Replacement-free square key and implementation method

Abstract

A kind of replacement-free square key and implementation method, by square key, wedge, adjusting screw and square nut, pressure loss alarm component composition, implementation method is realized by adjusting;The square key is cuboid, recess is equipped with in the middle position of upper side, through gap is equipped with between upper side, lower side, upper through groove and lower through groove are equipped with in the position corresponding to upper and lower of the outer end of through gap, and the middle position of upper through groove is horizontally equipped with transverse hole, and the through hole is communicated with recess along the direction of transverse hole;Square nut is matched with upper through groove and lower through groove, square nut is communicated with upper through groove and lower through groove by being punched through in the position of opposite transverse hole, adjusting screw is matched with square nut and is screwed and is in contact with the end face of wedge;The square key can be guaranteed to be in the state of tight fit with keyway again without replacing square key, and the technical requirements are reached.Avoid disassembly and replacement, reduce assembly technical requirements, improve work quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of torque transmission using a square key and keyway, specifically to a square key that can adjust the interval of the mating between the square key and keyway to achieve a tight fit without replacement. Background Technology

[0002] When mechanical motion transmits torque using a square key and keyway, a tight fit between the square key and keyway is required. Any loosening will affect the torque transmission efficiency and cause mechanical vibrations. Prolonged loosening can damage the machine, necessitating replacement of the square key to restore a tight fit.

[0003] Replacing and assembling square keys is not only time-consuming but also requires advanced assembly skills, which are beyond the capabilities of most operators. Therefore, a technical solution is needed that can achieve a tight fit between the square key and the keyway without requiring key replacement. Summary of the Invention

[0004] This invention provides a method for achieving a tight fit between the square key and the keyway without replacing the square key, thus not affecting the torque transmission effect.

[0005] The non-replaceable square key expands outwards along the two surfaces that mate with the keyway, ensuring a tight fit. This prevents the square key from becoming loose during use, thus avoiding a lack of tight fit; it also prevents the square key from failing to achieve a tight fit during assembly.

[0006] This invention is achieved through the following technical solution:

[0007] A replacement-free square key consists of a square key, a wedge, an adjusting screw and a square nut, and a pressure loss alarm assembly;

[0008] The key is a cuboid with a recess in the middle of its upper side and a through notch between its upper and lower sides. Upper and lower through slots are located at corresponding positions on the outer ends of the through notch. A horizontal through hole is located in the middle of the upper through slot, and a through hole is machined along the direction of the horizontal through hole to connect with the recess. A square nut is matched and fitted with the upper and lower through slots. The square nut is horizontally connected to the horizontal through hole. An adjusting screw is screwed into the square nut to abut against the end face of the wedge.

[0009] The pressure loss alarm component consists of a pressure sensor and a pressure display. The pressure sensor is installed in the recess, and the pressure display is fixedly installed in the transverse hole of the upper through slot. The wires are connected to the pressure sensor and the pressure display through the through hole.

[0010] The through-hole is wedge-shaped, narrower on the inside and wider on the outside, matching the shape of the wedge block.

[0011] The square nut is square in shape, with a threaded hole in the middle to cooperate with the adjusting screw, and the distance between the upper and lower through slots is equal to the height of the square nut.

[0012] One method to achieve the goal of eliminating the need to change the square key is:

[0013] Under normal circumstances, the upper and lower sides of the non-replaceable square key are in a tight fit with the sides of the keyway. After the non-replaceable square key has been used for a period of time, the upper and lower sides may no longer achieve a tight fit with the sides of the keyway. The pressure display will then show insufficient pressure load and trigger an alarm, indicating that the pressure load on the pressure sensor does not meet the specified value and adjustment is required. The adjustment steps are as follows:

[0014] (1) When the key and keyway do not achieve a tight fit without replacement, rotate the adjusting screw that mates with the square nut. The adjusting screw will press against the end face of the wedge, causing the wedge to move into the through-hole. This will cause the upper and lower sides to expand outward, thus achieving a tight fit between the upper and lower sides and both sides of the keyway. At the same time, the pressure loss alarm component will activate, and the pressure sensor will receive pressure, which will be reflected on the pressure display. When the pressure load requirement is reached, stop rotating the square nut. At this point, the key and keyway will be in a tight fit.

[0015] (2) When rotating the square nut, if the pressure display shows no change in pressure load:

[0016] A. Rotate the adjusting bolt in the opposite direction to remove it from the square nut. Pass one end of the round bar through the screw hole of the square nut until it abuts against the end face of the wedge. Apply external force to the other end of the round bar to displace the wedge into the through notch, causing the upper and lower sides of the square key to expand outward. When the pressure load requirement is met, it indicates that the upper and lower sides of the square key are in a tight fit with the two sides of the keyway again.

[0017] B. Remove the round bar, and screw the adjusting screw and square nut together to lock them against the end face of the wedge.

[0018] This invention ensures that the square key and keyway are in a tight fit again without replacing the square key, thus meeting the technical requirements. It avoids disassembly and replacement, reduces assembly technical requirements, and improves work quality and efficiency. Attached Figure Description

[0019] Figure 1 —Top view of the invention.

[0020] Figure 2 —— Figure 1 Schematic diagram of the A-A cross section.

[0021] Figure 3 —Right view of the present invention.

[0022] In the diagram, 1 is the adjusting screw, 2 is the pressure indicator, 3 is the transverse hole, 4 is the square nut, 5 is the upper through slot, 6 is the wedge, 7 is the through hole, 8 is the recess, 9 is the pressure sensor, 10 is the upper side, 11 is the lower side, 12 is the through notch, 13 is the square key, and 14 is the lower through slot. Detailed Implementation

[0023] The technical solution of this invention is implemented as follows:

[0024] like Figure 1 , Figure 2 , Figure 3 As shown, a non-replaceable square key is characterized by comprising a square key 13, a wedge 6, an adjusting screw 1, a square nut 4, and a pressure loss alarm assembly;

[0025] The square key 13 is a cuboid. A recess 8 is provided in the middle of the upper side 10. A through notch 12 is provided between the upper side 10 and the lower side 11. An upper through groove 5 and a lower through groove 14 are provided at corresponding positions on the outer end of the through notch 12. A transverse hole 3 is provided in the middle of the upper through groove 5 in the horizontal direction. A through hole 7 is machined along the direction of the transverse hole 3 to communicate with the recess 8. A square nut 4 is matched and fitted with the upper through groove 5 and the lower through groove 14. The square nut 4 is horizontally opened and connected to the transverse hole 3. The adjusting screw 1 is matched and screwed into the square nut 4 to abut against the end face of the wedge block 6 to lock it.

[0026] The pressure loss alarm component consists of a pressure sensor 9 and a pressure display 2. The pressure sensor 9 is installed in the recess 8, and the pressure display 2 is fixedly installed in the transverse hole 3 of the upper through groove 3. The wires are connected to the pressure sensor 9 and the pressure display 2 through the through hole 7. When the pressure load is less than the specified value, the pressure display 2 will react and alarm.

[0027] Furthermore, the through notch 12 is wedge-shaped, with a smaller inner diameter and a larger outer diameter, matching the shape of the wedge block 6.

[0028] Furthermore, the square nut 4 is square in shape, with a threaded hole in the middle that mates with the adjusting screw 1, and the distance between the upper through groove 5 and the lower through groove 14 is equal to the height of the square nut 4.

[0029] The specific implementation method is as follows.

[0030] When transmitting torque using a method that eliminates the need to replace the square key and keyway, the upper side 10 and lower side 11 of the square key 13 are matched with the two sides of the keyway. The adjusting screw 1, which engages with the square nut 4, is rotated. The adjusting screw 1 presses against the end face of the wedge 6, causing the wedge 6 to move into the through-notch 12. This causes the upper side 10 and lower side 11 to expand outwards, resulting in a tight fit between the upper side 10 and lower side 11 and the two sides of the keyway. Simultaneously, the pressure loss alarm component activates, and the pressure sensor 9 receives pressure, which is reflected on the pressure display 2. When the required pressure load is reached, the rotation of the square nut 4 is stopped. At this point, the square key 13 and the keyway are in a tight fit state.

[0031] One method to achieve the goal of eliminating the need to change the square key is:

[0032] Under normal circumstances, the upper side 10 and lower side 11 of the keyless replacement square key are in a tight fit with both sides of the keyway. However, after the keyless replacement square key has been used for a period of time, the upper side 10 and lower side 11 may no longer achieve a tight fit with both sides of the keyway. The pressure display 2 will then show insufficient pressure load and issue an alarm, indicating that the pressure load on the pressure sensor 9 does not meet the specified value and adjustment is required. The adjustment steps are as follows:

[0033] (1) When the key and keyway do not achieve a tight fit, rotate the adjusting screw 1 that engages with the square nut 4. The adjusting screw 1 abuts against the end face of the wedge 6, causing the wedge 6 to move into the through notch 12, causing the upper side 10 and lower side 11 to expand outward, thus achieving a tight fit between the upper side 10 and lower side 11 and both sides of the keyway. At the same time, the pressure loss alarm component operates, and the pressure sensor 9 receives pressure, which is reflected on the pressure display 2. When the pressure load requirement is reached, stop rotating the square nut 4. At this time, the square key 13 and keyway are in a tight fit state.

[0034] (2) When the square nut 4 is rotated, and the pressure display 2 shows no change in pressure load:

[0035] A. Rotate the adjusting bolt 1 in the reverse direction to move it away from the square nut 4. Pass one end of the round bar through the screw hole of the square nut 4 until it abuts against the end face of the wedge 6. Apply external force to the other end of the round bar to move the wedge 6 into the through notch 12, causing the upper side 10 and lower side 11 of the square key 13 to expand outward. When the pressure load requirement is reached, it indicates that the upper side 10 and lower side 11 of the square key 13 are in a tight fit with the two sides of the keyway again.

[0036] B. Take out the round bar, and screw the adjusting screw 1 and the square nut 4 together to lock them against the end face of the wedge block 6.

[0037] After adjustment using the above methods, the non-replaceable square key will be guaranteed to be in a tight fit with the keyway again, meeting the technical requirements.

Claims

1. A replaceable square key, comprising a square key, a wedge, an adjusting screw and a square nut, and a pressure failure alarm assembly; characterized in that... : The key is a cuboid with a recess in the middle of its upper side and a through notch between its upper and lower sides. Upper and lower through slots are located at corresponding positions on the outer ends of the through notch. A horizontal through hole is located in the middle of the upper through slot, and a through hole is machined along the direction of the horizontal through hole to connect with the recess. A square nut is matched and fitted with the upper and lower through slots. The square nut is horizontally connected to the horizontal through hole. An adjusting screw is screwed into the square nut to abut against the end face of the wedge. The pressure loss alarm component consists of a pressure sensor and a pressure display. The pressure sensor is installed in the recess, and the pressure display is fixedly installed in the transverse hole of the upper through slot. The wires are connected to the pressure sensor and the pressure display through the through hole.

2. The replacement-free square key according to claim 1, characterized in that, The through-hole is wedge-shaped, with a smaller inner diameter and a larger outer diameter, matching the shape of the wedge block.

3. The replacement-free square key according to claim 1, characterized in that, The square nut is square in shape, with a threaded hole in the middle to cooperate with the adjusting screw. The distance between the upper and lower through slots is equal to the height of the square nut.

4. A method for implementing a keyless replacement according to claims 1-3, characterized in that: Under normal circumstances, the upper and lower sides of the non-replaceable square key are in a tight fit with the two sides of the keyway. After the non-replaceable square key has been used for a period of time, the upper and lower sides may no longer be in a tight fit with the two sides of the keyway. The pressure display will show insufficient pressure load and issue an alarm, indicating that the pressure load on the pressure sensor does not meet the specified value and needs to be adjusted. The adjustment steps are as follows: (1) When the key and keyway do not achieve a tight fit without replacement, rotate the adjusting screw that engages with the square nut. The adjusting screw abuts against the end face of the wedge, causing the wedge to move into the through notch, causing the upper and lower sides to expand outward. Thus, the upper and lower sides are tightly fitted with both sides of the keyway. At the same time, the pressure loss alarm component works, and the pressure sensor receives pressure and reflects it on the pressure display. When the pressure load requirement is reached, stop rotating the square nut. At this time, the key and keyway are in a tight fit state. (2) When rotating the square nut, if the pressure display shows no change in pressure load: A. Rotate the adjusting bolt in the opposite direction to remove it from the square nut. Pass one end of the round bar through the screw hole of the square nut until it abuts against the end face of the wedge. Apply external force to the other end of the round bar to make the wedge move into the through notch, causing the upper and lower sides of the square key to expand outward. When the pressure load requirement is reached, it indicates that the upper and lower sides of the square key are in a tight fit with the two sides of the keyway again. B. Remove the round bar, and screw the adjusting screw and square nut together to lock them against the end face of the wedge.

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