300. When the handle 310 swings, it can drive the rotating shaft 300 to rotate.

[0023] The connection between the handle 310 and the rotating shaft 300 is rigidly fixed. The length of the handle 310 is 3-5 times the distance from the axis of the rotating shaft 300 to the end of the handle, forming a force-saving lever. During operation, the operator holds the end of the handle 310 and swings it away from the push rod 200. The handle will drive the rotating shaft 300 to rotate synchronously, thereby driving the cam 400 to push the push rod 200 to complete the pressing. Due to the lever principle, the force applied by the operator to the end of the handle is only 1 / 3 to 1 / 5 of the actual pressing force to achieve stable pressing.

[0024] See also Figure 2 A spring 500 is provided between the push rod 200 and the base 100. When the push rod 200 presses the semi-circular key, the spring 500 is compressed, and after the spring 500 is compressed, it can drive the push rod 200 to return to its original position, which is beneficial for multiple pressing.

[0025] Spring 500 is a cylindrical helical compression spring, which is sleeved between the middle step of the push rod 200 and the sliding hole step of the base 100. When the push rod 200 is pushed forward by the cam 400, the spring 500 is compressed by the pressure between the push rod step and the base step, storing elastic potential energy. After the compression is completed, the operator swings the handle 310 in the opposite direction, and the rotating shaft 300 drives the cam 400 to rotate. The pressure of the cam on the tail of the push rod 200 gradually decreases. At this time, the spring 500 releases its elastic potential energy and pushes the push rod 200 forward. 0 slides backward along the axis until the tail of the push rod re-fits the minimum radius of the cam 400, completing the reset; the automatic reset function of the spring-500 eliminates the need for the operator to manually pull back the push rod 200. After each pressing is completed, it can be directly inserted into the next shaft extension for processing, improving continuous operation efficiency by 50%; at the same time, the spring-500 can play a buffering role during the pressing process, preventing the push rod 200 from impacting the semi-circular key due to sudden force applied by the cam 400, reducing the micro-deformation of the semi-circular key caused by the impact, and protecting the precision of the semi-circular key.

[0026] See also Figure 2 A positioning buckle 600 is rotatably mounted on the base 100. The positioning buckle 600 has a positioning end 610 and a driving end 620 relative to the rotation center. A spring 800 is connected between one end of the driving end 620 and the base 100 so that the positioning buckle 600 deflects toward the positioning end 610 under normal conditions. When the shaft extension is inserted into the work groove 110, the positioning end 610 can extend into the keyway to form a positioning.

[0027] The positioning buckle 600 is rotatably connected to the base 100 via a pin. The shape of its positioning end 610 matches the shape of the keyway of the shaft extension. The end of the drive end 620 is provided with a hook for connecting the second spring 800. The second spring 800 is a tension spring, which is in a slightly stretched state under normal conditions. By pulling the drive end 620 towards the base 100, according to the lever principle, the positioning end 610 will deflect away from the base 100, forming a state of "positioning end lifted under normal conditions". When the shaft extension is inserted into the slot 110 and in place, the shaft extension... The keyway is precisely aligned with the positioning end 610. At this time, the positioning end 610 extends into the keyway under the tension of the second spring 800, forming a circumferential constraint on the shaft extension and preventing the shaft extension from rotating or moving axially during the pressing process. This achieves "insertion and positioning" of the shaft extension, eliminating the need for operators to use additional clamps to fix the shaft extension and simplifying the operation steps. At the same time, the depth of the positioning end 610 extending into the keyway can be adjusted by the tension of the second spring 800, ensuring both firm positioning and preventing difficulty in removing the shaft extension due to excessive tightness, thus balancing positioning reliability and operational convenience.

[0028] See also Figure 2 It also includes a slide bar 700, one end of which is connected to the top rod 200 to move synchronously with the pressing, and the other end of the slide bar 700 abuts against the drive end 620. When pressing, the slide bar 700 presses against the drive end 620, which can drive the positioning buckle 600 to deflect towards the drive end 620, so that the positioning end 610 is disengaged from the keyway to prevent interference.

[0029] The slide rod 700 is a cylindrical metal rod, one end of which is fixed to the middle of the push rod 200 by a screw, and the other end is machined with an arc-shaped pressing head, which is always in contact with the surface of the driving end 620 of the positioning buckle 600. When the push rod 200 is pushed forward by the cam 400, the slide rod 700 moves forward synchronously with the push rod, and its pressing head applies a forward thrust to the driving end 620. This thrust overcomes the tension of the spring 800, causing the positioning buckle 600 to deflect around the pin axis towards the driving end 620, and the positioning end 610 is lifted upwards, gradually disengaging from the keyway of the shaft extension. When the push rod 200... When pressing is completed, the positioning end 610 is completely disengaged from the keyway to avoid interference between the push rod and the positioning end when the push rod pushes the semi-circular key. After pressing is completed, the push rod 200 is reset under the action of the spring 500, the slide rod 700 moves backward with the push rod, the thrust on the drive end 620 disappears, the positioning latch 600 is reset under the action of the spring 800, and the positioning end 610 returns to the waiting position. The mechanical linkage between the pressing action and the positioning release action is realized through the slide rod 700, eliminating the need for the operator to manually control the positioning latch 600 and completely avoiding the risk of "forgetting to release the positioning and causing pressing interference".

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A device for pressing and inspecting semi-circular keys, characterized in that, include: A base (100) having a groove (110) for inserting a shaft extension. A push rod (200) is slidably mounted on a base (100), with the head of the push rod (200) extending into the base (100); A rotating shaft (300) is rotatably mounted on a base (100); And the cam (400), connected to the outside of the rotating shaft (300) and pressing against the tail of the push rod (200); When the shaft (300) rotates, the cam (400) can drive the push rod (200) to press the semi-circular key into the keyway.

2. The semi-circular key pressing and inspection device according to claim 1, characterized in that, The groove (110) is fitted with a matching shaft extension washer (120) to guide the shaft extension into the groove (110).

3. The semi-circular key pressing and inspection device according to claim 2, characterized in that: The head of the top rod (200) is equipped with a permanent magnet (210). The permanent magnet (210) is used to attract and maintain the semi-circular bond posture before pressing, and to check the pressing effect of the semi-circular bond by using the magnetic attraction effect after pressing.

4. The semi-circular key pressing and inspection device according to claim 3, characterized in that: A handle (310) is connected to the end of the shaft (300), and the handle (310) can drive the shaft (300) to rotate when it swings.

5. The semi-circular key pressing and inspection device according to claim 3, characterized in that: A spring (500) is provided between the push rod (200) and the base (100). When the push rod (200) presses the semi-circular key, the spring (500) is compressed, and after the spring (500) is compressed, it can drive the push rod (200) to reset so as to facilitate multiple pressing.

6. The semi-circular key pressing and inspection device according to claim 5, characterized in that: A positioning buckle (600) is rotatably mounted on the base (100). The positioning buckle (600) has a positioning end (610) and a driving end (620) relative to the rotation center. A spring (800) is connected between one end of the driving end (620) and the base (100) to deflect the positioning buckle (600) toward the positioning end (610) under normal conditions. When the shaft extension is inserted into the tool groove (110), the positioning end (610) can extend into the keyway to form a positioning.

7. The semi-circular key pressing and inspection device according to claim 6, characterized in that: It also includes a slide rod (700), one end of which is connected to the top rod (200) to move synchronously with the pressing, and the other end of which presses against the drive end (620). When pressing, the slide rod (700) presses against the drive end (620), which can drive the positioning buckle (600) to deflect towards the drive end (620), so that the positioning end (610) is disengaged from the keyway to prevent interference.

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