A supplementary wheel support assembly

Abstract

The utility model relates to raw material stirring technical field discloses an auxiliary wheel support subassembly, including fixed bolster, the top fixed connection of fixed bolster has motor fixed plate, the top installation of motor fixed plate has motor, the outside of fixed bolster is provided with guide hole, the drive end fixed connection of motor has screw rod, the other end of screw rod is fixedly connected in the one side of fixed bolster through bearing, the outside screw thread connection of screw rod has fixed block, the outside of fixed block with the guide hole of fixed bolster is the sliding fit, the wheel support of fixed block is connected with through clamping groove. In the utility model, through the double cooperation of screw rod drive and fixed bolster guide hole, the high accuracy linear motion of fixed block is realized, effectively avoid the rotation deviation problem in traditional structure, and the sliding fit of wheel support and fixed bolster inner wall forms double guide mechanism.

Description

Technical Field

[0001] This utility model relates to the field of raw material mixing technology, and in particular to an auxiliary wheel support assembly. Background Technology

[0002] Auxiliary wheel support components are key functional modules for mobile equipment (such as automated guided vehicles, handling robots, medical mobile platforms, and heavy logistics equipment). They are mainly used to provide reliable auxiliary support when the equipment is stationary, under changing loads, or on uneven ground, preventing the equipment from tilting or sliding due to a shift in the center of gravity, and ensuring operational safety and stability.

[0003] Existing auxiliary wheel support assemblies mostly adopt a design scheme of single motor drive combined with a simple guide structure. The typical structure includes components such as drive motor, transmission screw, sliding bracket and support wheel. The motor drives the screw to rotate to realize the lifting and lowering movement of the support wheel. This type of structure usually relies on a single guide groove or slide rail to constrain the moving parts and uses mechanical limit devices to control the stroke range.

[0004] Single-guide structure is difficult to effectively constrain the rotational freedom of moving parts, which can easily cause the support wheel to wobble during movement, affecting positioning accuracy. Secondly, traditional sliding fit has high frictional resistance, which not only affects the smoothness of movement, but also accelerates the wear of parts. Therefore, an auxiliary wheel support assembly is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an auxiliary wheel support assembly, which aims to improve the problem that the single guide structure in the prior art is difficult to effectively constrain the rotational degree of freedom of moving parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An auxiliary wheel support assembly includes a fixed bracket, a motor mounting plate fixedly connected to the top of the fixed bracket, a motor mounted on the top of the motor mounting plate, a guide hole provided on the outside of the fixed bracket, a lead screw fixedly connected to the drive end of the motor, the other end of the lead screw fixedly connected to one side of the fixed bracket via a bearing, a fixing block threadedly connected to the outside of the lead screw, the outside of the fixing block slidingly engaging with the guide hole of the fixed bracket, a wheel bracket connected to the fixing block via a slot, the two sides of the wheel bracket slidably connected to the inner wall of the fixed bracket, casters mounted on the bottom of the wheel bracket, a limit switch mounting plate provided on the outside of the fixed bracket, an upper limit switch mounted on the outside of the limit switch mounting plate, and a lower limit switch mounted on the outside of the limit switch mounting plate.

[0008] As a further description of the above technical solution:

[0009] The threaded inner hole of the fixed block forms a helical drive with the lead screw, and the outer surface of the fixed block has a multi-deformation structure that cooperates with the guide hole;

[0010] As a further description of the above technical solution:

[0011] The wheel bracket is detachably connected to the fixing block by screws;

[0012] As a further description of the above technical solution:

[0013] The upper limit switch and the lower limit switch are contact micro switches or electrical sensors;

[0014] As a further description of the above technical solution:

[0015] A self-lubricating bushing is provided inside the guide hole of the fixed bracket.

[0016] This utility model has the following beneficial effects:

[0017] In this invention, the high-precision linear motion of the fixed block is achieved through the dual cooperation of the lead screw drive and the guide hole of the fixed bracket, effectively avoiding the rotational deviation problem in the traditional structure. The sliding cooperation between the wheel bracket and the inner wall of the fixed bracket forms a dual guiding mechanism, which significantly enhances the rigidity and motion stability of the overall structure. The use of self-lubricating bushings reduces frictional resistance, making the lifting action smoother and more reliable. Combined with the precise control of the upper and lower limit switches, it ensures that the casters can accurately stop at the set position. This design not only improves the positioning accuracy and service life of the support components, but also maintains the stability of the equipment's walking direction when the casters touch the ground. It is particularly suitable for automated equipment with high motion precision requirements. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of an auxiliary wheel support assembly proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the lower limit switch of an auxiliary wheel support assembly proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the fixing block of an auxiliary wheel support assembly proposed in this utility model.

[0021] Legend:

[0022] 1. Fixed bracket; 2. Motor mounting plate; 3. Motor; 4. Wheel bracket; 5. Limit switch mounting plate; 6. Upper limit switch; 7. Lower limit switch; 8. Fixing block; 9. Casters. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1 to 3 This utility model provides an embodiment of an auxiliary wheel support assembly, including a fixed bracket 1 for providing overall structural support and guidance. A motor fixing plate 2 is fixedly connected to the top of the fixed bracket 1 to ensure the stability and accuracy of the motor 3 installation. The motor 3 is installed on the top of the motor fixing plate 2 as a power source to drive the lead screw to rotate. A guide hole is provided on the outside of the fixed bracket 1 to provide a linear motion track for the fixed block 8. A self-lubricating liner is provided in the guide hole of the fixed bracket 1 to reduce frictional resistance and improve the smoothness of movement.

[0025] A lead screw is fixedly connected to the drive end of motor 3, which converts rotational motion into linear motion. The other end of the lead screw is fixedly connected to one side of fixed bracket 1 through a bearing to ensure the concentricity and stability of the lead screw during rotation. A fixed block 8 is threadedly connected to the external end of the lead screw, which converts the rotational motion of the lead screw into its own linear motion. The external end of the fixed block 8 is in sliding fit with the guide hole of fixed bracket 1 to ensure the linearity and stability of the motion trajectory. A wheel bracket 4 is connected to the fixed block 8 through a slot to realize quick disassembly and maintenance. The two sides of the wheel bracket 4 are slidably connected to the inner wall of fixed bracket 1 to provide auxiliary guidance and enhance structural rigidity.

[0026] Casters 9 are installed at the bottom of the wheel bracket 4, directly contacting the ground for support. A limit switch mounting plate 5 is installed on the outside of the fixed bracket 1, providing an installation reference for the limit switches. An upper limit switch 6 is installed on the outside of the limit switch mounting plate 5 to control the maximum upward position of the casters 9. A lower limit switch 7 is installed on the outside of the limit switch mounting plate 5 to control the maximum downward position of the casters 9. The threaded inner hole of the fixing block 8 forms a helical drive with the lead screw, achieving precise displacement control. The outer surface of the fixing block 8 has a multi-deformation structure that mates with the guide hole to prevent rotation and ensure purely linear motion. The wheel bracket 4 is detachably connected to the fixing block 8 via screws, facilitating maintenance and component replacement. The upper limit switch 6 and lower limit switch 7 are contact microswitches or electrical sensors, providing reliable position detection and signal feedback.

[0027] Working principle: The motor 3 drives the lead screw to rotate, and the lead screw and the threaded inner hole of the fixed block 8 form a helical transmission, which converts the rotational motion of the motor 3 into the linear motion of the fixed block 8. The outer surface of the fixed block 8 slides with the guide hole of the fixed bracket 1 to ensure that it moves smoothly along the predetermined trajectory and avoids rotational deviation. The wheel bracket 4 is connected to the fixed block 8 through the slot and screw, and slides along the inner wall of the fixed bracket 1 to provide dual guidance and enhance the structural rigidity and motion stability.

[0028] The caster 9 is installed at the bottom of the wheel bracket 4 and supports or retracts with the lifting and lowering of the fixed block 8. The upper limit switch 6 and the lower limit switch 7 detect the travel limit of the fixed block 8 respectively. When triggered, the motor 3 is stopped to ensure that the caster 9 is accurately stopped in the set position. The self-lubricating liner reduces the friction of the guide hole and makes the movement smoother. The overall structure ensures that the caster 9 remains stable when it touches the ground through the screw drive and the double guide design, without affecting the walking direction of the equipment.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An auxiliary wheel support assembly, comprising a fixed bracket (1), characterized in that: A motor mounting plate (2) is fixedly connected to the top of the fixed bracket (1), and a motor (3) is installed on the top of the motor mounting plate (2). A guide hole is provided on the outside of the fixed bracket (1). A lead screw is fixedly connected to the drive end of the motor (3). The other end of the lead screw is fixedly connected to one side of the fixed bracket (1) through a bearing. A fixing block (8) is threadedly connected to the outside of the lead screw. The outside of the fixing block (8) is slidably fitted with the guide hole of the fixed bracket (1). A wheel bracket (4) is connected to the fixing block (8) through a slot. The two sides of the wheel bracket (4) are slidably connected to the inner wall of the fixed bracket (1). A caster (9) is installed at the bottom of the wheel bracket (4). A limit switch mounting plate (5) is provided on the outside of the fixed bracket (1). An upper limit switch (6) is installed on the outside of the limit switch mounting plate (5). A lower limit switch (7) is installed on the outside of the limit switch mounting plate (5).

2. The auxiliary wheel support assembly according to claim 1, characterized in that: The threaded inner hole of the fixed block (8) forms a helical drive with the lead screw, and the outer surface of the fixed block (8) is a multi-deformation structure that cooperates with the guide hole.

3. The auxiliary wheel support assembly according to claim 1, characterized in that: The wheel bracket (4) is detachably connected to the fixing block (8) by screws.

4. The auxiliary wheel support assembly according to claim 1, characterized in that: The upper limit switch (6) and the lower limit switch (7) are contact micro switches or electrical sensors.

5. An auxiliary wheel support assembly according to claim 1, characterized in that: A self-lubricating bushing is provided in the guide hole of the fixed bracket (1).

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