CN209740623U - Bearing wheel assembly of pallet truck - Google Patents

Bearing wheel assembly of pallet truck Download PDF

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Publication number
CN209740623U
CN209740623U CN201920465973.0U CN201920465973U CN209740623U CN 209740623 U CN209740623 U CN 209740623U CN 201920465973 U CN201920465973 U CN 201920465973U CN 209740623 U CN209740623 U CN 209740623U
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China
Prior art keywords
wheel
fork
carrier
rotating shaft
assembly
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CN201920465973.0U
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Chinese (zh)
Inventor
匡灏
夏中楠
潘鹏飞
罗星
尚乐
孙健琛
阮镜宣
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Hangcha Group Co Ltd
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Hangcha Group Co Ltd
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Priority to CN201920465973.0U priority Critical patent/CN209740623U/en
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Publication of CN209740623U publication Critical patent/CN209740623U/en
Priority to US16/736,834 priority patent/US11345382B2/en
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Abstract

the utility model discloses a tray truck's carrier wheel assembly has front wheel fork, carrier wheel, side and moves the wheel carrier, side and move wheel, elastomeric element etc. and drive the rotation through receiving of front wheel fork, make the side move the wheel and be less than the carrier wheel by being higher than changing into of carrier wheel to realized bearing state to the conversion of side moving state. Through the simple structure, the distance of the mounted fork body can be conveniently adjusted, and the adaptability of the device is obviously improved; in the adjusting process, the abrasion of the roller can be avoided, the whole service life of the equipment is prolonged, and the maintenance cost is reduced.

Description

bearing wheel assembly of pallet truck
Technical Field
The utility model relates to a haulage equipment technical field especially relates to a tray truck's bearing wheel assembly.
background
pallet jack has found wide application in the warehousing field.
The tray is widely applied in various aspects of production and life, the specification and the model are various, even if the standard tray has various opening sizes, different opening heights and the like, and the situation is more complicated for various non-standard trays.
common pallet trucks, whose fork spacing is not adjustable; as described above, the specification and model of the pallet to be transported are complicated, which leads to diversification of pallet carriers, and many production and living occasions need to be equipped with various pallet carriers to meet actual needs, which not only increases the cost, but also is not favorable for unified management.
In addition, the service life of the equipment, the convenience and reliability of operation, and the like are also issues to be considered in designing the pallet truck.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a tray truck's carrier wheel assembly, the adjustment of tray truck fork interval of can being convenient for, and equipment life is longer.
In order to achieve the above object, the utility model provides a tray truck's bearing wheel assembly, include:
the front wheel fork can be arranged at the bottom of the rear end of the fork body and rotates around a wheel fork rotating shaft relative to the fork body; the bearing wheel is rotatably arranged at the rear end of the front wheel fork, and the rotating shaft of the bearing wheel is parallel to the wheel fork rotating shaft;
The side shifting wheel frame is rotatably connected with the front wheel fork by winding a wheel frame rotating shaft, and the wheel frame rotating shaft is positioned on the rear side of the wheel fork rotating shaft and is parallel to the wheel fork rotating shaft; the side shifting wheel is rotatably arranged at the rear end of the side shifting wheel frame, and the rotating shaft of the side shifting wheel is vertical to the rotating shaft of the wheel frame;
An elastic member provided between the front fork and the side shift carrier and having a tendency to turn the side shift carrier around the carrier rotation shaft toward the front fork;
The front wheel fork is provided with a limiting component, and when the included angle between the side shifting wheel frame and the front wheel fork is reduced to a preset angle, the limiting component prevents the angle between the side shifting wheel frame and the front wheel fork from being further reduced; the front end of the front wheel fork can be rotatably connected with a push rod assembly, so that the front wheel fork can rotate around the wheel fork rotating shaft under the action of the push rod assembly; the bottom of the side shift wheel is lower than the bottom of the load wheel when the push rod assembly reaches the final end of its travel.
Preferably, the axis of rotation of the carrier wheel relative to the front fork coincides with the wheel carrier axis of rotation.
preferably, the limiting component is a limiting convex block integrally formed on the upper edge of the front wheel fork, and a limiting surface abutting against the limiting convex block at the predetermined angle is arranged on the upper edge of the side shifting wheel frame.
Preferably, the side shifting wheel frame is further provided with a guide roller, the guide roller is positioned at the rear end of the side shifting wheel, and the rotating shaft of the guide roller is parallel to the rotating shaft of the wheel frame.
Preferably, two transverse plates are arranged between two side plates of the side shifting wheel frame, and the side shifting wheel is installed between the two transverse plates.
Preferably, the elastic member is a tension spring.
preferably, the connecting structure is embodied as a shaft hole.
The utility model provides a tray carrier's carrier wheel assembly can rotate through the driven of front wheel fork, makes the side shift wheel be less than the carrier wheel by being higher than changing into of carrier wheel to realized bearing the weight of the state to the conversion of side shift state. Through the simple structure, the distance of the mounted fork body can be conveniently adjusted, and the adaptability of the device is obviously improved; in the adjusting process, the abrasion of the roller can be avoided, the whole service life of the equipment is prolonged, and the maintenance cost is reduced.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of an overall structure of a pallet truck to which the load wheel assembly of the present invention is applied;
FIG. 2 is an exploded view of the pallet jack of FIG. 1;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
Fig. 4 is a schematic perspective view of the bearing wheel assembly of the present invention;
FIG. 5 is a schematic view of the load wheel assembly of FIG. 4 in an initial state;
FIG. 6 is a schematic view of the load wheel assembly shown in FIG. 4;
fig. 7 is a schematic diagram of the side-shifting state of the carrier wheel assembly in fig. 4.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses the core provides a tray truck's carrier wheel assembly, the adjustment of tray truck fork interval of can being convenient for, and equipment life is longer.
A detailed description of a pallet jack to which the load wheel assembly is applied will first be presented to facilitate a more complete understanding of the function of the load wheel assembly.
Referring to fig. 1-3, fig. 1 is a schematic view of an overall structure of a pallet truck with a carrying wheel assembly according to the present invention; FIG. 2 is an exploded view of the pallet jack of FIG. 1; fig. 3 is a partially enlarged view of a portion a in fig. 2.
The utility model provides a tray truck overall structure that bearing wheel assembly applied has control a steering system 17, drive wheel 14, wheel casing 16 etc., and drive wheel 14 can provide the support for the equipment front end; the number of the drive wheels 14 may be one as shown in fig. 2, or may be plural.
the driving wheel 14 supports the front frame 13, and the two can rotate relatively; when one drive wheel 14 is provided, it may be provided in the middle of the front frame 13. In addition, an auxiliary support wheel, which may be a universal wheel, may be disposed below each of the two sides of the front frame 13.
the upper part of the driving wheel 14 is also provided with a lifting component 18, and the lifting component 18 can be a vertically arranged oil cylinder, and can also be other power components such as a screw rod and the like. The lifting end of the lifting component 18 is connected with the rear frame 2 through a pin shaft arranged transversely so as to drive the rear frame 2 to lift or descend vertically, and the rear frame 2 can rotate around the pin shaft arranged transversely relative to the lifting component 18 at a proper angle in the lifting or descending process.
The rear frame 2 can be provided with a hood 1 and can also bear the matched components such as an electric control assembly 5, a storage battery 6, a hydraulic unit 15 and the like.
The rear frame 2 is mounted with transversely arranged guide rods 3, the number of which guide rods 3 can be one or more.
two guide bars 3 that set up about the frame 2 is installed to back in the picture, and the front end of fork body is fixed and is equipped with the installation riser, and the position that the installation riser corresponds is equipped with two sliding sleeves with two guide bars 3 sliding fit respectively. Such a connection is more stable and reliable.
The pallet truck has two fork bodies, namely a left fork 7 and a right fork 8, and although the current pallet truck has two fork bodies, the future occurrence of three forks and other structures is not excluded, and the two fork bodies are provided, and whether other structures exist or not is within the scope of the present application.
The front ends of the left fork 7 and the right fork 8 are connected with the rear frame 2 in a sliding mode through the guide rods 3, and a plurality of sliding sleeves which can be matched with the guide rods 3 can be fixedly installed at the front ends of the left fork 7 and the right fork.
The term "front end" as used herein refers to the end of FIG. 3 where steering system 17 is operated, and "rear end" refers to the end of FIG. 3 where load wheel assembly 9 is located.
Side shift driving components 4 are arranged between the rear frame 2 and the left fork 7 and between the rear frame and the right fork 8; the side shift driving component 4 can be a driving component such as an oil cylinder, a motor, a screw rod and the like. In the figure, the side shift driving component 4 is a side shift oil cylinder, and two ends of the side shift oil cylinder are respectively arranged on the rear frame 2 and the mounting vertical plate.
The rear frame 2 is also provided with a rear connecting rod assembly 12, and the rear connecting rod assembly 12 is arranged in parallel with the guide rod 3; the rear connecting rod assembly 12 can be rotatably connected with the front frame 13 through a first swing arm 19, wherein the first swing arm 19 is perpendicular to the rear connecting rod assembly 12, and the rear connecting rod assembly 12 can do circular arc motion with the first swing arm 19 as the radius along with the lifting of the rear frame 2.
The rear ends of the left fork 7 and the right fork 8 are respectively provided with a bearing wheel assembly 9, the bearing wheel assemblies 9 are connected with a push rod assembly 10, the push rod assembly 10 is perpendicular to the rear connecting rod assembly 12, and the front ends of the push rod assembly 10 are connected with a push rod shaft 20 in a sliding manner; the push rod shaft 20 and the rear connecting rod assembly 12 are arranged in parallel, the push rod shaft and the rear connecting rod assembly 12 are rotatably connected through a second swing arm 21, and the second swing arm 21 and the rear connecting rod assembly 12 are also vertically arranged.
Limiting blocks 11 are arranged between the left fork 7 and the right fork 8 and the push rod assembly 10, and the materials of the limiting blocks can be nylon, rubber, polyurethane and the like. Stopper 11 can install the inboard at left fork 7 and right fork 8 to from both sides proper clamp push rod assembly, thereby eliminate lateral clearance between them, like this, left fork 7 and right fork 8 can drive push rod assembly 10 through stopper 11 and carry out lateral shifting.
According to the common knowledge related to gear trains and in combination with specific occasions, a person skilled in the art can make specific reasonable selections on the lengths of the first swing arm 19, the second swing arm 21, the push rod assembly 10, the lifting height of the lifting component 18 and other values, so that when the lifting component 18 lifts (at this time, the rear frame 2 drives the rear connecting rod assembly 12 to move to a preset high position), the rear frame 2 can be driven to lift and slightly rotate relative to the lifting component 18 around a pin shaft arranged transversely, the rear connecting rod assembly 12 also properly lifts, in the process, the first swing arm 19 generates proper angle changes relative to the front frame 13 and the second swing arm 21 relative to the push rod assembly 10, and the combined action finally enables the push rod assembly 10 to be pushed out to the rear end. Similarly, when the lifting member 18 is lowered (when the rear frame 2 moves the rear link assembly 12 to the predetermined lower position), the combined action eventually retracts the push rod assembly 10 toward the front end.
The carrier wheel assembly 9 has a lateral rolling state (i.e., a state in which the left fork 7 and the right fork 8 move perpendicular to the direction of the front end and the rear end) and a longitudinal rolling state (i.e., a state in which the left fork 7 and the right fork 8 move in the direction of the front end and the rear end). The push rod assembly 10 is pushed out or retracted along the direction of the front end and the rear end, and can drive the bearing wheel assembly 9 to switch between a transverse rolling state and a longitudinal rolling state.
According to the pallet truck, the distance between the pallet fork bodies can be adjusted under the action of the lateral movement driving part, so that different pallet fork distances can be provided, and the adaptability is obviously improved; in the adjusting process, the push rod assembly can adjust the bearing wheel assembly from a longitudinal rolling state to a transverse rolling state, so that the abrasion of the roller is avoided, the whole service life of the equipment is prolonged, and the maintenance cost is reduced; in addition, the push rod assembly is driven to be pushed out along with the rising of the rear frame through the first swing arm, the rear connecting rod assembly, the second swing arm, the push rod shaft and the like, and the operation process is simple and reliable.
The above-mentioned bearing wheel assembly 9 can adopt various specific forms to realize the switching between the transverse rolling state and the longitudinal rolling state.
For example, the roller can be mounted at the rear end of the fork body through a vertical mounting shaft, and the roller rotates by about 90 degrees around the vertical mounting shaft, so that the switching between the transverse rolling state and the longitudinal rolling state can be realized. More specifically, a gear ring may be fixed on the periphery of the vertical roller, and a rack capable of being engaged with the gear ring is disposed at the rear end of the push rod assembly 10, and along with the pushing and retracting of the push rod assembly 10, the rack may drive the gear ring to correspondingly rotate in a reciprocating manner, so as to drive the vertical mounting shaft to rotate, thereby changing the rolling direction of the roller.
The bearing wheel assembly 9 may also adopt other specific forms to realize the switching between the transverse rolling state and the longitudinal rolling state, for example, a motor is triggered to execute a setting action according to the stroke position of the push rod assembly 10, so as to drive the gear ring to rotate, and the like.
However, the implementation described in detail below may achieve better technical results than the specific implementation described above.
referring to fig. 4-7, fig. 4 is a schematic perspective view of a carrier wheel assembly according to the present invention; FIG. 5 is a schematic view of the load wheel assembly of FIG. 4 in an initial state; FIG. 6 is a schematic view of the load wheel assembly shown in FIG. 4; fig. 7 is a schematic diagram of the side-shifting state of the carrier wheel assembly in fig. 4.
In this embodiment, the carrier wheel assembly 9 includes a front fork 91 and a side shift carrier 93, wherein the front fork 91 is mounted to the bottom of the rear end of the fork body (i.e., the left fork 7 and the right fork 8), and the front fork 91 is rotatable relative to the fork body about a fork axis a. The front fork 91 is also rotatably mounted with a carrier wheel 92, the carrier wheel 92 being located at the rear end (with respect to the fork axis a) of the front fork 91 and having its axis of rotation parallel to the fork axis a.
The side shift wheel carrier 93 is rotatably connected to the front fork 91 about a wheel carrier rotation axis b, which is located behind the fork axis a and parallel to the fork axis a. Side shift wheel 95 is rotatably mounted on side shift wheel carrier 93, and side shift wheel 95 is located at the rear end (with respect to wheel carrier rotation axis b) of side shift wheel carrier 93 and has a rotation axis perpendicular to wheel carrier rotation axis b.
Two cross plates may be provided between the two side plates of side shift wheel carrier 93 so that side shift wheel 95 may be mounted between the two cross plates.
The rotation axis of the carrier wheel 92 relative to the front fork 91 and the wheel carrier rotation axis b may be further configured to coincide, which is simpler and more reliable in structure.
An elastic member 94 is further provided between front fork 91 and side shift carrier 93, and elastic member 94 has a tendency to contract, enabling side shift carrier 93 to have a tendency to turn upward toward front fork 91 about carrier rotational axis b.
The elastic member 94 may be a tension spring.
Front fork 91 is provided with a stopper member so that when side shift carrier 93 rotates relative to front fork 91 about carrier rotation axis b and the angle with front fork 91 is reduced to a predetermined angle, the stopper member abuts against a part of structure of side shift carrier 93 to prevent the angle between both from being further reduced.
The limiting component may be a limiting protrusion integrally formed on the upper edge of the front wheel fork 91, and a limiting surface abutting against the limiting protrusion at the predetermined angle may be further disposed on the upper edge of the side shift wheel carrier 93.
The front end of the front wheel fork 91 (relative to the wheel fork rotation axis a) is rotatably connected to the rear end of the push rod assembly 10, for example, the front end of the front wheel fork 91 may be provided with a shaft hole, which is connected to the push rod assembly 10 via a rotation pin so as to rotate around the push rod axis c, so that the push rod assembly 10 can drive the front wheel fork 91 to rotate around the wheel fork rotation axis a.
The state shown in fig. 5 is initially explained.
In the loaded state (fig. 6), the push rod assembly 10 pushes the front wheel fork 91 to rotate clockwise in the drawing by taking the wheel fork axis a as an axis, the included angle between the front wheel fork 91 and the side shift wheel carrier 93 is continuously reduced under the action of a tension spring and the like, the distance between the side shift wheel 95 and the ground is maintained, and the load wheel 92 descends to support the ground.
In the side shift state (fig. 7), the push rod assembly 10 continues to push the front wheel fork 91 to further rotate clockwise around the fork axis a, at this time, the included angle between the front wheel fork 91 and the side shift wheel carrier 93 has been reduced to a predetermined angle, the limiting component has been abutted against a part of the structure of the side shift wheel carrier 93, so as to prevent the angle between the front wheel fork 91 and the side shift wheel carrier 93 from further reducing, at this time, the side shift wheel 95 will contact with the ground, and the bearing wheel 92 will be separated from the ground.
Before the angle between the front fork 91 and the side shift carrier 93 is minimized, an elastic member such as a tension spring will urge the rear end of the side shift carrier 95 against the inside of the fork body.
In order to reduce wear and make the operation process smoother, a guide roller 96 may be further provided, the guide roller 96 being mounted to the side shift frame 93 at the rear end of the side shift wheel 95 with its rotation axis parallel to the reel frame rotation axis b.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above the utility model provides a tray carrier's carrier wheel assembly has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (6)

1. A load wheel assembly of a pallet jack, comprising:
a front fork (91) which can be mounted at the bottom of the rear end of the fork body and rotates relative to the fork body around a fork rotating shaft (a); the bearing wheel (92) is rotatably arranged at the rear end of the front wheel fork (91) and the rotating shaft of the bearing wheel is parallel to the wheel fork rotating shaft (a);
The side shifting wheel carrier (93) is rotatably connected with the front wheel fork (91) around a wheel carrier rotating shaft (b), and the wheel carrier rotating shaft (b) is positioned at the rear side of the wheel fork rotating shaft (a) and is parallel to the wheel fork rotating shaft (a); a side shifting wheel (95) is rotatably arranged at the rear end of the side shifting wheel carrier (93) and the rotating shaft of the side shifting wheel carrier is vertical to the wheel carrier rotating shaft (b);
An elastic member (94) that is provided between the front fork (91) and the side shift carrier (93) and that causes the side shift carrier (93) to have a tendency to turn toward the front fork (91) about the carrier rotation axis (b);
The front wheel fork (91) is provided with a limiting component, and when the included angle between the side shifting wheel frame (93) and the front wheel fork (91) is reduced to a preset angle, the limiting component prevents the angle between the side shifting wheel frame and the front wheel fork from being further reduced; the front end of the front wheel fork (91) can be rotatably connected with a push rod assembly (10), so that the front wheel fork (91) rotates around a wheel fork rotating shaft (a) under the action of the push rod assembly (10); when the push rod assembly (10) reaches the final end of its travel, the bottom of the side shift wheel (95) is lower than the bottom of the carrier wheel (92).
2. The load wheel assembly of a pallet jack of claim 1,
the rotational axis of the carrier wheel (92) relative to the front fork (91) coincides with the wheel carrier rotational axis (b).
3. The load wheel assembly of the pallet jack of claim 2,
The limiting component is a limiting convex block integrally formed on the upper edge of the front wheel fork (91), and a limiting surface which is abutted against the limiting convex block at the preset angle is arranged on the upper edge of the side shifting wheel frame (93).
4. The load wheel assembly of a pallet jack of any of claims 1 to 3,
The side shifting wheel frame (93) is also provided with a guide roller (96), the guide roller (96) is positioned at the rear end of the side shifting wheel (95), and the rotating shaft of the guide roller is parallel to the wheel frame rotating shaft (b).
5. The load wheel assembly of a pallet jack of claim 4,
two transverse plates are arranged between two side plates of the side shifting wheel frame (93), and the side shifting wheel (95) is arranged between the two transverse plates.
6. the load wheel assembly of a pallet jack of claim 4,
The elastic component (94) is a tension spring.
CN201920465973.0U 2019-04-08 2019-04-08 Bearing wheel assembly of pallet truck Active CN209740623U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201920465973.0U CN209740623U (en) 2019-04-08 2019-04-08 Bearing wheel assembly of pallet truck
US16/736,834 US11345382B2 (en) 2019-04-08 2020-01-08 Pallet truck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920465973.0U CN209740623U (en) 2019-04-08 2019-04-08 Bearing wheel assembly of pallet truck

Publications (1)

Publication Number Publication Date
CN209740623U true CN209740623U (en) 2019-12-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920465973.0U Active CN209740623U (en) 2019-04-08 2019-04-08 Bearing wheel assembly of pallet truck

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CN (1) CN209740623U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109835850A (en) * 2019-04-08 2019-06-04 杭叉集团股份有限公司 The carrying wheel assembly of tray truck
US10988155B2 (en) 2019-02-25 2021-04-27 Rehrig Pacific Company Adjustable span tine pallet jack
US11111122B2 (en) 2016-02-16 2021-09-07 Rehrig Pacific Company Lift and pallet

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11111122B2 (en) 2016-02-16 2021-09-07 Rehrig Pacific Company Lift and pallet
US10988155B2 (en) 2019-02-25 2021-04-27 Rehrig Pacific Company Adjustable span tine pallet jack
US11260890B2 (en) 2019-02-25 2022-03-01 Rehrig Pacific Company Adjustable span tine pallet jack
CN109835850A (en) * 2019-04-08 2019-06-04 杭叉集团股份有限公司 The carrying wheel assembly of tray truck
CN109835850B (en) * 2019-04-08 2023-08-01 杭叉集团股份有限公司 Bearing wheel assembly of pallet truck

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