One-way transmission shaft and vehicle-mounted turnover screen equipment

Abstract

The utility model discloses a one-way transmission shaft and a vehicle-mounted turnover screen device, the one-way transmission shaft comprises a driving shaft section, a driven shaft section, a constraint sleeve and a pushing assembly, the driving shaft section comprises a first shaft section, a plurality of clamping grooves are formed in the circumferential wall of the first shaft section in the circumferential direction of the driving shaft section, and the driving shaft section is further used for being connected with a power source; the driven shaft section comprises a second shaft section, a plurality of transmission surfaces are arranged on the peripheral wall of the second shaft section in the circumferential direction of the driven shaft section, and the transmission surfaces correspond to the clamping grooves one to one; the restraining sleeve sleeves the first shaft section; the pushing assembly comprises a plurality of pushing parts, the pushing parts correspond to the clamping grooves one to one, and the pushing parts are located in the corresponding clamping grooves and abut against the transmission face so as to drive the pushing parts to push the driven shaft section to rotate when the driving shaft section rotates, and the pushing parts are clamped to the inner wall of the restraining sleeve when the driven shaft section rotates. On the premise that the display screen is locked, the small and exquisite design of the transmission shaft is facilitated.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a one-way transmission shaft and a vehicle-mounted flip screen device. Background Art

[0002] The vehicle-mounted flip screen device is used in vehicles. The vehicle-mounted flip screen device includes a power source, a transmission shaft connected to the power source, and a display screen arranged on the transmission shaft. When the user needs to use the flip screen, the power source can drive the display screen to flip through the transmission shaft for the user to watch. However, when the power source stops, the display screen will shake as the vehicle moves or even return to its initial position.

[0003] In the related art, in order to ensure the viewing stability of the display screen, a damping locking member is provided on the transmission shaft. Since the damping locking member requires a large installation space, it is not conducive to the compact design of the transmission shaft. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a one-way transmission shaft, which can facilitate the compact design of the transmission shaft while locking the display screen.

[0005] In order to solve the above technical problems, in a first aspect, the utility model provides a one-way transmission shaft, which comprises:

[0006] A driving shaft segment, the driving shaft segment includes a first shaft segment, a plurality of slots are arranged on the peripheral wall of the first shaft segment along the circumference of the driving shaft segment, and the driving shaft segment is also used to connect with a power source;

[0007] A driven shaft segment, the driven shaft segment comprising a second shaft segment, and along the circumference of the driven shaft segment, a plurality of transmission surfaces are arranged on an outer peripheral wall of the second shaft segment, and the plurality of transmission surfaces correspond to the plurality of clamping grooves one by one;

[0008] A constraint sleeve, the constraint sleeve is arranged on the first shaft section;

[0009] A pushing assembly, wherein the pushing assembly includes a plurality of pushing members, and the plurality of pushing members correspond one-to-one to the plurality of slots. The pushing members are located in the corresponding slots and abut against the transmission surface, so as to drive the pushing members to push the driven shaft section to rotate when the active shaft section rotates, and the pushing members are locked with the inner wall of the constraint sleeve when the driven shaft section rotates.

[0010] In some possible implementations, the first shaft segment is hollow inside, and the slot passes through a peripheral wall of the first shaft segment;

[0011] The second shaft section is inserted into the first shaft section, one side of the pushing member contacts the transmission surface, and the other side contacts the inner wall of the restraint sleeve.

[0012] In some possible implementations, the driven shaft segment further includes a shaft shoulder, the diameter of the shaft shoulder is larger than the diameter of the second shaft segment, the second shaft segment is connected to the shaft shoulder, and the first shaft segment and the plurality of pushing members are all in contact with the shaft shoulder.

[0013] In some possible implementations, the pushing member is cylindrical, and the width of the slot is less than or equal to the diameter of the pushing member.

[0014] In some possible implementations, the plurality of transmission surfaces are sequentially connected along the circumference of the driven shaft segment, a ridge is provided between each two adjacent transmission surfaces, the ridge protrudes away from the central axis of the driven shaft segment, and the ridge is staggered from the slot.

[0015] In some possible implementations, along the circumference of the driven shaft segment, a middle portion of the transmission surface is recessed toward a central axis of the driven shaft segment.

[0016] In some possible implementations, the transmission surface includes a first plane and a second plane connected to each other, and a connection between the first plane and the second plane is recessed toward a central axis of the driven shaft segment.

[0017] In some possible implementations, the plurality of slots are evenly spaced along the circumference of the driving shaft segment.

[0018] In some possible implementations, a limiting boss is provided on the outer peripheral wall of the constraint sleeve.

[0019] In a second aspect, the utility model further provides a vehicle-mounted flip screen device, the vehicle-mounted flip screen device comprising:

[0020] Power source;

[0021] The one-way transmission shaft of the first aspect, wherein the driving shaft section of the one-way transmission shaft is connected to the power source;

[0022] A display screen is arranged on the driven shaft section of the one-way transmission shaft.

[0023] Compared with the prior art, this application has at least the following beneficial effects:

[0024] Since the multiple pushing members correspond one by one to the multiple slots and the multiple transmission surfaces respectively, the pushing members are located in the corresponding slots and abut against the transmission surfaces, the active shaft section is also used to connect with the power source, and the constraint sleeve is arranged on the first shaft section. Therefore, when the power source drives the active shaft section to rotate, the active shaft section can drive the pushing member to move circumferentially around the active shaft section, thereby driving the driven shaft section to rotate. Therefore, when the power source stops working and the driven shaft section wants to rotate, the pushing member is locked with the inner wall of the constraint sleeve, thereby preventing the driven shaft section from continuing to rotate. Therefore, when the display screen is set on the driven shaft section, when the power source stops working, the display screen can be locked, thereby ensuring the stability of viewing the display screen, while also avoiding excessive increase in the installation space of the one-way transmission shaft, which is conducive to the compact design of the one-way transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the structure of a one-way transmission shaft provided in an embodiment of the utility model;

[0027] Figure 2 An exploded view of a one-way transmission shaft provided in an embodiment of the utility model;

[0028] Figure 3 for Figure 1 One of the sectional views at AA;

[0029] Figure 4 for Figure 1 The second sectional view at AA;

[0030] Figure 5 for Figure 1 The third sectional view at AA;

[0031] Figure 6 for Figure 1 The fourth sectional view at AA;

[0032] Figure 7 A cross-sectional view of a driven shaft section provided in an embodiment of the utility model.

[0033] Description of reference numerals:

[0034] 100-one-way transmission shaft; 110-driving shaft section; 111-first shaft section; 1111-slot; 120-driven shaft section; 121-second shaft section; 1211-transmission surface; 1211a-first plane; 1211b-second plane; 1212-convex ridge; 122-shoulder; 130-restraint sleeve; 131-limiting boss; 140-pushing assembly; 141-pushing member. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0037] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0038] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0039] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0040] The present application is described in detail below through specific embodiments:

[0041] See also Figure 1 and Figure 2 The embodiment of the present application provides a one-way transmission shaft 100, which includes a driving shaft section 110, a driven shaft section 120, a constraint sleeve 130 and a pushing assembly 140, wherein the driving shaft section 110 includes a first shaft section 111, and along the circumference of the driving shaft section 110, a plurality of slots 1111 are arranged on the peripheral wall of the first shaft section 111, and the driving shaft section 110 is also used to connect with a power source; the driven shaft section 120 includes a second shaft section 121, and along the circumference of the driven shaft section 120, a plurality of slots 1111 are arranged on the outer peripheral wall of the second shaft section 121 Transmission surface 1211, multiple transmission surfaces 1211 correspond one-to-one to multiple slots 1111; the constraint sleeve 130 is sleeved on the first shaft section 111; the pushing assembly 140 includes multiple pushing members 141, multiple pushing members 141 correspond one-to-one to multiple slots 1111, the pushing members 141 are located in the corresponding slots 1111 and abut against the transmission surface 1211, so that when the active shaft section 110 rotates, the pushing members 141 drive the driven shaft section 120 to rotate, and when the driven shaft section 120 rotates, the pushing members 141 are locked with the inner wall of the constraint sleeve 130.

[0042] The circumferential direction of the driving shaft section 110 refers to Figure 2 In the direction indicated by the Z arrow, the circumferential direction of the driving shaft segment 110 is the same as the circumferential direction of the driven shaft segment 120 .

[0043] In addition, the above-mentioned multiple refers to three or more than three, for example, the number of the card slot 1111, the pusher 141 and the transmission surface 1211 are all five. Figure 3 , Figure 4 and Figure 5 The pusher 141 includes but is not limited to a cylindrical roller needle, a prismatic rod or other regularly shaped rods. For example, see Figure 3 , the pusher is a cylindrical needle roller, see Figure 4 The pusher is a structure symmetrical about the central axis of the driven shaft section 120, and the structure includes three protrusions, two of which are in contact with the transmission surface 1211, and the other protrusion is inserted into the slot 1111 corresponding to the transmission surface 1211, and Figure 3 and Figure 4 The driven shaft sections 120 in the embodiment are all polygonal columns, and Figure 5 The driven shaft segment 120 is not a polygonal column and is symmetrical about the central axis of the driven shaft segment 120 . The driven shaft segment 120 has two convex structures, both of which are inserted into the slot 1111 . Correspondingly, the pushing member 141 is an irregular structure and is arranged between the convex structure and the slot 1111 .

[0044] Since the plurality of pushers 141 correspond to the plurality of slots 1111 and the plurality of transmission surfaces 1211 respectively, the pushers 141 are located in the corresponding slots 1111 and abut against the transmission surfaces 1211, the active shaft section 110 is connected to the power source, and the constraint sleeve 130 is sleeved on the first shaft section 111. Therefore, when the power source drives the active shaft section 110 to rotate, the active shaft section 110 can drive the pushers 141 to move circumferentially around the active shaft section 110, thereby driving the driven shaft section 120 to rotate. Therefore, when the power source stops working and the driven shaft section 120 wants to rotate, the pushers 141 are locked with the inner wall of the constraint sleeve 130, thereby preventing the driven shaft section 120 from continuing to rotate. Therefore, when the display screen is set on the driven shaft section 120, when the power source stops working, the display screen can be locked, thereby ensuring the stability of the display screen viewing, while also avoiding excessive increase in the installation space of the one-way transmission shaft 100, which is conducive to the compact design of the one-way transmission shaft 100.

[0045] In addition, optionally, the materials of the active shaft segment 110 , the pushing member 141 , the driven shaft segment 120 and the restraining sleeve 130 are all wear-resistant and high-rigidity materials, such as low-carbon steel or medium-carbon steel.

[0046] In addition, there are multiple installation relationships between the first shaft segment 111 and the second shaft segment 121. For example, the second shaft segment 121 is sleeved in the first shaft segment 111, or the second shaft segment 121 and the first shaft segment 111 are in contact with each other. When the second shaft segment 121 is sleeved in the first shaft segment 111, the slot 1111 is a through slot. When multiple pushing members 141 are rollingly arranged in the corresponding slots, the transmission surface 1211 on the second shaft segment 121 is in contact with the corresponding pushing members 141. When the second shaft segment 121 and the first shaft segment 111 are in contact with each other, the multiple pushing members 141 all extend out of the edge of the slot 1111, that is, the multiple pushing members 141 extend out of the end of the first shaft segment 111 toward the second shaft segment 121, and the second shaft segment 121 is inserted in the space enclosed by the multiple pushing members 141. The following is mainly described in detail using the example of the second shaft segment 121 being sleeved in the first shaft segment 111.

[0047] In some possible embodiments, see Figure 2 , Figure 3 and Figure 6 The first shaft segment 111 is hollow inside, and the slot 1111 penetrates the peripheral wall of the first shaft segment 111 ; the second shaft segment 121 is inserted into the first shaft segment 111 , and one side of the pusher 141 contacts the transmission surface 1211 , and the other side contacts the inner wall of the restraint sleeve 130 .

[0048] Based on the above structure, when the active shaft segment 110 rotates, it can drive the pushing member 141 to move circumferentially around the second shaft segment 121 of the driven shaft segment 120, thereby pushing the driven shaft segment 120 to rotate. However, when the driven shaft segment 120 wants to rotate, the transmission surface 1211 of the second shaft segment 121 will push the pushing member 141 to move in a direction away from the rotation center of the driven shaft segment 120, so that the pushing member 141 abuts against the inner wall of the restraint sleeve 130, thereby preventing power from being transmitted to the active shaft segment 110, and then locking the one-way transmission shaft 100 after the power source stops working.

[0049] In addition, optionally, the first shaft segment 111 is cylindrical, the internal space of the first shaft segment 111 is cylindrical, and the second shaft segment 121 is a polygonal prism, for example, a triangular prism, a quadrangular prism, a pentagonal prism, etc.

[0050] In some possible embodiments, see Figure 2 The driven shaft section 120 further includes a shaft shoulder 122 , the diameter of the shaft shoulder 122 is greater than the diameter of the second shaft section 121 , the second shaft section 121 is connected to the shaft shoulder 122 , and the first shaft section 111 and the plurality of pushers 141 are all in contact with the shaft shoulder 122 .

[0051] Since the first shaft section 111 and the plurality of pushers 141 are in contact with the shaft shoulder 122 , when the second shaft section 121 is assembled with the first shaft section 111 , the stability of the installation of the pushers 141 can be ensured, and the stability of the transmission between the first shaft section 111 and the second shaft section 121 can be ensured.

[0052] In some possible embodiments, see Figure 3 The pushing member 141 is cylindrical, and the width of the slot 1111 is less than or equal to the diameter of the pushing member 141 .

[0053] If the width of the slot 1111 is greater than the diameter of the pushing member 141, on the one hand, when the pushing member 141 is installed, the pushing member 141 is very easy to leave the slot 1111, thereby increasing the difficulty of installing the pushing member 141 in the slot 1111. On the other hand, when the power source stops working and the second shaft section 121 wants to rotate, the second shaft section 121 can drive the pushing member 141 to move, and the movable range of the pushing member 141 is the difference between the diameter of the pushing member 141 and the width of the slot 1111. In other words, the pushing member 141 has a larger movable gap relative to the slot 1111, which is not conducive to maintaining the stability of the display screen after being locked. Therefore, based on the above considerations, the width of the slot 1111 is made less than or equal to the diameter of the pushing member 141. In this way, the difficulty of installing the pushing member 141 can be reduced, and the stability of the display screen after being locked can be ensured.

[0054] In some possible embodiments, see Figure 3A plurality of transmission surfaces 1211 are sequentially connected along the circumferential direction of the driven shaft segment 120 , and a ridge 1212 is provided between each two adjacent transmission surfaces 1211 . The ridge 1212 protrudes away from the central axis of the driven shaft segment 120 , and the ridge 1212 is staggered from the slot 1111 .

[0055] Since there is a ridge 1212 between each two adjacent transmission surfaces 1211, the ridge 1212 protrudes along the central axis away from the driven shaft segment 120, and the ridge 1212 is staggered with the slot 1111. Therefore, when the power source drives the active shaft segment 110 to rotate, the first shaft segment 111 can push the pushing member 141 to abut against the ridge 1212, and then drive the driven shaft segment 120 to rotate. However, when the power source stops working and the driven shaft segment 120 wants to rotate, the ridge 1212 on the driven shaft segment 120 can squeeze the pushing member 141, so that the pushing member 141 abuts against the inner wall of the restraint sleeve 130, thereby avoiding the driven shaft segment 120 driving the active shaft segment 110 to rotate, and then achieving locking when power is transmitted from the driven shaft segment 120 to the active shaft segment 110. In other words, when the power source stops working, the one-way transmission shaft 100 can achieve self-locking.

[0056] In some possible embodiments, along the circumference of the driven shaft segment 120 , the middle portion of the transmission surface 1211 is recessed toward the central axis of the driven shaft segment 120 .

[0057] Since the middle portion of the transmission surface 1211 is recessed toward the central axis of the driven shaft segment 120, when the power source stops working and the driven shaft segment 120 wants to rotate, the ridge 1212 on the driven shaft segment 120 squeezes the pusher 141, so that the pusher 141 can abut and be locked against the inner wall of the restraint sleeve 130. Compared with a plane transmission surface 1211, the stability of the self-locking of the one-way transmission shaft 100 is ensured.

[0058] In some possible embodiments, see Figure 7 The transmission surface 1211 includes a first plane 1211a and a second plane 1211b connected to each other, and the connection between the first plane 1211a and the second plane 1211b is recessed toward the central axis of the driven shaft segment 120.

[0059] Since the first plane 1211 a and the second plane 1211 b have simple structures and are easy to process, the design and processing of the transmission surface 1211 can be simplified.

[0060] In addition, the included angle between the first plane 1211a and the second plane 1211b is in the range of 174° to 166°.

[0061] Of course, the transmission surface 1211 is not limited to the above structure, and the transmission surface 1211 can also be an arc surface.

[0062] In some possible embodiments, see Figure 6 The plurality of slots 1111 are evenly spaced along the circumference of the driving shaft segment 110 .

[0063] Since the plurality of slots 1111 are evenly spaced along the circumference of the driving shaft segment 110 , when the power source drives the driving shaft segment 110 to rotate, the uniformity of the driving force of the plurality of pushing members 141 on the driven shaft segment 120 is improved.

[0064] In some possible embodiments, see Figure 6 A limiting boss 131 is provided on the outer peripheral wall of the restraint sleeve 130 .

[0065] By providing a limiting boss 131 on the outer peripheral wall of the restraint sleeve 130 , the one-way transmission shaft 100 can be conveniently fixed to the vehicle body through the restraint sleeve 130 .

[0066] An embodiment of the present application also provides a vehicle-mounted flip screen device, which includes a power source, the one-way transmission shaft 100 in the above embodiment and a display screen, wherein the driving shaft section 110 of the one-way transmission shaft 100 is connected to the power source; the display screen is arranged on the driven shaft section 120 of the one-way transmission shaft 100.

[0067] Among them, the one-way transmission shaft 100 in the embodiment of the present application can have the same structure as any one-way transmission shaft 100 in the above embodiments, and can bring the same or similar beneficial effects. Please refer to the description in the above embodiments for details, and the embodiment of the present application will not be repeated here.

[0068] In addition, the vehicle-mounted flip screen device can be used in aerospace, smart cars, motor vehicles, high-speed railways and commercial vehicles.

[0069] In addition, the power source may be a rotary electric machine, a rotary motor, or the like.

[0070] Since the vehicle-mounted flip screen device in this embodiment includes the one-way transmission shaft 100 in the above embodiment, the locking stability of the vehicle-mounted flip screen device is improved.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A one-way transmission shaft, characterized in that: include: A driving shaft segment, the driving shaft segment includes a first shaft segment, a plurality of slots are arranged on the peripheral wall of the first shaft segment along the circumference of the driving shaft segment, and the driving shaft segment is also used to connect with a power source; A driven shaft segment, the driven shaft segment comprising a second shaft segment, and along the circumference of the driven shaft segment, a plurality of transmission surfaces are arranged on an outer peripheral wall of the second shaft segment, and the plurality of transmission surfaces correspond to the plurality of clamping grooves one by one; A constraint sleeve, the constraint sleeve is arranged on the first shaft section; A pushing assembly, wherein the pushing assembly includes a plurality of pushing members, and the plurality of pushing members correspond one-to-one to the plurality of slots. The pushing members are located in the corresponding slots and abut against the transmission surface, so as to drive the pushing members to push the driven shaft section to rotate when the active shaft section rotates, and the pushing members are locked with the inner wall of the constraint sleeve when the driven shaft section rotates.

2. The one-way transmission shaft according to claim 1, characterized in that: The interior of the first shaft segment is hollow, and the clamping groove passes through the peripheral wall of the first shaft segment; The second shaft section is inserted into the first shaft section, one side of the pushing member contacts the transmission surface, and the other side contacts the inner wall of the restraint sleeve.

3. The one-way transmission shaft according to claim 2, characterized in that: The driven shaft section also includes a shaft shoulder, the diameter of the shaft shoulder is larger than the diameter of the second shaft section, the second shaft section is connected to the shaft shoulder, and the first shaft section and the plurality of pushing members are all in contact with the shaft shoulder.

4. The one-way transmission shaft according to claim 2, characterized in that: The pushing member is cylindrical, and the width of the slot is less than or equal to the diameter of the pushing member.

5. The one-way transmission shaft according to claim 1, characterized in that: The plurality of transmission surfaces are sequentially connected along the circumferential direction of the driven shaft segment, and a convex ridge is provided between each two adjacent transmission surfaces. The convex ridge protrudes in a direction away from the central axis of the driven shaft segment, and the convex ridge is staggered with the slot.

6. The one-way transmission shaft according to claim 5, characterized in that: Along the circumference of the driven shaft segment, the middle portion of the transmission surface is recessed toward the central axis of the driven shaft segment.

7. The one-way transmission shaft according to claim 6, characterized in that: The transmission surface includes a first plane and a second plane connected to each other, and a connection between the first plane and the second plane is recessed toward the central axis of the driven shaft segment.

8. The one-way transmission shaft according to claim 1, characterized in that: The plurality of slots are distributed at equal intervals along the circumference of the driving shaft segment.

9. The one-way transmission shaft according to claim 1, characterized in that: A limiting boss is arranged on the outer peripheral wall of the constraint sleeve.

10. A vehicle-mounted flip screen device, characterized in that: include: Power source; The one-way transmission shaft according to any one of claims 1 to 9, wherein the driving shaft section of the one-way transmission shaft is connected to the power source; A display screen is arranged on the driven shaft section of the one-way transmission shaft.

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