CN102019906A - Steering shaft lock - Google Patents

Abstract

A steering shaft lock, comprising: a lock body, an end cover, a drive source, a worm and a gear assembly; one end of the lock body is open, and the end cover covers the opening of the lock body; the drive source is installed on the end cover, and the worm is installed on the drive source On the drive shaft and can rotate with the drive shaft, the gear assembly is rotatably supported on the end cover and meshed with the worm; the steering shaft lock also includes a lock rod and a transmission mechanism, and the transmission mechanism transmits the power of the driving source to the lock rod; the lock body There is a locking hole on the top, and the locking rod can be linearly reciprocated in the locking hole between the locked and unlocked positions; the transmission mechanism includes a threaded rod, one end of the threaded rod is provided with external or internal threads, and the other end There is a pin shaft, and the threaded rod is connected with the lock rod through the pin shaft; the gear assembly includes a gear and a gear shaft supporting the gear, and the gear shaft has internal or external threads, and is installed in cooperation with the external or internal threads of the threaded rod to drive the thread The threaded rod moves back and forth linearly along its axis under the restriction of the locking rod.

Description

A steering shaft lock

technical field

The invention belongs to a vehicle accessory, and more specifically relates to a steering shaft lock.

Background technique

In a car, the steering shaft lock is used to lock the steering shaft. After the steering shaft is locked, the car cannot turn. Even if someone illegally enters the car and starts the car, the car cannot be turned or driven away. Therefore, the steering shaft lock plays an anti-theft role.

The current steering shaft locks are generally electric, that is, the motor drives the transmission mechanism, so that the lock rod on the steering shaft lock extends out and engages with the steering shaft to lock the steering shaft; or retracts from the steering shaft, Unlock the steering shaft. For example, a steering shaft lock in the prior art includes a lock body, a driving part (motor), a rotating shaft, a lock block, a locking lever and a bushing, and the rotating shaft uses the rotational driving force of the driving part to rotate through a gear mechanism , the lock block moves in the axial direction by screwing with the above-mentioned rotating shaft and rotating, and the lock lever moves between the locked position for locking the steering shaft and the unlocked position for unlocking by the movement of the lock block. The shaft sleeve has a bearing part, a claw part of the installation part and a bearing claw part. The bearing part bears the axial load of the above-mentioned rotating shaft by at least one end of the above-mentioned rotating shaft. The mounting claw part is inserted into the above-mentioned lock by fitting. The bearing claw is mounted in the hole of the body, and the bearing claw is rotatably and slidably fitted to the outer diameter of the rotating shaft and receives a radial load. The above-mentioned steering shaft lock can reliably realize the operation of locking and unlocking the steering shaft, but it needs to be provided with complex-structured sleeves for supporting the rotating shaft at both ends of the rotating shaft. Corresponding structure is arranged on the lock cover and is used for installing described axle sleeve, so causes the whole steering shaft lock parts to increase, and structure is complicated, and processing and assembling is comparatively difficult.

Contents of the invention

The present invention provides a steering shaft lock with a simple structure and relatively easy processing and assembly to solve the problems of the above-mentioned steering shaft lock with complex structure and relatively difficult processing and assembly.

A steering shaft lock provided by the present invention comprises: a lock body, an end cover, a driving source, a worm and a gear assembly, the lock body has a lock chamber with one end open, and the end cover covers the opening of the lock body The drive source is arranged on the end cover, the worm is installed on the drive shaft of the drive source and can rotate with the drive shaft, the gear assembly is rotatably supported on the end cover and meshed with the worm; the drive The source, the worm and the gear assembly are all accommodated in the lock cavity; the steering shaft lock also includes a lock lever and a transmission mechanism combined with the steering shaft to lock or unlock the steering shaft, and the transmission mechanism is threadedly combined with the gear assembly And the power of the above-mentioned driving source is transmitted to the locking rod; the lock body is also provided with a locking hole, and the locking rod can be linearly reciprocated between the locked and unlocked positions and is restricted in the locking hole. Among them; wherein, the transmission mechanism includes a threaded rod, one end of the threaded rod is provided with an external thread or an internal thread, and the other end is provided with a pin shaft, and the threaded rod is connected with the locking rod through the pin shaft; the gear assembly includes A gear and a gear rotating shaft supporting the gear, the gear rotating shaft has an internal thread or an external thread, and is installed in cooperation with the external screw or internal thread of the above-mentioned threaded rod to drive the threaded rod, and the threaded rod is limited by the lock rod Make linear reciprocating movement along its axis direction.

The beneficial effects of the present invention are: since the gear assembly is directly threadedly combined with the threaded rod, and the threaded rod is restricted by the locking rod that can only reciprocate in a straight line in the locking hole, the rotational movement between the gear assembly and the threaded rod is directly It is converted into a return movement of the threaded rod along its axial direction, and then drives the locking rod to reciprocate in the locking hole to realize the locking and unlocking operations of the steering shaft lock. It can be seen that the steering shaft lock of the present invention realizes the reduction of components, so that the overall structure is simple, and the processing and assembly become simpler and easier.

Description of drawings

Fig. 1 is an exploded schematic diagram of an embodiment of a steering shaft lock of the present invention;

Fig. 2 is a schematic structural view of a lock body of an embodiment of a steering shaft lock of the present invention;

Fig. 3 is a structural schematic diagram of a lock body of an embodiment of a steering shaft lock of the present invention;

Fig. 4 is a schematic structural view of an end cover of an embodiment of a steering shaft lock of the present invention;

Fig. 5 is a partial structural schematic diagram of an embodiment of a steering shaft lock of the present invention;

Fig. 6 is a structural schematic diagram of a locking lever of an embodiment of a steering shaft lock of the present invention;

Fig. 7 is a structural schematic diagram of a threaded rod of an embodiment of a steering shaft lock of the present invention;

Fig. 8 is a schematic cross-sectional view of an embodiment of a steering shaft lock of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In addition, it should be noted that the terms used in the description of the present invention and terms related to positional relationship are only for the convenience of the description of the present invention, and should not be construed as limiting the present invention.

As an embodiment of the present invention, as shown in Fig. 1, Fig. 4, Fig. 7 and Fig. 8, a steering shaft lock includes: a lock body 1, an end cover 2, a driving source 3, a worm 4, and a gear assembly; The lock body 1 includes a lock cavity 101 with an open end, and a first mounting portion 201 and a second mounting portion 202 are formed on one surface of the end cover 2, the surface faces the lock cavity 101 and covers the The opening of the lock body 1; the driving source 3 is installed on the first mounting part 201, the worm 4 is installed on the driving shaft of the driving source 3 and can rotate synchronously with the driving shaft, and the gear assembly is rotatably supported on On the second mounting part 202 and engaged with the worm 4; the drive source 3, the worm 4 and the gear assembly are all accommodated in the lock cavity 101; the steering shaft lock also includes a combination with the steering shaft and locking or The unlocked lock bar 5 and the transmission mechanism, the transmission mechanism is threadedly combined with the gear assembly and transmits the power of the above-mentioned driving source 3 to the lock bar 5; the lock body 1 is also provided with a locking hole 102, the lock The rod 5 is restricted in the locking hole 102 in a linear reciprocating manner between the locking position and the unlocking position, and the locking hole 102 is guided and supported by the locking rod 5; wherein, the The transmission mechanism includes a threaded rod 6, one end of the threaded rod 6 is provided with an external thread or an internal thread, and the other end is provided with a pin 7, and the threaded rod 6 is connected with the locking rod 5 through the pin 7; the gear assembly Including a gear 8 and a gear shaft 9 supporting the gear 8, the gear shaft 9 has an internal thread or an external thread, and is fitted with the external screw or internal thread of the above-mentioned threaded rod 8 to drive the threaded rod 8. The threaded rod 8 reciprocates along its axial direction under the restriction of the locking rod 5 . In the embodiment of the present invention, the threaded rod 6 adopts an external thread, and the gear shaft 9 is set as an internal thread; the driving source 3 is a motor. Since the gear assembly is directly threadedly combined with the threaded rod 6, and the threaded rod 6 is restricted by the locking rod 5 that can only reciprocate in a straight line in the locking hole, the rotational motion between the gear assembly and the threaded rod 6 is directly converted into a screw thread. The linear return movement of the rod 6 along its axial direction drives the reciprocating movement of the locking rod 5 in the locking hole 102 to realize the operation of locking and unlocking the steering shaft lock, and realizes the reduction of parts, so that the overall structure is simple , processing and assembly becomes simpler and easier.

Please refer to Fig. 5 and Fig. 6 together, as a preferred embodiment, the transmission mechanism also includes a guide rod 10, and one end of the threaded rod 6 provided with a pin 7 is fixedly connected with the guide rod 10, and the pin The shaft 7 runs through the guide rod 10 transversely, and its two ends protrude from the guide rod 10 , and are connected with the lock rod 5 . One end of the lock bar 5 has two extension walls 502 extending from the two side walls of the lock bar body 501, and the two extension walls 502 each have a waist-shaped hole 503 arranged along the movement direction of the lock bar 5. The guide rod 10 is movably connected between the extension walls 502 of the locking rod 5 through the cooperation of the pin shaft 7 and the waist-shaped hole 503 .

The transmission mechanism also includes a first spring 14, and a spring hole 504 is provided at the rear end of the locking rod body 501. One end of the first spring 14 is pressed against the threaded rod 6, and the other end is inserted and pressed against the threaded rod 6. Inside the spring hole 504. The first spring 14 always exerts a force on the locking rod 5 to push the locking rod 5 away from the threaded rod 6 .

Please refer to Fig. 2 and Fig. 3 together. As a preferred embodiment, the lock body 1 can also have a support structure 13, and the support structure 13 is from the periphery of the locking hole 102 on the lock body 1 to the A frame structure formed by extending in the direction of the opening, the lock bar 5 and the guide bar 10 are supported in the support structure 13 along the moving direction of the lock bar 5 , and the end of the support structure 13 away from the locking hole 102 The gear 8 extending close to the gear assembly can limit the gear 8 along its axial direction. The support structure 13 includes four side walls, which can be defined as an upper wall 137 , a bottom wall 138 and two vertical walls 139 . A first channel 131 is opened on one side wall (ie, the bottom wall 138 ) of the support structure 13 , and the first channel 131 extends from the locking hole 102 to the direction away from the locking hole 102 to the bottom wall 138 . One end of the guide rod 10 passes through the above-mentioned first channel 131 .

The steering shaft lock also includes a circuit board box 11 installed in the lock chamber 101 corresponding to the bottom wall 138 provided with the first passage 131, and a circuit board 12 is mounted on the circuit board box 11. And the circuit board box 11 has a first guide groove 111 corresponding to the first passage 131, and the end of the guide rod 10 passing through the first passage 131 is movably extended into the first passage 131. inside the first guide groove 111. The driving source 3 is electrically connected to the circuit board 12 of the circuit board box 11 . A magnet for detecting the position of the guide rod 10 is installed at one end of the guide rod 10 that is matched with the first guide groove 111 . The above-mentioned first channel 131 is provided to allow a space for the end of the guide rod 10 equipped with a magnet, so that it can extend into the first guide groove 111 of the circuit board box 11 through the first channel 131 , used to detect the current position of the guide rod 10.

On the inner side of the two vertical walls 139 adjacent to the bottom wall 138 opening the first passage 131 of the support structure 13 and at the end far away from the first passage 131 are respectively provided with corresponding protrusions 132 . Between the two protrusions 132 of the support structure 13 and the first channel 131 is formed a second channel 133 through which the locking rod 5 passes, the second channel 133 is opposite to the locking hole 102 and connected. A step portion 134 supporting the locking rod 5 is formed between the second channel 133 and the first channel 131 of the supporting structure 13 . The protrusion 132 and the stepped portion 134 are disposed on the front portion 1300 of the supporting structure 13 close to the locking hole 102 . In addition to the aforementioned locking hole 102 , the provision of the aforementioned step portion 134 can more effectively guide and support the locking bar 5 . A second guide groove 135 is formed at the upper position of the support structure 13 above the second channel 133 (that is, the side away from the second guide channel), and the second guide groove 135 extends to the locking hole 102 and It is located directly above the locking hole 102 . The second guide groove 135 communicates with the first channel 131 and the second channel 133 so that the guide rod 10 is movably accommodated therein.

As shown in FIG. 5 , the other end of the guide rod 10 matching with the first guide groove 11 is provided with a guide wall 100 , and the guide wall 100 is slidably disposed in the second guide groove 135 . The setting of the second guide groove 135 can limit and guide the guide wall 100 from the vertical direction and the horizontal direction, so that the guide wall 100 can only reciprocate in the moving direction of the locking rod 5 , so that the guide rod 10 can only move back and forth in the direction of movement of the lock rod 5, so that the lock rod 5 can only move linearly.

As a preferred embodiment, one end of the gear shaft 9 is supported in the gear shaft hole 2023 of the second installation part 202 , and the other end is provided with an internal thread. The gear 8 is preferably a helical gear. Likewise, the gear 8 and the gear shaft 9 can be integrally formed, or assembled together by combination. In this preferred embodiment, the gear 8 and the gear shaft 9 are assembled together by combination.

As a preferred embodiment, as shown in FIG. 1 , the steering shaft lock further includes a pressing assembly, and the pressing assembly includes a positioning cover 16 and a second spring 17 for limiting the axial movement of the gear 8 , The periphery of the second installation part 202 has at least two protruding card platforms 2020 arranged at intervals or at equal intervals. The positioning cover 16 is provided with a card slot 160 that matches the upper card platform 2020. The positioning cover 16 is engaged and mounted on the second mounting portion 202 . The positioning cover 16 is adjacent to the support structure 13 and located between the gear 8 and the support structure 13 . The positioning cover 16 has a through hole 161 through which the gear shaft 9 passes.

One end with an internal thread of the gear shaft 9 , the threaded rod 6 , and the second spring 17 can be accommodated in the rear portion 1301 of the support structure 13 away from the locking hole 102 . The second spring 17 is sleeved on the gear shaft 9 and the threaded rod 6 , one end of the second spring 17 abuts against the positioning cover 16 , and the other end abuts against the front section 1300 of the support structure 13 A second stepped portion 1302 is formed between it and the rear portion 1301 . The second spring 17 applies a force toward the second mounting portion 202 to the positioning cover 16 . The pressing assembly can more effectively limit the position of the gear assembly.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (16)

1. A steering shaft lock, comprising: a lock body, an end cover, a drive source, a worm and a gear assembly, the lock body has a lock cavity with an open end, and the end cover covers the opening of the lock body; The drive source is arranged on the end cover, the worm is installed on the drive shaft of the drive source and can rotate with the drive shaft, the gear assembly is rotatably supported on the end cover and meshed with the worm; the drive source, Both the worm and the gear assembly are accommodated in the lock cavity; The steering shaft lock also includes a locking rod combined with the steering shaft and locking or unlocking the steering shaft and a transmission mechanism, the transmission mechanism is threadedly combined with the gear assembly and transmits the power of the above-mentioned driving source to the locking rod; the lock The body is also provided with a locking hole, and the locking rod is restricted in the locking hole in a linear reciprocating movement between locked and unlocked positions; It is characterized in that: the transmission mechanism includes a threaded rod, one end of the threaded rod is provided with an external thread or an internal thread, and the other end is provided with a pin, and the threaded rod is connected to the locking rod through the pin; The gear assembly includes a gear and a gear shaft supporting the gear. The gear shaft has internal or external threads, and is fitted with the external or internal threads of the threaded rod to drive the threaded rod. The threaded rod Under the restriction of the lock bar, it can move linearly and reciprocally along its axis direction. 2. The steering shaft lock according to claim 1, characterized in that: the lock body also has a support structure, and the support structure is formed by extending from the periphery of the locking hole on the lock body to the opening direction Framework. 3. The steering shaft lock according to claim 2, wherein the transmission mechanism further comprises a guide rod, one end of the threaded rod provided with a pin is fixedly connected to the guide rod, and the pin traverses through the The guide rod is connected with the lock rod; the lock rod and the guide rod are movably supported in the support structure along the moving direction of the lock rod. 4. The steering shaft lock according to claim 2, wherein an end of the supporting structure away from the locking hole extends to a gear adjacent to the gear assembly. 5. The steering shaft lock according to claim 3, wherein a first passage is opened on a side wall of the support structure, and the first passage extends from the locking hole to a direction away from the locking hole To the end of the side wall, one end of the guide rod passes through the above-mentioned first channel. 6. The steering shaft lock according to claim 5, characterized in that, the steering shaft lock further comprises a circuit board box installed in the lock chamber corresponding to the side wall provided with the first channel , the circuit board box has a first guide groove corresponding to the first passage, and the end of the guide rod passing through one end of the first passage movably extends into the first guide groove Inside. 7. The steering shaft lock according to claim 3, characterized in that: one end of the lock rod has two extension walls extending from the two side walls of the lock rod body, and each of the two extension walls has a A waist-shaped hole is provided in the moving direction of the lock rod, and the guide rod is movably connected between the extension walls of the lock rod by cooperating with the waist-shaped hole through a pin shaft. 8. The steering shaft lock according to claim 3, wherein the transmission mechanism further comprises a first spring, a spring hole is arranged at the rear end of the lock lever body, and one end of the first spring abuts against the On the threaded rod, the other end is inserted and abutted against the spring hole. 9. The steering shaft lock according to claim 5, characterized in that: on the inside of the two side walls of the support structure adjacent to the side wall opening the first channel and located away from the first channel One end of each is provided with a corresponding protrusion. 10. The steering shaft lock according to claim 9, characterized in that: a second passage for the lock rod to pass is formed between the protrusion of the support structure and the first passage, and the second passage is connected to the first passage. The locking hole is opposite to and communicated with; a step portion supporting the locking rod is formed between the second channel and the first channel of the supporting structure. 11. The steering shaft lock according to claim 10, characterized in that: a second guide groove is formed at the position above the second channel of the support structure, and the other end of the guide rod that cooperates with the first guide groove is provided There is a guide wall, and the guide wall is slidably arranged in the second guide groove; the second guide groove, the first channel and the second channel are connected. 12. The steering shaft lock according to claim 1, characterized in that: the side of the lock cover facing the lock cavity is provided with a first installation part and a second installation part, and the driving source is installed on the first installation part; The gear assembly is installed on the second installation part, one end of the gear shaft is supported in the gear shaft hole of the second installation part, and the other end is provided with an internal thread or an external thread. 13. The steering shaft lock according to claim 1, wherein the gear is a helical gear. 14. The steering shaft lock according to claim 2, characterized in that: the steering shaft lock further comprises a pressing assembly, and the pressing assembly includes a positioning cover and a second spring for restricting the axial movement of the gear , the positioning cover is installed on the second mounting part and adjacent to the support structure, the second spring is sleeved on the gear shaft and the threaded rod, and one end of it is against the positioning cover, The other end is against the supporting structure. 15. The steering shaft lock according to claim 14, wherein the positioning cover has a through hole through which the gear shaft and the threaded rod pass. 16. The steering shaft lock according to claim 14, characterized in that: the periphery of the second mounting part has at least two protruding latches arranged at intervals, and the positioning cover is provided with a Match the card slot.

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