Steel ball press-fitting device for assembling trolley trundles

Abstract

The invention discloses a steel ball press-fitting device for trolley trundle assembly in the technical field of trundle assembly, which comprises a processing table, and further comprises a support frame which is in sliding connection with the processing table in the vertical direction and can support and position a wheel yoke; the position of the top cover can be corrected through the combined action of the multiple correction blocks; the steel ball feeding machine is arranged on one side of the top of the machining table and can move in a self-driven mode and feed steel balls to the inner sides of the wheel yoke and the top cover. The bottom cover press-fitting assembly is arranged above the machining table and used for press-fitting a bottom cover on the wheel yoke; through the arrangement of the supporting frame, the correcting block and the bottom cover press-fitting assembly, the wheel yoke and the top cover can be installed at the same time, and the steel ball feeding machine can install the bottom cover while placing steel balls; the wheel yoke, the top cover and the bottom cover can be automatically positioned in the assembling process, and it can be guaranteed that the assembled wheel yoke, the assembled top cover and the assembled bottom cover are in a coaxial state.

Description

Technical Field

[0001] The invention relates to the technical field of caster assembly, in particular to a steel ball press-fitting device for assembling casters of a trolley. Background Art

[0002] Since the universal caster has balls installed on the inner side of the bracket, its structure allows 360-degree rotation. The existing universal caster bracket is usually assembled manually, and multiple workstations need to coordinate the work. The worker first places the roller on the inner side of the wheel yoke and then buckles the bottom cover. At the same time, the worker places the ball on the inner side of the top cover of the caster bracket, and then assembles the wheel yoke with the ball and the bottom cover and the top cover with the ball, and then fixes the wheel yoke, the bottom cover, the top cover and the ball by rivets. Manual operation is inefficient, and in the process of transferring the wheel yoke with the ball and the bottom cover to the next workstation, the ball on the inner side of the wheel yoke and the bottom cover are prone to offset due to shaking, and deviations are prone to occur with the top cover during assembly. The coaxiality between the wheel yoke, the bottom cover and the top cover is difficult to ensure, and the caster bracket is prone to deformation and damage due to uneven force during use.

[0003] Based on this, the present invention designs a steel ball pressing device for assembling wheel of a trolley to solve the above problems. Summary of the invention

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel ball pressing device for assembling trolley casters, comprising a processing table, and also comprising: a support frame, which is slidably connected to the processing table in the vertical direction and can support and position the wheel yoke; a plurality of correction blocks, which are distributed in a circular array about the center of the support frame, and the plurality of correction blocks work together to correct the position of the top cover; a steel ball feeder, which is arranged on one side of the top of the processing table and can move self-driven and feed steel balls to the wheel yoke and the inner side of the top cover; a bottom cover pressing assembly, which is arranged above the processing table and is used to press the bottom cover onto the wheel yoke.

[0005] As a further solution of the present invention, the support frame includes: a support plate, which is arranged to have an arc shape matching the circular end face of the wheel yoke and is slidably connected to the processing table in the vertical direction; a first spring for its reset is fixedly connected to the support plate; a baffle, which is rotatably mounted on the end of the arc-shaped support plate and is used to fix the wheel yoke, and a torsion spring is installed on the rotating shaft of the baffle.

[0006] As a further solution of the present invention, the bottom cover pressing assembly includes: a support rod, a tubular structure with an opening at the top end; a pressing block, a plurality of which are distributed in a circular array about the support rod and are all slidably connected to the support rod in the horizontal direction; a positioning rod, a plurality of which are distributed in a circular array about the support rod and are all slidably connected to the support rod in the vertical direction, and the positioning rod can fix the bottom cover; a connecting rod, which is set to the same number as the pressing block and the positioning rod; the two ends of the connecting rod are respectively hinged to the pressing block and the positioning rod; an insertion rod, which is fixed to the top of the support rod and can be plugged into a socket opened on the support plate; a linear drive mechanism for driving the support rod to move in the vertical direction.

[0007] As a further solution of the present invention, a suction cup is fixedly connected to the bottom end of the positioning rod, and a plurality of the positioning rods are commonly fixedly connected to a fixed plate, an air intake pipe is fixedly connected to the fixed plate, and a valve core is arranged in the air intake pipe; a pressure pump is arranged in the positioning rod; the positioning rod and the fixed plate are both arranged as hollow structures; when the fixed plate moves upward, the pressure pump can be connected to the air intake pipe, and when the pressure pump is working, the suction cup can fix the bottom cover.

[0008] As a further solution of the present invention, the linear drive mechanism includes a cylinder; the output end of the cylinder is fixedly connected to the support rod, and the fixed end is fixedly connected to the processing table.

[0009] As a further solution of the present invention, a wedge-shaped block capable of limiting the support plate is slidably installed on the processing table, and a second spring for resetting the wedge-shaped block is fixedly connected to the wedge-shaped block; a traction rope is fixedly connected to the wedge-shaped block, and a slider is fixedly connected to one end of the traction rope away from the wedge-shaped block, and the slider is located above the support rod and can be driven to move by the support rod.

[0010] As a further solution of the present invention, the correction block is elastically slidably connected to the processing table, and the correction block is connected to a wedge-shaped push block through an elastic telescopic rod, and the wedge-shaped push block is located below the support rod.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention arranges the support frame, the correction block and the bottom cover pressing assembly, so that the wheel yoke and the top cover can be installed at the same time, and the steel ball feeding machine can install the bottom cover while placing the steel balls; the installation of the wheel yoke, the top cover and the bottom cover are simple and easy to operate; the wheel yoke, the top cover and the bottom cover can be automatically adjusted during the assembly process, which can ensure that the wheel yoke, the top cover and the bottom cover are in a coaxial state after the assembly is completed, and can greatly improve the production efficiency and quality of the caster bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the support frame and wedge-shaped block structure of the present invention;

[0015] Figure 3 It is a cross-sectional schematic diagram of the structure of the bottom cover press-fit assembly of the present invention;

[0016] Figure 4 This is a partial structural schematic diagram of the bottom cover press-fit assembly of the present invention;

[0017] Figure 5 It is a cross-sectional schematic diagram of the correction block, the elastic telescopic cylinder and the wedge-shaped push block structure of the present invention;

[0018] Figure 6 for Figure 5 A partial enlarged view of the middle part;

[0019] Figure 7 It is a cross-sectional schematic diagram of the assembly state of the wheel yoke, bottom cover and top cover of the present invention.

[0020] In the accompanying drawings: 1-processing table, 2-support frame, 3-correction block, 4-steel ball feeding machine, 5-bottom cover pressing assembly, 6-support plate, 7-baffle, 8-support rod, 9-pressing block, 10-positioning rod, 11-connecting rod, 12-suction cup, 13-fixed plate, 14-intake pipe, 15-valve core, 16-pressure pump, 17-cylinder, 18-wedge block, 19-traction rope, 20-slider, 21-elastic telescopic rod, 22-wedge push block 22, 23-insertion rod, 24-jack. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 7 The present invention provides a technical solution: a steel ball pressing device for assembling a wheelbarrow caster, comprising a processing table 1, a support frame 2, a plurality of correction blocks 3, a steel ball feeder 4 and a bottom cover pressing assembly 5; the support frame 2 is slidably connected to the processing table 1 in the vertical direction and can support and position the wheel yoke; the plurality of correction blocks 3 are distributed in a circular array about the center of the support frame 2, and the plurality of correction blocks 3 work together to correct the position of the top cover; the steel ball feeder 4 is arranged on one side of the top of the processing table 1 and can move self-driven and feed steel balls to the wheel yoke and the inner side of the top cover; the bottom cover pressing assembly 5 is arranged above the processing table 1 and is used to press the bottom cover onto the wheel yoke.

[0023] Specifically, Figure 1 and Figure 2 As shown, the support frame 2 includes a support plate 6 and a baffle 7; the support plate 6 is set to an arc shape matching the circular end face of the wheel yoke and is slidably connected to the processing table 1 in the vertical direction; a first spring for its reset is fixedly connected to the support plate 6; the baffle 7 is rotatably installed at the end of the arc-shaped support plate 6 and is used to fix the wheel yoke, and a torsion spring is installed on the rotating shaft of the baffle 7.

[0024] Specifically, Figure 3 and Figure 4 As shown, the bottom cover pressing assembly 5 includes a support rod 8, a pressing block 9, a positioning rod 10, a connecting rod 11, an insertion rod 23 and a linear drive mechanism; the support rod 8 is provided with a tubular structure with an opening at the top end; the pressing block 9 is provided with a plurality of rods distributed in a circular array about the support rod 8 and all of them are slidably connected with the support rod 8 in the horizontal direction; the positioning rod 10 is provided with a plurality of rods distributed in a circular array about the support rod 8 and all of them are slidably connected with the support rod 8 in the vertical direction, and the positioning rod 10 can fix the bottom cover; the connecting rod 11 is provided with the same number as the pressing block 9 and the positioning rod 10; the two ends of the connecting rod 11 are respectively hinged with the pressing block 9 and the positioning rod 10; the insertion rod 23 is fixedly connected to the top of the support rod, and can be plugged into the socket 24 opened on the support plate 6; the linear drive mechanism is used to drive the support rod 8 to move in the vertical direction.

[0025] Specifically, Figure 3 and Figure 4 As shown, a suction cup 12 is fixedly connected to the bottom end of the positioning rod 10, and multiple positioning rods 10 are commonly fixedly connected to a fixing plate 13, to which an air intake pipe 14 is fixedly connected, and a valve core 15 is arranged in the air intake pipe 14; a pressure pump is arranged in the positioning rod 10; the positioning rod 10 and the fixing plate 13 are both arranged as hollow structures; when the fixing plate 13 moves upward, the pressure pump can be connected to the air intake pipe 14, and when the pressure pump is working, the suction cup 12 can fix the bottom cover.

[0026] Specifically, Figure 4 As shown, the linear drive mechanism includes a cylinder 17 ; the output end of the cylinder 17 is fixedly connected to the support rod 8 , and the fixed end is fixedly connected to the processing table 1 .

[0027] Specifically, Figure 1 and Figure 2 As shown, a wedge-shaped block 18 capable of limiting the support plate 6 is slidably installed on the processing table 1, and a second spring for resetting the wedge-shaped block 18 is fixedly connected to the wedge-shaped block 18; a traction rope 19 is fixedly connected to the wedge-shaped block 18, and a slider 20 is fixedly connected to the end of the traction rope 19 away from the wedge-shaped block 18, and the slider 20 is located above the support rod 8 and can be driven to move by the support rod 8.

[0028] Specifically, Figure 5and Figure 6 As shown, the correction block 3 is elastically slidably connected to the processing table 1 , and the correction block 3 is connected to a wedge-shaped push block 22 via an elastic telescopic rod 21 , and the wedge-shaped push block 22 is located below the support rod 8 .

[0029] Working principle: The staff first places the top cover on the top of the processing table 1, and multiple correction blocks 3 need to be located inside the inner circle of the top cover; then the wheel yoke is vertically buckled into the support frame 2, such as Figure 2 and Figure 5 As shown, the arc surface of the wheel yoke fits with the arc surface of the support plate 6, and the vertical plane of the wheel yoke can squeeze the top of the baffle 7, which has an inclined surface, so that the baffle 7 opens outward. After the wheel yoke is installed in place, the baffle 7 will cooperate with the arc surface of the support plate to support and position the wheel yoke under the elastic force of the torsion spring. At this time, there is a small distance between the wheel yoke and the top cover; then the steel column feeder 4 can start working, and the steel ball feeder 4 will first move to the right as shown in FIG. Figure 5 The position shown in the figure, at this time, the two discharge pipes of the steel ball feeding machine 4 are respectively located on the sides of the wheel yoke and the top cover steel column placement groove, and the steel ball feeding machine 4 will feed the steel balls into the wheel yoke and the top cover steel column placement groove; in the process of feeding the steel balls, the staff will align the circular hole in the middle of the bottom cover with the bottom end of the support rod 8, and then lift the bottom cover upward. The diameter of the support rod 8 is much larger than the circular hole in the middle of the bottom cover, and it is easy to insert the bottom cover from the bottom end of the support rod 8; when the bottom cover moves to contact with the positioning rod 10, it will drive the positioning rod 10 to move upward synchronously, and the positioning rod 10 will drive the fixed plate 13 and the top end of the connecting rod 11 to move upward synchronously; as shown in the figure ... end of the connecting rod 11 to move upward synchronous Figure 3 and Figure 4As shown, the bottom end of the connecting rod 11 will drive the pressure block 9 to move toward the outside of the support rod 8; multiple pressure blocks 9 will move outward synchronously, and when multiple pressure blocks 9 all move to contact the circular hole in the middle of the bottom cover, multiple pressure blocks 9 cooperate to correct the position of the bottom cover, and at this time the circular hole in the middle of the bottom cover and the support rod 8 are in a coaxial state; when the fixed plate 13 moves upward, it will drive the intake pipe 14 to move upward synchronously. After the pressure block 9 completes the correction of the bottom cover position, the valve core 15 will dock with the pressure pump, and the bottom cover moves to a fixed position; then the pressure pump can extract the air in the fixed plate 13, the positioning rod 10 and the suction cup 12 through the intake pipe 14, and multiple suction cups 12 can cooperate to adsorb the corrected bottom cover; after the steel column is placed, the steel ball feeder 4 moves to the left to the initial position, and then the cylinder 17 drives the support rod 8 to drive the bottom cover to move downward synchronously, and the support rod 8 It will drive the insertion rod 23 to move synchronously. After the insertion rod 23 is plugged into the socket 24, the support rod 8 and the support plate 6 are in a coaxial state. At this time, the bottom cover and the wheel yoke will also be in a coaxial state accordingly; after the bottom cover is buckled to the inner side of the wheel yoke, the bottom cover will drive the wheel yoke to move downward synchronously; when the bottom end of the support rod 8 moves downward and contacts with the wedge-shaped push rod 22, it will drive the wedge-shaped push rod 22 to move outward through the inclined surface; the wedge-shaped push block 22 and the correction block 3 are both distributed in a circular array about the center of the support plate 6; therefore, when the support rod 8 drives the wedge-shaped push block 22 to move outward, the wedge-shaped push block 22 can drive the correction block 3 to move outward synchronously through the elastic telescopic rod 21, and the correction block 3 will move to the outer side after it contacts with the outer circumferential surface of the top cover to correct the position of the top cover; then the bottom cover, the wheel yoke can be assembled with the top cover, and then the riveting work can be carried out; it should be noted that if Figure 1 and Figure 2 As shown, after the bottom cover drives the wheel yoke and the support frame 2 to move downward to dock with the top cover, the support plate 6 moves downward to the bottom of the wedge-shaped block 18, and the wedge-shaped block 18 will limit the support plate 6 at this time. After the bottom cover, the wheel yoke and the top cover are assembled, they can be in a static state; then the pressure pump 16 injects air into the air intake pipe 14, so that the suction cup 12 cancels the fixation of the bottom cover, and the cylinder 17 can drive the support rod 8 to move upward and return to the initial position; during the upward movement of the support rod 8, as shown in FIG. Figure 5 As shown, the automatic riveting equipment located under the processing table 1 can inject rivets into the middle of the top cover, the wheel yoke and the bottom cover, and then fix the top cover, the wheel yoke and the bottom cover together through rivets to complete the assembly of the caster bracket; Figure 1 As shown, the support rod 8 moves upward to the initial position by driving the slider 20, and the slider 20 can drive the wedge block 18 to move outward through the traction rope 19 to cancel the limit on the support plate 6, and then the support frame 2 can move upward to the initial position as shown. Figure 1The initial position shown in the figure, and then the staff can take out the assembled caster bracket to the outside; the present invention arranges the support frame 2, the correction block 3 and the bottom cover pressing assembly, the wheel yoke and the top cover can be installed at the same time, and the steel ball feeder 4 can install the bottom cover while placing the steel balls; the installation of the wheel yoke, the top cover and the bottom cover is simple and easy to operate; the wheel yoke, the top cover and the bottom cover can be automatically adjusted during the assembly process, which can ensure that the wheel yoke, the top cover and the bottom cover are in a coaxial state after assembly, and can greatly improve the production efficiency and quality of the caster bracket.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel ball press-fitting device for assembling a wheelbarrow caster, comprising a processing table (1), characterized in that: Also includes: A support frame (2) is slidably connected to the processing table (1) in the vertical direction and is capable of supporting and positioning the wheel yoke; A plurality of correction blocks (3) are distributed in a circular array about the center of the support frame (2), and the plurality of correction blocks (3) can correct the position of the top cover by working together; A steel ball feeder (4) is arranged on one side of the top of the processing table (1) and is capable of self-propelled movement and feeding steel balls to the inner side of the wheel yoke and the top cover; A bottom cover pressing assembly (5) is arranged above the processing table (1) and is used for pressing the bottom cover onto the wheel yoke.

2. A steel ball press-fitting device for assembling a wheelbarrow caster according to claim 1, characterized in that: The support frame (2) comprises: The support plate (6) is arranged in an arc shape matching the circular end surface of the wheel yoke and is slidably connected to the processing table (1) in the vertical direction; a first spring for resetting the support plate (6) is fixedly connected to the support plate (6); The baffle plate (7) is rotatably mounted on the end of the arc-shaped support plate (6) and is used to fix the wheel yoke. A torsion spring is mounted on the rotating shaft of the baffle plate (7).

3. The steel ball press-fitting device for assembling a wheelbarrow caster according to claim 1, characterized in that: The bottom cover press-fit assembly (5) comprises: The support rod (8) is a tubular structure with an opening at the top; A plurality of pressing blocks (9) are arranged in a circular array about the support rod (8) and are all slidably connected to the support rod (8) in a horizontal direction; A plurality of positioning rods (10) are arranged in a circular array with respect to the support rod (8) and are all slidably connected to the support rod (8) in a vertical direction, and the positioning rods (10) are capable of fixing the bottom cover; The connecting rod (11) is arranged to have the same number as the pressing block (9) and the positioning rod (10); the two ends of the connecting rod (11) are respectively hinged to the pressing block (9) and the positioning rod (10); An inserting rod (23) is fixedly connected to the top of the supporting rod and can be inserted into a plug hole (24) provided on the supporting plate (6); The linear drive mechanism is used to drive the support rod (8) to move in the vertical direction.

4. The steel ball press-fitting device for assembling a wheelbarrow caster according to claim 3, characterized in that: A suction cup (12) is fixedly connected to the bottom end of the positioning rod (10); a plurality of the positioning rods (10) are commonly fixedly connected to a fixing plate (13); an air intake pipe (14) is fixedly connected to the fixing plate (13); a valve core (15) is arranged in the air intake pipe (14); a pressure pump is arranged in the positioning rod (10); the positioning rod (10) and the fixing plate (13) are both arranged as hollow structures; when the fixing plate (13) moves upward, the pressure pump can be connected to the air intake pipe (14); when the pressure pump is working, the suction cup (12) can fix the bottom cover.

5. The steel ball press-fitting device for assembling a wheelbarrow caster according to claim 3, characterized in that: The linear drive mechanism comprises a cylinder (17); the output end of the cylinder (17) is fixedly connected to the support rod (8), and the fixed end is fixedly connected to the processing table (1).

6. The steel ball press-fitting device for assembling a wheelbarrow caster according to claim 3, characterized in that: A wedge-shaped clamping block (18) capable of limiting the position of the support plate (6) is slidably mounted on the processing table (1), and a second spring for resetting the wedge-shaped clamping block (18) is fixedly connected to the wedge-shaped clamping block (18); a traction rope (19) is fixedly connected to the wedge-shaped clamping block (18), and a slider (20) is fixedly connected to one end of the traction rope (19) away from the wedge-shaped clamping block (18); the slider (20) is located above the support rod (8) and can be driven to move by the support rod (8).

7. The steel ball press-fitting device for assembling a wheelbarrow caster according to claim 3, characterized in that: The correction block (3) is elastically slidably connected to the processing table (1); the correction block (3) is connected to a wedge-shaped push block (22) via an elastic telescopic rod (21); and the wedge-shaped push block (22) is located below the support rod (8).

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