Variable-pitch sliding table

Abstract

The invention discloses a variable-pitch sliding table, and relates to the technical field of sliding tables, the variable-pitch sliding table comprises a base used for providing supporting force and a rotating rod connected with the base, and further comprises a pitch adjusting mechanism arranged on the base and used for changing a gap and a connecting mechanism used for moving a workpiece, and an extrusion block is arranged in the extrusion groove. In the using process of the variable-pitch sliding table, an existing screw rod with a fixed screw pitch is changed into the screw rod with the variable screw pitch, so that when the device is started and braked, the screw pitches are changed into different gaps, starting is facilitated during starting, the effect of assisting in speed reduction at the tail end can be achieved, and in the using process, the screw rod with the variable screw pitch can be replaced by the screw rod with the variable screw pitch. The variable screw pitch strip can be continuously oiled, so that the friction coefficient between the variable screw pitch strip and the guide ball is maintained in a relatively proper range, and the situation that the service life of the sliding table is shortened due to additional abrasion of the guide ball caused by the overlarge friction coefficient is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of sliding tables, and in particular to a variable pitch sliding table. Background Art

[0002] A linear sliding table is a mechanical structure that can provide linear motion. It can be used horizontally or vertically, or can be combined into a specific motion mechanism - that is, the multi-axis motion mechanisms such as XY axis and XYZ axis commonly referred to in the automation industry. The linear sliding table is usually used in conjunction with a power motor. By installing other required workpieces on its slider to form a complete conveying motion device and setting a suitable program for the forward and reverse rotation of the motor, the workpiece can be made to move automatically in a cyclic manner. Thus, the purpose of large-scale production and intensive production of the equipment can be achieved.

[0003] The moving speed of the existing linear sliding table is controlled by both the power motor and the screw rod at the same time. For example, the faster the rotation speed of the power motor, the faster the rotation speed of the screw rod will be driven, so that the moving speed of the sliding seat on the linear sliding table will be faster. At the same time, there is also the thread angle of the screw rod. The larger the angle of the screw rod, at this time, within the same number of turns of the screw rod, the moving distance of the sliding table will be greater, which can be understood as the speed will also change in disguise. However, during normal use, the screw pitch of the sliding table cannot be changed. And at the start and end stops, the actual requirements for the screw rod are different. At the start, the screw pitch at the initial stage should be relatively less dense, so as to reduce the starting resistance. And at the end, at this time, the screw pitch should be relatively smaller, so as to play an auxiliary braking role. The existing screw rod cannot automatically adjust the screw pitch at the initial end and the end according to the requirements, resulting in relatively inconvenient use during the process. Summary of the Invention

[0004] The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solution is too single. The embodiment of the present invention provides a variable pitch sliding table to solve the technical problem that during the use of the existing sliding table, the required screw clearances at the initial stage and the end of the screw rod are different, and the existing screw clearances cannot be changed, resulting in inconvenient use.

[0005] The embodiment of the present invention adopts the following technical solution: A variable pitch sliding table includes a base for providing support force and a rotating rod connected to the base, and further includes a pitch adjusting mechanism provided on the base for changing the clearance, and a connecting mechanism for moving the workpiece. An extrusion groove is provided on the base, and an extrusion block is provided in the extrusion groove.

[0006] Furthermore, the spacing adjustment mechanism is arranged at both ends of the rotating rod. Each spacing adjustment mechanism includes a fixed extrusion seat and a matching fixed sleeve. An inlet liquid collar is arranged outside the matching fixed sleeve. The inlet liquid collar is connected to the extrusion groove through a connecting pipe. The fixed extrusion seat is hollow. A fixed movable seat can be arranged on the fixed extrusion seat. A limiting ring is arranged at the end of the movable seat. An adjusting ring is arranged beside the limiting ring. The adjusting ring and the limiting ring are connected through a guiding pipe. The inlet liquid collar penetrates through the movable base and is communicated with the fixed extrusion seat through a communicating pipe.

[0007] Furthermore, the end of the rotating rod is connected to the driving motor. A variable pitch strip is arranged outside the connecting rod. A guiding groove is opened on the variable pitch strip. Both ends of the variable pitch strip are respectively connected to the corresponding adjusting rings. The middle section of the variable pitch strip is connected to the rotating rod.

[0008] Furthermore, the rotating rod is thick in the middle and thin at both ends. Both ends of the variable pitch strip are made of a plastic deformable material, such as elastic steel.

[0009] Furthermore, the connecting mechanism includes a mounting seat. A pressing matching plate is arranged through the mounting seat. The cross section of the pressing matching plate is U-shaped, and the pressing matching plate is used in cooperation with the extrusion block. A supplementary oil component is arranged in the pressing matching plate.

[0010] Furthermore, the supplementary oil component includes a connecting sleeve. The connecting sleeve is arranged in the mounting seat. A guiding sleeve is arranged on the inner surface of the connecting sleeve. The guiding sleeve is hollow. A pressed plate is arranged in the guiding sleeve. The pressed plate and the connecting sleeve are connected through a return spring. An extrusion liquid outlet block is arranged on the pressed plate. The extrusion liquid outlet block protrudes from the pressed plate and is conical. A guiding ball used for cooperating with the groove in the variable pitch strip is arranged in the guiding sleeve.

[0011] Furthermore, the extrusion liquid outlet block is made of a plastic material, such as rubber.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] First, during the use process, first change the existing fixed pitch of the screw into a variable pitch, and during the use process, adjust the pitch separately according to different pitch adjustments. For example, on the starting side of the screw, adjust the pitch to have a relatively large gap. At this time, the inclination angle between the variable pitch bars is relatively small, so that when the sliding table drives the heavy object to start, the torque requirement for the motor is reduced, facilitating the start. And at this time, the end gap of the variable pitch bar is adjusted to be relatively small. At this time, the inclination angle of the variable pitch bar becomes relatively large. When the pitch becomes larger, in the relative number of rotation circles, the moving distance of the object decreases. At the same time, due to the relatively large inclination angle, when the object moves, the external force that needs to be overcome increases, so that an auxiliary deceleration effect can be achieved;

[0014] Second, during use, the weight of the object can be detected through the connecting mechanism, and then the gap is adaptively adjusted according to the weight of the object. For example, the heavier the object, the smaller the angle at the starting end and the larger the angle at the end, so as to facilitate better starting and deceleration;

[0015] Third, during the use process, as the guiding ball continuously rolls and connects with the variable pitch bar, lubricating oil can be added inside at this time, so that the friction force between the guiding ball and the variable pitch bar is always maintained within a relatively appropriate range, avoiding an increase in the friction loss of the variable pitch bar due to too large a friction coefficient between the guiding ball and the variable pitch bar, thereby improving the service life of the device;

[0016] In summary, during the use of this variable pitch sliding table, the existing screw with a fixed pitch is changed into a screw with a variable pitch, so that when the device starts and brakes, the pitch is changed to different gaps respectively, so as to facilitate starting at the start and achieve an auxiliary deceleration effect at the end. And during the use process, the variable pitch bar can be continuously oiled, so that the friction coefficient between the variable pitch bar and the guiding ball is maintained within a relatively appropriate range, avoiding excessive wear of the guiding ball due to too large a friction coefficient and reducing the service life of the sliding table. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the main body's first perspective structure of the present invention;

[0019] Figure 2 Schematic diagram of the second perspective structure of the main body of the present invention;

[0020] Figure 3 Schematic diagram of the variable pitch bar structure of the present invention;

[0021] Figure 4 Schematic diagram of one end of the variable pitch bar of the present invention;

[0022] Figure 5 Schematic diagram of the sectional view of one end of the variable pitch bar of the present invention;

[0023] Figure 6 Schematic diagram of the internal structure of the connecting sleeve of the present invention;

[0024] Figure 7 Schematic diagram of the sectional view of the fixed extrusion seat on the other side of the present invention.

[0025] Reference numerals:

[0026] 1, base; 11, extrusion groove; 12, extrusion block; 2, rotating rod; 21, variable pitch bar; 3, connecting mechanism; 31, pressing and fitting plate; 32, mounting seat; 33, connecting spring; 34, connecting sleeve; 35, guide sleeve; 36, extrusion liquid outlet block; 37, pressed plate; 38, guide ball; 4, spacing adjustment mechanism; 41, fixed extrusion seat; 42, liquid inlet sleeve ring; 43, movable seat; 44, limiting ring; 45, communicating pipe; 46, guide pipe; 47, adjusting ring; 48, fitting fixed sleeve. Detailed implementation manners

[0027] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention.

[0029] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] As shown below in conjunction with Figures 1 to 7 The embodiment of the present invention provides a variable pitch slide table, which includes a base 1 for providing a supporting force and a rotating rod 2 connected to the base 1. It further includes a pitch adjusting mechanism 4 provided on the base 1 for changing the gap, and a connecting mechanism 3 for moving the workpiece. An extrusion groove 11 is formed on the base 1, an extrusion block 12 is arranged in the extrusion groove 11, and a spring for its reset is arranged between the extrusion groove 11 and the extrusion block 12.

[0033] During operation, in the process of using this variable pitch slide table, the existing fixed pitch screw is transformed into a variable pitch screw, so that when the device starts and brakes, the pitch is respectively changed to different gaps, thus facilitating startup at the start and achieving an auxiliary deceleration effect at the end. And during the use process, the variable pitch strip 21 can be continuously oiled, so that the friction coefficient between the variable pitch strip 21 and the guide ball 38 is maintained within a relatively appropriate range, avoiding excessive wear of the guide ball 38 due to too large a friction coefficient and reducing the service life of the slide table.

[0034] Specifically, the spacing adjustment mechanism 4 is arranged at both ends of the rotating rod 2. Each spacing adjustment mechanism 4 includes a fixed extrusion seat 41 and a matching fixed sleeve 48. An inlet liquid sleeve ring 42 is arranged outside the matching fixed sleeve 48. A rotating ring is arranged on the inlet liquid sleeve ring 42. The inlet liquid sleeve ring 42 is connected to the extrusion groove 11 through a connecting pipe passing through the rotating ring. The inlet liquid sleeve ring 42 is connected to the extrusion groove 11 through a connecting pipe. The fixed extrusion seat 41 is hollow. A fixed movable seat 43 can be arranged on the fixed extrusion seat 41. A limiting ring 44 is arranged at the end of the movable seat 43. An adjusting ring 47 is arranged beside the limiting ring 44. The adjusting ring 47 is connected to the limiting ring 44 through a guiding pipe 46. The inlet liquid sleeve ring 42 is communicated with the fixed extrusion seat 41 through a communicating pipe 45 passing through the movable base 1. Since the inlet liquid sleeve ring 42 is connected to the rotating rod 2, the inlet liquid sleeve ring 42 will rotate synchronously with the rotating rod 2. And a connection is needed between the extrusion groove 11 and the inlet liquid sleeve ring 42. At this time, the problem of pipeline entanglement needs to be considered. For this reason, a rotating ring is arranged on the inlet liquid sleeve ring 42, and the rotating ring is connected to the connecting pipe. At this time, when the inlet liquid sleeve ring 42 rotates, the rotating ring is restricted by the connecting pipe and will not rotate. However, since the rotating ring is rotatably connected to the inlet liquid sleeve ring 42, it will not affect the operation of the inlet liquid sleeve ring 42 either. The communicating pipe 45 is a flexible pipe.

[0035] Specifically, the end of the rotating rod 2 is connected to the driving motor. A variable pitch bar 21 is arranged outside the connecting rod. A guiding groove is opened on the variable pitch bar 21. The two ends of the variable pitch bar 21 are respectively connected to the corresponding adjusting rings 47. The middle section of the variable pitch bar 21 is connected to the rotating rod 2.

[0036] Specifically, the rotating rod 2 is thick in the middle and thin at both ends. The two ends of the variable pitch bar 21 are made of a plastic deformable material, such as elastic steel.

[0037] During operation, the rotating rod 2 is thick in the middle and thin at both ends. At this time, the middle part of the rotating rod 2 and the variable pitch bar 21 can be connected to the rotating rod 2, so that when the rotating rod 2 rotates, it can drive the variable pitch bar 21 to rotate synchronously. And if it is thin at both ends, there is a gap between the variable pitch bar 21 and the rotating rod 2.

[0038] Specifically, the connecting mechanism 3 includes a mounting seat 32. A pressing and matching plate 31 is arranged through the mounting seat 32. The cross-section of the pressing and matching plate 31 is U-shaped. A detection spring is arranged between the pressing and matching plate 31 and the mounting seat 32. And the pressing and matching plate 31 is used in cooperation with the extrusion block 12. A supplementary oil component is arranged in the pressing and matching plate 31.

[0039] Specifically, the oil replenishing component includes a connecting sleeve 34, which is arranged in the mounting seat 32. A guiding sleeve 35 is provided on the inner surface of the connecting sleeve 34. The guiding sleeve 35 is hollow. A squeezed plate 37 is arranged in the guiding sleeve 35. The squeezed plate 37 is connected to the connecting sleeve 34 through a return spring. An extrusion liquid block 36 is arranged on the squeezed plate 37. The extrusion liquid block 36 protrudes from the squeezed plate 37 in a conical shape. A guiding ball 38 for cooperating with the groove in the variable pitch bar 21 is arranged in the guiding sleeve 35.

[0040] Specifically, the extrusion liquid block 36 is made of a plastic material, such as rubber.

[0041] Specifically, when the extrusion liquid block 36 is not squeezed, the liquid outlet on the extrusion liquid block 36 is blocked at this time. After the extrusion liquid block 36 is squeezed, the liquid outlet is opened under the action of the subsequent oil, so that the liquid can flow out. At the same time, during the rolling process of the guiding ball 38, the lubricating oil in its guiding sleeve 35 can be taken out, so as to play a role in lubricating the groove in the variable pitch bar 21.

[0042] Working principle: During use, first place the item to be moved on the pressing and fitting plate 31. At this time, under the action of the weight, the detection spring between the pressing and fitting plate 31 and the mounting seat 32 is pressed. When the pressing and fitting plate 31 is pressed, the pressing and fitting plate 31 will simultaneously press the extrusion block 12. When the extrusion block 12 is extruded, it will drive the liquid in the extrusion groove 11, so that the liquid in the extrusion groove 11 enters the liquid inlet collar 42 through the connecting pipe. (It should be noted here that there are two extrusion grooves 11, which are located on both sides of the rotating rod 2 respectively. At this time, each extrusion groove 11 will be connected to the liquid inlet collar 42 at different positions through the connecting pipe, so that corresponding adjustments are made at both ends of the variable pitch bar 21). Then, it passes through the liquid inlet collar 42 and enters the fixed extrusion seat 41 through the communicating pipe 45, and then will extrude the movable seat 43, causing displacement. The displacement directions of the movable seats 43 at both ends are opposite, one moves outward and the other moves inward. When the movable seat 43 undergoes displacement, the limiting ring 44 provided at its end moves synchronously. The limiting ring 44 is connected to the adjusting ring 47 through the guide pipe 46, and the adjusting ring 47 is connected to the end of the variable pitch bar 21. When the position of the adjusting ring 47 changes, the pitch gap at both ends of the variable pitch bar 21 changes. The gap at the starting section becomes larger. When the pitch becomes larger, the inclination angle between the pitches becomes smaller. The gap at the end becomes smaller. When the pitch becomes smaller, the inclination angle between the pitches increases. When the inclination angle becomes smaller, when the rotating rod 2 rotates and drives the variable pitch bar 21 to rotate synchronously, it is more convenient for the object to move under the action of the thread. When the inclination angle of the variable pitch bar 21 at the end increases, the moving distance of the object becomes smaller when rotating one circle, and it is more difficult to move at the same time. Therefore, it can play an auxiliary braking effect;

[0043] When the mounting base 32 moves, at this time, the guiding ball 38 is engaged with the groove of the variable pitch bar 21, so that the mounting base 32 moves. At this time, the guiding ball 38 will roll when moving. There is lubricating oil in the guiding sleeve 35. During the rolling process of the guiding ball 38, the lubricating oil in the guiding sleeve 35 will be gradually carried out, which means that the amount of lubricating oil on both sides of the squeezed plate 37 gradually shows a difference at this time, and there is a gap on the side where the lubricating oil overflows. At this time, the squeezed plate 37 is always squeezed under the action of the connecting spring 33, so as to squeeze out the lubricating oil in the other squeezed plate 37, so as to ensure that the lubricating effect can be increased under the action of the guiding ball 38. Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable pitch slide, comprising a base (1) for providing a supporting force and a rotating rod (2) connected to the base (1), characterized in that; It also includes a spacing adjustment mechanism (4) arranged on the base (1) for changing the gap, and a connecting mechanism (3) for moving the workpiece, wherein the base (1) is provided with an extrusion groove (11), and an extrusion block (12) is arranged in the extrusion groove (11).

2. A variable pitch slide according to claim 1, characterized in that; The spacing adjustment mechanisms (4) are arranged at both ends of the rotating rod (2). Each of the spacing adjustment mechanisms (4) comprises a fixed extrusion seat (41) and a matching fixed sleeve (48). A liquid inlet ring (42) is arranged outside the matching fixed sleeve (48). A rotating ring is arranged on the liquid inlet ring (42). The liquid inlet ring (42) is connected to the extrusion groove (11) via a connecting pipe penetrating the rotating ring. The fixed extrusion seat (41) is hollow. A movable seat (43) that can be fixed is arranged on the fixed extrusion seat (41). A limiting ring (44) is arranged at the end of the movable seat (43). An adjusting ring (47) is arranged on the side of the limiting ring (44). The adjusting ring (47) and the limiting ring (44) are connected via a guide tube (46). The liquid inlet ring (42) penetrates the movable base (1) via a connecting pipe (45) to communicate with the fixed extrusion seat (41).

3. A variable pitch slide according to claim 1, characterized in that; The end of the rotating rod (2) is connected to the driving motor, a variable pitch bar (21) is arranged outside the connecting rod, a guide groove is provided on the variable pitch bar (21), both ends of the variable pitch bar (21) are respectively connected to corresponding adjustment rings (47), and the middle section of the variable pitch bar (21) is connected to the rotating rod (2).

4. A variable pitch slide according to claim 3, characterized in that; The rotating rod (2) is thick in the middle and thin at both ends, and both ends of the variable pitch strip (21) are made of a plastic deformable material, such as elastic steel.

5. The variable pitch slide according to claim 1, characterized in that; The connecting mechanism (3) comprises a mounting seat (32), a press-fit plate (31) is arranged through the mounting seat (32), the press-fit plate (31) has a U-shaped cross section, and the press-fit plate (31) is used in conjunction with an extrusion block (12), a detection spring is arranged between the press-fit plate (31) and the mounting seat (32), and an oil replenishing assembly is arranged in the press-fit plate (31).

6. A variable pitch slide according to claim 5, characterized in that; The oil replenishing assembly comprises a connecting sleeve (34), the connecting sleeve (34) being arranged in a mounting seat (32), and a guide sleeve (35) being arranged on the inner surface of the connecting sleeve (34), the guide sleeve (35) being hollow, an extruded plate (37) being arranged in the guide sleeve (35), the extruded plate (37) and the connecting sleeve (34) being connected via a return spring, an extruded liquid block (36) being arranged on the extruded plate (37), the extruded liquid block (36) protruding from the extruded plate (37) in a conical shape, and a guide ball (38) being arranged in the guide sleeve (35) for use in cooperation with a groove in a variable pitch strip (21).

7. A variable pitch slide according to claim 6, characterized in that; The extruded liquid block (36) is made of a plastic material, such as rubber.

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