Speed reducer for door lock and lock body

Abstract

The utility model discloses a speed reducer for a door lock. The speed reducer comprises a first gear assembly and a second gear assembly, the first gear assembly comprises a shaft body assembly which comprises a shaft body and a metal part, the shaft body and the metal part are integrally formed, and the metal part is provided with an open groove; the first gear comprises a first shaft hole, a clamping spring is arranged on the periphery of the first shaft hole, one end of the metal part penetrates through the first shaft hole, and the clamping spring abuts against the open groove. The speed reducer provided by the utility model has higher connection strength, is not easy to loosen and lose efficacy, can provide larger output torque, and is long in service life. The utility model further provides a lock body using the speed reducer.

Description

Technical Field

[0001] The utility model relates to the technical field of door lock reducers, in particular to a reducer and a lock body for a door lock. Background Art

[0002] Currently, reducers used in door locks (such as fully automatic electronic locks) typically consist of a motor and a gearbox working together to provide a high torque output. The transmission gears in these reducers are typically connected to the gear shaft and gears using riveting. Specifically, a connecting sleeve (e.g., a copper sleeve) is placed on the outer surface of the gear shaft. After the gear shaft and gear are assembled, the copper sleeve is flanging to ensure that the flange engages with the gear or a gasket (e.g., a retaining ring) on the gear, thereby achieving axial position control.

[0003] However, this riveted connection has low strength, resulting in reduced output torque and increased risk of failure. Furthermore, the flanging process can be uneven, leading to loose components and failure. Therefore, a reducer with higher strength is urgently needed. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of low gear connection strength in existing door lock reducers. The utility model provides a reducer and lock body with high connection strength, which is not easy to loosen and fail, and can provide large output torque and long service life.

[0005] To solve the above technical problems, the embodiments of the present utility model disclose a reducer for a door lock, comprising:

[0006] a first gear assembly;

[0007] The first gear assembly comprises:

[0008] The shaft assembly comprises a shaft and a metal portion, wherein the shaft and the metal portion are integrally formed, and the metal portion is provided with a slot;

[0009] The first gear includes a first shaft hole. A retaining spring is provided around the first shaft hole. One end of the metal part is passed through the first shaft hole, and the retaining spring abuts against the slot.

[0010] When processing and manufacturing the shaft assembly, the traditional riveting method is usually adopted, that is, a metal part (such as a copper sleeve) is processed separately, and the copper sleeve is wrapped around the outer surface of the shaft. After the two are assembled with the gear, the end of the copper sleeve is flanging processed. That is to say, for example, a riveting machine is used to process the part of the copper sleeve extending out of the gear into a flange with a certain angle (i.e., a flanging), and the flange can be clamped and limited with the gear surface or a gasket (such as a retaining spring) provided on the gear surface.

[0011] However, this connection method has high requirements for the processing and assembly accuracy of the shaft and copper sleeve, and the uniformity of the flange is difficult to guarantee. For example, if the flange is narrow, it is easy to loosen from the gear, causing the reducer to fail, and the connection strength is not high.

[0012] By adopting the above technical solution, the shaft and metal part of the shaft assembly are integrally formed, that is, the shaft and metal part are directly integrally formed without assembly and without joints, providing a basis for reducing errors in subsequent assembly (i.e. assembly with the first gear).

[0013] At the same time, a slot is opened in the metal part, and one end of the shaft assembly is passed through the retaining spring at the first shaft hole of the first gear. During this process, the slot of the metal part of the shaft assembly can abut against the retaining spring to achieve axial limitation, and the assembly process is simple.

[0014] Based on this, the integrally formed shaft assembly is fixed to the retaining spring provided on the first gear, eliminating the defects of traditional riveting methods, such as high processing and assembly errors, and uneven copper sleeve flanging that can lead to loosening and failure. It also enhances the output torque of the first gear assembly. As a result, the reducer of the present embodiment has enhanced strength and a stable lifespan.

[0015] According to another specific embodiment of the present invention, the first gear assembly also includes a second gear, which is used to connect to an external load; along the axial direction, the second gear is arranged opposite to the first gear, and the second gear includes a second axial hole, and the other end of the metal part is passed through the second axial hole and connected to the second axial hole.

[0016] According to another specific embodiment of the present invention, the slot is arranged around the metal part, and the retaining spring includes a first part and a second part, the first part is used to connect with the first gear, one side of the second part is connected to the second part at an angle, and the other side of the second part abuts against the slot.

[0017] According to another specific embodiment of the present utility model, the first gear is provided with a sinking platform, the sinking platform has a sinking surface, the first part of the retaining spring is connected to the sinking surface; the sinking surface defines the first axial hole, and the second part of the retaining spring defines a through hole, and the through hole corresponds to the first axial hole.

[0018] According to another specific embodiment of the present invention, the first gear assembly further includes a protective sleeve, which surrounds a portion of the shaft assembly and covers a portion of the retaining spring.

[0019] According to another specific embodiment of the present invention, the protective cover is made of rubber.

[0020] According to another specific embodiment of the present invention, the reducer further includes:

[0021] A driving member, provided with a driving shaft, wherein the driving member is used to drive the driving shaft to rotate;

[0022] a second gear assembly meshing with the drive shaft;

[0023] The third gear assembly is meshed with the second gear assembly and the first gear assembly respectively.

[0024] According to another specific embodiment of the present invention, the third gear assembly includes multiple third gear assemblies, the multiple third gear assemblies are meshed in sequence, and one of the multiple third gear assemblies is meshed with the second gear assembly, and another one of the multiple third gear assemblies is meshed with the first gear assembly.

[0025] An embodiment of the present utility model further discloses a lock body, comprising an inner lock component and a reducer as described in any of the above embodiments, wherein the first gear assembly of the reducer is connected to the inner lock component.

[0026] According to another specific embodiment of the present invention, the lock inner assembly includes a connected square tongue and a square tongue gear, and the second gear of the first gear assembly is meshed with the square tongue gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A A front view of a lock body according to an embodiment of the present invention is shown.

[0028] Figure 1B A three-dimensional diagram of a reducer according to an embodiment of the present invention is shown.

[0029] Figure 1C Showing the three-dimensional reducer of the embodiment of the utility model Figure 2 .

[0030] Figure 2 A top view of a reducer according to an embodiment of the present invention is shown.

[0031] Figure 3 A perspective view of the first gear assembly in the reducer according to an embodiment of the present invention is shown.

[0032] Figure 4 A three-dimensional diagram showing the first gear assembly in the reducer of the embodiment of the present utility model Figure 2 .

[0033] Figure 5 A cross-sectional view of the first gear assembly in the reducer according to an embodiment of the present invention is shown.

[0034] Figure 6A three-dimensional diagram of the shaft assembly of the reducer according to an embodiment of the present invention is shown.

[0035] Figure 7 A three-dimensional diagram of the first gear in the reducer according to an embodiment of the present invention is shown.

[0036] Figure 8 The three-dimensional diagram of the first gear in the reducer of the embodiment of the utility model is shown. Figure 2 .

[0037] Figure 9 Schematic diagram 1 showing the connection of the shaft assembly, the retaining spring and the protective sleeve in the reducer according to an embodiment of the present invention.

[0038] Figure 10 Schematic diagram showing the connection between the shaft assembly, the retaining spring and the protective sleeve in the reducer of the utility model embodiment Figure 2 . DETAILED DESCRIPTION

[0039] The following is an explanation of the implementation of the present invention by means of specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide an in-depth understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0040] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0041] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0042] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0043] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0045] refer to Figure 1A The embodiment of the present application provides a lock body 1000, which is a mechanical device that can control the switching of an object between a locked state and an unlocked state. The lock body 1000 of the embodiment of the present application includes but is not limited to biometric locks, remote control locks, mechanical fully automatic locks, comprehensive fully automatic locks, and other devices that can automatically open and lock the door body.

[0046] It can be seen that the interior of the lock body 1000 includes a speed reducer 100 and a lock inner component 200 connected to each other.

[0047] Illustratively, the lock inner assembly 200 includes a tongue 210 and a tongue gear 220 for driving the tongue 210. The tongue 210 is the primary locking element in the lock body 1000, and the tongue gear 220 is the driving gear of the tongue 210, for driving the tongue 210 to extend (i.e., insert into the door frame in a locked state) or retract (i.e., disengage from the door frame in an open state).

[0048] In this embodiment of the present application, the tongue gear 220 meshes with the reducer 100 (described in detail later). Specifically, the reducer 100 is used to drive and control the tongue 210. For example, the reducer 100 can reduce the speed of its internal drive element (e.g., a motor) to regulate the movement of the tongue 210, preventing damage to the lock body 1000 caused by rapid extension or retraction of the tongue 210. Simultaneously, the reducer 100 also increases torque, enabling the tongue 210 to overcome greater resistance, thereby ensuring stable extension and retraction of the tongue 210.

[0049] Continue to refer Figure 1A For example, the lock body 1000 of the embodiment of the present application further includes: a circuit board 230 , which is installed inside the lock body 1000 , and the driving component (such as a motor) inside the above-mentioned reducer 100 is electrically connected to the circuit board 230 .

[0050] refer to Figure 1B and Figure 1C , Figure 1B and Figure 1C The three-dimensional views of the reducer 100 at different viewing angles are shown respectively.

[0051] As can be seen, the reducer 100 includes a housing 110 and a driving member 120. The housing 110 includes a first housing 111 at the top and a second housing 112 at the bottom. A portion of the driving member 120 is located inside the housing 110, and another portion of the driving member 120 is exposed to the first housing 111.

[0052] For example, Figure 1B As shown, the driving member 120 includes a cable 121, further combined with Figure 1A , the cable 121 of the driving member 120 is electrically connected to the circuit board 230 in the lock body 1000 .

[0053] The reducer 100 according to the embodiment of the present application will be described in detail below.

[0054] refer to Figure 2 , Figure 2 A top view of the reducer 100 is shown as an example, wherein: Figure 2 The top first shell is omitted.

[0055] The reducer 100 of the embodiment of the present application includes: a first gear assembly 130. Exemplarily, the first gear assembly 130 is an output gear set of the reducer 100.

[0056] refer to Figure 3 and Figure 4 , Figure 3 and Figure 4 A perspective view of the first gear assembly 130 of the speed reducer is shown respectively.

[0057] It can be seen that the first gear assembly 130 includes: a shaft assembly 131 and a first gear 132. Exemplarily, the shaft assembly 131 includes a shaft assembly 131 along the axial direction (such as Figure 3 and Figure 4 The first end portion 1313 (as shown in the Z direction) is relatively arranged Figure 3 as shown) and the second end 1314 (as shown Figure 4 The first end portion 1313 is connected to the first gear 132.

[0058] refer to Figure 5 and Figure 6 , Figure 5 A cross-sectional view of a reducer is shown as an example; Figure 6 A perspective view of the shaft assembly 131 is shown as an example.

[0059] like Figure 5As shown, the shaft assembly 131 includes a shaft 1311 and a metal portion 1312, and the shaft 1311 and the metal portion 1312 are integrally formed (in Figure 5 In the figure, the metal part 1312 is located on the outside of the shaft body 1311), that is, during processing, the shaft body assembly 131 is formed in a single process, and the shaft body 1311 and the metal part 1312 are formed into a continuous and complete structure. There are no splicing points or welding points on the surface and inside of the shaft body assembly 131.

[0060] like Figure 6 As shown, further, the metal portion 1312 is provided with a slot 13121. Exemplarily, the slot 13121 is provided around the metal portion 1312.

[0061] refer to Figure 7 and Figure 8 , Figure 7 and Figure 8 A perspective view of the first gear 132 is shown, wherein: Figure 8 The circlip 133 provided on the first gear 132 is also shown as an example.

[0062] The first gear 132 is the input gear of the first gear assembly 130. Figure 7 As shown, the first gear 132 includes a first shaft hole 1320. Figure 8 As shown, a retaining spring 133 is provided around the first shaft hole 1320 .

[0063] refer to Figure 3 and Figure 5 Combined with Figure 7 and Figure 8 The first end portion 1313 of the shaft assembly 131 is passed through the first shaft hole 1320 and is fixedly connected to the retaining spring 133 .

[0064] Specifically, when the first end portion 1313 is inserted into the first shaft hole 1320, the slot 13121 of the shaft assembly 131 (i.e., the metal portion 1312) can abut against the retaining spring 133, thereby limiting the shaft assembly 131 from moving in the axial direction away from the second end portion 1314 (i.e., Figure 5 Z1 direction) movement shown in .

[0065] It should be noted that the second end portion 1314 of the shaft assembly 131 further includes a limiting portion 13141, which is used to abut against the second gear 134 described later to limit the shaft assembly 131 in the axial direction and in the direction toward the second end portion 1314 (i.e. Figure 5 Z2 direction) movement shown in .

[0066] refer to Figure 8 and Figure 9The above-mentioned retaining spring 133 includes a first portion 1331 and a second portion 1332. Figure 8 As shown, the first portion 1331 is used to connect with the first gear 132, as shown in FIG. Figure 9 As shown, one side of the second portion 1332 is connected to the first portion 1331 at an angle, and the first portion 1331 is disposed around the second portion 1332 , and the other side of the second portion 1332 abuts against the above-mentioned slot 13121 .

[0067] refer to Figure 7 and Figure 8 , further, in some possible implementations, such as Figure 7 As shown, the first gear 132 is provided with a sinking platform 1321, and the sinking platform 1321 has a sinking surface 13211. It can be seen that the above-mentioned first part 1331 of the retaining spring 133 is carried on the sinking surface 13211, and the four sides of the first part 1331 are in contact with the side wall of the sinking platform 1321.

[0068] Furthermore, the sunken surface 13211 defines a first shaft hole 1320 , and the second portion 1332 defines a through hole 1330 , which corresponds to the first shaft hole 1320 so as to allow the shaft assembly to pass through.

[0069] refer to Figures 2 to 5 When manufacturing the shaft assembly 131, a traditional riveting method is usually used. That is, a metal part 1312 (such as a copper sleeve) is separately processed and wrapped around the outer surface of the shaft 1311. After the two are assembled with the gear, the end of the copper sleeve is flanging. In other words, for example, a riveting machine is used to process the portion of the copper sleeve that protrudes from the gear into a flange with a certain angle (i.e., a flange, not shown in the figure). This flange can be engaged with the gear surface or a gasket (such as a retaining spring 133) provided on the gear surface to limit the position. On the other hand, the other end of the shaft 1311 usually has a limiting portion 13141, which is used to abut against another gear (such as the second gear described below) to achieve axial positioning of the shaft assembly 131.

[0070] However, this connection method has high requirements on the processing accuracy and assembly accuracy of the shaft 1311 and the copper sleeve, and the uniformity of the flange is difficult to ensure. For example, if the flange is narrow, it is easy to loosen from the gear, causing the reducer 100 to fail, and the connection strength is not high.

[0071] By adopting the above technical solution, the shaft 1311 and the metal part 1312 of the shaft assembly 131 are integrally formed, that is, the shaft 1311 and the metal part 1312 are directly integrally formed without assembly and without joints, providing a basis for reducing errors in subsequent assembly (i.e., assembly with the first gear 132).

[0072] At the same time, the metal part 1312 is provided with a slot 13121, and one end of the shaft assembly 131 is passed through the retaining spring 133 at the first shaft hole of the first gear 132. During this process, the slot 13121 of the metal part 1312 of the shaft assembly 131 can abut against the retaining spring 133 to achieve axial limitation, and the assembly process is simple.

[0073] Based on this, the integrally formed shaft assembly 131 is fixed to the retaining spring 133 provided on the first gear 132, eliminating the defects of traditional riveting methods, such as high processing and assembly errors, and the uneven flanging of the copper sleeve, which can lead to loosening and failure. At the same time, it also enhances the output torque of the first gear 132 assembly. As a result, the reducer 100 of the embodiment of the present application has enhanced strength and a stable lifespan.

[0074] refer to Figure 2 In some possible implementations, the reducer 100 further includes: a second gear assembly 140 and two third gear assemblies 150. Meanwhile, the driving member 120 is further provided with a driving shaft 122, and the driving member 120 can drive the driving shaft 122 to rotate.

[0075] like Figure 2 As shown, the second gear assembly 140 is meshed with the drive shaft 122, along the torque transmission direction of the reducer 100 (such as Figure 2 In the direction a shown in FIG), the second gear assembly 140, the two third gear assemblies 140, and the first gear assembly 130 are meshed in sequence.

[0076] Although Figure 2 A first gear assembly 130, a second gear assembly 140 and two third gear assemblies 150 are shown in the figure, but the embodiment of the present application does not impose specific restrictions on the number of the first gear assembly 130, the second gear assembly 140 and the third gear assembly 150, for example, one, two, three, five or the like can be set respectively.

[0077] refer to Figure 3 and Figure 4 Combined with Figure 1A In some possible embodiments, the first gear assembly 130 further includes a second gear 134, which is an output gear of the first gear assembly 130 and is used to connect to an external load (such as the tongue gear 220 of the lock body 1000 mentioned above).

[0078] refer to Figure 1C Combined with Figure 1A and Figure 3It can be seen that the second housing 112 of the reducer 100 has an opening 1120 , which corresponds to the second gear 134 of the first gear assembly 130 , so that a portion of the second gear 134 is exposed to the second housing 112 .

[0079] like Figure 1A As shown, the opening 1120 corresponds to the tongue gear 220. Figure 1A The opening 1120 and the second gear 134 are not clearly shown, but in combination Figure 1C and Figure 3 It can be understood that the second gear 134 exposed to the opening 1120 is engaged with the tongue gear 220, so that the reducer 100 can act on the tongue gear 220 and the tongue 210 connected to the tongue gear, thereby controlling and driving the locking and opening states of the lock body 1000.

[0080] refer to Figure 3 and Figure 4 , along the axial direction (such as Figure 3 and Figure 4 The second gear 134 is arranged opposite to the first gear 132 , and the second gear 134 includes a second shaft hole 1340 , through which the second end portion 1314 of the shaft assembly 131 is passed and connected.

[0081] refer to Figure 9 and Figure 10 Combined with Figure 3 In some possible implementations, the first gear assembly 130 further includes a protective sleeve 135 , which surrounds a portion of the shaft assembly 131 , with the first end 1313 and the second end 1314 of the shaft assembly 131 exposed outside the protective sleeve 135 .

[0082] At the same time, the protective cover 135 surrounds and wraps the first portion 1331 of the retaining spring 133 and a portion of the second portion 1332. For example, the protective cover 135 is made of rubber.

[0083] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above description is provided to further illustrate the present invention in conjunction with specific embodiments, and that the present invention should not be construed as being limited to these descriptions. Those skilled in the art may make various changes in form and detail, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A reducer for a door lock, characterized in that: include: a first gear assembly; The first gear assembly comprises: The shaft assembly comprises a shaft and a metal portion, wherein the shaft and the metal portion are integrally formed, and the metal portion is provided with a slot; The first gear includes a first shaft hole. A retaining spring is provided around the first shaft hole. One end of the metal part is passed through the first shaft hole, and the retaining spring abuts against the slot.

2. The reducer according to claim 1, characterized in that The first gear assembly also includes a second gear, which is used to connect to an external load; along the axial direction, the second gear is arranged opposite to the first gear, and the second gear includes a second axial hole, and the other end of the metal part is passed through the second axial hole and connected to the second axial hole.

3. The reducer according to claim 1, characterized in that The slot is arranged around the metal part, and the retaining spring includes a first part and a second part, the first part is used to connect with the first gear, one side of the second part is connected to the second part at an angle, and the other side of the second part abuts against the slot.

4. The reducer according to claim 3, characterized in that The first gear is provided with a sinking platform, the sinking platform has a sinking surface, the first part of the retaining spring is connected to the sinking surface; the sinking surface defines the first axial hole, the second part of the retaining spring defines a through hole, and the through hole corresponds to the first axial hole.

5. The reducer according to claim 1, characterized in that: The first gear assembly further includes a protective sleeve, which surrounds a portion of the shaft assembly and covers a portion of the retaining spring.

6. The reducer according to claim 5, characterized in that: The protective cover is made of rubber.

7. The reducer according to claim 1, characterized in that The reducer further includes: A driving member, provided with a driving shaft, wherein the driving member is used to drive the driving shaft to rotate; a second gear assembly meshing with the drive shaft; The third gear assembly is meshed with the second gear assembly and the first gear assembly respectively.

8. The reducer according to claim 7, characterized in that: The third gear assembly includes a plurality of third gear assemblies, and the plurality of third gear assemblies are meshed in sequence. One of the plurality of third gear assemblies is meshed with the second gear assembly, and another one of the plurality of third gear assemblies is meshed with the first gear assembly.

9. A lock body, comprising an inner lock component and the reducer according to any one of claims 1 to 8, wherein the first gear assembly of the reducer is connected to the inner lock component.

10. The lock body according to claim 9, characterized in that: The lock inner component includes a square tongue and a square tongue gear connected to each other, and the second gear of the first gear assembly is meshed with the square tongue gear.

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