Locking device applied to electric actuator transmission mechanism and electric actuator

Abstract

The present invention belongs to the technical field of steering gears, and specifically discloses a locking device applied to a transmission mechanism of an electric steering gear and an electric steering gear. The locking device includes a housing, a locking mechanism and a driving mechanism. The housing is provided with an installation cavity and an installation hole, and the installation hole communicates with the installation cavity; the locking mechanism includes a locking pin shaft, and the locking pin shaft has a locking position extending out of the housing and an unlocking position retracted into the housing; the driving mechanism includes a rotary pushing assembly, a power assembly and a push rod assembly. The rotary pushing assembly is arranged in the installation cavity, the power assembly is arranged on the housing, one end of the push rod assembly is connected to the power assembly, and the other end is drivingly connected to the rotary pushing assembly; when an instantaneous current is applied to the power assembly, the power assembly drives the push rod assembly to drive the rotary pushing assembly to rotate, so that the locking pin shaft is switched between the locking position and the unlocking position. The present invention can solve the problems of high energy consumption and inability to be used for a long time in the locking device applied to the transmission mechanism of the existing electric steering gear.

Description

Technical Field

[0001] The present invention belongs to the technical field of steering gears, and particularly relates to a locking device applied to a transmission mechanism of an electric steering gear and an electric steering gear. Background Art

[0002] The locking device is a key mechanism in space system engineering to ensure reliable connection and separation between components. Currently, the locking device of the transmission mechanism of the electric steering gear in the space system mainly uses electromagnetic unlocking, and is locked by spring preloading. After being powered on, the electromagnetic force overcomes the spring force to unlock. This method is widely used in the zero-position locking of missile rudders. In the missile-borne rudder system, due to the existing locking device needing to be continuously powered on for unlocking, it causes serious heating and energy consumption on the missile, and cannot be used for a long time, facing technical bottlenecks in the future trend of long-endurance and low-power consumption of missiles. Summary of the Invention

[0003] The purpose of the present invention is to provide a locking device applied to a transmission mechanism of an electric steering gear and an electric steering gear, so as to solve the problems of high energy consumption and inability to be used for a long time of the locking device applied to the transmission mechanism of the electric steering gear in the prior art.

[0004] To achieve the above purpose, according to one aspect of the present application, a locking device applied to a transmission mechanism of an electric steering gear is provided, including:

[0005] A housing, an installation cavity is formed around the housing, and an installation hole is penetrated through the housing, and the installation hole is communicated with the installation cavity;

[0006] [[ID=2,2]]A locking mechanism, the locking mechanism includes a locking pin shaft, the locking pin shaft is movably installed in the installation hole, and the locking pin shaft has a locking position extending out of the housing and an unlocking position retracted into the housing; and

[0007] A driving mechanism, the driving mechanism includes a rotary pushing component, a power component and a push rod component, the rotary pushing component is arranged in the installation cavity, the power component is arranged on the housing, and one end of the push rod component is connected with the power component, and the other end is drivingly connected with the rotary pushing component;

[0008] Wherein, when an instantaneous current is applied to the power component, the power component drives the push rod component to drive the rotary pushing component to rotate a predetermined angle, so as to switch the locking pin shaft between the locking position and the unlocking position.

[0009] Further, a first limiting step and a second limiting step are provided on the inner side wall of the mounting hole. The second limiting step is closer to the mounting cavity than the first limiting step. A stop flange is provided on the outer periphery of the locking pin shaft, and the stop flange is located between the first limiting step and the second limiting step;

[0010] The locking mechanism further includes an elastic element. The elastic element is sleeved on the locking pin shaft, and two ends of the elastic element respectively abut against the stop flange and the first limiting step.

[0011] Further, a rolling bearing is provided on the locking pin shaft. The axial direction of the rolling bearing is perpendicular to the axial direction of the locking pin shaft, and the locking pin shaft contacts the inner wall surface of the mounting hole through the rolling bearing.

[0012] Further, a roller is provided at one end of the locking pin shaft close to the rotary pushing component.

[0013] Further, the rotary pushing component includes:

[0014] A pushing wheel which is rotatably mounted in the mounting cavity. A plurality of grooves and a plurality of protrusions are provided on the outer periphery of the pushing wheel, and the plurality of grooves and the plurality of protrusions are arranged alternately. The length direction of the locking pin shaft is consistent with the radial direction of the pushing wheel; and

[0015] A ratchet wheel which is coaxially and fixedly connected with the pushing wheel. A plurality of ratchet teeth grooves are provided on the outer periphery of the ratchet wheel;

[0016] Wherein, when an instantaneous current is applied to the power component, the power component drives the push rod component to drive the ratchet wheel to rotate and be clamped in different ratchet teeth grooves, and the pushing wheel and the ratchet wheel rotate synchronously by a predetermined angle so that the end of the locking pin shaft switches between the grooves and the protrusions.

[0017] Further, a mounting groove is provided on the housing. The power component includes:

[0018] An electromagnetic coil which is mounted in the mounting groove;

[0019] An armature which is mounted in the mounting groove. The armature is located on the side of the electromagnetic coil away from the mounting cavity and is spaced from the electromagnetic coil by a predetermined gap. The push rod component passes through the electromagnetic coil and is connected with the armature; and

[0020] An elastic member which is provided in the mounting groove. The elastic member is sleeved on the push rod component, and two ends of the elastic member respectively abut against the armature and the side wall of the mounting groove;

[0021] When a transient current is applied to the electromagnetic coil, the armature moves in a direction close to the electromagnetic coil under the electromagnetic force exerted by the electromagnetic coil.

[0022] Further, the push rod assembly includes:

[0023] A push rod, which is connected to the armature and parallel to the locking pin shaft; and

[0024] A locking rod, which is hinged to one end of the push rod away from the armature, and the locking rod moves with the push rod to drive the rotary push assembly to rotate.

[0025] Further, the locking device applied to the electric actuator transmission mechanism further includes an anti-reverse component, and the anti-reverse component includes:

[0026] A support seat, which is fixedly arranged on the side wall of the installation cavity; and

[0027] A pawl, which is hinged on the support seat and engaged in the ratchet tooth groove.

[0028] Further, the locking device applied to the electric actuator transmission mechanism further includes a detection element for detecting the position of the locking pin shaft.

[0029] On the other hand, the present application also provides an electric actuator, including a locking device, and the locking device is the above-mentioned locking device.

[0030] Applying the technical solution of the present invention, when it is necessary to switch the position of the locking pin shaft, only a transient current needs to be applied to the power component. At this time, the power component can drive the push rod assembly to drive the rotary push assembly to rotate a predetermined angle in the installation cavity. When the rotary push assembly rotates, it can drive the locking pin shaft to expand and contract, so that the locking pin shaft can be switched between the locking position and the unlocking position. Compared with the structure of the locking device in the prior art that needs to be continuously powered on to unlock, the locking device in the present invention only needs to apply a transient current to the power component to achieve locking and unlocking of the locking pin shaft, with low energy consumption and can extend the service life of the locking device. Description of the Drawings

[0031] The specification drawings forming a part of the present application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0032] Figure 1 It is a cross-sectional view of the locking device applied to the electric actuator transmission mechanism disclosed in the embodiment of the present application.

[0033] Description of the Reference Numerals:

[0034] 10. Housing; 11. Installation cavity; 12. Installation hole; 121. First limiting step; 122. Second limiting step; 13. Installation groove

[0035] 20. Locking mechanism; 21. Lock pin shaft; 211. Stop flange; 22. Elastic element; 23. Roller; 24. Rolling bearing

[0036] 30. Driving mechanism; 31. Rotary pushing component; 311. Pushing wheel; 3111. Projection; 3112. Groove; 312. Ratchet; 3121. Ratchet tooth groove; 32. Power component; 321. Electromagnetic coil; 322. Armature; 323. Elastic member; 33. Push rod component; 331. Push rod; 332. Locking rod

[0037] 40. Anti-reverse component; 41. Support seat; 42. Pawl

[0038] 50. Detection element Detailed implementation manners

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description and the claims, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings are all in a very simplified form and are all drawn to non-precise scales, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention

[0040] It should be noted that in order to clearly illustrate the content of the present invention, the present invention specifically gives multiple embodiments to further illustrate different implementation manners of the present invention. Among them, the multiple embodiments are listed rather than exhaustive. In addition, for the sake of brevity of description, the content already mentioned in the previous embodiments is often omitted in the subsequent embodiments. Therefore, the content not mentioned in the subsequent embodiments can be correspondingly referred to the previous embodiments

[0041] See Figure 1 As shown, according to an embodiment of the present application, a locking device applied to an electric actuator transmission mechanism is provided. Hereinafter referred to as the locking device. The locking device includes a housing 10, a locking mechanism 20 and a driving mechanism 30

[0042] Specifically, an installation cavity 11 is formed by surrounding on the housing 10, and an installation hole 12 is penetrated through the housing 10. The installation hole 12 is communicated with the installation cavity 11; the locking mechanism 20 includes a lock pin shaft 21. The lock pin shaft 21 is movably installed in the installation hole 12. The lock pin shaft 21 has a locking position extending out of the housing 10 and an unlocking position retracted into the housing 10( Figure 1The situation when the lock pin shaft 21 is in the unlocked position is shown); the driving mechanism 30 includes a rotary pushing component 31, a power component 32, and a push rod component 33. The rotary pushing component 31 is disposed in the installation cavity 11, the power component 32 is disposed on the housing 10, one end of the push rod component 33 is connected to the power component 32, and the other end is drivingly connected to the rotary pushing component 31; wherein, when an instantaneous current is applied to the power component 32, the power component 32 drives the push rod component 33 to drive the rotary pushing component 31 to rotate a predetermined angle, so that the lock pin shaft 21 can be switched between the locked position and the unlocked position.

[0043] Combined with the structure of the locking device of the present application, it can be known that when it is necessary to switch the position of the lock pin shaft 21, only an instantaneous current needs to be applied to the power component 32. At this time, the power component 32 can drive the push rod component 33 to drive the rotary pushing component 31 to rotate a predetermined angle in the installation cavity 11. When the rotary pushing component 31 rotates, it can drive the lock pin shaft 21 to expand and contract, so that the lock pin shaft 21 can be switched between the locked position and the unlocked position. Compared with the structure of the locking device in the prior art that requires continuous power supply to unlock, the locking device in this embodiment only needs to apply an instantaneous current to the power component 32 to achieve locking and unlocking of the lock pin shaft 21, with low energy consumption and can extend the service life of the locking device.

[0044] Specifically, the outer shape of the housing 10 in this embodiment can be a cylinder, a prism, an ellipsoid cylinder or other special-shaped cylinders, which are not specifically limited in this application. In a specific implementation manner of this application, the installation cavity 11 is arranged at a position close to the bottom of the housing 10, and the installation hole 12 is arranged above the installation cavity 11. The inner diameter of the middle section of the installation hole 12 is larger than the inner diameters of both ends. At this time, a first limiting step 121 and a second limiting step 122 are formed on the inner side wall of the installation hole 12, wherein the second limiting step 122 is closer to the installation cavity 11 than the first limiting step 121. In actual design, a stop flange 211 is arranged on the outer circumference of the lock pin shaft 21, and this stop flange 211 is located between the first limiting step 121 and the second limiting step 122. When the lock pin shaft 21 moves along the installation hole 12, through the action of this stop flange 211, the first limiting step 121 and the second limiting step 122, the lock pin shaft 21 can be limited to prevent the lock pin shaft 21 from falling out of the installation hole 12.

[0045] Further, the locking mechanism 20 in this embodiment further includes an elastic element 22, which is sleeved on the lock pin shaft 21, and both ends of the elastic element 22 respectively abut against the stop flange 211 and the first limiting step 121. When the lock pin shaft 21 is switched between the locked position and the unlocked position, the elastic element 22 can play a buffering and resetting role, and can improve the use stability and reliability of the locking device. Optionally, the elastic element 22 can be a structure such as an elastic body or a rubber sleeve.

[0046] In order to improve the service life of the locking device in this embodiment, a rolling bearing 24 is provided on the lock pin shaft 21 in this embodiment. The axial direction of the rolling bearing 24 is perpendicular to the axial direction of the lock pin shaft 21, and the lock pin shaft 21 contacts the inner wall surface of the mounting hole 12 through the rolling bearing 24. That is to say, when the lock pin shaft 21 moves in the mounting hole 12 under the driving action of the driving mechanism 30, the contact between the lock pin shaft 21 and the inner wall surface of the mounting hole 12 is a rolling contact, which can reduce the friction between the lock pin shaft 21 and the mounting hole 12, reduce the wear of the lock pin shaft 21 and the housing 10, and further improve the service life of the locking device in this embodiment. Of course, in this application, the rolling bearing 24 can also be set as a roller or other structures. As long as it is other deformation methods under the concept of this application, they are all within the protection scope of this application.

[0047] Furthermore, a roller 23 is provided at one end of the lock pin shaft 21 in this embodiment close to the rotary pushing component 31. The lock pin shaft 21 contacts the rotary pushing component 31 through the roller 23. When the driving mechanism 30 drives the rotary pushing component 31 to rotate, the lock pin shaft 21 contacts the rotary pushing component 31 through the roller 23, which can reduce the friction between the lock pin shaft 21 and the rotary pushing component 31 and further improve the service life of the locking device.

[0048] Refer to again Figure 1As shown in the figure, the rotation and push component 31 in this embodiment includes a push wheel 311 and a ratchet wheel 312. The push wheel 311 is rotatably installed in the installation cavity 11. A plurality of grooves 3112 and a plurality of protrusions 3111 are arranged along the outer periphery of the push wheel 311. The plurality of grooves 3112 and the plurality of protrusions 3111 are arranged alternately, that is, one protrusion 3111 is arranged between two adjacent grooves 3112, and one groove 3112 is arranged between two adjacent protrusions 3111. And the length direction of the lock pin shaft 21 is consistent with the radial direction of the push wheel 311; the ratchet wheel 312 is fixedly connected to the push wheel 311 coaxially, and a plurality of ratchet teeth grooves 3121 are arranged on the outer periphery of the ratchet wheel 312. Specifically, the ratchet wheel 312 and the push wheel 311 can be fixed together by means of connecting screws, pins, buckles or welding, etc. The push wheel 311 and the ratchet wheel 312 are rotatably installed in the installation cavity 11 through structures such as a rotating shaft. When an instantaneous current is applied to the power component 32, the power component 32 drives the push rod component 33 to drive the ratchet wheel 312 to rotate and engage in the ratchet teeth grooves 3121 on the outer periphery of different ratchet wheels 312. When the push rod component 33 is inserted into different ratchet teeth grooves 3121, it can drive the push wheel 311 and the ratchet wheel 312 to rotate synchronously by a predetermined angle (the specific rotation angle can be determined according to the number of ratchet teeth grooves 3121 on the ratchet wheel 312 and the number of protrusions 3111 and grooves 3112 on the push wheel 311, and no specific limitation is made in this application). During the rotation of the push wheel 311, the end of the lock pin shaft 21 can be switched between the grooves 3112 and the protrusions 3111. When the end of the lock pin shaft 21 abuts in the groove 3112, the lock pin shaft 21 is in the unlocking position. When the end of the lock pin shaft 21 abuts on the protrusion 3111, the lock pin shaft 21 is in the locking position.

[0049] Optionally, a concave portion is provided at the top of the protrusion 3111. By contacting the roller 23 at the end of the lock pin shaft 21 through this concave portion, the contact stability between the lock pin shaft 21 and the protrusion 3111 can be improved.

[0050] Optionally, the sum of the number of protrusions 3111 and grooves 3112 in this embodiment is the same as the number of ratchet teeth grooves 3121 on the outer periphery of the ratchet wheel 312. Thus, when the ratchet wheel 312 rotates through one ratchet teeth groove 3121, the lock pin shaft 21 switches between the locking position and the unlocking position once. Of course, in other embodiments of this application, the number of ratchet teeth grooves 3121 can also be an integer multiple of the sum of the number of protrusions 3111 and grooves 3112. As long as it is other deformation methods under the concept of this application, they are all within the protection scope of this application.

[0051] Furthermore, the maximum outer diameter of the ratchet wheel 312 in this embodiment is smaller than the maximum outer diameter of the push wheel 311. Thus, it is possible to avoid friction between the lock pin shaft 21 and the ratchet wheel 312, and the stability and reliability of the locking device in this embodiment can be improved.

[0052] The ratchet 312 and the push wheel 311 will bear a certain impact load during the feeding movement. Therefore, in this application, a copper alloy material with good toughness, high strength and corrosion resistance is selected to process the ratchet 312 and the push wheel 311 to adapt to the working conditions of the ratchet 312 and the push wheel 311. In order to enhance the wear resistance of the friction pair, further heat treatment is required to increase the hardness of the ratchet 312 and the push wheel 311.

[0053] In order to install the power assembly 32, a mounting groove 13 is provided on the housing 10 in this embodiment. Specifically, the power assembly 32 includes an electromagnetic coil 321, an armature 322 and an elastic member 323, wherein the electromagnetic coil 321, the armature 322 and the elastic member 323 are all installed in the mounting groove 13, the armature 322 is located on the side of the electromagnetic coil 321 away from the mounting cavity 11 and is separated from the electromagnetic coil 321 by a predetermined gap (a predetermined distance when the electromagnetic coil 321 is not energized), and the push rod assembly 33 passes through the electromagnetic wire. The ring 321 is connected to the armature 322. The elastic member 323 is mounted on the push rod assembly 33, with its ends respectively abutting against the armature 322 and the sidewalls of the mounting groove 13. When a transient current is applied to the electromagnetic coil 321, the armature 322 is moved toward the electromagnetic coil 321 by the electromagnetic force applied by the electromagnetic coil 321, thereby driving the push rod assembly 33 to rotate the ratchet 312 by a predetermined angle, thereby switching the lock pin shaft 21 between the locked and unlocked positions. Alternatively, the elastic member 323 may be a spring, an elastic rubber ring, or other structures.

[0054] Furthermore, the push rod assembly 33 in this embodiment includes a push rod 331 and a locking rod 332, wherein the push rod 331 is connected to the armature 322 and is parallel to the lock pin shaft 21; the locking rod 332 is hinged at the end of the push rod 331 away from the armature 322, and the locking rod 332 extends and retracts with the push rod 331 to drive the rotating push assembly 31 to rotate. When the electromagnetic coil 321 is not energized, the armature 322 is separated from the electromagnetic coil 321 under the action of the elastic member 323, and the ratchet 312 is fixed to the pushing wheel 311, and the two can rotate along the same rotating axis. The lock pin shaft 21 is pre-tightened by the elastic element 22 and acts downward on the groove 3112 of the pushing wheel 311. The top of the lock pin shaft 21 is retracted into the housing 10, which is now in the "unlocked position". After power is supplied, the electromagnetic coil 321 generates electromagnetic force to drive the armature 322 to move downward, The push rod assembly 33 moves with the armature 322 to drive the ratchet 312 to rotate one tooth or several teeth and insert it into the ratchet groove 3121. After the pushing wheel 311 rotates at the same angle as the ratchet 312, the protrusion 3111 of the pushing wheel 311 contacts the bottom of the lock pin shaft 21, pushing the lock pin shaft 21 to move upward, so that the top of the lock pin shaft 21 extends out of the shell 10. At this time, it is the "locked position". After the electromagnetic coil 321 is powered off, the push rod assembly 33 and the armature 322 return to their original state.

[0055] Further, the locking device in this embodiment further includes a reverse-prevention component 40, which includes a support base 41 and a pawl 42. Among them, the support base 41 is fixedly arranged on the side wall of the installation cavity 11; the pawl 42 is hinged on the support base 41 and is engaged in the ratchet tooth groove 3121. The ratchet wheel 312 cannot return to move under the action of the reverse-prevention component 40, and the part of the lock pin shaft 21 protruding from the housing 10 blocks the movement of the electric actuator transmission mechanism, realizing the "locking" of the transmission mechanism.

[0056] Further, the locking device in this embodiment further includes a detection element 50 for detecting the position of the lock pin shaft 21. Optionally, the detection element 50 can be a combined element of a Hall component and a magnet. Through the action of the Hall component and the magnet, it can be used to detect the position of the lock pin shaft 21 and determine the locking state of the locking device. During actual installation, one of the Hall element and the magnet is installed on the lock pin shaft 21, and the other is installed on the housing 10, which is convenient for detecting the position of the lock pin shaft 21, with a simple structure and easy to implement. Of course, in other embodiments of the present application, the detection element 50 can also be a proximity switch or other structures. As long as it is other deformation methods under the concept of the present application, they are all within the protection scope of the present application.

[0057] On the other hand, the embodiment of the present application also provides an electric actuator, which includes the locking device in the above embodiment. Therefore, the electric actuator in this embodiment has all the technical effects of the locking device in the above embodiment. Since the technical effects of the locking device have been described in detail above, they will not be repeated here.

[0058] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0059] 1. The locking device of the present application realizes state switching through a clever ratchet and cam design, and realizes self-maintenance through the mechanism, without the need for continuous power supply for maintenance.

[0060] 2. The locking device of the present application is small in size, light in weight, and meets the development requirements of the low-cost medium and small missile field.

[0061] 3. The locking device of the present application is provided with a detection element, which can feedback the state of the locking device.

[0062] 4. The locking device of the present application has low power consumption and can achieve long endurance effects.

[0063] 5. The structure of the locking device of the present application is compact, which is of great significance for the servo system to reduce weight, reduce space size, and improve the installation and adjustment efficiency.

[0064] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures of the device. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made accordingly.

[0065] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present application.

[0066] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A locking device for an electric steering gear transmission mechanism, characterized in that: include: A housing (10), wherein a mounting cavity (11) is formed on the housing (10), a mounting hole (12) is provided through the housing (10), and the mounting hole (12) is communicated with the mounting cavity (11); A locking mechanism (20), the locking mechanism (20) comprising a locking pin shaft (21), the locking pin shaft (21) being movably mounted in the mounting hole (12), the locking pin shaft (21) having a locking position extending out of the housing (10) and an unlocking position retracted into the housing (10); and A driving mechanism (30), the driving mechanism (30) comprising a rotary pushing assembly (31), a power assembly (32) and a push rod assembly (33), the rotary pushing assembly (31) being arranged in the mounting cavity (11), the power assembly (32) being arranged on the housing (10), one end of the push rod assembly (33) being connected to the power assembly (32), and the other end being drivingly connected to the rotary pushing assembly (31); When a transient current is applied to the power assembly (32), the power assembly (32) drives the push rod assembly (33) to drive the rotary push assembly (31) to rotate a predetermined angle, so that the lock pin shaft (21) switches between the locked position and the unlocked position; a roller (23) is provided at one end of the lock pin shaft (21) close to the rotary push assembly (31); The rotating pushing assembly (31) comprises: a driving wheel (311), the driving wheel (311) being rotatably mounted in the mounting cavity (11), the outer periphery of the driving wheel (311) being provided with a plurality of grooves (3112) and a plurality of protrusions (3111), the plurality of grooves (3112) and the plurality of protrusions (3111) being alternately arranged, and the length direction of the locking pin shaft (21) being consistent with the radial direction of the driving wheel (311); and a ratchet wheel (312), the ratchet wheel (312) being coaxially fixedly connected to the driving wheel (311), and a plurality of ratchet grooves (3121) being provided on the outer periphery of the ratchet wheel (312); When a transient current is applied to the power assembly (32), the power assembly (32) drives the push rod assembly (33) to drive the ratchet (312) to rotate and be locked in different ratchet grooves (3121), and the pushing wheel (311) and the ratchet (312) are synchronously rotated by a predetermined angle so that the end of the lock pin shaft (21) switches between the groove (3112) and the protrusion (3111); The housing (10) is provided with a mounting groove (13), and the power assembly (32) comprises: an electromagnetic coil (321), the electromagnetic coil (321) being installed in the installation groove (13); an armature (322), the armature (322) being installed in the installation groove (13), the armature (322) being located on a side of the electromagnetic coil (321) away from the installation cavity (11) and spaced apart from the electromagnetic coil (321) by a predetermined gap, the push rod assembly (33) passing through the electromagnetic coil (321) and connected to the armature (322); and An elastic member (323), the elastic member (323) being disposed in the mounting groove (13), the elastic member (323) being sleeved on the push rod assembly (33), and the two ends of the elastic member (323) respectively abutting against the armature (322) and the side wall of the mounting groove (13); When an instantaneous current is applied to the electromagnetic coil (321), the armature (322) moves in a direction close to the electromagnetic coil (321) due to the electromagnetic force applied by the electromagnetic coil (321); The push rod assembly (33) comprises: a push rod (331), the push rod (331) being connected to the armature (322) and being parallel to the lock pin shaft (21); and A locking rod (332) is hinged to one end of the push rod (331) away from the armature (322), and the locking rod (332) moves with the push rod (331) to push the rotating push assembly (31) to rotate.

2. The locking device for an electric steering gear transmission mechanism according to claim 1, characterized in that: A first limiting step (121) and a second limiting step (122) are provided on the inner side wall of the mounting hole (12), the second limiting step (122) being closer to the mounting cavity (11) than the first limiting step (121), and a stop flange (211) is provided on the outer periphery of the lock pin shaft (21), the stop flange (211) being located between the first limiting step (121) and the second limiting step (122); The locking mechanism (20) further comprises an elastic element (22), wherein the elastic element (22) is sleeved on the lock pin shaft (21), and the two ends of the elastic element (22) respectively abut against the stop flange (211) and the first limiting step (121).

3. The locking device for an electric steering gear transmission mechanism according to claim 1, characterized in that: A rolling bearing (24) is provided on the locking pin shaft (21), the axial direction of the rolling bearing (24) is perpendicular to the axial direction of the locking pin shaft (21), and the locking pin shaft (21) contacts the inner wall surface of the mounting hole (12) through the rolling bearing (24).

4. The locking device for an electric steering gear transmission mechanism according to claim 1, characterized in that: The locking device applied to the electric steering gear transmission mechanism further includes an anti-reversal component (40), and the anti-reversal component (40) includes: A support seat (41), the support seat (41) is fixedly arranged on the side wall of the installation cavity (11); and A ratchet (42), the ratchet (42) is hinged on the support seat (41) and is clamped in the ratchet groove (3121).

5. The locking device for an electric steering gear transmission mechanism according to any one of claims 1 to 4, characterized in that: The locking device applied to the electric steering gear transmission mechanism further comprises a detection element (50) for detecting the position of the lock pin shaft (21).

6. An electric steering gear, characterized in that: It comprises a locking device, wherein the locking device is the locking device according to any one of claims 1 to 5.

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