An adjustable wheelbase roller machine

Abstract

The present invention discloses an adjustable wheelbase roller machine, and relates to the technical field of roller machines. The adjustable wheelbase roller machine comprises a machine body, wherein the upper and lower ends of the machine body are respectively provided with a feed port and a discharge port, and further comprises a roller assembly arranged on the machine body, wherein the roller assembly comprises slots arranged on both sides of the machine body, wherein the slots are communicated with the interior of the machine body, and two groups of mounting shafts are arranged on the slots. In the process of crushing materials, the roller machine of the present invention adjusts the wheelbase of two groups of crushing rollers through the mutual cooperation of a driving assembly, an adjusting assembly, a guiding assembly and a linkage assembly. Through the adjustment of the wheelbase, the roller machine is convenient to adapt to different processing requirements. In the process of adjusting the wheelbase, through the mutual cooperation of a judging assembly and an identifying assembly, it is judged that the parallel state between the two groups of crushing rollers after adjustment is abnormal, and timely adjustment is required to avoid insufficient crushing of materials caused by the non-parallelism between the two groups of crushing rollers.

Description

Technical Field

[0001] The invention relates to the technical field of roller machines, in particular to a roller machine with adjustable wheelbase. Background Art

[0002] Roller mill is a common crushing equipment, which mainly consists of two rollers rotating in opposite directions. The two rollers are usually cylindrical and mounted on fixed bearings. The surface of the rollers can be smooth, or have teeth or grooves, depending on the characteristics of the material to be processed and the crushing requirements. There is a feed port above the two rollers for feeding the material to be crushed, and a discharge port below, where the crushed material is discharged.

[0003] The adjustable wheelbase of the roller mill enables it to produce products of various particle sizes according to different production requirements. For example, in the mining industry, when it is necessary to produce coarse-grained ore particles for construction coarse aggregates, the wheelbase can be increased so that the ore is subjected to relatively small extrusion force between the two rollers, thereby obtaining products with larger particle sizes; and when it is necessary to produce fine-grained ore for chemical raw material grinding, the wheelbase can be reduced so that the ore is squeezed and crushed more strongly, and a smaller particle size product is produced. In this way, by simply adjusting the wheelbase, the same roller mill can meet the product particle size requirements of different customers or different production links.

[0004] However, in the process of adjusting the wheelbase of the double-roller machine, the two sets of rollers are often not parallel. When the rollers are not parallel, the materials will be unevenly distributed between the rollers during the crushing process, resulting in excessive pressure on the rollers on one side and insufficient crushing of the materials on the other side. Whether the rollers are parallel is difficult to observe and identify intuitively during the adjustment process, resulting in the inability to judge the status of the two sets of rollers after adjustment. For this reason, we propose a double-roller machine with an adjustable wheelbase. Summary of the invention

[0005] The object of the present invention is to provide a roller mill with adjustable wheelbase to solve the problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable wheelbase roller machine, comprising a machine body, wherein the upper and lower ends of the machine body are respectively provided with a feed port and a discharge port, and also comprising a roller assembly arranged on the machine body, wherein the roller assembly comprises slots arranged on both sides of the machine body, the slots are communicated with the interior of the machine body, two groups of mounting shafts are arranged on the slots, crushing rollers are fixed on the mounting shafts, the crushing rollers are located inside the machine body, a flexible sealing belt for sealing connection with the mounting shaft is arranged inside the slots, the flexible sealing belt is sleeved and fixed on the outside of the mounting shaft, mounting sleeves are sleeved at both ends of the mounting shaft, an adjustment component for spacing adjustment and a guide component for guiding during the adjustment process are arranged between the two groups of mounting sleeves located on the same side, the adjustment component and the guide component are symmetrically arranged on the upper and lower sides of the mounting sleeve, a judgment component for state judgment between the two groups of crushing rollers during the adjustment process and an identification component for identification after judgment are arranged on one side of the machine body, and a drive component for driving the mounting shaft is arranged on the mounting sleeve.

[0007] Preferably, the adjusting assembly includes a first mounting plate fixed to the outside of the mounting sleeve, two groups of fixing plates are fixed to the outside of the body, the two groups of the first mounting plates are located between the two groups of fixing plates, a threaded sleeve is fixed on the first mounting plate, a double-headed screw is rotatably connected between the two groups of the first mounting plates, the two groups of the threaded sleeves are respectively meshed with the two ends of the double-headed screw, and the threads at the two ends of the double-headed screw are arranged in opposite directions, a first motor for driving the double-headed screw is installed on the fixing plate, and the double-headed screws on the adjusting assemblies on both sides of the body are connected and transmitted through a linkage assembly.

[0008] Preferably, the guide assembly includes a second mounting plate fixed to the outside of the mounting sleeve, two groups of the second mounting plates are slidably connected with guide rods, and the guide rods are fixed between the two groups of fixed plates.

[0009] Preferably, the linkage assembly includes a support frame fixed to one side of the machine body, the support frame is rotatably connected to a linkage shaft, both ends of the linkage shaft are fixed with worms, one end of the double-headed screw is fixed with a worm wheel, and the worm and worm wheel are meshed with each other.

[0010] Preferably, the driving assembly comprises an L-shaped frame fixed to the front end of the mounting sleeve, and a second motor for driving the mounting shaft is mounted on the L-shaped frame.

[0011] Preferably, the judgment component includes a connecting plate fixed on two groups of first mounting plates, a transmission plate is fixed on the opposite side of the two groups of connecting plates, the two groups of transmission plates are arranged up and down and are in a parallel state with each other, the two groups of transmission plates are provided with sliding grooves, and the two groups of sliding grooves are provided with transmission rods, and the transmission rod is connected and transmitted to the identification component through the transmission component.

[0012] Preferably, the identification component includes a mounting frame fixed to the outside of the machine body, the mounting frame is rotatably connected to a connecting shaft, a pointer is fixed to the upper end of the connecting shaft, and the mounting frame is provided with scale lines for identifying the rotation amplitude of the pointer.

[0013] Preferably, the transmission assembly includes a gear fixed on the connecting shaft, a rack is fixed to one end of the transmission rod, the rack and the gear are meshed with each other, and a connecting assembly for connecting the rack is provided on the outside of the body.

[0014] Preferably, the connecting assembly includes a fixing frame fixed to the outside of the machine body, a plurality of groups of round rods are slidably connected to the rack, the round rods are fixed between two groups of fixing frames, and a spring is sleeved on the outside of each group of the round rods.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the process of crushing materials, the roller machine of the present invention adjusts the wheelbase of the two groups of crushing rollers through the cooperation of the driving component, the adjusting component, the guiding component and the linkage component. The adjustment of the wheelbase makes it easy for the roller machine to adapt to different processing requirements. In the process of adjusting the wheelbase, the parallel state between the two groups of crushing rollers after adjustment is judged to be abnormal through the cooperation of the judging component and the identifying component, and timely adjustment is required to avoid insufficient crushing of materials caused by the non-parallelism between the two groups of crushing rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the bottom structure of the machine body of the present invention;

[0019] Figure 3 It is a schematic diagram of the linkage assembly structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the roller assembly of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the adjustment component and the guide component of the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the judgment component of the present invention;

[0023] Figure 7 It is a schematic diagram of the structure of the identification component, the transmission component and the connection component of the present invention;

[0024] Figure 8 It is a schematic diagram of the structure of the identification component and the connection component of the present invention.

[0025] In the figure: 101, machine body; 102, feed port; 103, discharge port; 201, slot; 202, mounting shaft; 203, crushing roller; 204, flexible sealing belt; 3, mounting sleeve; 401, first mounting plate; 402, fixing plate; 403, threaded sleeve; 404, double-headed screw rod; 405, first motor; 501, second mounting plate; 502, guide rod; 601, support frame; 602 , linkage shaft; 603, worm; 604, worm wheel; 701, L-shaped frame; 702, second motor; 801, connecting plate; 802, transmission plate; 803, slide groove; 804, transmission rod; 901, mounting frame; 902, connecting shaft; 903, pointer; 904, scale line; 1001, gear; 1002, rack; 1101, fixing frame; 1102, round rod; 1103, spring. DETAILED DESCRIPTION

[0026] 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.

[0027] Example 1

[0028] See also Figure 1-Figure 8 The adjustable wheelbase roller mill shown in the figure includes a machine body 101, wherein the upper and lower ends of the machine body 101 are respectively provided with a feed port 102 and a discharge port 103, and further includes a roller assembly arranged on the machine body 101, wherein the roller assembly includes slots 201 arranged on both sides of the machine body 101, wherein the slots 201 are communicated with the interior of the machine body 101, wherein two sets of mounting shafts 202 are arranged on the slots 201, wherein crushing rollers 203 are fixed on the mounting shafts 202, wherein the crushing rollers 203 are located inside the machine body 101, and wherein the interior of the slots 201 is provided with a sealing member for sealingly connecting with the mounting shafts 202. Flexible sealing belt 204, flexible sealing belt 204 is sleeved and fixed on the outside of mounting shaft 202, mounting sleeves 3 are sleeved on both ends of mounting shaft 202, and an adjustment component for spacing adjustment and a guide component for guiding during adjustment are arranged between two sets of mounting sleeves 3 on the same side, and the adjustment component and the guide component are symmetrically arranged on the upper and lower sides of the mounting sleeve 3, and a judgment component for judging the state between the two sets of crushing rollers 203 during the adjustment process and an identification component for identifying after judgment are arranged on one side of the machine body 101, and a driving component for driving the mounting shaft 202 is arranged on the mounting sleeve 3;

[0029] It should be noted here that: during the process of crushing the material, the wheelbase of the two sets of crushing rollers 203 is adjusted by the cooperation of the driving component, the adjusting component, the guiding component and the linkage component. The adjustment of the wheelbase makes it easier for the roller machine to adapt to different processing requirements. In the process of wheelbase adjustment, the parallel state between the two sets of crushing rollers 203 after adjustment is judged to be abnormal through the cooperation of the judging component and the identifying component, and timely adjustment is required to avoid insufficient crushing of the material due to the non-parallelism between the two sets of crushing rollers 203.

[0030] Preferably, the adjustment component includes a first mounting plate 401 fixed to the outside of the mounting sleeve 3, two groups of fixing plates 402 are fixed to the outside of the body 101, the two groups of first mounting plates 401 are located between the two groups of fixing plates 402, a threaded sleeve 403 is fixed on the first mounting plate 401, a double-headed screw 404 is rotatably connected between the two groups of first mounting plates 401, the two groups of threaded sleeves 403 are respectively meshed with the two ends of the double-headed screw 404, and the threads at the two ends of the double-headed screw 404 are arranged in opposite directions, a first motor 405 for driving the double-headed screw 404 is installed on the fixing plate 402, and the double-headed screws 404 on the adjustment components on both sides of the body 101 are connected for transmission through a linkage component; the guide component includes a second mounting plate 501 fixed to the outside of the mounting sleeve 3, and the two groups of second mounting plates 501 are slidably connected with guide rods 502, and the guide rods 502 are fixed between the two groups of fixing plates 402;

[0031] It should be noted here that: the double-headed screw 404 is driven to rotate by the first motor 405. Since the threads at both ends of the double-headed screw 404 are arranged in opposite directions, during the rotation of the double-headed screw 404, the two groups of threaded sleeves 403 are respectively meshed with the two ends of the double-headed screw 404 to drive the two groups of first mounting plates 401 and mounting sleeves 3 to rotate after being subjected to force. During the movement of the mounting sleeve 3, the sliding guiding effect of the second mounting plate 501 and the guide rod 502 makes the two groups of mounting sleeves 3 move closer to or away from each other after being subjected to force. Through the movement of the two groups of mounting sleeves 3 towards or away from each other, the two groups of mounting shafts 202 and the two groups of crushing rollers 203 are driven to move synchronously. Through the movement of the two groups of crushing rollers 203, the wheelbase of the two groups of crushing rollers 203 is adjusted.

[0032] Preferably, the linkage assembly includes a support frame 601 fixed to one side of the body 101, a linkage shaft 602 is rotatably connected to the support frame 601, worms 603 are fixed at both ends of the linkage shaft 602, a worm wheel 604 is fixed at one end of the double-headed screw 404, and the worm 603 and the worm wheel 604 are meshed with each other;

[0033] It should be noted here that: in the process of moving and driving the two groups of mounting sleeves 3 on the same side, the worm wheel 604 is driven to rotate by the rotation of the double-headed screw 404. In the process of the rotation of the worm wheel 604, the worm 603 at both ends of the linkage shaft 602 is respectively meshed with the two groups of worm wheels 604, so that the double-headed screw 404 on the adjustment component on the other side rotates synchronously. Through the synchronous driving action of the adjustment components on both sides of the body 101, the two ends of the crushing roller 203 can move synchronously during the adjustment of the wheelbase of the crushing roller 203, thereby ensuring the stability of the adjustment of the wheelbase of the crushing roller 203.

[0034] Preferably, the driving assembly includes an L-shaped frame 701 fixed to the front end of the mounting sleeve 3, and a second motor 702 for driving the mounting shaft 202 is installed on the L-shaped frame 701;

[0035] It should be noted here that: the second motor 702 drives the installation shaft 202 to rotate, and the rotation of the installation shaft 202 drives the crushing roller 203 to rotate, and the input material is crushed by the rotation of the crushing roller 203.

[0036] Preferably, the identification component includes a connecting plate 801 fixed on two groups of first mounting plates 401, a transmission plate 802 is fixed on the opposite side of the two groups of connecting plates 801, the two groups of transmission plates 802 are arranged up and down and in parallel with each other, the two groups of transmission plates 802 are provided with a slide groove 803, the two groups of slide grooves 803 are provided with a transmission rod 804, and the transmission rod 804 is connected and transmitted to the identification component through the transmission component;

[0037] It should be noted here that: in the process of adjusting the wheelbase of the crushing roller 203, when the two groups of crushing rollers 203 do not maintain relative parallelism and generate an angle after adjustment, the connection effect of the first mounting plates 401 on the two groups of mounting sleeves 3 drives the transmission plates 802 on the two groups of connecting plates 801 to generate an angle. In the process of the two groups of connecting plates 801 generating an angle, the inner walls of the slide grooves 803 on the two groups of connecting plates 801 act on the transmission rod 804, so that the transmission rod 804 is forced to move. In the process of the movement of the transmission rod 804, the rack 1002 is driven to rotate. In the process of the movement of the rack 1002, the mutual meshing transmission between the rack 1002 and the gear 1001 drives the connecting shaft 902 and the pointer 903 at one end of the connecting shaft 902 to rotate.

[0038] Preferably, the identification component includes a mounting frame 901 fixed to the outside of the body 101, a connecting shaft 902 is rotatably connected to the mounting frame 901, a pointer 903 is fixed to the upper end of the connecting shaft 902, and a scale line 904 for identifying the rotation amplitude of the pointer 903 is provided on the mounting frame 901; the transmission component includes a gear 1001 fixed to the connecting shaft 902, a rack 1002 is fixed to one end of the transmission rod 804, the rack 1002 and the gear 1001 are meshed with each other, and a connecting component for connecting the rack 1002 is provided on the outside of the body 101;

[0039] It should be noted here that: in the process of adjusting the wheelbase of the crushing roller 203, the transmission rod 804 is forced to move through the transmission, and in the process of the movement of the transmission rod 804, the rack 1002 is driven to rotate. In the process of the movement of the rack 1002, the mutual engagement transmission between the rack 1002 and the gear 1001 drives the connecting shaft 902 and the pointer 903 at one end of the connecting shaft 902 to rotate. The rotation of the pointer 903 and the identification of the rotation angle of the pointer 903 by the scale line 904 determine that the parallel state between the two sets of crushing rollers 203 after adjustment is abnormal.

[0040] Preferably, the connecting assembly includes a fixing frame 1101 fixed to the outside of the body 101, a plurality of groups of round rods 1102 are slidably connected to the rack 1002, the round rods 1102 are fixed between two groups of fixing frames 1101, and a spring 1103 is sleeved on the outside of each group of round rods 1102;

[0041] It should be noted here that: the movement of the rack 1002 is guided by the multiple groups of round rods 1102 on the fixed frame 1101, and the rack 1002 is reset after movement by the multiple groups of springs 1103.

[0042] In this scheme: an adjustable wheelbase roller machine includes the following steps:

[0043] In the process of crushing the material, the roller mill feeds the material into the body 101 through the feed port 102. In the process of feeding, the second motor 702 drives the mounting shaft 202 to rotate, and the rotation of the mounting shaft 202 drives the crushing roller 203 to rotate. The input material is crushed by the rotation of the crushing roller 203, and the processed material is discharged outward through the discharge port 103.

[0044] In the process of crushing the material, the double-headed screw 404 is driven to rotate by the first motor 405. Since the threads at both ends of the double-headed screw 404 are arranged in opposite directions, during the rotation of the double-headed screw 404, the two sets of threaded sleeves 403 are respectively meshed with the two ends of the double-headed screw 404 to rotate the two sets of first mounting plates 401 and mounting sleeves 3 after being subjected to force. During the movement of the mounting sleeve 3, the sliding guiding effect of the second mounting plate 501 and the guide rod 502 makes the two sets of mounting sleeves 3 after being subjected to force move closer to or away from each other. The two sets of mounting sleeves 3 move closer to or away from each other, driving the two sets of mounting shafts 202 and the two sets of crushing rollers 203 to move synchronously. The movement of the roller 203 adjusts the wheelbase of the two groups of crushing rollers 203. Through the adjustment of the wheelbase, the roller machine can adapt to different processing requirements. In the process of moving and driving the two groups of mounting sleeves 3 on the same side, the double-headed screw 404 is rotated to drive the worm gear 604 to rotate. In the process of the rotation of the worm gear 604, the worm 603 at both ends of the linkage shaft 602 is respectively meshed with the two groups of worm gears 604, so that the double-headed screw 404 on the adjustment component on the other side rotates synchronously. Through the synchronous driving action of the adjustment components on both sides of the machine body 101, the two ends of the crushing roller 203 can move synchronously during the process of adjusting the wheelbase of the crushing roller 203, thereby ensuring the stability of the adjustment of the wheelbase of the crushing roller 203.

[0045] In the process of adjusting the wheelbase of the crushing rollers 203, when the two groups of crushing rollers 203 are not kept relatively parallel and an angle is formed after adjustment, the connecting action of the first mounting plates 401 on the two groups of mounting sleeves 3 drives the transmission plates 802 on the two groups of connecting plates 801 to form an angle. In the process of the two groups of connecting plates 801 forming an angle, the inner walls of the slide grooves 803 on the two groups of connecting plates 801 act on the transmission rod 804, so that the transmission rod 804 is forced to move. In the process of the movement of the transmission rod 804, The rack 1002 is driven to rotate. During the movement of the rack 1002, the connecting shaft 902 and the pointer 903 at one end of the connecting shaft 902 are driven to rotate through the mutual meshing transmission between the rack 1002 and the gear 1001. The pointer 903 rotates and the scale line 904 identifies the rotation angle of the pointer 903, and it is determined that the parallel state between the two sets of crushing rollers 203 after adjustment is abnormal, and timely adjustment is required to avoid insufficient crushing of the material due to the non-parallelism between the two sets of crushing rollers 203.

[0046] 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.

[0047] 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. An adjustable wheelbase roller machine, comprising: A machine body (101), wherein the upper and lower ends of the machine body (101) are respectively provided with a feed inlet (102) and a discharge outlet (103); It is characterized by further comprising: A pair of roller assemblies is arranged on a machine body (101), the pair of roller assemblies comprising slots (201) opened on both sides of the machine body (101), the slots (201) being communicated with the interior of the machine body (101), two groups of mounting shafts (202) being arranged on the slots (201), crushing rollers (203) being fixed on the mounting shafts (202), the crushing rollers (203) being located inside the machine body (101), and flexible sealing belts (204) for sealingly connecting with the mounting shafts (202) being arranged inside the slots (201), the flexible sealing belts (204) being sleeved The mounting shaft (202) is fixed to the outside of the mounting shaft (202), and mounting sleeves (3) are sleeved at both ends of the mounting shaft (202). An adjustment component for adjusting the spacing and a guide component for guiding during the adjustment process are arranged between two groups of mounting sleeves (3) located on the same side. The adjustment component and the guide component are symmetrically arranged on the upper and lower sides of the mounting sleeve (3). A judgment component for judging the state between the two groups of crushing rollers (203) during the adjustment process and an identification component for identifying after the judgment are arranged on one side of the machine body (101). A driving component for driving the mounting shaft (202) is arranged on the mounting sleeve (3).

2. The adjustable wheelbase roller machine according to claim 1, characterized in that: The adjustment component comprises a first mounting plate (401) fixed to the outside of the mounting sleeve (3); two groups of fixing plates (402) are fixed to the outside of the machine body (101); the two groups of the first mounting plates (401) are located between the two groups of fixing plates (402); a threaded sleeve (403) is fixed on the first mounting plate (401); a double-headed screw (404) is rotatably connected between the two groups of the first mounting plates (401); the two groups of the threaded sleeve (403) are respectively meshed with the two ends of the double-headed screw (404); and the threads at the two ends of the double-headed screw (404) are arranged in opposite directions; a first motor (405) for driving the double-headed screw (404) is installed on the fixing plate (402); and the double-headed screws (404) on the adjustment components located on both sides of the machine body (101) are connected and driven via a linkage component.

3. The adjustable wheelbase roller machine according to claim 2, characterized in that: The guide assembly comprises a second mounting plate (501) fixed to the outside of the mounting sleeve (3), two groups of the second mounting plates (501) are slidably connected with guide rods (502), and the guide rods (502) are fixed between the two groups of fixed plates (402).

4. The adjustable wheelbase roller machine according to claim 2, characterized in that: The linkage assembly comprises a support frame (601) fixed to one side of the machine body (101), a linkage shaft (602) being rotatably connected to the support frame (601), worms (603) being fixed at both ends of the linkage shaft (602), a worm wheel (604) being fixed at one end of the double-headed lead screw (404), and the worm (603) and the worm wheel (604) being meshed with each other.

5. The adjustable wheelbase roller machine according to claim 1, characterized in that: The driving assembly comprises an L-shaped frame (701) fixed to the front end of the mounting sleeve (3), and a second motor (702) for driving the mounting shaft (202) is mounted on the L-shaped frame (701).

6. The adjustable wheelbase roller machine according to claim 2, characterized in that: The identification component comprises a connecting plate (801) fixed on two groups of first mounting plates (401); a transmission plate (802) is fixed on opposite sides of the two groups of connecting plates (801); the two groups of transmission plates (802) are arranged vertically and in parallel with each other; a slide groove (803) is provided on the two groups of transmission plates (802); a transmission rod (804) is provided on the two groups of slide grooves (803); the transmission rod (804) is connected and transmitted to the identification component via the transmission component.

7. The adjustable wheelbase roller machine according to claim 6, characterized in that: The identification component comprises a mounting frame (901) fixed to the outside of the machine body (101); a connecting shaft (902) is rotatably connected to the mounting frame (901); a pointer (903) is fixed to the upper end of the connecting shaft (902); and a scale line (904) for identifying the rotation amplitude of the pointer (903) is provided on the mounting frame (901).

8. The adjustable wheelbase roller machine according to claim 7, characterized in that: The transmission assembly comprises a gear (1001) fixed on a connecting shaft (902); a rack (1002) is fixed to one end of the transmission rod (804); the rack (1002) and the gear (1001) are meshed with each other; and a connecting assembly for connecting the rack (1002) is arranged on the outer side of the body (101).

9. The adjustable wheelbase roller machine according to claim 8, characterized in that: The connection assembly comprises a fixing frame (1101) fixed to the outside of the machine body (101); a plurality of groups of round rods (1102) are slidably connected to the rack (1002); the round rods (1102) are fixed between two groups of fixing frames (1101); and a spring (1103) is sleeved on the outside of each group of the round rods (1102).

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