Transmission shaft mounting structure and door lock

Abstract

The utility model relates to the technical field of locks, in particular to a transmission shaft mounting structure and a door lock, and the transmission shaft mounting structure comprises a transmission shaft, a plurality of clamping grooves and a plurality of clamping grooves, the mounting assembly is provided with a penetrating hole and a containing cavity which is communicated with the penetrating hole and allows the transmission shaft to extend into, the transmission shaft penetrates through the penetrating hole, and the mounting assembly is configured to be capable of driving the transmission shaft to rotate around the axis of the transmission shaft; the elastic limiting pieces extend in the axial direction of the transmission shaft, one end of each elastic limiting piece is connected to the installation assembly, the other end of each elastic limiting piece is provided with a clamping head capable of being arranged in one set of clamping grooves in a clamped mode, and the other end of each elastic limiting piece can be stressed to move in the direction away from the transmission shaft so that the corresponding clamping head can be disengaged from the corresponding clamping groove; and the elastic limiting piece generates elastic deformation. The transmission shaft is fixed through cooperation of the clamping head and the clamping groove, the extension length of the transmission shaft is conveniently adjusted, operation is easy and convenient, the transmission shaft does not need to be cut, and the operation difficulty is reduced.

Description

Technical Field

[0001] The present application relates to the field of lock technology, and in particular to a transmission shaft mounting structure and a door lock. Background Art

[0002] Existing smart door locks usually include an inner panel located inside the door body, an outer panel located outside the door body, and a lock core located inside the door body. The inner panel is provided with an inner handle, and the outer panel is provided with an outer handle. The inner handle and the outer handle are connected by a transmission shaft.

[0003] During the installation process of smart door locks, since different thicknesses of door bodies require different lengths of drive shafts, the drive shafts are usually cut according to actual needs during installation. This not only requires high skills from the installers, but also increases the labor involved in door lock installation, making the installation method cumbersome. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a drive shaft mounting structure and a door lock.

[0005] In a first aspect, the present application provides a transmission shaft mounting structure, comprising:

[0006] The transmission shaft is provided with a plurality of groups of slots at intervals along its axial direction;

[0007] A mounting assembly is provided with a through hole and a receiving cavity communicating with the through hole and for the transmission shaft to extend therethrough, the transmission shaft is passed through the through hole, and the mounting assembly is configured to drive the transmission shaft to rotate around the axis of the transmission shaft;

[0008] There are at least two elastic limiting members, which are arranged at intervals along the circumference of the through hole. The elastic limiting member extends axially along the transmission shaft, one end is connected to the mounting assembly, and the other end is provided with a clamping head that can be clamped in one group of the clamping slots. The other end can be forced to move in a direction away from the transmission shaft so that the clamping head disengages from the clamping slot and causes the elastic limiting member to produce elastic deformation.

[0009] In some embodiments, the first axial end of the transmission shaft can extend into the accommodating cavity, and the second end extends out of the through hole. The slot has a first side surface and a second side surface opposite to each other in the axial direction of the transmission shaft, and the first side surface is closer to the first end than the second side surface.

[0010] At least two of the elastic limiting members include at least one first elastic limiting member, and the clamping head of the first elastic limiting member includes a first limiting surface, and the first limiting surface cooperates with the first side surface to limit the movement of the transmission shaft in the direction of withdrawing the accommodating cavity.

[0011] In some embodiments, the clamping head of the first elastic limiting member further includes a first guiding inclined surface which forms a first acute angle with the first limiting surface, and the first guiding inclined surface is inclined relative to the axial direction of the transmission shaft when the clamping head is clamped in the clamping slot;

[0012] When the transmission shaft moves in a direction of extending into the accommodating cavity, it can slide along the first guide inclined surface to squeeze the clamping head so that the clamping head escapes from the clamping slot.

[0013] In some embodiments, the first axial end of the transmission shaft can extend into the accommodating cavity, and the second end extends out of the through hole. The slot has a first side surface and a second side surface opposite to each other in the axial direction of the transmission shaft, and the first side surface is closer to the first end than the second side surface.

[0014] At least two of the elastic limiting members include at least one second elastic limiting member, the clamping head of the second elastic limiting member includes a second limiting surface, and the second limiting surface cooperates with the second side surface to limit the movement of the transmission shaft in the direction of inserting into the accommodating cavity.

[0015] In some embodiments, the clamping head of the second elastic limiting member further includes a second guiding inclined surface forming a second acute angle with the second limiting surface, and the second guiding inclined surface is inclined relative to the axial direction of the transmission shaft when the second elastic limiting member is in a natural state;

[0016] When the transmission shaft moves in a direction of withdrawing from the accommodating cavity, it can slide along the second guide inclined surface to squeeze the clamping head so that the clamping head escapes from the clamping slot.

[0017] In some embodiments, each group of the card slots includes an annular card slot extending along the circumference of the transmission shaft;

[0018] Alternatively, each group of the clamping slots includes at least two clamping slots, and corresponds one-to-one to the clamping heads of at least two elastic limiting members.

[0019] In some embodiments, at least two of the elastic limiting members are arranged at equal intervals along the circumference of the through hole.

[0020] In some embodiments, the mounting assembly includes a shaft sleeve and a joint turntable, the shaft sleeve is provided with the through hole, the joint turntable is provided with the accommodating cavity, and the joint turntable can drive the shaft sleeve and the transmission shaft to rotate synchronously around the axis of the transmission shaft;

[0021] The elastic limiting member is connected to the shaft sleeve.

[0022] In some embodiments, the sleeve includes a sleeve body and a plurality of limiting columns, the sleeve body is provided with the through hole, the plurality of limiting columns are arranged at circumferential intervals along the through hole, the limiting columns abut against the transmission shaft, and an elastic limiting member is provided between two adjacent limiting columns.

[0023] In some embodiments, the transmission shaft is provided with at least one first anti-rotation limit surface parallel to its axial direction, and the hole wall of the through hole is provided with a second anti-rotation limit surface that can be fitted with the first anti-rotation limit surface. The first anti-rotation limit surface and the second anti-rotation limit surface cooperate to limit the rotation of the transmission shaft relative to the mounting assembly.

[0024] In a second aspect, the present application provides a door lock, comprising the drive shaft mounting structure provided in the first aspect.

[0025] The technical solution provided by the embodiments of the present application has the following advantages compared with the prior art:

[0026] The transmission shaft of the transmission shaft mounting structure is provided with multiple groups of slots at intervals along its axial direction. The mounting assembly is provided with a through hole for the transmission shaft to pass through and a receiving cavity for the transmission shaft to extend into. The clamping head of the elastic limiter can be clamped into one of the groups of slots. The other end of the elastic limiter can be forced to move in the direction away from the transmission shaft so that the clamping head is out of the slot. In this process, the elastic limiter produces elastic deformation. In this way, the length of the transmission shaft extending out of the receiving cavity can be adjusted by the cooperation of the elastic limiter and the slot. When it is necessary to increase the extended length of the transmission shaft When the drive shaft is extended, the clamping head of the elastic limit member is disengaged from the clamping slot, and the drive shaft is pulled out of the accommodating cavity and the clamping head is clamped into the next set of clamping slots; when the extended length of the drive shaft needs to be reduced, the clamping head of the elastic limit member is disengaged from the clamping slot, and the drive shaft is extended into the accommodating cavity and the clamping head is clamped into the next set of clamping slots, thereby realizing the adjustment of the extended length of the drive shaft, and the drive shaft is fixed by the cooperation of the clamping head and the clamping slot, which is convenient for adjusting the extended length of the drive shaft, easy to operate, and no need to cut the drive shaft, thereby reducing the difficulty of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1This is a disassembled schematic diagram of the transmission shaft mounting structure according to an embodiment of the present application;

[0030] Figure 2 for Figure 1 A schematic structural diagram of the transmission shaft of the transmission shaft installation structure;

[0031] Figure 3 for Figure 1 A structural diagram of the first elastic limiting member of the transmission shaft mounting structure;

[0032] Figure 4 for Figure 1 A structural diagram of the second elastic limiting member of the transmission shaft mounting structure;

[0033] Figure 5 This is a cross-sectional view of the drive shaft mounting structure according to an embodiment of the present application. Figure 1 ;

[0034] Figure 6 for Figure 5 A partial enlarged schematic diagram of point A in the middle;

[0035] Figure 7 A cross-sectional view of the transmission shaft mounting structure according to an embodiment of the present application Figure 2 ;

[0036] Figure 8 for Figure 7 A partial enlarged schematic diagram of point B in the middle.

[0037] Among them, 1. shaft sleeve; 11. shaft sleeve body; 12. limiting column;

[0038] 2. Transmission shaft; 21. Annular groove; 211. First side surface; 212. Second side surface;

[0039] 3. Connector turntable; 31. Accommodation cavity;

[0040] 4. First elastic limiting member; 41. First clamping head; 411. First limiting surface; 412. First guiding inclined surface;

[0041] 5. Second elastic limiting member; 51. Second clamping head; 511. Second limiting surface; 512. Second guiding inclined surface. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments.

[0044] like Figures 1 to 8 As shown, an embodiment of the present application provides a transmission shaft mounting structure, which includes a transmission shaft 2, a mounting assembly and an elastic limiter. The transmission shaft 2 is provided with a plurality of groups of slots at intervals along its axial direction. The mounting assembly is provided with a through hole and a receiving cavity 31 connected to the through hole and for the transmission shaft 2 to extend into, and the mounting assembly can drive the transmission shaft 2 to rotate around the axis of the transmission shaft 2. There are at least two elastic limiters, and at least two elastic limiters are arranged at intervals along the circumference of the through hole. The elastic limiter extends along the axial direction of the transmission shaft 2, one end of which is connected to the mounting assembly, and the other end of which is provided with a clamping head that can be clamped in one group of slots, and the other end can be forced to move in a direction away from the transmission shaft 2 so that the clamping head is out of the slot and the elastic limiter is elastically deformed.

[0045] It can be understood that the transmission shaft 2 is provided with multiple groups of slots at intervals along its axial direction, and the mounting assembly is provided with a through hole and a receiving cavity 31 for the transmission shaft 2 to extend into, and the clamping head of the elastic limiter can be clamped into one of the groups of slots, and the other end of the elastic limiter can be forced to move in the direction away from the transmission shaft 2 so that the clamping head is out of the slot, and the elastic limiter generates elastic deformation in this process, so that the length of the transmission shaft 2 extending out of the receiving cavity 31 can be adjusted by the cooperation of the elastic limiter and the slot. When it is necessary to increase the extended length of the transmission shaft 2, the elastic limiter can be adjusted. The clamping head of the limiting member is disengaged from the slot, and the transmission shaft 2 is pulled out of the accommodating cavity 31 and the clamping head is clamped into the next group of slots; when it is necessary to reduce the protruding length of the transmission shaft 2, the clamping head of the elastic limiting member is disengaged from the slot, and the transmission shaft 2 is extended into the accommodating cavity 31 and the clamping head is clamped into the next group of slots, so that the protruding length of the transmission shaft 2 can be adjusted, and the transmission shaft 2 can be fixed by cooperating with the clamping head and the slot, which is convenient for adjusting the protruding length of the transmission shaft 2, and is easy to operate. There is no need to cut the transmission shaft, which reduces the difficulty of operation.

[0046] It should be noted that the above-mentioned elastic limiter has a certain elasticity. The other end of the elastic limiter can be forced to move in the direction away from the transmission shaft 2, causing the elastic limiter to bend and deform. After the elastic limiter loses the external force, the elastic limiter can return to its original state under the force of its own restoration.

[0047] The elastic limiter may be made of metal, ABS, PC, etc., which are not listed here one by one.

[0048] In some embodiments, the at least two elastic limiting members are arranged at equal intervals along the circumference of the through hole to improve the stability of limiting the transmission shaft 2.

[0049] In some embodiments, the transmission shaft 2 is provided with at least one first anti-rotation limit surface parallel to its axial direction, and the hole wall of the through hole is provided with a second anti-rotation limit surface that can be fitted with the first anti-rotation limit surface. The first anti-rotation limit surface and the second anti-rotation limit surface cooperate to limit the rotation of the transmission shaft 2 relative to the mounting assembly.

[0050] It can be understood that the rotation of the transmission shaft 2 relative to the mounting assembly is limited by the cooperation of the first anti-rotation limit surface and the second anti-rotation limit surface on the transmission shaft 2, that is, the transmission shaft 2 will not rotate in the through-hole, ensuring that the mounting assembly and the transmission shaft 2 can rotate synchronously.

[0051] For example, referring to Figure 1 and Figure 2 , the above-mentioned transmission shaft 2 can be a square shaft, that is, the transmission shaft 2 can adopt a shaft with a square cross-section in a direction perpendicular to its axis. In this way, the above-mentioned through-hole is a square shaft hole, the square shaft is adapted to the shape of the square shaft hole, and the square shaft extends into the square shaft hole, so that the transmission shaft 2 and the mounting assembly can rotate synchronously through the cooperation of the square shaft and the square shaft hole. At this time, the transmission shaft 2 has four first anti-rotation limit surfaces, and the hole wall of the through-hole is provided with four second anti-rotation limit surfaces. Of course, the transmission shaft 2 is not limited to a square shaft, that is, the cross-sectional shape of the transmission shaft 2 is not limited to a square, and can also be other shapes, such as a rectangle, a pentagon, a runway shape, etc. At this time, the number of the second anti-rotation limit surfaces can be set according to actual needs.

[0052] In some of these embodiments, reference Figure 1 The mounting assembly includes a sleeve 1 and a joint disc 3. The sleeve 1 is provided with the aforementioned through hole, and the joint disc 3 is provided with the aforementioned accommodating cavity 31. The joint disc 3 can drive the sleeve 1 and the transmission shaft 2 to rotate synchronously around the axis of the transmission shaft 2. The elastic limiter is connected to the sleeve 1.

[0053] Furthermore, the above-mentioned sleeve 1 includes a sleeve body 11 and multiple limiting columns 12. A through hole is opened on the sleeve body 11, and multiple limiting columns 12 are arranged at intervals along the circumference of the through hole. The limiting columns 12 abut against the transmission shaft 2, and an elastic limiting member is provided between two adjacent limiting columns 12.

[0054] The setting of the limiting column 12 can increase the contact length between the sleeve 1 and the transmission shaft 2, so that when the joint turntable 3 drives the transmission shaft 2 to rotate through the sleeve 1, the sleeve 1 can stably transmit force to the transmission shaft 2.

[0055] The above-mentioned through-hole and the setting of the limiting column 12 can also prevent the relative rotation between the sleeve 1 and the transmission shaft 2. For example, referring to Figure 1 The transmission shaft 2 is a square shaft, and the through hole is a square shaft hole that matches the shape of the square shaft. At this time, there are four limit columns 12, each of which has a limit groove that can accommodate a corner of the transmission shaft 2. The limit groove runs through the end of the limit column 12 away from the sleeve 1, and the limit groove has two perpendicular limit surfaces. The two limit surfaces can respectively abut against the two adjacent side surfaces of the transmission shaft 2, so that relative rotation between the sleeve 1 and the transmission shaft 2 can be prevented, so that the sleeve 1 and the transmission shaft 2 can rotate synchronously.

[0056] It is understandable that the above-mentioned limiting posts can also be provided with two, and the two limiting posts respectively limit the two corners of the transmission shaft 2. Alternatively, when the cross-sectional shape of the transmission shaft is other polygonal shapes, the number of limiting posts can also be set according to actual needs.

[0057] It should be noted that the sleeve body 11 and the limiting post 12 are integrally formed, which can reduce the number of parts and ease assembly difficulty. The elastic limiting member is connected to the sleeve 1, specifically to the sleeve body 11. For example, the elastic limiting member can be connected to the sleeve body 11 via screws.

[0058] In some embodiments, the above-mentioned joint turntable 3 has a sleeve cavity for accommodating the sleeve 1, and has a limiting cavity connected to the sleeve cavity. The sleeve 1 is at least partially accommodated in the sleeve cavity, and a limiting protrusion is provided on the sleeve 1. The limiting protrusion is a radial extension of the hole through which the limiting protrusion is penetrated. The limiting protrusion is located in the limiting cavity. The limiting protrusion and the limiting cavity cooperate to limit the relative rotation of the joint turntable 3 and the sleeve 1.

[0059] That is to say, the limiting protrusion is located in the limiting cavity, so that when the joint turntable 3 rotates around the central axis of the transmission shaft 2, it can synchronously drive the sleeve 1 to rotate, and then drive the transmission shaft 2 to rotate through the sleeve 1.

[0060] In some embodiments, each group of the clamping grooves may include an annular clamping groove 21 extending along the circumference of the transmission shaft 2. Alternatively, each group of the clamping grooves includes at least two clamping grooves, which correspond one-to-one to the clamping heads of at least two elastic limiting members.

[0061] It is understandable that when each group of slots includes one annular slot 21, the clamping head of each elastic limiting member can be clamped in the annular slot 21. When each group of slots includes at least two slots, the clamping head of each elastic limiting member corresponds to one slot, and each clamping head needs to be clamped in the corresponding slot to limit the transmission shaft 2.

[0062] For example, in a specific implementation, referring to Figure 2 Each group of slots includes an annular slot 21 , and the transmission shaft 2 is provided with a plurality of annular slots 21 at intervals along its axial direction.

[0063] Reference Figure 1 and Figure 2 The first axial end of the transmission shaft 2 can extend into the accommodating cavity 31, and the second end extends out of the aforementioned through hole. The slot has a first side surface 211 and a second side surface 212 opposite to each other in the axial direction of the transmission shaft 2. The first side surface 211 is closer to the first end than the second side surface 212. Preferably, both the first side surface 211 and the second side surface 212 are perpendicular to the axial direction of the transmission shaft 2.

[0064] It is understandable that the clamping head of the elastic limiter can be inserted into the clamping slot when limiting the transmission shaft 2, and abut against the first side surface 211 and the second side surface 212. When it is necessary to adjust the extension length of the transmission shaft 2, a force is applied to each elastic limiter to make the clamping head disengage from the clamping slot. In other words, it is necessary to apply a force to the other end of the elastic limiter to move it away from the transmission shaft 2, so that the elastic limiter is deformed. In this case, the number of elastic limiters can be set according to actual needs, such as two, three, four, etc., but the number of elastic limiters should not be too large.

[0065] Alternatively, the clamping head of the elastic limiting member can be inserted into the slot when limiting the transmission shaft 2, but the clamping head of a portion of the elastic limiting member contacts the first side surface 211 and is provided with a first guide bevel 412 that can guide the transmission shaft 2 when it moves in the direction of insertion into the accommodating cavity 31. When the transmission shaft 2 moves, it can move along the first guide bevel 412 and squeeze the clamping head so that the clamping head escapes the slot. The clamping head of another portion of the elastic limiting member contacts the second side surface 212 and is provided with a second guide bevel 512 that can guide the transmission shaft 2 when it moves in the direction of withdrawal from the accommodating cavity 31. When the transmission shaft 2 moves, it can move along the second guide bevel 512 and squeeze the clamping head so that the clamping head escapes the slot. In this way, when adjusting the extension length of the transmission shaft 2, it is sufficient to bend the portion of the elastic limiting member that limits the moving direction of the transmission shaft 2.

[0066] Specifically, refer to Figures 3 to 8 , at least two elastic limit members include at least one first elastic limit member 4, the clamping head of the first elastic limit member 4 includes a first limit surface 411, and the first limit surface 411 cooperates with the first side surface 211 to limit the movement of the transmission shaft 2 in the direction of pulling out the accommodating cavity 31.

[0067] That is, when the clamping head of the first elastic limiting member 4 is inserted into the clamping slot, the first limiting surface 411 and the first side surface 211 cooperate to prevent the transmission shaft 2 from moving in the direction of being withdrawn from the accommodating cavity 31. When the clamping head of the first elastic limiting member 4 is inserted into the clamping slot, the first limiting surface 411 and the first side surface 211 abut against each other.

[0068] Furthermore, the clamping head of the above-mentioned first elastic limit member 4 also includes a first guide slope 412 that forms a first acute angle with the first limit surface 411. The first guide slope 412 is inclined relative to the axial direction of the transmission shaft 2 when the clamping head of the first elastic limit member 4 is clamped in the clamping slot.

[0069] When the transmission shaft 2 moves in the direction of being inserted into the accommodating cavity 31 , it can slide along the first guiding inclined surface 412 to squeeze the clamping head so that the clamping head escapes from the clamping slot.

[0070] Among them, the above-mentioned first guide bevel 412 has a first side and a second side in its extension direction inclined relative to the axis of the transmission shaft 2. When the clamping head is clamped in the clamping slot, the first side is close to the sleeve 1 relative to the second side in the axial direction of the transmission shaft 2, and when the clamping head is clamped, the first side is located in the clamping slot, and the second side is located outside the clamping slot or aligned with the boundary of the notch of the clamping slot. In this way, when the transmission shaft 2 moves in the direction of insertion into the accommodating cavity 31, the transmission shaft 2 will apply a force to the clamping head through the first guide bevel 412, so that the clamping head is pushed away from the transmission shaft 2 during the process of the transmission shaft 2 sliding along the first guide bevel 412, so that the clamping head is out of the clamping slot, and the movement of the transmission shaft 2 is not restricted by the clamping head of the first elastic limit member 4.

[0071] Continue to refer to Figures 3 to 8 , at least two elastic limiting members include at least one second elastic limiting member 5, the clamping head of the second elastic limiting member 5 includes a second limiting surface 511, and the second limiting surface 511 cooperates with the second side surface 212 to limit the movement of the transmission shaft 2 in the direction of insertion into the accommodating cavity 31.

[0072] That is, when the clamping head of the second elastic limiting member 5 is inserted into the clamping groove, the second limiting surface 511 and the second side surface 212 cooperate to block the movement of the transmission shaft 2 in the direction of inserting into the accommodating cavity 31 .

[0073] Furthermore, the clamping head of the above-mentioned second elastic limiter 5 also includes a second guide slope 512 which forms a second acute angle with the second limiter surface 511. The second guide slope 512 is inclined relative to the axial direction of the transmission shaft 2 when the clamping head of the second elastic limiter is clamped in the clamping slot.

[0074] When the transmission shaft 2 moves in the direction of being drawn out to the accommodating cavity 31 , it can slide along the second guiding inclined surface 512 to squeeze the clamping head so that the clamping head escapes from the clamping slot.

[0075] Among them, the above-mentioned second guide bevel 512 has a third side and a fourth side in its extension direction inclined relative to the axis of the transmission shaft 2. When the clamping head is clamped in the clamping slot, the third side is close to the sleeve 1 relative to the fourth side in the axial direction of the transmission shaft 2, and when the clamping head is clamped in the clamping slot, the third side is located in the clamping slot, and the fourth side is located outside the clamping slot or aligned with the boundary of the notch of the clamping slot. In this way, when the transmission shaft 2 moves in the direction of withdrawing the accommodating cavity 31, the transmission shaft 2 will apply a force to the clamping head through the second guide bevel 512, so that the clamping head is pushed away from the transmission shaft 2 during the process of the transmission shaft 2 sliding along the second guide bevel 512, so that the clamping head is out of the clamping slot, and the movement of the transmission shaft 2 is not restricted by the clamping head of the second elastic limit member 5.

[0076] For example, referring to Figures 3 to 8 , a plurality of annular grooves 21 are provided on the transmission shaft 2 along its axial direction. For the convenience of description, the clamping head of the first elastic limiting member 4 is defined as the first clamping head 41, and the first clamping head 41 is provided with a first limiting surface 411 and a first guiding inclined surface 412. The clamping head of the second elastic limiting member 5 is defined as the second clamping head 51, and the second clamping head 51 is provided with a second limiting surface 511 and a second guiding inclined surface 512. In addition, the direction in which the transmission shaft 2 is withdrawn from the accommodating cavity 31 is Figure 5 and Figure 7 The ob direction in the figure, the direction in which the transmission shaft 2 is inserted into the accommodating cavity 31 is Figure 5 and Figure 7 oa direction in.

[0077] Reference Figure 5 and Figure 6 , the first clamping head 41 is clamped in the annular clamping groove 21, at this time the first limiting surface 411 and the first side surface 211 are in contact, which can limit the movement of the transmission shaft 2 in the ob direction. Figure 7 and Figure 8 The second clamping head 51 is clamped in the annular clamping groove 21. At this time, the second limiting surface 511 and the second side surface 212 abut against each other, thereby limiting the movement of the transmission shaft in the oa direction. In other words, the first clamping head 41 limits the movement of the transmission shaft 2 in the ob direction, and the second clamping head 51 limits the movement of the transmission shaft 2 in the oa direction. The first elastic limiting member 4 and the second elastic limiting member 5 cooperate to limit the movement of the transmission shaft 2.

[0078] When the extension length of the transmission shaft 2 needs to be shortened, that is, when the transmission shaft 2 needs to be moved in the direction of inserting into the accommodating cavity 31, a force is applied to the second elastic limiting member 5 so that the second clamping head 51 is disengaged from the annular clamping groove 21, and the position of the first elastic limiting member 4 remains unchanged. Figure 5 and Figure 6As shown. The transmission shaft 2 is then pushed along the oa direction. During this process, the transmission shaft 2 squeezes the first clamping head 41 through the first guide bevel 412 so that the first clamping head 41 is disengaged from the annular groove 21. When the next annular groove 21 of the transmission shaft 2 moves to the position corresponding to the first clamping head 41, the first clamping head 41 enters the annular groove 21 under the action of the elastic force of the first elastic limiter 4 itself. If the transmission shaft 2 continues to be inserted into the accommodating cavity 31 at this time, the transmission shaft 2 will again squeeze the first clamping head 41 through the first guide bevel 412 so that the first clamping head 41 is disengaged from the annular groove 21. When the transmission shaft 2 is no longer inserted, the first clamping head 41 is clamped in the annular groove 21, and the second elastic limiter 5 is released so that the second clamping head 51 is clamped in the annular groove 21, thereby achieving adjustment of the transmission shaft 2.

[0079] When the extension length of the transmission shaft 2 needs to be increased, that is, when the transmission shaft 2 needs to be moved in the direction of withdrawing the accommodating cavity 31, a force is applied to the first elastic limiting member 4 so that the first clamping head 41 is disengaged from the annular clamping groove 21, and the position of the second elastic limiting member 5 remains unchanged. Figure 7 and Figure 8 As shown. The transmission shaft 2 is then dragged along the ob direction. During this process, the transmission shaft 2 squeezes the second clamping head 51 through the second guide bevel 512 so that the second clamping head 51 is disengaged from the annular groove 21. When the next annular groove 21 of the transmission shaft 2 moves to the position corresponding to the second clamping head 51, the second clamping head 51 enters the annular groove 21 under the action of the elastic force of the second elastic limiter 5. If the transmission shaft 2 continues to be pulled out of the accommodating cavity 31 at this time, the transmission shaft 2 will squeeze the second clamping head 51 again through the second guide bevel 512 so that the second clamping head 51 is disengaged from the annular groove 21. When the transmission shaft 2 is no longer pulled out, the second clamping head 51 is stuck in the annular groove 21, and the first elastic limiter 4 is released so that the first clamping head 41 is stuck in the annular groove 21, thereby achieving adjustment of the transmission shaft 2.

[0080] For example, in a specific implementation, the transmission shaft 2 is a square shaft. In this case, two of the first elastic limiters 4 and the second elastic limiters 5 are provided, wherein the two first elastic limiters 4 are arranged opposite each other, and the two second elastic limiters 5 are arranged opposite each other. Along the circumference of the through hole, one second elastic limiter 5 is provided between two adjacent first elastic limiters 4. Alternatively, one of the first elastic limiter 4 and the second elastic limiter 5 is provided, and the first elastic limiter 4 and the second elastic limiter 5 are arranged opposite each other.

[0081] The present application also provides a door lock comprising the transmission shaft mounting structure of the above embodiment. The door lock has the technical effects of the above transmission shaft mounting structure embodiment, which will not be described in detail here.

[0082] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0083] The foregoing description is intended only to provide specific embodiments of the present application, which will enable those skilled in the art to understand and implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments described herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A transmission shaft mounting structure, characterized in that: include: The transmission shaft is provided with a plurality of groups of slots at intervals along its axial direction; A mounting assembly is provided with a through hole and a receiving cavity communicating with the through hole and for the transmission shaft to extend therethrough, the transmission shaft is passed through the through hole, and the mounting assembly is configured to drive the transmission shaft to rotate around the axis of the transmission shaft; There are at least two elastic limiting members, which are arranged at intervals along the circumference of the through hole. The elastic limiting member extends axially along the transmission shaft, one end is connected to the mounting assembly, and the other end is provided with a clamping head that can be clamped in one group of the clamping slots. The other end can be forced to move in a direction away from the transmission shaft so that the clamping head disengages from the clamping slot and causes the elastic limiting member to produce elastic deformation.

2. The transmission shaft mounting structure according to claim 1, characterized in that: The first end of the transmission shaft in the axial direction can extend into the accommodating cavity, and the second end extends out of the through hole. The slot has a first side surface and a second side surface opposite to each other in the axial direction of the transmission shaft, and the first side surface is closer to the first end than the second side surface. At least two of the elastic limiting members include at least one first elastic limiting member, and the clamping head of the first elastic limiting member includes a first limiting surface, and the first limiting surface cooperates with the first side surface to limit the movement of the transmission shaft in the direction of withdrawing the accommodating cavity.

3. The transmission shaft mounting structure according to claim 2, characterized in that: The clamping head of the first elastic limiting member further includes a first guiding inclined surface which forms a first acute angle with the first limiting surface, and the first guiding inclined surface is inclined relative to the axial direction of the transmission shaft when the clamping head is clamped in the clamping slot; When the transmission shaft moves in a direction of extending into the accommodating cavity, it can slide along the first guide inclined surface to squeeze the clamping head so that the clamping head escapes from the clamping slot.

4. The transmission shaft mounting structure according to claim 1, characterized in that: The first end of the transmission shaft in the axial direction can extend into the accommodating cavity, and the second end extends out of the through hole. The slot has a first side surface and a second side surface opposite to each other in the axial direction of the transmission shaft, and the first side surface is closer to the first end than the second side surface. At least two of the elastic limiting members include at least one second elastic limiting member, the clamping head of the second elastic limiting member includes a second limiting surface, and the second limiting surface cooperates with the second side surface to limit the movement of the transmission shaft in the direction of inserting into the accommodating cavity.

5. The transmission shaft mounting structure according to claim 4, characterized in that: The clamping head of the second elastic limiting member further includes a second guiding inclined surface which forms a second acute angle with the second limiting surface, and the second guiding inclined surface is inclined relative to the axial direction of the transmission shaft when the second elastic limiting member is in a natural state; When the transmission shaft moves in a direction of withdrawing from the accommodating cavity, it can slide along the second guide inclined surface to squeeze the clamping head so that the clamping head escapes from the clamping slot.

6. The transmission shaft mounting structure according to claim 1, characterized in that: Each group of the clamping grooves includes an annular clamping groove extending along the circumference of the transmission shaft; Alternatively, each group of the clamping slots includes at least two clamping slots, and corresponds one-to-one to the clamping heads of at least two elastic limiting members.

7. The transmission shaft mounting structure according to claim 1, characterized in that: At least two of the elastic limiting members are arranged at equal intervals along the circumference of the penetration hole.

8. The transmission shaft mounting structure according to claim 1, characterized in that: The mounting assembly includes a shaft sleeve and a joint rotary plate, the shaft sleeve is provided with the through hole, the joint rotary plate is provided with the accommodating cavity, and the joint rotary plate can drive the shaft sleeve and the transmission shaft to rotate synchronously around the axis of the transmission shaft; The elastic limiting member is connected to the shaft sleeve.

9. The transmission shaft mounting structure according to claim 8, characterized in that: The sleeve includes a sleeve body and a plurality of limiting columns. The sleeve body is provided with the through hole. The plurality of limiting columns are arranged at intervals along the circumference of the through hole. The limiting columns abut against the transmission shaft. An elastic limiting member is provided between two adjacent limiting columns.

10. The transmission shaft mounting structure according to claim 1, characterized in that: The transmission shaft is provided with at least one first anti-rotation limit surface parallel to its axial direction, and the hole wall of the through hole is provided with a second anti-rotation limit surface that can be fitted with the first anti-rotation limit surface. The first anti-rotation limit surface and the second anti-rotation limit surface cooperate to limit the rotation of the transmission shaft relative to the mounting assembly.

11. A door lock, characterized in that: It comprises the transmission shaft mounting structure according to any one of claims 1 to 10.

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