CN217553934U - Material frock car - Google Patents

Abstract

The utility model relates to a material frock car, this material frock car includes: a base plate; the backrest extends upwards from one side edge of the bottom plate and forms an included angle with the bottom plate; the rollers are arranged at the bottom of the bottom plate at intervals; the rolling shaft is rotatably arranged on the side wall of the backrest, which is back to the bottom plate, around the axis of the rolling shaft, and the axis of the rolling shaft is parallel to the bottom plate; one end of the pull rod is rotatably arranged at the top end of the backrest. The utility model discloses with the roller bearing setting on the lateral wall of the back bottom plate of back, when the step is gone up and down to needs, utilize roller bearing and step contact, and then can go up and down the step smoothly to reduce the wearing and tearing to back and whole frock car effectively. Meanwhile, the matched pull rod is rotatably arranged at the top end of the backrest, when a rolling shaft of the backrest is in contact with the step, a user can adjust the pull rod to keep a proper angle with the backrest, the aim of saving labor is further fulfilled, and the use convenience of the material tool car is improved.

Description

Material frock car

Technical Field

The utility model relates to a frock car technical field, in particular to material frock car.

Background

The material tooling vehicle is a material transfer device widely used in a production line of a manufacturing workshop, and is used for transferring materials to assist in production, so that the production efficiency is effectively improved.

At present, in the manufacturing production, the condition that products or materials need to be carried to go up and down steps and go up and down laboratory insulating platforms is often used, and the existing material tool wagon can not meet the use requirement under the condition, so that the inconvenience of consigning the products and the materials to go up and down the steps and the laboratory insulating platforms is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a material frock car to optimize the structure of material frock car in the correlation technique, promote the convenience in use of material frock car.

In order to solve the technical problem, the utility model adopts the following technical scheme:

according to an aspect of the utility model provides a material frock car, this material frock car includes: a base plate; the backrest extends upwards from one side edge of the bottom plate and forms an included angle with the bottom plate; the rollers are arranged at the bottom of the bottom plate at intervals; the rolling shaft is rotatably arranged on the side wall of the backrest, which is back to the bottom plate, around the axis of the rolling shaft, and the axis of the rolling shaft is parallel to the bottom plate; and one end of the pull rod is rotatably arranged at the top end of the backrest.

In some embodiments of the present application, the pull rod includes two main rods arranged in parallel at intervals and a handle disposed between the two main rods; the lower extreme of mobile jib is rotationally located the top of back, the handle rotationally connects in two between the top of mobile jib.

In some embodiments of the present application, the material handling vehicle further includes two step gears, the two step gears are coaxially and alternately connected to the top of the backrest in a rotating manner, and are respectively disposed on two opposite sides of the pull rod; two opposite sides of the bottom end of the pull rod are respectively connected with one of the gear adjusting gears, so that the pull rod and the two gear adjusting gears can synchronously rotate.

In some embodiments of the present application, two opposite sides of the bottom end of the pull rod are respectively provided with a protruding portion in a protruding manner, and one sides of the two step gears facing the pull rod are both provided with a groove portion in a recessed manner; the two protruding parts are correspondingly and detachably embedded in the two groove parts one by one.

In some embodiments of the present application, a top of the backrest is concavely provided with a telescopic slot extending downwards, and an extending direction of the telescopic slot is consistent with an extending direction of the backrest; the two grading gears are respectively arranged on two sides of the top opening of the telescopic groove, and the bottom end of the pull rod is opposite to the top opening of the telescopic groove; when the pull rod rotates to be parallel to the backrest, the bottom end of the pull rod can slide into the telescopic groove, and the protruding portion is separated from the groove portion.

In some embodiments of the present application, the top of the backrest is respectively provided with an assembling groove at two opposite sides of the telescopic groove; the two step gears are respectively and rotatably arranged in the assembly groove.

In some embodiments of the present application, a step portion is convexly disposed in the assembling groove, and the step portion is located in a rotation range of the step-adjusting gear; the step-adjusting gear is of a half-gear structure, and a circumferential side wall of the step-adjusting gear is provided with a propping surface; when the pull rod rotates along with the gear to be parallel to the backrest, the abutting surface abuts against the step part, and the protrusion part and the groove part are opposite to the top end opening of the telescopic groove.

In some embodiments of the present application, an elastic clamping piece is disposed on a side wall of the assembly groove close to the bottom plate, the elastic clamping piece extends from the side wall of the assembly groove to the step-adjusting direction, and one end of the elastic clamping piece close to the step-adjusting gear abuts against a tooth groove of the step-adjusting gear; when the gear of adjusting the level was rotatory, the gear of adjusting the level can extrude the elasticity card, the elasticity card can take place elastic deformation and by gear of adjusting the level's a tooth's socket removes to in another tooth's socket.

In some embodiments of the present application, a telescopic part is disposed on a side wall of the assembling groove far away from the pull rod, and the telescopic part can be extended and retracted along an axial direction of the step-adjusting gear; when the telescopic piece extends, the telescopic piece can extend into a tooth groove of the gear adjusting; when the telescopic piece contracts, the telescopic piece can exit out of the tooth groove of the gear adjusting gear.

In some embodiments of the present application, a side wall of the backrest facing away from the bottom plate is provided with an accommodating groove and a mounting groove; the mounting grooves are arranged on one side of the containing groove at intervals; a through hole communicated with the mounting groove is formed in the groove side wall, close to the mounting groove, of the accommodating groove, and a fixing hole arranged opposite to the through hole is formed in the groove side wall, far away from the mounting groove, of the accommodating groove; the roller comprises a shaft column and a roller; the axial direction of the shaft column is arranged in parallel with the bottom plate, the shaft column can penetrate through the through hole from the mounting groove and extend into the containing groove, and the end part of the shaft column extending into the containing groove can be fixed in the fixing hole; the roller is arranged in the accommodating groove and is rotatably sleeved on the shaft post.

According to the above technical scheme, the embodiment of the utility model provides an at least, following advantage and positive effect have:

the utility model discloses in the material frock car, with the roller bearing setting on the lateral wall of the back bottom plate, when the step is gone up and down to needs, utilize roller bearing and step contact, and then can go up and down the step smoothly to reduce the wearing and tearing to back and whole frock car effectively. Meanwhile, the matched pull rod is rotatably arranged at the top end of the backrest, when a rolling shaft of the backrest is in contact with the step, a user can adjust the pull rod to keep a proper angle with the backrest, the aim of saving labor is further fulfilled, and the use convenience of the material tool car is improved.

Drawings

Fig. 1 is a schematic structural diagram of a material handling vehicle according to an embodiment of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a state diagram of the material handling vehicle of fig. 1 in use.

Fig. 4 is a partial structural schematic diagram of fig. 1.

Fig. 5 is a schematic view of the roller assembly of fig. 4.

Fig. 6 is a schematic view of the structure of the drawbar of fig. 1.

Fig. 7 is an enlarged view of the top layout of the tie rod of fig. 6.

Fig. 8 is an exploded view of fig. 7.

Fig. 9 is an enlarged view of the layout of the bottom of the drawbar in fig. 6.

Fig. 10 is an enlarged schematic view of region a in fig. 1.

Fig. 11 is an exploded view of fig. 10.

Fig. 12 is a schematic view of the step gear of fig. 11.

Fig. 13 is a schematic view of the step gear of fig. 12 from another perspective.

Fig. 14 is a schematic view of the structure of fig. 11 with the step gear removed.

Fig. 15 is a schematic view of the structure of the telescoping member of fig. 14.

Fig. 16 is a schematic view of the structure of fig. 11 from another perspective.

Fig. 17 is a schematic view of the structure of fig. 16 in another state.

Fig. 18 is a schematic view of the structure of fig. 2 in another state.

Fig. 19 is a schematic view of the structure of fig. 18 in another state.

The reference numerals are illustrated below: 1. a base plate; 2. a backrest; 21. an accommodating groove; 211. a through hole; 212. a fixing hole; 22. mounting grooves; 23. a nut; 24. a cover plate; 25. assembling a groove; 251. a rotating shaft part; 252. a step portion; 26. a telescopic groove; 261. avoiding a position groove; 3. a roller; 4. a roller; 41. a column shaft; 42. a drum; 5. a pull rod; 51. a main rod; 52. a handle; 53. a rotating shaft; 54. a boss portion; 6. a step-adjusting gear; 61. a groove part; 62. a shaft hole; 63. an abutting surface; 7. an elastic card; 8. a telescoping member; 81. a fixed cylinder; 82. a telescopic column.

Detailed Description

Exemplary embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature and not as restrictive.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

At present, in the production of the manufacturing industry, the condition that products or materials need to be carried to go up and down steps and go up and down laboratory insulation tables is often used, the existing material tool vehicle cannot meet the use requirement under the condition, and the inconvenience for consigning the products and the materials to go up and down the steps and go up and down the laboratory insulation tables is caused.

Fig. 1 is a schematic structural diagram of a material handling vehicle according to an embodiment of the present invention. Fig. 2 is a side view of fig. 1. Fig. 3 is a state diagram of the material handling cart of fig. 1 in use.

Referring to fig. 1 to 3, a material fixture according to an embodiment of the present invention mainly includes a bottom plate 1, a backrest 2, a roller 3, a roller 4, a pull rod 5, a step-adjusting gear 6, an elastic clip 7, and an expansion piece 8.

Wherein, the bottom plate 1 is of a plate-shaped structure and is horizontally arranged. The base plate 1 is used for carrying materials, and then the materials loaded on the base plate 1 are carried.

The backrest 2 is arranged on one side of the bottom plate 1, the backrest 2 is formed by upward extending of one side edge of the bottom plate 1, and an included angle is formed between the backrest 2 and the bottom plate 1. The backrest 2 is used to enable the floor panel 1 to be loaded with more material and to effectively prevent the material on the floor panel 1 from falling.

In some embodiments, the backrest 2 is integrally formed on one side of the base plate 1, and the integral structure of the backrest 2 and the base plate 1 can improve the structural strength between the backrest 2 and the base plate 1. It should be noted that, in other embodiments, the backrest 2 and the bottom plate 1 may be detachably connected as a whole.

Referring to fig. 2 and 3, in some embodiments, the backrest 2 is perpendicular to the base plate 1, that is, the backrest 2 extends vertically, and an included angle between the backrest 2 and the base plate 1 is a right angle. It should be noted that in some embodiments, the included angle between the backrest 2 and the bottom plate 1 is an acute angle or an obtuse angle close to a right angle.

Referring to fig. 1 to 3, the roller 3 is disposed at the bottom of the bottom plate 1, and the roller 3 is used for supporting the whole material handling vehicle and facilitating the movement of the material handling vehicle. The gyro wheel 3 is equipped with a plurality ofly, and a plurality of gyro wheels 3 set up in the bottom of bottom plate 1 with spacing each other, and the support stability of material frock car can be improved in the cooperation of a plurality of gyro wheels 3 to improve the mobility of material frock car.

It should be noted that in some embodiments, a plurality of rollers 3 may be provided, and a directional wheel and a universal wheel may be used to cooperate with each other to facilitate the turning movement of the material handling vehicle. In other embodiments, the plurality of rollers 3 may be all universal wheels. In addition, the universal wheel can adopt a common universal wheel and can also adopt a damping universal wheel.

Referring to fig. 1 to 3, the roller 4 is disposed on a side wall of the backrest 2 facing away from the bottom plate 1, and the roller 4 can rotate on the backrest 2 around its own axis. And the axes of the rollers 4 are arranged in parallel with the bottom plate 1, i.e. the axes of the rollers 4 are arranged horizontally. The roller 4 is provided in plural, and plural rollers 4 are arranged in parallel at intervals on the side wall of the backrest 2.

Since a part of the outer circumferential surface of the roller 4 protrudes from the sidewall of the backrest 2, when the user needs to go up or down a step, the roller 4 is brought into contact with the step by controlling the inclination of the backrest 2, and the user can roll the roller 4, thereby smoothly going up or down the step, as shown in fig. 3. At this time, the material loaded on the base plate 1 may abut against the backrest 2, be held between the backrest 2 and the base plate 1, and not easily fall off the backrest 2. In addition, the rolling shaft 4 is in contact with the step, so that the abrasion of the backrest 2 and the whole tool car can be effectively reduced.

Fig. 4 is a partial schematic view of fig. 1. Fig. 5 is a schematic view of the structure of fig. 4 after the roller 4 is assembled.

Referring to fig. 4 and fig. 5, and with reference to fig. 1, a receiving slot 21 is formed on a side wall of the backrest 2 facing away from the bottom plate 1, and a plurality of rollers 4 are arranged in the receiving slot 21 in parallel and at intervals.

In some embodiments, the side wall of the backrest 2 facing away from the base plate 1 is further provided with mounting grooves 22, the mounting grooves 22 are spaced apart from one side of the receiving groove 21, and the mounting grooves 22 are used for providing a mounting space for mounting the roller 4. Specifically, a plurality of through holes 211 communicating with the mounting groove 22 are formed in the groove side wall of the receiving groove 21 close to the mounting groove 22, and fixing holes 212 arranged opposite to the through holes 211 are formed in the groove side wall of the receiving groove 21 far from the mounting groove 22, and the plurality of fixing holes 212 are arranged in one-to-one correspondence to the through holes 211. The line connecting the through hole 211 and the fixing hole 212 is in a horizontal direction, i.e., arranged in parallel with the base plate 1. The through holes 211 and the fixing holes 212 are used to fix both ends of the roller 4, respectively.

Referring to fig. 4 and 5, in some embodiments, the roller 4 includes a shaft column 41 and a roller 42 movably sleeved on the shaft column 41, the shaft column 41 is disposed at an axis of the roller 42, and the roller 42 can rotate around the shaft column 41. The aperture of the through hole 211 is larger than the diameter of the shaft post 41. Therefore, when mounting, the roller 42 may be previously placed in the receiving groove 21 and placed between the through hole 211 and the corresponding fixing hole 212. The shaft post 41 passes through the through hole 211 from the mounting groove 22, extends into the accommodating groove 21, and directly passes through the roller 42. The end of the shaft column 41 extending into the accommodating groove 21 can be passed through the other end of the roller 42 and can be fixed in the fixing hole 212. Finally, the end of the stud 41 positioned in the mounting groove 22 is fixed by the nut 23, and the stud 41 can be fixed between the through hole 211 and the fixing hole 212. At this time, the axial direction of the spindle post 41 is arranged in parallel with the base plate 1, and the drum 42 can be relatively rotated on the spindle post 41 stably.

Referring to fig. 1, in some embodiments, a cover plate 24 is further disposed on a side wall of the backrest 2 facing away from the bottom plate 1, and the cover plate 24 is used for covering the installation groove 22 to maintain the integrity of the appearance of the backrest 2.

Referring to fig. 1 to 3, the pull rod 5 is rotatably disposed at the top end of the backrest 2. Through pulling pull rod 5, can drive back 2 and whole material frock car and remove. When going up and down the step, can rotate pull rod 5, the angle of adjustment pull rod 5 and back 2 makes human pulling force and advancing direction keep unanimous, and then reaches laborsaving purpose, promotes the convenience of use of material frock car.

Fig. 6 is a schematic view of the structure of the tie rod 5 in fig. 1. Fig. 7 is an enlarged view of the top layout of the tie bar 5 of fig. 6. Fig. 8 is an exploded view of fig. 7.

Referring to fig. 6 to 8, in some embodiments, the pull rod 5 includes two main rods 51 arranged in parallel and spaced apart from each other, and a handle 52 disposed between the two main rods 51. One end of the handle 52 is connected to the top end of one main lever 51, and the other end of the handle 52 is connected to the top end of the other main lever 51. The lower ends of the two main rods 51 are rotatably arranged at the top end of the backrest 2. Therefore, the carrying personnel can pull and control the handle 52, further control the pull rod 5 to rotate, and drive the whole material tooling vehicle to move.

In some embodiments, the handle 52 is rotatably connected between the top ends of the two main rods 51. That is, both ends of the handle 52 are rotatably connected to the top end of a main lever 51 through a rotating shaft 53, respectively. Therefore, the handle 52 can be rotated with respect to the main lever 51, so that the carrier can always hold the handle 52 when controlling the draw bar 5, thereby improving the convenience of use.

In some embodiments, the handle 52 is generally U-shaped, and two ends of the handle 52 are rotatably connected between the top ends of the two main rods 51. It should be noted that in other embodiments, the handle 52 may also be a straight structural member or other structural members.

Fig. 9 is an enlarged view of the layout of the bottom of the tie rod 5 in fig. 6. Fig. 10 is an enlarged schematic view of region a in fig. 1. Fig. 11 is an exploded view of fig. 10. Fig. 12 is a schematic view of the step-adjusting gear 6 in fig. 11.

Referring to fig. 9 to 12, two step gears 6 are provided, and the two step gears 6 are coaxially and alternately rotatably connected to the top of the backrest 2 and are respectively provided at opposite sides of the pull rod 5. The two step-adjusting gears 6 are respectively used for being connected with two opposite sides of the bottom end of the pull rod 5, namely, the two opposite sides of the bottom end of the pull rod 5 are respectively connected with one step-adjusting gear 6, so that the pull rod 5 can synchronously rotate along with the two step-adjusting gears 6, and further the rotation of the pull rod 5 relative to the backrest 2 is realized. Specifically, one side of the bottom end of the main rod 51, which faces away from the other main rod 51, is respectively provided with a step adjusting gear 6, and the two main rods 51 are both located on the two step adjusting gears 6, so that the two main rods 51 can synchronously rotate along with the step adjusting gears 6.

In some embodiments, two protrusions 54 are protruded from two opposite sides of the bottom end of the pull rod 5, that is, two protrusions 54 are protruded from two opposite sides of the bottom end of one main rod 51 facing away from the other main rod 51. One sides of the two stage regulating gears 6 facing the pull rod 5 are both concavely provided with a groove part 61; the two protruding portions 54 are fitted into the two groove portions 61 in a one-to-one correspondence and detachable manner. Therefore, the protrusion 54 is fitted into the groove 61, so that the pull rod 5 and the step gear 6 can be rotated in synchronization, and the protrusion 54 is disengaged from the groove 61, so that the pull rod 5 and the step gear 6 can be separated from each other.

Fig. 13 is a schematic view of the step gear 6 of fig. 12 from another perspective. Fig. 14 is a schematic view of the step-adjusting gear 6 of fig. 11 with the step-adjusting gear removed.

Referring to fig. 11-14, in some embodiments, the top of the backrest 2 is provided with two spaced-apart and oppositely-arranged assembling slots 25. Two assembly grooves 25 are respectively arranged at two opposite sides of the pull rod 5, and the two step-adjusting gears 6 are respectively rotatably arranged in the assembly grooves 25.

Referring to fig. 13 and 14, in some embodiments, a rotating shaft portion 251 is convexly disposed on a sidewall of the assembling groove 25 away from the other assembling groove 25, and a shaft hole 62 matched with the rotating shaft portion 251 is disposed on a shaft center of the step-adjusting gear 6. The step gear 6 is rotatably attached to the rotating shaft portion 251 through the shaft hole 62, and is rotatable in the fitting groove 25. The rotating shaft portions 251 in the two fitting grooves 25 are arranged coaxially opposite to each other, thereby keeping the two step gears 6 coaxially arranged opposite to each other.

Referring to fig. 10 to 14, in some embodiments, an elastic clip 7 is disposed on a side wall of the mounting groove 25 close to the bottom plate 1, the elastic clip 7 extends from the side wall of the mounting groove 25 toward the step-adjusting direction, and an end of the elastic clip 7 close to the step-adjusting gear 6 abuts against a tooth groove of the step-adjusting gear 6. Therefore, the elastic clamping piece 7 can abut against the gear adjusting gear 6 to limit the gear adjusting gear 6, the gear adjusting gear 6 is blocked to rotate to a certain degree, the gear adjusting gear 6 is locked, the pull rod 5 is further locked, and the pull rod 5 is kept in a certain angle state.

Meanwhile, when the pull rod 5 drives the gear 6 to rotate, the gear 6 can extrude the elastic clamping piece 7, the elastic clamping piece 7 can be elastically deformed and can move to the other tooth groove from the tooth groove of the gear 6, the rotation angle of the gear 6 and the pull rod 5 is changed, and the pull rod 5 is kept in the adjusted angle state.

All be provided with elasticity card 7 in two assembly grooves 25, two elasticity cards 7 support to lean on in a gear 6 that adjusts stage one-to-one, and then improve the state retentivity to pull rod 5. It should be noted that, in other embodiments, the elastic clamping piece 7 may be disposed in only one of the assembly grooves 25, and the elastic clamping piece 7 is not disposed in the other assembly groove 25.

In some embodiments, the elastic clamping piece 7 is of an arc-shaped bending structure, and the elastic clamping piece 7 of the arc-shaped bending structure has elasticity and can more firmly clamp the tooth grooves of the step-adjusting gear 6, so that the angle state of the step-adjusting gear 6 and the pull rod 5 can be more favorably maintained.

Referring to fig. 10-14, in some embodiments, the slot side wall of the assembly slot 25 away from the pull rod 5 is provided with a telescopic member 8. One end of the telescopic member 8 is fixed to the groove side wall of the fitting groove 25, and the other end of the telescopic member 8 can be extended and contracted in the axial direction of the step-adjusting gear 6. And when the telescopic piece 8 extends, the telescopic piece 8 can extend into a tooth groove of the step-adjusting gear 6 to limit the step-adjusting gear 6, so that the step-adjusting gear 6 is prevented from rotating, and the angle states of the step-adjusting gear 6 and the pull rod 5 are locked. Simultaneously, when extensible member 8 contracts, extensible member 8 can withdraw from the tooth's socket of gear 6 of adjusting a step, and gear 6 of adjusting a step can rotate this moment, and then can adjust the angle state of gear 6 of adjusting a step and pull rod 5.

Fig. 15 is a schematic view of the structure of the telescopic member 8 in fig. 14.

Referring to fig. 14 and 15, in some embodiments, the telescopic member 8 includes a fixed cylinder 81 and a telescopic column 82, and the fixed cylinder 81 is movably sleeved on the telescopic column 82. The fixed cylinder 81 is installed inside the side wall of the assembly groove 25, namely, the fixed cylinder 81 is fixedly installed inside the backrest 2, and the telescopic column 82 can stretch out of the fixed cylinder 81, stretch into the assembly groove 25 and stretch into the tooth grooves of the step-adjusting gear 6 to lock the step-adjusting gear 6. Meanwhile, when the telescopic column 82 is retracted into the fixed cylinder 81, the telescopic column 82 can exit the tooth groove of the step gear 6 and exit the assembly groove 25, thereby unlocking the step gear 6.

Fig. 16 is a schematic view of the structure of fig. 11 from another perspective. Fig. 17 is a schematic view of the structure of fig. 16 in another state. Fig. 18 is a schematic view of the structure of fig. 2 in another state. Fig. 19 is a schematic view of the structure of fig. 18 in another state.

Referring to fig. 16 to 19, in some embodiments, the top of the backrest 2 is recessed with a downwardly extending telescopic slot 26, and the extending direction of the telescopic slot 26 is the same as the extending direction of the backrest 2. The telescopic groove 26 is located under the pull rod 5, the pull rod 5 is right opposite to the top end opening of the telescopic groove 26, and the two step gears 6 are respectively arranged on two sides of the top end opening of the telescopic groove 26. Therefore, when the up-down step is not required, the pull rod 5 can be rotated to be parallel to the backrest 2, as shown in fig. 18, and the protrusion 54 and the groove 61 are opened to the tip of the expansion groove 26. Therefore, the bottom end of the pull rod 5 can slide into the telescopic slot 26, as shown in fig. 19, and the raised part is disengaged from the recessed part 61.

Specifically, the telescopic grooves 26 are provided in two, and the two telescopic grooves 26 are arranged in one-to-one correspondence with the two main rods 51. The two main rods 51 can be inserted into and arranged inside the telescopic slot 26 in a one-to-one correspondence.

Referring to fig. 16 and 17, in some embodiments, the side wall of the telescopic slot 26 is provided with a downward extending anti-space slot 261, the extending direction of the anti-space slot 261 is the same as that of the telescopic slot 26, and the length of the anti-space slot 261 is the same as or substantially the same as that of the telescopic slot 26. When the pull rod 5 is rotated to be parallel to the backrest 2, the protrusion 54 and the groove 61 are both aligned with the top opening of the avoiding groove 261, so that the protrusion 54 can slide in the avoiding groove 261 when the bottom end of the pull rod 5 slides into the telescopic groove 26.

Referring to fig. 12 to 18, in some embodiments, the step-adjusting gear 6 is of a half gear structure, and a circumferential side wall of the step-adjusting gear 6 has an abutting surface 63. Meanwhile, a stepped portion 252 is provided in the fitting groove 25 in a protruding manner, and the stepped portion 252 is located within the rotation range of the stepped gear 6. When the pull rod 5 is rotated to be parallel to the backrest 2, as shown in fig. 17 and 18, the abutment surface 63 abuts against the step portion 252, the pull rod 5 and the step gear 6 are prevented from further rotating, and the protrusion 54 and the groove 61 are aligned with the top end opening of the telescopic slot 26. Namely, the abutting surface 63 and the step portion 252 are in abutting fit, so that the rotation of the pull rod 5 can be easily controlled to be parallel to the backrest 2, and the pull rod 5 can be easily retracted into the telescopic slot 26.

Based on the technical scheme, the embodiment of the utility model provides a have following advantage and positive effect:

the utility model discloses in the material frock car, set up roller bearing 4 on the lateral wall of the back bottom plate 1 of back 2 dorsad, when the step is gone up and down to needs, utilize roller bearing 4 and step contact, and then can go up and down the step smoothly to prevent back 2 and whole frock car wearing and tearing effectively. Meanwhile, the matching pull rod 5 is rotatably arranged at the top end of the backrest 2, when the rolling shaft 4 of the backrest 2 is in contact with the step, a user can adjust the pull rod 5 to keep a proper angle with the backrest 2, so that the aim of saving labor is fulfilled, and the use convenience of the material loading vehicle is improved.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. A material handling vehicle, comprising:

a base plate;

the backrest extends upwards from one side edge of the bottom plate and forms an included angle with the bottom plate;

the rollers are arranged at the bottom of the bottom plate at intervals;

the rolling shaft is rotatably arranged on the side wall of the backrest, which is back to the bottom plate, around the axis of the rolling shaft, and the axis of the rolling shaft is parallel to the bottom plate;

and one end of the pull rod is rotatably arranged at the top end of the backrest.

2. The material handling vehicle as claimed in claim 1, wherein the pull rod comprises two main rods arranged in parallel at intervals and a handle arranged between the two main rods;

the lower end of the main rods is rotatably arranged at the top end of the backrest, and the handle is rotatably connected between the top ends of the two main rods.

3. The material handling vehicle of claim 1, further comprising two step gears, wherein the two step gears are coaxially and alternately rotatably connected to the top of the backrest and are respectively disposed on opposite sides of the pull rod; two opposite sides of the bottom end of the pull rod are respectively connected with one of the gear adjusting gears, so that the pull rod and the two gear adjusting gears can synchronously rotate.

4. The material handling vehicle according to claim 3, wherein opposite sides of the bottom end of the pull rod are respectively provided with a convex portion in a convex manner, and one sides of the two step gears facing the pull rod are respectively provided with a concave portion in a concave manner; the two protruding parts are in one-to-one correspondence and are detachably embedded in the two groove parts.

5. The material handling vehicle as claimed in claim 4, wherein the top of the backrest is recessed with a downwardly extending telescopic slot, and the extending direction of the telescopic slot is the same as that of the backrest;

the two grading gears are respectively arranged on two sides of the top opening of the telescopic groove, and the bottom end of the pull rod is opposite to the top opening of the telescopic groove;

when the pull rod rotates to be parallel to the backrest, the bottom end of the pull rod can extend into the telescopic groove in a sliding mode, and the protruding portion is separated from the groove portion.

6. The material handling vehicle of claim 5, wherein the top of the backrest is provided with an assembly groove on each of two opposite sides of the telescopic groove; the two step gears are respectively and rotatably arranged in the assembly groove.

7. The material handling vehicle of claim 6, wherein a step is provided in the assembly groove, and the step is located in a rotation range of the step gear;

the step-adjusting gear is of a half-gear structure, and a circumferential side wall of the step-adjusting gear is provided with an abutting surface;

when the pull rod rotates along with the gear to be parallel to the backrest, the abutting surface abuts against the step part, and the protrusion part and the groove part are right opposite to the top end opening of the telescopic groove.

8. The material handling vehicle according to claim 6, wherein a resilient locking piece is provided on a side wall of the mounting groove close to the bottom plate, the resilient locking piece extends from the side wall of the mounting groove toward the gear, and one end of the resilient locking piece close to the gear abuts against a tooth groove of the gear;

when the gear of adjusting the level was rotatory, the gear of adjusting the level can extrude the elasticity card, the elasticity card can take place elastic deformation and by gear of adjusting the level's a tooth's socket removes to in another tooth's socket.

9. The material handling vehicle as claimed in claim 6, wherein a telescopic member is provided on a side wall of the assembly groove far away from the pull rod, and the telescopic member can be extended and retracted along the axial direction of the step-adjusting gear;

when the telescopic piece extends, the telescopic piece can extend into a tooth groove of the gear adjusting wheel;

when the telescopic piece is contracted, the telescopic piece can exit out of the tooth groove of the gear shifting wheel.

10. The material handling vehicle according to claim 1, wherein a receiving groove and a mounting groove are formed on a side wall of the backrest facing away from the bottom plate;

the mounting grooves are arranged on one side of the containing groove at intervals;

a through hole communicated with the mounting groove is formed in the groove side wall, close to the mounting groove, of the accommodating groove, and a fixing hole arranged opposite to the through hole is formed in the groove side wall, far away from the mounting groove, of the accommodating groove;

the roller comprises a shaft column and a roller; the axial direction of the shaft post is arranged in parallel with the bottom plate, the shaft post can penetrate through the through hole from the mounting groove and extend into the containing groove, and the end part of the shaft post extending into the containing groove can be fixed in the fixing hole; the roller is arranged in the accommodating groove and is rotatably sleeved on the shaft post.

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