CN216589647U - Keyway cohesion type coupler and trolley - Google Patents
Keyway cohesion type coupler and trolley Download PDFInfo
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- CN216589647U CN216589647U CN202123005786.0U CN202123005786U CN216589647U CN 216589647 U CN216589647 U CN 216589647U CN 202123005786 U CN202123005786 U CN 202123005786U CN 216589647 U CN216589647 U CN 216589647U
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Abstract
The utility model discloses a keyway enclasping type coupler and a trolley comprising the coupler. The coupling includes a bushing. The first end and the second end of axle sleeve are relative both ends, and wherein the shaft hole has been seted up to first end, and second end fixedly connected with round pin. The shaft sleeve is provided with a shaft seam communicated with the shaft hole, and the key groove holding type coupler further comprises a locking piece used for locking the shaft seam. The wheel pin is provided with a clamp spring groove arranged along the circumferential direction of the wheel pin, and a key groove is formed between the clamp spring groove and the shaft sleeve. The keyway enclasping type coupler further comprises a clamp spring used for axial movement of the limit wheel pin and a limit key used for circumferential rotation of the limit wheel pin, the clamp spring is embedded in the clamp spring groove, and the limit key is embedded in the keyway. The output shaft of the motor is inserted into the shaft hole of the coupler and then locked with the shaft seam through the locking piece, so that the shaft sleeve firmly holds the output shaft. Compared with the traditional jackscrew tightening mode, the tightening mode is firmer.
Description
Technical Field
The utility model relates to the field of robots, in particular to a keyway enclasping type coupler and a trolley.
Background
With the development of science and technology, mobile robot technology is rapidly developed, and AGV trolleys and the like are increasingly widely applied. The cart requires a motor to drive the wheels to achieve the moving function. In the existing trolley, a motor and a wheel are connected through a specific connecting piece, wherein an output shaft of the motor is fixed through a jackscrew and a shaft sleeve. As shown in fig. 1, the output shaft of the motor is inserted into the shaft sleeve, and the jackscrew is inserted into the side surface of the shaft sleeve to directly jack the output shaft of the motor. Under the connection mode, the output shaft of the motor is easy to be separated from the shaft sleeve, and the stable operation of the trolley is hindered. Therefore, a new connecting member is needed to enhance the connection stability between the motor and the wheel.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a keyway hugging type coupler and a trolley, so that the connection between a motor and wheels is more stable.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a key groove holding type coupler comprises a shaft sleeve; the first end and the second end of the shaft sleeve are opposite, wherein the first end is provided with a shaft hole, and the second end is fixedly connected with a wheel pin;
the shaft sleeve is provided with a shaft seam communicated with the shaft hole, and the key groove enclasping type coupler further comprises a locking piece used for locking the shaft seam;
a clamp spring groove arranged along the circumferential direction of the wheel pin is formed in the wheel pin, and a key groove is formed between the clamp spring groove and the shaft sleeve; the keyway cohesion type coupler further comprises a clamp spring used for limiting the axial movement of the wheel pin and a limiting key used for limiting the circumferential rotation of the wheel pin, the clamp spring is embedded in the clamp spring groove, and the limiting key is embedded in the keyway.
Optionally, the outer surface of the shaft sleeve includes a first end surface, a second end surface and a circumferential arc surface, the first end surface and the second end surface are oppositely arranged, and the circumferential arc surface is perpendicular to the first end surface and the second end surface;
the shaft seam comprises a straight seam arranged along the radial direction of the shaft sleeve, and the locking piece locks the straight seam;
the straight seam comprises a straight seam bottom, a first straight seam opening, a second straight seam opening and a third straight seam opening; the first straight seam opening is communicated with the first end face, the second straight seam opening is communicated with the shaft hole, the third straight seam opening is communicated with the circumferential arc face, and a distance is reserved between the straight seam bottom and the wheel pin.
Optionally, the axial seam further comprises an oblique seam, and the oblique seam comprises an oblique seam bottom, a first oblique seam opening and a second oblique seam opening; the inclined seam bottom extends to the shaft hole from the intersection of the circumferential arc surface and the first end surface in an inclined manner, the first inclined seam opening is communicated with the first end surface, and the second inclined seam opening is communicated with the shaft hole;
the first straight seam and the first inclined seam are symmetrical about the central axis of the shaft hole; the central shaft of the shaft hole and the central shaft of the shaft sleeve are positioned on the same straight line.
Optionally, the shaft gap further comprises an arc gap arranged along the circumferential direction of the shaft sleeve;
the arc seam comprises an arc seam bottom, a first arc seam opening, a second arc seam opening and a third arc seam opening; the first arc seam is communicated with the circumferential arc surface, and the second arc seam is communicated with the shaft hole; the third arc seam opening is communicated with the bottom of the straight seam, and a distance is reserved between the arc seam bottom and the inclined seam.
Optionally, the minimum distance between the oblique seam and the wheel pin is greater than the minimum distance between the straight seam and the wheel pin, and the distance between the arc seam and the wheel pin is equal to the minimum distance between the straight seam and the wheel pin.
Optionally, a locking hole penetrating through the straight seam is formed in the shaft sleeve, and the locking hole is divided into a first locking section and a second locking section by the straight seam;
a first locking port and a second locking port are formed in the circumferential arc surface; the first locking section is a through hole and communicated with the first locking port; the second locking section is a threaded hole and is communicated with the second locking port;
the locking piece is a locking screw rod; the locking screw rod sequentially penetrates through the first locking port and the first locking section and is in threaded connection with the second locking section.
Optionally, the area of the first locking port is larger than that of the second locking port; the area of the rod head of the locking screw is smaller than that of the first locking port, and the area of the rod tail of the locking screw is smaller than that of the second locking port.
Optionally, the wheel pin and the shaft sleeve are both cylinders, and a central axis of the wheel pin and a central axis of the shaft sleeve are on the same straight line;
the wheel pin is fixed on the second end face of the shaft sleeve, the outer diameter of the wheel pin is smaller than that of the shaft sleeve, and the outer diameter of the wheel pin is larger than the hole diameter of the shaft hole;
the key groove and the clamp spring groove are both arranged on the side surface of the wheel pin, and the side surface of the wheel pin is parallel to the circumferential arc surface of the shaft sleeve; the wheel pin is provided with a plurality of clamp spring grooves, the key groove is positioned between the shaft sleeve and the clamp spring groove closest to the shaft sleeve, and the key groove is arranged in a penetrating manner along the radial direction of the wheel pin; the shape of the key groove consists of a rectangle and two semicircles respectively arranged on two width sides of the rectangle, and the diameter of each semicircle is equal to the width of the rectangle.
A trolley comprising a keyway hugging coupling as hereinbefore described;
the trolley also comprises a motor, and an output shaft of the motor penetrates through the shaft hole;
the trolley also comprises a wheel, the wheel comprises a hub, a through hub middle hole is formed in the hub, and the wheel pin penetrates through the hub middle hole; the hub is positioned between the clamp spring and the shaft sleeve, and the clamp spring limits the relative movement between the hub and the wheel pin;
a limiting groove is formed in the hole wall of the central hole of the hub; one part of the limiting key is embedded in the key groove, the other part of the limiting key is embedded in the limiting groove, and the limiting key limits the relative rotation between the wheel hub and the wheel pin.
Optionally, the outer diameter of the snap spring and the outer diameter of the shaft sleeve are both larger than the aperture of the hole in the hub, and the distance between the snap spring and the shaft sleeve is equal to the axial thickness of the hub; the thickness of the limiting key is equal to the sum of the depth of the key groove and the depth of the limiting groove; the wheels are rubber wheels.
Compared with the prior art, the utility model has the following beneficial effects:
the output shaft of the tight motor of jackscrew top is fixed to the existing keyway enclasping type shaft coupling, and the problem that the output shaft is easy to deviate from due to the fact that the jackscrew is easy to loosen exists in the fixing mode, and the long-term stable operation of the trolley cannot be guaranteed. The shaft sleeve is provided with a shaft seam communicated with the shaft hole, and the shaft seam is locked through the locking piece after the output shaft of the motor is inserted into the shaft hole, so that the shaft sleeve firmly holds the output shaft. Compared with the traditional jackscrew tightening mode, the tightening mode is firmer. In addition, the keyway enclasping type coupler can also be fixedly connected with the wheel through the wheel pin, namely, the wheel is sleeved on the wheel pin, the wheel pin and the wheel are limited through the clamp spring to move relatively, and the wheel pin and the wheel are limited to rotate relatively through the limiting key. In conclusion, the key groove holding type coupler can firmly fix the motor and the wheel and has the advantages of simple structure, convenience in installation, low cost and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a conventional jackscrew jacking motor output shaft;
fig. 2 is a schematic structural diagram of a keyway hugging type coupling according to an embodiment of the present invention;
fig. 3 is another schematic structural diagram of a keyway hugging coupler according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a bushing provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a bushing provided in accordance with an embodiment of the present invention;
fig. 6 is an assembly schematic diagram of a motor, a keyway hugging type coupling, and a hub according to an embodiment of the present invention.
Illustration of the drawings: 1. a shaft sleeve; 11. a first end face; 12. a circumferential arc surface; 2. a wheel pin; 21. a clamp spring groove; 22. a keyway; 23. a limiting key; 3. a shaft hole; 4. shaft seam; 41. straight sewing; 411. a straight seam bottom; 42. Oblique sewing; 421. a bottom is obliquely sewn; 43. arc sewing; 431. arc seam bottom; 50. a locking hole; 51. a first locking port; 52. a second locking port; 53. locking the screw rod; 6. a motor; 61. an output shaft; 7. a hub; 71. A hub central bore; 72. a limiting groove.
Detailed Description
In order to make the objects, features and advantages of the present invention more apparent and understandable, the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings, and it is to be understood that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 2, the embodiment of the present invention provides a keyway lock type coupling, which can firmly connect the output shaft 61 of the motor 6 and the wheel.
The key groove holding type coupler comprises a shaft sleeve 1. The first end and the second end of axle sleeve 1 are relative both ends, and wherein shaft hole 3 has been seted up to first end, and second end fixedly connected with round pin 2. The shaft sleeve 1 and the wheel pin 2 are of an integrated structure.
Offer the axle gap 4 in intercommunication shaft hole 3 on the axle sleeve 1, keyway cohesion formula shaft coupling is still including the retaining member that is used for locking axle gap 4.
The wheel pin 2 is provided with a clamp spring groove 21 arranged along the circumferential direction, and a key groove 22 is arranged between the clamp spring groove 21 and the shaft sleeve 1. The keyway cohesion type coupler further comprises a clamp spring for limiting axial movement of the wheel pin 2 and a limiting key 23 for limiting circumferential rotation of the wheel pin 2, wherein the clamp spring is embedded in the clamp spring groove 21, and the limiting key 23 is embedded in the keyway 22.
The existing key groove holding type coupler adopts a mode that a jackscrew tightly jacks an output shaft to fix the output shaft, and the problem that the output shaft is easy to deviate due to the fact that the jackscrew is easy to loosen exists in the fixing mode, so that the trolley can not be guaranteed to stably run for a long time. The keyway enclasping type shaft coupling that this embodiment provided passes through retaining member locking shaft seam 4 after the output shaft inserts shaft hole 3, can make axle sleeve 1 firmly enclasping the output shaft. Compared with the traditional jackscrew tightening mode, the tightening mode is firmer. In addition, the keyway cohesion type shaft coupling still can be through round pin 2 and wheel fixed connection, be about to the wheel cover locate round pin 2 on to through the relative movement between jump ring spacing round pin 2 and the wheel, through the relative rotation between spacing key 23 spacing round pin 2 and the wheel. In conclusion, the key groove clasping type coupler can firmly fix the motor 6 and the wheel and has the advantages of simple structure, convenience in installation, low cost and the like.
Referring to fig. 3-5, the outer surface of the shaft sleeve 1 includes a first end surface 11, a second end surface and a circumferential arc surface 12, the first end surface 11 and the second end surface are disposed opposite to each other, and the circumferential arc surface 12 is perpendicular to the first end surface 11 and the second end surface.
The shaft slot 4 comprises a straight slot 41 arranged along the radial direction of the shaft sleeve 1, and the locking piece locks the straight slot 41. The straight slit 41 includes a straight slit bottom 411, a first straight slit, a second straight slit, and a third straight slit. The first straight seam mouth communicates first terminal surface 11, and the second straight seam mouth communicates shaft hole 3, and the third straight seam mouth communicates circumference cambered surface 12, leaves the distance between the straight seam end 411 and round pin 2.
The shaft seam 4 further comprises an oblique seam 42, and the oblique seam 42 comprises an oblique seam bottom 421, a first oblique seam opening and a second oblique seam opening. The inclined seam bottom 421 extends to the axle hole 3 from the junction of the circumferential arc surface 12 and the first end surface 11 in an inclined manner, the first inclined seam opening is communicated with the first end surface 11, and the second inclined seam opening is communicated with the axle hole 3.
The first straight slit and the first inclined slit are symmetrical about the central axis of the shaft hole 3. The central axis of the shaft hole 3 and the central axis of the shaft sleeve 1 are on the same straight line.
The shaft slot 4 further comprises an arc slot 43 arranged in the circumferential direction of the sleeve 1. The arc seam 43 includes an arc seam bottom 431, a first arc seam, a second arc seam, and a third arc seam. The first arc seam is communicated with the circumferential arc surface 12, and the second arc seam is communicated with the shaft hole 3. The third arc seam opening is communicated with the bottom of the straight seam 41, and a distance is reserved between the arc seam bottom 431 and the inclined seam 42.
The minimum distance between the oblique slot 42 and the wheel pin 2 is greater than the minimum distance between the straight slot 41 and the wheel pin 2 to avoid communication between the oblique slot 42 and the arc slot 43. The distance between the arc-shaped slot 43 and the wheel pin 2 is equal to the minimum distance between the straight slot 41 and the wheel pin 2, so that the arc-shaped slot 43 and the straight slot 41 are communicated.
Through the cooperation of straight seam 41, oblique seam 42 and arc seam 43, make axle sleeve 1 have good elasticity, only need retaining member locking straight seam 41 can hold tightly the output shaft of motor 6, save material and it is convenient to install. The good elasticity that axle sleeve 1 possessed still is convenient for the smooth insertion of the output shaft of motor 6 in shaft hole 3.
In the embodiment, the wheel pin 2 and the shaft sleeve 1 are both cylindrical, and the central axis of the wheel pin 2 and the central axis of the shaft sleeve 1 are on the same straight line. The wheel pin 2 is fixed on the second end surface of the shaft sleeve 1, the outer diameter of the wheel pin 2 is smaller than that of the shaft sleeve 1, and the outer diameter of the wheel pin 2 is larger than the hole diameter of the shaft hole 3.
The key groove 22 and the jump ring groove 21 are both arranged on the side surface of the wheel pin 2, and the side surface of the wheel pin 2 is parallel to the circumferential arc surface 12 of the shaft sleeve 1. The key groove 22 is arranged to penetrate in the radial direction of the wheel pin 2, and the shape of the key groove 22 is composed of a rectangle and two semicircles respectively arranged on two width sides of the rectangle, wherein the diameter of the semicircle is equal to the width of the rectangle.
The wheel pin 2 is provided with a plurality of clamp spring grooves 21, and the key groove 22 is positioned between the shaft sleeve 1 and the clamp spring groove 21 closest to the shaft sleeve 1. Since the wheel may have different thicknesses, providing a plurality of snap spring grooves 21 allows a customer to selectively use the appropriate snap spring groove 21 depending on the thickness of the wheel.
Referring to fig. 3, 5 and 6, the shaft sleeve 1 is provided with a locking hole 50 penetrating through the straight slit 41, and the locking hole 50 is divided into a first locking section and a second locking section by the straight slit 41.
The circumferential arc surface 12 is provided with a first locking port 51 and a second locking port 52. The first locking section is a through hole communicating with the first locking port 51. The second locking section is a threaded hole and is communicated with the second locking port 52.
The locking member comprises a locking screw 53. The locking screw 53 sequentially penetrates through the first locking port 51 and the first locking section and is in threaded connection with the second locking section.
The area of the first locking port 51 is larger than the area of the second locking port 52. The head area of the locking screw 53 is smaller than the area of the first locking port 51, and the tail area of the locking screw 53 is smaller than the area of the second locking port 52. The locking screw 53 can thus be completely inserted into the bushing 1.
This embodiment also provides a dolly, and this dolly includes aforementioned keyway hugging type shaft coupling.
Referring to fig. 6, the cart further includes a motor 6, and an output shaft 61 of the motor 6 is inserted into the shaft hole 3 and locked by the locking screw 53.
The cart also includes wheels, preferably rubber wheels. The wheel comprises a hub 7, a through hub middle hole 71 is formed in the hub 7, and the wheel pin 2 penetrates through the hub middle hole 71. The hub 7 is positioned between the clamp spring and the shaft sleeve 1, and the clamp spring limits the relative movement between the hub 7 and the wheel pin 2.
Specifically, the outer diameter of the clamp spring and the outer diameter of the shaft sleeve 1 are both larger than the aperture of the central hole 71 in the hub, and the distance between the clamp spring and the shaft sleeve 1 is equal to the axial thickness of the hub 7. Therefore, the hub 7 is caught between the circlip and the sleeve 1 and cannot move axially.
The hole wall of the hub middle hole 71 is provided with a limiting groove 72, one part of the limiting key 73 is embedded in the key groove 22, the other part of the limiting key 73 is embedded in the limiting groove 72, and the limiting key 72 limits the relative rotation between the hub 7 and the wheel pin 2. The thickness of the retaining key 73 is equal to the sum of the depth of the key groove 22 and the depth of the retaining groove 72.
To sum up, this embodiment provides a keyway cohesion type shaft coupling and contains the dolly of this shaft coupling, and this shaft coupling sets up the axle seam 4 in intercommunication shaft hole 3 on axle sleeve 1, inserts through retaining member locking axle seam 4 behind shaft hole 3 at the output shaft of motor 6, makes axle sleeve 1 can firmly hold the output shaft of motor 6 tightly. Compared with the traditional jackscrew tightening mode, the tightening mode is firmer. In addition, the coupler is fixedly connected with the wheel through the wheel pin 2, and a plurality of clamp spring grooves 21 are formed in the wheel pin 2 to adapt to wheels with different thicknesses. The shaft coupling can firmly fix the motor 6 and the wheels and has the advantages of simple structure, convenience in installation, low cost and the like.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A key groove holding type coupler is characterized by comprising a shaft sleeve; the first end and the second end of the shaft sleeve are opposite, wherein the first end is provided with a shaft hole, and the second end is fixedly connected with a wheel pin;
the shaft sleeve is provided with a shaft seam communicated with the shaft hole, and the key groove enclasping type coupler further comprises a locking piece used for locking the shaft seam;
the wheel pin is provided with a clamp spring groove arranged along the circumferential direction of the wheel pin, and a key groove is formed between the clamp spring groove and the shaft sleeve; the keyway cohesion type coupler further comprises a clamp spring used for limiting the axial movement of the wheel pin and a limiting key used for limiting the circumferential rotation of the wheel pin, the clamp spring is embedded in the clamp spring groove, and the limiting key is embedded in the keyway.
2. The keyway hugging type coupling of claim 1, wherein the outer surface of the sleeve comprises a first end surface, a second end surface, and a circumferential arc surface, the first end surface and the second end surface being disposed opposite to each other, the circumferential arc surface being perpendicular to the first end surface and the second end surface;
the shaft seam comprises a straight seam arranged along the radial direction of the shaft sleeve, and the locking piece locks the straight seam;
the straight seam comprises a straight seam bottom, a first straight seam opening, a second straight seam opening and a third straight seam opening; the first straight seam opening is communicated with the first end face, the second straight seam opening is communicated with the shaft hole, the third straight seam opening is communicated with the circumferential arc face, and a distance is reserved between the straight seam bottom and the wheel pin.
3. The keyway hug coupler of claim 2, wherein the shaft slot further comprises a miter slot, the miter slot comprising a miter bottom, a first miter slot opening, and a second miter slot opening; the inclined seam bottom extends to the shaft hole from the intersection of the circumferential arc surface and the first end surface in an inclined manner, the first inclined seam opening is communicated with the first end surface, and the second inclined seam opening is communicated with the shaft hole;
the first straight seam and the first inclined seam are symmetrical about the central axis of the shaft hole; the central shaft of the shaft hole and the central shaft of the shaft sleeve are positioned on the same straight line.
4. The keyway hug coupler of claim 3, wherein said axial slots further comprise arcuate slots disposed circumferentially about said sleeve;
the arc seam comprises an arc seam bottom, a first arc seam opening, a second arc seam opening and a third arc seam opening; the first arc seam is communicated with the circumferential arc surface, and the second arc seam is communicated with the shaft hole; the third arc seam opening is communicated with the bottom of the straight seam, and a distance is reserved between the arc seam bottom and the inclined seam.
5. The keyway hug coupler of claim 4, wherein a minimum distance between the oblique slot and the wheel pin is greater than a minimum distance between the straight slot and the wheel pin, and wherein a distance between the arc slot and the wheel pin is equal to the minimum distance between the straight slot and the wheel pin.
6. The keyway hugging type coupling of claim 2, wherein a locking hole penetrating through the straight slit is formed on the shaft sleeve, and the locking hole is divided into a first locking section and a second locking section by the straight slit;
a first locking port and a second locking port are formed in the circumferential arc surface; the first locking section is a through hole and communicated with the first locking port; the second locking section is a threaded hole and is communicated with the second locking port;
the locking piece is a locking screw rod; the locking screw rod sequentially penetrates through the first locking port and the first locking section and is in threaded connection with the second locking section.
7. The keyway hug coupler of claim 6, wherein the area of the first locking port is greater than the area of the second locking port; the area of the rod head of the locking screw is smaller than that of the first locking port, and the area of the rod tail of the locking screw is smaller than that of the second locking port.
8. The keyway hug coupler of claim 2, wherein said wheel pin and said bushing are cylindrical, and wherein a central axis of said wheel pin and a central axis of said bushing are collinear;
the wheel pin is fixed on the second end face of the shaft sleeve, the outer diameter of the wheel pin is smaller than that of the shaft sleeve, and the outer diameter of the wheel pin is larger than the hole diameter of the shaft hole;
the key groove and the clamp spring groove are both arranged on the side surface of the wheel pin, and the side surface of the wheel pin is parallel to the circumferential arc surface of the shaft sleeve; the wheel pin is provided with a plurality of clamp spring grooves, the key groove is positioned between the shaft sleeve and one clamp spring groove closest to the shaft sleeve, and the key groove is arranged in a penetrating manner along the radial direction of the wheel pin; the shape of the key groove consists of a rectangle and two semicircles respectively arranged on two width sides of the rectangle, and the diameter of each semicircle is equal to the width of the rectangle.
9. A trolley comprising a keyway hug coupler according to any one of claims 1 to 8;
the trolley also comprises a motor, and an output shaft of the motor penetrates through the shaft hole;
the trolley also comprises wheels, each wheel comprises a hub, a through hub middle hole is formed in each hub, and the wheel pin penetrates through the hub middle hole; the hub is positioned between the clamp spring and the shaft sleeve, and the clamp spring limits the relative movement between the hub and the wheel pin;
a limiting groove is formed in the hole wall of the central hole of the hub; one part of the limiting key is embedded in the key groove, the other part of the limiting key is embedded in the limiting groove, and the limiting key limits the relative rotation between the wheel hub and the wheel pin.
10. The trolley according to claim 9, wherein the outside diameter of the snap spring and the outside diameter of the bushing are both larger than the diameter of the hole in the hub, and the distance between the snap spring and the bushing is equal to the axial thickness of the hub; the thickness of the limiting key is equal to the sum of the depth of the key groove and the depth of the limiting groove; the wheels are rubber wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123005786.0U CN216589647U (en) | 2021-12-02 | 2021-12-02 | Keyway cohesion type coupler and trolley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123005786.0U CN216589647U (en) | 2021-12-02 | 2021-12-02 | Keyway cohesion type coupler and trolley |
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| Publication Number | Publication Date |
|---|---|
| CN216589647U true CN216589647U (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123005786.0U Active CN216589647U (en) | 2021-12-02 | 2021-12-02 | Keyway cohesion type coupler and trolley |
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| CN (1) | CN216589647U (en) |
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2021
- 2021-12-02 CN CN202123005786.0U patent/CN216589647U/en active Active
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