Connecting rod handle lock

Abstract

The utility model relates to a connecting rod handle lock which comprises an installation base, a control handle, a transmission column, a clamping and pressing nut and a locking mechanism. A rotating shaft hole is formed in the mounting seat and is communicated with the front surface and the back surface of the mounting seat; the control handle is rotatably arranged on the mounting seat, a transmission hole is formed in the control handle, and the rotating axis of the control handle, the hole axis of the transmission hole and the hole axis of the rotating shaft hole are collinear; the transmission column is provided with a clamping and pressing part, a rotating shaft part, a transmission part and a stud part, the clamping and pressing part is located on the back side of the mounting base, the rotating shaft part rotatably penetrates through a rotating shaft hole of the mounting base, and the transmission part penetrates through a transmission hole of the control handle and is connected with the control handle to transmit torque from the control handle; the clamping and pressing nut is in threaded connection with the stud part of the transmission column, and the clamping and pressing nut and the clamping and pressing part are jointly matched to clamp, press and position the mounting seat and the control handle; the locking mechanism is in transmission connection with the transmission column, and the control handle rotates so that the locking mechanism can be switched between the locking state and the unlocking state.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lockset especially relates to a connecting rod handle lock. BACKGROUND

[0002] At present, some connecting rod handle locks appear on the market, such as the Chinese utility model patent with the publication number CN218493359U and the name "a connecting rod type forced handle", which comprises an inner lock group arranged on the inner side of the door body and an outer handle group arranged on the outer side of the door body, a plurality of limiting guides distributed above and below the inner lock group, the limiting guides are fixedly installed on the inner side of the door body, lock rods symmetrically distributed above and below the inner lock group and sliding through the limiting guides, the lock rods are connected with the inner lock group, the inner lock group is connected with the outer handle group, and the outer handle group further comprises a lock seat fixed on the door frame, and the lock rod can be slidably inserted into the lock seat, the outer handle group comprises a second base, a second rotating column, a handle, a second fixed strip and a second nut, the handle is provided with a second channel, the second rotating column penetrates the second channel, the second base and is connected with the second nut in sequence, and the second fixed strip is inserted into the handle and the second rotating column in sequence to realize the fixed connection of the handle and the second rotating column, when the handle needs to be replaced and disassembled, the second base needs to be disassembled from the door body first, then the second nut can be disassembled, and the handle cannot be disassembled alone, so that more components need to be disassembled, the disassembly operation is more complicated, and the maintenance difficulty is great. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a connecting rod handle lock, which has the advantages of reasonable design, simple structure, handle can be disassembled alone, simple disassembly operation, small maintenance difficulty and the like.

[0004] The utility model discloses a connecting rod handle lock, which has the advantages of reasonable design, simple structure, handle can be disassembled alone, simple disassembly operation, small maintenance difficulty and the like. The utility model discloses a connecting rod handle lock, which has the advantages of reasonable design, simple structure, handle can be disassembled alone, simple disassembly operation, small maintenance difficulty and the like. The utility model discloses a connecting rod handle lock, which has the advantages of reasonable design, simple structure, handle can be disassembled alone, simple disassembly operation, small maintenance difficulty and the like. The utility model discloses a connecting rod handle lock, which has the advantages of reasonable design, simple structure, handle can be disassembled alone, simple disassembly operation, small maintenance difficulty and the like.

[0005] The working principle of the utility model is as follows:

[0006] The present scheme is used in cooperation with the door body, and the locking mechanism is arranged in the door body, and the mounting seat is arranged outside the door body. Since the clamping nut is arranged outside the control handle, and since the transmission column is connected and fixed with the control handle through the transmission part, the user can realize the positioning of the transmission column in the circumferential direction by fixing the control handle, and the assembly of the clamping nut and the transmission column can be released by rotating the clamping nut outside the door body, so that the control handle can be disassembled from the mounting seat without disassembling the mounting seat from the door body, and the number of components that need to be disassembled when the control handle is disassembled can be reduced, the disassembly operation is simple, and the maintenance difficulty is small.

[0007] Further, as described above, a connecting rod handle lock, the inner wall of the rotating shaft hole is recessed to form a limiting sliding groove, the limiting sliding groove is an arc structure arranged around the hole axis of the rotating shaft hole, and the limiting sliding groove is communicated with the back of the mounting seat; the outer circumferential surface of the rotating shaft part of the transmission column forms a limiting protrusion, and the limiting protrusion is slidably arranged in the limiting sliding groove.

[0008] Further, as described above, a connecting rod handle lock further comprises a gasket, the gasket is sleeved on the transmission column, and the gasket is clamped between the clamping nut and the control handle.

[0009] Further, as described above, a connecting rod handle lock, the front surface of the mounting seat forms a clamping notch, and at least two clamping notches are arranged around the hole axis of the rotating shaft hole; the control handle forms a guide hole, the hole axis of the guide hole is parallel to the hole axis of the transmission hole; the hole of the guide hole is blocked by the gasket; further comprising a spring and a ball, the ball is slidably arranged in the guide hole of the control handle, the spring is compressedly arranged between the ball and the gasket, the control handle drives the ball to slide by rotating, and when the ball reaches the position corresponding to the clamping notch, the ball is clamped in the corresponding clamping notch by being pressed.

[0010] Further, as described above, a connecting rod handle lock, the inner wall surface of the transmission hole forms a first clamping plane, the outer circumferential surface of the transmission part of the transmission column forms a second clamping plane, and the second clamping plane is abutted with the first clamping plane to be clamped and positioned.

[0011] Further, as described above, a connecting rod handle lock, the first clamping plane of the transmission hole forms a mounting screw hole, the hole axis of the mounting screw hole is perpendicular to the hole axis of the transmission hole; further comprising a pressing bolt, one end of the pressing bolt passes through the mounting screw hole from the outside of the control handle and presses on the second clamping plane of the transmission column.

[0012] Further, the lever handle lock as claimed in the preceding claim, the operating handle is formed with a mounting groove, the transmission hole is communicated with the groove bottom of the mounting groove, the clamping nut and the threaded portion of the transmission column are both located in the mounting groove; further comprising a cover, the cover is covered on the opening of the mounting groove.

[0013] Further, the lever handle lock as claimed in the preceding claim, the locking mechanism comprises a transmission shaft, a rotating member, a connecting rod, a locking rod and a guide seat; the transmission shaft is coaxially fixedly connected with the transmission column; the rotating member is coaxially fixedly sleeved on the transmission shaft; the locking rod has a locking end and a transmission end, the locking rod is slidably arranged on the guide seat, the sliding direction of the locking rod is perpendicular to the rotation axis of the transmission shaft; one end of the connecting rod is rotatably connected with the rotating member, the other end of the connecting rod is rotatably connected with the transmission end of the locking rod; the operating handle drives the locking rod to slide to switch between the locking state and the unlocking state.

[0014] Further, the lever handle lock as claimed in the preceding claim, the locking mechanism further comprises a locking seat, the locking seat comprises a fixed seat, a hook head and an adjusting bolt; the fixed seat is formed with a first sawtooth segment and an adjusting through hole, the sawtooth arrangement direction of the first sawtooth segment is parallel to the rotation axis of the operating handle, the adjusting through hole is formed on the first sawtooth segment, the adjusting through hole is an elongated hole, the length direction of the adjusting through hole is parallel to the rotation axis of the operating handle; the hook head is sequentially formed with a locking hook portion and a connecting portion along the length direction of the hook head, the locking hook portion is formed with a locking opening, the connecting portion is formed with a second sawtooth segment and an adjusting screw hole, the sawtooth arrangement direction of the second sawtooth segment is arranged along the length direction of the hook head, the adjusting screw hole is formed on the second sawtooth segment, the second sawtooth segment is arranged in meshing with the first sawtooth segment, the adjusting screw hole is opposite to the adjusting through hole; one end of the adjusting bolt is locked in the adjusting screw hole after penetrating through the adjusting through hole; the locking rod is slid to make the locking end movable relative to the locking opening of the locking seat.

[0015] Further, the lever handle lock as claimed in the preceding claim, the side, away from the connecting portion, of the locking opening is rotatably provided with a guide roller, the rotation axis of the guide roller is perpendicular to the sliding direction of the locking rod; the locking rod is formed with a locking plane, the locking plane is arranged along the length direction of the locking rod, the locking plane is abutted with the guide roller when the locking end of the locking rod is locked in the locking opening; a guide camber is formed between the locking plane and the end face of the locking end of the locking rod.

[0016] The utility model discloses the beneficial effect of: reasonable in design, simple structure, handle can be separately disassembled, disassembly operation is simple, maintenance difficulty is small and the like. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the stereoscopic structure diagram of example;

[0018] Figure 2Fig. 1 is a front view of an embodiment;

[0019] Figure 3 Fig. 1 is a front view of an embodiment; Figure 2 Fig. 1 is a front view of an embodiment;

[0020] Figure 4 Fig. 1 is a front view of an embodiment; Figure 3 Fig. 1 is a front view of an embodiment;

[0021] Figure 5 Fig. 1 is a front view of an embodiment;

[0022] Figure 6 Fig. 1 is a front view of an embodiment;

[0023] Figure 7 Fig. 1 is a front view of an embodiment;

[0024] Figure 8 Fig. 1 is a front view of an embodiment;

[0025] Figure 9 Fig. 1 is a front view of an embodiment;

[0026] Figure 10 Fig. 1 is a front view of an embodiment;

[0027] Figure 11 Fig. 1 is a front view of an embodiment;

[0028] Figure 12 Fig. 1 is a front view of an embodiment; Figure 11 Fig. 1 is a front view of an embodiment;

[0029] BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 1 - mounting seat; 11 - mounting boss; 12 - rotating shaft hole; 121 - limiting sliding slot; 13 - clamping notch; 14 - weight reduction groove; 2 - control handle; 21 - transmission hole; 211 - first clamping plane; 22 - arrangement slot; 23 - guide hole; 24 - mounting screw hole; 3 - transmission column; 31 - clamping part; 32 - rotating shaft part; 321 - limiting protrusion; 33 - transmission part; 341 - second clamping plane; 34 - stud part; 35 - first square slot; 4 - clamping nut; 5 - washer; 6 - upper locking mechanism; 61 - transmission shaft; 62 - rotating piece; 63 - connecting rod; 64 - locking rod; 641 - locking plane; 642 - guide arc surface; 65 - guide seat; 66 - locking seat; 661 - fixing seat; 6611 - adjusting through hole; 662 - hook head; 6621 - locking opening; 6622 - guide roller; 663 - adjusting bolt; 7 - shielding cover; 8 - positioning seat; 9 - positioning rotating shaft; 91 - second square slot; 10 - mounting plate. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, objects and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings.

[0032] As Figures 1 to 12 The connecting rod handle lock of the embodiment comprises a mounting seat 1, a control handle 2, a transmission column 3, a clamping nut 4 and a locking mechanism 6. The mounting seat 1 is formed with a rotating shaft hole 12, which communicates the front face and the back face of the mounting seat 1, and the hole axis of the rotating shaft hole 12 is arranged along the horizontal direction. The control handle 2 is rotatably arranged on the mounting seat 1, and the control handle 2 is formed with a transmission hole 21 which is a non-circular hole structure. The rotating axis of the control handle 2, the hole axis of the transmission hole 21 and the hole axis of the rotating shaft hole 12 are collinear. The transmission column 3 is sequentially formed with a clamping portion 31, a rotating shaft portion 32, a transmission portion 33 and a stud portion 34 along the axial direction of the transmission column 3. The clamping portion 31 is located at the back face side of the mounting seat 1. The rotating shaft portion 32 is rotatably arranged in the rotating shaft hole 12 of the mounting seat 1. The transmission portion 33 is arranged in and clamped in the transmission hole 21 of the control handle 2, so that the transmission column 3 and the control handle 2 are coaxially fixed to transmit the torque from the control handle 2. The clamping nut 4 is threadedly connected with the stud portion 34 of the transmission column 3, and the clamping nut 4 and the clamping portion 31 jointly clamp and position the mounting seat 1 and the control handle 2. The locking mechanism 6 is in transmission connection with the transmission column 3. The control handle 2 drives the transmission column 3 to coaxially rotate by rotating, so that the locking mechanism 6 is switched between the locked state and the unlocked state.

[0033] The working principle of the embodiment is as follows:

[0034] The present scheme is used in cooperation with a door body. In use, the locking mechanism 6 is arranged in the door body, and the mounting seat 1 is arranged on the outer side of the door body. Since the clamping nut 4 is arranged on the outer side of the control handle 2, and the transmission column 3 is coaxially fixed with the control handle 2 through the transmission portion 33, the user can position the transmission column 3 in the circumferential direction by fixing the control handle 2, and the assembly of the clamping nut 4 and the transmission column 3 can be released by rotating the clamping nut 4 on the outer side of the door body, so that the control handle 2 can be disassembled from the mounting seat 1 without disassembling the mounting seat 1 from the door body. In addition, the transmission hole 21 adopts a non-circular hole structure, so that the transmission portion 33 of the transmission column 3 can be coaxially fixed with the control handle 2 without additional components, which can reduce the number of components that need to be disassembled when the control handle 2 is disassembled, and the disassembly operation is simple and the maintenance difficulty is small.

[0035] As Figure 8 And Figure 9As shown, the inner wall of the rotating shaft hole 12 is recessed to form two limiting sliding grooves 121, and the two limiting sliding grooves 121 are symmetrically arranged along the hole axis of the rotating shaft hole 12. The limiting sliding groove 121 is an arc structure arranged around the hole axis of the rotating shaft hole 12, and the limiting sliding groove 121 is in communication with the back of the mounting seat 1. The outer circumferential surface of the rotating shaft part 32 of the transmission column 3 is formed with two limiting protrusions 321, and the two limiting protrusions 321 are slidably arranged in the two limiting sliding grooves 121 one by one. Through such design, the rotation range of the control handle 2 can be limited, and the rotation angle of the control handle 2 during operation can be avoided.

[0036] As shown in Figure 3 , Figure 4 and Figure 5 , the control handle 2 is formed with a mounting groove 22, the transmission hole 21 is in communication with the groove bottom of the mounting groove 22, and the clamping nut 4 and the threaded column part 34 of the transmission column 3 are all in the mounting groove 22. Further comprising a shielding cover 7, the shielding cover 7 is covered on the slot opening of the mounting groove 22. Through such design, the clamping nut 4 and the threaded column part 34 of the transmission column 3 can be avoided to be directly exposed to the external environment, which plays a dustproof protection role and is more beautiful.

[0037] As shown in Figure 3 and Figure 4 , the present embodiment further comprises a gasket 5, the gasket 5 is sleeved on the transmission column 3, and the gasket 5 is clamped between the clamping nut 4 and the groove bottom of the mounting groove 22. By adding the gasket 5, the reliability and stability of the connecting structure between the clamping nut 4 and the transmission column 3 can be improved, and the loosening of the clamping nut 4 during use can be prevented.

[0038] As shown in Figure 5 , Figure 6 and Figure 7As shown, the front surface of the mounting base 1 is formed with a mounting boss 11, and the end surface of the mounting boss 11 is formed with the rotation shaft hole 12 and two sets of clamping notches, the two sets of clamping notches are symmetrically arranged along the hole axis of the rotation shaft hole 12, and each set of clamping notches includes three clamping notches 13 arranged around the hole axis of the rotation shaft hole 12; the bottom of the installation groove 22 of the control handle 2 is formed with two guide holes 23, the hole axes of the guide holes 23 are parallel to the hole axis of the transmission hole 21; the guide holes 23 are blocked by the gasket 5; and two springs and two balls (not shown in the figure) are further included, one spring, one ball, one guide hole 23, and one set of clamping notches are correspondingly arranged, the ball is slidably arranged in the guide hole 23 of the control handle 2, and the spring is arranged in compression between the ball and the gasket 5, the control handle 2 drives the ball to slide by rotating, and the ball is clamped in the corresponding clamping notch 13 when the ball reaches the position of the corresponding clamping notch 13. Through such a design, the rotating operation of the control handle 2 has multiple gears, so that the control handle 2 has higher accuracy when rotating and is more convenient to operate; and the hole opening of the guide hole 23 is blocked by the gasket 5, the spring is arranged in compression between the ball and the gasket 5, the user can install and dismount the spring and the ball from the installation groove 22, and the installation operation is more convenient. In addition, the end surface of the mounting boss 11 is further provided with two weight reduction grooves 14, the two weight reduction grooves 14 are arranged around the hole axis of the rotation shaft hole 12, and each weight reduction groove 14 is between the two sets of clamping notches, the weight of the mounting base 1 can be reduced by arranging the weight reduction grooves 14, so that the mounting of the mounting base 1 is more convenient.

[0039] As shown in Figure 6 , Figure 9 and Figure 10 , the inner wall surface of the transmission hole 21 is formed with two symmetrically arranged first clamping planes 211, and the outer peripheral surface of the transmission part 33 of the transmission column 3 is formed with two symmetrically arranged second clamping planes 341, and one second clamping plane 341 is positioned and clamped by abutting against one first clamping plane 211. Through such a design, the clamping structure between the transmission part 33 of the transmission column 3 and the transmission hole 21 of the control handle 2 is more stable, which is conducive to the coaxial rotation of the control handle 2 driving the transmission column 3.

[0040] As shown in Figure 5As shown, one of the first clamping planes 211 of the transmission hole 21 is formed with a mounting screw hole 24, the hole axis of the mounting screw hole 24 is perpendicular to the hole axis of the transmission hole 21; further comprising a jacking bolt (not shown in the drawings), one end of the jacking bolt passes through the mounting screw hole 24 from the outside of the control handle 2 and jacks against one of the second clamping planes 341 of the transmission column 3. Through such design, the clamping structure between the transmission part 33 of the transmission column 3 and the transmission hole 21 of the control handle 2 can be further reinforced, which is beneficial to the coaxial rotation of the control handle 2 driving the transmission column 3.

[0041] As shown in Figure 1 , Figure 2 and Figure 3 , the embodiment further comprises a positioning seat 8 and a positioning shaft 9, the mounting seat 1 is arranged on one side of the door body, the positioning seat 8 is arranged on the other side of the door body, the back surface of the mounting seat 1 is arranged opposite to the back surface of the positioning seat 8, and the mounting seat 1 and the positioning seat 8 are both mounted on the door body through a mounting plate 10; the clamping part 31 of the transmission column 3 is formed with a first square groove 35 on the end surface away from the shaft hole 12, one end of the positioning shaft 9 is rotatably arranged on the back surface of the positioning seat 8, and the other end surface of the positioning shaft 9 is formed with a second square groove 91, the second square groove 91 is opposite to the first square groove 35. The locking mechanism 6 comprises a transmission shaft 61, a rotating piece 62, two connecting rods 63, two lock rods 64 and four guide seats 65; the transmission shaft 61 is a square shaft, the two ends of the transmission shaft 61 are respectively embedded in the first square groove 35 and the second square groove 91, so that the transmission shaft 61 is positioned in the axial direction, and the transmission shaft 61 is coaxially and fixedly connected with the transmission column 3 and the positioning shaft 9; the rotating piece 62 has a rhombus structure, and the rotating piece 62 is coaxially and fixedly sleeved on the transmission shaft 61; the four guide seats 65 are arranged in the door body in sequence in the up-down direction, of which two guide seats 65 are above the transmission shaft 61, and the other two guide seats 65 are below the transmission shaft 61; one of the lock rods 64 is slidably arranged on the two guide seats 65 above the transmission shaft 61, and the other lock rod 64 is slidably arranged on the two guide seats 65 below the transmission shaft 61, the sliding direction of each lock rod 64 is arranged in the up-down direction, the end of the lock rod 64 away from the transmission shaft 61 is a locking end, and the end of the lock rod 64 close to the transmission shaft 61 is a transmission end; one connecting rod 63 corresponds to one lock rod 64, one end of the connecting rod 63 is rotatably connected with the transmission end of the lock rod 64, the other end of the connecting rod 63 is rotatably connected with the rotating piece 62, and the connection positions of the two connecting rods 63 and the rotating piece 62 are symmetrically arranged with the axis of the transmission shaft 61; the control handle 2 drives the two lock rods 64 to slide away from or close to each other through rotation, so that the locking mechanism 6 switches between the locked state and the unlocked state.

[0042] As shown in Figure 1 , Figure 2 ,Figure 3 , Figure 11 and Figure 12 As shown, the locking mechanism 6 also includes two locking seats 66, which are located on the upper and lower sides of the door body, respectively. Each locking seat 66 includes a fixed seat 661, a hook 662, and two adjusting bolts 663. The fixed seat 661 is fixedly mounted on the wall or door frame. The fixed seat 661 has a first serrated section and two adjusting holes 6611. The serrations of the first serrated section are arranged parallel to the rotation axis of the control handle 2. The two adjusting holes 6611 are arranged along the rotation axis of the control handle 2. The adjusting holes 6611 are elongated holes, and their length is parallel to the rotation axis of the control handle 2. The head 662 has a locking hook and a connecting part formed sequentially along its length. The locking hook has a locking port 6621, and the connecting part has a second serrated section and two adjusting screw holes. The serrations of the second serrated section are arranged along the length of the hook head 662. The second serrated section has two adjusting screw holes. The second serrated section is engaged with the first serrated section. The two adjusting screw holes are directly opposite to the two adjusting through holes 6611. An adjusting bolt 663, an adjusting screw hole, and an adjusting through hole 6611 correspond to each other. One end of the adjusting bolt 663 passes through the adjusting through hole 6611 and locks into the adjusting screw hole. The locking rod 64 slides so that its locking end locks into or leaves the locking port 6621 of the locking seat 66. Because the adjustment hole 6611 is an elongated hole, the position of the adjusting bolt 663 can be adjusted according to different installation environments during the installation of the locking seat 66, thereby adjusting the height of the locking port 6621 of the locking seat 66. This allows the locking seat 66 to adapt to different door thicknesses, facilitating installation and debugging, and also making it easy to adjust when the seal becomes loose due to long-term use. Furthermore, the interlocking of the second serrated segment and the first serrated segment makes the connection structure between the fixing seat 661 and the hook 662 more stable, improving the stability of the locking seat 66.

[0043] like Figure 1 , Figure 2 , Figure 3 , Figure 11 and Figure 12As shown, the locking hole 6621 is rotatably provided with a guide roller 6622 on the side away from the connecting part, and the rotation axis of the guide roller 6622 is perpendicular to the sliding direction of the lock rod 64; the lock rod 64 is formed with a locking plane 641 arranged along the length direction of the lock rod 64, and the locking plane 641 abuts against the guide roller 6622 when the locking end of the lock rod 64 is locked into the locking hole 6621; the locking plane 641 and the end face of the locking end of the lock rod 64 form a guide curved surface 642. Through the design, the locking end of the lock rod 64 can be more easily locked into the locking hole 6621 and tightly contacted with the locking hole 6621, so that the connecting structure of the lock rod 64 and the locking seat 66 is more stable after the locking mechanism 6 is locked, and the locking effect of the connecting rod handle lock is improved.

[0044] The preferred embodiments of the present application have been described above by way of example only, not for limitation, and various changes, combinations, and modifications can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A link handle lock characterized by: The utility model provides a kind of lock, including mounting seat, control handle, transmission column, clamping nut and locking mechanism;Formed with rotation shaft hole on mounting seat, rotation shaft hole is communicated with the front and back of mounting seat;Control handle is rotatably arranged on mounting seat, and formed with transmission hole on control handle, the rotation axis of control handle, the hole axis of transmission hole and the hole axis of rotation shaft hole are collinear;The transmission column is formed with clamping portion, rotation shaft portion, transmission portion and stud portion in sequence along its axial direction, clamping portion is at the back side of mounting seat, rotation shaft portion is rotatably placed in the rotation shaft hole of mounting seat, transmission portion is placed in the transmission hole of control handle and is connected with control handle to transmit the torque from control handle;The clamping nut is threadedly connected with the stud portion of transmission column, and the clamping nut cooperates with clamping portion to clamp and position mounting seat and control handle;The locking mechanism is drivingly connected with transmission column, and control handle is switched between locking state and unlocking state by rotating the locking mechanism.

2. A link handle lock as claimed in claim 1 wherein: The inner wall of the rotation shaft hole is recessed to form a limiting sliding groove, the limiting sliding groove is a circular arc structure arranged around the hole axis of the rotation shaft hole, and the limiting sliding groove is communicated with the back of the mounting seat.

3. A link handle lock as defined in claim 1 wherein: Further comprising a gasket, the gasket is sleeved on the transmission column, and the gasket is clamped between the clamping nut and the control handle.

4. A link handle lock as claimed in claim 3 wherein: The front of the mounting seat is formed with clamping notches, and at least two clamping notches are arranged around the hole axis of the rotation shaft hole;The control handle is formed with a guide hole, and the hole axis of the guide hole is parallel to the hole axis of the transmission hole;The gasket is arranged to block the hole of the guide hole;Further comprising a spring and a ball, the ball is slidably arranged in the guide hole of the control handle, the spring is arranged in compression between the ball and the gasket, the control handle drives the ball to slide by rotating, and the ball is clamped in the corresponding clamping notch when the ball reaches the position corresponding to the clamping notch.

5. A link handle lock as defined in claim 1 wherein: A first clamping plane is formed on the inner wall surface of the transmission hole, and a second clamping plane is formed on the outer peripheral surface of the transmission portion of the transmission column, and the second clamping plane is abutted with the first clamping plane to be clamped and positioned.

6. A link handle lock as claimed in claim 5 wherein: An installation screw hole is formed on the first clamping plane of the transmission hole, and the hole axis of the installation screw hole is perpendicular to the hole axis of the transmission hole;Further comprising a pressing bolt, one end of the pressing bolt passes through the installation screw hole from the outside of the control handle and presses on the second clamping plane of the transmission column.

7. A link handle lock as defined in claim 1 wherein: A placement groove is formed on the control handle, the transmission hole is communicated with the groove bottom of the placement groove, and the clamping nut and the stud portion of the transmission column are both in the placement groove;Further comprising a shielding cover, the shielding cover covers the slot opening of the placement groove.

8. A link handle lock as defined in claim 1 wherein: The locking mechanism comprises a transmission shaft, a rotating member, a connecting rod, a locking rod and a guide seat; the transmission shaft is coaxially fixedly connected with the transmission column; the rotating member is coaxially fixedly sleeved on the transmission shaft; one end of the locking rod is a locking end, the other end of the locking rod is a transmission end, the locking rod is slidably arranged on the guide seat, the sliding direction of the locking rod is perpendicular to the rotation axis of the transmission shaft; one end of the connecting rod is rotatably connected with the rotating member, the other end of the connecting rod is rotatably connected with the transmission end of the locking rod; the control handle is switched between the locking state and the unlocking state by rotating to drive the locking rod to slide.

9. A link handle lock as defined in claim 1 wherein: The locking mechanism comprises a locking rod and a locking seat, the locking seat comprises a fixed seat, a hook head and an adjusting bolt; the fixed seat is formed with a first sawtooth section and an adjusting through hole, the sawtooth arrangement direction of the first sawtooth section is parallel to the rotation axis of the control handle, the adjusting through hole is formed on the first sawtooth section, the adjusting through hole is an elongated hole, the length direction of the adjusting through hole is parallel to the rotation axis of the control handle; the hook head is sequentially formed with a locking hook portion and a connecting portion along the length direction of the hook head, the locking hook portion is formed with a locking opening, the connecting portion is formed with a second sawtooth section and an adjusting screw hole, the sawtooth arrangement direction of the second sawtooth section is arranged along the length direction of the hook head, the adjusting screw hole is formed on the second sawtooth section, the second sawtooth section is arranged in meshing with the first sawtooth section, and the adjusting screw hole is opposite to the adjusting through hole; one end of the adjusting bolt is locked into the adjusting screw hole after passing through the adjusting through hole; the locking rod is in transmission connection with the transmission column, so that the locking end of the locking rod can be moved relative to the locking opening of the locking seat by the control handle.

10. A link handle lock as claimed in claim 9 wherein: The side of the locking opening away from the connecting portion is rotatably provided with a guide roller, the rotation axis of the guide roller is perpendicular to the sliding direction of the locking rod; the locking rod is formed with a locking plane, the locking plane is arranged along the length direction of the locking rod, and the locking plane abuts against the guide roller when the locking end of the locking rod is locked into the locking opening; a guide curved surface is formed between the locking plane and the end face of the locking end of the locking rod.

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