Self-locking cart for semiconductor material transfer

Abstract

The utility model relates to a self-locking cart for semiconductor material transfer, which comprises a cart body, a storage plate, a wheel assembly, a handle and a brake mechanism, the wheel assembly comprises a directional wheel rotatably connected to the bottom of the cart body around a rotating shaft arranged left and right, and the handle is rotatably connected with the cart body around a rotating shaft arranged in the left-right direction. The handle is provided with a grip part positioned on the rear side of the rotating shaft and a connecting part positioned on the front side of the rotating shaft; each brake mechanism comprises a brake box fixed to the bottom of the vehicle body and located above the corresponding directional wheel, a brake rod arranged in the brake box in an up-down sliding and penetrating mode, and an elastic piece arranged in the brake box and used for applying downward force to the brake rod. The two ends of the traction piece are connected with the brake rod and the connecting part respectively, and the traction piece is used for applying upward force to the brake rod. According to the utility model, the operation steps are simplified, the misoperation is avoided, the material transfer efficiency is improved, the cost loss is avoided, and the potential safety hazard is eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of self-locking trolleys for semiconductor material operation, applicable to semiconductor chip processing technical field. BACKGROUND

[0002] In semiconductor chip packaging process, handcart is usually used to transport production materials, and the structure of the handcart currently used mostly includes a frame, a handle fixed to the rear side of the frame, two directional wheels and two universal wheels at the bottom of the frame. The production personnel exerts force on the handle to realize the forward movement and turning of the handcart. In actual use, the handcart usually has a brake mechanism to prevent the handcart from sliding when the personnel is taking or placing materials or when there is a slope on the ground. The brake mechanism on the existing handcart is usually a pedal brake mechanism arranged at the wheel, which needs to be stepped down at each wheel to realize braking when the production personnel stops the handcart. To release the brake, the pedal at each wheel also needs to be lifted to continue pushing, which is not only cumbersome to operate, but also easy for the production personnel to forget to step down or release the brake, making it inconvenient to use and affecting the efficiency of material transportation.

[0003] In addition to the above-mentioned pedal brake structure, there are also brake structures in the prior art that are operated by hand, such as the handcart disclosed in Patent No. CN209351445U, in which the brake structure is arranged coaxially with the brake wheel on the wheel, and the brake lever is operated by the brake control lever to make it inserted or separated from the teeth, thereby realizing braking. Although this structure is more convenient to operate than the pedal structure, on the one hand, the materials transported in the semiconductor packaging process are mostly heavy, and this kind of toothed brake structure will immediately lock the wheel when braking, so this structure is easy to cause the materials placed on the handcart to overturn or even fall under the action of inertia. On the other hand, during the pushing process, the production personnel needs to operate the handle of the handcart and the brake control lever at the same time to ensure that the handcart can be smoothly pushed, but simultaneous operation of the handle and the brake control lever will not only distract the personnel, but also reduce the control of the handcart by the production personnel, which is easy to collide with other vehicles or equipment during the pushing process, thereby causing unnecessary losses and wasting costs. SUMMARY

[0004] To solve the defects of the prior art, the utility model provides a self-locking trolley for semiconductor material operation.

[0005] The utility model discloses a technical scheme is: a kind of self-locking trolley for semiconductor material operation, including car body, at least one layer of article placing plate for placing semiconductor material being horizontally arranged in car body and being used, wheel assembly being arranged in the lower of car body, handle being connected to the rear side of car body, wheel assembly includes at least one directional wheel being rotatably connected to the bottom of car body around left and right arrangement, self-locking trolley further includes the brake mechanism corresponding with directional wheel in quantity and for limiting the rotation of directional wheel.

[0006] Handle is rotatably connected with car body around rotating shaft along left and right direction, and handle has handle part located rear side of rotating shaft and connecting part located front side of rotating shaft, and connecting part has first position and second position above first position by handle rotation;Each brake mechanism includes brake box fixed to the bottom of car body and located above corresponding directional wheel, brake rod slidingly arranged in brake box, elastic member arranged in brake box and used for applying downward force to brake rod, traction member with two ends respectively connected with brake rod and connecting part and used for applying upward force to brake rod;Brake mechanism has at least two working states, when it is in first working state, connecting part is located in first position, elastic member is released, and lower end of brake rod abuts against directional wheel;When brake mechanism is in second working state, connecting part is located in second position, elastic member is compressed, brake rod is away from directional wheel and lower end of brake rod is separated from directional wheel.When production personnel do not operate self-locking trolley, brake rod in brake mechanism will abut against directional wheel under the action of force applied by elastic member, and directional wheel is limited to rotate by friction force between brake rod and directional wheel, so that handcart is limited in situ, and the phenomenon of car slipping is avoided;When production personnel operate self-locking trolley, personnel apply pushing force to handle, the pushing force applied to handle will be decomposed into two forces in forward and downward directions, wherein the downward force drives handle to rotate, so that connecting part on handle rotates from first position to second position, then traction member is pulled, and brake rod is driven by traction member, so that brake rod is separated from directional wheel, and the limitation on directional wheel is released;The forward force pushes trolley forward, so that brake releasing and trolley pushing are realized simultaneously, by taking handle as operating member and cooperating with brake mechanism, personnel can automatically release brake when operating trolley, and personnel will automatically brake when releasing trolley, without additional brake operation, not only operation steps are simplified, concentration and controllability of personnel operating trolley are improved, but also personnel error is avoided, and operation efficiency is improved;In addition, brake is carried out by friction force between brake rod and directional wheel, so that there is certain buffer between trolley deceleration and stopping after starting brake, the material placed on trolley is prevented from falling down under the action of inertia, unnecessary loss is avoided, and cost waste is reduced.

[0007] Further, the wheel assembly further comprises a first wheel frame corresponding in number and orientation to the directional wheels and fixed to the bottom of the vehicle body, each directional wheel being rotatably connected to the first wheel frame about a first rotation axis. The directional wheels are oriented by the first wheel frame, and at the same time, a brake distance is left between the brake mechanism and the directional wheels, facilitating the brake lever to apply or release the brake to the directional wheels. Specifically, the directional wheels and the first wheel frame are each provided with at least one pair and are respectively located at two corner edges of the rear side of the bottom of the vehicle body, so as to improve the stability of the trolley when being pushed.

[0008] Further, the wheel assembly further comprises at least one steering wheel provided on the bottom of the vehicle body, a second wheel frame corresponding in number to the steering wheel and rotatably connected to the bottom of the vehicle body about a second rotation axis arranged vertically, and the steering wheel is rotatably connected to the second wheel frame about a third rotation axis arranged horizontally. The steering function of the steering wheel is realized by the second wheel frame, facilitating the personnel to operate the trolley to steer. Specifically, the steering wheel and the second wheel frame are each provided with at least one pair and are respectively located at two corner edges of the front side of the bottom of the vehicle body, so as to improve the stability of the trolley when being pushed.

[0009] Further, the vehicle body comprises a frame, a stabilizing frame arranged horizontally below the frame, at least four shock absorbers connected between the frame and the stabilizing frame, the at least four shock absorbers being respectively located at the corner edges of the stabilizing frame, the wheel assembly being connected to the bottom of the stabilizing frame, the brake box being fixed in the stabilizing frame, and the storage plate being arranged in the frame. The wheel assembly and the storage plate are arranged on the stabilizing frame and the frame respectively, and the shock absorbers are arranged between the stabilizing frame and the frame, so as to improve the shock absorption performance of the trolley and avoid damage to the semiconductor materials such as chips and wafers placed on the storage plate caused by the vibration generated during the pushing of the trolley.

[0010] Further, the outer walls at the corner edges of the stabilizing frame are each provided with an anti-collision strip, which not only improves the shock absorption performance of the trolley when colliding with other objects, avoids damage to the semiconductor materials caused by the vibration, but also avoids damage to the trolley itself or the collided object caused by the collision.

[0011] Further, the elastic member is a compression spring, the elastic member is sleeved on the brake lever, and the two ends of the elastic member are respectively in abutment with the brake lever and the top of the brake box. The compression spring applies a downward force to the brake lever, so as to limit the rotation of the directional wheel.

[0012] Further, the lower end of the brake lever is made of rubber material, which improves the friction between the brake lever and the directional wheel, thereby improving the braking effect.

[0013] Further, the brake mechanism further comprises a limiting member fixed to the vehicle body and having a limiting hole, a limiting rod inserted into the limiting hole and having one end fixedly connected to the connecting portion, the limiting rod has two limiting blocks, the portion of the limiting rod inserted into the limiting hole is located between the two limiting blocks, the diameter of the limiting hole is larger than the diameter of the limiting rod, and the diameter of the limiting block is larger than the diameter of the limiting hole. Through cooperation of the limiting member, the limiting block and the limiting rod, the rotating range of the handle is limited, the brake mechanism is prevented from being damaged due to too large force applied by the person to the handle, and the use stability of the self-locking cart is improved.

[0014] Due to the above technical scheme, the utility model has the following advantages compared with the prior art:

[0015] The self-locking cart for semiconductor material transportation has simple structure and convenient operation, the handle is used as an operating member and cooperates with the brake mechanism, so that the brake can be automatically released when the person operates the cart, and the brake is automatically applied when the person releases the cart, without the need for additional brake operation, which not only simplifies the operation steps, improves the concentration and controllability of the person operating the cart, but also avoids the person's mistake and improves the transportation efficiency; in addition, the brake is applied through the friction force between the brake rod and the directional wheel, so that the cart has a certain buffer from deceleration to stop after starting the brake, the materials placed on the cart are prevented from falling down due to inertia, unnecessary loss is avoided, and cost waste is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Some specific embodiments of the utility model will be described in detail below with reference to the accompanying drawings in an exemplary but not limiting manner. The same reference signs in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the drawings:

[0017] Figure 1 is a structural schematic diagram of one embodiment of the utility model Figure 1 ;

[0018] Figure 2 is Figure 1 a structural schematic diagram of the embodiment shown in the drawings Figure 2 ;

[0019] Figure 3 is Figure 1 a structural schematic diagram of the brake mechanism in the embodiment shown in the drawings

[0020] Figure 4 is Figure 2 an enlarged view of the A area in the embodiment shown in the drawings

[0021] The reference signs are explained as follows:

[0022] 1, car body; 11, storage plate; 12, frame; 13, stabilizing frame; 131, anti-collision strip; 14, shock absorber; 2, wheel assembly; 21, directional wheel; 211, first rotation shaft; 22, first wheel frame; 23, steering wheel; 231, third rotation shaft; 24, second wheel frame; 241, second rotation shaft; 3, handle; 31, rotation shaft; 32, grip part; 33, connecting part; 4, brake mechanism; 41, brake box; 42, brake rod; 43, elastic member; 44, traction member; 45, limiting member; 451, limiting hole; 46, limiting rod; 461, limiting block. DETAILED DESCRIPTION

[0023] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0024] In the description of the present application, it should be noted that the terms "front" and "back" with respect to direction are defined according to the normal direction of pushing the cart by a person, specifically, when the person faces the cart and normally pushes it, the advancing direction of the cart is "front", and the opposite direction is "back"; the terms "first", "second", and "third" are only for description purposes, and cannot be understood as indicating or implying relative importance. In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0025] With reference to the drawings Figures 1-4 The self-locking cart for semiconductor material transportation in the present embodiment includes a car body 1, at least one layer of storage plate 11 horizontally arranged in the car body 1 and used for placing semiconductor materials, a wheel assembly 2 arranged below the car body 1, and a handle 3 connected to the rear side of the car body 1. The wheel assembly 2 includes at least one directional wheel 21 rotationally connected to the bottom of the car body 1 about a first rotation shaft 211 arranged left and right. The self-locking cart further includes a brake mechanism 4 corresponding in number to the directional wheel 21 and used for limiting rotation of the directional wheel 21.

[0026] The handle 3 is rotationally connected to the car body 1 about a rotation shaft 31 arranged in the left-right direction, and the handle 3 has a grip part 32 located at the rear side of the rotation shaft 31 and a connecting part 33 located at the front side of the rotation shaft 31. The connecting part 33 has a first position and a second position above the first position by rotating the handle 3.

[0027] Each brake mechanism 4 comprises a brake box 41 fixed to the bottom of the vehicle body 1 and located above the corresponding directional wheel 21, a brake lever 42 slidingly arranged in the brake box 41, an elastic member 43 arranged in the brake box 41 and used to apply a downward force to the brake lever 42, a traction member 44 having two ends connected with the brake lever 42 and the connecting part 33 respectively and used to apply an upward force to the brake lever 42, specifically, the traction member 44 is arranged as a brake rope.

[0028] The brake mechanism 4 has at least two working states, when it is in the first working state, the connecting part 33 is located at the first position, the elastic member 43 is released, and the lower end of the brake lever 42 abuts against the directional wheel 21; when the brake mechanism 4 is in the second working state, the connecting part 33 is located at the second position, the elastic member 43 is compressed, and the brake lever 42 is away from the directional wheel 21 and the lower end of the brake lever 42 is separated from the directional wheel 21. When the production personnel does not operate the self-locking cart, the brake mechanism 4 is in the first working state, the brake lever 42 in the brake mechanism 4 will abut against the directional wheel 21 under the action of the force applied by the elastic member 43, and the rotation of the directional wheel 21 is limited by the friction force between the brake lever 42 and the directional wheel 21, so that the trolley is limited in place, avoiding the phenomenon of cart sliding; when the production personnel operates the self-locking cart, the personnel applies a pushing force to the grip part 32 of the handle 3, which will be decomposed into two forces in the forward and downward directions when acting on the handle 3, wherein the downward force drives the handle 3 to rotate, so that the connecting part 33 on the handle 3 rotates from the first position to the second position, then pulls the traction member 44, and drives the brake lever 42 through the traction member 44, so that the brake lever 42 is separated from the directional wheel 21, thereby releasing the limitation on the directional wheel 21; the forward force pushes the trolley forward, thereby simultaneously releasing the brake and pushing the trolley, by taking the handle 3 as the operating member and cooperating with the brake mechanism 4, the personnel can automatically release the brake when operating the trolley, and the trolley will automatically brake when the personnel releases it, without the need for additional brake operation, which not only simplifies the operation steps, improves the concentration and controllability of the personnel operating the trolley, but also avoids personnel mistakes and improves the operation efficiency; in addition, the brake is performed by the friction force between the brake lever and the directional wheel, so that there is a certain buffer between the deceleration and the stop of the trolley after starting the brake, avoiding the materials placed on the trolley from falling down under the action of inertia, avoiding unnecessary loss and reducing cost waste.

[0029] In a more preferable embodiment, the wheel assembly 2 further comprises a first wheel frame 22 corresponding in number and orientation to the directional wheels 21 and fixed to the bottom of the vehicle body 1, each directional wheel 21 being rotatably connected to the first wheel frame 22 about a first rotation axis 211. The orientation of the directional wheels 21 is achieved by the first wheel frame 22, which also facilitates the clearance of a braking distance between the braking mechanism 4 and the directional wheels 21, and facilitates the application or release of the braking force of the braking lever 42 to the directional wheels 21. Specifically, the directional wheels 21 and the first wheel frame 22 are each provided with at least one pair of corners located at the rear side of the bottom of the vehicle body 1, so as to improve the stability of the trolley during pushing.

[0030] In a more preferable embodiment, the wheel assembly 2 further comprises at least one steering wheel 23 arranged at the bottom of the vehicle body 1, a second wheel frame 24 corresponding in number to the steering wheels 23 and rotatably connected to the bottom of the vehicle body 1 about a second rotation axis 241 arranged vertically, and the steering wheels 23 are rotatably connected to the second wheel frame 24 about a third rotation axis 231 arranged horizontally. The steering function of the steering wheels 23 is achieved by the second wheel frame 24, which facilitates the steering of the trolley by the person operating the trolley. Specifically, the steering wheels 23 and the second wheel frame 24 are each provided with at least one pair of corners located at the front side of the bottom of the vehicle body 1, so as to improve the stability of the trolley during pushing.

[0031] In a more preferable embodiment, the vehicle body 1 comprises a frame 12, a stabilizing frame 13 arranged horizontally below the frame 12, at least four shock absorbers 14 connected between the frame 12 and the stabilizing frame 13, the wheel assembly 2 being connected to the bottom of the stabilizing frame 13, the braking box 41 being fixed in the stabilizing frame 13, and the storage plate 11 being arranged in the frame 12. By arranging the wheel assembly 2 and the storage plate 11 on the stabilizing frame 13 and the frame 12 respectively, and arranging the shock absorbers 14 between the stabilizing frame 13 and the frame 12, the shock absorption performance of the trolley is improved, and damage to the semiconductor materials such as chips and wafers placed on the storage plate during the pushing of the trolley is avoided.

[0032] In a more preferable embodiment, the outer walls at the corners of the stabilizing frame 13 are each provided with an anti-collision strip 131, which not only improves the shock absorption performance of the trolley when it collides with other objects, but also avoids damage to the trolley itself or the collided object.

[0033] In a more preferable embodiment, the elastic member 43 is a compression spring, the elastic member 43 is sleeved on the braking lever 42, and the two ends of the elastic member 43 are respectively in abutment with the braking lever 42 and the top of the braking box 41. The downward force of the compression spring is applied to the braking lever 42, so that the braking lever 42 restricts the rotation of the directional wheels 21.

[0034] In a more preferable embodiment, the lower end of the brake lever 42 is made of rubber material to increase the friction between the brake lever 42 and the directional wheel 21, thereby improving the braking effect.

[0035] In a more preferable embodiment, the brake mechanism 4 further comprises a limiting member 45 fixed to the vehicle body 1 and having a limiting hole 451 formed therein, and a limiting rod 46 inserted into the limiting hole 451 and having one end fixedly connected to the connecting portion 33, the limiting rod 46 having two limiting blocks 461, the portion of the limiting rod 46 inserted into the limiting hole 451 being located between the two limiting blocks 461, the diameter of the limiting hole 451 being larger than the diameter of the limiting rod 46, and the diameter of the limiting block 461 being larger than the diameter of the limiting hole 451. When the handle 3 is rotated under force, the limiting rod 46 is moved synchronously, and because the diameter of the limiting hole 451 is larger than the diameter of the limiting rod 46 but smaller than the diameter of the limiting block 461, when the handle 3 is rotated to the position where the limiting block 461 abuts against the limiting member 45, the handle 3 cannot be further rotated because the limiting block 461 cannot pass through the limiting hole 451, thereby limiting the rotation amplitude of the handle 3 and avoiding that the brake mechanism 4 is damaged due to excessive force applied by the person to the handle 3, and improving the use stability of the self-locking cart.

[0036] Thanks to the above technical scheme, the self-locking cart has the following advantages compared with the prior art:

[0037] The self-locking cart for semiconductor material transportation has simple structure and convenient operation, the handle is used as an operating member and cooperates with the brake mechanism, so that the brake can be automatically released when the person operates the cart, and the brake is automatically applied when the person releases the cart, without the need of additional brake operation, which not only simplifies the operation steps, improves the concentration and controllability of the person operating the cart, but also avoids the person's mistake and improves the transportation efficiency; in addition, the brake is applied through the friction between the brake lever and the directional wheel, so that the cart has a certain buffer from deceleration to stop after starting the brake, which avoids the materials placed on the cart from falling down due to inertia, avoids unnecessary loss, and reduces cost waste.

[0038] The above embodiments are only for illustrating the technical concept and characteristics of the self-locking cart, the purpose is to enable those skilled in the art to understand the content of the self-locking cart and implement it, and cannot limit the protection scope of the self-locking cart, any equivalent changes or modifications made according to the spirit and essence of the self-locking cart should be covered within the protection scope of the self-locking cart.

Claims

1. A self-locking trolley for transporting semiconductor materials, characterized in that: The trolley includes a body (1), at least one shelf (11) horizontally disposed in the body (1) for placing semiconductor materials, a wheel assembly (2) disposed below the body (1), and a handle (3) connected to the rear side of the body (1). The wheel assembly (2) includes at least one directional wheel (21) rotatably connected to the bottom of the body (1) about a first pivot (211) disposed to the left and right. The self-locking trolley also includes a braking mechanism (4) in number corresponding to the number of directional wheels (21) and used to limit the rotation of the directional wheels (21). The handle (3) is rotatably connected to the vehicle body (1) about a rotating shaft (31) arranged in the left-right direction, and the handle (3) has a grip portion (32) located behind the rotating shaft (31) and a connecting portion (33) located in front of the rotating shaft (31). The connecting portion (33) has a first position and a second position above the first position by rotating the handle (3). Each of the braking mechanisms (4) includes a brake box (41) fixed to the bottom of the vehicle body (1) and located above the corresponding directional wheel (21), a brake rod (42) slidably passing through the brake box (41), an elastic member (43) disposed in the brake box (41) and used to apply a downward force to the brake rod (42), and a traction member (44) whose two ends are respectively connected to the brake rod (42) and the connecting part (33) and used to apply an upward force to the brake rod (42). The braking mechanism (4) has at least two working states. When it is in the first working state, the connecting part (33) is in the first position, the elastic element (43) is released, and the lower end of the brake rod (42) is pressed against the directional wheel (21). When the braking mechanism (4) is in the second working state, the connecting part (33) is in the second position, the elastic element (43) is compressed, the brake rod (42) is away from the directional wheel (21), and the lower end of the brake rod (42) is disengaged from the directional wheel (21).

2. The self-locking trolley for semiconductor material handling according to claim 1, characterized in that: The wheel assembly (2) also includes a first wheel frame (22) corresponding to the number of directional wheels (21) and fixed to the bottom of the vehicle body (1), each of the directional wheels (21) being rotatably connected to the first wheel frame (22) about the first pivot (211).

3. The self-locking trolley for semiconductor material handling according to claim 1, characterized in that: The wheel assembly (2) further includes at least one steering wheel (23) disposed at the bottom of the vehicle body (1) and a second wheel frame (24) corresponding to the number of steering wheels (23) and rotatably connected to the bottom of the vehicle body (1) about a vertically arranged second pivot (241). The steering wheel (23) is rotatably connected to the second wheel frame (24) about a horizontally arranged third pivot (231).

4. The self-locking trolley for semiconductor material handling according to claim 1, characterized in that: The vehicle body (1) includes a frame (12), a stabilizing frame (13) horizontally disposed below the frame (12), and at least four shock absorbers (14) connected between the frame (12) and the stabilizing frame (13). The at least four shock absorbers (14) are respectively located at the corners of the stabilizing frame (13). The wheel assembly (2) is connected to the bottom of the stabilizing frame (13). The brake box (41) is fixed in the stabilizing frame (13). The storage plate (11) is disposed in the frame (12).

5. The self-locking trolley for semiconductor material handling according to claim 4, characterized in that: The outer wall of the corner of the stabilizing frame (13) is provided with anti-collision strips (131).

6. The self-locking trolley for semiconductor material handling according to claim 1, characterized in that: The elastic element (43) is configured as a compression spring. The elastic element (43) is sleeved on the brake rod (42), and the two ends of the elastic element (43) abut against the top of the brake rod (42) and the brake box (41) respectively.

7. The self-locking trolley for semiconductor material handling according to claim 1, characterized in that: The lower end of the brake lever (42) is made of rubber.

8. The self-locking trolley for semiconductor material handling according to claim 1, characterized in that: The braking mechanism (4) further includes a limiting member (45) fixed to the vehicle body (1) and having a limiting hole (451) thereon, and a limiting rod (46) inserted into the limiting hole (451) and fixedly connected at one end to the connecting part (33). The limiting rod (46) has two limiting blocks (461). The part where the limiting rod (46) is inserted into the limiting hole (451) is located between the two limiting blocks (461). The diameter of the limiting hole (451) is larger than the diameter of the limiting rod (46), and the diameter of the limiting block (461) is larger than the diameter of the limiting hole (451).

Images